-trrWT* f ^ i c vnt ■ I : Encyclopaedia Britannica, M I C Microfcope. "J\ /|" ICROSCOPE, an optical inflrument, confifting jLVX of lenfes, or mirrors, by means of which fmall objects appear larger than they do to the naked eye. Sing/e microfcepes confill: of a fingle lens or mirror ; or if more lenfes or mirrors be made ufe of, they only ferve to throw light upon the objeft, but do not contribute to enlarge the image of it. Double or compound mi- crofcopes are thofe in which the image of an object is eompofed by means of more lenfes or mirrors than one. For the principles on which the conftru&ion of mi- crofcopes depends, fee Optics. In the prefent ar¬ ticle, it is intended to defcribe the finilhed inftrument, with all its varied apparatus, according to the lateft im¬ provements ; and to illuftrate by proper details its ufes and importance. I. Of Single Microfcopes. The famous microfcopes made ufe of by Mr Leeu- w^enhoeck, W'ere all, as Mr Baker affures us, of the Tingle kind, and the conftruftion of them was the moft iimple poflible ; each confifting only of a fingle lens fet between two plates of filver, perforated with a fmall hole, with a moveable pin before it to place the ob- jeft on and adjuft it to the eye of the beholder. He informs us alfo, that lenfes only, and not globules, were uied in every one of thefe microfcopes. Plate i. The fingle microfcope now moft generally known cccxxxvn. and ufed is that called Wilfon's Pocket Microfcope. The body is made of brafs, ivory, or filver, and is repre- fented by AA, BB. CC is a long fine=threaded male fcrew that turns into the body of the microfcope ; D a convex glafs at the end of the fcrew. Twm con¬ cave round pieces of thin brafs, with holes of different diameters in the middle of them, are placed to cover the above mentioned glafs, and thereby diminifti the aperture when the greateft magnifiers are employed. EE, three thin plates of brafs within the body of the microfcope ; one of which is bent femicircularly in the middle, fo as to form an arched cavity for the recep¬ tion of a tube of glafs, the ufe of the other two be¬ ing to receive and hold the Aiders between them. F, a piece of wood or ivory, arched in the manner of the femicircular plate, and cemented to it. G, the other end of the body of the microfcope, where a hol¬ low female fcrew is adapted to receive the different magnifiers. H is a fpiral fpring of fteel, between VOL. XIV. Part I. M 1 C the end G and the plates of brafs, intended to keep Microfcope. the plates in a right pofition and counteraft the long —v-—-' fcrew CC. I is a fmall turned handle, for the better holding of the inftrument, to fcrew on or off at plea- fure. To this microfcope belong fix or feven magnifying glaffes : fix of them are fet in filver, brafs, or ivory, as in the figure K ; and marked i, 2, 3, 4, 5, 6, the loweft numbers being the greateft magnifiers. L is the feventh magnifier, fet in the manner of a little barrel, to be held in the hand for the viewing of any larger object. M is a flat flip of ivory, called a fider, with four round holes through it, wherein to place objefts between turn pieces of glafs or Mufcovy talc, as they appear at dddd. Six fuch Aiders, and one of brafs, are ufually fold with this microfcope, fome with objedls placed in them, and others empty for viewing any thing that may offer : but whoever pleafes to make a colledlion, may have as many as he defires. The brafs Aider is to confine any fmall obje£l, that it may be viewed without cruftiing or deftroying it. N is a tube of glafs contrived to confine living ob- jefts, fuch as frogs, fifties, &c. in order to diicover the circulation of the blood. All thefe are contained in a little neat box of fifti-fldn or mahogany, very con¬ venient for carrying in the pocket. When an object is to be viewed, thruft the ivory Aider, in which the faid objeift is placed, between the twm flat brafs plates EE : obferving always to put that fide of the Aider where the brafs rings are far- theft from the eye. Then fcrew on the magnifying glais you intend to ufe, at the end of the inftrument G ; and looking through it againft the light, turn the long fcrew CC, till your objeift be brought to fuit your eye ; which will be known by its appearing perfe6fly diftinft and clear. It is moft proper to look at it firft through a magnifier that can ftiow the whole at once, and attenvards to infpeft the feveral parts more parti¬ cularly with one of the greateft magnifiers \ for thus you will gain a true idea of the whole, and of all its parts. And though the greateft magnifiers can ftiow but a minute portion of any objedl at once, fuch as the claw ol a flea, the horn of a loufe, or the like ; yet by gent1^ moving the Aider which contains the objeil, the eye may gradually examine it all over. As objefts murt be brought very near the glaffes when the greateft magnifiers are made ufe of, be care¬ ful not tp fcratch them by rubbing the Aider againft A them MIC [2 Microfcepe. them as you move it in or out. A few turns of the v fcrew CC will eafily prevent this mifchief, by giving them room enough. You may change the objeds in your Aiders for any others you think proper, by taking out the brafs rings with the point of a penknife j the talcs will then fall out, if you but turn the Aiders j and after putting what you pleafe between them, by replacing the brafs rings you will faften them as they were before. It is proper to have fome Aiders furniAi- ed with talcs, but without any obje£t between them, to be always in readinefs for the examination of Auids, falls, fands, powders, the farina of flowers, or any other cafual objefts of fuch fort as need only be applied to the outfide of the talc. The circulation of the blood may be eafieft feen in the tails or fins of fiflies, in the fine membranes be¬ tween g frog’s toes, or beft of all in the tail of a water-newt. If your objeft be a fmall fifli, place it within the tube N, and fpread its tail or fin along the fide thereof: if a frog, choole fuch a one as can but juft be got into your tube *, and, with a pen, or fmall ftick, expand the tranfparent membrane between the toes of the frog’s hind foot as much as you can. When your objedl is fo adjufted that no part of it can inter¬ cept the light from the place you intend to view, un- fcrew the long fcrew CC, and thruft your tube into the arched cavity, quite through the body of the mi- crofcope ; then fcrew it to the true focal diftance, arid you will fee the blood palling along its veffels with a rapid motion, and in a moft furprifing manner. The third or fourth magnifiers may be ufed for frogs or fifties : but for the tails of water-newts, the fifth or fixth will do $ becaufe the globules of their blood are twice as large as thofe of frogs or fifli. The firft or fecond magnifier cannot well be employed for this purpofe j becaufe the thicknefs of the tube in which the objedt lies, will fcarce admit its being brought fo near as the focal diftance of the magni: fkr. An apparatus for the purpofe of viewing opaque, objedts generally accompanies this microfcope ; and which confifts of the following parts. A brals arn\ QR, which is fcrewed at Q, upon the body of the mi¬ crofcope at G. Into the round hole R, any of the^ magnifiers fuitable to the objedl to be viewed are to. be fcrewed j and under it, in the fame ring, the con¬ cave poliftied filver fpeculum S. Through a fmaH aperture in the body of the microfcope under the brafs plates EE, is to Aide the long wire with thq forceps T : This wire is pointed at one of its ends; and fo, that either the points or forceps may be ufed ' for the objedts • as may be neceflary. It is eafy to conceive, therefore, that the arm at R, which turns, by a twofold joint at# and b, may be brought with its magnifier over the objedt, the light reAedted upon it by the application of the fpeculum, and the true, focus obtained by turning of the male fcrew CC as before diredted.— As ol jedts are fometimes riot'well fixed for view, either by the forceps, or .point,; the imall piece thown at V is added, and in. fuch cafes anfwers better : it fcrews over the point of TiCcun- tains a fmall round piece of ivory, blackened on one fide, and left white upon the other as a contraft to coloured objedts, and by a fmall piece of vvatch-fpring fallens down the objedts upon the ivory. ] MIC 2. Sing/e Micr^ofcope by refleElion. In fig. 2. A is a Microfcope.. fcroll of brafs fixed upright upon a round wooden —y—”j bafe B, or mahogany drawer or cafe, fo as to ftand perfedtly firm and fteady. C is a brafs fcrew, that paf- fes through a hole in the upper limb of the fcroll in¬ to the fide of the microfcope D, and fclews it faft to the faid fcroll. E is a concave fpeculum fet in a box of brafc, which hangs in the arch G by two fmall fcrews ff that fcrew into the oppolite fides thereof. At the bottom of this arch is a pin of the fame metal, exadlly fitted to a hole h in the wooden pedeftal, made . for tire reception of the pin. As the arch turns on this pin, and the fpeculum turns on the end of the arch, it may, by this twofold motion, be eafily adjuft¬ ed in fuch a manner as to refledl the light of the fun, of the fky, or of a candle, diredtly upwards through the microfcope that is fixed perpendicularly over it j and by fo doing may be made to anfwer many pur- pofes of the large double refle&ing microfcope. The body of the microfcope may alfo be fixed horizon¬ tally, and obje£ls viewed in that pofition by any light you choofe; which is an advantage the common double, reflefting microfcope has not. It may alfo be render¬ ed further ufeful by means of a flip of glafs $ one end of which being thruft through between the plates where the Aiders go, and the other extending to fome diftance^ fuch o! je£ls may be placed thereon as cannot be ap¬ plied in the Aiders : and then, having a limb of brafs that may faften to the body of the microfcope, and ex.-, tend over the projecting glafs a hollow ring wherein to fcrew the magnifiers, all forts of fubjefts may be examined with great convenience, if a hole be made in the pedeftal, to place the fpeculum exaftly underneath, and thereby throw up the rays of, light. The pocket- microfcope, thus mounted, fays Mr Baker, “ is as eafy and pleafant in its ufe ; as fit for the moft curious ex¬ amination of the animalcules and falls in fluids, of the. farinae in vegetables, and of the circulation in fmall animals; in fliort,, is as likely to make conflderable difco.veries in objeCts that have fome degree of tranf- parency, as, any microfcope I have ever feen or heard of.” The brafs fcroll A is now generally made to un- ferew into three parts, and pack with the microfcope and apparatus into the drawer of a mahogany pocket- cafe, upon the lid of which the fcroll is made to fix when in ufe. The opaque apparatus alfo, as above deferibed, is applicable this way by refledion. It only confifts in turning the arm R (fig. I.), with the magnifier over the concave fpeculum below (fig. 2.), or to receive the light as reflected obliquely from it : the filver fpe¬ culum fcrewed into R will then refleCt the light, which it receives from the glafs fpeculum, ftrongly upon the objeCt that is applied upon the wire T underneath. This microfcope,, however, is not upon the moft convenient conftruCtion,, in comparifon with others:now made: it has been efteemed for many years paft from its popular name, and recommendation by its makers. Its portability is certainly a great advantage in its fa¬ vour ; but in moft refpeCts it is fuperfeded by the mi- crofcopes hereafter deferibed. 3. Microfcope for Opaque Obje&s, called the Single Fig- 3. Oppque Microfcope. This microfcope remedies the in¬ convenience of having the dark fide of an objeCI next the M I C [ Microfcope. tlie eye, which formerly was an infmmountable ob- jedlion to the making obfervations on opaque objcdts with any confiderable degree of exaftnefs or fatisfac- tion : for, in all other contrivances commonly known, the nearnefs of the inftrument to the object (when glaffes that magnify much are ufed') unavoidably over- ihadows it fo much, that its appearance is rendered ob- fcure and indiflindt. And, notwithftanding ways have been tried to point light upon an objedt, from the fun or a candle, by a convex glafs placed on the fide there¬ of, the rays from either can be throtvn upon it in fuch an acute angle only, that they ferve to give a confufed glare, but are infufficient to afford , a clear and perfedt view of the objedt. But this microfcope, by means of a concave fpeculum of filver highly polilhed, in whofe centre a magnifying lens is placed, fuch a ftrong and diredl light is refledfed upon the objedt, that it may be examined with all imaginable eafe and pleafure. The feveral parts of this inftrument, made either of brafs or filver, are as follow. Through the firft fide A, paffes a fine fcrew B, the other end of which is faftened to the moveable fide C. D is a nut applied to this fcrew, by the turning of which the two fides A and C are gradually brought together. E is a fpring of fteel that feparates the two fides wThen the nut is unfcrewed. F is a piece of brafs, turning round in a focket, whence proceeds a fmall fpring tube moving upon a rivet ; through which tube there runs a fteel wire, one end whereof termi¬ nates in a ftiarp point G, and the other writh a pair of . pliers H faftened to it. The point and pliers are to thruft into, or take up and hold, any infedl or objedt ; and either of them may be turned upwards, as beft fuits the purpofe. I is a ring of brafs, with a female fcrew within it, mounted on an upright piece of the fame metalwhich turns round on a rivet, that it may be let at a due riiitance when the leaf! magnifiers are employed. This ring receives the fcrews of all the magnifiers. K is a concave fpeculum of filver, po¬ lilhed as bright as poflible ■, in the centre of which is placed a double convex lens, with a proper aperture to look through it. On the back of this fpeculum a male fcrew L is made to fit the brafs ring I, to fcrew into it at pleafure. Theie are four of thefe concave Ipecula of different depths, adapted to four glaifes of different magnifying powers, to be ufed as the ob- jedis to be examined may require. The greateft mag¬ nifiers have the leaft apertures. M is a round objedt- plate, one fide of which is w’hite and the other black : The intention of this is to render objedfs the more vi- fible, by placing them, if black, on the white fide, or, if white, on the black fide. A feel fpring N turns dowm on each fide to make any objedf fall; and if- fuing from the objedl-plate is a hollowr pipe to fcrew it on the needle’s point G. O is a fmall box of brafs, with a glafs on each fide, contrived to confine any liv¬ ing objedl, in order to examine it : this alfo has a pipe to fcrew upon the end of the needle G. P is a turned handle of wood, to fcrew into the inftrument W’hen it is made ufe of. Q, a pair of brafs pliers to take up any objedl, or manage it with conveniency. R is a foft hair-brufh for cleaning the glaffes, &c. S is a fmall ivory box for talcs, to be placed, when wanted, in the fmall brafs r O. When you would view any objedf with this micro- 3 1 M 1C fcope, fcrew the fpeculum, with the magnifier you Mhrofcope. think proper to ufe, into the brafs ring I. Place your “* objedl, either on the needle G in the pliers H, on the objedl-plate M, or in the hollow brafs box O, as may be moil convenient: then holding up your inftrument by the handle P, look againft the light through the magnifying lens; and by means of the nut D, together wdth the motion of the needle, by managing its lower end, the objedl may be turned about, raifed, or de- preffed, brought nearer the glafs, or removed farther from it, till you find the true focal diflance, and the light be feen ftrongly refledled from the fpeculum up¬ on the objedt, by which means it will be fhown in a manner lurprifingly diftindt and clear} and for this purpofe the light of the fky or of a candle w ill anfwer very well. Tranfparefit objedts may alfo be viewed by this microfcope ; only obferving, that when fuch come under examination, it will not always be proper to throw on them the light refledled from the fpeculum j for the light tranfmitted through them, meeting the refledted light, may together produce too great a glare. A little pradtice, however, will fhow how to regulate both lights in a proper manner. 4. Ellis'1 s Jingle and Aquatic Microfcope. Fig. 4. re-Fig. 4, prefents a very convenient and uleful microfcope, con¬ trived by Mr John Ellis, author of An Effay upon Co-* rallines, &c. To pradlical botanifts, obfervers of ani- malcula, &c. it poffeffes many advantages above thofe juft deferibed. It is portable, fimple in its conftruc- tion, expeditious, and commodious in ufe. K re- prefents the box containing the whole apparatus : it is generally made of filh-lkin ; and on the top there is a female fcrew, for receiving the fcrew that is at the bottom of the pillar A : this is a pillar of brafs, and is ferewed on the top of the box. D is a brafs pin which fits into the pillar ; on the top of this pin is a hollow' focket to receive the arm w’hich carries the magnifiers ; the pin is to be moved up and down, in order to adjuft the lenfes to their focal or proper di- ftance from the objedl. [A. B. In the reprefenta- tions of this microfcope, the pin _D is delineated as palling through a focket at one fide of the pillar A j whereas it is ufual at prefent to make it pafs down a hole bored through the middle of the pillar.] E, the bar which carries the magnifying lens \ it fits into the focket X, which is at the top of the pin or pillar D. This arm may be moved backwards and forwards in the focket X, and fideways by the pin D j fo that the magnifier, which is ferewed into the ring at the end E of this bar, may be eafily made to traverfe over any part of the objedt that lies on the ftage or plate B. FF is a polilhed filver fpeculum, with a magnifying lens placed at the centre thereof, which is perforated for this purpofe. The filver fpeculum fcrews into the arm E, as at F. G, another fpeculum, with its lens, w'hicli is of a different magnifying power from the former. H, the femicircle which fupportsthe mirror 1 •, the pin R, affixed to the femicircle H, paffes through the hole which is towards the bottom of the pillar A. B, the ftage, or the plane, on which the objedts are to be placed ; it fits into the fmall dove tailed arm which is at the upper end of the pillar DA. C, a plane g’afs, with a fmall piece of black filk ftuck on it 5 this glafs is to lay in a groove made in the ftage C. M,' a hollow glafs to be laid occafionally on the ftage m- A 2 ftead MIC [ < Micrbfcope. ftead of the plane glafs C. L, a pair of nippers. ' v Thefe are fixed to the ftage by the pin at bottom ; the fteel wire of thefe nippers Hides backwards and forwards in the focket, and this focket is moveable upwards and downwards by means of the joint, fo fchat the pofition of the .objeft may be varied at pleafure. The object may be fixed in the nippers, ftuck on the point, or affixed, by a little gum-water,. &c. to the ivory cylinder N, which occafionally fcrews to the point of the nippers. „ To «/ethis microfcope : Take all the parts of the ap¬ paratus out of the box ; then begin by fcrewing the pillar A to the cover thereof 5 pais the pin R of the femicircle which carries the mirror through the hole that is near the bottom of the pillar A; puffi the ftage into the dove-tail at B, Aide the pin into the pillar (fee the N. B. above) j then pafs the bar E through the focket which is at the top of the pin D, and fcrew one of the magnifying lenfes into the ring at F. The mi . crofcope is nowr ready for ufe : and though the enumer¬ ation of the articles may lead the reader to imagine the inftrument to be of a complex nature, we can fafely affirm that he will find it otherwife. The inftrument has this peculiar advantage, that it is difficult to put any of the pieces in a place which is appropriated to an¬ other. Let the objedl be now placed either on the ftage or in the nippers L, and in fuch manner that it may be as nearly as poffible over the centre of the ftage: bring the fpeculum F over the part you mean to 6b- ferve ; then throw as much light on the fpeculum as you can, by means of the mirror I, and the double mo¬ tion of which it is capable ; the light received on the ipeculum is reflefted by it on the objedh The diftance 6f the lens F from the objeft is regulated by moving the pin D up and down, until a diftinft view of it is obtained. The belt rule is, to place the lens beyond its focal diftance from the objeft, and then gradually to Aide it down till the objeft appears ffiarp and well defined. The adjufiment of the ienfes to their focus, and the diftribution of the light on the objeft, are what require the moft attention : on the firft the di- ftinftnefs of the vifion depends j the pleafure arifing from a clear view of the parts under obfervation is due to the modification of the light. No precife rule can be given for attaining accurately thefe points; it is from practice alone that ready habits of obtaining thefe neeeffary properties can be acquired, and with the affiftanc? of this no difficulty will be found. 5. A very fimple and convenient microfcope for botanical and other purpofes, though inferior in many refpe&s to that of Mr Ellis, w7as contrived by the ingenious Mr Benjamin Martin, and is reprefented at -yjg fig. 5. where AB reprefents a fmall arm fupporting two or more magnifiers, one fixed to the upper part as at B, the other to the lower part of the arm at C ; thefe may be ufed feparately or combined together. The arm AB is fupported by the fquare pillar IK, the lower end of which fits into the focket E of the foot FG ‘y the ftage DL is made to Aide up and down the fquare pillar $ H, a concave mirror for reAe&ing light on the objeft.—To ufe this microfcope, place the objeft on the Aagc, reAedt the light on it from the concave mirror, and regulate it to the focus, by moving the ftage nearer to or farther from the lens at B. The ivory Aiders pafs through the ftage} other objects may ] MIC be fixed in the nippers MN, and then brought under Micmfccpe. the eye-glafles; or they may be laid on one of the sr-** glaffes which fit the ftage. The apparatus to this in¬ ftrument confifts of three ivory Aiders j a pair of nip¬ pers j a pair of forceps •, a fiat glafs and a concave ditto, both fitted to the ftage. The two laft microfcopes are frequently fitted up with a toothed rack and pinion, for the more ready adjufiment of the glafies to their proper focus. 6. Withering's portable Botanic Microfcope. Fig. 6. Fig. <$. reprefents a fmall botanical microlcope contrived by L)r Withering, and deferibed by him in his Bota¬ nical Arrangements. It con lifts of three brafs plates, ABC, which are parallel to each other $ the wires D and E are rivetted into the upper and lower plates, which are by this means united to each other j the middle plate or ftage is moveable on the aferefaid wares by two little fockets which are fixed to it. The two upper plates each contain a magnifying lens, but of difierent powers ; one of thefe confines and keeps in their places \he fine point F, the forceps G, and the fmall knife H.—To ufi this inftrument, unferew the upper lens, and take out the point, .the knife, and the forceps j then fcrew the lens on again, place the ob- jedV on the ftage, and then move it up or down till you have gained a diftinft view of the obje. N of the body. The fecond piece is the concave fpecu- lum h ; this is to be fcrewed to the lower end of the aforefaid tube : the upper edge of this tube fhould be made to coincide with the line which has the fame num¬ ber affixed to it as to the magnifier you are ufing j e. g. if you are making ufe of the magnifier marked 5, Aide the tube to the circular line on the tube N that is marked alfo with N0 5. The Aider-holder ftiould be removed when you are going to view opaque ob- jedls, and a plane glafs Ihould be placed on the ftage in its ftead to receive the objedl; or it may be placed in the nippers, the pin of which fits into the hole in- the ftage. The apparatus belonging to this microfcope confifts of the following particulars : viz. Five magnifiers, each fitted in a brafs button ; one of thefs is feen at N, fig. 10. Six ivory Aiders, five of them with objedts. A brafs tube, to hold the concave fpeculum. The concave fpeculum in a brafs box. A filh pan. A fet of glafs tubes. A flat glafs fitted to the ftage. A concave glafs fitted to the ftage. A pair of forceps. A.fteel wire, with a pair of nippers at one end and a point at the other. A fmall ivory cylinder, to fit on the pointed end of the aforefaid nippers. A convex lens, moveable in a brais femicircle ; this is affixed to a long brafs pin, which fits into a hole on the ftage. T he conftrudlion of the foregoing microfcope is very Ample, and it is eafy in ufe; but the advantages of the ftage and mirror are too much confined for an extenfive application and management of all kinds of objedts. Its greateft recommendation is its cheapnefs ; and to thofe who are defirous of having a compound microfcope at a low price, it may be acceptable. 2. Cuff's Microfcope. The improved microfcope next in order is that of Mr Cuff. Befides remedying the difadvantages above mentioned, it' contains the additipa- M I C [ Microfcope. addition of an adjuiling ferew, “which is a confider- v able improvement, and highly necefl'ary to the ex¬ amination of objeffs under the belt defined appear- Fig. ii. ance from the glaffes. It is reprefented at fig. 11. with the apparatus that ufually accompanies it. A- J3, C, Ihows the body of this microfcope ; which contains an eye-glafs at A, a broad lens at B, and a magnifier which is fcrewed on at C. The body is fupported by the arm DE, from which it may be removed at pleafure. The arm DE is fixed on the Hiding bar F, and may be raifed or depref- fed to any height within its limits. The main pil¬ lar a b \s fixed in the box be; and by means of the brafs foot d is fcrewed to the mahogany pedellal XY, in which is a drawer containing all the apparatus. G is a milled-headed fcrew, to tighten the bar F when the adjuiling fcrew eg is ufed. /» O’ Is the ftage, or plate, which carries the objefls j it has a hole at the centre n. G, a concave mirror, that may be turned in any dire&ion, to refleft the light of a candle, or the fky, upon the objecl. To ufe this microfcope : Screw the magnifier you intend to ufe to the end C of the body j place the flider-holder P in the hole «, and the Aider with the objedt between the plates of the flider-holder ; fet the upper edge of the bar DE to coincide with the di- t^fions which correfpond to the magnifier you have in ufe, and pinch it by the milled nut ; now refleft a proper quantity of light upon the objeft, by means of the concave mirror G, and regulate the body ex- a£Uy to the eye and the focus of the glaffes by the adjulting fcrew cg. To view opaque obje&s, take away the flider-holder P, and place the object on a flat glafs under the cen¬ tre of the body, or on one end of the jointed nippers op. Then fcrew the filver concave fpeculum h to the end of the cylinder L, and Hide this cylinder on the lower part of the body, fo that the upper edge thereof may coincide with the line which has the fame mark with the magnifier that is then ufed : refledl the light from the concave mirror G to the filver fpeculum, from which it will again be refle&ed on the objed. The glaffes are to be adjufted to their focal diflance as before direded. The apparatus confifts of a convex lens H, to col¬ led the rays of light from the fun or a candle, and con den fe them on the objed. L a cylindrical tube, open at each fide, with a concave fpeculum fcrewed to the lower end h. P the flider-holder : this confifts of a cylindrical tube, in which an inner tube is forced up¬ wards by a fpiral fpring } it is ufed to receive an ivory Aider K, which is to be Aid between the plates h and i. The cylinder P fits the hole n in the ftage ; and the hollow part at h is defigned to receive a glafs tube. R is a brafs cone, t6 be put under the bottom of the cylinder P, to intercept occafionally fome of the rays of light. S, a box containing a concave and a flat glafs, between which a fmall living infed may be confined : it is to be placed over the hole n. T a flat glafs, to lay any occafional objed upon ; there isjsho a concave one for fluids. O is a long fteel wire, wdth a fmall pair of pliers at one end, and a point at the other, defigned to rtick or hold objeds : it flips backwards and forwards in the Ihort tube o; the pin />-fits into 'the hole of the ftage. W, a little round 6 ] MIC ivory box, to hold a fupply of talc and rings for the Microfcope. Aiders. V, a fmall ivory cylinder, that fits on the “ pointed end of the fteel wire : it is deligned for opaque objeds. Light-coloured ones are to be ftuck upon the dark fide, and vice verfa, M, a fiih pan, v/hereon to fafh n a fmall fith, to view the circulation of the blood : the tail is to be fpread acrofs the oblong hole k at the fmall end, and tied fart, by means of a rib¬ band fixed thereto j the knob / is to be ftiovcd through the flit made in the ftage, that the tail may be brought under the magnifier. 3. This microfcope has received feveral material im¬ provements fiom Mr Martin, Mr Adams, &c. By an alteration, or rather an enlargement, of the body of tire tube which contains the eye-glaffes, and ai!o of the eye glaffes themlelves, the field of view is made much larger, the mirror below' for refleding light is made to move upon the lame bar with the ftage j by w'hich means the diftance of it from the ftage may be very eafily and fuitably varied. A condenfing glafs is applied under the ftage in the flider-holder, in order to modify and increafe the light that is refleded by the mirrors be¬ low from the light of a candle or lamp. It is furnilh- ed alfo with two mirrors in one frame, one concave and the other plane, of glafs filvered ; and by limply unferewing the body, the inftrument, w'hen defired, may be converted into a fingle microfcope. Fig. 12. is a Fig. n. reprefenta ion of the inftrument thus improved j and the following is the defeription of it, as given by Mr Adams in his Effays. AB reprefents the body of the microfcope, con¬ taining a double eye glafs and a body-glafs : it is here Iho vn as fcrewed to the arm CD, from whence it may be occafionally removed, either for the conve¬ nience of packing, or when the inftrument is to be ufed as a fingle microfcope. The eye-glaffes and the body-glaffes are contained in a tube which fits into the exterior tube AB j by pulling out a little this tube when the microicope is in ufe, the magnifying power of each lens is increaled. The body AB of the microfcope is fupported by the arm CD ; this arm is fixed to the main pillar CF, which is fcrewed firmly to the mahogany pedeftal GH 5 there is a drawer to this pedefial, which holds the apparatus. NIS, the plate or ftage which carries the flider-holder KL : this ftage is moved up or down the pillar CF, by turning the milled nut M ; this nut is fixed to a pinion, that works in a toothed rack cut on one fide of the pil¬ lar. By means of this pinion, the ftage may be gradu¬ ally raifed or depreffed, and the objetft adjufted to the focus of the different lenfes. KL is a flider-holder, which fits into a hole that is in the middle of the fiage NIS ; it is ufed to confine and guide either the motion of the Riders which contain the objefts, or the glafs tubes that are defigned to confine fmall fifties for viewing the circulation of the blood. The Aiders are to be paffed between the two upper plates, the tubes through the bent plates. L is a brafs tube, to the upper part of which is fixed the condenfing lens before fpoken of; it fits into the under part of the flider-holder KL, and may be fet at different diftances from the objedl, according to its di¬ flance from the mirror or the candle. O is the frame which holds the two refle£ling mir- MIC [ Microfcope. ror?, one of which is plane, the other concave. Thefe 'v mirrors may be moved in various diredlions, in order to reflect the light properly, by means of the pivots on which they move, in the femicircle Q^SR, and the motion of the femicircle itfelf on the pin S : the con¬ cave mirror generally anfwers bell in the day-time ; the plane mirror combines better with the condenfing lens, and a lamp or candle. At D there is a focket for receiving the pin of the arm £) (fig. 31.), to which the concave Ipeculum, for refledding light on opaque objefls, is fixed. At S is a hole and flit for receiving either the Plate nippers L (fig. 31.) or the fifh-pan I ; when thefe are CCCXLI. ufed, the Aider-holder muff be removed. 7’, a hole to fig-3i> receive the pin of the convex lens M. To ufe this microfcope : Take it out of the box. Screw the body into the round end of the upper part of the arm CD. Place the brafs Aiders, which con¬ tain the magnifiers, into the. dove-tailed flit which is on the under fide of the aforefaid arm, as feen at E, and Aide it forwards until the magnifier you mean to ufe is under the centre of the body : oppofite to each magnifier in this flit there is a notch, and in the dove-tailed part of the arm CD there is a fpring, which falls into the above-mentioned notch, and thus makes each magnifier coincide with the centre of the body. Pafs the ivory Aider you intend to ufe between the upper plates of the Aider-holder KL, and then refledt as ftrong a light as you can on the fubjedf by means of one of the mirrors j after this, adjuft the ob¬ ject to the focus of the magnifier and your eye, by turning the milled fcrewT M, the motion of which raifes and depreffes the' flage NIS. The degree of light, neceffary for each objedl, and the accuracy required in the adjuftment of the lenfes to their proper focal di- ftance from the objedf will be eafily attained by a little practice. When opaque objedls are to be examined, remove the Aider-holder, and place the objedf on a fiat glafs, or fix it to the nippers L, the pin of thefe fit into the hole on the fiage ; fcrew the concave fpeculum R into the arm £) (fig. 31.), and then pafs the pin of this arm through the focket D (fig. 1 2.) •, the light is now' to be refledled from the concave mirror to the filver fpe- eulum, and from this down on the objedl. No exadf rule can be given for refiedling the light on the object j we mufi therefore refer the reader to the mother of all aptnefs, pradlice. The fpeculum muft be moved lower or higher, to fuit the focus of the different magnifiers and the nature of the objedl. The foregoing direbtions apply equally to the ufing of this inffrument as aJtn^/e microjcope; with this dif¬ ference only, that the body AB is then removed, and the eye is applied to the upper furface of the arm CD, exactly over the magnifiers. This microfcope is lometiraes made with the follow'- - ing. alterations, which are fuppofed to make it (till more convenient and ufeful. The arm CD that car¬ ries the body and magnifiers is made both to turn on a pin, and to Aide backwards and forwards in a focket at C ; fo that, inflead of moving the objedts below' on the fiage, and dilturbing them, the magnifiers are more conveniently brought over any part of the objects as defired. The condenfing glafs is made larger, and Aides upon the fqnare bar CF quite difiinct from the ffage, like the mirrors below 5 and id is thereby made 7 ] MIC ufeful for any other objedls that may be applied on Microfcope. glafles fitted to the fiage, as well as thofe put into —-v ~~'1 the Aider-holder K. It is thereby not confined to this ftage alone as in the preceding. When the body AB is taken away, the arm CD may be flipt away from its bar, with the magnifiers, and the for¬ ceps, w’ire, and joint, applied to it j and it there¬ by ferves the purpofe of a fmall fingle or opaque hand microfcope, for any objedl occafionally applied to this wfire. The magnifiers in the Aider E are mounted in a wheel cafe, w'hich perhaps prevents its being in the way fo'much as the long Aider E before defcribed.—This contrivance is reprefented at X, fig. 12. 4. Martin's New Vniverfal Compound Microfcope.— This inffrument was originally conftrubfed by Mr B. Martin, and intended to comprife all the ufes and ad¬ vantages of the fingle, compound, opaque, and aquatic microfcopes. The following is a defcription of it. Fig. 12. is a reprefentatioa of the inftrument pla- Plate ced up for ufe. ABCD is the body of the micro- gg fcope : which confifts of four parts, viz. AB the eye¬ piece, or that containing the eye-glaffes, and is fcrew- . ed into C, which is a moveable or Hiding tube on the top } this inner tube contains the body-glafs fcrewed into its low'er part. D is the exterior tube or cafe, in which the other Aides up and down in an eafy and fleady manner. This motion of the tube C is ufeful to increafe and decreafe the magnifying power of the body-glafs when thought neceflary, as before mention¬ ed. E is a pipe or fnout fcrewed on to the body of the microfcope D, and at its lower part, over the feveral magnifying lenfes hereafter defenbed. FGFII is the fquare ftem of the microfcope, upon which the ffage R moves in an horizontal pofition, upwards or downward, by means of the fine rack-w’ork of teeth and pinion. KL is a ftrong folid joint and pillar, by which the pc- fition of the inftrument is readily altered from a vertical one to an oblique or to a perfectly horizontal one as may be required : it is thus well adapted to the eafe of the obferver either fitting or (landing •, and as it is very often convenient to view objects by direft unreflefl- ed light, when the fquare ftem FI is placed in a horizontal pofition for this purpofe, the mirror T is then to be taken off in order to prevent the obftruc- tion of the rays. M is a circular piece of brafs, ferv- ing as a bafe to the pillar. NOP, the tripod or foot by which the whole body of the microfcope is ftea- dily fupported ; it folds up w'hen packed into the cafe. W is a brafs frame, that contains the condenfing lens, and a£ls in conjumftion with the large concave and plane mirrors below at T ; the reflected rays from which, either of the common light or of that of a candle or lamp, it agreeably modifies, and makes ffea- dy in the field of view. The particulars of the apparatus to tins microfcope are as follow- : P is a circular br.ls box, containing fix magnifiers or obiedd lenfes, numbered r, 2, 3, 4, 5, 6 ; the digits of which appear feverally through a fmall round hole in the upper plate of it. To tlie upper fide is fixed a fmall circle of br.tb, by vnich it is connected with, and fcrewed into, the round end of the arm abed; which is a long piece of brafs, ?nd moves through, either by teeth or pinion, or not, as nay be defi ed, in ef; which is a focket on the upper part of the pillar, and admits, w-ith a motion both ealy and heady, the brais %• I4* -MIG [ Microfcope. braFs arns.* R is a fixed fiage, upon which the objedts ’ to be viewed are to be placed : it is firmly faftened to the fquare pillar, which is moved by the rack-work. In the middle is a large circular hole, for receiving concave glafles, with fluids, &c. it has alfo a Aiding fpring frame to fafien dowm flips of glafs or other thing*: at abc are three imall fockets or holes, intended to receive feveral parts of the apparatus. S is the refrac¬ tor, or illuminating lens, for converging the fun’s rays upon opaque objects laid upon the fiage R. To this purpofe it moves on a femicircle upon a long fliank g, in a fpring focket h, in the arm i ; this arm moving every-way by a flout pin h in the focket a of the ftage. In this manner it is eafily adjulled to any pofition of the fim,. candle, &.c.—T, the refledling glafs frame, con¬ taining a concave and plane fpeculum, which is moved upon the fquare pillar by the hand. The ufe of it is to illuminate all tranfparent objects that are applied to the ftage above. Fig. 14. N° i. is an auxiliary moveable ftage ; which by means of a pin h is placed in the hole a of the ftage xv, and can be moved in a horizontal direftion over the wThole field of the ftage. In this ftage, there are three circular holes with fliouldered bottoms j a large one in the middle, and on each fide a fmall one, for the reception of the three following neceffary articles: N® 2. a watch-glafs to be placed in the large hole, to hold fluids containing animalcules, &c. ; a circular piece of ivory, N°3. one fide of which is black, the other white, to fupport opaque objefls of different contra fled colours 5 and circular plane and concave glaffes, N® 4. for extemporaneous tranfparent objetls. —The fame ufe is made of the other fmall hole as of the large one, only in a leffer degree, to receive fmall concave glaffes, plates, &c. N° 5. is the filvered fpeculum, called a LibcrViun, which makes the fingle opaque microfcope, by being icrewed to the Aider abed (fig. 13.) in room of the box . of lenfes. and. the body AE above it. The chief ufe of this is to view very fmall objects ftrongly illu¬ minated near the compounded focus of the mirror l (%• I3*)* N° 6. is the forceps or pliers, for holding fuch kind of objefts, and by which they can be applied very readily to the focus of the lens in the liberkhun. j hey have a motion all wTays by means of the fpring focket a, the joint b, and the fliank c : they are placed in the focket c of the fixed ftage R (fig, 13.). N° 7. is a Imall piece of ivory, to be placed upon the pointed end of the pliers : it is black upon one fide, and white upon the other, to receive opaque objeifls. r •^° 8* is a liberkhun of a larger fize than that iirft mentioned, with a hole in its centre : this is j crewed into N° 9. the hole rt of a brafs ring, fall- cned to a long wire b; wftiich moves up and down in the fpring focket b of the ftage R, in which it al¬ io moves Tideways 5 and thus, with the body AE above, forms an aquatic compound microfcope for fliowin-r all torts of objefts in water and other fluids placed under it m Uie watch-glafs N° /2. on the ftage. i ^ V* JS 3 cone> with a proper aperture a to ex¬ clude fuperfluous light, that wxiuld diftuft) a critical observation of a curious objea 5 it is placed on the under fide of the fixed flage R. N° I2* is what is ufually called a bug-box, confift- 4 3 ] MIC ing of a concave glafs with a plane one ferewed over Microfcope* it j by means of which a bug, loufe, flea, &c. may be v— fee are d and viewed alive. It is to be placed on either of the ftages R (fig. 13.), or N° 1. (fig. 14.). N° 13. is the fiih-pan. In the long concave body ab, a fith may be fo confined by the ribband c, that the tranfparent tail may be in part over the flit or hole at a. In this ftate, it is placed on the ftage R, with the pin d in the hole c of the ftage, and moves free¬ ly and horizontally for viewing the circulation of the blood, &c. N° 14. is the Aider-holder that is placed on the ftage R : it receives the Aiders and tubes w'hen filled with tranfparent objefls, to be viewed either by the com¬ pound or fingle microfcope. N° 15. reprefents the ivory Aider, to hold the objefts between the talcs as ufual. N® 16. is a ufeful auxiliary Aider framed in brafs. In this Aider fmall concave glaffes are cemented j and a flip of plane glafs Aides over them j by wEich any final.! living objeft, as mites, &c. may be confined with¬ out injury, and deliberately viewed. N° 17. reprefents a fet of glafs tubes, three in num¬ ber, one within another;, they are ufeful for fmall tad¬ poles, water newts, eels, &c. when the circulation of the blood is to be viewed. There is a fmall hole at one end of each tube, that ferves to admit the air 5 for when they are filled with water, the other end is flop¬ ped wflth a cork. N° .i8. is a fmall ivory box, containing fpare talcs and wires, to fupply the Aiders with occafionally. N° 19. a brafs cell or button, containing a very fmall lens,. properly fet between two fmall plates of brafs, that it may be brought very near to the objeft when viewed therewith as a fingle microfcope. This magnifier is ferewed into the fame hole as the wheel of fix magnifiers are (fig. 13.). N 20. is a lens, adapted to view and examine ob- jeds, by magnifying them fufficiently, fo as to be able to apply them to the microfcope for infpeflion : on this account it is called the explorator. The preceding are the chief articles of the appara¬ tus : which, on account of their being fomewhat dif¬ ferent from what is applied to other microfcopes, we have been thus particular in deferibing. In ufing the micioicope, and wEile viewing objects by either the fingle or compound inflrument, the focal diftances of the magnifiers are made perfe&ly exa& by turn¬ ing of the pinion at the nut u>, in one way or the other, very gently in the teeth of the rack-work at X (fig. 13.). It is neceffary that the centres of the objea ienfes or magnifiers, the ftage, and the mirrors at bot¬ tom, fhould all be in a right line in the axis of the microfcope, when opaque objeds are to be viewed, that are placed upon the ivory piece N° 7. or the for¬ ceps N 6. and all other fuch lort of obje£ls which are placed in the centre of the ftage R, or Aider-holder N°_ 1 4: But when aquatic or living objefts, which re¬ quire a great fpace to move in, are to be viewed, then the horizontal motion at hlartin made icveral elfays towards the under plate, and forces it againft the upper one conltruftion of fach an inilrument; and at lad com- The Aider S (under fig. 24.), which contains the pleted one about the time juft mentioned, which he magnifiers, fits into the hole -v;- and any of the magni- na™eTd’ _ r* / 7i>f** r „T. , . fiers may be placed before the objeift, by moving ^the i.i. J ie Qpaqus Solar Microfcope. With this m- a fore faid Aider: when the magnifier is at the centre of ftrument (to ufe his own words) “ all opaque objefts, the hole P, a fmall fpring falls into one of the notches whether of the animal, vegetable, or mineral king- which is on the fide of the Aider. dora, may be exhibited in great perfeaion, in all their Under the plate m are placed two lenfes, for en- native beauty •, the lights and ftiades, the prominences larging the field of view on the fcreen : the fmaller of and cavities, and all the varieties of different hues, the two is fixed in a piece of brafs, and is neareft the tints, and colours; heightened by retleclion of the fo- plate m ; this is to be taken out when the magnifiers lar rays condenfed upon xhtm.—Tranfparent objeBs N° 4, 5, or 6, are ufed, or when the megalafcope lens are alio ftiown with greater perfedion than by the com- T (fig. 24.) is ufed ; but is to be replaced for xnon folar microfcope. K° t 2 1 Fig. 24. reprefents the folar opaque microfcope, mounted for exhibiting opaque objeds. Fig. 25. is the fingle tooth and pinion microfcope, as before, which is ufed for Aiowing tranfparent objedls j the cylindrical tube Y thereof being made to fit into the tube FE of the iolar microfcope* ABCDEF, (fig. 24.) reprefents the body of the folar microfcope 5 one part thereof, A'BCD, is coni¬ cal ; the other, CDEF, is cylindrical. The cylindri¬ cal part receives the tube G of the opaque box, or the tube Y of the fingle microfcope. At the large end AB of the conical part, there is a lens to receive the rays from the mirror, and refrad them towards the box HIKE. NOP is a brafs frame; which is fixed to the moveable circular plate ah c: in this frame there is a plane mirror, to reded the folar rays on the afore¬ mentioned lens. This mirror may be moved into the moft convenient pofition for refleding the light, by means of the nuts Q and R. By the nut £) it may be moved from eaft to weft; and it may be elevated or depreffed by the nut R. d e, Two fcrews to fallen the microfcope to a window (butter. The box for opaque ohjeds is reprefented at KIEL : it contains a plane mirror M, for rededing the light which it receives from the large lens to the objed, and thereby illuminating it ; S is a ferew to adjuft this mirror, or place it at a proper angle for rededing the light. VX, two tubes of brafs, one Hiding within the other, the exterior one in the box HIKE ; thefe carry the magnifying lenfes : the interior tube is fometimes taken out, and the ex- teiior one is then ufed by itfelf. Part, of this tube may be feen in the plate within the box HIKE. At H there is a brafs plate, the back part of which is fixed to the hollow tube //, in which there is a fpiral wire, which keeps the plat? always bearing againft the fide H of the brafs box HIKE. The Aiders, with the opaque objeds, pafs between this plate and the fide of the box ; to put them there, the plate is to be drawn back by means of the nut g : ik is a door to one fide of the opaque box. The foregoing pieces conftitute the feveral parts neceffary for viewing opaque objeds. We (hall now proceed to deferibe the fingle microfcope, which is ufed for tranfparent objeds : but in order to examine thefe, the box HIKE muft be firft removed, and in its place we muft infert the tube Y of the fingle tnicrofccpe that we are now going to deferibe. This microfcope is adjufted to the focus by turnincr the milled nut O. To vfe the folar microfcope :—Make round hole in the window (hotter, a little larger than the circle abc; pafs the mirror ONP through this hole, and apply the fquare plate to the (hutter ; then mark with a pencil the places which correfpond to the two holes through which the ferew is to pafs ; take away the mi¬ crofcope, and bore two holes at the marked places, fuf- ficiently large to let the milled fcrews de pafs through them. 0 The fcrews are to pafs from the outfide of the (Imt- ter, to go through it and being then ferewed into their refpedive holes in the fquare plate, they will, when ferewed home, hold it faft againit the infide of the (hutter, and thus fupport the microfcope. Screw the conical tube ABCD to the circle a 3 r, and then Aide the tube G of the opaque box into the cylindrical part CD EF of the body, if opaque objeds are to be examined ; but if they be tranfparent objeds you mean to fhow, then place the tube Y within the tube CDEF. f he room is to be darkened as much as podible, that no light may enter but what paffes through the body of the microfcope; for, on this circumftancev, together with the brightnefs of the funfhine, the per¬ fedion and diftindnefs of the image in a great meafure depend. When the microfcope is to be ufed for opaque ob¬ jeds, 1. Adjuft the mipror'NOP, fo as to receive the folar rays, by, means of the two finger ferews or nuts, QR ; the fiift, O, turns the mirror to the right or left; the fecond, R, raifes or depreffes it: this you are to do till you have rededed the fun’s light through the lens at AB ftrongly upon a fcreen of white paper placed at icme didance from the window, and formed thereon a round fpot of light. An unexperienced ob- ferver will find it more convenient to obtain the light by forming this fpot before he puts' on either the - opaque box or the tomb and pinion microfcope. Now put in the opaque box, and place the objed: between the plates at II; open the door z'e, and ad¬ juft the mirror M till you have illuminated the objed ftrongly. If you cannot effed this by the ferew S, you muft move the fcrews £), R, in order to get the light rededed ftrongly from the mirror NOP, or the • MIC • ' [ i Microfcope. mirror M, without which the latter cannot illuminate “ the object. The objeft being ftrongly illuminated, fhut the door i hy and a diftinft view of the object will foon be obtained on your fcreen, by adjufting the tubes VX, which is effected by moving them backwards or for¬ wards. A round fpot of light cannot always be procured In northern latitudes, the altitude of the fun being often too low $ neither can it be obtained when the fun is dire&ly perpendicular to the front of the room. As the fun is continually changing its place, it will be neceffary, in order to keep his rays full upon the objeft, to keep them continually direded through the axis of the inftrument, by the two fcrews £) and R. To view tranfparent objeds, remove the opaque box, and infert the tube Y, fig. 25* in its place 5 put the Aider S into its place at //, and the Aider with the ob- jeds between the plates at m; then adjuft the mirror NOP, as before direded by the fcrew's Q, R, fo that the light may par3 through the objed j regulate the focus of the magnifier by the fcrewT O. The moft pleafing magnifiers in ufe are the fourth and fifth. . The fize of the objed may be incteafed or dimi- nilhed, by altering the diftance of the fcreen from the microfcope: five or fix feet is a convenient diftance. To examine tranfparent objeds of a larger fize, or to render the inftrument what is ufually called a mega- lafcope, take out the Aider S from its place at w, and • fcrew the button T (fig. 24.) into the hole at P, fig. 25. and remove the glafs which is under the plate at m, and regulate the light and focus agreeable to the foregoing diredions. N. R. At the end of the tube G there is a lens for increafing the denfity of the rays, for the purpofe of burning or melting any combuftible or fufible fub- hance : this lens muft be removed in moft cafes, left the objeds (hould be burnt. The intenfity of the light is alfo varied by moving this tube backwards or Towards. Apparatus of the Opaque Solar Microfcope. The large fquare plate and mirror; the body of the micro¬ fcope •, the opaque box and its tube j the tooth and pinion microfcope ; the Aider wdth the magnifiers j the megalafcope magnifier j the two fcrew’S and e ; feme ivory Aiders 5 fome Aiders with opaque objeds 3 a brafs frame, with a bottom of foft deal to ftick any ob]e6l on 3 a brafs cylinder K (fig. 31.), for confining opaque objeds. MIC He accordingly fucceeded fo far Plate CCCXLI IV. The Camera Obscura, or Lucernal, Microfcope. The great facility wuth which objeds can be repre- fented on paper or a rough glafs in the camera obfcura, and copies drawn from them by any perfon though unlkilled in drawing, evidently fuggefted the applica¬ tion of the microfcope to this inftrument. The great- eft number of experiments that appear to have" been made with this view, were by Mr Martin and Mr Adams 3 the former of whom frequently applied the mxroicope to the portable camera, and with much cited and entertainment. But thefe inftruments being found to anfwer only with the afliftance of the fun, . r Adanis. chre&ed his experiments to the conftruc- tion of an mftrument of more extended utility, which fiould be equally employed in the day-time and by night. He accordingly fucceeded fo far as to pro-MIcrofcc duce, by candle-light, the images of objeds refraded from a fingle magnifier upon one or two large convex lenfes (of about five inches or upwards in diameter), at the end of a pyramidal ftiaped box, in a very pleaf¬ ing and magnified appearance, fo as to give opaque objeds as w'ell as tranfparent ones the utmoft diftind- nefs of reprefentation 3 but ftill the light of a candle or lamp wTas found generally infufficient to throw the renuifite degree of illumination upon the objeds. The invention of what is called Argand's lamp, within thefe few years offered a complete remedy for this defed, by the intenfity and fteadinefs of its light. This did not cfcape Mr Adams (fon of the former), wrho immedi¬ ately applied it ; and wdio had likewife fo altered and improved his father’s inftrument, both in conftrudion and form, as to render it altogether a different one, and far more perfed and ufeful. The advantages and properties of this excellent¬ ly conceived inftrument are numerous and important. “ -A-s the far greater part of the objeds which fur- round us are opaque (fays our author), and very few are fufficiently tranfparent to be examined by the com¬ mon microfcopes, an inftrument that could be readily applied to the examination of opaque objeds has al¬ ways been a defideratum. Even in the examination of tranfparent objeds, many of the fine and more cu¬ rious portions are loft, and drowned, as it were, in the light which muft be tranfmitted through them 5 while different parts of the fame objed appear only as dark lines or fpots, becaufe they are fo opaque as not to permit any light to pafs through them. Thefe diffi¬ culties, as well as many more, are obviated in the lu- cernal microfcope 3 by which opaque objeds of vari¬ ous fizes may be feen with cafe and diftindnefs-: the beautiful colours with which moft of them are adorn¬ ed, are rendered more brilliant, without changing in the leaft the real tint of the colour 3 and the concave and convex parts retain alfo their proper form. The facility with which all opaque objeds are applied to this inftrument, is another confiderable advantage, and almoft peculiar to itfelf 3 as the texture and configu¬ ration of the more tender parts are often hurt by pre¬ vious preparation, every objed may be examined by this inftrument, firft as opaque, and afterwards (if the texture will admit of it) as tranfparent The lucer- nal microfcope does not in the leaft fatigue the eye 3 the objed appears like nature itfelf, giving eafe to the fight and pleafure to the mind : there is alfo, in the ufe. of this inftrument, no occafion to Ihut the eye which is not direded to the objed. A further ad¬ vantage peculiar to this microfcope is, that by it the outlines of every objed may be taken, even by thofe who are not accuftomed to draw 3 while thofe who can draw well will receive great affiftance, and execute their work with more accuracy and in lefs time than they would otherwife have been able to have perform- ed it. I ranfparent objeds as well as opaque may be copied in the fame manner. The inftrument may be ufed at any time of the day, but the beft effed is by night 3 in which refped it has a fuperiority over the folar microfcope, as that inftrument can only be ufed when the fun (bines. Tranfparent objeds may be examined with the lu- cernal microfcope in three or four different modes, from MIC [ Microfcope. from a blaze of light almofl too great for the eye to bear, to that which is perfeftly eafy to it : And by the addition of a tin lanthorn to the apparatus, may be thrown on a fcreen, and exhibited at one view to a large company, as by the foiar microfcope. We (hall now proceed to the defcription of the in- ftrument and apparatus as given by Mr Adams. Fig. 26. reprefents the improved Lucernal Microfcope, mounted to view opaque obje&s. ABCD is a large mahogany pyramidal box, which forms the body of the microfcope $ it is fupported firmly on the brafs pillar FG, by means of the focket H and the curved piece IK. LMN is a guide for the eye, in order to direft it in the axis of the lenfes ; it confifls of two brafs tubes, one Hiding within the other, and a vertical flat piece, at the top of which is the hole for the eye. The outer tube is feen at MN, the vertical piece is reprefented at LM. The inner tube may be pulled out, or pufh- ed in, to adjuft it to the focus of the glaffes. The vertical piece may be raifed or deprefied, that the hole, through which the objeff is to be viewed, may coin¬ cide with the centre of the field of view ; it is fixed by a milled fcrew at M, which could not be fhown in this figure. At N is a dove-tailed piece of brafs, made to re¬ ceive the dove tail at the end of the tubes MN, by which it is affixed to the wooden box ABCDE. The tubes MN may be removed from this box occafionally, for the convenience of (packing it up in a lefs com- pafs. OP, a fmall tube which carries the magnifiers. O, one of the magnifiers $ it is fcrewed into the end of a tube, which Aides wutbin the tube P ; the tube P may be unfcrewed occafionally from the wooden body. QRSTVX, a long fquare bar, -which pafifes through the lockets YZ, and carries the fiage or frame that holds the objects ; this bar may be moved backward or forward, in order to adjufl it to the focus by means of the pinion wffiich is at a. b, A handle furniffied with an univerfal joint, for more conveniently turning the pinion. When the handle is removed, the nut (fig. 27.) may be ufed in it (lead. de, A brafs bar, to fupport the curved piece KI, and keep the body AB firm and Heady. f g h /, The llage for opaque objecls: it fits upon the bar QRST by means of the focket h i, and is brought nearer to or removed farther from the mag¬ nifying lens by turning the pinion a : the objefts are placed in the front fide of the ftage (wffiich cannot be feen in this figure) between four fmall brafs plates j the edges of two of thefe are feen at k /. The tw o upper pieces of brafs are moveable j they are fixed to. ' a plate, which is a£led on by a fpiral fpring, that prefies them down, and confines the Aider with the cbjebls : this plate, and the two upper pieces of brafs, are lifted up by the fmall nut m. At the lower part of the ftage, there is a femicircu- kir lump of glafs «, which is defigned to receive the light from the lamp, fig. 29. and to colleft and throw it on the concave mirror 0, whence it is to be refie&ed on the objeft. The upper part (fig. 26.) of the opaque ftage 15 ] MIC takes out, that the ftage for tranfparent obje&s may be Microfcope, inferted in its place. v “-,' Fig. 28. reprefents the ftage for tranfparent obje£ts; the tw’o legs 5 and 6 fit into the top of the under part rshi of the ftage for opaque obje&s; 7 is the part which confines or holds the Aiders, and through which they are to be moved ; 9 and 10 a brafs tube, which contains the lenfes for condenfing the light, and throw¬ ing it upon the object ; there is a fecond tube within, that, marked 9 and 10, which may be placed at differ¬ ent diffances from the objc6t by the pin 11. When this Aage is ufed as a Angle microfcope, with¬ out any reference to the lucernal, the magnifiers or objedl lenfes, are to be fcrewed into the hole J2, and to be adjufted to a proper focus by the nut 13. N. B. At the end AB (fig. 26.) of the wooden body there is a Aider, which is reprefented as partly drawn> out at A : wffien quite taken out, three grooves will be perceived*, one of which contains a board that forms the end of the box j the next contains a frame with a grayed glafs *, and the third, or that fartheft from the end AB, tw*o large convex lenfes. Fig. 29. reprelents one of Argand’s lamps, which are the molt fuitable for microfcopic purpofes, on ac¬ count of the clearnefs, the intenfity, and the lleadinefs of the light. The following account of the method, of managing them, with other obfervations, is copied from an account given by Mr Parker w’ith. thofe he fells. The principle on which the lamp a£ls, confiAs in difpofing the wick in thin parts, fo that the air may- come into conta tain, muft be reclined on the back to fill j and this ffiould. MIC [ i (hould be done gently, that the oil in the burner may return into the body when fo placed and filled : if, by being too full, any oil appears above the guard, only move the lamp a little, and the oil will difappear j the lamp may then be placed ere£t, and the oil will flow to proper level. The oil muft be of the fpermaceti kind, commonly called chamber oil, which may generally'be diftinguilh- ed by its palenefs, tranfparency, and inoffenfive fcent : all thofo oils which are of a red and browm colour, and of an offenfive fcent, ftiould be carefully avoided, as their glutinous parts clog the lamp, and the impu¬ rities in fuch oil, not being inflammable, wTill accumu¬ late and remain in the form of a cruft on the wick. Seal oil is nearly as pale and fweet as chamber oil; but being df a heavy fluggilh quality, is not proper for lamps with fine wicks. Whenever bad oil has been ufed, on changing it, the wick muft alfo be changed j becaufe, after having imbibed the coarfe particles in its capillary tubes, it will not draw up the fine oil. To obtain the greateft degree of light, the wick fh’ould be trimmed exactly even, the Hame will then be completely equal. There will be a great advantage in keeping the lamp clean, efpecially the burner and air tubes •, the negledl of cleanlinefs in lamps is too common : a caridleftick is generally cleaned every time it is ufed, fo fhould a lamp ; and if a candleftick is not to be objefted to be¬ caufe it does not give light after the candle is ex- haufted, fo a lamp ftiould not be thought ill of, if it does not give light when it wants oil or cotton : but this laft has often happened, becaufe the deficiency is lefs vifible. The glafs tubes are beft cleaned with a piece of walk leather. If a fountain lamp is left partly filled with oil, it may be liable to overflow : this happens by the con- tradlion of the air when cold, and its expanfion by the warmth of a room, the rays of the fun, or the heat of the lamp when re-lighted : this accident may be effectually prevented by keeping the refervoir filled, the oil not being fubjeft to expanfion like air. On this account, thofe with a common refervoir are beft adapted for microfcopic purpofes. To examine Opaque Objcffs, with the Lucenial Mi- crofcope. To render the ufe of this inftrument eafy, it is ufually packed with as many of the parts together as poffible : it occupies on this account rather more room, but is much lefs embarrafling to the obferver, who has only three parts to put on after it is taken out of its box, namely, the guide for the eye, the ftage, and the tube with its magnifier. But to be more particular : Take out the wooden Aider A (fig. 26 ), then lift out the cover and the gray glafs, from their refpeftive grooves under the Aider A. Put the end N of the guide for the eye LMN into its place, fo that it m#y ftand in the pofition which is xeprefented in this figure. Place the focket which is at the bottom of the opaque ftage, on the bar QXT, fo that the concave mirror 0 may be next the end DE of the wooden body. 6 ] MIC Screw' the tubes PO into the end DE. The mag- Microfcope. nifier you intend to ufe is to be fcrewed on the end O of thefe tubes. The handle G b, or the milled nut, fig. 27. muft be placed on the fquare end of the pinion a. Place the lamp lighted before the glafs lamp «, and the objeft you intend to examine between the fpring plates of the ftage j and the inftrument is ready for ufe. In all microfcopes there are two circumftances which muft be particularly attended to : firft, the modifica¬ tion of the light, or the proper quantity to illuminate the objeft j fecondly, the adjuftment of the inftrument to the focus of the glafs and eye of the obferver. In the ufe of the lucernal microfcope there is a third cir- cumftance, which is, the regulation of the guide for the eye. 1. To throw the light upon the object. The flame of the lamp is to be placed rather below the centre of the glafs lump », and as neap it as poflible j the con¬ cave mirror 0 muft be fo inclined and turned as to re¬ ceive the light from the glafs lump, and refledl it thence upon the objeft j the beft fituation of the con¬ cave mirror and the flame of the lamp depends on a combination of circumftances, which a little pradftice wTill Hifcover. 2. To regulate the guide for the eye, or to place the centre of the eye-piece L fo that it may coincide with the focal point of the lenfes and the axis of vifion : Lengthen and fhorten the tubes MN, by drawing out or puftiing in the inner tube, and raifing or deprefling the eye-piece ML, till you find the large lens (which is placed at the end AB of the wooden body) filled by an uniform field of light, without any prifmatic colours round the edge •, for till this piece is properly fixed, the circle of light will be very (mail, and only occupy a part of the lens ; the eye muft be kept at the centre of the eye-piece L, during the whole of the opera¬ tion } which may be rendered fomewhat eafier to the obferver, on the firft ufe of the inftrument, if he hold a piece of white paper parallel to the large lens, re¬ moving it from or bringing it nearer to them till he find the place where a lucid circle, which he will per¬ ceive on the paper, is brighteft and moft diftinft 5 then he is to fix the cenre of the eye-piece to coincide with that fpot •, after which a very linall adjuftment will fet it perfedlly right. 3. To adjuft the lenfes to their focal diftance. This is effefted by turning the pinidn a, the eye being at the fime time at the eye-piece L. Tire gray glafs is often placed before the large lenfes, while regulat¬ ing the guide for the eye, and ,adjufting for the focal diftance. If the obferver, in the procefs of his examination ef an objedl, advance rapidly from a (hallow to a deep magnifier, he will fave himfelf fome labour by pulling out the internal tube at O. The upper part fgrs of the ftage is to be raifed or lowered occafionally, in order to make the centre of the objeft coincide with the centre of the lens at O. To delineate objefts, the gray glafs muft be placed before the large lenfes j the piflure of the objedt will be formed on this glafs, and the outline may be accu¬ rately taken by going over the pidlure with a pencil. The 3 M I C [ i Microfcope. The opaque part may heufed in the daytime without a lamp, provided the large lenfes at AB are fcreened from the light. To ufe the Lucerr.al Microfcope in the examination of Tranfparent Obje&s.—The inftrument is to remain as before : the upper part fgs cf the opaque ftage muft be removed, and the ftage for tranfparent objedls, re- prefented at fig. 28. put in its place j the end 9 10 to be next the lamp. Place the grayed glafs in its groove at the end AB, and the objects in the flider-holder at the front of the ftage *, then tranfmit as ftrong a light as you are able on the objebt, which you will eafily do by raifing or lowering the lamp. The objeift will be beautifully depicted on the gray glafs : it muft be regulated to the focus of the magni¬ fier, by turning th« pinion a. The objecft may be viewed either with or without the guide for the eye. A Angle obferver will fee an obieS to the greateft advantage by ufing this guide, which is to be adjufted as rve have defcribed above. If two or three wifh to examine the objebb at the fame time, the guide for the eye muft bejaid afide. Take the large lens out of the groove, and receive the image on the gray glafs; in this cafe, the guide for the eye is of no ufe : if the gray glafs be taken away, the image of the objeff may be received on a paper fcreen. Take out the gray glafs, replace the large lenfes, and uie the guide for the eye; attend to the forego¬ ing direbfions, and adjuft the objeft to its proper fo¬ cus. You will then fee the object in a blaze of light almoft too great for the eye, a circumftance that will be found very ufeful in the examination of particular objecls. The edges of the objeft in this mode will be fomewhat coloured : but as it is only ufed in this full * fight f°r occafional purpofes, it has been thought bet¬ ter to leave this fmall imperfection, than, by remedying it, to facrifice greater advantages; the more fo, as this fault is eafily correfled, a new and interefting view of the object is obtained, by turning the inftru¬ ment out of the direct rays of light, and permitting them to pafs through only in an oblique direction, by which the upper furface is in fome degree illumi¬ nated, and the object is feen partly as opaque, partly as tranfparent. It has been already obferved, that the tranfparent objefts might be placed between the Aider- holders of the ftage for opaque obje&s, and then be examined as if opaque. Some tranfparent objedls appear to the greateft ad¬ vantage when the lens at 9 1 o is taken away ; as, by giving too great a quantity of light, it renders the edges lefs (harp. The variety of views which may be taken of every objeft by means of the improved lucernal microfcope, will oe found to be of great ufe to an accurate obferv¬ er : it will give him an opportunity of corre£ling or VOL. XIV. Part I. 7 ] MIC confirming his difeovenes, and inveftigating thofe parts Microf ope. in one mode which are invifible in another. —y—< To throve the image of tranfparent objecis on a fcreen as in the folar microfcope. It has been long a microfco- pical delideratum, to have an inftrument by which the image of tranfparent objects might be thrown on a fcreen, as in the common folar microfcope ; and this not only becaufe the fun is fo uncertain in this cli¬ mate, and the ufe of the folar microfcope requires confinement in the fineft part of the day, when time feldom hangs heavy on the mind ; but as it alfo affords an increafe of pleafure, by difplaying its wonders to feveral perfons at the fame inftant, without the leaft fatigue to the eye. This purpofe is now effe&ually anfwered, by affix¬ ing the tranfparent ftage of the lucernal to a lanthorn, with one of Argand’s lamps.—The lamp is placed within the lanthorn, and the end 9 10 of the tranf¬ parent flage is ferewed into a female ferew, which is rivetted in the Aiding part of the front of the lan¬ thorn ; the magnifying lenfes are to be ferewed into the hole reprefented at 12, and they are adjufted by turning the milled nut. The quantity cf light is to be regulated by raifing and lowering the fiiding-plate or the lamp. apparatus which ufually accompanies the improved Lucernal Microfcope.—The ftage for opaque objects, with its femicircular lump of glafs, and concave mirror. The ftage for tranfparent objects, which fits on the upper part of the foregoing ftage. The Aiding tube, to which the magnifiers are to be affixed : one end of thefe is to be ferewed on the end D of the wooden body ; the magnifier in ufe is to be ferewed to the other end of the inner tube. Eight magnifying lenfes: thefe are fo conftrudled that they may be combined together, and thus produce a very great variety of magnifying powers. A fiffi-pan, Inch as is reprefented at I. A fteel wire L, with a pair of nippers at one end, and a fmall cylinder of ivory l at the other. A Aider of brafs N, containing a fiat glafs Aider, and a brafs Aider into which are fitted fome fmall concave glafies. A pair of forceps. Six large and fix fmall ivory Aiders, with tranfparent objects. Fourteen wooden Aiders, with four opaque objefts in each Aider ; and two fpare Aiders. Some capillary tubes for viewing fmall animalcula. Ingenious men feldom content themfelves with an inftrument under one form ; hence fuch a variety of microfcopes, hence many alterations in the Lucernal Microfcope. Mr Adams himfelf, we underftand, has fitted up this laft in a great many different ways ; and it is reafonable to think that no perfon is more likely to give it every improvement of which it is fufceptible. Ol the alterations by other hands we ffiall only parti¬ cularize one, made by Mr Jones of Holborn (b), whofe defer!ption is as follows : A reprefents a portion of the top of the mahogany C box (b) We .tmft the reader will never confider any paragraph wherein the name of an inftrument-maker or other artift is mferted, as a recommendation of thofe artifts by the editors of this work. In the courfe of a pretty extenfive correfpondence, they have been favoured with very liberal communications from various artifts, for which they are greatly indebted to them : the inferting their names in this work is therefore to be conlidered as MIC [ i Alirrofcopc box in which it packs, to preferve it fteady 5 it Aides V““- jn a dovc-ta]! groove withinfide, a Amilar groove to which is cut in the top of the box A ; fo that when the inftrument is to be ufed, it is dipt out of the box withinfide, and then dipt into the groove at top ready for ufe, almod: infiantly, as fhown in the figure. The adjufiment of the objects is at the Rage JL 5 for the right focal diftance is readily and conveniently made by turning the long fcrew-rod BB, which goes through ihe-two pillars lupporting the box, and works in the bafe of the brafs Rage E; which bate is alio dove¬ tailed, fo as to have a regular and Ready motion in ano¬ ther brafs bafis that fupports it. In this infirument, therefore, the pyramidical box does not move ; but the Rage part only, which, from its fmall weight, moves in the mofl agreeable and Ready manner. While obferving the image of the objeft upon the glafs through the fight-hole at G, the objedl may be moved or changed by only turning the rack-work and pinion applied to the Rage by means of the handle D, for that purpofe. By this contrivance you have no occa- fion to change your pofition during the view of the objefts upon one of the Riders. This motion changes the objefts horizontally only 5 and as they are gene¬ rally placed exactly in one line, it anfwers all the pur- pofes for which this motion is intended very well. But it may fometimes happen that the obferver w-ould wifir to alter the vertical pofition of the objeff ; to perform which there is another plane rod at F, that a£ls limply as a lever for this purpofe, and moves the Riding part of the Rage E vertically either upwards or downwards. Thus, without altering his pofition, the obferver may invefligate all parts of the obje&s in the mod fa- tisfadlory manner. Rack-work and pinion might be applied to the Rage for the vertical motion alfo j but as it would materially enhance the expence, it is fel- dom applied. The brafs wrork at the handle of D contains a Hooke’s univerfal joint. The brilliancy of the images of the objedfs fiiowm upon the large lenfes at the end of the box, being very frequently fo great as to dazzle the eyes, Mr Jones ap¬ plies a Right tinge of blue, green, and other coloured glafs, to the fight-hole at G, which loftens this glare, and cafls an agreeable hue upon the objedfs. Defcription of thofe Parts of a Microfcofcal Appara¬ tus^ common to tnof Infruments, which are delinea¬ ted at fig. 31. A and B reprefent the brafs cells which contain the magnifiers belonging to the different kinds of com¬ pound microfcopes. The magnifier^ are fometimes contained in a Rider like that which is delineated at S (fig. 24.) The lenfes of A and B are confined by a fmall cap ; on unferewing this, the fmall lens may be taken out and cleaned. The magnifiers A of the, lu- eernal microicope are fo contrived, that any tw:o of B ] MIC them may be ferewed together, by which means a con- Mlcrofcope* fiderable variety of magnifying powers is obtained. v' * To get at the lenfes in the Rider S (fig. 24.) take out the two ferews which hold on the cover. C reprefents the general form of the Rider-holder. It confilis of a cylindrical tube, in which an inner tube is forced up by a fpring. It is ufed to receive the ivory or any other Rider, in which the tranfparent objedfs are placed ; thele are to be Rid between the two upper plates : the hollow part in one of the plates is defigned for the glafs tubes. D, the condenfing lens and its tube, which fits into the Rider-holder C, and may be moved up and down in it. When this piece is pufhed up as far as it wall go, it condenfes the light of a candle, which is refledl- ed on it by the plain mirror of the compound micro- fcope, and fpreads it uniformly over the objedt; in this cafe it is beff adapted to the fliallowrefi magnifiers. If the deeper lenfes are ufed, it fliould be drawn dowm, or rather removed further from the objedt, that it may concentrate the light in a fmall compafs, and thus render it more denfe. The; condenfing lens is fome¬ times fitted up differently ; but the principle being the fame, it will be eafy to apply it to ufe notwithRanding fome variations in the mechanifm. E, a brafs cone. It fixes under the Rider-holder, and is ufed to leffen occafionally the quantity of light which comes from the mirror to any objedf. F, a box writh two flat glaffes, which may be placed at different diflances from each other in order to con¬ fine a fmall living infedf. G, a frnall brafs box to hold the filver fpeculum H. H, a fmall filver concave fpeculum, defigned to re- fledt the light from the mirror on opaque objedts j it fliould only be ufed wuth the .(hallow magnifiers. It is applied in different ways to the compound microfcope $ fometimes to a tube fimilar to that reprefented at X, W'hich Rides on the lower part of the body ; fometimes it is ferewed into the ring of the piece ; the pin of this generally fits into one of the holes in the Rage. When this fpeculum is ufed, the Rider-holder (hould be removed. I, a fifli-pan, whereon a fmall fifli may be faRened, in order to view the circulation of the blood : its tail is to be fpread acrofs the oblong hole at the fmalleit end, and tied faR by means of the ribbon fixed there¬ to, by (hoving the knob which is on the back of it through the flit made in the Rage ; the tail of the fish may be brought under the lens which is in ufe. K, a cylindrical piece, intended for the folar opaque microfcope ; by pulling back the fpiral fpring, fmaller or larger objedls may be confined in it. k, A pair of triangular nippers for taking hold of and confining a large objedf. L, a long Reel wire, with a fmall pair of pliers at one end and a Reel point at the other: the wire flips backwards or forwards in a fpring tube, which is af¬ fixed to a joint, at the bottom of which is a pin to fit one as a grateful acknowledgement From the editors (or favoms conferred on them,—not as a teflimonial of their opi¬ nion o the anilities of an individual, or as defigned to infinuate any preference over others in the fame line, where tuch preference, has not been already bedewed by the public.. MIC f j Wicrofcaoe. one of the holes in the ftage ; this piece is ufed to con- s.—< £ne pmau obje^s< /, A fmall ivory cylinder that fits on the pointed end of the fteel wire L ; it is defigned to receive opaque objefts. Light-coloured ones are to be Ituck on the dark fide, and vice verfa. M, a convex lens, which fits to the flage by means of the long pin adhering to it. This piece is defigned to colleft the light from the fun or a candle, and to throw them on any objed placed on the ftage 5 but it is very little ufed at prefent. N, a brafs il der, into which is fitted a flat piece of glals, and a brafs Aider containing four fmall glalfes, one or two of them concave, the others flat j it is de¬ figned to confine fmall living objeds, and when ufed is to be placed between the two upper plates of the Aider- holder. O, a glafs tube to receive a fmall filh, &c. P, reprefents one of the ivory Aiders, wherein ob- jeds are placed between two pieces of talc, and con¬ fined by a brafs ring. £), a piece to hold the fpeculum H : this piece is generally fitted to the microfcope reprefented at fig. 1 2. R, a pair of forceps, to take up any occafional ob- jed. S, a camel’s hair pencil to brufti the duft off the glaffes ; the upper part of the quill is fcooped out, to take up a drop of any fluid, and place it on either of the glaffes for examination. T, an inftrument for cutting thin tranfverfe fedions of wood. It confifts of a wooden bafe, which fup- ports four brafs pillars ; on the top of the pillars is placed a flat piece of brafs, near the middle of which there is a triangular hole. A (harp knife, which moves in a diagonal diredion, is fixed on the upper fide of the afore-mentioned plate, and in fuch a manner that the edge always coincides with the furface thereof. The knife is moved backwards and forwards by means of the handle a. The piece of wood is placed in the triangular trough which is under the brafs plate, and is to be kept fteady therein by a milled fcrew which is fitted to the trough j the wood is to be preffed forward for cutting by the micrometer fcrew b. The pieces of wood ftiould be applied to this in¬ ftrument immediately on being taken out of the ground, or elfe they Ihould be foaked for fome time in water, to foften them fo that they may not hurt the edge of the knife. When the edge of the knife is brought in conta£t with the piece of wood, a fmall quantity of fpirits of wine Ihould be poured on the furface of the wood, to prevent its curling up j it will alfo make it adhere to the knife, from which it may be removed by prefling a piece of blotting 'paper on it. y. An appendage to the cutting engine, which is to be ufed inftead of the micrometer fcrew, being pre- lerred to it by fome. It is.placed over the triangular hole, and kept flat down upon the furface of the brafs plate, while the piece of wood is preffed a>?alnft a cir¬ cular piece of brafs which is on the under fide of it. This circular piece of brafs is fixed to a fcrew, by which its diftance from the flat plate on which the knife moves may be regulated. 9 1 M I C a, An ivory box, containing at one end ip are talcMicro/c pe for the ivory Aiders, and at the other fpare rings for v~—1 prefling the talcs together and confining them to the Aider. I luid microfcopes have been alfo propofed ; the firft, it would appear, was fuggefted by Mr Grey. This was formed of w’ater, and an account of it will be found in N 22i, 223, Phil. 1 ranf. An improved microfcope, on a iimilar principle, has been invented by Mr Biew- fter, of which the following is a defeription, taken from a note by the tranAator of Haiiy’s Natural Philofo- phy. A vertical bar” (fays Mr Gregory), is fixed upon a horizontal pedeftal j and from the top of this bar proceeds a horizontal arm, which fupports a circular cafe containing the lenfes j below this another horizon¬ tal arm Aides up and down, capable of adjuftment by means of a fcrew, and carrying the ufual Aiders to hold the objeff which it is propofed to examine ; and upon the pedeftal. is fixed the frame of a mirror, which has both an inclined and a horizontal motion, in order to illuminate any object upon the Aider. The upper cir¬ cular cafe is hollow, and contains four or more plano¬ convex lenfes, which are conftiiuted each of a drop of very pure and vifeid turpentine varnifh, taken up by the point of a piece of wood, and dropped upon a piece of very thin and well polilhed glafs. The lenfes thus formed may be made of any focal length by taking up a greater or a lefs quantity of fluid. The lower furface of the glafs having been firft fmoked with a candle, the black pigment immediately below the lenfes is then to be removed, fo that no light may pafs but through the lenfes. The piece of glafs is then perforated at its centre, and furrounded by a toothed wheel, which, when the wheel is put in the upper circular cafe, may be turned by a common endlefs fcrew, fo that the fluid lenfes fnall be brought feverally under an eye-aperture properly difpofed, and any obje£l be fuccefsfully exa- ' mined with a variety of magnifying powers.” Note p. 365. See alfo Fergufon’s Ledtures by Brewfter, vol. ii. After what has been related of microfcopes, they cannot be laid to be complete without the valuable ad¬ dition of a micrometer; for the ufe and advantages of which, fee the article Micrometer. Having prefented our readers with deferiptions of the various microfcopes generally ufed, we think it our duty to point out to them thofe which we conceive to be beft calculated to anfwer the purpofes of fcience. The firft which prefects itfelf to our mind is that of FJhs: It is better adapted than any other portable mi¬ crofcope, to the purpofe of general obfervation ; Ample in its conftrudlion, and general in its application. To thofe who prefer a double microfcope, we Ihould recom¬ mend that figured in Plate CCCXXXVIII. fig. 12. If opaque objedts, as infedfs, &c. be fubjedts of inveltiga- tion, the Lucernal Microfcope claims the preference : but if amufement alone guides the choice, the Solar Microfcope mult be fixed upon. We fliall now proceed to explain fome-neceffary par¬ ticulars refpedting the method of ufing micr ftcopes • after which, we lhall fubioin an enumeration, of the prin- C 2 cipal M I C [20 Microfcop? cipal obje&$ diicovered or elucidated by their means, w v— Qn th;, fu'ujecl Mr Adams, in his E/Jay on the Micro- fcope, has been very copious ; with a view, as he in¬ forms us, to remove the common complaint made by Mr Baker, “ that many of thofe who pupchafe micro- fcopes are fo little acquainted with their general and extenfive uiefulnefs, and fo much at a lofs for ob}e6iS to examine by them, that after diverting their friends fome few times with what they find in the Aiders which generally accompany the inftrument, or perhaps with two or three common objedfs, the microfcope is laid afide as of little further value \ whereas no inftru- ment has yet appeared in the world capable of afford¬ ing fo conflant, various, and fatisfadlory an entertain¬ ment to the mind. I. In ufing the microfcope, there are three things ne- ceffary to be conlidered. (i.) The preparation and adjuflment of the inflrument itfelf. (2.) The proper quantity of light, and the befi: method of diredling it to the objedl. (3.) The method of preparing the objedls, fo that their texture may be properly under- flood. 1. With regard to the microfcope itfelf, the firlt ] M I C thing necelfary to be examined is, whether the glaffes be clean or not: if they are not fo, they muft be wiped with a piece of fort leather, taking care not to foil them afterwards with the fingers; and, in replacing them, care muff be taken not to place them in an ob¬ lique fituation. We muft likewife be careful not to let the breath fall upon the glaffes, nor to hold that part of the body of the inflrument where the glaffes are placed with a warm hand ; becaufe thus the moiflure expelled by the heat from the metal will condenfe upon the glafs, and prevent the objedl from being diftindlly feen. The objedl fhould be brought as near the centre of the field of view as poflible ; for there only it will be exhibited in the greatefl perfedlion. The eye fhould be moved up and down from the eye-glafs, of a com¬ pound microfcope, till the fituation is found where the largefl field and mofl diflindl view of the objedl are to be had : but every perfon ought to adjuft the micro¬ fcope to his owm eye, and not to depend upon the lituation it was placed in by another. A fmall magnifying power (hould always be begun with ; by which means the obferver will bell obtain an exadl idea of the fitua¬ tion and connexion of the whole ; and will of confe- quence be lefs liable to form any erroneous opinion when the parts are viewed feparately by a lens of greater power. Objedls fhould fclfo be examined firfl in their mofl natural pofition : for if this be not attended to, we fhall be apt to form very inadequate ideas of the flrudlure of the whole, as well as of the connexion and ufe of the parts. A living animal ought to be as little hurt or difcompofed as poflible. From viewing an objedl properly, xve may acquire a knowledge of its nature : but this cannot be done with¬ out an extenfive knowledge of the fubjedl, much pa¬ tience, and many experiments; as in a great number of cafes the images will refemble each other, though derived from very different fubftances. Mr Baker therefore advifes us not to form an opinion too fuddenly after viewing a microfcopical objedl; nor to draw our inferences till after repeated experiments and examina¬ tions of the objedt in many different lights and pofitions; to pafs no judgement upon things extended by force, or contradled by drynefs, or in any manner out of a na-Microfcojie. tural date, without making fuitable allowances. The " v~— true colour of objedls cannot be properly determined by very great magnifiers ; for as the pores and intei dices of an objedl are enlarged according to the magnifying power of the glafl'es made ufe of, the component parti¬ cles of its fubflance will appear fepar-ated many thou- fand times farther afunder than they do to the naked eye : hence the refledlion of the light from thefe parti¬ cles will be very different, and exhibit different colours. It is likewife fomewhat difficult to obferve opaque ob¬ jedls ; and as the apertures of the larger magnifiers are but fmall, they are not proper for the purpofe. If an objedl be fo very opaque, that no light will pafs through it, as much as poC ble muft be thrown upon the up¬ per furface of it. Some conftderation is likewife ne- ceffary in forming a judgement of the motion of living creatures, or even of fluids, when feen through the microfcope ; for as the moving body, and the fpace wherein it moves, are magnified, the motion will alfo be increafed. 2. On the management of the light depends in a great meafure the diitindtnefs of the vifion : and as, in order to have this in the greateft perfedtion, we muft adapt the quantity of light to the nature of the objedl and the focus of the magnifier, it is therefore necel¬ fary to view it in various degrees of light. In fome objedls, it is difficult to diftinguifh between a promi¬ nence and a deprefhon, a fhadovv or a black ftain : or between a refledlion of light and whitenefs, which is particulaily obfervable in the eye of the libellula and other flies : all of thefe appearing very different in one pofition from what they do in another. The bright- nefs of an objedt likewife depends on the quantity of light, the diftindlnefs of vifion, and on regulating the quantity to the objedl; for fome will be in a man¬ ner loft in a quantity of light fcarcely fufficient to ren¬ der another viiible. 'I here are various ways in which a ftrong light may be thrown upon objedls; as by means of the fun and a convex lens, lor this purpofe, the microfcope is to be placed about three feet from a fouthern window ; then take a deep convex lens, mounted on a femicircle and Hand, fo that its pofition may eafily be varied : place this lens between the objedl and the window, fo that it may colledl a confiderable number of folar ravs, and refradl them on the objedt or the mirror of the microfcope. If the light thus colledled from the fan be too powerful, it may be leflened by placing a piece of oiled paper, or a piece of glafs lightly grayed, be¬ tween the objedl and lens. Thus a proper degree of light may be obtained, and diffufed equally all over the furface of an objedl: a circumftance which ought to be particularly attended to ; for if the light be thrown irregularly upon it, no diftindl view can be obtained, if we mean to make ufe of the folar light, it will be found convenient to darken the room, and to refledt the rays of the fun on the above-mentioned lens by means of the mirror of a folar microfcope fix¬ ed to the window-ftmtter : for thus the obferver will be enabled to preferve the light on his fubjedl, notwith- ftanding the motion of the fun. But by reafon of this motion, and the variable ftate of the atmofphere, fo¬ lar obfervations are rendered both tedious and incon¬ venient ; whence it will be proper for the obferver to be M I C Microfcope.be fur milled with a large tin lanthorn, formed fome- thing like the common magic lanthorn, capable of containing one of Argand’s lamps. This, however, ought not to be of the fountain kind, left the rarefac¬ tion of the air in the lanthorn fiiould force the oil over. There ought to be an aperture in the front of the lanthorn, which may be moved up and down, and be capable of holding a lens j by which means a pleafant and uniform as well as ftrong light may eaftly be pro¬ cured. The lamp ihould likewife move on a rod, fo that it may be ealily raifed or deprelTed. This lan¬ thorn may likewife be ufed for many other purpofes ; as viewing of pidlures, exhibiting microfcopic obje£ls on a fcreen, &c. A weak light, however, is beft for viewing many tranfparent objefts : among which we may reckon the prepared eyes of Hies, as w’ell as the animalcules in fluids. The quantity of light from a lamp or candle may be leflened by removing the mi- crofcope to a greater diftance from them, or by dimi¬ ni Iliing the ftrength of the light which falls upon the objects. This may very conveniently be done by pieces of black paper wnth circular apertures of diffe¬ rent fizes, and placing a larger or fmaller one upon the refleiling mirror, as occafion may require. There is an oblique fituation of the mirrors, which makes like¬ wife jfn oblique reflection of the light eafily difcovered by praCtice, (but for which no general rule can be giv¬ en in theory) 5 and which will exhibit an objeCl more diftinCtly than any other pofltion, ftiowing the furface, as well as thofe parts through which the light is tranf- mitted. The light of a lamp or candle is generally better for viewing microfcopic objeCts than day light j it being more eafy to modify the former than the lat¬ ter, and to throw it upon the objeCts with different de¬ grees of denfity. 3. Swammerdam has excelled in the preparation of objeCts a bn oft all other inveftmators. Neither difficulty nor difappointment could make him abandon the pur- fuit of any objeCt until he bad obtained a fatisfaCtory idea of it. But unhappily the methods he ufed in pre¬ paring his objeCts for the microfcope are now entirely un¬ known. Boerhaave examined with the ftriCteit atten¬ tion all the letters and manufcripts of Swammerdam which he could find ; but his refearches were far from being fuccefsful. The following are all the particulars, which have thus come to the knowledge of the pub¬ lic. For diffeCting fmall infeflx, Swammerdam had a brafs table made by S. Mufchenbroek, to which were affixed two brafs arms moveable at pleafure to any part of it. The upper part of thefe vertical arms was con- ftrucfed in fuch a manner as to have a flow vertical motion •, by which mean* the operator could readily alrer their height as he law convenient. One of thefe arms was to hold the minute objeCts, and the other to apply the microfcope. The lenfes of Swammerdam’s microfcopes were of various fizes as well as foci : but all of them the beft that coifld be procured, both for the tranfparcncy of the glafs and the finenefs of the workmanffiip. His obfervations were always begun with the fmalleft mag¬ nifiers, from which he proceeded to the greateft j but in the ufe of them, he wTas fo exceedingly dexterous, that he made every obfervation fubfervient to that wffiich fucceeded it, and all of them to the coafinnatioti of M I C each other, and to the completing of the defer*ption. M*fcrofcope. His chief art feems to have been in conftru ting feif- ““ * fars of an exquifite finenefs, and making them very fliarp. Thus he was enabled to cut very minute ob¬ jeCts to much more advantage than could be done by knives and lancets; for thefe, though ever fo fharp and fine, are apt to diforder delicate fubftances by dif- placing fome of the filaments, and drawing them af¬ ter them as they pafs through the bodies j but the feiffars cut them all equally. The knives, lancets, and ftyles he made ufe of in his diffeCtions, were fo fine that he could not fee to fharpen them without the affiftance of a magnifying glafs ; but with thefe he could diffeCf the inteftines of bees with the fame ac¬ curacy that the beft anatomifts can do thofe of large animals. He made ufe alfo of very fmall glafs tubes no thicker than a brittle, and drawn to a very, fine point at one end, but thicker at the other. Thefe were for the purpofe of blowing up, and thus render¬ ing vifible the fmalleft veffels which could be difcover¬ ed by the microfcope ; to trace their courfes and com¬ munications, or fometimes to injeCt them with co¬ loured liquors. Swammerdam fometimes made ufe of fpirit of wane, water, or oil of turpentine, for fuffocating the infeCts he wiihed to examine j and would preferve them for a time in thefe liquids. Thus he kept the parts from putrefying, and gave them befides fuch additional ftrength and firmnefs, as rendered the diifeCHons much more eafy than they would otherwife have been. Hav¬ ing then divided the body tranfverfely with the feiffars, and made what obfervations he could with¬ out farther diffeiffion, he proceeded to extradf the inteftines carefully with very fine inftruments, to wafti aw'ay the fat in the like careful manner j and thus to put the parts into fuch a ftate as would beft expofe them to view ; but thefe operations' are beft performed while the infects are in their nympha ftate. Sometimes the delicate vifeera of the infects, after having been fuffocated as above mentioned, were put into water : after which, having fhaken them gently, he procured an opportunity of examining them, efpe- cially the air veffels, which laft he could thus feparate entire from all the other parts, to the admiration of all who beheld them : as thefe veffels cannot be di- ftinffly feen in any other manner, or indeed in any W’ay whatever, without injuring them. Frequently al¬ fo he injected water with a fyringe to cleanfe the parts thoroughly, after which he blew them up with air and dried them ; thus rendering them durable, and fit for examination at s proper opportunity. Sometimes he made very important difeoveries, by examining infetfts which he had preferved for feveral years in balfara.. Other infedfs he pundlured with a very fine needle ; and after fqueezing out all their moifture through the holes made in this manner, he filled them with air, by means of very flender glafs tubes*, then dried them in the fhade ; and laftly, anointed them with oil of fpike in which a little rofin had been diffolved $ and by which means they for a long time retained their pro¬ per forms. He was likewife in poffeffion of a fingular fecret, by which he could preferve the limbs of infedls as limber and perfpicuous as ever they had been. He ufed to make a fmall pun dure or inqifion in the tails ufi wormsy. c 21 i mic r * ■op'- woirns ■ and after having with great caution fqneczed out all the humours, as well as great part of the vifceraj he injected them with wax in fuch a manner as to give them the appearance of living creatures in perfect health. He found that the fat of all infedts-was entire¬ ly diffolvable in oil of turpentine •, by which means he Was enabled plainly to difcern the vifcera ; though, after this diflblution, it was neceffary to cleanfe and walh them frequently in clean water. In this manner he would frequently have fpent whole days in the prepara¬ tion of a lingle caterpillar, and cleanring it from its fat, in order to difcover the true fituation of the infers heart. He had a lingular dexterity in dripping off the {kins of caterpillars that were oh the point of fpinning their cones. This was done by letting them drop by their threads into fcalding water, and then fuddenly withdrawing them. Thus the epidermis peeled oft’ very eafily ; and, when this was done, he put them into diftilled vinegar and fpirit of wine mixed together in equal proportions; which, by giving a due degree bf firmriefs to the parts, gave him an opportunity of feparating them with very little trouble from the exu¬ viae, without any danger to the internal parts. Thus the nympha could be fliown to be wrapped up in the caterpillar and the buttertly in the nympha ; and there is little doubt that thofe who look into the works of Swammerdam, will be amply recompenfed, whether they confider the unexampled labour or the piety of the author. M. Lyonet, an eminent naturalift, ufually drowned the infeds he defigned to examine ; by which means he was enabled to preferve both the foftnefs and tranfparency of the parts. According to him, the infedl, if very fmall, viz. one tenth of an inch, or little more, in length, Chould be difledled on a glafs fomewhat concave. If it (hould be fufpedted that the infeft will putrefy by keeping for a few days, fpirit of wine diluted with water muft be fubftituted inftead of pure water. The infedl mutt be fuffered to dry ; after which it may be fattened by a piece of foft wax, and again covered with water.—Larger objedts fliould be placed in a trough of thin wood ; and for this purpofe the bottom of a common chip box will anfwer very well $ only furrounding the edge of it with foft wax, to keep in the water Or other fluid employed in preferving the in- fedl. The body is then to be opened •, and if the parts are foft like thofe of a caterpillar, they Ihould be turn¬ ed back, and fixed to the trough by fmall pins, which ought to be fet by a fmall pair of nippers. At the fame time, the {kin being ftretched by another pair of finer forceps, the infedl muft be put into water, and difledted therein, occafionally covering it with fpirit of wine. Thus the fubjedt will be preferved in per- fedtion, To that its parts may be gradually unfolded, no other change being perceived than that the foft elaftic parts become {tiff and opaque, while fome others lofe their colour. The following inttruments were made ufe of by M. Lyonet in his diffedlion of the Chenille de Saule. A pair of fciffars as fmall as could be made, with long and fine arms : A pair of forceps, with their ends fo nicely adjulted, that they could eafily lay hold of a fpider’s thread, or a grain of fand : Two fine fteel needles fixed in wooden handles, about two inches and three quarters 2 j M I C in length 5 which were the moft generally ufeful inftru- Mierfefcofft. meats he employed. » ~ "J Dr Hooke, who likewife made many microfcopic obfervations, takes notice, that the common ant or pifmire is much more troublefome to draw than other infedls, as it is extremely difficult to get the body in a quiet natural poflure. If its feet be fettered with wax or glue, while the animal remains alive, it fo twifts its body, that there is no poflibility of gaining a proper view of it *, and if it be killed before any obfervation is made, the fhape is often fpoiled before it can be exa¬ mined. The bodies of many minute infecls, when their life is deftroyed, inftantly fhrivel up ; and this is obferv- able even in plants as well as infedls, the furface of tliefe fmall bodies being affedled by the leaft change of air; which is particularly the cafe with the ant. If this creature, however, be dfopped into redlified fpirit of wine, it will inftantly be killed; and when it is taken out, the fpirit of wine evaporates, leaving the animal dry, and in its natural pollute, or at leafl in fuch a ftate, that it may eafily be placed in whatever pofture we pleafe. Parts of InfeBs. The wings, in many infedls, are fb tranfparent, that they require no previous preparation : but fome of thofe that are folded up under elytra or cafes, require a confider&ble fhare of dexterity to unfold them ; for thefe wings are naturally endowed with fuch a fpring, that they immediately fold themfelves again, unlefs care be taken to prevent them. The wing of the earwig, when expanded, is of a tolerable fize, yet is folded up under a cafe not one eighth part of its bulk j and the texture of this wing renders it difficult to be unfolded. This is done with the leaft trouble immediately after the infedl is killed. Holding then the creature by the thorax, between the finger and the thumb, with a blunt-pointed pin endeavour gently to open it, by fpreadingfit over the forefinger, andx at the fame time gradually Aiding the thumb over it. When the wing is fufficiently expanded, feparate it from the infedl by a {harp knife or a pair of fciflars. The wing fhould be preffed for fome time between the thumb and finger before it be removed 5 it ffiould then be placed between two pieces of paper, and again preffed for at leafl an hodr j after which time, as there will be no danger of its folding up any more, it may be put between the talcs, and applied to the microfcope. Similar care is requifite in difplaying the wings of the notonedla and other water infedls, as well as mod kinds of grylli. The minute fcales or feathers, which cover the wings of moths or butterflies, afford very beautiful ob- jedls for the mjcrofcope. Thofe from one part of the wing frequently differ in fhape from fuch as are taken from other parts ; and near the thorax, fhoulder, and on the fringes of the wings, we generally meet with hair inftead of fcales. The whole may be bruffied off the wing, upon a piece of paper, by means of a camels hair pencil •, after which the hairs can be feparated with the affiflance of a common magnifying glafs. It is likewife a matter of confiderable difficulty to diffedl properly the probofcis of infedls, fuch as the gnat, tabanus, &c. and the experiment muft be repeat¬ ed a great number of times before the flrudlure and fi¬ tuation MIC [23 Microfcope. tuation of the parts can be thoroughly inveftigated, as ' v the obferver will frequently difcover in one what he could not in another. The collecior of the bee, which forms a very curious object, ought to be firft carefully waflred in fpirit of turpentine j by which means it will be freed from the unftuous matter adhering to it : when dry, it is again to be walhed with a camel’s hair pencil to difengage and bring forward the fmall hairs which form part of this microfcopic beauty. The beft method of managing the flings of infedls, which are in danger of being broken by reafon of their hard- nefs, is to foak the cafe and the relt of the apparatus for fome time in fpirit of wine or turpentine 5 then lay them on a piece of paper, and with a blunt knife drawr out the ding, holding the (heath with the nail of the finger or any blunt inftrument j but great care is necef- fary to preferve the feelers, which when cleaned add much to the beauty of the objedl. The beard of the lepas anatifera is to be foaked in clean foft water, fre¬ quently brufhing it while wet with a camel’s hair pencil : after it is dried, the brulhing mult be repeated with a dry pencil to difengage and feparate the hairs, W’hich are apt to adhere together. To view to advantage the fat, brains, and other fi- milar fubftances, Dr Hooke advifes to render the fur- face fmooth, by prefting it between two plates of thin glafs, by which means the matter will be rendered much thinner and more tranfparent : without this pre¬ caution, it appears confufed, by reafon of the parts lying too thick upon one another. For mufcularfibres, take a piece of the flefh, thin and dry ; moilfen it with warm w^ater, and after this is evaporated the veffels will appear more plain and diftimfl \ and by repeated macerations they appear Hill more fo. The exuvice of infers afford a pleafing objeft, and require but little preparation. If bent or curled up, they will become fo relaxed by being kept a few hours in a moift atmofphere, that you may eafily extend them to their natural po- fitions j or the fleam qf warm water wall anfwer the purpofe very well. The eyes of infe£fs in general form very curious and beautiful obje&s. Thofe of the libellula and other flies, as w^ell as of the lobfler, &c. mull firft be cleaned from the blood, &c. after which they (hould be foaked in water for fome days,: one or two Ikins are then to be Separated from the.eye, which would be otherwife too opaque and confufed •, but fome care is requifite in this operation 5 for if the fldn be rendered too thin, it is irnpoflible to form a proper idea qf the organization of the part. In fome fubflances, however, the organi¬ zation is fuch, that by altering the texture of the part, we deflroy the obje£b which we wifli to obferve. Of this fort are the nerves, tendons, mufcular fibres, many of which are viewed to moft advantage when floating in fome tranfparent fluid. Thus very few' of the mufcular fibres can be difcovered when we attempt to view them .in the open air, though great numbers may be feen if they be placed in water or oil. By viewing the thread of a ligament in this manner, we find it compofed of a vail number of fmooth round threads lying clofe together. Elaftic objedls flrouid be pulled or ftretched out w'hile they are under the mi¬ crofcope, that the texture and nature of thofe parts, the figure of which is altered by being thus pulled out, may be more fully difcovered. ] M I G Other objeEis. To examine bones by the microfcopc, Microfcope- they (hould firft be viewed as opaque objects j but af- v J tenvards, by procuring thin flices of . them, they may be viewed as tranfparent. The feclions flrould be cut in all directions, and be wTell waflied and cleaned ; and in fome cafes maceration will be ufeful, or the bones may be heated red hot in a clear fire, and then taken out 5 by which means the bony cells will appear more confpicuous. The pores of the fkin may be examined bv cutting off a thin (lice off the upper Ikin with a razor, and then a fecond frpm the fame place ; applying the latter to the microfcope. The lizard, guana, &c. have two Ikins, one very tranfparent, the other thicker apd more opaque; and, feparatmg thefe two, you obtain very beautiful qbjeCls. To view the fcales of fifh to advantage, they ought to be foaked in water for a few' days, and then care¬ fully rubbed to clean them from the Ikin and dirt which may adhere to them. The fcales of the eel are a great curiofity j and the more fo, as this creature , was not known to have any fcales till they were difco¬ vered by the microfcope. The method of difeovering them is this. Take a piece of the Ikin of an eel from . off its fide, and fpread it while moift on a piece of glafs, that it may dry very fmooth : w'hen thus dried, the fur face will appear all over dimpled or pitted by the fcales, w'hich lie under a fort of cuticle or thin Ikin ; which may be raifed with the (harp point of a penknife, together with the fcales, which will then eafily flip out} and thus we may procure as many as wre pleafe. The leaves of many trees, as well as of fome plants, when diflefted, form a very agreeable objedt. In or¬ der to diiTeft them, take a few of the moft perfedl leaves you can find, and place them in a pan w ith clean water. Let them remain there three wrecks, or a month, without changing the water : then take them up; and if they feel very foft, and almoft rotten, they * are fufficiently foaked. They muft then be laid on a flat board, and holding them by the ftalk, draw the edge of a knife over the upper fide of the leaf, w'hich wdll take off moft of the (kin. Then turn the leaf, and do the fame with the. under fide -, and when the (kin is taken off on both (ides, wadi out the pulpy matter, and the fibres will be exhibited in a very beautiful manner. The leaf may be flit into two parts, by fplitting the ftalk ; and the (kins peeled from the fibres wdll alio make a good objecl. This operation is beft performed in the autumn ; the fibres of the leaves are much ftronger at that feafon, and lefs liable to be broken.—The internal ftrufture of (hells may be obferved by grinding them dowm on a hone : and all ores and minerals (hould be carefully waflied and brufhed with a fmall brufh, to remove any fordes that may adhere to them. To view’ the circulation of the blood, we muft ob-. ferve living animals of the moft tranfparent kind.— A fmall eel is fometimes ufed for this purpofe; in which cafe it muft be cleanfed from the (lime naturally adhering to it ; after w'hich it may be put into a tube filled with water, where it can be viewed in a fatis- factory manner. The tail of any other fmall fi(h may be viewed in the fame manner, or put upon a flip of flat glafs, and thus laid befoie the miprofeope. By filling the tube wdth w’ater when an eel is made ufe of, Wfe MIC [ 24 ] MIC Microfcope.we prevent in a great rneafure the riiminefs of the animal from foiling the glafs. I he particles of the blood form a very curious ob- je&, and have been carefully viewed by different phi- lofophers; who, nevertheless, differ from one another very much in their accounts of them. The bell: method ol viewing thefe is to take a fmall drop of blood when warm, and fpread it as thin as poiTible upon a flat piece of glafs. By diluting it a little with warm water, fome of the large globules will be feparated from the fmaller, and many of them fubdivid- ed ; or a fmall drop of blood may be put ifcto a ca¬ pillary glafs tube, and then placed before the micro- fcope. Mr Baker advifes warm milk as proper to be mixed with the blood j but Mr Hewffon, diluted the blood with its owm ferum : and by this method he could preferve the fmall particles entire, and view them di- ifincfly 5 and thus he found that they wrere not globular, as had been imagined by other anatomifls, but flat. Ha¬ ying fhaken a piece of the craffamentum of the blood in lerum till the latter became a little coloured, he fpread it with a foft hair pencil on a piece of thin glafs, which he placed under the microfcope, in fuch a man¬ ner as not be quite horizontal, but rather higher at one end than the other. Thus the ferum flows from the higher to the lower part ; and, as it flows, fome of the particles will be found to fwim on their flat fides, and will appear to have a dark fpot in the middle ; while others will turn over from one fide to the other as they roll dowm the glafs. Many cruel experiments have been tried in order to obferve the circulation of the blood in living creatures, and an apparatus has been invented for viewing the circula¬ tion in the mefentery of a frog ; but as this can an- fwer .no ufeful purpofe, and will never be put in praflice by perfons of humanity, wTe forbear to men¬ tion it. < II. Befides the objects for the microfcope already mentioned, there are innumerable others, fome hardly vifible, and others totally invifible, to the naked eye j and which therefore, in a more peculiar fenfe, are de¬ nominated Microfcopic Animals. They are the animalcules or moving bodies in water, in wdiich certain fubflances have been infuled j and of which there are a great many different kinds. Thefe animalcula are fometimes found in water which we would call pure, did not the microfcope difcover its minute inhabitants; but not equally in all .kinds of water, or even in all parts of the fame kind of it. The furfaces of infufions are general¬ ly covered with a fcum which is eafily broken, but ac¬ quires thicknefs by Handing. In this fcum the great- ell number of animalcules are ufually found. Some¬ times it is neceffary to dilute the infufions; but this ought always to be done with w-ater, not only diflill- ed, but viewed through a microfcope, left it ftiould alfo have animalcules in it, and thus prove a fource of deception It is, hovyever, moft proper to obferve thole minute objefts alter the water is a little evapo¬ rated ; the attention being lefs diverted by a few ob- jeffs tuan when they appear in great number. One or two of the animalcules nfay be feparated from the reft by placing a fmall drop of water on the glafs near th.w o, the mfufion ; join them together by making a ima.l connexion between them with a pin j and as 2 foon as you perceive that an animalcule has entered the Microfcope. clear drop, cut off the connexion again. '— Eels in pafte are obtained by boiling a little flour and water into the confidence of bookbinders pafte j then expofing it to the air in an open veffel, and beat¬ ing it frequently together to keep the furface from growing mouldy or hard. In a few days it wall be found peopled with myriads of little animals vifible to the naked eye, which are the eels in queftion. They may be prelerved for a w:hole year by keeping the pafte moiftened with water j and while this is done, the motion of the animals will keep the furface from growing mouldy. Mr Baker direcfts a drop or two of vinegar to be put into the pafte now and then. • When they are applied to the microfcrope, the pafte mull be diluted in a piece of water for them to fwim in Numberlefs animalcules are obferved by the micro¬ fcope in infufions of pepper. To make an infufion for this purpofe, bruife as much common black pepper as will cover the bottom of an open jar, and lay it there¬ on about half an inch thick : pour as much foft water into the veffel as will rile about an inch above the pepper. Shake the whole well together : after which they muff not be ftirred, but be left expofed to the air for a few days ; in which time a thin pellicle will be formed on the furface, in which innumerable ani¬ mals are to be obferved by the microfcope. I he microfcopic animals are fo (jifferent from thofe of the larger kinds, that fcarce any fort of analogy feems to exift between them; and one wTould almolt be tempted to think that they lived in confequence of laws directly oppofite to thofe which preferve ourfelves and other vifible animals in exiftence. They have been fyftematically arranged by O. F. Muller ; though it is by no means probable that all the different claffes have yet been difcovered. Such as have been obferv¬ ed, however, are by this author divided in the following manner: I. Such as have .no external organs, 1. Monas: Pundtiforme. A mere point. 2. Proteus : Mutabilis. Mutable. 3. Volvox : Sphaericum. Spherical. 4. Enchelis : Cylindracea. Cylindrical. 5. Vibrio : Elongatum. Long. * Membranaceous. 6. Cyclidium : Ovale. Oval. 7. Paramecium : Oblongum. Oblong. 8. Kolpoda : Sinuatum. Sinuous. 9. Gonium : Angulatum. With angles. 10. Burfaria. Hollow like a purfe. II. Thofe that have external organs, * Naked, or not enclofed in a thell. 1. Cercaria: Caudatum. With a tail. 2. Trichoda : Crinitum. Hairy. 3. Kerona : Corniculatum. With horns. 4. Himantopus: Cirratum. Cirrated. 5. Leucophra : Ciliatum undique. Every part cili¬ ated. 6. Vorticella : Ciliatum apice. The apex ciliated. * Covered with a fhell. 7. Brachionus > Ciliatum apice. T he apex ciliated. In MIC [2 Mkrofcope. In the treatife on Helminthology under the fifth 1 ' order of the clafs vermes, viz. Infuforia, the genera here enumerated have already been noticed according to an arrangement fomewhat different, and a few of the fpecies have been defcribed. For the fake of thofe Tvho wifh to profecute microfcopical inquiries we fhall introduce defcriptions of a few more, and particularly thofe whofe habitats arc known. I. Monas. This is by our author defined to be “ an invifible (to the naked eye), pellucid, fimple, punfliform worm but of which, fmall as it is, there are feveral fpecies. The monas termo or gelatinofa, is a fmall jelly- like point, which can be but imperfe&ly feen by the fingle microfcope, and not at all by the compound one. In a full light they totally difappear, by reafon of their tranfparency. Some infufions are fo full of them that fcarce the leaft empty fpace can be perceived j the water itfelf appearing compofed of innumerable globular points, in which a motion may be perceived fomewhat fimilar to that which is obferved when the fun’s rays {bine on the water; the whole multitude of animals appearing in commotion like a hive of bees. This animal is very common in ditch-water, and in almoft all infufions either of animal or vegetable fub- fiances. Monas atomus or albida; white monas with a variable point. This appears like a white point, which through a high magnifier appears fomewhat egg-fhaped. The fmaller end is generally marked with a black point, the fituation of which is variable ; fometimes it ap¬ pears on the large end, and fometimes there are two black fpots in the middle. This fpecies w’as found in fea wrater, which had been kept through the whole winter, but w-as not very fetid. No other kind of ani¬ malcule was found in it. II. The Proteus. An invifible, very fimple, pellucid worm, of a variable form. The tcnax, running out into a fine point/ This is a pellucid gelatinous body, ftored with black molecules, and likewife changing its figure, but in a more regular order than the former. It firft extends itfelf in a ftraight line, the lower part terminating in a bright acute point. It appears to have no inteftines ; and when the globules are all collected in the upper part, it next draws the pointed end up toward the middle of the body, which affumes a round form. It goes through a number of different fhapes, part of which are defcribed under the article Animalcule. It is found in fome kinds of river water, and appears con-- fined almoft entirely to one place, only bending fide- wife. III. Vo/vox. An invifible, very fimple, pellucid, fpherical worm. The punBum ; of a black colour, with a lucid point. This is a fmall globule, with one hemifphere opaque and black, the other having a cryftalline appearance ; and a vehement motion is obferved in the black part. Vol. XIV. Part I. 5 1 MIC It moves as on an axis, frequently palling through the Microfcope. drop in this manner. Many are often feen joined to-' ‘ gether in their^paffage through the water j fometimes moving as in a little whirlpool, and then feparating. They are found in great numbers on the furface of fetid fea water. The globulus, with the hinder part fomewhat ob- fcure, fometimes verges a little towards the oval in its fliape, having a flow fluttering kind of motion, but more quick when difturbed. The inteftines are but juft vifible. It is found in moft vegetable infulions, and is ten times larger than the monas lens. The lunula, with lunular molecules, is a final? roundiih tranfparent body, confifting of an innumerable multitude of homogeneous molecules of the lhape of a crefcent, without any common margin. It moves con¬ tinually in a twofold manner, viz. of the molecules among one another, and the whole mafs turning flowly round. It is found in marfliy places in the beginning of fpring. IV. Enchelis. A fimple, invifible, cylindric worm. The viridis, or green enchelis, has an obtufe tail, the fore part terminating in an acute truncated angle ; the inteftines are obfcure and indiftinft. It continual¬ ly varies its motion, turning from right to left. The punSiifera, having the fore part obtufe, the hinder part pointed. It is opaque, and of a green colour, with a fmall pellucid fpot in the fore' part, in which two black points may be feen •, and a kind of double band crofi'es the middle of the body. The hinder part is pellucid and pointed, with an incifion fuppofed to be the mouth, at the apex of the fore part. It is found in marlhes. The papula, with the fore part papillary, is found in dunghill water in November and December : it has a rotatory motion on a longitudinal axis, and moves in an oblique diredlion through the water. Both ends are obtufe ; and the hinder part is marked with a tranf¬ parent circle, or circular aperture. V. Vibrio: A very fimple, invifible, round, and rather long worm. The lineola is found in moft vegetable infufions in fuch numbers, that it feems to fill up almoft the whole of their fubftance. It is fo fmall, that with the bell magnifiers we can difcern little more than an obfcure tremulous motion among them. It is more {lender than the monas terma. The ferpens, with obtufe windings or flexures, is found in river water, but feldom. It is (lender and ge¬ latinous, refembling a ferpentine line, with an inteftine down the middle. The fpirilium is exceedingly minute, and twilled in a fpiral form, which feems to be its natural lhape as it never untwifts itlelf, but moves forwrard in a ftraight line, vibrating the hind and fore parts. It was found in 1782 in an infufion of the fonchus arvenfis. The vermiculus has a milky appearance, -with an ob¬ tufe apex, and a languid undulatory motion, like that of the common worm. It is found in marftiy water in D November MIC [ 26 ]' MIC Microfcope. November, but feldom. It is thought to be the animal mentioned by Leeuwenhoeck as found in the dung of the frog and fpawn of the male libellula. The fagitta, with a fetaceous tail, has a long and fle.xible body ; broadeft about the middle, and filled there alfo with gray molecules; the fore part being drawn out into a thin and tranfparent neck, and the upper end thick and black. It is found in fait water, and feems to move by contradling and ^extending its «ieck. veral globules, and has an oblique incifion a little belotv Microfcope. the apex. w""'v The ren, or crajfa, is found in ah infufion of hay, commonly about 13 hours after the infufion is made, and has a quick and vacillatory motion. Its body is yel¬ low, thick, and lomewhat opaque j curved a little in the middle, fo that it refembles a kidney *, and full of molecules. When the water in which it fwims is about to fail, it takes an oval form, is compreffed, and at laft burfts. . VI. Cyclidium. A fimple, invifible, flat, pellucid, orbicular or oval worm. The bulla, or orbicular bright cyclidium. This is found occafionally in an infufion of hay. It is very pellucid and white, but the edges fomewbat darker than the reft. It moves flowly, and in a iemicircular dir^&ion. The millium is very pellucid, and fplendid like cry- ftal j and of an elliptical figure, with a line through the whole length of it. The motion is fwift, i iterrupt- ed, and fluttering. VII. Parcruzcium. An invililale, membranaceous, flat, and pellucid worm. The chryfalls is found in fait water, and differs very little from the former, only the ends are more obtufe, and the margins are filled with black globules. The verfutum is found in ditches, and has an oblong, green, and gelatinous body, filled with molecules ; the lower part thicker than the other ; and both ends ob¬ tufe. It propagates by divifion. VIII. Kolpoda. An invifible, pellucid, flat, and crooked worm. The lamella is very feldom met with. It refembles a long, narrow, and pellucid membrane, with the hind part obtufe, narrower, and curved towards the top. It has a vacillatory and very Angular motion ; going upon the fharp edge, not on the flat fide as is ufual with mi- crofcopic animals. The gallinula is found in fetid fait water ; and has the apex fomewhat bent, the belly oval, convex, and ftriated. The roflrum is found, though feldom, in water where the lemna grows -y and has a flow and horizontal motion. The fore part is bent into a kind of hook j the hind part obtuie, and quite filled with black mole¬ cules. The triqueira was found in fait water, and appears to confift of two membranes ; the upper fide flattened, the lower convex, with the apex bent into a kind of fhoulder. The ajfimilis is found on the fea-coaft, and has an elliptic mafs in the middle, but is not folded like the former. The margin of the fore part is notched from the top to the middle ; the lower part fwelis out, and contrafts again into a fmall point. The cucullulus is found in an infufion of the fonchus arvenfis. It is very pellucid and cryftalline, with fe- IX. Gaiiium. An invifible, fimple, fmooth, and angular worm. The pulvinatum is found in dunghills j and appear* like a little quadrangular membrane, plain on both fides 5 but with a large magnifier it appears like a bolfter formed of three or four cylindric pillows funk here and there. The corrugatum is found in various kinds of infii- fions j and is, fomewhat of a fquare fliape, very final!, and in fome pofitions appears as ftreaked. The truncatum is found chiefly in pure water, and then but feldom. It has a languid motion, and is much larger than the foregoing. The fore part is a ftraight line, with which the fides form obtufe angles, the end of the fides being united by a curved line. The inter¬ nal molecules are of a dark green, and there are two little bright veficles in the middle. X. Burfaria. A very fimple, hollow, membranaceous worm. The truncatella is vifible to the naked eye ; white, oval, and truncated at the top, where there is a large aperture defeending towards the bafe. Moft of them have four or five yellow eggs, at the bottom. They move from left to right, and from right to left; af- cending to the furface in a ftraight line, and fometimes rolling about while they defeend. The bullina is pellucid and cryftalline, having fpleiv did globules of different fizes fwimming about with it. The under fide is convex, the upper hollowq with the fore part forming a kind of lip. The hirundinella has two fmall projecting wings, vduch give it fomewhat of the appearance of a bird : and it moves fomething like a fwallow. It is invifible to the naked eye; but by the microfcope appears a pellucid hollow membrane. The duplella was found among duckweed, and ap¬ pears like a cryftalline membrane folded up, without any vifible inteftines except a fmall congeries of points under one of the folds. XT. Cercaria. An invifible tranfparent worm with a tail. The gyrinus greatly refembles the fpermatic animal¬ cules. It has a white gelatinous body *, the fore part fomewhat globular; the hind part round, long, and pointed. Sometimes it appears a little compreffed on each fide. When fwimming it keeps its tail in conti¬ nual vibration like a tadpole. The gibba is found in the infufions of hay and other vegetables;. MIC £ Micracope. vegetables; and is fmall, opaque, gelatinous, white, and without any vilible inteftines. The inquieta is found in fait water, and is remarkable for changing the (hape of its body : fometimes it ap. pears fpherical, fomethnes like a long cylinder, and fometimes oval. It is white and gelatinous, the tail fi¬ liform and flexible, the upper part vibrating violently. A pellucid globule may be obferved at the bafe, and two very fraall black points near the top. 1 he turbo, with a tail like a briftle, is found among duckweed. It is of a talcy appearance, partly oval and partly fpherjcal j and feems to be compoled of two glo¬ bular bodies, the lowermofl of which is the fmallefl, and it has two little black points like eyes on the upper part. The tail is fometimes ftraight, fometimes. turned back on the body. The poduria is found in November and December, in marlliy places covered withfcJemna. It is pellucid \ and feems to confift of a head, trunk, and tail: the head refembles that of a herring ; the trunk is ventri- cofe and full of inteftines, of a fpiral form and black colour. The tail moft commonly appears to be divided into two briftles. The inteftines are in a continual mo¬ tion when the body moves, and by reafon of their va¬ rious {hades make it appear very rough. There are likewife home hairs to be perceived. It turns round as upon an axis when it moves. The viridis is found in the fpring in ditches of Hand¬ ing water ; and in fome of its ftates has a confiderable re emblance to the laft, but has a much greater pow’er of changing its ihnps. It is naturally cylindrical, the lower end iharp, and divided into two parts; but fome¬ times contracts the head and tail io as to aflame a fphe- rical figure. The fetifera is found in fait water, but feldom. It is final!, the body rather opaque, and of a round fi¬ gure. The upper part is bright, and fmailer than the reft: the trunk is more opaque j the tail fharp, and near it a little row of ihort hairs. It has a flow rotato¬ ry motion. The htrta was likewife found in fait water. It is opaque and cylindrical; and when in motion, the body appears to be furrounded with rows of finall hairs fepa- rated from each other. The pleuronecies is found in water which has been kept for feveral months. It is membranaceous, round¬ ish, and white, with two blackiih points in the fore part, the hinder part being furnilhed with a {lender {harp tail. It has orbicular inteftines of different fizes in the middle ; the larger of them bright. The mo¬ tion is vacillatory j and in fwimming it keeps one edge of the lateral membrane upwards, the other folded dowm. The tripos is flat, pellucid, triangular, having each angle of the bafe or fore part bent down into two linear arms, the apex of the triangle prolonged into a tail. It is found in fait water. XII. Leucophra. An invisible, pellucid, and ciliated worm. The mamilla is of a dark colour, and filled with glo¬ bular molecu’e- ; ftiort hairs are curved inwards j and it occasionally projetfs and draws in a little white pro¬ tuberance, It is pretty common in marfliy water. 27 ] MIC ihe virefeens is a large, pear-fliaped, greenith-co-Microfrepe- loured animalcule, filled with opaque molecules, and * covered with Ihort hairs j generally moving in a ftraight line. It is found in fait water. The lurfata is found in fait water, and is fimilar in many refpecls to the former. It is of a long oval ftiape, bulging in the middle, and filled with green molecules, everywhere ciliated except at the apex, which is trun¬ cated and Shaped fomewhat like a purfe 5 the hairs are fometimes colledled into little fafcicles. _ The pojlhuma is globular, and covered as it were with a pellucid net; is found in fetid fait water. ^ T'AtJigaata is common in fait water in jthe months 06 November and December. It is oblong and fubdepref- fed, wdth a black margin filled w-ith little molecules, but more particularly diftinguifhed by a curved line in the middle fomewhat in the Shape of the letter S ; one end of which is fometimes bent into the form of a fmall fpiral. XIII. Trichoda. An invifible, pellucid, hairy worm. The gyrinus is one of the fmalleft of this genus, and is found in fait water. It is fmpoth and free from hairs, except at the fore part, where there are a few. The nigra was found in fait w^ater, and has an opaque body ; . but when at reft one fide appears pellucid. When in violent motion, it feems entirely black. d he is found in rvater wTtiere duckweed groxvs, chiefly in the month of December. It has a bunch above the hind part marked with black fpots, depreffed towards the top, a little folded, and fomewhat convex on the under part. The apex is furniftied with hairs, but they are feldom visible till the creature is in the agonies of death, when it extends and moves them ve¬ hemently, and attempting as it were to draw in the very laft drop of water. patens is found in fait water j and is of a long cylindrical fliape, filled with molecules, the fore part bright and clear, with a long opening near the top which tapers to a point, and is befet with hairs. r\iheJ}riata is found in the month of December in rx- vei. water. It is a beautiful animalcule, of a fox colour. It is of an oblong ftiape, the lower end fomewhat lar¬ ger than the other. It has a fet of ftreaks running from one end to the other, and at the abdomen a double row of little eggs lying in a tranfverfe di¬ rection. The uvu/a is found in the infufion of hay and other vegetables. It is fix times longer than broad, round, flexuous, of an equal fize, the greater part filled with obfeure molecules; the fore part rather empty, with an alimentary canal and lucid globules near the middle. The margin of the fore part is covered with Ihort hairs. The linter is found in air infufion of old grafs. It is egg-fliaped, oblong, with both extremities raifed fo that the bottom becomes convex, and the upper part de- prefled like a boat : it is of different ftiapes at different ages, and fometimes has a rotatory motion. The paxillus is found in fait water ; and is long, full of gray molecules ; the fore part truncated and hairy and rather fmaller than the other. The vermicularis is found in river water : and is pel- 2 lucid MIC MIC [ 2 Micrdicope.lucid in the fore part, with the hind part full of mole- cults. The mt/itcea is found in fait water, but very rarely. It is oblong, ciliated, with a globular apex, a dilatable neck, and a kind of periftaltic motion perceivable with¬ in it. . The perillum is frequently found in marfhes. It is cylindrical, pellucid, mufcular, and capable of being folded up. It appears double j the interior part full of molecules, with an orbicular mufcular appendage, which it can open and Ihut, and which forms the mouth. The external part is membranaceous, pellucid, dilated, and marked with tranfverfe ftreaks *, and it can protrude or draw in the orbicular membrane at pleafure. Some have four articulations in the tail, others five ; and it has two pairs of briftles, one placed at the fecond joint, the other at the laft. The delphis is found in river water. It is fmooth, pellucid, having the fore part dilated into a femicircle, gradually decreafing in breadth towards the tail. The front is hairy, the hairs Handing as rays from the fe- micircular edge : one of the edges is fometimes con- Uadled. The delphinus is found in hay that has been infufed for fome months. It is pellucid, fmooth* and egg-lha- ped j the hinder part terminating in a tail about half the length of the body, dilated at the upper end, trun¬ cated, and always bent upwards. It moves fometimes on its belly and fometimes on its fide. The rojlrata is found in w'ater where duckwTeed has been kept. It is depreffed, capable of changing its fhape, yellow, with long ciliated hairs ; it has four feet tapering to a point, one of them longer than the reft. Both feet and hairs are within the margin. The ftiape of the body is generally triangular ; the apex formed into an obtufe beak, which the creature fometimes draws in fo that it appears quite round. The charon rvas found in fait water. It is oval, and refembles a boat as well in its motion as fhape •, the up¬ per part is hollowed, the under part furrowed and eon- vex j the ftern round, with feveral hairs proceeding from it. XIV. Kerona. An invifible worm with horns. The raftellum is found in river ivater. It has three rows of horns on the back, which occupy almoft the whole of it. The cypris is found in wTater covered with lemna. It is fomewhat of a pear ftiape, compreffed, with a broad and blunt fore part j the front furniftied with hairs, or little vibrating points inferted under the edge, fhorter in the hind part, partly extended ftraight, and partly bent down, having a retrograde motion. The calvitium is found in the infufion of vegetables. The body is broad and flat, both fides obtufe, filled with black molecules, and there is a black fpot near the hinder part, where there are likewife a few ftiort briftles. The puftulata is found in fait wrater. It is oval, con¬ vex one edge of the hinder part finuated, both ends {et with hairs, and fome horns on the fore part. 8 ] XV. Hitnantopus. A pellucid, invifible, and cirrated worm. Microfcope. The acarus is lively, conical, ventricofe, full of black molecules, with a bright and tranfparent fore part. The lower part of the apex has rows of long hairs on the under part fet like rays. Four locks of long crooked hair or feet proceed from the belly, and it is continually moving thefe and other hairs in various directions. The /udio is a lively diverting animalcule, fmooth, pellucid, full of fmall points, the fore part clubbed and a little bent, the hinder part narrow ; the bafe oblique¬ ly truncated, and terminating in a tail ftretched out tranfverfely. The top of the head and middle of the back are furniftied with long and vibrating hairs 5 three moveable and flexible curls hang down from the fide of the head at a diftance from each other. When the creature is at reft, its tail is curled ; but when in mo¬ tion, it is drawm tight and extended upwards. The fannia is found, though feldom, in water where the lemna growTs._ The cilia are longer than the hairs, and are continually vibrating : it has twro moveable curls hanging on the fide of the head. The charon is found in fea water, but rarely. It is oval, pellucid, and membranous, with longitudinal fur- tows and feveral bent diverging rows of hair below the middle, but none on the hinder part. XVI. Vorticella. A naked worm with rotatory cilia, capable of contract¬ ing and extending itfelf. The lunifera is found in fait water j has the fore part obtufe, the bafe broad, and hollowed away like a crel- cent, with a ftiort protuberance in the middle of the concave part : the fore part is ciliated. The burfata is found in fait water, and is ventri¬ cofe, crammed wdth molecules; the fore part truncat¬ ed, and both fides of it pellucid : there is a prominent papilla in the middle, which when the animalcule is at fell appears notched, the edge of the aperture being ciliated 5 the hairs are capable of moving in various di- reCHons. The fputarium is found in OClober, with the lefler lemna, and is one of the moft Angular of the microfco- pic animalcules. When viewed fidewife, it is fometimes nearly cylindrical, only tapering a little towards the hinder part, and having a broad pellucid edge. Viewed from the top, it has fometimes a broad face or dilk, furniftied with radiating hairs, the under part contract¬ ed into a globular ftiape, of a dark green colour, and filled with fmall grains. The multiformis is found in fait water, and very much refemblei the former. The nigra is found in Auguft in meadows covered with w^ater. It may be feen with the naked eye, ap¬ pearing like a black point fwimming on the furface. Through the microfcope it appears as a fmall conical body, obtufe and ventricofe at one end, and acute at the other. When the extremities are extended, two fmall white hooks become vifibl > y the afliltance of which. M 1 C t 29 ] M I C Microfcope. vvliicli it moves in the water, and it probably has a ro- tatory organ : it moves continually in a vacillating manner on the top of the water. The ocreata is met with in rivers, though very fel- dom, and in (hape fomewhat refembles the lower part of a boot. The apex of the upper part is truncated and ciliated, the heel pointed, and the foot round. The valga is as broad as long, and the apex trunca¬ ted and ciliated j both angles of the bafe projecting outwards, one fomewhat like a wrart, the other like a finger. It is found in marlhy waters. The papillaris is likewife found in marthes where the conlerva nitida grow'S. It is ventricofe ; the fore part truncated, with a papillary tail, and a beautiful papil¬ lary excrefcence on the fide. The cratiTgaria is found in the month of April, both in the mud and on the tail of the monoculus quadricor- nis. They are generally heaped together in a fpherical form, and united to one common ftalk. They are like- wdfe often to be found without a pedicle, the body ra¬ ther contrafted, the aperture circular, and furrounded with a marked margin. It has two finall arms ; and with a powerful magnifier a violent rotatory motion may be obferved. Sometimes an individual will feparate from the community, and move in a kind of fpiral line for a little time, and then go back to the reft. The rotatoria is the wheel animal defcribed by Mr Baker 5 and of which an account is given under the ar¬ ticle Animalcule. The furcata is commonly found in water, and has a cylindric body with a rotatory organ, confifting of a row of hairs at the apex : the tail is divided into two parts, turning a little inwards. When at reft it joins the fegments of the tail, but opens them w’hen in mo¬ tion. The citrina is found in ftagnant water j the head full of molecules, round, everywhere of an equal fize, and very tranfparent. Both fides of the orifice are ci¬ liated, and each has a rotatory motion appearing fome- times without and fometimes wdthin the edge of the mouth. * The convallaria is the fame with the bell-animal mentioned by Mr Baker. See the article Animal¬ cule. The acinofa inhabits that whitifh fubftance which of¬ ten entirely covers plants, wmod, fliells, &c. When this fubftance is examined by a microfcope, it appears to be wholly compofed of living animals of the polype kind. See Polype. The pyraria. The anajlatica. V See the article Polype. The digitalis. J XVII. Brachionus. A contraClile worm, covered wdth a ftiell, and furnilhed with rotatory cilia. The patella is found in marlhy water in the winter¬ time. It is univalve, the (hell oval, plain, cryftal- iine, wdth the anterior part terminating in two acute points on both fides, though the intervening fpace is commonly filled up with the head of the animal. By thefe points it fallens itfelf, and whirls about the body eretl. The rotatory cilia are perceived with great dif¬ ficulty. To what has been already faid on this fubjeCl, under Micrcfcopt. the article Animalcule, we lhall here add the follow- ' ing obfervations from Mr Adams.—44 How many kinds of thefe invifibles there may be (fays he), is yet un¬ known ; as they are difcerned of all fizes, from thofe which are barely invifible to the naked eye, to fuch as refill the force of the microfcope as the fixed liars do that of the telefcope, and with the greateft powers hi¬ therto invented appear only as fo many moving points. The fmalleft living creatures our inftruments can Ihow, are thofe which inhabit the waters ; for though animal- cula equally minute may fly in the air, or creep upon the earth, it is fcarcely poftible to get a view of them *, but as w'ater is tranlparent, by confining the creatures within it we can eafily oblerve them by applying a drop of it to the glafies. “ Animalcules in general are obferved to move in all directions with equal eafe and rapidity, fometimes obliquely, fometimes llraight forward ; fometimes mov¬ ing in a circular diredion, or rolling upon one another, running backwards and forwards through the whole ex¬ tent of the drop, as if diverting themfelyes ; at other times greedily attacking the little parcels of matter they meet with. Notwithftanding their extreme minutenefs, they know7 how to avoid obilacles, or to prevent any in¬ terference with one another in their motions : fometimes they will fuddenly change the direClion in which they move, and take an oppofite one ; and, by inclining the glafs on which the drop of water is, as it can be made to move in any direflion, fo the animalcules appear to move as eafily againft the ftream as with it. When the water begins to evaporate, they flock towards the place where the fluid is, and ihow a great anxiety and un¬ common agitation of the organs with which they drawT in the water. Thefe motions grow languid as the wa¬ ter fails, and at laft ceafe altogether, without a poflibi- lity of renewal if they be left dry for a ftrort time. They fuftain a great degree of cold as well as infedls, and will periih in much the fame degree of heat that deftroys infects. Some animalcules are produced in w-a- ter at the freezing point, and fome infedls live in fnow. —By mixing the leaft drop of urine with the water in which they fwim, they inftantly fall into convulfions and die. “ The fame rule feems to hold good in thofe minute creatures, which is obfervable in the larger animals, viz. that the larger kinds are lefs numerous than fuch as are fmaller, while the fmalleft of all are found in fuch multitudes, that there feem to be myriads for one of the others. They increafe in-fize, like other animals, from their birth until they have attained their full growth ; and when deprived of proper nourifhment, they in like manner grow thin and periih.” The modes of propagation among thefe animalcules are various, and the obfervation of them is extremely curious. Some multiply by a tranfverfe divifion, as is obferved under the article Animalcule : and it is re¬ markable, that though in general they avoid one an¬ other, it is not uncommon, when one is nearly divided, to fee another pulh itfelf upon the fmall neck which joins the two bodies in order to accelerate the fepara- tion.—Others, when about to multiply, fix themfelves to the bottom of the water ; then becoming firft ob¬ long, and afterwards round, turn rapidly as on a centre, but perpetually varying the diredlion of their rotatory motion. . MIC [ 30 1 MIC jVT\ rofcope. motion. In, a little time, two lines forming a crofs they adhere, and magnified by the microfcope. TheMicrofcope* v—~ are perceived ; after which the fpherule divides into ftrong ground-work vifible in many places Ihows ' four, which grow, and are again divided as before, the gum by which they are faftened together j A third kind multiply by a longitudinal divifion, which and this connexion is llrengthened by a very te- iu feme begins in the fore part, in others in the hind nacious fubftance interpofed between the eggs, and part ; and from others a fmall fragment detaches it- filling up the vacant fpaces. Fig. 34. fhows a vertical feif, which in a (hort time afl'umes the fhape of the fe&ion of the eggs, exhibiting their oval (hape.— parent animalcule. Laftly, others propagate in the Fig. 35. is an horizontal feftion through the middle fame manner as the more perfedl animals. of the egg.' Thefe eggs make a beautiful appearance In our obfervations under the article ANIMALCULE, through the microfcope. The fmall figures re- we fuggetted fome doubts whether all thofe minute bo- prefent the objects in their natural ftate, without being dies which go under the name of animalcules really do ihagnified. enjoy animal life; or whether they are not in many Fig. 36. {hows the larva of the tnufca chameleon, an cafes to be accounted only inanimate and exceedingly aquatic infedl. When viewed by the naked eye, it ap- minute points of matter actuated by the internal motion pears (hs here reprefented ) to be compofed of twelve of the fluid. This has alfo been the opinion of others: annular divifions, feparating it into an head, thorax, but to all hypothefes of this kind Mr Adams makes and abdomen ; but it is not eafy to diftinguiflr the two the following reply : “ From what has been faid, it laft parts from each other, as the inteftines lie equally clearly appears, that their motions are not purely me- both in the thorax and abdomen. The tail is furnifhed chanical, but are produced by an internal fpontaneous with a fine crown or circle of hair b, difpofed in the principle ; and that they muft therefore be placed form of a ring, and by this means it is fupported on among the clafs of living animals, for they pofTefs the the furface of the w7ater, the head and body hanging ftrongeU marks and the moft decided charafters of ani- down towards the bottom, in which poflure it will mation ; and, confequently, that there is no foundation fometimes remain for a confiderable time without any for the fuppofition of a chaotic and neutral kingdom, motion.—When it has a mind to fink to the bottom, it which can only have derived its origin from a very clofes the hairs of the ring, as in fig. 37. Thus an hol- tranfient and fuperficial view of thefe animalcules.—It low fpace is formed, including a fmall bubble of air j may alfo be further obferved, that as we fee that the by enlarging or diminilhing which, it can rife or fink motions of the limbs, &c. of the larger animals, are in the water at pleafure. When the bubble efcapes, the produced by the mechanical ccnflruilion of the body, infe£t can replace it from the pulmonary tubes, nnd and the aftion of the foul thereon, and are forced by fometimes confiderable quantities of air may be feen the ocular demonitration which arifes from anatomical to efcape from the tail of the worm into the common dilie&ion to acknowledge this mechanifm which is a- atmofphere j which operation may eafily be obferved dapted to produce the various motions neceffary to the when the worm is placed in a glafs of water, and af- animal ; and as, when we have recourfe to the micro- fords an entertaining fpeclacle. The fnout of this in- fcope, we find thofe pieces which had appeared to the fe6t is divided into three parts, of which that in the naked eye as the primary mechanical caufes of particu- middle is immoveable ; the other two, which grow lar motions, to confifi: themfelves of lefier parts, which from the fides of the middle one, are moveable, and are the haufes of motion, extenfion, &c. in the larger $ vibrate like the tongues of lizards or ferpents. In thefe when the ftru£ture therefore can be traced no farther lateral parts lies moft of the creature’s ftrength •, for it by the eye, or by the'glaffes, we have no right to con- walks upon them when out of the water, appearing to elude that the parts which are invifible are not equally walk on its mouth, and to ufe it as the parrot does its the fubjedt of mechanifm : for this would be only to af- beak to aflift it in climbing. fert, in other words, that a thing may exift becaufe we The larva is Ihown, fig. 38. as it appears through a fee and feel it, and have no exiftence when it is not the microfcope. It growrs narrower towards the head, is objedl of our feufes.—The fame train of reafoning may largeft about that part which we may call the thorax, be applied to microfcopic infedts and animalcula : w7e converges all along the abdomen, and terminates at fee them move •, but becaufe the mufcles and members length in a {harp tail furrounded with hairs, as has al- which occafion thefe motions are invifible, {hall vve in- ready been mentioned. The twelve annular divifions fer that they have not mufcles, with organs appropri- are now extremely vifible, and are marked by numbers ated to the motion of the whole and its parts ? To fay in the plate. The {kin appears fomewhat hard, and that they exift not becaufe we cannot perceive them, refembling {hagreen, being thick fet with grains pret- would not be a rational conclufion. Our fenfes are ty equally diftributed. It has nine holes, or fpiracula, indeed given us that we may comprehend fome effedls; probably for the purpofe of breathing, on each fide j but Chen we have alfo a mind, with reaibn, beftowed but it has none of thefe on the tail divifion a, nor any upon iis, that, from the things which we do perceive eafily vifible on the third from the head. In the lat- with our fenfes, we may deduce the nature of thofe ter, indeed, it has fome very fmall holes concealed un- caufes and effe&s which are imperceptible to the cor- der the Ikin, near the place where the embryo wings poreal eye.” of the future fly are hid. “ It is remarkable (fays Mr Leaving thefe /peculations, however, vve {hall now Adams) that caterpillars, in general, have two* rings proceed to give a particular without thefe fpiracula, perhaps becaufe they change Explanation oj the figures of the various animals, into flies with four wings, whereas this worm produces 'ivith their parts, ova, <&c. reprefented in the plates. a fly with only two.” The {kin of the larva is adorn- Plate Fig. 32. 33. reprefent the eggs of the phalsena ed with oblong black furrows, fpots of alight colour, CCCXLII. neuftria, as they are taken from the tree to which and orbicular rings, from which there generally fprings 3 ' ‘ a MIC [ 3i ] M I C Microicope. a liair 5 but Only thofe hairs which grow on the infeft’s ■’ fides are reprefented in the figure. There are alfo fome larger hairs here and there, asatrc. The difference of colour, however, in. this worm arifes only from the quantity of grains in the fame fpace $ for where they are in very great numbers, the furrows dre darker, and paler where they are lefs plentiful. The head d is divided into three parts, and covered with a 1km which has hardly any difcernible grains.— The eyes are rather protuberant, and lie near the fnout j on which laft are tvvofmall horns at ii. It is crooked, and ends in a (harp point as at f. The legs are placed near the fnout between the finufes in which the eves are fixed. Each of thefe legs confifts of three joints, the outerraoft of which is covered with ffiff hairs like briftleS £■ From the next joint there fprings a horny bone h h, ufed by the infect as a kind of thumb : the joint is.alfo compofed of a black fubftance of an inter¬ mediate hardnefs between bone and horn; and the third joint is of the fame nature. In order to diftinguilh thefe parts, thofe that form the upper fides of the mouth and eyes muff be feparated by means of a fmali knife ; after ^vhich, by the affidance of the microfcope, we may perceive that the leg is articulated by fome parti¬ cular ligaments, with the portion of the infe&’s mouth which anfwers to the lower jaw in the human frame. We may then alfo difcern the mufcles which ferve to move the legs, and draw them up into a cavity that lies between the fnout and thofe parts of the mouth which are near the horns i i. The infedl walks upon tail anfwers the double purpofe of fwimming and breath* Microfcope• ing, and through it the infeft receives what is the prin- v ciple of life and motion to all animals. By means of thefe hairs alfo it can flop its motion when fwimming, and remain fufpended quietly without motion for any length of time. Its motions in fwimming are very beautiful, efpecially when it advances with its whole body floating on the furface of the water after filling itfelf with air by the tail.—To fet out, it firft bends the body to the right or left, and then contraffs it in the form of the letter S, and again ftretches it out in a ftraight line : by thus contradling and then ex¬ tending the body alternately, it moves on the furface of the water. It is very quiet, and is not diflurbed by handling. Thefe creatures are commonly found in (hallow (landing waters in the beginning of June : but fome years much more plentifully than others. They crawl on the grafs and other plants which grow in fuch wa¬ ters, and are often met with in ditches floating on the furface of the winter by means of their tail, the head and thorax at the fame time hanging down ; and in this pofture they turn over the clay and dirt with their fnout and feet in fearch of food, which is commonly a vifcous matter met with in fmall ponds and ditches. It is very harmlefs, though its appearance would feem to indicate the contrary. It is moft eafily killed for difleflion by fpirit of turpentine. Fig. 39. (hows in its natural fize a beautiful infefl, defcribed by Linnaeus under the name of Leucopjis dor- thefe legs, not only in the water, but on the land alfo. Jtgera, and which appears to be a kind of iutermedi- It likevvife makes ufe of them in f.vimming, keeping its ate genus between a fpbex and a wafp. The antennce tail on the furface contiguous to the air, and hanging are black and cylindrical, increafing in thicknefs to- downward with the red of the body in the water. In wards the extremity ; the joint neareft the head is this fituation, the only perceptible motion it has is in its l$gs, which it moves in a mbfl elegant manner, from whence it is reafonable to conclude, that the moft of this creature’s (Length lies in its legs, as we have al¬ ready obferved. The fnout of this larva is black and hard ; the back part quite folid, and fomewhat of a globular form ; the yellow; the head and thorax are black, encompaffed with a yellow line, and furnilhed with a crofs line of the fame colour near the head. The fcutellum is yellow, the abdomen black, with two yellow bands, and a deep fpot of the fame colour on each fide between the bands, A deep polilhed groove extends down the back from the thorax to the anus, into which the front yiharp and hollow. Three membranaceous di- fling turns and is depofited, leaving the anus very cir- viuons may be perceived on the back part; by means cular ; a yellow line runs on each fide of the fling.— of which, and the mufcles .contained in the fnout, the The anus and whole body, when viewed with a (mall creature can contract or expand it at pleafure. magnifier, appear pumfluated ; but when thefe points The extremity of the tail is furroanded with thirty are feen through a large magnifier, they appear hexa- hairs, and the fides adorned with others that are fmall- gonal. Fig. 40. (hews the infeed very much magni- er ; and here and there the large hairs branch out into iied. Fig. 41. gives a fide view of it magnified in a fmaller ones, which may be reckoned lingle hairs. All fmailer degree. thefe have their roots in the outer (kin, which in this Fjg, '42. (hows an infetd lately difeovered by Mr place is covered with rough grains, as may be obferv- ed by cutting it off and holding it again:! the light upon a flip of glafs. Thus alfo we find, that at the ex¬ tremities of the hairs there are grains like thofe on the (kin; and in the middle of the tail there is a fmall open¬ ing, within which are minute holes, by which the infeed John Adams of Edmonton, as he happened to be at an inn. It was firft feen by fome labouring people who were there a: the time, by whom it was conjec¬ tured to be a loufe with unufually long horns, a mite, &c. Mr Adams hearing the debate, procured the infetd ; and having viewed it through a microfcope, it takes in and lets out the air it breathes. Thefe hairs, prefented the appearance exhibited in fig. 42. The Plate however, are feldom difpofed in fuch a regular order as infect feems to be quite diftimd from the phalangium CCCXLIIL is reprefented in fi hard that the ram cannot difiolve it. Tlje egg it¬ felf is very fmall and fpheroidical, and, when examined by the microfcope, appears to have broad waving fur¬ rows running through the whole length of it, which are again crofied by clofe ftreaks, giving it the appearance of a wicker balket. It is not exadlly known what time they are hatched ; but as the fmall caterpillars appear in September, it is probable that the eggs are hatched fome time in Auguff. When fmall, they are generally met with under the bark of the tree to which the eggs were afhxed ; and an aqueous moiflure, oozing from the hole through which they got under the bark5 is frequently, though not always, a dire&ion for find¬ ing them. Thefe caterpillars change their colour but very little, being nearly the fame when young as wffien old. Like many others, they are capable of fpinning as foon as they come from the egg. They alfo change their Ikin feveral times ; but as it is almofl; impoffible to rear them under a glafs, fo it is very difficult to know exadly how often this moulting takes place. Mr Adams conjectures that it is more frequently than the generality of caterpillars do, fome having been obferved to change more than nine times. The coffus generally fafts for fome days previous to the moulting ; during which time the flefliy and other interior parts of the head are detached from the old flcull, and retire as it were within the neck. The new coverings foon grow on, but are at firft very foft.—. ■When the new Ikin and the other parts are formed, the old Ikin is to be opened, and ail the members with¬ drawn from it ; an operation naturally difficult, but which muft be rendered more fo from the foft and weak ft ate of the creature at that time. It is always much larger after each change. From Mr Lyonet’s experiments, it appears, that the coffus MIC [ 33 Microfcope. coflus generally paffes at leaft two winters, if not three, ' v ' before it affumes the pupa ftate. At the approach of winter, it forms a little cafe, the infide of which is lined with filk, and the outfide covered with wood ground like very fine faw-dulf. During the whole fea- fon it neither moves nor eats. This caterpillar, at its firlt appearance, is not above one-twelfth of an inch long; but at laft attains the length of two, and fometimes of three inches. In the month of May it prepares for the pupa ftate ; the find: care being to find a hole in the tree fufficient to allow the moth to blue forth ; and if this cannot be found, it makes one equal in fize to the future pupa. It then begins to form of wood a cafe or cone ; uniting the bits, which are very thin, together by filk, into the form of an ellipfoid, the outfide being formed of fmall bits of wood joined together in all direffions; taking care, however, that the pointed end of the cafe may always be oppofite to the mouth of the hole : having finilhed the outfide of the cafe, it lines the infide with a filken tapedry of a clofe texture in all its parts, ex¬ cept the pointed end, where the texture is loofer, in order to facilitate its efcape at the proper time. The caterpillar then places itfelf in fuch a pofiure, that the head may always lie towards the opening of the hole in the tree or pointed end of its cafe. Thus it re- . mains at reft for forne time : the colour of the fkin firft becomes pale, and afterwards brown; the interior parts of the head are detached from the fkull ; the tegs withdraw themfelves from the exterior cafe ; the body fiiortens; the pofterior part grows fmall, wdiile the anterior part fwells fo much, that the Ikin at laft burfts : and, by a variety of motions, is puftied down to the tail ; and thus the pupa is exhibited, in which the parts of the future moth may be eafily traced.— The covering of the pupa, though at firft foft, humid, and white, foon dries and hardens, and be¬ comes of a dark purple colour ; the pofterior part is moveable; but not the fore part, which contains the rudiments of the head, legs, and wings. The fore-part of the pupa is furnifhed with two horns, one above and the other under the eyes. It has alfo feveral rows of points on its back. It remains for feme weeks in the cafe ; after which the moth begins to agitate itfelf, and the points are then of efiential Service, by adling as a fulcrum, upon which it may reft in its endeavours to proceed forward, and not flip back by its efforts for that purpofe. T he moth generally continues its endeavours to open the cafe for a quarter of an hour ; after which, by re¬ doubled efforts, it enlarges the hole, and preffes for¬ ward until it arrives at the edge, where it makes a full flop, left by advancing further it fiiould fall to the ground. After having in this manner repofed itfelf Jor fome time, it begins to difengage. itfelf entirely ; and having refted for fome hours with its head upwards, it becomes fit for adlion. Mr Marlham fays, that it generally pufties one third of the cafe out of the hole before it halts. The body of the caterpillar is divided into twelve rings, marked I, 2, 3, &c. as reprefented in fig. 48, 49>_ 5°r 5l- each °f which is diftinguilhed from that which precedes, and that which follows, by a kind of neck or hollow ; and, by forming boundaries to the rings, we make twelve other divifions, likevvife expref- Vol. XIV. Part I. ] MIC fed in the figures ; but to the firft of thefe the word Microfcopk ring is affixed, and to the fecond, divijion. To facili- —' tate the defeription of this animal, M. Lyonet fuppofed a line to pafs down through the middle of the back, which he called the fuperior line, becaufe it marked the moft elevated part of the back of the caterpillar ; and another, paffing from the head down the belly to the tail, he called the inferior line. All caterpillars have a fmall organ, refembling an elliptic fpot, on the right and left of each ring, ex¬ cepting the fecond, third, and laft ; and by thefe we are furniffied with a further fubdivifion of this caterpil¬ lar, viz. by lines paffing through the fpiracula, the one on the right fide, the other on the left of the caterpil¬ lar. Thefe four lines, which divide the caterpillar longitudinally into four equal parts, mark each the place under the Ikin which is occupied by a confider- able vifeus. Under the fuperior line lies the heart, or rather thread of hearts ; over the inferior line, the fpi- nal marrow ; and the two tracheal arteries follow the courfe of the lateral lines. At equal diftances from the fuperior and two lateral lines, ive may fuppofe four intermediate lines. The two between the fupe¬ rior and lateral lines are called the intermediate fupe¬ rior ; the two others oppofite to them, and between the lateral and inferior lines, are called the intermediate inferior. Fig. 48, 49. fliow the mufcles of the caterpillar, ar¬ ranged with the moft wonderful fymmetry and order, efpecially when taken off by equal ftrata on both fides, which exhibits an aftonilhing and exaft form and cor- refpondence in them. The figures fhow the mufcles of two different caterpillars opened at the belly, and fuppofed to be joined together at the fuperior lines. The mufcles of the back are marked by capitals; the gaftric mufcles by Roman letters ; the lateral ones by- Greek chara&ers. Thofe marked t are called, by M. Lyonet, dividing mufcles, on account of their fitua- tion. The caterpillar was prepared for diffeftion by being emptied, and the mufcles, nerves, &c. freed from the fat in the manner formerly directed ; after which the following obfervations were made. T he mufcle A in the firft ring is double ; the ante¬ rior one being thick at top, and being apparently di¬ vided into different mufcles on the upper fide, but without any appearance of this kind on the under fide. One infertion is at the Ikin of the neck towards the head ; the other is a little above ; and that of the fe¬ cond mufcle A is a little below the firft fpiraculum, near which they are fixed to the fkin. The mufcle marked * is long and flender, fixed bv its anterior extremity under the gaftric mufcles a and b of the firft ring, to the circumflex fcale of the bafe of the lower lip. It communicates with the mufcle c of the fecond ring, after having paffed under fome of the arteries, and introduced itfelf below the mufcle 6. The mufcle /3 is fo tender, that it is fcarcely poffible to open the belly of the caterpillar without breaking it. It is fometimes double, and fometimes triple.— Anteriorly it is fixed to the pofterior edge of the fide of the parietal fcale, the lower fixture being at the mid¬ dle of the ring near the inferior line. There are three mufcles marked |; the firft affixed E at MIC [ 34 ] MIC Microfccpe. at one extremity near the lower edge of the upper part of the parietal fcale j the other end divides itfelf into three or four tails, fixed to the fkin of the cater¬ pillar under the mufcle The anterior part of the lecond is fixed near the firft ; the anterior part of the third a little under the firft and fecond, at the fkin of the neck under the mufcle A. Thefe two laft paffing over the cavity of the firft pair of limbs, are fixed by feveral tails the edge cppofite to this cavity. In this fubjeft there are two mufcles marked 2, but fome- times there is only one anteriorly; they are fixed to the knver edge of the parietal fcale, the other ends be¬ ing inferted in the firft fold of the fkin of the neck on the belly-fide. Fig. 50. beft reprefents the mufcles /S and £; as in that figure they do not appear injured by any unnatural connexion. In the fecond and four following rings we dif- cern two large dorfai mufcles A and B. In the 7th, 9th, and 10th rings are three, A, B, and C; in the 11th are four A, B, C, and D; and in the an¬ terior part of the 12th ring are five, A, B, C, D, and E. All thefe ranges of mufcles, howrever, as well as the gaftric mufcles a, b, c, d, appear at firft fight only as a fingle mufcle, running nearly the whole length of the caterpillar ; but when this is detached from the animal, it is found to confift of fo many di- ftinft mufcles, each confifting only of the length of one of th.j rings, their extremities being fixed to the divifion of each ring, excepting the middle mufcle a, which, at the 6th, 7th, 8th, and 9th rings, has its in- fertions rather beyond the divifion. Each row of mufcles appears as one, becaufe they are clofely con- hefted at top by fome of the fibres which pafs from one ring to the other. The nmfcles A, which are 12 in number, gradually diminifh in breadth to the lower part of the laft ring : at the 8th and three following divifions they communi¬ cate with the mufcles B, and at the nth with D. In the lower part of the laft ring, A is much broader than it was in the preceding ring; one extremity of it is contrafted, and communicates with B ; the lower in- fertion being at the membrane I, which is the exterior fkin of the fecal bag. The mufcles A and B, on the lower part of the laft ring, cannot be feen until a large mufcle is removed, which on one fide is fixed to the fubdivifion of the ring and on the other to the fecal bag. The right mufcles B, which are alfo 12 in number, begin at the fecond ring, and grow larger from thence to the feventh. They are ufually narrower from thence to the 12th ; the deficiency iri width being fupplied by the fix mufcles C, which accompany it from the 7th to the fubdivifion of the 12th ring. The mufcles B and C communicate laterally with the 8rh, nth, and 12th di¬ vifions. C is wanting at the fubdivifion of the 12th ; its place being here fupplied by B, which becomes broader at this part. The firft of the three floating mufcles V originates at the firft ring, from whence it introduces itfelf under N, where it is fixed, and then fubdivides, and hides it¬ felf under other parts. The fecbnd begins at the fecond divifion, being fixed to the anterior extremity B of the fecond ring ; from thence direfting itfelf towards the ftomach ; and, after communicating with the cafe of thq corpus crajfum^ it divides, and fpreads into eight mufcles which run along the belly. The third begins Microfcope. at the third divifion, originating partly at the Ikin, and ■'v'— partly at the junftion of the mufcles B of the fecond and third ring. It direfts itfelf obliquely towards the belly, meeting it near the third fpiraculum ; and branching from thence, it forms the oblique mufcles of fome of the vifcera. The thin long mufcle 0, which is at the fubdiviffon of the laft ring, and covers the anterior infertion of the mufcle (tf) where the ring terminates, is fingle. It be¬ gins at one extremity of the mufcle (c) ; at the fore part of the ring runs along the fubdivifion" round the belly of the caterpillar, and finifhes, on the other fide, at the extremity of a fimilar mufcle C. Fig. 49. fhows the dorfai mufcles of the coffus. To view which in an advantageous manner, we muft ufe the following mode of preparation. 1. All the dorfai mufcles, 35 in number, muft be taken out, as well as the feven lateral ones already de- fcribed. 2. All the ftraight mufcles of the belly muft be taken away, as wrell as the mufcular roots (rj, and the ends of the gaftric mufcles (<•), wThich are at the third and fourth divifions. 3. At the fecond divifion the mufcle t muft be re¬ moved ; only the extremities being left to {how w7here it was inferted. The parts being thus prepared, wTe begin at the third ring ; where there are found, four dorfai mufcles C, D, E, and F. The firft one C, is inferted at the third di¬ vifion, under the mufcles 6 and a, "where it communi¬ cates by means of fome fibres w ith the mufcle f of the fecond ring ; proceeding from thence obliquely towards the intermediate fuperior line, and is fixed at the fourth divifion. As foon as C is retrenched, the mufcle D is feen ; which grows wfider front the anterior extremity : it lies in a contrary direftion to the mufcle C, and is inferted into the third and fourth divifions. The mufcle E lies in the fame direftion as the middle C, but not fo obliquely : the lower infertion is at the fourth divifion ; the other at the third, immediately under C. The mufcle F is nearly parallel to D which joins it; the firft infertion is vifible, but the other is hid under the mufcles E and G at the fourth divifion. In the eight following rings, there are only two dor¬ fai mufcles ; and of thefe D is the only one that is com¬ pletely feen. It is very large, and diminiftres gradually in breadth from one ring to the other, till it comes to the laft, fending off branches in fome places.—E is one of the ftrait mufcles of the back ; and is inferted under the dividing mufcles 0, at the divifions of its own ring. On the anterior part of the 12th ring there are three dorfai mufcles, D, E, and F. D is fimilar to that of the preceding ring, marked alfo D, only that it is no more than half the length ; terminating at the fubdivi¬ fion of its owTn ring. E is of the fame length, and differs from the mufcle E of the preceding ring only in its direftion. F is parallel to E, and ftiorter than it; its anterior end does not reach the twelfth divi¬ fion. On the pofterior part there is only one dorfai mufcle, faftened by fome ftiort ones to the fubdivi¬ fion of the laft ring, traverfing the mufcles «t ; and be¬ ing fixed there as if defigned to ftrengthen them, and tQ ( M 1 c r 35 1 MIC Microfcope.tQ vary tlieir direflion.—a Is a Angle mufcle, of which the anterior infertion is vifible, the other end being fixed to the bottom of the foot of the laft leg ; its tiie is to move the foot. The anterior part of the mufcle £ branches into three or four heads, which crofs the fuperior line obliquely, and are fixed to the Ikin a little above it. The other end is faftened to the membrane T. Fig. 50. and 51. (how the mufdes of the caterpillar when it is opened at the back. The preparation for this view is to difengage the fat and other extraneous matter, as before diredied. The firft ring has only two gaftric mufcles (c) and ( "/'#,//&>)' Sv'fr/or/™y~> >'> I fi fty) /3r//,°i/l v/t. /At //l/nr^b frrffrv/. JV1 idas^ Middle- bur^. MID [ 39 ] veal it from apprehenfion of the king’s refentment, he thaven. opened a hole in the earth, and after he had whifpered th're that Midas had the ears of an afs, he covered the place as befpre, as if he had buried his words in the ground. On that place, as the poets mention, grew a number of reeds, which when agitated by the wind ut¬ tered the fame found that had been buried beneath, and publilhed to the world that Midas had the ears of an afs. Some explain the fable of the ears of Midas, by the fuppolition that he kept a number of informers and fpies, who were continually employed in gathering every feditious wrord that might drop from the mouths of his fubjeCls. Midas, according to Strabo, died of drinking bull’s hot blood. Ihis he did, as Plutarch mentions, to free himfelf from the numerous ill dreams which continually tormented him. Midas, according to fome, w7as fon of Cybele. He built a town w'hich he called Ancyree. » Midas, Ear-JheU. See Haliotis, Conciiology Index. MID-HEAVEN, the point of the ecliptic that culmi¬ nates, or in which it cuts the meridian. MIDDLEBURG, one of the Friendly iflands in the South fea. The ifland was firft dilcovered by Tafman, a Dutch navigator, in January 1742-3 j and is called by the natives Ea-Oo-whe: it is about 16 miles from north to fouth, and in the wideil part about 8 miles from eaft to weft. T he fkirts are chiefly laid out in plantations, the fouth-weft and north-weft ftdes efpecially. The interior parts are but little cultivat¬ ed, though very capable of it: but this neglefl adds greatly to the beauty of the ifland j for here are agree¬ ably difperfed grooves of cocoa-nuts and other trees, lawns covered wdth thick grafs, here and there planta¬ tions and paths leading to every part of the iftand, in fuch beautiful diforder, as greatly to. enliven the pro- fpe£h The hills are low ; the air is delightful } but unfortunately water is denied to this charming fpot. Yams, with other roots, bananas, and bread-fruit, are the principal articles of food $ but the latter appeared to be fcarce. Here is the pepper tree, or ava-ava, with which they make an intoxicating liquor, in the fame difgufting manner as is praftifed in the Society iflands. Here are feveral odoriferous trees and fhrubs, particularly a fpecies of the lemon tribe ; and the bo¬ tanical gentlemen met with various new fpecies of plants. Here alfo are a few hogs and fowls. , There are no towns or villages } moft of the houfes are built in plantations, w'hich are laid out in different parts, with no other order than vs^iat convenience re¬ quires. They are neatly conftnnfted, but .are .lefs roomy and convenient than thofe in the Society iiles. The floors are a little raifed, and covered with thick ftrong mats. The fame fort of matting ferves to enclofe them on the windward fide, the others being open. They have little areas before moft of them, which are planted round with trees or ornamental fhrubs, whofe fragrance perfumes the air. T heir houfehold furniture confifts of a few wooden platters, cocoa-nut {hells, and pillow's made of wood, and fhaped like four-footed ftools or forms: their common clothing, with the ab- dition of a mat, ferves them for bedding. The natives are of a clear mahogany or chefnut browm, w'ith black hair, in ftiort frizzled curiS, which feems to be burnt at the tips j their beards are cut or M I £> The general ftature of the men is equal to our middle fize, from five feet three to five feet ten ^ inches 5 the proportions of the body are very fine, and the contours of the limbs extremely elegant, though fomething more mufcular than at Otaneite, which may be owing to a greater and more conftant exertion of ftxength in their agriculture and domeftic economy. Their features are extremely mild and pleafing j and differ from the old Otaheitian faces in being.more ob¬ long than round, the nofe iharper, and the lips rather thinner. The women are, in general, a few inches fhorter than the men, but not fo fmall as the lower clafs of women at the Society iilandv. The practice of punfturing the fkin, and blacking it, which is called tallowing, is in full force among the men here, for their belly and loins are very ftrongly marked in configurations more compounded than thofe at Ota- heite. The tendered parts of the body were not free from thefe punctures; the application of which, belides being very painful, muft be extremely dangerous on glandulous extremities. The men in general go almoft naked, having only a fmall piece of cloth round the loins, but fome wrap it in great abundance round them from their waift : this cloth is mar.ufaflured much like that at Ota- heite, but overfpread with a ftrong glue, which makes it ftitf, and fit to refift the wet. The women are likewdie covered from the waift downwards: they often have loofe necklaces, confifting of feveral ftrings of fmall fhells, feeds, teeth of fifties; and in the middle of all, the round operculum^ or cover of a fhell as large as a crown-piece. The men frequently wear a firing round their necks, from which a mother-oi-pearl flieli hangs down on the breaft } both the ears of the wro- men were perforated with two holes, and a cylinder cut out of tortoife-fhell or bone was ftuck through both the holes. The moft remarkable circumftance obferved of this people was, that moft of them wanted the little finger on one, and fometimes on both hands: the difference of fex or age did not exempt them. kom this amputation} for even among the few children that were feen running about naked, the greater part had already fuffered fuch lofs. This circumftance was- obferved by Tafman. Another Angularity which was obferved to be very general among thefe people, was a round fpot on each cheek-bone, which appeared to have been burnt or bliftered. On fome it feemed to have been recently made, or others it was covered with feurf, and many had only a flight mark of its former exiftence : how, or for what purpole it was made, could not be learnt. The women here, in ge¬ neral, were referved •, and turned, with difguft, from the immodeft behaviour of ungovernable feamen : there- were not, however, wanting fome who appeared to be of eafy virtue, and invited their lovers with lafeivious geftures. The language fpoken here is foft, and not unpleafing j and whatever they faid was fpoken in a kind of finging tone. Omai and Mahine, who were both paffengers on board the fhip, at firft declared that the language was totally new and unintelligible to them ; however, the affinity of feveral words being pointed out, they foon caught the particular modifica¬ tion of this dialect, and converfed much better with the natives than any on board the (hips could have done, after a long intercourfe. They have the neat- cifi Micklfe- burz. MID [ 40 ] MID Middle- eft ornaments imaginable, confifting of a number of Middle ^tt^e ^at ^c^s» at>out five inches long, of a yellow ham ” wood like box, firmly and elegantly conne£ted toge- y-—ther at the bottom by a tiffue of the ffibres of cocoa- nut, fome of which were of their natural colour, and others dyed black ; the fame fibres were likewife ufed in the making of balkets, the talle of which was high¬ ly elegant, and varied into different forms and pat¬ terns. Their clubs are of a great variety of lhapes, and many of them fo ponderous as fcarcely to be ma¬ naged with one hand. The moft common form was 'quadrangular, fo as to make a rhomboid at the broad end, and gradually tapering into a round handle at the other. Far the greater part wTere carved all over in many chequered patterns, which feemed to have re¬ quired a long fpace of time, and incredible patience, to work up j as a (harp ftone, or a piece of coral, are the only tools made ufe of: the whole furface of the plain clubs was as highly polilhed as if an European ■workman had made them with the beft itvftruments. Befides clubs, they have fpears of the fame wood, which were fometimes plain fharp-pointed flicks, and fometimes barbed with a fting-ray’s tail. They have likewife bows and arrows of a peculiar conftrutftion : the bow, which is fix feet long, is about the thick- nefs of a little finger, and when fladt forms a flight curve; its convex part is channelled with a Angle deep groove, in which the bow-ftring is lodged. The arrow is made of reed, near fix feet long, and pointed with hard wood : when the bow is to be bent, inftead of drawing it fo as to increafe the natural curvature, they draw it the contrary way, make it perfe&ly flraight, and then form the curve on the other fide. Moft of their canoes have outriggers, made of poles ; and their workmanlhip is very admirable : twro of thefe canoes are joined together with a furprifing ex- adtnefs, and the whole furface receives a very curious polifti. Their paddles have (hort broad blades, fome- thing like thofe at Otaheite, but more neatly wrought and of better wmod. They keep their dead above ground, after the man¬ ner of the Society iflands j as a corpfe was feen depo- fited on a low hut. Here were feen feveral men and women affticled with leprous difeafes, in fome of whom the diforder had rifen to a high degree of virulence : one man in particular had his back and {boulders covered with a large cancerous ulcer} which was perfedfly livid with¬ in, and of a bright yellow all round the edges. A woman was likewife unfortunate enough to have her face defiroyed by it in the moft (hocking manner; there was only a hole left in the place of her nofe ; her cheek was fwelled up, and continually oozing out a purulent matter ; and her eyes feemed ready to fall out of her head, being bloody and fore. Though thefe were fome of the moft miferable objedls that could poftibly be feen, yet they feemed to be quite unconcerned about their misfortunes, and traded as briftdy as any of the reft. MIDDLEHAM, a town in the north riding of Yorkfliire, fituated on the river Ure, 255 miles from London. It had once a caftle, where was born Ed¬ ward prince of Wales, only fon of Richard III ; and is noted for a woollen manufaflory and frequent horfe- races. Its market is on Monday ; and fairs Nov. 6, and 7. The town ftands on a riling ground ; and the 2 caftle, which was on the fouth fide, was formerly Mickllcfex, moated round by the help of a (pring conveyed in pipes from the higher grounds. . ,i MIDDLESEX, a county of England, which de¬ rives its name from its fituation amidll the three king¬ doms of the Eaft, Weft, and South Saxons. It is bounded on the north by Hertfordfhire ; on the fouth by the river Thames, which divides it from Surry ; on the weft by the river Colne, which feparates it from Buckingbamftiire ; and on the eaft by the river Lea, which divides it from Effex. It extends about 23 miles in length, but hardly 14 in breadth, and is not more than 115 in circumference; but as it compre¬ hends the two vaft cities of London and Weftminfter, which are fituated in the fouth-eaft part of the coun¬ ty, it is by far the wealthieft and moft populous county in England. It is divided into 602 liberties, containing 200 parifl\es, befides a vaft number of cha¬ pels of eafe, and 5 market towns, exclufive of the cities of London and Weftminfter. The air is very pleafant and healthy, to which a fine gravelly foil does not a little contribute. The foil produces plenty of corn, and the county abounds with fertile meadows and gardeners grounds. In a word, the greater part of the county is fo prodigioufly aflifted by the rich compoft from London, that the whole of the cultivated part may be confidered as a garden. The natural produc¬ tions are cattle, corn, and fruit; but its manufa£!ures are too many to be enumerated here, there being hardly a fingle manufa&ure praftifed in Great Britain but what is alfo eftabliftied in this county.—Though Lon¬ don is the chief city, Brentford is the county town where the members of parliament are elefted. It con¬ tains 77,712 houfe% inhabited by 130,742 families, containing 340,958 males, and 294,371 females, fo that the whole amount of its population is 635,329 perfons. MIDDLESEX is alfo the name of four different counties in the United States of America; one of them is in Maf- fachuffetts, another in Connetticut, a third in New Jer- fey, and the fourth in Virginia. MIDDLETON, Dr Conyers, a very celebrated Englifti divine, the fon of a clergyman in Yorklhire, was born at Richmond in 1683. He diftinguiftied him- felf, while fellow of Trinity college, Cambridge, by his controverfy with Dr Bentley his mafter, relating to fome mercenary conduct of the latter in that ftation. He afterwards had a controverfy with the whole body of phyficians, on the dignity of the medical profeflion ; concerning which he puDliftied De medicorum apud ve- teres Romanos degentium conditione differtctio ; qua, con¬ tra viros celeberrimos Jacobutn Sponium et Riclardum Meadium, fervilem atque ignobHem earn fuijfe ojlenditur: and in the courfe of this difpute much refentment and many pamphlets appeared. Hitherto he had flood well with his clerical brethren; but he drew the refentment of the church on him in 1729, by writing “ A Letter from Rome, (bowing an exa£l conformity between Popery and Paganifm,” &c.; as this letter, though politely W’ritten, yet attacked Popifti miracles with a gaiety that appeared dangerous to the caufc of miracles in general. Nor were his Objeflions to Dr Water- land’s manner of vindicating Scripture againft Tindal’s “ Chriftiarity as old as the Creation,” looked on in a more favourable point of view’. In 174I> came out his great work, “ The hiftory of the life of M. Tullius Cicero,” Mi <1(11 e- wich _ ii _ Mid (hip- MID [4 Cicero,” 2 vols 410 : which is indeed a fine perform¬ ance, and will probably be read as long as tafle and polite literature fubfift among us : the author has never- thelefs fallen into the common error of biographers, who often give panegyrics inifead of hifiory. In 1748, he publillied, “ A free inquiry into the miracul¬ ous powers which are fuppofed to have fubfilled in the Chriftian church from the earlieff ages, through feveral fucceflive centuries.” He was now attacked from all quarters ■, but before he took any notice of his anta- gonills, he fupplied them with another fubjeft,. in “ An examination of the Lord Bifhop of London’s difcourfes concerning the ufe and extent of prophecy,” &c. Thus Dr Middleton continued to d-'fplay talents and learning, which are highly etleemed by men of a free turn of mind, but by no means in a method calculated to invite promotion in the clerical line. He was in 1723 chofen principal librarian of the public library at Cambridge 5 and if he rofe not to dignities in the church, he was in eafy circumltances, which permitted him to aiTert a dignity of mind often forgotten in the career of preferment. He died in 175c, at Hilderlham in Cambridgefhire, an eftate of his own purchafing j and in 17^2, all his works, except the life of Cicero, were collected in 4 vols, 4to. MIDDLEWICH, a town of Chelhire, 167 miles from London. It Hands near the conflux of the Croke and Dan, where are two falt-water fprings, from which are made great quantities of fait, the brine being faid to be fo flrong as to produce a full fourth part fait. It is an ancient borough, governed by burgelfes ; and its parifli extends into many adjacent townfhips. It has a fpacious churchy By means of inland navigation, it has communication with the rivers Merfey, Dee, Ribble, Oufe, Trent, Darwent, Severn, Humber, Thames, Avon, &c. which navigation, including its windings, extends above 500 miles, in the counties of Lincoln, Nottingham, York, Lahcafter, Weftmoreland, Stafford, Warwick, Leicefter, Oxford, Worcefter, &c. The river Wheelock, after a courfe of about 1 2 miles from Mowcop-hill, runs into the Dan a little above this town. MIDHURST, a town of Suffex, 52 miles from London, has been reprefented in parliament every fince the 4th of Edward II. It is a neat fmail town, on a hill furrounded with others, having the river Arun at the bottom •, and is a borough by prefcription, govern¬ ed by a bailiff, chofen annually by a jury at a court- leet of the lord of the manor. MIDIAN, or Madian, in Ancient Geography, a town on the fouth fide of Arabia Petraea, fo called from one of the fons of Abraham by Keturah.—Ano¬ ther Midian, near the Arnon and AEoplis, in ruins in Jerome’s time. With the daughters of thefe Midianites the Ifraelites committed fornication, and were guilty of idolatry. A branch of the Midianites dwelt on the Arabian gulf, and wrere called Kemtes: fome of wdiom turned profelytes, and dwelt with the Ifraelites in the land of Canaan. MID-LOTHIAN. See Lothian and Edin¬ burghshire. MIDSHIP-FRAME, a name given to that timber, or combination of pieces formed into one timber, which determines the extreme breadth of the fhipi Yol. XIV. Part I. i ] MID as well as the figure and dimenfion of all the inferior timbers. In the article SiiiP-Bui/ding, the reader will find a full explanation of what is meant by a frame of tim¬ bers. He will alfo perceive the outlines of all the principal frames, with their gradual dimenfions, from the midflhip-frame, delineated in the plane of projection annexed to that article. MIDSHIPMAN, a fort of naval cadet, appointed by the captain of a fhip of war, to fecond the orders of the fuperior officers, and aflift in the neceffary bufi- nefs of the veffel, either aboard or affrore. The number of midfliipmen, like that of feveral other officers, is always in proportion to the fize of the flup to which they belong. Thus a firff-rate man of war has 24, and the inferior rates a fuitable numoer in proportion. No perfon can be appointed lieutenant without having previoufly ferved two years in the royal navy in this capacity, or in that or mate, beiides having been at leaff four years in aCtual fervice at fea, either in merchant drips or in the royal navy. Midlhipman is accordingly the ffation in which a young volunteer is trained in the feveral exerciles ne¬ ceffary to attain a lufficient knowledge of the machi- nprv movements, and militarv operations of a drip, to Mid fliip- qualify him for a fea officer. On his firff entrance in a ffrip of war, every midfhip- man has feveral difadvantageous circurnftances to en¬ counter. Thefe are partly occafioned by the nature of the fea fervice ; and partly by the miffaken preju¬ dices of people in general refpedting naval ditripline, and the genius of failors and their officers. No cha- rafler, in their opinion, is more excellent than that of the common lailor, whom they generally luppoie to be treated with great feverity by his officers, drawing a comparifon between them not very advantageous to the latter. The midlhipman ufually comes aboard tinc¬ tured with thefe prejudices, efpecially if his education has been amongft the higher rank of people ; and if the officers happen to anfwer his opinion, he conceives an early difguff to the fervice, fvom a very partial and incompetent view of its operations. Blinded by thefe prepofleflions, he is thrown off his guard, and very foon furprifed to find, amongff thofe honeff failors, a crew of abandoned miicreants, ripe for any milchief or villany. Perhaps, after a little obfervation, many of them will appear to him equally deffitute of grati¬ tude, ffiame, or juffice, and only deterred from the commiflion of any crimes by the terror of fevere pu- nifhment. He will difeover, that the pernicious ex¬ ample of a few of the vileft in a fhip of war is top often apt to poifon the principles of the greatell num¬ ber, efpecially if the reins of difcipline are too much relaxed, fo as to fofter that idlenefs and diffipation, which engender floth, difeafes, and an utter profligacy of manners. If the midfhipman on many occafions is obliged to mix with thefe, particularly in the exercifes of extending or reducing the fails in the tops, he ought refolutely to guard againft this contagion, with which the morals of his inferiors may be infedted. He ffmuld, however, avail himfelf of their knowledge, and acquire their expertnefs in managing and fixing the fails and rigging, and never fuffer himfelf to be excelled by an inferior. He will probably find a virtue in almoff F every M I D [ 42 ] M T D MiAfh ip- man. every private failor, which is entirely unknown to many of his officers : that virtue is emulation, which is not indeed mentioned amongft their qualities by the gentlemen of terra ftrtna, by whom their chara&ers are often copioufly deferibed with very little judgement. There is hardly a common tar who is not envious of fuperior fkill in his fellow’s, and jealous on all ocea- fions to be outdone in what he confiders as a branch of his duty : nor is he more afraid of the dreadful con- fequences of whiftling in a flbrm, than of being ftig- raatized with the opprobrious epithet of lubber. For¬ tified again!! this fcandal, by a thorough knowdedge of his bufinefs,, the failor will fometimes fneer in pri¬ vate at the execution of orders which to him appear awkward, improper, or unlike a feaman. Nay, he will perhaps be malicious enough to fupprefs his ovrn judgement, and, by a punflual obedience to command, execute whatever is to be performed in a manner which he knows to be improper, in order to expofe the perfon commanding to difgrace and ridicule. Little fkilled in the method of the fchools, he confiders the officer who cons his leffon by rote as very ill qualified Tor 1 ris flatkm, becaufe particular lituations might ren¬ der it neceffary for the faid officer to affift at putting his own orders in practice. An ignorance in this prac¬ tical knowledge will therefore neceffarily be thought an unpardonable deficiency by thofe who are to follow his diredlions. Hence the midffiipman wffio affociates with thefe bailors in the tops, till he has acquired a competent fkiil in the fervice of extending or reducing the fails, &;c. will b$ often entertained with a number of fcurrilous jefts, at the expence of his fuperiors. Hence alfo he will learn, that a timely application to thofe exercifes can only prevent him from appearing in the fame defpicable point of view, which muft cer¬ tainly be a cruel mortification to a man of the fmallelt fenfibility. If the midffiipman is not employed in thefe fervices, which are undoubtedly neceffary to give him a clearer idea of the different parts of his occupation, a variety of other objefls prefent themfelves to his attention. Without prefuming to didate the fludies which are moft effential to his improvement, vve could wiffi to recommend fuch as are moft fuitable to the bent of his inclination. Aftronomy, geometry, and mechanics, which are in the firft rank of fcience, are the mate¬ rials which form the fkilful pilot and the fuperior ma¬ riner. The theory of navigation is entirely derived from the two former, and all the machinery and move- s ments of a ftiip are founded upon the latter. The ac¬ tion of the wind upon the fails, and the refiftance of the water at the ftem, naturally didate an inquiry into the property of folids and lluids j and the ftate of the (hip, floating on the water, feems to dired his appli¬ cation to the ftudy of hydroftatics, and the effeds of gravity. A proficiency in thefe branches of fcience will equally enlarge his views, w’ith regard to the ope¬ rations of naval war, as direded by the efforts of powder and the knowledge of projediles. The moft. effedual method to excite his application to thofe ftu- dies, is, perhaps, by looking round the navy, to ob- lerve the charaders of individuals. By this inquiry he will probably dilcover, that the officer who is emi¬ nently ikilled in the fciences, will command univerfal refped and approbation 5 and that whoever is fatisfied with the defpicable ambition of fhining the hero of an ^ffembly, will be the objed of univerfal contempt. The attention of the former will be engaged in thole ftudies which are highly ufeful to himfelf in particular, and to the fervice in general. The employment of the latter is to acquire thofe fuperficial accompliftiments „ that unbend the mind from every ufeful fcience, emaf- culate the judgement, and render the hero infinitely more dexterous at falling into his ftation in the dance than in the line of battle. Unlefs the midffiipman has an unconquerable aver- fion to the acquifition of thofe qualifications which are fo effential to his improvement, he will very rare¬ ly want opportunities of making a progrefs therein. Every ftep he advances in thofe meritorious employ¬ ments vdll facilitate his acceflion to the next in order. If the dunces, who are his officers or meffmates, are rattling the dice, roaring bad verfes, hifling on the flute, or feraping difeord from the fiddle, his atten¬ tion to more noble ftudies will fweeten the hours of re¬ laxation. He ffiould recoiled, that no example from fools ought to' influence his condud, or feduce him from that laudable ambition wffiich his honour and ad¬ vantage are equally concerned to purfue. MIDWIFE, one whofe profeffion is to deliver wo¬ men in labour. See Midwifery. Midfhip- man, Midwife. MIDWIFERY, 1 Definition. r I ^HE art of affifting w’omen in labour. In a more extended fenfe, it is underftood to comprehend al¬ fo the treatment of the difeafes of women and children. In this wmrk we {hall confider it in the former limited fenfe, viz. as relating to the birth of the offspring of man. ii Hi/lory of Midwifery.—It muft be very obvious that this art muft have been almoft coeval wuth mankind : but in Europe it continued in a very rude ftate till the 1 yth century ; and even after phyfic and furgery had become diftind profeffions, it remained almoft totally uncultivated. It is a curious fad, that in the empire of China the very reverfe of this has taken place. In that em¬ pire, according to the lateft accounts, both phyfic and furgery are ftill in a ftate of the utmoft degradation, even more fo than among the favages of America; but for fome hundred years, the art of midwifery has been pradifed by a fet of men deiiined to the purpofe by order of government. Thefe men, wffio hold in fo.. ciety the fame rank which lithotomifts did in this coun¬ try about the beginning of laft century, are called in whenever a woman has been above a certain number of hours in labour, and employ a mechanical contrivance for MIDWIFERY. 43 Hiftory 4 5 * for completing the delivery without injury to the in¬ fant. A certain number of fuch individuals is allotted to each dillridf of a certain population. It is faid, that the Chinefe government was led to make this provilion for alleviating the fufferings of child-bearing women, in confequence of a reprefenta- tion, that annually many women died undelivered, and that in the majority of cafes the caufe of obftru&ion might have been removed by very Ample mechanical expedients. Both Sir George Staunton and Mr Barrow were ignorant of this fail; and the latter in particular ex- prefsly mentions, that there are no men-midwives in China. But the writer of this article had his informa¬ tion from a more authentic fource than the works of gentlemen who were only a few months in that coun¬ try, and were in a great meafure treated as date pri- foners. He has it, through the medium of a friend, from a gentleman w:ho refided upwards of twenty years as furgeon to the Britilh failory at Canton, and vvho had both the ability and the inclination to learn, during the courfe of fo long a refidence, all the cuftoms and prejudices of the natives relating to the prefervation of human health. Towards the end of the 17th century, the fame caufes which had fo long before led to the cultivation of midwifery in China produced the fame effedt in Europe. The dangers to which women are fometimes expofed during labour excited the compaffion of the be¬ nevolent ; fo that a confiderable part of the firft hof- pital which was eftabliihed for the reception of the indigent fick, the Hotel Dieu of Paris, was appropri¬ ated to lying in women. The opportunities of pra&ice which that hofpital afforded, direfled the attention of medical men to the numerous accidents which happen during labour, and to the various difeafes which occur after delivery. Pm blic teaching followed, and foon after the cutlom of employing men in the pra&ice of midwifery began. From this period the art became rapidly improved ; and it is now in many parts of Europe, and particular¬ ly in Great Britain, in as great a date of perfe&ion as phylic or furgery. In the year 1725, a profefforfliip of midwifery was eftablifhed in the univerfity of Edinburgh 5 and the town council at the fame time ordained, that no woman fliould be allowed to praflife midwifery within the li¬ berties of the city, without having previoufly obtained a certificate from the profeffor of her being properly qualified. This falutary regulation has fallen into defuetude. There can be no doubYthat the improvement of the art of midwifery vvas chiefly in confequence of medical men direfling their attention to the fubjefl} but the propriety of men being employed in fuch a profefiion is much queflioned by many individuals of confiderable refpeff ability. Dr John Gregory, in his Comparative View, p. 22. fays, “ every other animal brings forth its young with¬ out any affiftance, but we think a midwife underflands it better.” Had this eminent philofopher laid, other animals content themfelves with the clothing which providence has bellowed, but we tnink it neceffaiy to cover our bodies with the workmanlhip of w'eavers, very few in this northern climate would have attended to the fneer. His fon, the prefent profeffor, has impro- Of . ved upon the idea. He feems to fuppofe that women Conception, without any inftruflion, and of courfe without any knowledge of the fubjefl, are capable of aflfifting one another while in labour ; and in the fportivenefs of his lively imagination, he compares men-midwives to that fpecies of frog, in which, according to the allega¬ tion of Reaumur, the male draws out the ova from the female, or, to ufe the naturalill’s words, “ accouche la feme lie?' It appears to us that this queftion, on which much declamation has been employed by the parties who have agitated it, may be brought within a very narrow compais. It may be affumed as a faff eftablifhed be¬ yond the reach of controverfy, that fometimes dangers and difficulties occur during labour (from caufes to be explained in a fubfequent part of this effay), which can be leffened or removed by thofe only who have an inti¬ mate knowledge of the ftrufture of the human body and of the pradlice of phyfic. On fuch occafions, it muft be admitted, medical men alone can be ufeful. But as Inch labours occur only in the proportion of two or three in the hundred, the general pradlice might be confided to midwfives, if they could be taught to manage ordinary cafes, and to forefee and diftinguilh difficulties or dangers, fo as to procure in fufficient time additional affiftance. It is on this point that the decifion of the queftion muft depend. It confifts with the knowledge of the writer of this article, that women may be taught all this. But there are many who allege, that a little knowledge being a dangerous thing, midwives acquire a felf-fufficiency which renders them averfe from call¬ ing in fuperior affiftance, and that, in confequence, they often occafion the moll, deplorable accidents both to mother and child. In England this is the popular opi¬ nion, fo that there women are almoft entirely excluded from the practice of midwifery. x\ fimilar prejudice again!! midwives has, it is believed, begun in fome parts of Scotland; but it is prefumed this will gradually ceafe, when it is confidered that, in general, the Scotch midwives are regularly inftrudled, and are at the fame time both virtuous and induftrious. If they attend ftridlly to their duty, and invariably prefer their patients fafety to their own feelings or fuppofed intereft, they will defervediy retain the public confidence. But if in cafes of difficulty or danger they trull to their own exertions, or from interefted motives decline the affift- ance of able prailitioners, and if they interfere in the treatment of the difeafes of women and children, they will in a few years be excluded from praflice. Divifon of the fubjeSl. In order to exhibit an ac- 7 curate view of what relates to the birth of man, we fliall confider, in the firft place, conception j fecondly the effefts of impregnation j thirdly, the aft of childbearing; and laftly, the deviations from the ordinary courfe which fometimes happen. Thefe topics will form the fubjefts of the following chapters. Chap. I. Of Conception. Three circumftances are required for conception in * the human race, viz. puberty; a healthy, vigorous, and natural Hate of the parts fubfervient to the operation in both fexes ; and fuccefsful fexual intercourfe. 1. The age of puberty in women differs confiderably F 2 in 44 M I D W I F E R Y. Chap. I. Of Conception 9 31 in different climates. In Europe it takes place com¬ monly between the fourteenth and fixteenth year. This important era is marked by certain changes both in the mind and body. The girl feels fenfations to which fhe had been formerly unaccuftomed. She lofes a relifh for her former amuiements, and even for her youthful companions. She feeks folitude, indulges in the de- preffing paffions, and thefe are excited by the moft ap¬ parently trilling caufes. She'feels occaiionally certain delires which modefty repreffes; and it is by degrees on¬ ly that fhe regains her former tranquillity. The changes in her body are even more flrongly marked than thofe in her mind. Her breads affume that form which adds to the beauty of her perfon, and renders them fit for Rourifhing her infant j and every part of the genital fyftem is enlarged. A periodi¬ cal difcharge from the uterus renders the woman perfect. In young men the fame caufes produce very different effects. The lad, about fifteen or fixteen, feels a great incr; afe of ftrength; his features expand, his voice be¬ comes rough, his ftep firm, his body athletic 5 and he engages voluntarily in exercifes which require an exer¬ tion of ftrength and activity. The changes in his mind are as ftrcngly marked as thofe in his body. He loies that reftlefs puerility which had diftinguifhed his Carly years, and becomes capable of attending fteadily to one object. His behaviour to the fair fex is fudden- ly altered. He no longer fliews that contempt for wo¬ men, which he had formerly betrayed. He is foftened, approaches them with deference, and experiences a de¬ gree of pleafure in their company, for which he can fcarcely account. In him too there is an important change in the condition of the genital organs. 2. Unlefs the parts which conflitute peculiarity of fex be in a healthy, vigorous, and natural ftate, concep¬ tion cannot take place. In women, conception is prevented if the organs be too much relaxed ; if there be obltrudlion between the external and internal parts j if any preternatural dif¬ charge take place from the internal parts j if the men- fliua! evacuation be not natural in every refptft, and if the appendages of the uterus, called fallopian tubes, and ovaria, be not of the natural flruflure. In men, the fame circumftance happens if the organs be too much relaxed ; if the orifice of the urethra be in an improper fituation j if the urethra be difeafed ; if the teftes be not in a natural healthy ftate ; and if there be any defedl in the ereflores penis, which prevents the proper eredlion of that organ. 3. The fexual intercourfe cannot be fuccefsful unlefs fomewhat r.eceffary for conception be furnilhed by both fexes. This confifts in the male of a fluid fecreted by the teftes j and in the female, of the detachment of a fubftance, fuppofed to refemble a very minute veficle fnuated in the ovarium, and called by phyftologifts ovum. Each ovarium contains a number of thefe vefi- cles. After every conception, certain marks of the detachment of the ovum remain in the refpe£live ovarium. Wh rn the circumflances required for conception con¬ cur, a being is produced which generally refembles both parents. This refemblance is moft ftrikingly marked in the human fubjeft, when one of the parents is an European, and the other an African. What is Of called a mulatto is produced. Conception. The human rftce poffeffes the power of propagation in common with all the other fpecies of the animal kingdom, and alfo, it has been faid, with the vegetable kingdom. As generation then, as it has been ftyled, is com¬ mon to two of the kingdoms of nature, it has been ima¬ gined by ingenious men, that this wonderful operation is regulated in both by a certain general lav/. But they have differed much in their account of this law. The queftion at iffue between the two parties is whether the embryos of animals be prepared by the fexual in¬ tercourfe out of inorganic materials, or whether they pre-exift in the bodies of animals, and are only deve¬ loped as it were by that intercourfe. The former of thefe opinions is called the dodfrine of epigenefis, the latter that of evolution. Both dodtrines have been maintained with much in¬ genuity by equally relpediable authorities. Negative arguments have been adduced in favour of the one, pofitive in fupport of the other, and it mutt be confefs- ed that the balance between them feems nearly equal. The pre exiftence of ova in the oviparous animals ap¬ pears a pofitive argument in favour of evolution 5 but the fatirical remark of a late witty author, * that, were ' this theory true, every individual of the human race muft have been lodged in the ovaria of our firit parent, by affording a negative argument in favour of epigeneli^ reft ores the balance. The various arguments advanced on each fide by the oppofite parties in this difpute are fo very numerous, that we cannot attempt to detail them in this work j and on a fubjedt which has divided the opinions of fo many able phyfiologifts, it would be prefumption to de¬ cide peremptorily. If generation be regarded as an animal operation, one is led to inquire whether the produdt be the refult of the combined influence of both fexes, or whether it be produced by either fex alone. The firft opinion was generally adopted by phyfiolo- 13 gifts, till about the end of the 17th century, when an accidental difeovery convinced many that the embryo was produced by the male parent alone •, and another difeovery fome years afterwards again overturned that opinion, and rendered it believed by not a few that the embryo is furnilhed exclulively by the female parent. Several circumftances concurred to render the firft opinion probable *, the ftrudture of the organs which con- ftitute peculiarity of fex in both parents, the circum¬ ftances neceffary for fuccefsful impregnation, and the fimilitude of children to both parents, appear very ftrong arguments in its favour. The fecond theory, although firft brought into vogue 14 about the end of the 17th century by the difeoveries of Leeuwenhoeck, had been foimerly propofed by the fol¬ lowers of Pythagoras. Their argument w'as analogy : the feed, faid they, is fown in the earth, nourilhed and evolved there ; fo the male femen is fown in the uterus, and in the fame manner nouriihed and evolved. Leeuwenhoeck’s difeovery feemed a more cenclufive argument in favour of the theory than vague analogy. He M I D W obferved innumerable aijimalcula in the feminal Thefe he imagined IS Chap. T. Of He Conception Qf t’ne maies 0f many animals. » ^ to be embryos. But as animalcula of apparently the fame nature have been obferved in many animal fluids befides the fe- men mafeulinum, the opinion of Leeuvvenhceck and the theory itfelf are overturned. It was owing principally to the labours, induftry, and ingenuity of Baron Haller, that the third theory, that of the pre exifting germ, became falhionable. His obfervations feem to contain a demonftration of the fa£l. Thofe who have adopted this theory, imagine that the femen mafeulinum poffefles the power of flimulating the various parts of the pre-exifting embryo. And hence they explain the ftmihtude to both parents, and particularly the appearance of the hybrid productions, to that fluid nouiifhing certain parts, and new-arranging others. But if this were true, then the femen mafeuli¬ num of all animals fliould poffefs the power of ftimulat- ing the forms of all female animals •, and befides, in each clals of animals it ftiould poffefs certain fpecific powers of giving a dire&ion to the growth of parts. Experi¬ ment, horvever, has not proved this to be the cate, for the hybrid produ&ions are very limited •, and we may be permitted perhaps, without the imputation of arro¬ gance in pretending to fearch into the intentions of the Author of nature, to obferve, that had the femen maf¬ eulinum been pofleffed of fuch powers, the whole Ipe- cies of animals would have been foon confounded, and the whole animal kingdom would loon have returned to that chaos from which it has been allegorically laid it originated. Yet we are reduced to the alternative of either re- jefting the theory, or of believing that the femen does pofiefs the powers alluded to. If we examine attentive¬ ly the anatomical dilcovery on which this theory is built, we lhall perhaps be inclined to believe that the foundation of the whole is very infufficient •, and hence to conclude that the great fuperftructure is in a very tottering condition. If it be poflible that the attach¬ ment of the chick to the yolk of the egg Ihould be in confequence of inofculation, the theory mull fall to the ground. Haller has endeavoured to obviate this objec¬ tion, but not with his ufual judgement. Two circumftances, however, feem to (how that the attachment is really by inofculation : I. That veflels are feen in the membrane of the yolk evidently con¬ taining blood before the heart of the chick begins to beat •, yet thefe veftels afterwards appear to depend on the vafcular fyftem of the chick. And 2. lhat in many animals, as in the human fubjeft, the umbilical cord feems to be attached to the abdomen by inolcula- tion ; for there is a circle round the root of the cord which refembles a cicatrix, and within a few days af¬ ter birth, the cord uniformly drops off at that very circle, whatever-portion may have been retained after delivery. There is one obje&ien equally applicable to all the three theories, viz. the difficulty of explaining the fteps of the procefs. A variety of explanations have been offered by ingenious men. Spallanzani and IMr John Hunter lately, Haller and Bonnet formerly, have rea- In treating of this fubjeft, we ffiall firft confider the term of geftation j 2dy, the phenomena of natural par¬ turition ; and 3dly, the caufes of thofe phenomena. Sect. I. Term of Gejlation. 45 The ancients imagined that although nine kalendar months be the moft ufual pep’od of human pregnancy, yet on lome occafions that period maybe, and adluallyis, pro* tradled even beyond ten kalendar months. Accordingly, itlwas laid down as a maxim in ancient jurifprudence, that children born within eleven months after the death of their fuppofed father ffi.ould be declared legitimate. In modern times the queftion has been often agitated, both among medical pra u^er which another pain ta- iln§ P^ace, the face is turned to one thigh and the ihouiders of the child being placed towards pubis and lacrum, the whole of the body is born. During this pro- cefs the patient generally adds voluntary efforts to the contractions of the uterus. ihis itage is in many inflances extremely tedious; but after the woman has had one child, it often is com* pieted within the time of fix or eight pains. 5r 1 henomena of the 'Ihird Stage.-—Whenever the in¬ fant is born, if there be no other in the womb, the pa- netes of the abdomen become relaxed, arid the womb can be perceived through them, contracted almoit into the fize of a child’s head. An interval of eafe of fome minutes duration now elapfes, after which pains again recur, commonly attended with the difeharge of fome clots of blood, occafioning a kind of gurgling noife, and the placenta and membranes are thrown off, and the womb remains quite contracted or nearly fo, with a cavity fcarcely capable of containing a hen’s egg. In fome cales a fingle pain accomplilhes this, and in others leveral pains are required ; but generally fpeak- ing, this ftage is completed within an hour after the birth of the child. It fometimes, however, happens that the natural efforts are inadequate to the expulfion of the fecun¬ dities. . T he caules are, want of fufficient contraCtile power in the uterus, irregular contradion of that or¬ gan, and indurated flate of the placenta itfelf. From the above defeription it is obvious that all the three ftages of labour are completed by one fimple power, viz. the contraction of the womb. S? Sect. III. Catfes of the Phenomena of Labour. I. The firft phene non which requires explanation is the aCtion of the uterus. Why does that organ gene¬ rally aCt at a certain period, after having remained in a quiefeent Hate for fo long a time ? 1 his queftion has puzzled phyfiologilts ftrangely. Some have attributed the circumftance to a ftimulus communicated by the foetus : but their opinion is over¬ turned by a well-known faCt, that the fame phenomena occur though the foetus be dead. Others have imagin¬ ed that the uterus is excited to aCt in confequence of previous diftenfion. But were this the cafe, women fhould never have the uterus of a larger bulk in one pregnancy than in another ; whereas, on the contrary, it is well known that wmmen who have twins or triplets often have the womb diftended to fully double the ufual fize. Phyfiologifts as w^ell as phyficians have fallen into very great errors from referring complex phenomena to a fingle caufe. A variety of fads concur to prove, that in the prefent inftance it is abfurd to impute the aClion of the uterus to any fingle caufe. I o w’hat then ftiould we attribute it ? To a variety of circumflances. iff, To Che ftru&ure of the uterus. From the ap¬ pearance of that organ in its unim^regnated flate, it would feem that nature had laid up in ftore a certain proportion ol fibres to be developed during pregnancy, I b E R Y. Chap IH. When thefe fibres are evolved, if the uterus be diftend- Natural ed iarther, the edges of the os tincae muff be feparated, Parturition, in confequence of which part of the uterine contents v~" paffmg through it, the contraaion of the uterus follows. A fa Cl very familiar to praditioners of midwifery af¬ fords apparently a complete confirmation of this hypo- tnelis, viz. that in fome women labour occurs as regu¬ larly and naturally, in the feventh or eighth month of gelfation, as in others it does at the end of the ninth, the cervix uteri having become quite obliterated. 2d, It is probable, however, that in ordinary cafes this ftore of mufcular fibres is feldom entirely exhaufted. from the circumftance of women having fometimes twins or triplets; fome other caufe therefore muft concur in exciting the aClion of the uterus. The contents of the uterus perhaps furnilh this caufe. In the latter months of geftation, fome parts of the foetus come in conta& with the parietes of the uterus, in confequence of the decreafe in proportion of the li¬ quor aninii. This is principally the cafe with refpeCl to the head, which preffeson the cervix, and that part of the uterus, it is probable, is more irritable than anv other; for w^e find that the entrance or exit of all hol¬ low mufcular organs is more irritable than the other parts, as we fee exemplified in thecardiaof the ftomach, and in the cervix of the urinary bladder. 3d, It is not improbable too, that the preffure of the neighbouring parts contributes fomewhat to in¬ duce the a6Hon of the uterus ; for it is remarked by praaitioners of midwifery, that women feldom arrive at the full period of geftation in a firft pregnancy, and the parietes of the abdomen yield with difficulty' at firft, as is obferved in cafes of dropfy. Befides all farmers know well, that in every fucceeding pregnancy, cows exceed their former period of geftation. II. The next phenomenon worthy of notice is the manner, in which the child’s head enters the pelvis. Two circumftances contribute towards this, firft the connexion of the head of the child with the neck; and 2dly, The form of the brim of the pelvis. The firft of thefe circumftances has been accurately pointed out by Dr Offiorn. He fays, “ after the os uteri has been firft opened by the membranes and con¬ tained. waters, forming a w^edge-like bag, the next operation and effedl of the labour-pains or contractions of the uterus (for they are convertible terms) muft be on the body of the child, which being united to the bafs of the cranium at the great foramen and nearer the oc¬ ciput than forehead, the greater preffure will be applied to the occiput, which being likewife Imaller, and ma¬ king lefs refiftance, will be the firft part fqueezed into the cavity of the pelvis (e).” The latter circumftance has been clearly explained by Pro.feffor Saxtorph. He remarks, “ caufa hujus di- rectionis capitis, concurrente toto mechanifmo perfedti partus, potiffimum haeret in pelvi. Nam agente utero in fee turn,, in axi pelvis locatum, caput ejus hucufque liberum,, in humore amnii fluduans, propter molam fuam majorem in introitum ipfo pelvis magnam refiften- tiam patitur h .prominentia ? offis facri, quae in pofteriori parte fegmenti inferioris uteri ita impreffa eft, ut pro- montorii (E) Eflays on the PraClice of Midwifery, &c. by William. Offiorn, M. D. Chap. III. Natural montorn inftar foetus frontem glabram, rotundam, unico Parturition pUnft0 tantummodo illam tangentem et fatis mobilem, y_ blando motu ad latus dirigat, in fpatium ei exafte re- fpondens inter protuberantiam ipfam et marginem in¬ ternum acutum ilii excavatum, quam ob rem, fincipitis praevii futura fagittalis cadit neceffario in diametrum obliquum aperturae fuperioris pelvis (f).” It is remarkable, that neither of thefe celebrated au¬ thors difcovered that a combination of both the circum- flances juft enumerated, is neceflfary to occafion the phenomenon. Two advantages refult from this pofition of the head of the child j for, ill, The largeft part of the head is applied to the wideft part of the fuperior aperture 5 and, 2dly, The head, when the occiput is forced foremoft, occupies the leaft poflible fpace. £4 III. The phenomenon which next ftrikes us, is that change in the pofition of the head by which the face is turned into the hollow of the facrum. Although the advantage, and even neceffity, of this change in the pofition of the head, has been long known to practitioners ; yet Dr Olborn is, perhaps, the firft author who has clearly explained the efficient caufe of this. His remarks are thefe : “ As it (viz. the head) defcends obliquely through the pelvis, the preffure of the two converging ifchia will not be exaftly oppofite to each other on the two parietal bones ; but one if- chium aCling or preffing on the part of that bone con¬ tiguous to the occiput, and the other on the oppofite fide next to the face, the head being made up of dif¬ ferent bones, united by membranes, and forming va¬ rious futures and fontanels, which permit the ffiape to be changed, and the volume to be lef[ened, it neceffa- rily follows, that the head, thus cbmpreffed, will take a ffiape nearly refembling the cavity through which it paffes ; and, as from the convergency of the ifchia, the cavity of the pelvis fomewhat approaches the form of a cone, the child’s head is moulded into that ffiape, the fhape of all others beft adapted to open the foft parts, and make its way through the os externum. This un¬ equal preffure of the two ifchia upon the head, will, in the firft inftance, direCl the occiput, or apex of the cone, to turn under the arch of the pubis, where there is little or no refiftance ; while the preffure of the other ifchium, in its further defcent, will have the fame ef- fe61 on the other fide, and direft or compel the face to + Dr Of turn 'nto t^ie han°w of the facrum f.” bomfoc. This change of pofition is produclive of three advan- cit. p. 30. tages. ift, The largeft part of the head is again adapted to the wideft part of the pelvis. 2dly, The fmalleft poffible furface of the head is ap¬ plied to the furface of the bones of the pubes. And, 3dly, As Dr Ofborn, in the paffage quoted, very juftly obferves, the head is moulded into that fhape which is beft calculated to pafs without doing harm, through the foft parts. IV. The phenomena which occur when the head paffes through the external parts, are eafily explained. After the head has made that turn, by which the face is placed in the hollow of the facrum, the coccyx 53 and perinaeum refill its further defcent in that direflion, Natural and by forcing the nape of the neck againft the inferior ^ tu’lUon' edge of the fymphyfis pubis, every fucceffive pain con¬ tributes to make the occiput rife up towards the abdo¬ men, by which the chin leaves the top of the thorax, on which it had refted during the preceding prpcefs of delivery. By this fimple mechanifm, the foft parts are gra¬ dually prepared for the paffage of the child, wffiile, at the fame time, the ffioulders are brought into the moft favourable pofition for paffing through the pelvis. V. The phenomena of the third ftage of labour ob- 56' vioufly originate from the contradfion of the uterus, which both feparates and expels the fecundines. Some authors have imagined that nature has provided for this purpofe a particular apparatus, placed at the fundus uteri ; but as the placenta, when attached to the cer¬ vix uteri, is thrown off as readily as when it is attached to the fundus, it is very evident that thefe authors have been deceived by a feeming regularity of fibres, which is fometimes obferved. Laftly, The obftacles which nature has oppofed to 55- the paffage of the child, occafion all the difficulties of human parturition. Thefe obftacles are formed by the fituation and ffiape of the pelvis, and the ftrudture of the foft parts concerned in parturition. The pelvis is fituated in fuch a direblion, that its axis forms an obtufe angle with that of the body ; con- fequently, it is not placed perpendicularly, but oblique¬ ly to the horizon 5 and hence nothing can pafs through it by the force of gravity. The fliape of the pelvis, too, is fuch, that the head of the child cannot pafs through the outlet in the fame direction in wdiich it entered the brim ; and, from the ftruflure of the foft parts concerned in parturition, they yield with confiderable difficulty. By thefe means, the Author of our exiftence has guarded againft the effecfts of the erect pofture of the body, and has prevented the premature expulfion of the child and the hidden laceration of the foft parts. Sect. IV. Treatment of Natural Labour. 55 $ Firflfage.—When this ftage proceeds naturally and regularly, there is very little elfe to be done, after having afcertained that labour has really begun, and that the child is in the ordinary pofition, than taking care that the bowels be open, and palliating any un- pleafant fymptoms, fuch as Ihivering or vomiting, &c, which may occur. But if after the pains have become fo regular as, by their continuance, to difturb the ordinary functions of life, that is, moft commonly, after they have been quite regular for twelve or fifteen hours 5 if this ftage be not completed, it is neceffary to interfere, and to endea¬ vour, by art, to effect the dilatation. The reafon for this rule is abundantly evident. If this ftage of fuffer- ing be longer protradled, the ftrength of the patient muft be exhaufted by the long-continued exertion, and, of courfe, the remaining procefs of labour cannot be completed. Hence the child may be loft, or alarming difcharges M I D W 1 F E R Y. (f) Differtatio inauguralis de Diverfo Pa tu, &c. Auflore Matthia Saxtorph. Hafniae, 1771. p= 19 54 Natural difcliarg€S of blood may follow the birth of the in- tiou. fant> ^ This very obvious eifefl: of the protraction, beyond certain limits, of the firit ftage of labour, was firft pub¬ licly infilled on by the prefent profefibr of midwifery in the univerfity of Edinburgh. The means to be adopted for completing the dilata¬ tion, when that affiftance becomes necefiary, are vene- ieClion or opiates, or fupporting the os uteri, according to circumfiances. When the refifianre to the opening of the womb Eudfes from the premature difcharge of the w ater, or from natural rigidity of the w'ornb, copious blood-let¬ ting affords the adequate remedy. But if the patient be already reduced by previous difeafe, fo that fire can¬ not fafely be bled, an opiate, in the form of glyfter, ought to be adminiflered. And w'hen, on the recurrence of every pain, the mouth of the wTomb is forced down upon the external paffage before the child, its edges ought to be fupport- ed, injitiiy by the fingers cautioufly applied to each fide. ^ SecondWhen it is found that the head has be¬ gun fairly to enter the pelvis in the natural direClion, no afiiftance is neceffary till the perineal tumour be formed; and then fuch fuppert muff be given to the protruded parts as lhall both relieve the diftreffing feelings of the patient, and, at the fame time, prevent any laceration from happening. Of courfe, the precife manner of fupporting the perinseuin muff be varied according to the circumrtances of the cafe. Inattention to this has very frequently occafioned the mott deplorable acci¬ dents. After the bead is born, it muff be afcertained whether there be any portion of the navel-ftring round the neck of the infant, and if there be, it muff be flackened or drawn over the head, otherwife the infant will be loft. If poffible, time fhould be allow'ed for the accommo¬ dation of the fhoulders, and the expulfion of the body of the infant j and, at any rate, the utmoft attention fhould be paid to fupporting the perinseum during that part of the procefs. ThirdJlage.—When the child is born, and it is af¬ certained that there is no other infant remaining in the womb, the patient fhould be allowed to reft for a little, unlefs pains again come on, by which the fecundines are feparated. In that cafe, the cord is to be firmly grafped, and pulled gently, till the placenta be brought down to the external parts, when it is to be drawm out carefully, in fuch a manner as to bring off at the fame time the complete membranous bag. Should pains not recur at the diftance of an hour af¬ ter the birth of the infant, it becomes neceffary, for fe- veral reafons, to introduce the hand into the womb to feparate and extradl the fecundines. Firft, If the cord were pulled by before the womb had contrafled, or the after-birth had be¬ come feparated, the womb muff inevitably be turned infide out; an accident that has occafionally hap¬ pened. Secondly, If a longer period than an hour were fuf- fered to elapfe, the paffages would become fo much •ontraded, that the force required again to dilate M I D W I F E R Y. Chap. IV. them, ■would produce inflammaticn, with all its alarm- Natural ing confequences. Parturition. Thirdly, If the after-birth wrere allowed to remain longer than an hour, exceffive flooding might take place, which w’ould foon prove fatal. Fourthly, Were the patient to efcape the danger of flooding, Ihe would incur that of putrefadion of the placenta, which is equally, though not fo rapidly, pro- dudive of mortal event. In thus introducing the hand to feparate the placen¬ ta, the two great cautions to be attended to, are to ap¬ ply the fingers to the fubftance of the placenta, n6t to infinuate them between its furface and that of the ute¬ rus, and to bring off only that portion of the pla¬ centa which can be feparated from the uterus without force. ' W hen any alarming circumftance happens after the birth of the infant, requiring the extradion of the pla¬ centa, the praditioner is not to delay for an hour, indeed not for a minute, giving the requifite aflift- ance. Chap. IV. Of the Deviations from Nature in Hu- man Parturition. From the view thus given of human parturition, un¬ der the moft favourable circumftances, it muff be ob¬ vious that many deviations from nature may occur. Thefe deviations may proceed ; firft, from the pro¬ pelling powers concerned in parturition j fecondly, from the ftate of the fecundines; thirdly, from the Hate of the child itfelf 5 or, fourthly, from the ftate of the paf¬ fages through which the child is forced. There may al- fo be a combination of thefe caufes. We (hall confider each of thefe caufes of deviation in the order juft enu¬ merated. But as a minute inveftigation of the fubjed: would far exceed the neceffary limits of this work, we fhall treat each of thefe caufes as ftiortly as poffible, and notice only the moft linking circumftances. Sect. I. Of the Deviations from Natural Labour, g* which proceed from the Propelling Powers, The propelling powers concerned in parturition con- fift of voluntary and involuntary mufcular adion. The diaphragm and abdominal mufcles furnilh the for¬ mer, and the uterus the latter. An excefs or diminution of the adion of thofe powers mull interrupt the ordinary progrefs of labour. a. The violent adion of the diaphragm and abdomi- 63 nal mufcles, if exerted at the beginning of labour, tends to ex haul! the patient and to retard delivery, and if in¬ duced when the head is within the vagina may, pro¬ vided proper precautions be not taken, lacerate the perinaeum, and render the future life of the patient miferable. T he adion of thefe mufcles being quite voluntary, may be readily prevented by the patient fubmitting to proper advice. b. Impaired adion of the diaphragm and abdominal 64 mufcles, generally originates from the improper exer¬ tion of thofe mufcles at the beginning of labour, or from paffions of the mind. It always retards delivery, and confequently protrads the fufferings of the patient. c. Violent 3 Chap. IV. M I D W Preterna- c. Violei.t a^ion of tlie uterus at tlie beginning of tural Partu-]akourj js frequently produftive of much mifchief. It rit!^in' exhaufts tbe patient, and renders the fubfequent procefs 65 of delivery exceedingly tedious and difficult. It al- fo fometimes occafions an accident which generally proves almoft immediately fatal, viz. rupture of the uterus. This accident has been defcribed by authors under the title of fpontaneous rupture of the uterus. The lacera¬ tion in the uterus in thofe cafes is fometimes tranfverfe and fometimes longitudinal. When the accident happens from this caufe, the laceration is moft frequently in the cervix. The accident is preceded by excruciating pain, efpe- cially during the aftion of the uterus, at one part, as in the loins or towards the pubes; and it is announced by a mod agonizing increafe of the pain fucceeded by violent vomiting, the difcharge of a little blood, a total ceffation of the labour throes, • very great irregularity and feeblenefs of the pulfe, cold fvveat, coldnefs of the extremities, difficulty of breathing, inability to lie in the horizontal poflure, and fometimes delirium. Along with thefe fymptoms, it often happens that the prefent- ing part of the child recedes entirely, and the limbs of the infant may be readily diftinguifired through the pa¬ rities of the abdomen. But this circumftance does not always take place, for fometimes the head of the child is fo firmly wedged within the pelvis, that it does not recede although the other parts be in the cavity of the abdomen. The rupture of the uterus is generally fatal. A few cafes, however, are on record, where, by prudent ma¬ nagement, the patient, even under fuch dangerous cir- curnflances has been faved. Such are the cafes record¬ ed by Dr Hamilton (h), by Dr Douglas (i), and Dr Hamilton, junior (k). But the injuries which muft enfue from lofs of blood, acute pain, the prefence of the child in the cavity of the abdomen, and the probable protru- fion and ftrangulation of the inteflines are fuch, that it cannot be expefted that many patients can furvive the accident. The caufe of violent aftion of the uterus at the be¬ ginning of labour, is obvioufly the premature difcharge of the liquor amnii. By this*circumftance, the body of the child comes in contaft with the parietes of the uterus, by which the aftion of that organ is imme¬ diately and violently excited. How much mifchief then may the rafh interference of an ignorant operator produce ? The caufe of rupture of the uterus from its own vio¬ lent adlion, is the refiftance to the paffage of the child, either from undilated os uteri, or from deformities of the pelvis, or from wrrong pofition of the child. When¬ ever, therefore, the rupture is threatened, means mull be inllantly adopted to remove the refiftance, or to fuf- pend the aftion of the uterus. The former is in general the more eafily accomplifiied. When the uterus has actually burft, the only chance which can be afforded to the patient, is inftant delivery; per vias naturales, where that is practicable -7 and where 66 I F E R Y. ~ 55 there is extreme narrownefs of the pelvis, by an incifion Preterna- through the parietes of the abdomen. A cafe wdiere^^V1111' this latter practice was fuccefsfully had recourfe to oc- curred a few years ago in Lancafhire. Violent aCtion of the uterus during the latter flage of labour, although not productive of the fame dangers which enfue from it at the beginning, is by no means exempt from hazard ; for if the fuft parts be rigid or not fufficiently relaxed, the woman may be miferably torn. The violent aCtion of the uterus towards the termi¬ nation of labour proceeds from fome power of that or¬ gan itfelf, or from the flimulus communicated by the pofition of the child. This circumftance, however, is fometimes beneficial; as, for inftance, when the child is in an unfavourable pofition. Dr Denman was the firft who difcovered this effeft of violent uterine aClion, and publilhed it in the fifth volume of the London Medical Journal, page 64. d. Impaired aftion of the uterus during the firft ftage of labour is in many inftances produftive of no other inconvenience than the protraclion of labour ", but if it exhaufts the ftrength of the patient, it influences materially the fubfequent procefs, as already ftated. When it occurs during the fecond ftage, it occafions the moft dangerous fymptoms. Firft, If the head of the child continue to prefs for a confiderable time on the foft parts within the pelvis, thefe parts muft neceffarily from the impeded circulation become fwelled, and con- fequently the aCtion of the uterus, though it fliould re¬ turn, would then be totally infufficient for the expul- fion of the child. This efteCi of the protraClion of the fecond ftage was firft pointed out to the public in Dr Hamilton’s Letters to Dr Ofborne. It merits moft par¬ ticular attention ■, not only as it is one of the moft fre¬ quent caufes of the lofs of the infant during labour, and of confiderable danger to the parent, but alfo as it may be very readily prevented by an attentive practitioner. Previous to this fwelling becoming fo confiderable as to impede theprogrefs of the infant, there is a tendernefs and heat, and drynefs in the paflage, which announces the aftual commencement of the inflammation. Im¬ mediate delivery ought then to be iiad recourfe to. Many difagreeable fymptoms alto proceed from the fame caufe, fuch as fuppreflion of urine, and violent cramps in the lower extremities. When it is afcertained, that, in confequence of the de¬ ficiency of aCtion of the uterus, the child is detained fo long in the paffage as to endanger the health or life of the mother, it becomes neceffary to extraCt the infant by mechanical means. Two contrivances have been thought of for this purpofe, viz. the veCtis or lever, and the forceps. Roonhuyfen, a Dutch praCtitioner, who flouriflied about the beginning of the 18th century, contrived the veCtis, and from the great fuccefs which attended its ufe in his hands, an ediCt was iffued by the ftates-ge- neral, that no furgeon fliould praClife midwifery with¬ out 67 (h) Outlines of Midwifery, p. 348. (1) Obfervations on the rupture of the gravidutenus, &c. by A. Douglas, M. D. &c. 8vo. London 1789* (k) Seleft Cafes of Midwifery, p. 138. MIDWIFERY. Pretcrna- out being poUtlTed of tbe Roonbuyfen fecret, for the in- turalPartu-^rument was not publicly known. In the year 1756, 1 t ^ ' however, the fecret having been purchafed bv two li beral-minded phylicians, Vifcher and Van de Poll, was publifhed by them for the benefit of mankind. Since that time, the infhument has undergone a variety of al¬ terations in its form ; for a particular account of which, the reader is referred to Mulder’s Hidoria Forcipis. There can be no doubt that Roonhuyfen and his fucceffors employed the vedtis as a lever of the hrft fpe- cies, the head of the infant being the refiftance, the parts of the woman the fulcrum, and the hand of the operator forming the moving power. The injuries ari- fing from this praftice have been well explained by Dr Ofborne in his Effays on Laborious Labours. Al¬ though Dr Bland and Dr Denman (till recommend the fame practice, there can be no doubt that wdienever the ufe of the veflis proves fuccefsful according to their dire£tions, the fortunate termination is to be attributed to the adtion of the uterus being exerted by the preiTure of the inftrument *, or in other words, the delivery might have been completed without any mechanical in¬ terference at all. On the other hand, whenever the adlion of the uterus is either quite fufpended or much weakened, both mother and child fuflfer from the appli¬ cation of the vedtis. #8 The late Dr Deafe in altering the fhape of the vec- tis, wifhed to imprefs upon the profeffion the neceffity for changing the mode of employing it; and according¬ ly he called his inflrument an extraffior. This power, however, feems to be poffeffed in a fuperior degree by Dr Lowder’s inftrument, of which a defcription is con- tained in the eighth volume, fecond decade, of Dr Dun- cap’s Medical Commentaries, p. 400. As this inftru¬ ment may be ufed with perfedi fafety, both to mother and child, and as in fome cafes it is fuperior to the forceps, we have reprefented its form in one of the plates, and now add the defcription and an account of the manner of applying it from the work already referred to. The inftrument “ confifts of a blade and handle (between which there is a hinge, that renders it por¬ table), meafuring in length 11-J inches. Its length, before it be curved is 1inches. The curve be¬ gins about half an inch from the hinge. It defcribes, reckoning an inch from its firft curvature, as nearly as can be eftimated, an arc of 87 degrees of a circle, the radius of which is four inches. The breadth of the blade, at the beginning of the curve, is half an inch, and is gradually increafed, till within three quarters of an inch of thq extremity, where it meafures an inch and three-fourths. Its extremity is femicir- cular. Within inches of the extremity there is an oval opening, meafuring 2^ inches in length, and at its greateft breadth. By this opening, the depth of the curve is confiderably increafed, without rendering the inftrument inconvenient in its introduction.” 70 Let us fuppofe that it is found neceffary to ufe Lowder’s lever, when the head of the child has juft begun to enter the cavity of the pelvis. The patient is to be placed in the ordinary pofition, on the left fide, in bed. The oc¬ ciput of the child is to be carefully diftinguiftied, and the curve of tbe inftrument is to be applied, with all the neceflary precautions, over it. The extremity of the blade ftiould be within a very little of the nape of the neck. To accomplilh this part of the operation Chap. IV. with facility, it is neceflary that the operator be well Preterna- acquaintfcd with the (hape of the pclvr, and that he tura‘Part'u" have accuftomed himfelf to apply the inftrument over a j round fubftance. When the inftrument is applied in this manner, the operator will find, that he can exert very coniiderable power in drawing down, without prefliug on any o her part than the occiput of the child. The mother can¬ not poftibly feel the inftrument 5 while, at the iame time, the many points of the foetal cranium, on which it refts, prevent any injury whatever to the infant If there be any pains, however flight they ma y be, the operator flrould draw’ down only during the pain : in the intervals, a foft w'arm cloth fhould be wrapped round the handle. If there be no pains, he mull draw down from time to time, imitating, as nearly as he can, the natural efforts. It is aftonhhing, of what ufe eren the moft trifling pains are, on iuch occafions. With¬ out pains, a long time is required before the head be made to advance in a perceptible degree (though, after it ,has advanced a little, it foon yields entirely) j while, with them, the progrefs is often rapid. The operator (hould continue to draw down in the fame manner, till the head be completely in the ca- tity of the pelvis. Should any circutnftance, as danger¬ ous uterine hsemorrhagy, or convulfions, require that the delivery be expe.ditioufly finifhed, after the head is brought into this pofition, the forceps muft be applied ; for it is in the power of the operator, by means of them, to accomplilh the extraftion of the head within a very ihort fpace of time, or at leaft, within a much fhorter fpace than would be required, were the ufe of Low’der’s lever continued. But if there be no dangerous fymptom, the opera¬ tion may be completed by the firft inftrument, without any afliftance from the forceps. For this purpofe, the operator fhould continue to draw down, by prefling on the occiput, as already directed, until the face ftrall have turned into the hol¬ low of the facrum. The direction of the. inftrument muft then be changed. The reafon of this is very ob¬ vious. After the face is in the hollow of the facrum, the occiput becomes engaged in the arch of the pubis, and rifes under it, while, at the fame time, the chin leaves the top of the breaft, on which it had refted during the preceding procefs of labour, and defcribes a courfe equal to a full quarter of a circle, which is the confequence of the occiput defcribing a fimilar courfe under the arch of the pubis. Were the practi¬ tioner, then to continue to prefs in the fame direction as he did while the head was palling through the brim, he would counteract this natural procefs, and hence would retard delivery, and injure the parts againft which he would neceffarily prefs the child. The inftrument muft, therefore, be withdrawn from the occiput, and applied with the proper precautions over the chin, when the operator is to imitate the procefs of nature, by difengaging the chin from the breaft, and making the occiput rife under the arch of the pu¬ bis, while, with his left hand, he proteffs the peririEeum from injury. From thefe obfervations it is obvious, that the inftru¬ ment introduced into praCtice by Dr Lowder, affords exaCtly the aftiftance, in the firft order of laborious la¬ bour, which is required j for it fapplies the place of the propelling / Chap. IV. Preterna- propelling powers, or increafes their efficacy, by a&ing tura.l Par* on the body of the child, without iniuring any part of . the mother. ^ t “ This property renders it of great ufe in certain cafes of deformed pelvis, viz. where the ffiort diameter of the brim is about three inches. In fuch cafes, the long continued ftrong aftion of the uterus, often eventually"* forces the head into the pelvis j but the ftrength of the patient is in confequence fo much reduced, that after it has proceeded fo far, the pains are entirely fufpended, pnd the delivery muft neceflarily be finilhed by the ufe of mechanical expedients; but the child’s life is commonly previoully deftroyed, by the compreffion of the brain. If, in fuch cafes, it be poffible to increafe with fafe- ty the vis a tergo, the child would then be forced through the brim of the pelvis before the woman’s ftrength were exhaufted, and before its life were en¬ dangered $ confequently, many children, commonly doomed to inevitable deftruftion, would lie preferved. “ Lowder’s lever, I apprehend, poffeffes this power. It may be calculated, that, by its ufe, the efficacy of the labour throes is at leaft doubled. Hence the child, in cafes of flight deformity of the pelvis, is forced through the oppoling part within one half of the time which would be otherwife required j and this is ac- compliffied without injury either to the mother or in¬ fant y for the inftrument preffes on no part of the form¬ er ; and it refts on fuch parts of the latter, that no harm can poffibly be done. “ In face-cafes, too, where the interference of the prac¬ titioner is neceffary (which, indeed, is a rare occur¬ rence), this inftrument may be employed with much advantage. The' great aim ffiould be, to draw down the occiput. “ As it appears, therefore, that Lowder’s lever is ap¬ plicable in many cafes where the forceps are inadmiffi- ble, and that its ufe is not produ&ive of fo much ha¬ zard to the mother as that of the forceps, it might per¬ haps be inferred, that the latter inftrument may be banifhed from practice, as unneceffary and dangerous. Accordingly, many pra&itioners of midwifery have adopted an opinion of this kind j and, indeed, there are very few who do not employ one or other of thefe in- ftruments exclufively. “ But however defirable it may be to leflen the num¬ ber of mechanical expedients, and to Amplify practice, I apprehend, that many lives would be loft if we poffeffed or employed no fuch inftrument as the forceps. As they have the property of a lever, delivery can in many cafes be accompliffied much more expeditioufly by them than by Dr Lowder’s inftrument. This feems to be the foie advantage which they poffefs over it ; and that is counterbalanced by feveral great difadvantages. Many authors, indeed, have alleged, that the forceps have excluftvely the power of diminilhing the ftze of the foetal cranium, by the preffure of their blades, and hence have attributed a degree of preeminence to them, , which in fa£t is not their due ; for as the flze of the child’s head is, in natural cafes, diminiffied as far as is neceflarv, by the contractions of the uterus forcing it forward through the bones of the pelvis, an increafe of the vis a tergo will of courfe increafe that diminution, if the ffiape of the paflage require it. While Lowder’s lever, therefore, poffeffes the power of compreffing the VOL. XIV. Part I. MIDWIFERY. 57 cranium in common with the forceps* it has a decided Pieterna- fuperiority over them in this, that it accomplilhes that tural .Par* end by Imular means with na^’-e. i ^ “ The great difadvantages ol the forceps are, that they are inapplicable when the child’s head is fltuated high in the pelvis j that their application is often difficult to the operator, and painful to the patient $ and that, as their centre of aClion is on the parts of the patient, they muft injure h£r in proportion to the reflftance oppofed to the delivery. “ On the whole, then, in cafes of the firft order of la¬ borious labours, both inftruments muft be occaftonaliy had recourfe to. When the head is not completely withiii the cavity of the pelvis, Lovrder’s lever muft be employed j and even when it is in that pofltion, the fame means may be ufed, if there be pains. But, when the labour throes are entirely fufpended, or wffien any circumftance renders it neceflary to terminate the de¬ livery with expedition, the forceps ought to be em¬ ployed in preference to every other inftrument, if the head of the child be within their reach.” The forceps are fuppofed to have been invented by 7 a Dr Hugh Chamberlain, who was phyftcian to King Charles II. j but their form has been greatly altered flnce his time. The moft approved form is that repre- fented in the plate. This inftrument is only applicable in prefentations of the head; but it was formerly, by Dr Smellie and others, recommended in face cafes. In order that this inftrument be applicable, it is ne¬ ceflary that the head be completely, or nearly fo, in the cavity of the pelvis $ but fometimies a lengthened pair is ufed for cafes where the head is fltuated high. The employment of long forceps, however, being ex¬ tremely dangerous, is feldom juftitiable ; and there¬ fore we ffiall limit our directions to the ule of the com¬ mon ffiort forceps. There are three principal cafes in which that inftrument may be had recourfe to, viz. 1. where the face is in the hollow of the facrum ; 2. where the face is wedged un¬ der the pubis j and 3. where it is on one tide of the pelvis. ' In whatever fituation the head is, the inftrument is to be applied over the ears, othmwife there could be no fafe and fecure hold. In the procefs of extracting the child with this inftrument too, it is to be obferved, that the convex edge of the blades is to be brought along the hollow of the facrum. The inftrument being applied fo cautioufly over the ears of the infant that no part of the woman be injured by their introduction, the locking parts are to be brought together, and fecured by a ligature 5 after which the operator, fupporting carefully the perinaeura with one hand, is to draw gently in a direction of from blade to blade during a pain, or now and then to imi¬ tate labour throes, while he at the fame time favours the mechanifm of labour by accommodating the child’s head to the paflage fo as to make it take up the leaft poffible room. If this be done with fuitable caution and gentlenefs, no part of the woman ffiould be injur¬ ed, and the parts of the infant on which the inftrument had refted fhould not even be marked. But as there can be no. doubt, that in the procefs of ufing the for¬ ceps, the parts of the w'oman are prefled upon by the blades, if much force be exerted, or if due attention be H - • not 73 53 M I D W 'Preterna- not paid to the adaptation of the head of the infant to tura'h,Par* the apertures through which it is to be brought, the ■■ mo(t dreadful effedhs refu^ hom the operation. Sect II. Of the Deviation.'! from Natural Labour, which proceed from the fate of the Secundines. 74 The membranes which envelope the foetus are in fome cafes more tender, and in others more rigid, than in general they are found ; circumflances which have a conflderable elFect on the procefs of parturition. Be- fides this, the placenta is on fome occalipns attached to the cervix or os uteri, by which not only is the order of labour interrupted, the placenta being expelled be¬ fore the child, but alfo is the patient’s life expofed to much danger. _ -75 a. Where the membranes are too tender, the liquor amnii is difcharged at the beginning of labour before the os tincae be dilated, and then all the bad confe- quences detailed under the article b, Se£t. I. neceffarily enfue. b. Where the membranes are too rigid, the labour may be protrafled to fuch a period as (hall injure the mother moll materially, and at laft, as the whole ovum may be expelled entire, the life of the child may be endangered. After the os uteri is completely dilated, if the child included in the membranes do not advance into the cavity of the pelvis, the membranes fhould be rup¬ tured. But if it do, they ought not to be broken till they prefs on the external parts. c. But the molt alarming deviation from nature, which can proceed from the ftate of the fecundines, is that which originates from the attachment of the pla¬ centa over the cervix or os uteri. As there can be no doubt that the uterine veflels dip into the fubflance of the placenta, and that they are lacerated when the pla¬ centa is feparated from its attachment, it is obvious that in fuch a lituation ha;morrhagy to a moft danger¬ ous extent mull unavoidably enfue during the procefs of the labour. 7^ Mr Rigby of Norwich was the firft Britilh practi¬ tioner who publicly explained this caufe of haemor- rhagy. In the firft edition of his work ; viz. that pu- blifhed in 1775, he expreffes himfelf in the following words. “ But from the uncertainty with which (as before obferved) nature fixes the placenta to the ute¬ rus, it may happen to be fo fituated, that when the full term of pregnancy is arrived, and labour begins, a flooding neceffarily accompanies it, and without the in¬ tervention of a' y of the above accidental circumftancesj that is, when it is fixed to that part of the womb which always dilates as labour advances, namely, the collum and os uteri, in which cafe it is very certain that the placenta cannot, as before deferibed, remain fecure till the expulfion of the child, but muft of neceflity be fe¬ parated from it, in proportion as the uterus opens, and by that means an haemorrhage muft unavoidably be ^ produced. “ That floodings, which arife from thefe two different 1 F £ II Y. " Chap. IV. eaufes, which I will diftinguifh by the names of acci- Tietema- dental and unavoidable, though they may appear exact- tural Par¬ ly fimilar in their firft fymptoms, fhould terminate very L'"'u"l'“ , differently, if left to nature, aftifted only by the palli¬ ative means before mentioned, cannot feem ftrange \ nor can it be a doubt, that of thele two kinds of floodings, only one of them, namely, that which is produced by an accidental feparation of the placenta, can be relieved by the ufe of thefe palliatives •, and that the other, in which the placenta is fixed to the os uteri, and the flooding is therefore unavoidable, cannot poflibly be fuppreffed by any other method whatever than the time¬ ly removal of the contents of the womb j for fuppoiing the difeharge to be for a while reftrained by bleeding, medicine, cool air, &c. it will inevitably return, when nature is fo far recovered as again to bring on labour : in the firft cafe, if the haemorrhage have been checked by the ufe of the above means, it is not impoftible but labour may come on, and the child be fafely expelled by the natural pains before it returns ; or if it fhould return, it may not increafe in quantity ; as in this cafe very probably the feparated part of the placenta which occafions the difeharge remains nearly the fame ; where¬ as in the other cafe, in which the dilatation of the os uteri produces the feparation of the placenta, every re¬ turn of pain muff be a return of the bleeding, and it murt become greater and greater as the uterus opens more and more, and the placenta is in proportion de¬ tached, till it increafes to a degree that exhaufts the pa¬ tient, and ftie dies before nature has been able to expel the child. That fuch muft inevitably be the progrefs and event of floodings arifing from fuch a caufe, if left to nature, is too obvious further to be infifted on. “ That this attachment of the placenta to the os uteri is much oftener a caufe of floodings than authors and pra&itioners are awrare of, I am from experience fully fatisfied, and fo far am I convinced of its frequent occurrence, that I am ready to believe that moft, if not all of thofe cafes which require turning the child are produced by this unfortunate original fituation of it ( l).” No cafe in pra&ice requires more decifion and more attention than this. It muft be obvious that no inter¬ nal remedy can be of any avail in flooding from fuch a caufe, and that the life of the patient can be faved by immediate delivery alone, whenever confiderable hse- morrhagy takes place. But it is to be recolleffed that the difeharge in many inftances threatens for days or even weeks before it becomes ferious, and that for the fake of the child, the patient fliould be allowed to ad¬ vance as near as her own fafety will permit to the full period. Thefe threatenings may often be removed by aftringent injedlions, per vaginam, while at the fame time every means of moderating the circulation of the blood fliould be fuggefted. But whenever the difeharge becomes profufe, de¬ livery by art is to be had recourfe to. The rule of Mr Rigby, and of fome other eminent pradlitioncrs, “ to watch from time to time the dilatability of the os uteri,” and take advantage of that ftate, founds well j but (l) Effay on the Uterine Haemorrhagy which precedes the delivery of the full-grown Foetus, illuftrated by Cafes by Ed. Rigby, London 1775, p. 14. Vide alfo 3d edition 1784, fame page. Chap. IV. Prtterna- but if fcHowed in prafiice, mud: either give fuch a .tural Par- {bock to the woman’s conftitution, as (hall end in , tUl^10-'1- dr0pfy or marafmus, or mud prove immediately fatal. In all thofe cafes the os uteri may be forced, and al¬ though it be not more open than barely to admit the introdutdion of the finger, it may in a very few minutes, if the operator have fteadinefs and perfeverance, be ren¬ dered capable of allowing the hand to pafs. If poffible, the hand fhould be carried forward at one fide of the placenta, for if that part be torn (which it mud be ad.Yiitted is fometimes inevitable) the infant muft be deflroyed. After the feet are brought down, the child is to be extradied as expeditioufly as regard to its fafety will permit, and the hand is then to be again paiTed into the uterus for the purpofe not merely of de¬ taching completely the fecundines, but chiefly of fe- curing the contraction of that organ which is the great bbjedt of the delivery. 2$ Sect. III. Of the Deviations from Natural Labour, which proceed from the fate of the Child, The regular procefs of parturition may be inter¬ rupted, in confequence of the pofition and of the fliape of the child. i. Pqfition of the child. The mod natural po¬ fition of the child, at the beginning of labour, is with the head placed at the brim of the pelvis, *he face towards the facro-iliac fynchondrofis of one fide, and the occiput towards the groin of the oppofite fide. But there are many deviations from this natural pofition. Sj a. Although the head be applied to the brim of the pelvis, it may be forced with the finciput towards the promontory of the facrum, and the occiput towards the -fymphyfis pubis. In this fituation the largeft diameter of the head is oppofed to the fmalleft of the pelvis, con- fequently the head remains firmly fixed in that pofition, for as the finciput cannot advance a point beyond the promontory of the facrum, the occiput is forced jufl fo much below the brim at the pubis as to wedge the head firmly between the facrum and pubis. By the long-continued prefifure the foft parts become much Iwelled, and at laft the head is found fo immoveably fixed, that it can neither be made to recede, nor can it advance in the fame dire&ion. This conftitutes what has been flyled the caput incuneatum, or, as it is called by French praftitioners, la tete enclavee. This cafe mcft commonly is the effe£l of mifmanagement ; for if a very little preffure be made on the head when it pre- fents at the brim of the pelvis in this unfavourable pofi¬ tion, the pains will readily force it into the paffage in the proper direction. When the locked head has aflually taken place, the prabHce mufl: be varied according to the circumftances cf the individual cafe •, hence ’ the long forceps, and fometimes even the crotchet, are required. Turning is quite inadmiffible, and the three-bladed forceps fo ftrenucufly recommended by Dr Leake, in this cafe are totally inapplicable. jj b. The long diameter of the head may alfobe applied to the fhort diameter at the brim, in a different manner, viz. with the face towards the pubis, and the occiput to the bsfe of the facrum. 1 he cbftacles to the pro¬ gress of the head are not in this cafe fo great as in the 59 former (tr) ; for as the occiput is round, and its fur- Preterna- face inconfiderable, while at the fame time the promon- t“‘* tory of the facrum is round, the labour throes, after - -|‘ » fome time, force the occiput either a little to one fide, or at leaft paft the promontory. The cafe, however, is tedious, painful, and even dangerous to the patient; for as the face prefents a larger i’urface to the pubis than the occiput, it muff require longer time to pafs, and as there are many inequalities on the face, the patient muff fuffer much pain from their preffure, and from the fame circumflance muft incur the hazard of having the urinary bladder or the urethra irreparably injured. In this cafe Profeffbr Saxtorph remarks, “ vel occi- Si put primo deicendit, quod cum accidit, frons ab offibus pubis fuftentata elevatur, mentumque pedtori infantis imprimitur, urgentibus porro doloribus, verfus anum et perinmum, adagitur acuminatum occiput, et nullo modo fub arcu oflium pubis extorqueri poteft inflexile finciput, bine partus in exitu pelvis impoffibilis redditur.” That this is a miftake, the obfervation of other prac¬ titioners has fufficiently demonftrated; for it is well known that in fuch cafes, after the perinaeum has been much ftretched the occiput is forced through the parts, and immediately flips back towards the anus, while the nape of the neck being applied to the anterior edge of the perinaeum, moves on it as on an axis, fo that the finciput and face emerge from under the fymphyfis pubis, the chin leaving the top of the thorax in the fame manner as if the face were lituated naturally in the hollow of the facrum. Although in this cafe the natural efforts moft ordi¬ narily complete the procefs, yet in many inftances the injury which threatens the urinary bladder renders the application of the forceps expedient. c. Although the head may have entered the pelvis in g. the moft natural pofition, yet it may not make thofe changes in fituation which are required to accommodate it to the outlet j for the face may turn under the fym¬ phyfis pubis inftead of into the hollow of the facrum. When this happens the phenomena already defcribed(^) take place. d. It lometimes happens, that inftead of the fmooth Su. part of the cranium being forced firft into the pelvis, the face prefents. In this cafe it may be fituated in three pofitions, viz. with the chin to the facrum, or pubis, or fide. aa. The firft cafe is efteemed the moft dangerous both for the mother and child. For the mother, becaufe the child in this pofition requires more room than the pelvis affords, confequently the foft parts in contadl 'with the chin and fmooth part of the crani¬ um are much compreffed, and hence if the delivery be not fpeedily accomplithed, much injury to thofe parts will enfue. As the chin too muff pafs along a curved line formed by the facrum and coccyx, the obftacles to delivery are very great; and even after the face has been forced fo low as to prefs on the perinaeum, that part is in much hazard of being torn by the violent dif- tenfion which it undergoes. The delivery in fuch cafes is very rarely accomplifhed naturally. This fpecies of labour is equally dangerous to the child as to the mother, not only on account of the long- continued preffure on the brain, but alfo from the occi¬ put being forced fo ftrongly on the fuperior dorfal ver¬ tebra that the free return of the blood from the bead is K 2 interrupted, MIDWIFER Y. 6o M I D W Pretema- interrupted, and hence apoplexy enfues; a circumftance rural Par- is proved even by the appearance of children . tun*lon' ^v}10 jn fnLir cafes are born alive, for the face of fuch children is perfeftly livid. Jacobs has pointed out thefe dangers pretty accurately. “ II eft dangereux pour 1’enfant, (he fays), parce que la tete etant pen- chee et portant fur fon cou, elle cotnprime les vaiffeaux fanguins au point que.le fang ne pouvant plus circuler, il meure d’une apoplexie pour peu que I’on tarde a I’ex- traire.” Ecole pratique des Accouchemens, par le Pro- fejjeur J. B. Jacobs. A Paris, 1785. p. 366. bb. The fecopd cafe, viz. where the chin is placed towards the pubis and the finciput to the facrum, is neither fo dangerous for the mother nor child. For if by the force of the pains the face be pufhed fo far for¬ ward that the chin becomes engaged within the arch of the pubis, then the inferior edge of the fymphyfis pubis foriris a fulcrum on which the inferior jaw moves, by which the finciput and occiput pafs readily and eafily along the hollow of the facrurrv, their furface being well adapted to that of the facrum, and the feveral parts of the face pafs in fucceflion through the vulva. cc. The third cafe, viz. where the chin is to one fide, , is ftill more favourable than the fecond j for the face pafies readily through the oblique diameter When any extraordinary difficulty occursin face-cafes, Lowder’s lever is the inftrument to which recourfe ought to be had. The forceps, as recommended by Smellie and others, being quite infufficient to afford a fafe and fecure hold of the infant. e. On fome rare occafions the fide of the head pre- fents, fo that one ear is in the centre of the pelvis. In fuch a cafe, the ftrongeft contra&ions of the uterus cannot make the head enter the pelvis, and the w7omar> would generally die undelivered were it not for the in¬ terference of art. Cafes of this kind are remarkably rare The hand of the operator muft be carried up in fuch cafes, and moderate preflure muft be made in fuch a direction as (hall allow the contradlions of the uterus to pufti the fmooth part of the cranium into the cavity of the pelvis. *6 J". The head of the child is not the part always^ ap¬ plied to the pelvis j for fometimes the head paffes laft. Whenever any other part than the head prefents, the labour is ftyled by authors preternatural. All preternatural labours have been divided into two orders. A. Prefentations of the inferior extremities 5 and B. Prefentations of the fuperiqr extremities. A. Prefentations of the lower extremities comprehend cafes where one or both feet, one or both knees, and the breech prefent. g. Cafes where both feet prefent are more frequent than thofe where one only prefents. It has been cal- ' I - F E K Y. Chap. IV. culated that the feet prefent once in 105 cafes of Preterna- labour. tural Par- Some authors have divided labours of this kind into tantion. , a great variety of fpecies. There is,' however, no ne- ceffity for fuch divifions, and they tend to miflead and embarrafs praciitioners. All the varieties may be re¬ duced under three heads ; for the toes muft be either towards the fide of the pelvis, or towards the facrum or pubes. dd. Where the toes are towards the fide of the pel¬ vis, the child is generally placed in fuch a manner that the abdomen, breaft, and face pafs in fucceffion along the facro-iliac fyhchondrofis of that fide. This is the moft favourable fituation in which the child under fuch circumftances can be placed $ for the largeft parts of its body pafs through the largeft aperture of the pelvis. In this cafe, then, the a&ion of the uterus forcing forward the child, the feet are by degrees excluded through the external parts, the toes being fituated be¬ tween the point of the coccyx and the tuberofity of the ifchium; the thighs follow, then the abdomen and thorax ; but the farther progrefs of the child is for fome time interrupted by the arms paffing up along each fide of the head, which add confiderably to its bulk ; at laft, however, the repeated contra&ions of the uterus force the face into the hollow of the facrum, and then the nape of the neck turning on the inferior edge of the fymphyfis pubis as on a pivot, the face is excluded, fol¬ lowed by the finciput and occiput. Where the efforts of nature in this procefs are fole- ly trufted, the child, unlefs it be fmall and the pelvis be very capacious, wffiile the foft parts are much relaxed, is generally ftill-born j for before the obftacles to the delivery of the head be overcome, the long-continued compreffion of the funis umbilicalis, by intercepting the courfe of the blood, proves fatal. ee. Authors have generally confidered that to be the moft favourable pofition in which the feet can prefent, where - the toes are towards the facrum. Roederer for example fays, “ pedum tunc digiti fi ofli facro obver- tantur, foetus abdomini incumbens refle fitus eft (l).” But two difadvantages attend this pofition : Firft, the largeft part of the child’s body is forced through the fmalleft part of the outlet of the pelvis •, and 2dly, The longeft diameter of the head is applied to the fhorteft diameter of the brim of the pelvis. In fuch cafes, there¬ fore, the patient commonly fuffers much pain, and the child’s life is deftroyed. £ ff. When the toes are turned to the pubes, it has been univerfally acknowledged, that the feet are in the worft poffible pofition. Indeed not only do the difad¬ vantages ftated as refulting from the laft pofition (eej equally take place in this one, but another caufe of difficulty and danger is added, viz. that the face being applied to the pubes, the progrefs of the child muft be impeded in no inconfiderable degree. Hence in fuch a cafe the patient may be very much injured, and th« child muft be almoft inevitably loft. The management of footling cafes was firft explained, in as far as we know, in X)r Hamilton’s Selcdl Cafes in Midwifery, p. 89. “ It (l) Roederer Elementa Artis Obftetricse, p. 249. Chap. IV. MID W Pretema- “ Jt is a curious circumftance that the beft mode of -^urition"' ^e^very *n footling cafes has not yet been explicitly ■ — v‘- pointed out by any author. This muft appear furpri- 88 fing when it is confidered that fuch prefentations fre¬ quently occur j that the life of the child depends upon the pra£Hce adopted j and that the management of every preternatural labour muft be influenced by the rules ap¬ plicable to footling cafes. “ When the feet prefent, the infant’s fituation rela¬ tively to the mother muft be with its belly placed to¬ wards her back, her belly, her fide, or fome interme¬ diate point. The firft of thofe pofitions Jias been generally confidered asr the moft favourable, and the laft as the reverfe. But a little reflexion muft convince every praftitioner that the infant occupies the leaft poflible ** * fpace, when its belly is towards the fide of the mother, or, to fpeak more accurately, towards the facro-iliac lynchondrofis ; for then the largeft part of its body is within the largeft diameter of the pelvis at the brim, while in its progrefs through the pelvis, 'the breech is not forced through the Ihorteft diameter at the outlet, viz. that between the tuberofities of the ifchia. “ In every cafe therefore where the feet are brought down, the toes fhould in the procefs of extraftion be turned into fuch a pofition, that the belly, the breaft, and the face, ftiall be made to pafs in fucceflion along the neareft facro-iliac fynchondrofis. After the arms are difengaged, the face can be readily turned into the hollow of the facrum.” One foot may prefent in the fame variety of direc¬ tions as both feet. Where one foot prefents naturally, if the pains be regular and ftrong, the cafe is attended with lefs pain to the mother and lefs danger to the child, than where under the fimilar circumftances both feet prefent. It it lefs painful to the mother, becaufe the child is formed into the (hape of a cone, and the apex pafles firft through the pelvis, by which the parts are gradually prepared, and not fuddenly forced open j and, it is lefs dangerous for the child, becaufe the one leg being folded along the belly and breaft, the umbilical cord is prote&ed from compreflion. From thefe circumftances, a very erroneous inference has been deduced by fome celebrated authors, viz. that in cafes where it is neceflary to perform the operation ftyled turning, the one foot Ihould be brought down in preference to both. But as on fuch occafions the ope¬ rator cannot be aflifted by pains, it is obvious that he • could not have a fufficient hold of the child by a fingle foot. \Vith the exceptions juft ftated, the phenomena w'here one foot prefents are the fame with thofe which occur in cafes where both feet are in the pafiage. 90 i. When the knees prefent, all the inconveniences of footling cafes take place, with this additional danger to the child, that if the legs be croffed, one or both may be fraciured before the knees be expelled. The management of knee prefentations muft depend on the advance wdiich thefe parts have made at the time afliftance is procured. If they be ftill at the brim of the pelvis, the feet fhould be hooked down. But if they be fairly within the cavity of the pelvis, or in the vagina, they muft be allowed to protrude without the parts until the feet be expelled. 91 k. Breech cafes occur more frequently than footling I F E It Y. 61 ones. It has been calculated that they happen once in Pr^tema- 52 cafes of labour. tural Par- The breeck may prefent in the fame variety of po-, turitlon- , fitions as the feet, viz* with the belly of the child to the back, to the belly, or to the fide of the mother. Certain advantages and difadvantages attend each of thofe pofitions. When the belly is to the back of the mother, the thigh bones being ftraight, pafs with difficulty along the curved line of the facrum j after that obftacle is fur- mounted, the largeft part of the child is applied to the fmalleft diameter at the brim of . the pelvis j and after the body is delivered, the head is fituated in fuch a direc¬ tion that it cannot enter the brim j for the finciput is op- pofite to the promontory of facrum and the occiput to the fymphyfis pubis. If the belly of the child be to the belly of the mother, then the thigh bones pals very readily along the bones of the pubes, while .the fpine bending, accom¬ modates itfelf admirably to the hollow of the facrum, confequently at firft the labour proceeds fpeedily and fafely ; but after the breech has palled through the ca¬ vity of the pelvis, it is applied with its largeft diameter to the (horteft diameter at the outlet, and after it has at laft overcome the refiftance occafioned by that circum¬ ftance, and the body is expelled, the face, being towards the fymphyfis pubis, fubjefrs the patient to all the pain, and the child to all the dangers, already enumerated (j^). When the belly of the child is placed towards the fide of the mother in breech cafes, then the fame advan¬ tages attend the fituation which have been enumerated under the firft footling cafe (dd) j for the largeft part of the child is uniformly applied to the largeft aper¬ ture of the pelvis. Befides this, the child incurs lefs hazard in this pofition than where the feet originally pre¬ fent ; for the legs being folded on the belly protedl the .the funis umbilicalis from compreffion. Breech cafes, where the pains are powerful, are to be left entirely to nature, taking care to fupport the pe- rinaeum, till the infant be expelled 5 the ftavel-ftring is then to be taken off the ftretch, and the child accom¬ modated to the paffage on the fame principle as footling cafes. When the pains prove inadequate to the expulfion of the breech, various methods have been recommended, fuch as hooking the finger in the groin, firft on the one fide, and then on the other; employing a blunt hook for the fame purpofe •, fixing a garter or piece of tape over one or both thighs, and applying the forceps. _ The firft of thefe methods is ufeful where there are flight pains, and the infant is not large. The fecond and third methods are injurious both to the mother and child, for they add to the vis a tergo, without dimi- nifliing the refiftance. But the fourth method, that is, applying the forceps, is invariably both fafe and fuccefs- ful ; becaufe, while it enables the praflitioner to draw forward the child,without any uterine action, it at the fame time puts it in his power to accommodate it to the paffage by turning it round in the proper direction. B. The fecond divifion of preternatural labours, in¬ cludes all cafes wffiere any other part than the head 9% or lower extremities prefents; fuch as the neck, the arm or ftioulder, the breaft, the back, the belly or the fide. It 93 94 M I D W I It is obvious, that a full-grown child cannot poflibly be expelled through the natural paffages in fuch pofi- tions, and confequently, unlefs nature perform the ope¬ ration firft defcribed by Dr Denman, both mother and child mufl be dellroyed j for the unavailing contrac¬ tions of tne uterus wiil firfl operate in impeding the circulation of the child; and then by puftiing forward its body with great force on the foft parts of the mo¬ ther, will induce fuch a degree of pain and indamma- tion, that (he mufl: at lafl: fink exhaufted. The praflice of turning, as it is called, that is, of bringing down the feet in cafes belonging to this divifion o! preternatural labours, originally fuggellcd by Pierre Franco, but firli properly ellablilhed by Ambrofe Parre, has been the means of having many valuable lives. Indeed the fuperiority of this pra&ice to that of making the head prefent under fuch circumilances mufl be very obvious; for after the operator has got hold of the infant’s feet, he can complete the delivery without requiring the affiftance of pains. The dangers to be dreaded in performing the opera¬ tion of turning are rupture of the uterus, or fubfe- quent inflammation of the paffages, and lofs of the child. The firli of thefe, is to be guarded again!!, by pur- fuing fuch means as (hall fufpend the labour-pains, and remove the uterine flriclure, when the opportunity of turning before the difcharge of the water which fur- rounds the infant has been loft. Thefe are blood-letting and opiates‘in large dofes, fingly or combined, accord¬ ing to circumftances. Great gentlenefs and caution, on the part of the ope¬ rator, are indifpenfibly requifite to prevent both rupture of the uterus and the fubfequent inflammation of the paiTages. When it is added, that a perfeverance for feveral hours is fometimes neceffary for accompliftiing this operation, it mull be obvious, that it demands in many inftances a greater degree of patience, as well as dexterity, on the part of the operator, than moll cafes of furgery. The fafety of the infant, can only be fecured, by at¬ tending very accurately to the rules for the manage¬ ment of footling cafes. Dr Denman, whole difcovery of the fpontaneous evo¬ lution has been already mentioned, at one time fuppof- ed that in the cafes under confideration, the operation of turning might be difpenied with, and that the pa¬ tient might be faved much hazard, and the practitioner great anxiety and trouble, by waiting for that change. But although in the later editions of his valuable work (Introduction to Midwifery), he has relinquilhed this idea, his obfervations on the management of pre¬ ternatural labour of the fecond order, are evidently in¬ fluenced by his former opinion. He fays (vol. ii. p. 249.), “ Yet the knowledge of this faCl, however unqueftionably proved, does not free us from the neceflity and propriety of turning children prefcnting with the fuperior extremities, in every cafe in which that operation can be performed with fafety to the mother or give us a better chance of faving the child. Under fuch circumftances, the inftruCtions given by former writers, and the obfervations we have before made, muft ftill be confidered as proper to guide our conduCl. But when wre are called to a patient with a preternatural labour, in which there is no room to hope for the prefervation of the child, or in which we F E R Y. Chap. IV. are aflured of its death, or when the operation of turn- Preterna- ing cannot be performed without violence and fome tural Par- danger to the mother, then the knowledge of this pro- turitlon‘J, bability of a fpontaneous evolution, will fet our minds at eafe, and difengage us from the confideration of ma¬ king any hafty attempts to perform a hazardous ope¬ ration, from which no poffible good can be derived, except that of extraCling a dead child, and which at ail events might be effefted by a method much more fafe to the mother. “ The time required for the fpontaneous evolution of the child, and the facility with which it may be made, will depend upon a variety of circumftances, but chief¬ ly upon the fize of the child, the aptitude of its pofi- tion, the dimenfions of the pelvis, and the power ex¬ erted by the uterus. If the child be very large or much below the common fize, the flower I believe will be the evolution, nor can it be made at all without a ftrong adlion of the uterus. It is poftible, therefore, when we have conduced overfelves on the ground of expectation that the evolution would be made, that the pains may fall off or be unequal to the effect, and we may be difappomted. It might then be apprehended, that the difficulty of extracting the child would be in¬ finitely increafed. But though the evolution was not penecled, I have not found this confequence } for the child, though not expelled, has been brought into fuch a ftate that I could afterwards pafs my hand with eafe, and bring dowm its feet, though in an attempt to do this at the beginning of the labour I had bJen foiled. In one cafe in which the evolution did not take place, I could not bring dowm the inferior extremities, but I ' had no difficulty in fixing an inftrument upon the cur¬ ved part of the body of the child, or in bringing it awTay with entire fafety to the mother. It was*before prefumed that the child was dead, and the foie objeCt was to free the mother from her danger ; and with her fafety no appearances of the child, however difagree- able, are to be put in competition. In cafes of this kind another mode of praCtice has been recommend¬ ed, that of feparating the head from the body with a blunt hook or other convenient fafe inftrument 5 but as I have never praClifed the method, I give the deferip- tion of it in a note.” -1 here are twro points in the above obfervations, in which it appears that Dr Denman has erred. In the firft place, in fanCtioning delay in having recourfe to the operation of turning where the fuperior extremity prefents. In ‘many fuch cafes, if the pains be not fpeedily fufpended, or the pofition of the child altered, the uterus would burft; an accident which has re¬ peatedly fallen under the obfervation of the waiter of this article. The fecond error is, the fuppofition that, after it has been found by experience in any given cafe, that the fpontaneous evolution is not to happen, it is eafy to ex¬ tract the child either by the feet or by fome inftru¬ ment. But it will, be found in the, majority of fuch cafes, that the infant is impacted into fo clofe a body, while the parts are all in a ftate of fwelling and in¬ flammation, that immenfe difficulty and great danger at¬ tend the attempt. The following obfervations on this fubjeft cannot be too itrongly impreffed on the minds of, efpecially young, pra£iitioners. 95 “ Several Chap. IV. M I D W I F E It Y. Prcterna- “ Several years ago it was difcovered by Dr Den- tura. rar- m5n> ;n prefentations, fuch as that in the above . cafe, the pofition of the child is fometimes altered, and Jncifion was made on each fide of the t y , cervix to the vagina, ana then a large cauhtlower ex- crefcence was found growing to the whole anterior part of the os uteri. The placenta adhered with its whole furface ; fo that the blood which fhe had loll muft have been wholly difcharged from the tumour (m).” 103 In two cafes, where a great thickening and indura¬ tion of the neck and mouth of the w’omb, approaching to the nature of fchirrofity, had taken place previous to conception, the natural a6Hon of the uterus, though af¬ ter a very confiderable time indeed, affifted by copious blood-letting, eventually overcame the refiflance. One of the patients died ten months after, with all the fymptoms of real cancer uteri. The other was reftored to perfedf health after lying-in. 104 Dr Denman has recorded (vol. ii. p. 73.) two cafes, where the enlarged ovarium impeded the progrefs of the child. In the one cafe the head of the infant was opened, and the delivery completed by the crotchet ; but the patient died at the difiance of three weeks. In the other, a trocar u'as puffed into the tumour, and a living child was born. The patient recovered from her lying-in 5 but died hedfic at the end of fix months. In fuch cafes, the ovary may be pufhed back, if the cir- cumltance be difcovered early enough. r35 Cicatrix of the vagina, in confequence of former in¬ jury, may appear at firft to impede the progrefs of the infant ; but it will always be found to yield to the pains, if the flrength of the patient be fupported, and proper means be adopted to counteraft the effe&s of the long-continued labour throes. A cafe occurred fome time ago to Dr Hamilton, where a fubltance, of the hardnefs of grirtle, as thick as an ordinary fized finger, placed between the vagina and reftum, and apparently extending from the ramus of one ifehium to that of the other, prefented an unfurmountable obifacle to the paf- iage of the child. He was called in after an unfuccefs- rul attempt had been made to tear away the infant, and found the woman in a date of extreme danger. He was informed, that five years before that period, die had had a very fevere tedious labour, follow’ed by great inflammation and fuppuration of the external parts. Tiie indurated part was cut through without the patient making any complaint, and the child was very eafily extracted ; but die furyived the delivery only two days. The relations would not permit the b.dy to be opened. 106 A colledllon of fames within the re&um has been known to occafion fuch refidancc to the paffage of the child, that the woman has died undelivered. In ge¬ neral, however, it is in the pow’er of an active practi¬ tioner to empty the gut at the beginning of labour. But if, from negledt, the head of the child be jammed in the pelvis, and immoveably wedged in confequence of an'accumulation of fmces, it then becomes neceffary to open the head. 107 Perhaps the mod frequent affeftion of the foft parts which impedes the procefs of the infant is, fwelling of the parts lining the pelvis. This circumdance has been Vol. XIV. Part I. (vt) Were fiich a ca'e again to occur, there could be round the neck of the tumour. I F E R Y. ,s5 already hinted at. It can never happen where the Preterna- pradtitioner is ordinarily attentive j for the tendernefs tural Par- heat, and drynefs of the paffages, which precede the t^^tlon•-. adual fwelling, cannot be overlooked by one at all ~ aware of the podibility of Inch an event. When it has adually happened, nothing can fave the mother but opening the head of the infant. After this mod unpleafant operation is completed, the extraction of the child is feldom a matter of much difficulty. Malformation of the external parts in fome cafes does re? not prevent conception. Two cafes have fallen within the knowledge of the writer of this article, where the woman had conceived though the orifice of the vagina had not been capable of permitting the introduction of even the little finger. And it confids with his knowledge, that about thirty years ago a woman under dmilar circumdances, was brought into the Royal In¬ firmary of this place, and was delivered by the cajfarean operation. She died within two days. It is fufficiently obvious that the fafe praCtice under fuch circumdances is to enlarge the natural opening, by making an incifion in the direflion of the paerineum, taking care not to wound the fphinCIer ani. Extreme rigidity of the external parts is one of the I0$ mod frequent caufes of deviation which depends on the date of the foft parts. It takes place, in a greater or lefs degree, in the greated number of women who lie in for the fird time ; and generally in all women who are condderably advanced in life before they have children. It is feldom that the redftance oppofed by the exter¬ nal parts is fo very great as to prove an invincible ob- dacle to labour. But, on many occafions, the long-con¬ tinued preffu re of the child on thofe parts produces the mod difagreeable confequences, as inflammation of all theie parts and of the bladder. Inflammation in thofe parts is always dangerous, for there feems to be a re¬ markable tendency to gangrene. Cafes are on record where the whole parts have floughed off, and where the reCIum, vagina, and bladder, have formed one ca¬ nal. Perhaps death is mucli preferable to life under fuch circumdances. Copious blood-letting, and the liberal life of fome unCluous application, with time and patience, in gene¬ ral overcome the rigidity of the external parts. Pla¬ cing the patient over the beams of hot water was for¬ merly recommended in fuch cafes, but this practice is now exploded. B. Many deviations from natural labour occur from rri ' the date of the bones of the pelvis, For they may be fo much altered in diape as either to increafe or diminifh confiderably the aperture of that part. When the apertures of the pelvis are too large, the mother incurs much danger, and the child is not totally exempt from hazard. (?a. The danger incurred by the mother arifes from there being no refidance to the paffage of the child, fd that when the affion of the uterus begins, the child may be pufhed by the force of the pains through the paffage before the foft parts be dilated ; hence the ute¬ rus may be ruptured, or the foft parts lacerated. If ' I ’ 1 on no ooud. re:pe£t;ng the propriety of fixing a ligature M I D W I F E R Y. Chap. IV. 112 513 114 on the other hand, the external parts be foft and yielding, a confiderable portion of the uterus may be excluded without the parts. There is a very wonder¬ ful hiftory of a cafe of this kind alluded to by Saxtorph in the following words. “ Memorabilius adhuc ex- emplum eft illud a cel. Wolfg. Mullnero allatum, ubi totus uterus una cum fcetu extra genitalia dilapfus, foe* tufque vivus extra pelvim vei'fione extradfus fuit, matre poll redudlionem uteri fuperftite. Vide ejus Bahrneh- mung von einer famt deni Rinde aufgefalienen Debahr- mutter, Nurnberg 1771 (l.) bb. The hazard wdiich the child undergoes is that of being fuddenly expelled, included within the entire ovum, fo that it may be loft before proper aftiftance can be afforded. Another danger is, that the mem¬ branes having given way, it may be daftied w'ith vio¬ lence upon the floor on wdaich the patient wTalks. Whenever from the great width of the hips, there is reafon to fufpedf that the pelvis is too large, the prac¬ titioner fhould continue in conftant attendance from the very commencement of labour, and (hould carefully adopt the appropriate and obvious means to prevent the hazards juft enumerated. e. But deficiency of fpace in the apertures of the pel¬ vis occurs much more frequently than increafe. The apertures of the pelvis may be diminithed from natural fmall fize or malformation of the bones, from exoftolis, or from altered ftiape in confequence of mollities effium. Cafes v'here the facrum and ilia are of an uncommon fmall ftiape are not frequent. Narrownefs of the bafe of the facrum is fometimes met with ; and in a few cafes it has been found that the apex of the facrum has ap¬ proached too nearly to the anterior part of the pelvis, fo as to diminifti the apertures at the outlet. Txoftofes feldom prove an obftacle to delivery •, but one exception to this rule fell under the obfervation of the writer of this article feveral years ago. The exof- tofis extended along the whole extent of the fymphyfis pubis, and w'as fully as thick as an ordinary fized fin¬ ger. The woman had been delivered previous to his being called in, but the exhauftion which followed, (for fhe had been allowed to continue five - days and nights in conftant hard labour) qccafioned her finking a very ftiort time after delivery. In this inftance both mother and child were loft from the felf-fufficiency and ignorance of the midwife. The deficiency may exift in the brim, ths outlet, or the cavity fingly or combined. The brim is much more frequently affecled by mol¬ lities offium than the outlet ; and, as was long ago re¬ marked by Levret, it generally happens, that when the brim is narrow’ed from this caufe, the outlet is wid¬ ened. The brim maybe diminiftred in fize by the projeftion of the promontory of the facrum, or by the flattening of the pubes, or by the approximation of the bones where the pubes and ilia unite, or by a combination of fome of thefe circumftances. The projeflion of the promontory of* the facrum, however, is by far the moft common. When this happens, the projeflion fome¬ times renders one fide of the pelvis wider than the other, and this conftitutes what authors call the diftort- ed pelvis. Sometimes, however, it leaves both fides of an equal wddth, and this is called the deformed pelvis. The deficiency in the brim produced by thefe caufes is very various; moft frequently (light, but fometimes fo great that there is not an inch between pubes and facrum. The outlet may be diminiftied by the approximation of the tuberofities and rami of the ifehia, or by the apex of the facrum and coccyx projecting more than ufually forward, while they are at the fame time hook¬ ed up. When both the brim and outlet are diminithed in aperture, the cavity of the pelvis is generally affefted alfo ; but when the deficiency of (pace is confined to either, the cavity is commonly more (hallow than na¬ tural, by which both the refiftance and the danger are confiderably leffened. Melancholy are the cafes wdiere the cavity is rendered deeper than ufual. As the praftice in cafes of extreme deficiency in the apertures of the pelvis is to be regulated by the degree of narrownefs, it is a matter of the firft importance to be able to afeertain the dimenfions in any given cafe with tolerable preciuon. For this purpofe, inftrufnents called pelvimetres have been invented. M. Coutuoli has propofed one for in¬ ternal u(e, and M. Baudelocque has recommended one for external application. But however plaufible in theory the ufe of fuch contrivances may appear, it is now well known that no dependence can be placed upon them in adlual practice, and therefore the hand of the operator muft be had recourfe to for determining both the drape and the extent of the apertures of the pelvis, wherever there is any narrowmefs. The fol¬ lowing directions for this purpofe given by Dr Wallace Johnfon are extremely judicious. “ On palling the finger along the vagina, if the coc¬ cyx, or any part of the facrum, be felt unufually forwards or near at hand j or if the fymphyfis, or any other part of the pubes, is found projecting rather inwards than outwards, it is evident that the pelvis is diftort ed. In wdrich ca(e, as well as in thofe where it is not diftorted, but only very fmall, the principal part of the child’s head (allowing the prefentation right) re¬ mains high, the vertex making only a little round tu¬ mor within the brim : fo that when the os uteri is open¬ ed, and come a little forv/ards towards the pubes, the capacity of the pelvis may be found out by moving the end of the finger round that part of the head which has entered the upper ftrait. This method is ufed by feveral praftitioners in London. However, (hould the finger not be long enough to effeCl it properly, as fometimes is the cafe, there is then another method, which, being more certain, may be ufed, provided it be done with tendernefs and caution, and when the ori¬ fices are fo well opened as to admit of it with fafety. But previous to it, the operator muft be wTell acquainted with the dimenfions of his own hand, viz. “ Firft, II5 116 11S (l) Differtatio Inauguralis de Diverfo Partu, &c. AuClore Matth. Saxtorph. p. d&. 1 Chap. TV. M I D W I F E R Y. Fretrrna- tural Par¬ turition. irp “ Firft, The fingers of a mlddle-fized hand (as we may fuppofe the operator’s to be) being gathered toge¬ ther equally into the palm, and the thumb extended and applied clofely along the fecond or middle joint of the finger 5 the diftance between the end of the thumb, and outer edge of the middle joint of the little finger, is ufu- ally four inches. “ Secondly, Whilft they are in the above pofition, the diitance from the thumb, at the root of the nail, in a ftraight line to the outfide of the middle joint of the little finger, is full three inches and a half. “ Thirdly, The fingers being ftill in the fame fitua- tion, and the thumb laid obliquely along the joints next the nails of the firft two fingers, and bent down upon them ; the diftance between the outfide of the mid¬ dle joint of the fore finger, and the outfide of that of the little finger is three inches and a quarter. “ Fourthly, The hand being opened, and the tops of the four fingers being a little bent, fo as to come nearly in a ftraight line; their whole breadth, acrofs the joint next the nails, is twTo inches and a half. “ Fifthly, When the firft three fingers are thus bent, their breadth acrofs the fame joint is two inches. “ Sixthly, The breadth of the firft two, acrofs the nail of the firft; finger, is one inch and a quarter. “ And feventhly, The fingers being gathered into a conical form, the thumb lying obliquely upon the palm of the hand with its point upon the firft joint of the ring finger, reckoning downwards, will meafure in thicknefs, between its back and the fore part of the thumb, two inches and two eighths. ‘W Now, as hands are extremely various, the operator ought always to know how much the lize of his dif- fereth from the above dimenfions j and this being rightly underftood, the application may be made as follows: “ The patient, being in the pofition as for natural delivery, and the operator’s left hand being well anointed, and the fingers and thumb gathered into a cone, it muft be gently pafled into the vagina* and then through the os uteri, unlefs in this part there is ftill a rigidity to forbid it; if fo, the fingers only muft be paf- fed, their extremities formed into the fourth dimenfion, and then placed edgeways in the ftrait 5 which being done, if the fore finger touch the angle of the fa- cram, and the little one the fymphyfis of the pubes, the width is then manifeftly no more than two inches and a half a fpace through which a mature child can neither pafs alive, nor be brought fo by art, unlefs it happens to be preternaturally final! indeed.” Three methods of pra&ice have been adopted in cafes of fuch narrewnefs of the pelvis as renders it impoffible for the child to be produced alive, viz. the operation of embryulcia or embryotomy, the Caefarean fc&ion, and the divifion of the fymphyfis pubis. I. Embryotomy. The cafes requiring this molt Ihocking operation are thofe where the infant cannot be extrafled alive through the natural paffages; w'hile there is, neverthelefs, fuch fpace that it may be torn away piece-meal without injury to the mother. Of courfe, in thefe cafes the life' of the woman can be faved only at the expence of her infant. But although authors and pradlitioners in modem times adopt in general this principle, they differ ma¬ terially in their account of the precife cafes requiring the operation. Dr Ofborn alleges, that, as the head of the infant at the full time of utero-geftation cannot be diminiih- ed to lefs than three inches between the parietal pro¬ tuberances by the natural contraftions of the uterus forcing it againft the bones of the pelvis j wherever the aperture at the brim or outlet falls under three inches, the operator ought to proceed as foon as poflible to open the head of the infant. But on fo very ferious an operation as that by which one life is deflroyed, it becomes a praftitioner to adopt no rule which can be at all liable to error; and it is evident, that there are three very ftrong objeftions to this precept of Dr Ofborn. Firft, It is impoffible in any cafe at the beginning of labour, to afcertain that the infant is at the full term of utero-geftation •, but it is well known, that a child at the age of between feven and eight months, it bom alive, may be reared to maturity, and that fuch a child is capable of being expelled without>in- jury, through an aperture incapable of permitting the paffage of a full grown foetus. Secondly, The heads of children, even at the full time, are iometimes fo fmall and fo yielding as to ad¬ mit readily of their fliort diameter being diminiffied be¬ low three inches. Thirdly, Every candid practitioner muft allow, that it is quite impoffible to afcertain with geometrical ac¬ curacy the precife dimenfions of the pelvis 5 and con- fequently wdiat in any given cafe may appear to the operator to be lefs than three inches, may in fa£t be above thefe dimenfions. For thefe reafons, wherever the narrowmefs is not ob- vioufly very confiderable, the prudent rule is to afcer¬ tain the effeft of the labour-throes, firpporting the ftrength of the patient, and palliating diftreffing fymp- toms. By adopting this rule, the practitioner will not only have the confcioufnefs of not having deftroyed life unneceffarily, where he is eventually forced to open the head, by the conviClion that it is too large to pafs unopened, but alfo the innate fatisfaCHon of fcmetimes faving a life, which under lefs cautious .management muft have been facrificed. Great care indeed is ne- ceffary in fuch cafes not to be deceived in the eftimate of theprogrefs of the child, for the fwelling of the fcalp may miflead a young praftitioner. < There has been a variety of opinion too, refpeCling the lowed: dimenfions of the pelvis which permit the operation of embryulcia wath fafety to the mother ; and it is furely unneceffary to ftate, that unlefs there be a moral probability of faving the life of the mother by this operation, it ought never to be had recourfe to. Dr Kellie, of London (p), and Dr Ofborn (q), have recorded fome cafes where this operation was performed, I 2 although (p) Dr Wallace Johnfon. (O Dr Ofborn’s Effays. 68 M I D W I F E P. Y. Chap. IV.' Pretema• altliough the naiTownefs was very great; and the latter ^tuntim\' gent^erDan5 funding on a fmgle cafe, affumes the prin- - ciple, that whenever there is a fpace equal to an inch and an half between pubes and facruin, the operation of embryulcia is praflicable. But a careful perufal of the cale alluded to (a) mull fatisfy any unprejudiced perfon that there mull have been lome miltake, moll probably, from the fwelling of the foft parts lining the pelvis having added to the apparent narrownefs, and having, after the head had been opened above 36 hours, fublided. And at any rate, fince experience has noxv fully eftablidied the faff, that the danger refulting from this operation is always in proportion to the de¬ gree of reiiftance, it may be concluded that the opera¬ tion of embryulcia cannot prove fafe to the mother, un- lefs, firlf, there be an aperture equal to about two inches by four 5 and, fecondly, the narrownefs be chiefly, if not altogether, confined either to the brim or the outlet. When both brim and outlet are deficient, and the cavity is deeper than ufual, even although the feveral apertures be quite fufficient to allow the diminilhed head to be ex- trafled, the injury that mull accrue from the violent preffure on all the parts within the pelvis would de¬ ter any prudent practitioner from hazarding fuch an operation. When it is determined to have rccourfe to the opera¬ tion of embryotomy, the inflruments required are the perforator, the crotchet, and the embryotomy forceps delineated in the plate. ^22 r] he operation is to confift of two different procelfes ; fir ft, the diminution of the head ; and, fecondly, the extra&ion of the mangled child. In many cafes the latter ftiould be performed immediately after the former is accompliflied ; but whenever the refiftance is very confiderable, an interval (hould be interpofed between the two. The advantages refulting from this praCtice were firft publicly noticed by Dr Oihorn, though there can be little doubt that the praCtice itfelf was the eflieCt of neceffity. By waiting after the head has been open¬ ed, the woman’s ftrength will be reftored, fo that the afliftance of the pains in the expuliion of the child may be obtained •, the fwelling of the foft parts will fubfide, by which the refiftance may be greatly leffened, as well as the danger of inflammation removed, and the child’s body will become putrid, by which its extraction may be greatly facilitated. 323 In opening the head, which is to be done by means of the perforator, the two great points to be aimed at are to avoid injuring any part of the w’oman, and to make a fu flic lent ly large opening of the head. On the complete accomplifhment of the latter, the eventual fuccefs of the operation muft depend in all cafes of ex¬ treme deficiency of fpace. Should it be found expedient to delay the extfaClion of the imarst after the head has been opened and its contents evacuated, the teguments are to be carefully brought over the ragged edges of the bones, fo that in the event of labour throes recurring, there (hall be no rifk of the parts within the pelvis being injured. When it has been found proper to proceed to the ex- Preterna- traClion of the infant, the firft; thing to be attempted is ^ral Pan¬ to diminiih the bulk of the cranium as much as poflible. tur^K^" . This may be done by means of the embryulcia forceps, l2A delineated in the plates, and contrived it is believed by Dr Lyon of Liverpool. It is an inftrument far fupe- rior to the almifdach of the Arabians, in ufe even within thefe fifty years among the praClitioners of this ifland (b). After the head has been fufficiently reduced in bulk, the crotchet is to be fixed at firft on the infide of the cranium •, and while two fingers of the left hand are to be kept conftantly fo applied that if the inftrument fhould flip in the procefs of extraClion, it (hall be re¬ ceived on the fingers, and cannot poffibly touch any part of the mother, the operator is to draw down with a fuitable exertion of force, in fuch a direction that the largeft part of the head (hail be brought through the wideft part of the pelvis. In fome cafes, much time and very violent exertions are required to accomplifti the delivery ; but, if the proper precautions to prevent any injury to the paffages be adopted, and if at the fame time the operator imi¬ tate nature by working only from time to time, and in- creafe the force employed gradually as may be required, and perfevere patiently, notwithftanding the refiftance, taking care to fupport by nouriftiment and cordials the ftrength of the woman, the delivery at laft will be completed. The dangers to be dreaded from this moft (hocking 125. operation, are injuries of the paffages, from the inftru- ment’s flipping through the embarraffment of the prac¬ titioner 5 or violent inflammation of all the contents of the pelvis extending to the abdomen, in confequence of the parts through which the child muft; be fo forci¬ bly extracted being feverely bruifed. Accordingly, a greater number of women die from the effefls of this operation than praflitioners are willing to admit ; and indeed, in every cafe of extreme deficiency of fpace, where embryotomy is performed, the recovery is to be regarded as doubtful. This operation is fometimes had recourfe to in cafes where the forceps ftiould have been ufed had the child been alive. But fuch cafes are very rare, becaufe the evidence of the infant in utero being dead, is feldom fo complete as to juftify the practitioner proceeding on the principle that it is fo. II. By the Ccefarean feElion is meant the extraction of ^ the infant through the parietes of the abdomen by an in- cifion into the uterus. This bold operation was perhaps never performed by the ancients on the living fubjeCt, and certainly was firft recommended to practitioners by M. Rouffet in his Traite nouvelle, de PHysterctomie, &c. 1581. Since that time it has been often performed on the continent, and about twenty times in Great Britain. The fuccefs of this operation recorded in the early works has cer¬ tainly been exaggerated ; but it appears by an elabo¬ rate memoir by M. Baudelocque, tranflated into Englifh by (a) Ofborn’s Effay, p. 240. (b) For an account of the ancient inftruments employed in the praClice of midwifery, fee Sculteti Arma- jqent. Qhir. Chap. IV. M I D W 1 F E R Y. 69 Preterna- by Dr Hull of Mancbetfer, that during the 50 years tural Par- preceding 1801, the operation has been had recourfe turn,on. to on t.jle contjnenj times, and that 37 of thefe cafes proved fuccefsful. In Great Britain, on the contrary, this operation has never yet fucceeded, a circumftance to be attributed partly to the delay which has always taken place after the neceffity for fuch an expedient had been determined, and hence the patient, at the time the operation was performed, muft have been in a ftate of exhauftion ; and partly, perhaps chiefly, to the pre¬ vious very alarming ftate of health of the fubjetls of the operation in this iflar.d. It is at any rate certain that all over the continent practitioners have lefs horror at performing the Csefarean feclion than Britifh practi¬ tioners have commonly fhewn •, and it is deemed neceffary in cafes where the operation of embryulcia is preferred in this country, and where of courfe the women are not in fuch a precarious ftate of health as thofe com¬ monly are who have extreme narrownefs of the pelvis. 127 In confequence of the fatality of the Ccefarean fec- tion in Great Britain, feveral eminent praftitioners have regarded it as unjuftifiable. Dr Oihorn has ren¬ dered himielf particularly confpicuous on this fubjeCt, and ufes very ftrong language in reprobation of it. His arguments are, its acknowledged fatality ) the capability of completing the delivery by means of the crotchet, in cafes of fuch deformity of the pelvis, that there is no more than one and a half inch between the pubi» and facrum, or to one fide of the projecting facrum j and the impoffibility of impregnation taking place in cales of greater deficiency of fpace. We (hall notice thefe arguments in their turn. 1 ft, IVte acknowledged fatality of the operation.— This relates only to the refult of the operation in Great Britain ) for, as already mentioned, a great proportion of the patients has been faved on the continent. But in infilling on this argument Dr Olborn has over¬ looked that the objeCt of the operation is to fave, if polfible, two lives, and at any rate one. Now if it can be fatisfaClorily proved, that on fome occafions the operation of embryotomy is abfolutely impracticable, it becomes the duty of the practitioner to fave one life at leaft) and it is well known that the Caefarean opera¬ tion is far lefs painful to the woman than that of em¬ bryotomy, even where that latter operation is eventual¬ ly luccefsful. In fuch cafes of extreme deformity, either an attempt ihould be made to deliver the woman and fave the child, or both muft be allowed to perifti; for the operation of embryotomy, if attempted, muft be ' regarded as wilful murder. 229 2dly, Ihe praBicability of tearing away the child in pieces by means of the perforation and crotchet, in cafes wTere there is no more than an inch and a half be¬ tween the pubft> and facruna, or to one fide of the pro- jeCIing facrum, is alleged by the doCIor on the founda¬ tion of a fingle cafe, that of Elizabeth Sherwood al¬ ready referred to. But any perfon who fhall take the trouble to have the aperture of Sherwood’s pelvis, as ftated by Dr Olhorn cut out in wood, and to compare this with the balls of an infant’s fkull as much diminilh- ed. as polfible by the crotchet (which is done in the courfe of his leClures by the profelfor of midwifery in this univerfity), muft be convinced, that there was fome miftake in the fuppofed dimenfions of that wo¬ man’s pelvis. And it is quite obvious, that unlefs there be the fpace already ftated, viz. three and a half or four inches by two, it is unfafe to extraCl the mangled child through the natural paffages. allegation that wrhere there is a greater degree of narrownefs of the pelvis than that which was luppo- fed to have happened in the cafe of Shenvood impreg¬ nation cannot take place, is quite inconfiftent with fafls. One of the moft remarkable cafes of extreme defor¬ mity is that of Elizabeth Thompfon, on Whom the Cmfarean operation was performed at >Manchefter in 1802. The defcription as given by Dr Hull (g) is as follow-s: “ The pelvis of this patient w’as not nearly fo foft as has fometimes been obferved. It Hill had a confider- able degree of bony firmnefs. The olfa innominata at their facro-iliac fynchondrofes, and at the fymphyfis pubis, before the pelvis was dried, admitted of a flight degree of motion.—The diftance from the crifta of one os ilium to the other, at their moft remote points, meafures ten inches and a half. “ The alte of both ofla ilia are very much bent"; and on the left fide the curvature is fo great, that it meafures only two inches from the anterior and inferi¬ or fpinous procels to the oppofite pofterior point. The lumbar vertebrae project forwards or inwards, and make a confiderable curve to the left fide of the pelvis. The diftance from the lower part of the fecond lum¬ bar vertebra to the anterior part of the fpine of the os ilium, on the left fide, is two inches. The diftance from the low'dl part of the fecdnd lumbar vertebra to the anterior part of the fpine of the os ihum, on the right fide, is five inches. “ Superior aperture. The conjugate or antero-pof- terior diameter, from the fymphyfis pubis to the upper edge of the laft lumbar vertebra is one inch and a half. —This diameter is not taken from the os lacrum, or its jundion with the laft lumbar vertebra, becaule the point of their junction is fo much funk into the pelvis, that the place it flrould have occupied, is reprefented by the jundion of the fourth and fifth lumbar vertebra. The tranfverfe'diameter meafures four inches and five- eighths. It is taken from one facro-iliac fymphyfis to the other. The diftance of the point of this aperture, which is oppofite to the anterior part of the right aceta¬ bulum, from the lumbar vertebra, is only half an inch. The diftance from that part of this aperture, which correfponds with the pofterior part of the right aceta¬ bulum, to the os facrum is three-fourths of an inch. The diftance of the point, correfponding with the an¬ terior part of the left acetabulum, from the lumbar vertebra is five-eighths of an inch. The diftance of the point of this aperture, oppofite to the pofte¬ rior part of the left acetabulum, from the os fa¬ crum, is three-fourths of an inch. The diftance of one os pubis from the other, in the points marked in the plate, is feven-eighths of an inch. The di¬ ftance from the right ;fercro-iliac fymphyfis to the fym¬ phyfis pubis is three inches and three-fourths. The di¬ ftance Preterna¬ tural Par¬ turition. 150. 132 (c) Obfervations on Mr Simmons’s Detedion, &c. p. 195. 70 M 1 t> W Pretcrna- Aance from the right facro-iiiac fymphyfis to the left os Puhis is three inches and three-eighths. The diilance u——from the left' facro-iiiac fyrnphyfis to the fymphyfis pubis is three inches and five-eighths. The di- ilance from the left facro-iiiac fymphyfis to the right os pubis is three inches and one-fourth. The largeft circle, that can be formed in any part of the fuperior aperture, does not exceed in diameter one inch. 1'52 “ Inferior aperture. The diflance from one ramus offis ilchii to the other, where they are united with the rami ollium pubis, meafures only half an inch. The diftance from the tuberolity of one os ifchium to the other meafures one inch and two-tenths. The conju¬ gate or antero-pofterior diameter, taken from the fym¬ phyfis pubis to the point of the os coccygis is three inches. “ The angle, included by the rami of the ofifa pubis, is very acute, viz. an angle of about 20 degrees. The perpendicular height from the tubera of the offa ifchia to the inferior margin of the fymphyfis pubis is two inches and a half. The perpendicular height of the fymphyfis pubis is one inch and a half. The tuberofi- ty of the left os ifchium advances forwards, beyond that of the right, about fix-tenths of an inch, and the whole of the rami ofiis pubis and ifchii on the left fide projects beyond thofe of the right. The perpendicular height of the os facrum and coccyx is two inches and one-fourth only, the os facrum being bent fu as to form a very acute angle. The acetabula, at their neareft points, are only three inches diftant. The fymphyfis pubis is much more prominent than natural. The up¬ per margin of the fymphyfis pubis is fituated as high as • the bottom of the fourth lumbar vertebra.” It appears then, that Dr Ofborn’s arguments are fal¬ lacious, and that cafes occur where the operation of efnbryotomy is neither fafe nor practicable. Under iuch circumftances, the Crefarean ftClion muft be had recourfe to ; and it is therefore to be regarded as an operation of neceffity, not one of choice. If this rule be adopted, the cafes requiring fo formidable an expe¬ dient will happily be very feldom met with. *33 Mr Simmons ' of Manchefter, obferving that Dr Ofborn’s third argument is untenable, has propofed in the following words, another fubftitute for the Ctefarean operation. “ When a cafe fliall arife in which the child cannot be delivered by the crotchet, from the brim of the pel¬ vis being no more than one inch in diameter ; I propofe to combine the two operations, and to divide the fym¬ phyfis pubis to make way for the crotchet. Dr Ofborn has urged feveral objections againft this propofal, al¬ though he admits that the operation at the fymphyfis is not fo certainly fatal as the Caefarean feCtion. Weighty objections doubtlefs prefs againft it ; but whilft there are no other means for preferving life, bad as the chance is, it becomes a queftion whether it be worth rifking ; and, after maturely confidering the cafe, fhould an attempt for faving the life of the mother be judged expedient, as the laft refoutce it may be adopted. “ 1 he (pace gained has been differently ftated at from three to eight or nine lines in the diameter •,—the me¬ dium diftance would probably be fufficient to accomplifh delivery by the crotchet. “ The objections urged againft this mode of delivery, when the head is of the full ftze, will not apply to its I F E R Y. Chap. IV. reduced bulk •, and it fhould be remembered, that the Pretema- fymphyfis is formed of cartilage and ligament ; fo that turaj far_ whatever preffure fhall be made againft; the divi- , tuntlon- _ ded edges, will not be made againft the fharp angles v oi bone. That much injury may be done anteriorly will not be denied ; but, does the continued preffure of the child’s-head never produce mifebief in other ca¬ fes ? By the introduction of a female found for a guide, a cautious and fteady operator will avoid wounding- the urethra j and, as the bafe of the fkull will probably be turned fideways, it will fuffer lefs in extraction than in other cafes of the crotchet j in which it mult in general be injured from preffure againft the pubis. If the repa¬ ration, however, be carried beyond a certain length, laceration will probably enfue and, Ihould this acci¬ dent occur, I fee no realon to apprehend more danger from it than follows the extraction of a large ftone from the bladder through a fmall opening, which will induce a lacerated wound, but whieh we know will not uncommonly heal. The lacro-iiiac ligaments would certainly not be injured by choice, but the confequences, I believe, are not generally fatal} and, fhould it be urged that great pain and lamenefs will affliCt the pa¬ tient for a long time after, a reply wall readily occur, that life was at flake ; and finely there are few-who would not compound, for the profpeCt of temporary pain and inconvenience, to have it preferved to them. “ A fpontaneous feparation fometimes occurs, both there and at the pubis •, and yet the patient has been again reftored to health. “ I do not fee, in other refpedts, in what this com¬ pound operation differs from the molt difficult crotchet cafe—the Caefarean fedtion is certainly fatal to the mo¬ ther in this country—the life of the child, it is agreed, fhall not be put in competition wuth the parent’s life— the fedtion of the fymphyfis is neither fo formidable nor fo fatal as the Caefarean fedtion—and the crotchet has been fiiccefsfully applied in dimeniions which will pro¬ bably be thus acquired. “ Upon the whole, then, in that fuppofed cafe of dif- tortion (which I hope will never happen) in which the mother muft be doomed to death, from the impoffibi- lity of delivering the child by the crotchet, the com¬ pound operation I have recommended will furnifh a re- fource, approved by reafon and fandtioned by experience 5 inafmuch as the fedtion of the fymphyfis pubis has been made, and the crotchet has been ufed, though feparate- ly, yet with fafety. Such a cafe will be attended, un- queftionably, wdth additional hazard •, but it offers the only chance to the mother, to the prefervation of whofe life our chief care flisuld be diredted : and, I hope that in future all trace of the Caefarean operation will be baniffied from profeffional books •, for it can never be juftifiable during the parent’s life, and ftands recorded only to difgrace the art.” He himfelf has afforded the moft fatisfadlory evidence 13^ of the abfurdity of his owm propofal ; for he had not publifired it many months when the very cafe he had deferibed as ideal adiually occurred in his neighbourhood, and he had the oppoi’tunity of making the experiment of his own plan. But he fhrunk from it, and no wonder j for the w'oman was Elizabeth Thompfon, whole pelvis has juft been deferibed. It is unfortunate that Mr Simmons has not had the candour to confefs his error, and to retraft his opinions, more efpecially fince his re¬ flexions Chap. IV. MIDWIFERY. 7i tuntion. *35 Pretema- flefllons againft the Cuefarean operation, were couched tural Par- jn language peculiarly bitter and inventive. With refpeft to the mode of performing the Caefarean fe&ion, there has been confiderable variety of opinion. On theoretical principles, the external incifion, viz. that through the parietes abdominis, ought to be in the diredion of the linea alba, becaufe there is lefs chance of any conliderable retradion of mufcular fibres, or of interfering with the inteftines, than if it were made in any other diredion. But the refult of the pradice feems at variance with the theory. According to the teftimony of Baudelcque, of 35 operations, where the incifion was made on the fide of the abdomen, eighteen proved fuecefsful; of thirty in the diredion of the linea alba, ten only fucceeded ; and of eight in the manner recommended by Lauverjat, that is, by a tranfverfe in¬ cifion between the redi mufcles and fpina dorfi, three fucceeded. But it may be remarked, that the event, in many of thofe cafes, may have been influenced by a variety of circumftances, totally independent of the line of diredion of the external incifion. In whatever part of the abdomen the external inci¬ fion be made, it ought to be extended to fix inches 5 and, previous to cutting Into the- uterus, any adive arterial branch, which may have been divided, muff be fecured ; and the liquor amnii, if not already difcharged, muft be drawrn off. «The opening into the uterus need not be above five inches in length, and fhould be made as much towards the fundus as poffible. Means are to be employed to prevent the protrufion of the inteflines at the time the uterus is emptied. Both foetus and fecun- dines are to be quickly extraded j after wdrich, the hand is to be paffed into the uterus, to clear out any coagula w7hich may have formed within its cavity, to prevent the os tincae being plugged up, and, at the fame time, to promote the contradion of the uterus. The wound in the uterus is to be left to nature •, but that of the parietes of the abdomen is to be carefully clofed by means of the interrupted future and achefive flraps •, and the w-hole belly is to be properly fupported by a fuitable bandage or waiflcoat. In the after treat¬ ment of the patient, the great objeds to be held in view, are to fupport the flrength and moderate the de¬ gree of local inflammation. III. Divijion of the fymphysis pubis.—This was origi¬ nally propofed and performed by M. Sigault of Paris. His propofal wTas made in 176S ; but he had no opportuni¬ ty of making the adual experiment till September 1777. —The fuccefs of his firft cafe wTas fuch, that a medal was flruck to commemorate the event \ and the opera¬ tion w?as admired and recommended, with all the extra¬ vagance of French enthufiafm. The operation confifts of the divifion of the fymphyfis pubis and feparation of the innominata. For this pur- pofe, a catheter is to be introduced into the urethra, and, with a common fcalpel, the articulation is to be cut through from the upper edge of the fymphyfis, to within a quarter of an inch of the inferior edge. By feparating the thighs, the divided bones are forced afunder. After this, the operator is either to turn the tural Par¬ turition. r37 child, or to extradt it by the forceps, according to the Pnterna- circumftances of the cafe. This expedient was propofed as a fubflitute, both for the operation of embryulcia, and for the Caefarean fec- tion, as it w’as alleged to be perfectly confident with the fafety both of mother and child. It is quite unneceffary for us to offer any theoretical objedlions to this operation, becaufe wre can {now reafon on the event of thirty-fix cafes, which have been publilh- ed.—But thole who may wilh to invedigate this fubjedl, may confult Baudelocque, par. 1994. and 2091. inclufive; and Dr Olborn, p. 271. To that latter pradlitioner’s profeflional zeal and ability is chiedy to be aferibed the total rejedlion of this operation in Great Britain. Of the thirty-five fubjecls of the publhbed cafes (for in one woman it wras periormed twice), fourteen women and eighteen children died.—Of the twenty-one wo¬ men who furvived, nine had either'had living chil¬ dren before the Sigaultian operation, or had fuch at a fubfequent period. Mod of the remainder differed much from the operation. Some had incurable incon¬ tinence of urine, others lamenefs, &c. But the mod important fa£l is, that whenever the bones of the pelvis were feparated from each other above an inch (and no fpace of any confequence could be added to the brim, unlefs they wTere fo), the facro-iliac fynchondrofes wTere torn, and no woman furvived that accident. Thefe fafts have at lad convinced foreign practition¬ ers of the futility of this expedient j and, accordingly, for above ten years, it has not been performed on the continent by any pradlitioners of refpectability. When a woman, with a narrow pehis, who has had the good fortune to recover after the operation of em¬ bryotomy, again falls with child, die fhould not incur the hazard of a repetition of fo horrible an operation ; But ought to have premature labour induced between the feventh and the eighth month. Under the direc¬ tion of an intelligent pradlitioner this operation is eafily performed ; and, while it affords the only chance of faving the infant, which it is the duty of the mother and of the praclitioner to attempt, it at the fame time, by leffening the refidance, diminilhes both the differing and the rifk of the patient (n). For a further account of the practice in cafes of ex¬ treme deformity of the pelvis, the reader is referred to Olborn’s Effays; Hamilton’s Letters to Oiborn j Sim¬ mons’s Reflections, and Hull’s Deletion of Simmons. Sect. IV. Of the Deviations from Natural Labour T3i> which happen from anomalous circum/lances. Certain circumdances befides thofe already enume¬ rated occafion deviations in the procefs of labour. Some of thefe refpet the child, and others the woman. a. The child’s life is endangered if the navel-dring be fo drongly convoluted round its neck, that after the head is born the remainder cannot be expelled without the cord being drawn fo tight as to interrupt the circu¬ lation through it. Dr Denman, vol. ii. p. 16. has dated this as a caufe of protradted labour, and has ad- vifed *32 140 (n) See a paper on this fubjedf, in the 18th volume of the Medical Fadls and-Obfervations, by Mr Barlow. Preterna¬ tural Par¬ turition. Mi 142 M3 M I D W I F E R Y. Chap. IV vifed certain modes of practice in confequence. But if there be pains, there cannot be any material protrac¬ tion of the labour from this caufe. All rilk of-the infant may be prevented by flacken- ing the cord, and waiting for the action of the uterus, if the operator find that he cannot draw the loop of cord which furrounds the child’s neck eafily over its head. But this in mod cafes can be readily done. b. The cord is fometimes pufhed down before the prefenting part of the child. If this happen before the membranes are burft, the only certain method of faving the ^child is to perform the operation of turning as foon as the date of the paf- fages will permit. When the cord is pufhed down along with feme other part, as the head, after the waters are difcharged, a variety of pradlice is required according to the cir- cumdances of the particular cafe) hence merely keeping the cord for a little time beyond the prelenting part by means of the fingers, or wrapping it up in a piece of fbft rag, and pulhing it above the prefenting point, or the application of the forceps, are feverally found ufe- ful in different cafes. c. Sometimes one or both arms of the child are for¬ ced down along with the head, where proper adidance is not had at the beginning of labour. If the pelvis be roomy, and the woman have formerly had children, the delivery may be at lad completed by the natural powers, notwithdanding this increafed degree of refid- ance. But in many cafes of this kind an experienced pra&itioner is not called in till the drength of the wo¬ man be very much exhauded, and then it becomes ne- ceffary to ufe the forceps, or even on fome occafions to have recourfe to the operation of embryulcia. It is well known, that fometimes there is more than one child in the womb. Indances where there are twins are not unfrequent *, cafes of triplets are alleged to happen once in between three or four thou- fand births ; four at a birth have not occurred in this city for the lad twenty-feven years ; and there afe 'only two, or at mod three, well-authenticated cafes of five at a birth having happened within a hundred years in this illand. All the figns by which the exidence of more than one child in utero can be afeertained, previous to the actual commencement of labour, are fallacious 5 and in general it is not till after the birth of one child that it can be determined that another remains in the womb; and, unlefs under very particular circumdances, it is of no importance. The circumdances alluded to are where different parts of both children are forced in¬ to the paffage at the fame time. Of this a very re¬ markable cafe is recorded in the book of Geneds, verfe 27. chap, xxxviii. When the womb appears to remain bulky and hard after the birth of one child, there is reafon to fuppofe that it contains a fecond. But if there be any doubt on the fubjecl, the praftitioner has it in his power to afeertain the point by examination. When there is no fecond child in the uterus, the further the fingers are carried, up within the paffages, the more con- traefed do they feel-, whereas, if there be a fecond child, the more @pen are they found. Whtm it is afeertained that another infant remains, the woman’s belly diculd be immediately compreffed by¬ means of a roller, in order to prevent faintidmep, from the hidden relaxation of the parietes abdominis, and the portion of the naval firing remaining attached to the after-birth of the firft born fhould be care¬ fully fecured, left the veffels of the placenta anafto- mofe. In regard to the fubfequent treatment, there Ins been much variety of opinion among praftitioners. Some have propofed waiting till the aftion of the uterus expel the fecond as it had done the firft in¬ fant. Others urge ftrongly the necefiity for immediate delivery. Againft the former of thefe praflices it is to be ob¬ jected -, firft, that in fome cafes, days or even weeks have been known to intervene between the birth of one child and the a£Hon of the uterus which expelled the fecond. Secondly, that if this happen, the paffages muft become contracted and their fubfequent dilatation may be productive of infiasronatory fymptoms. Ihird- ly, that during the time the uterine aCtion is fufpended, internal haemorrhagy may take place, and may deftroy the patient. And, fourthly, the fecond child may be fuddenly forced down in fuch a pofition, as may endan¬ ger its life, and at the fame time occafion great pain to the mother. For thefe reafons it is now an eftablifiied rule among judicious praftitioners, to examine the iituation of the fecond infant, as foon as the patient (hall have reco¬ vered from the (hock of the birth of the firft child ; and, if its pofition be natural and the patient have not been exhaufted by the previous labour, and pains come on, to rupture the membranes, and allow the natural powers to complete the delivery. But if the infant prelent any other part than the head, or though the head do prefent, if the woman be exhaufted, or if there be no appearance of the return of pains within an hour after the birth of the firft, then the hand is to be palled up to bring down the feet of the fecond child, and the delivefy is to be expedited. The extrafUon of the pla¬ centae is to be condufted with great care, and every poflible precaution is to be adopted againft the occur¬ rence of flooding, which is always to be dreaded as the confequence of plurality of children. The fame principles apply to the management of tri- - plets, &c. d. Umbilical hernia, to which women are perhaps more |fubjeCt than to 'any other fpecies of rupture, may influence the labour materially. If it be reducible, it difappears after the fifth month of pregnanfiy but immediately after the expulfion of the child it returns, and occafions frightful huntings and floodings. This may be prevented by the Ample expedient of having the belly compreffed by a roller in fuch a manner, that in proportion as ther infant advan¬ ces, the compreflion may be increafed. Should it be irreducible, if the hernia be affeCted by the continuance of labour, as may be known by the colour &c. the operation of turning muft be had re¬ courfe td. e. Convulfions fometimes happen during labour, and occafion great danger both to the mother and the child. The woman is quite infeftfible during the fit,, which con fills of violent convulfions of the mufcles which move the body, and of thofe of the eyes, the face, and the lower jaw; it iafts in-fome cafes only a few feconds, Preterna¬ tural Par¬ turition. MS 146 M7 M4 Chap. IV. M I B W Pi term- and in others for feveral minutes. After the fit has tur d Par- ceafe(jj Sometimes happens that the patient remains ^ tuiu.on. -r) ^ C0mat0fe flate; in other cafes the fenfibility retyrns. The circumfiances which diftinguiih this difeafe from epilepfy were firft dated explicitly by Dr Hamilton in the Dr'Bun- following words: “ The old diftin&ion betweeheclampfia m// volv ant* eP^eP^a ^as been rejected by Dr Cullen, without fuffi- p ‘ 'cient reafon. The con vulfions that occur during pregnan¬ cy and labour, (bould be diftinguiftied by the formername, for the difeafe is always an acute one, and it never, as far as my experience, goes, lays the foundation for habitual epilepfy. To an inattentive pra&itioner, indeed, the phenomena appear fimilar to thofe of epilepfy •, but, in¬ dependent of its violence and fatality, there are many circumftances peculiar to it. This has been remarked by feveral authors, particularly Dr Denman 5 but thofe circumftances have never been accurately pointed out in any publication which has fallen into my hands. “ The eclampfia, peculiar to pregnancy and la¬ bour,' differs from epilepfy in the following refpefts. “ 1. The fymptoms which precede the attack are well marked, announcing to an experienced prabtitioner the approach of the difeafe. “ 2. If the firft fit do not prove fatal, and if no means of cure be attempted, it is within a few hours followed by other paroxyfms, provided delivery do not take place. “ 3. After the paroxyfms, even where they have been very fevere, the patient in many cafes continues quite fenfible during the intervals, and the fenfibility returns the ‘moment the fit is off. “4. What may appear ftill more extraordinary is, that, in fome cafes there is a remarkably increafed fuf- ceptibility of impreflion of the external fenfes 5 and this fuperfenfation is not confined to patients in whom the convulfions are flight. “ 5. The aura epileptica never occurs in the cafes alluded to. “ 6. The pulfe is, in every cafe, affebied in fome degree during the remifiions of the fits. It is flow, or oppreffed, or intermitting, or frequent and rapid. But it is moft tommonly flow and oppreffed, becoming ful¬ ler and more frequent after blood-letting. 149 The fymptoms above hinted at as preceding the fits are, violent, headach, or hidden delirium, or violent tremors during the fecond flage of labour. Impaired or depraved vifion commonly prove the immediate har¬ bingers of the fit. The event of this occurrence is al¬ ways precarious, for a fingle fit may deflroy the pa¬ tient. Death happens in fuch cafes imtwo ways 5 viz. either by rupture of fome of the veffels within the head, or by the rupture of the womb itfelf. 150 The caufe of the difeafe is evidently an overload in the vefiels within the cranium, and this may be occa- fioned from a variety of caufes, as violent labour throes, paflions of the mind, irritations in the primae vise, &c. 151 In cafes of fo very alarming a nature, it is not won-, derful that prabiitioners have differed much refpebfing the pradtice to be adopted. The following is what has been recommended by Dr Hamilton in the volume of Dr Duncan’s annals already referred to. “ When fits have abfiially occurred during the latter months of pregnancy, the firff remedy to be employed, after having adopted the fuitable means for protebfing the tongue, is blood-letting, both general and topical. Vol. XIV. Part I. I F E R Y. 73 Opening the external jugular might anfwer both pur- Preterna- pofes, but the reftlefsnefs of the patient in many cafes turfl.* makes the furgeon or attendants dread this operation.. ' < A quantity of blood, therefore, adapted to the exigency of the cafe, is to be drawn from the arm, and either a branch of the temporal artery is to be divided,-or feve¬ ral leeches are to be applied to the temples. After the bleeding, a powerful laxative glyfter ought to be exhibit¬ ed. And if there be any evidence of difordered primse vise, an emetic muff, if poflible, be given. The (fate of the os uteri is then to be afeertained ; and if labour have not commenced, no attempts whatever are to bfc made to promote that process. In fome rare cafes, however, where the bulk of the gravid uterus is enor¬ mous, it may be neceffary to remove a part of its con¬ tents ; but fuch cafes cannot happen once in a thoufand inftances of the difeafe. “ Should the fits ftill continue, the head muft be fhav- ed, and covered with a large blifter ; and if the oppref- fion or fulnefs, or hardnefs of the pulfe, be not removed, the blood-letting is to be repeated. “ As foort as the patient becomes capable of fwallow- ing, the camphor, in dofes of ten grains, ought to be given every three or four hours. The moft efficacious and . palatable form in which this medicine can be pre- ferihed, is by fufpending it in boiling water, through the medium of alcohol, fugar and magnefia. Its ufe muft be perfevered in for feveral days, gradually leffen- ing the number of dofes. “ Where the eclampfia has been preceded by cedema, the digitalis may be employed with much fuccefs. “ Convulfions during labour are to be treated upon the fame principles, with thefe additional precautions, that delivery is to be accomplifhed by the meft expedi¬ tious poflible means, and that if the ‘delivery be follow¬ ed by uterine haemorrhagy, the difeharge is for fome time to be rather encouraged than checked. J I knew ttvo ' inftances of the fits, which had been fufpended for fome hours, recurring, in confequence of the Hooding being flopped, and in both cafes-the convulfions were remo¬ ved, by allowing the difeharge to return. “ When the fymptoms that precede eclampfia, take place in the latter months of pregnancy, the moft cer¬ tain method of guarding againft the threatening ae-' cident is, having recourfe to immediate blood-lettin, Its apex to which the coccyx is joined. T, The coccyx. Fig. 2. Beprefents a vertical feftion of the pelvis. A, The promontory of the facrum. B, The point of the coccyx. The diftance from thefe two points marks the depth of the pelvis behind, which in the majority of cafes is ftx inches. C, The fpinous procefs of the ifchium. D, The tuberofity of the ifchium. E, The crifta pubis, the diftance which two points marks the depth of the pelvis at the fides, and is ordi¬ narily about four inches. F, The foramen thyroideum. G, The furface by which the two olTa pubis are join¬ ed to form the fymphyfis pubis, and by which jumftion " the depth of the pelvis at the front is reduced to about one and a half inches. Fig. 3. Reprefents the brim of a well formed pelvis. A, B, The Ihort or conjugate diameter between pu¬ bis and facrum, which meafures commonly a little lefs than four inches. C, D, The long diameter in the Ikeleton, which, however, in the living fubjedt, is rendered almoft as Ihort as the former, in confequence of the bellies of the pfoae mufcles being lodged in the lower cavity of the tunica innominata. E, F, The diagonal diameter in the fkeleton, which, in fa£l, is the long diameter in the living body, and meafures fomewbat lefs than five inches. Fig. 4. Reprefents the outlet of a w'ell-formed pelvis. A, B, The fliort diameter, extending from one tu¬ berofity of the ifchium to the other, and meafuring lefs than four inches. C, D, The long diameter, extending from the lotver edge of the fymphyfis pubis to the point of the coccyx, and meafuring nearly five inches. Fig. 5. Reprefents the brim of a diftorted pelvis. Fig. 6. Reprefents the outlet of a deformed pelvis. Plate CCCII. Fig. I. The foetal heart. I ' r f r Srt'/f , ' ■ ' ' — — MIDWIFERY. 77 Page 45. col- 1. lin. 47. 1. 56. 1. 61. 1. 67. I- ERRATA. 16. for explain read attribute. for forms read germs. 2^. for experiment read experience. 35. add to the at the end of the line, navel-11 ring. 20. for exerted read excited.—Same line, the paragraphs from Ai t. 69. to the end of the page f joitld have been marked with inverted commas. 34. dele the. 53* produced read protruded. M I E Mie! MIEL, Jan, called Giovanni della Vite, a molt Mieris. eminent painter, was born in Flanders in 1 j99’ —v—was at fir ft a difciple of Gerard Seghers, in whofe fchool he made a diftinguilhed figure 5 but he quitted' that artift, and went to Italy, to improve himfelf in defign, and to obtain a more extenfive knowledge of the Teveral branches of his art. At Rome he parti¬ cularly ftudied and copied the works of the Caracci and Corregio ; and was admitted into the academy of Andrea Sacchi, where he gave fuch evident proofs of extraordinary merit and genius, that he was invited by Andrea to aftift him in a grand deiign wnich he had already begun. But Miel, through ibme difguft, re- je&ed "thofe°elevated fubje&s which at firft had enga¬ ged his attention, refufed the friendly^ propofal of Sacchi, and chofe to imitate the ftyle of Bamboccio, as having more of that nature which pleafed his own imagination. His general fubjecls were huntings, car¬ nivals, g.ypfies, beggars, paftoral feenes, and conver- fations; of thofe he compofed bis eafel piftures, which are the fineft of his performances. But he alfo paint¬ ed hiftory in a large fize in freico, and in oil j which, though they feem to want elevation cl defign, and a - greater degree of grace in tne heads, yet appear fupe- rior to what might be expelled from a painter of fuch low fubje&s as "he generally was fond of reprefenting. His pi Clares of huntings are particularly admired : the figures and animals of every fpdeies being defigned with uncommon fpirit, nature, and truth. Ihe tranfparence of his colouring, and the clear tints of his Ikies, eftli- ven his compofitions •, nor are his paintings in any ue- gree inferior to thofe or Bamboccio either m their force or iuftre. His large w'orks are not 10 much to be commended for the goodnefs of tne defign as for the expreflion and colouring but it is m his linail pieces that the pencil of Miel appears in its greats ft delicacy and beauty. Flic Angular merit oi this maf- ter recommended him to the favour of Charles Ema¬ nuel duke of Savoy, who invited him to his court, where he appointed Miel his principal painter, and afterwards honoured him with the order or St Mauri¬ tius, and made him a prefent of a cro»i fet witn dia¬ monds of great vale?, as a particular mark of h.s eftcem. He died in 1664. ^ 1 MIERIS, Francis, the Old, a juftly celebrated painter, was born at Leyden in 16355 and was at firft placed under the diveaion of Abraham Toorne Viiet, one of the beft deftgners of the Low Countries, and afterwards entered himfelf as a diiciple with Gerard Douw. In a fiiort time he far furpafted all his companions, and was by his mafter called tne prince of his difciples. H’-s manner of painting fuksj M I E velvets, fluffs, or carpets, was fo Angular, that the Mieris. different kinds and fabric of any of them might ealily ’ v"—- be diftinguiftied. His pidlures are rarely to be feen, and as rarely to be fold 5 and when they are, the pur- chafe is extremely high, their intrinfic value being fo inconteftably great. Betides portraits, his general fub- jefts were converfations, perfons performing on mufical inftruments, patients attended by the apothecary or doffbr, chemifts at work, mercers {hops, and iuch like 5 and the ufuM valuation he fet on his pictures was efti- mated at the rate of a ducat an hour. The fineft por¬ trait of this mailer’s hand is that which he painted for the wife of Cornelius Phats, which is faid to be ftill preferved in the family, although very great Aims have been offered for it. In the poffeffioft of the fame gentleman was another picture of Mieris, reprefenting a lady fainting, and a phyfician applying the remedies to relieve her. For that performance he was paid (at his ufual rate of a ducat an hour) fo much money as amounted to fifteen hundred florins when the pic¬ ture was finilhed. The grand duke of Tufcany wiftied to purchafe it, and offered three thoufand florins for it 5 but the offer was not accepted. However, that prince procured feveral of his pidlures, and they are at this day an ornament to the Florentine coileilion. One of the moft curious of them is a girl holding a candle in her hand, and it is accounted ineftimable. This painter died in 1681. Mieris, William, called the Young Mieris, was foil of the former, and born at Leyden in 1662. During the life of his father, he made a remarkable pro- grefs : but, by being deprived of his director when he was only arrived at the age of nineteen, he had re- courfe to nature, as the moll inftruflive guide 5 and by ftudying with diligence and judgement to imitate her, he approached near to the merit of his father. At firft he took his fubjefts from private life, in the man¬ ner of Francis 5 fuch as tradefmen in their {hops, or a peafar.t felling vegetables and fruit, an i fometimes a woman looking out at a window 5 ail which he copied minutely after nature, nor did he paint a Angle objeift: without his model. As Mieris had obferved the com¬ pofitions of Gerard Laireffe, and other great hiitorical painters, with Angular delight, he attempted to defign fubjects in that ftyle 5 and began frith the ftory of Ri- naldo lleeping on the lap of Armfda, furrounded wjjh the Loves and Graces, the fore ground being enriched wdth plants and flowers; a work which added greatly to his fame, and was fold for a very high price. This mafter alfo painted hmdfcapes. and animals with equal truth and neatnefs 5 and modelled in clay and wax, in fo fharp and accurate a manner, that he might juftly be MIG [ 78 ] MIG be ranked among the moft eminent fculptor?. In the delicate finxfliing of his works, he imitated his father j , as he likewife did in the luftre, harmony, and truth, of his paintings, which makes them to be almon as highly prized ; but they are not equal in refpedl of defignj or of the linking elfefl, nor is ,his touch lo very exquiiite as that of the father. The works of the old Mieris are better compofed, the figures are bet¬ ter grouped, and they have lefs confufion ; yet the younger Mieris is ackhowledged to be an artilt of ex¬ traordinary merit, although inferior to him, who had fcarcely his equal. He died in 1747. Mieris, Fr-aticis, called the Young Francis, was the fon of William, and the grandfon of the celebrated Francis Mieris ; and was born at Leyden in 1689. He learned-the art of painting from bis father, whofe manner and ftyle he always imitated j be chofe the fame fubjedls, and endeavoured to refemble him in his colouring and pencil. But with all his induftry he proved far inferior to him : and moll of thofe pidlures which at the public fales are faid to be of the young Mieris, and many alfo in private colte£tions aferibed to the elder Francis, or William, are perhaps origi¬ nally painted by this mailer, who was far interior to both j or are only his copies after the works of thofe excellent painters, as he fpent abundance of his time in copying their performances. MIEZA, in Ancient Geography, a town of Macedo¬ nia, which was anciently called Strymonium, fituated near Stagira. Here, Plutarch informs us, the ftone feats and lhady walks of Ariftotle were fiiown. Of this place was Peuceftas, one of Alexander’s generals, and there¬ fore furnamed (Arrian.) MIGDOL, or Magdol, in Ancient Geography, a place in the Lower Egypt, on this fide Pihahiroth, or between it and the Red fea, towards its extremity. The term denotes a tower or fortrefs. It is probably the Magdolum of Herodotus, feeing the Septuagint render it by the fame name. MIGNARD, Nicholas, an ingenious French painter, born at Troyes in 1628 j but, fettling at Avig¬ non, is generally diftinguilhed from his brother Peter by the appellation of Mignard of Avignon. He was afterwards employed at court and at Paris, where he be¬ came reftor of the royal academy of painting. There is a great number of his hillorical pieces and portraitsin the palace of the Thuilleries. He died in 169®. Mignard, Peter, the brother of Nicholas, was born at Troyes in 16105 and acquired fo much of the tafte of the Italian fchool, as to be known by the name of the Roman. He ivas generally allowed to have a fuperior genius to his brother Nicholas 5 and had the honour of painting the popes Alexander VII. and Urban VIII. befides many of the nobility at Rome, and feveral of the Italian princes : his patron, Lo lis, fat ten times to him for his portrait, and refpefted his talents fo much as to ennoble him, make him his princi¬ pal painter after the death of Le Bruo, and appointed him dire£lor of the manufa&ories. He died in 1695. and many of his pieces are to be feen at St Cloud. MIG NON, or MinJON, Abraham, a celebrated painter of flowers and Hill life, was born at Francfort in 1639 5 and his father having been deprived of the greatelt part of his fubftance by a feries of Ioffes in, trade, left him in very neceffitous circumftances when he was only feven years of age. From that melan-Migration, choly fituation he was refeued by the friendfhip of v'-~ James Murel, a flower painter in that city 5 who took Mignon into his own houfe, and iiidru&ed him in the art, till he was 17 years old. Murel had often obferved an uncommon genius in Mignon : he there¬ fore took him along with him to Holland, where he placed him as a difciple with David de Heem 5 and while he was under the direflion of that mailer he la¬ boured with inceffant application to imitate the man¬ ner of De Heem, and ever afterwards adheied to itj only adding daily to his improvement, by ftudying nature with a molt exadt and curious obfervation.—■ “ When we confider the paintings of Mignon, one is at a lofs (Mr Pilkington obferves) cvhether moi! to admire the frefttnefs and beauty of his colouring, the truth in every part, the bloom on his objects, or the perfedl refemblance of nature vifible in all his perform¬ ances- He always fliows a beautiful choice in thofe flowers and fruits from which his fubjedts are compof¬ ed : and he groups them with uncommon elegance. His touch is exquifitely neat, though apparently eafy and unlaboured 5 and he was fond of introducing in- fedts among the fruits and flowers, wonderfully finiihed, fo that even the drops of dew appear as round and as tranflucent as nature itfelf.” He had the good for¬ tune to be highly paid for his works in his lifetime j and he certainly would have been accounted the heft in his profeffion even to this day, if John Van Huy- fum had not appeared. Weyerman, who had leen many admired pidtures of Mignon, mentions one of a moft capital kind. The fubjedt of it is a cat, which had thrown down a pot of flowers, and they lie fcat- tered on a marble table. That pidture is in every re- fpedt fo wonderfully natural, that the fpedlator can fcarce perfuade himfelf that the water which is fpiiied from the veffel is not really running down from the marble. This pidture is diftinguifhed by the title of Mignon's Cat. This painter died in 1679, aged only 40. MIGRATION, the paffage or a removal of a thing out of one place into another. Migration of Birds.—It has been generally be-Migration lieved, that many different kinds of birds annually pafsgenerally from one country to another, and fpend the fummer or believed, the winter where it is moft agreeable to them j and that even the birds of our own ifland will feek the moft diftant fouthern regions of Africa, when diredted by a peculiar inftindl to leave their own country. It has long been an opinion pretty generally received, that fwallows refide during the winter feafon in the wrarm fouthern regions 5 and Mr Adanfon particularly relates his having feen them at Senegal when they were obli¬ ged to leave this country. But befides the fwallow, Mr Pennant enumerates many other birds which mi¬ grate from Britain at different times of the year, and are then to be found in other countries 5 after which they again leave thefe countries, and return to Bri¬ tain. The realon of thefe migrations he fuppofes to be a defedt of food at certain feafons of the year, or the want of a fecure afylum from the perfecution of man during the time of courtfliip, incubation, and nutri¬ tion. The following is his lift of the migrating fpecies. f. Crows. Of this genus, the hooded crow migrates £^*1^ regularly with the woodcock. It inhabits North Bri-mignue. tain the whole year : a few are faid annually to breed MIG [ 79 ] M I G Migration, on Dartmoor, in Devonihire. It breeds alfo in Swe- den and Auilria : in fbme of the Swedifh provinces it only drifts its quarters, in others it relides throughout the year. Our author is at a lofs for the fummer re¬ treat of thofe which vifit us in fuch numbers in winter, and quit our country in the fpring ; and for the reafort why a bird, whofe food is fuch that it may be found at all feafons in this country, Ihould leave us. 2. Cuckoo. Difappears early in autumn j the retreat of this and the following bird is quite unknown to us. 3. Wryneck. Is a bird that leaves us in the winter. If its diet be ants alone, as feveral aflert, the caufe of its migration is very evident. This bird difappears be¬ fore winter, and revifits us in the fpring a little earlier than the cuckoo. 4. Hoopoe. Comes to England but by accident; Mr Pennant once indeed heard of a pair that attempt¬ ed to make their neft in a meadow7 at Selborne, Hamp- fhire, but w7ere frighted aw7ay by the curiofity of people. It breeds in Germany. 5. Grous. The whole tribe, except the quail, lives here all the year round : that bird either leaves us, or elfe retires towards the fea coafts. 6. Pigeons. Some few of the ring doves breed here ; but the multitude that appears in the winter is fo difproportioned to w’hat continue here the whole year, as to make it certain that the greateft part quit the country in the fpring. It is molt probable they go to Sweden to breed, and return from thence in au¬ tumn ; as Mr Ekmark informs us they entirely quit that country before winter. Multitudes of the com¬ mon wild pigeons alfo make the northern retreat, and vilit us in winter; not but numbers breed in the high cliffs in all parts of this ifland. The turtle alfo pro¬ bably leaves us in the winter, at leaft changes its place, removing to the fouthern counties. 7. Stare. Breeds here. Poffibly feveral remove to other countries for that purpofe, fince the produce of thofe that continue here feems unequal to the clouds of them that appear in wunter. It is not unlikely that many migrate into Sweden, w'here Mr Berger obferves they return in fpring. 8. Thrujloes. The fieldfare and the redwing breed and pafs their fummers in Norway and other cold coun¬ tries ; their food is berries, which abounding in our kingdoms, tempts them here in the winter. Thefe two and the Royfton crow are the only land birds that re¬ gularly and conftantly migrate into England, and do not breed here. The hawfinch and crofsbill come here at fuch uncertain times as not to deferve the name of birds of paffage. 9. Chatterer. The chatterer appears annually about Edinburgh in flocks during wfinter \ and feeds on the berries of the mountain afh. In South Britain it is an accidental vifitant. 10. Grojbeaks. The grofbeak and crofsbill come here but feldom ; they breed in Aurtria. The pine grofbeak probably breeds in the forefls of the High¬ lands of Scotland. 11. Buntings. All the genus inhabits England throughout the year j except the greater brambling, wdiich is forced here from the north in very fevere feafons. 12. Pinches. All continue in fome parts of thefe kingdoms, except the fifkin, which is an irregular viii- tant, faid to come from Ruffia, The linnets ihift their quarters, breeding in one part of this ifland, and Migration, remove with their young to others. All finches feed v ^ on the feeds of plants. 13. Larks, fly-catchers, wagtails, and warblers. All of thefe feed on infedls and worms 5 yet only part of them quit thefe kingdoms ; though the reafon of mi¬ gration is the fame to all. The nightingale, black¬ cap, fly-catcher, w'illow-wren, wheat-ear, and white-¬ throat, leave us before winter, while the fmall and de¬ licate golden-crelled wren braves our feverelt frofts. The migrants of this genus continue longed: in Great Britain in the fouthern counties, the winter in thofe parts being later than in thofe of the north •, Mr Stillingfleet having obferved feveral wheat-ears in the ifle of Purbeck on the 18th of November. As thefe birds are incapable of very diftant flights, Spain, or the fouth of France, is probably their winter afy- lum. 14. Swallows and goatfucker. Every fpecies difap-. pears at the approach of winter. Water-Fowl. Of the vaft variety of water-fowl that frequent Water Great Britain, it is amazing to. reflect how few are fowl- known to breed here : the caufe that principally urges them to leave this country, feems to be not merely the w-ant of food, but the defire of a fecure retreat. Our country is too populous for birds fo fliy and timid as the bulk of thefe are : when great part of our ifland was a mere wafte, a tradt of woods and fen, doubt- lefs many fpecies of birds (which at this time mi¬ grate) remained in fecurity throughout the year.—. Egrets, a fpecies of heron now fcarcely known in this ifland, were in former times in prodigious plen¬ ty ; and the crane, that has totally forfaken this coun¬ try, bred familiarly in our marlhes : their place of incubation, as well as of all other cloven-footed wTa- ter-fowl (the heron excepted), being on the ground, and expofed to every one. As rural economy increafed in this country, thefe animals were more and more di- fturbed 5 at length, by a feries of alarms, they were ne- ceflitated to feek, during the fummer, fome lonely fafo habitation. On the contrary, thofe that build or lay in the al- mofl: inacceflible rocks that impend over the Britifli feas, breed there ftill in vatt numbers, having little to fear from the approach of mankind : the only difturb- ance they meet with in general being from the defpe- rate attempts of fome few to get their eggs. Clovix-footed Water-Fowl. 15. Herons. The white heron is an uncommon bird, and vifits us at uncertain feafons j the common kind and the bittern never leave us. 16. Curlews. The curlew breeds fometimes on our mountains : but, confidering the vaft flights that ap¬ pear in winter, it is probable that the greater part retire to other countries : the whimbrel breeds on the Grampian hills, in the neighbourhood of Invercauld. 17. Snipes. The woodcock breeds in the moift w7oods of Sweden, and other cold countries. Some fnipes breed here, but the greateil part retire elle- where : as do every other fpecies of this genus. 18. Sandpipers. The lapwing continues here the whole year: the ruff breeds here, but retires,in winter-; thfe I \ MIG [ 80 ] tile redfliank anti fandpiper breed in this country, and pole ' refide here. All the others abfent themfelves during fummer. 19. P/overs and oyster-catcher. 'Ihe long-legged plover and fanderlfng vifit us only in winter ; the dot¬ trel appears in fpring and in autumn } yet, what is very Angular, we do not find it breeds in South Britain. The oyller-catcher lives with us the whole year. 9 he Norfolk plover and fea-lark breed in England. I he green plover breeds on the mountains of the north of England, and on the Grampian hills. We muft here remark, that every Ipecies of the. ge¬ nera of curlews, woodcocks, fandpipeis, and plovers, that forfakes us in the fpring, retires to Sweden, Po¬ land, Pruflia, Norway, and Lapland, lo breed : as foon as the young can fly, they return to us again, ueoaufe the frofts which fet in early in thofe countries totally deprive them of the means of fubfifting 5 as the dry- nels'and hardnefs of the ground, in general, during our fummer, prevent them from penetrating the earth with their bills, in fearch of worms, which are the na¬ tural food of thefe birds. Mr Ekmark (peaks thus of the retreat of the whole tribe of cloven-footed water- fowl out of his country (Sweden) at the approach of winter; and Mr Klein gives much the fame account of thofe of Poland and Pruflia. 20. Rails and gallinules. Every fpecies ot thefe two genera continues with us the whole year j the land-rail excepted, which is not feen here in winter. It likewiie continues in Ireland only during the fummer months, when they are very numerous, as Mr Smith tebs us in the Hiftory of Waterford, p. 3*36. Great numbers ap¬ pear in Anglefea the latter end of May ; it is fuppoled that they pafs over from Ireland, the paflfage between the two iflands being but fmall. As we have inftances of thefe birds lighting on (hips in the Channel and the b|v of Bifcay, we may conjeflure their winter quar¬ ters to be in Spain. Finned-footed Water Birds. 21. Phalaropes. Vifit us but feldom •, their breeding place is Lapland, and other arfiic regions. 22. Grebes. The great creded grebe, the black and white grebe, and little grebe, breed with us, and never migrate •, the others vifit us accidentally, and breed in Lapland. Web-footed Birds. 23. Avcfet. Breed near Fofsdike in Lincolnfnire, but quit tlieir quarters in winter. They are then Ihot in different parts of the kingdom, which they vifit, not regularly, but accidentally. 24. Shds and guillemots. The great auk or pinguin fometimes breeds in St Kilda. The auk, the guillemot, and puffin, inhabit moft of the maritime cliffs of Great Britain, in amazing numbers, during fiunmer. The black guillemot breeds in the Bafs Hie, and in St Kilda, and fometimes in Llandidno rocks. We are at a lofs for the breeding place of the other fpecies \ neither can We be very certain of the winter reiidence of any of them, excepting of the leffer guillemot and black-billed auk, which, during winter, vifit in vaft flocks the frith of Forth. 25. Divers. Thefe chiefly breed in the lakes of Sweden and Lapland, and in fome countries near the 2 M I G r„_ 7 but fome of the red-throated divers, the northern Mr •ration, and the imber, may breed in the north of Scotland and its ifles. 26. Terns. Every fpecies breeds here 5 but leaves us in the winter. 27. Petrels. The fulmar breeds in the Hie of St Kilda, and continues there the whole year except Sep¬ tember and part of October : the Ihearwater vifits the Hie of Man in April ; breeds th|re ; and, leaving it in Auguft or the beginning of September, difperfes over all parts of the Atlantic ocean. The fformfinfch is feen at all difhnces from land on the fame vaft watery traft ; nor is ever found near the ihore except by fome very rare accident, unlefs in ths breeding feafon. Mr Pennant found it on fome little rocky ifles oif the north of Skye. It alfo breeds in St Kilda. He alfo fufpcifts that it neftles on the Blafquet ifles off Kerry, and that it is the gourder of Mr Smith. 28. Merganfers. This whole genus is mentioned among the birds that fill the Lapland lakes during fummer. Mr Pennant has feen the young of the red- breafted in the north of Scotland : a few of tnefe, and* perhaps of the goolanders, may breed there. 29. Ducks. Of the numerous.Ipecies that form this genus, we know of lew that breed nere : Fhe fvvan and goofe, the Afield duck, the eider cluck, a few fhovelers, garganics, and teals, and a very fmall portion ol the wild ducks. The reft contribute to form thai amazing multi¬ tude of water-fowl that annually repair from moft parts of Europe to the woods and lakes of Lapland and other ar&ic regions, there to perform the functions of incubation and nutrition in full fecurity. They and their young quit their retreat in September, and dii- perfe themfelves over Europe. With us they make their appearance the beginning oi October; circulate firft round our (bores ; and, when compelled by fevere froft, betake themfelves to our lakes and rivers. Of the web-footed fowl there are fome of hardier confti- tutions than others: thefe endure the ordinary winters of the more northern countries •, but when the cold reigns there with more than common rigour, they repair for flrelter to thefe kingdoms : this regulates the ap¬ pearance of fome of the diver kind, as ado of the wild fwans, the fwallow-tailed llfield duck, and the different lorts of goofanders which then vifit our coafts. Barents found the barnacles with their nefts in great numbers in Nova Zembla. (JColleEi. Voy. Dutch Kofi-India Com¬ pany, 8vo, 1703, p. 19.). Clufius, in his Exot. 368. alfo obferves, that the Dutch difeovered them on the rocks of that country and in Waygate ftraits. They, as well as the other fpecies of wild geefe, go very far north to breed, as appears from the hiftories of Green¬ land and Spitzbergen, by Egede and Crantz. 1 hefe birds feem to make Iceland a refting place, as Horre- bow obferves : few continue there to breed, but only vifit that ifland in the fpring, and after a fliort ftay retire ftill further north. 30. Corvorants. The corvorant and (hag breed on molt of our high rocks : the gannet in fome ol the Scotch ifles and on the epaft of Kerry : the two firft continue on our ftrores the whole year. I he gannet difperfes itfeif all round the Teas of Great Britain, in purfuit of the herring and pilchard, and even as iar as the 'Pa us to prey on the lardina. But MIG [ 81 ] MIG Migration. But of tire numerous fpecies of fowl here enumerat- 1 ed, it may be obferved how very few intruft them- Few breed ^e^ves t0 us *n ^ie breeding feafon, and what a diftant in this ' flight they make to perform the firfl: great didlate of country. nature. There feems to be fcarcely any but what we have traced to Lapland, a country of lakes, rivers, fwamps, * and alps, covered with thick and gloomy forefts, that afford flicker during fummer to thefe fowls, which in winter difperfe over the greateft part of Europe. In thofe ardlic regions, by reafon of the thicknefs of the woods, the ground remains moift and penetrable to the woodcocks, and other flender-billed fowl : and for the web-footed birds, the waters afford larvae innumerable of the tormenting gnat. The days there are long j and the beautiful meteorous nights indulge them with every opportunity of cclledling fo minute a food j wdiilft mankind is very fparingly fcattered over that vaft nor¬ thern wafte. Why then fliould Linnaeus, the great explorer of thefe rude deferts, be^ amazed at the myriads of water- fowl that migrated wdth him out of Lapland i* which exceeded in multitude the army of Xerxes ; covering, for eight whole days and nights, the furface of the river Calix ! His partial obfervation as a botaniit, would confine their food to the vegetable kingdom, almoft denied to the Lapland waters} inattentive to a more plenteous table of infedff food, which the all-bountiful Creator had fpread for them in the wildernefs. It may be remarked, that the lakes of mountainous rocky countries in general are deftitute of plants : few or none are feen on thofe of Switzerland ; and Linnaeus makes the fame obfervation in refpect to thofe of Lap- land ; having, during his whole tour, difcovered only a fingle fpecimen of a lemma trifu/ca, or “ ivy-leaved duck’s meat,” Flora Lap. Ne 470. *, a few of the fcir- pus lacujlris, or “ bullrufli,” N° 18.; the alopecurus geniculatus, or “ flcte foxtail-grafs,” N° 38. ; and the ranunculus aquatilis, N° 234. •, which are all he enu¬ merates in his Prolegomena to that excellent perform- ^ ance. Arguments We fliall afterwards flate the principal arguments for againft mi- and againft the migration of fwallows; but here we gration. fliall give a fliort abftrafl of the arguments ufed by the Hon. Daines Barrington againft the migration of birds in general, from a paper publiftied by him in the 62ft volume of the Philofophical Tranfa&ions. This gen¬ tleman denies that any well-attefted inftances can be produced of this fuppofed migration •, which, he thinks, if there were any fuch periodical flight, could not pofli- bly have efcaped the frequent obfervation of feamen. It has indeed been afferted that birds of paffage become invifibie in their flight, becaufe they rife too high in the air to be perceived, and becaufe they choofe the night for their paffage. The author, however, expref- fes his doubts u wrhether any bird was ever feen to rife to a greater height than perhaps twice that of St Paul’s crofs 5” and he further endeavours to (how, that the extent of fome of thefe fuppofed migrations (from the northern parts of Europe, for inftance, to the line) is too great to be accounted for, by having recourfe to the argument founded on a noflurnal paffage. The author next recites, in a chronological order, all the inftances that he has been able to colledl, of birds having been actually feen by mariners when they Vol. XIV. Part I. were crofling a large extent of fea $ and he endeavours Migration, to (how that no ftrefs can be laid on the few cafual v J obfervations of this kind that have been produced in fupport of the dodtrine of a regular and periodical mi¬ gration. Mr Barrington afterwards proceeds to invalidate M. Adanfon’s celebrated obfervation with refpedf to the migration of the fwTallow in particular, and which has been confidered by many as perfeftly decifive of the prefent queftion. He endeavours to (how that the four fwallows which that naturalift caught, on their fettling upon his (hip, on-the 6th of Odlober, at about the diftance of 50 leagues from the coaft of Senegal, and which he fuppofes to have been then proceeding from Europe to pafs the winter in Africa, could not be true European fwallows •, or, if they were, could not have been on their return from Europe to Africa. His objedtions are founded principally on fome proofs which die produces of M. Adanfon’s want of accuracy on this fubjedl, wdiich has led him, in the prefent in¬ ftance, to miftake two African fpecies of the fwallow tribe, deferibed and engraved by Briffon, for Euro¬ pean fwallows, to which they bear a general refem- blance 5 or granting even that they were European fwallows, he contends that they were flitting from the Cape de Verd iflands to the coaft of Africa ; “ to which fhort flight, however, they were unequal, and accord- * Natural ingly fell into the failors hands.”—We fliall here only °f add, in oppofition to the remarks of Mr Barrington, the following obfervations of the Rev. Mr White * in p, i ^* a letter to Mr Pennant on this fubjeef. 6 “We muft not (fays he) deny migration in gene-A1#111116013 ral; becaufe migration certainly does fubfift in fome "^upport places, as my brother in Andalufia has fully informed0 U' me. Of the motions of thefe birds he has ocular de- monftration, for many weeks together, both fpring and fall : during wkich periods myriads of the (wallow kind traverfe the Straits from north to fouth, and from fouth to north, according to the feafon. And thefe vaft migrations confift not only of hirundines, but of bee-birds, hoopoes, oro pendolos, or golden thrulhes, &.c. &c. and alfo of many of our foft-billed fummer birds of paffage ; and moreover of birds which never leave us, fuch as all the various forts of hawks and kites. Old Belon, 200 years ago, gives a curious account of the incredible armies of hawdts and kites which he faw in the fpring time traverfing the Thra¬ cian Bofphorus from Afia to Europe. Befides the above mentioned, he remarks that the proceflion is fw'elled by whole troops of eagles and vultures. “ Now it is no wonder that birds refiding in Africa (hould retreat before the fun as it advances, and retire to milder regions, and efpecially birds of prey, whofe blood being heated with hot animal food, are more im¬ patient of a fultry climate : but then I cannot help won¬ dering why kites and hawks, and fuch hardy birds as are known to defy all the feverity of England, and even of Sweden and all northern Europe, fliould want to mi¬ grate from the fouth of Europe, and be diffatisfied with the winters of Andalufia. “ It does not appear to me that much ftrefs may be laid on the difficulty and hazard that birds muft run in their migrations, by reafon of vaft oceans, crofs winds, &c. *, becaufe, if we reflect, a bird may travel from England to the equator without launching out and ex- L poling MIG [ 8: Migration, pofing itfelf to boundlefs feas, and that by eroding the ' ' 'v 1 ' water at Dover and again at Gibraltar. And I with the more confidence advance this obvious remark, be- caufe my brother has always found that /ome of his birds, and particularly the (Wallow kind, are very (pa¬ ring of their pains in eroding the Mediterranean : for when arrived at Gibraltar, they do not, “ rang’d in figure, wedge their way, “ and fet forth j M l G “ Their airy caravan high over feas * “ Flying, and over lands wdth mutual wing “ Eafing their flight.” Milton. but fcout and hurry along in little detached parties of fix or (even in a company 5 and fweeping low, juft over the furface of the land and water, diretft their courfe to the oppofite continent at the narroweft paffage they, can find. They ufually dope acrofs the bay to the fouth- weft, and fo pafs over oppofite to Tangier, which it feems is the narroweft (pace. “ In former letters wre have confidered whether it was probable that woodcocks in moon^fhiny nights crofs the German ocean from Scandinavia. As a proof that birds of lefs (peed may pafs that fea, confiderable as it is, I fhall relate the following incident, which, though mentioned to have happened (0 many years ago, was ftriflly matter of faff:-—As fome people were (hooting in the parifti of Trotton, in the county of Suffex, they killed a duck in that dreadlul winter 1708-9, with a filver collar about its neck (I have read a like anecdote of a fwTan), on which wrere en¬ graven the arms of the king of Denmark. This anec¬ dote the reftor of Trotton at that time has often told to a near relation of mine j and, to the beft of my re¬ membrance, the collar wras in the poffeffion of the rec¬ tor. “ At prefent I do not know any body near the fea fide that will take the trouble to remark at what time of the moon woodcocks firft come. One thing I ufed to obferve when I was a fportfman, that there were times in which wmodcocks wTere fo fluggiftr and fleepy that they would drop again when flulhed juft before the fpaniels, nay juft at the muzzle of a gun that had been fired at them : whether this ftrange lazinefs was the eft'eft of a recent fatiguing journey, I ftiall not prefume to fay. “ Nightingales not only never reach Northumber¬ land and Scotland, but alfo, as I have been always told, Devonfliire a,nd Cornwall. In thofe two laft counties we cannot attribute the failure of them to the want of warmth : the defeft in the weft is rather a prefumptive argument that thefe birds come over to us from the continent at the narrovveft pallage, and do not ftroll fo ^ far weftward.” Queftion, Upon the fubjedft of the migration of the fwallow What be- there are three opinions. Some fay that it migrates to comes of a warrner climate ; fome, that it retires to hollow trees winter? anc‘ caverns? where it lies in a torpid ftate 5 and others have affirmed, that it lies in the fame ftate in the bot¬ tom of lakes and under the ice. The firft opinion is fupported by Marfigli, Ray, Willoughby, Catefby, Reaumur, Adanfon, Buffon, &c. The firft and fecond opinion are both adopted by Pennant and White. The third is faneftioned by Schaeffer, Hevelius, Derham, Klein, Ellis, Linnaeus, Kalm : and the fecond and third have been ftrongly defended by'the honourable Migratio*. DaineS Barrington. v' ~-f Though we cannot help giving a preference to that opinion which appears the rnoft probable*, yet we do not think that any7 one of them is eftablifhed upon fuch evi¬ dence as fo curious a fubje£t requires, and as the advan¬ ced ftate of natural hittory would lead us to expedl. We fhall therefore ftate the arguments upon which each opinion is founded as fairly and diftindlly as we can, and as often as poffible in the very words of their re- fpeftive advocates. By doing fo, we (hall place the whole fubjeft before the eyes of our readers, who will thus have an opportunity of examining it attentively, and of making fuch obfervations and experiments as may lead to the truth. 8 Thofe who affert that the fwallow migrates to a war- op1- mer country in winter, argue in this manner: That ^tec‘* many birds migrate, is a fa eft fully proved by the obfer- mi orate to vations of natural hiftorians. Is it not more probable, warm cli-- therefore, that (wallows, which difappear regularly mates, every feafon, retire to fome other country, than that they lie in a ftate of torpor in caverns or lakes ? But this opinion does not reft on probability, it is founded on fa<5ls. We often fee them collected in great flocks 911 chur¬ ches, rocks, and trees, about the time when they an¬ nually difappear. The diredftion of their flight has been obferved to be fouthward. Mr White, the ingenious Natural hiftorian of Selborne, travelling near the coaft of the Hiftory *' Britifli Channel one morning early, faw a flock of j/?K> (wallows take their departure. At the beginning of his jsurney he was environed with a thick fog -, but on a large wild heath the mift began to break, and difeover- ed to him numberlefs (wallows, cluftered on the (land¬ ing bullies, as if they had roofted there : as foon as the fun burft out, they were inftantly on wing, and with an eafy and placid flight proceeded towards the fea. After ' this he faw no more flocks, only now7 and then a ftraggler. Mr Lafkey of Exeter obferved attentively the direc¬ tion which a flock of fwallows took in the autumn of 1793. On the 22d of Sept, about feven o’clock in the morning, the wind being eafterly, accompanied with a cold drizzling rain, Mr Lafkey’s houfe was entirely covered with houfe-fwallovvs. At intervals large flocks arrived and joined the main body, and at their ar¬ rival an unufual chirping commenced. The appear¬ ance of the whole company was fo lethargic, that he found it an eafy matter to catch a confiderable number Gent. Mag. of them, which-he kept in a room all that day. By/or 1796. heating the room they all revived : he opened four of them, and found their ftomachs quite full. The main body occupied the houfe top all day, except for two hours. About half an hour after nine in the morning of the 23d, there was a great commotion, with very loud chirping, and within a few minutes after, the whole multitude took their flight, in a diredl fouth-eaft direflion, having afeended to a great height in the at- mofpherei He let go the birds which he had caught, at certain intervals till four o’clock, and they all flew toward the fame quarter. Not only has the direftion of their flight been obfer¬ ved, but they have alfo been found on their paffage at a great diftance from land. Mr Adanfon informs us, that about 50 leagues from the coaft of Senegal four fwallows fettled upon the (hip on the 6th of Oflober j that 1 MIG [ 83 ] M I G Migration Phildfophi- ■cal Tranf- actions, voi. liii. Kahn's Voyage, vol. i. p. 24. Second opi¬ nion, that feme he in caverns in a torpid ftate. Pennant's Briti/h Zoology, vol. ii. p. 250. ■ that thefe birds rvere taken j and that he knew them to *e European fwallows, which, he conje£tures, were returning to the coaft of Africa. Sir Charles Wager’s authority may alfo be appealed to : “ Returning home (fays he) in the fpring of the year, as I came into foundings in our channel, a great flock of fwallows came and fettled on all my rigging \ every rope was covered, they hung on one another like a fwarm of bees; the decks and carving were filled with them. They feemed almofi: famifhed and fpent, and were only feathers and bones •, but, being recruited with a night’s reft, took their flight in the morning.” This vaft fa¬ tigue proves that their journey muft have been very great, confidering the amazing fwiftnefs of thefe birds : in all probability they had croffed the Atlantic ocean, and were returning from the {bores of Senegal, or other parts of A.friqa $ fo that this account from that moft able and honeft feaman, confirms the later information of Mr Adanfon. Mr Kalm, who is an advocate for the opinion that fwallows lie immerfed in lakes during wdnter, acknow¬ ledges that in crofling the Atlantic from Europe a frvallow lighted on the fliip on the 2d September, when it had paffed only two-thirds of the ocean. Since, therefore, fwallows have been feen affembled in great flocks in autumn flying off in company towards fouthern climes, fincethey have been found both in their paffage from Europe and returning again, can there be any doubt of their annual migration ?—Mr Barrington’s objections to this opinion have been noticed above in N° 5. The fecond notion (fays Mr Pennant) has great anti¬ quity on its fide. Ariilotle and Pliny give it as their belief, that fwallows do not remove very far from their fummer habitation, but winter in the hollows of rocks, and during that time lofe their feathers. The former part of their opinion has been adopted by feveral inge¬ nious men ; and of late feveral proofs have been brought of fome fpecies, at leaft, having been difcovered in a torpid ftate. Mr Collinfon favoured us with the evi¬ dence of three gentlemen, eye-wdtneffes to numbers of fand martins being drawn out of a cliff on the Rhine, in the month of March 1762. And the honourable iDaines Barrington communicated to us the following fad, on the authority of Lord Belhaven, That numbers of fwallows have been found in old dry walls and in fand-hills near his Lordfhip’s feat in Eaft Lothian ; not once only, but from year to year 5 and that when they were expofed to the warmth of a fire, they revived. We have alfo heard of the fame annual difcoveries near Morpeth in Northumberland, but cannot fpeak of them with the fame affurance as the two former : neither in the two laft inftances are we certain of the particular fpecies. “ Other witneffes crowd on us to prove the refidence of thofe birds in a torpid ftate during the fevere feafon. Firft, In the chalky cliffs of Suffex j as was feen on the fall of a great fragment fome years ago. Secondly, In a decayed hollow tree that was cut down, near Dolgel- li, in Merionethlhire. Thirdly, In a cliff near Whitby, Yorklhire; w'here, on digging out a fox, whole buftiels of fwallows were found in a torpid condition. And, laftly, The reverend Mr Conway of Sychton, Flint- fhire, was fo obliging as to communicate the following fa£t: A few years ago, on looking down an old lead- mine in that county, he obferved numbers of fwallows Migration, clinging to the timbers of the fhaft, feemingly afleep 5 v and on flinging fome gravel on them, they juft moved, but never attempted to fly or change their place : this was between All Saints and Chriftmas. “ Thefe are doubtlefs the lurking places of the later hatches, or of thofe young birds which are incapable of diftant migrations. There they continue infenfible and rigid ; but like flies may fometimes be reanimated by an unfeafonable hot day in the midft of winter : for very near Chriftmas a fewT appeared on the moulding of a window of Merton college, Oxford, in a remarkably warm nook, which prematurely fet their blood in mo¬ tion, having the fame effect as laying them before a fire at the fame time of year. Others have been known to make this premature appearance 5 but as foon as the cold natural to the feafon returns, they withdraw again to their former retreats. “ The above are circumftances w7e cannot but affent to. though feemingly contradictory to the common courfe of nature in regard to other birds. We muft, therefore, divide our belief relating to thefe turo fo different opi¬ nions ; and conclude, that one part of the fwallow tribe migrate, and that others have their winter quarters near home. If it fliould be demanded, why fwallows alone are found in a torpid ftate, and not the other many fpecies of {oft-billed birds, which likewife dif- appear about the fame time ? reafons might be affign- ed.” i being a little boy, I faw feveral fwallows brought in winter by the fifhermen from the river Vidula to my father’s houfe ; where two of them were brought into a warm room, revived, and flew about. I faw them feveral times fettling on the warm dove (which the northern nations have in their rooms) ; and I recolleft well, that the fame forenoon they died, and I had them, when dead, in my hand. In the year 1754, after the death of my uncle Godefroy Wolf, captain in the Polifh regiment of foot guards, being myfelf one of his heirs, I adminidered for my co-heirs feveral edates called the Starq/ly of Difchau, in Polifh Pruffia, which my late uncle fanned under the king. In January, the lake of Lybdiaw, belonging to thefe edates, being covered with ice, I ordered the fifhermen to fifh therein, and in my prefence feveral fwallows were taken, which the fidrermen threw in again ; but ene I took up myfelf, brought it home, which was five miles from thence, and it revived, but died about an Migmiojj, hour after its reviving. '——y—* “ Thefe are fails atteded by people of the highefl: quality, by fome in public offices, and by others w'ho, though of a low rank, however, made thefe affidavits upon oath. It is impoffible to fuppofe indifcriminately that they were prompted, by views of intered, to aifert as a fait a thing which had no truth in it. It is there* fore highly -probable, or rather inconteftably true, that fwallows retire in the northern countries, during winter, into the water, and day there in a torpid date till the return of warmth revives them again in fming. The quedion therefore, I believe, ought for the future to be thus dated : The fwallows in Spain, Italy, France, and perhaps fome from England, remove to warmer climates; fome Englifh ones, and fome in Germany and other mild countries, retire into clefts and holes in rocks, and remain there in a torpid date. In the col¬ der northern countries the fwallows immerfe in the fea, in lakes, and rivers; and remain in a torpid date, under ice, during winter. There are dill fome objec¬ tions to this latter affertion, which we mud remove. It is faid, Why do not rapacious fifh, and aquatic qua¬ drupeds and birds, devour thefe fwallows ? The anfwer is obvious, fwallows choofe only fuch places in the wTater for their wunter retreat as are near reeds and rudies; fo that finking down there between them and their roots, they are by them fecured againd the rapa- cioufnefs of their enemies. But others objedf, Why are not thefe birds caught in fuch frefh waters as are conti¬ nually haraffed by nets ? I believe the fame anfwer which has been made to the fird objection will ferve for this likewife. Fifhermen take care to keep off with their nets from places filled with reeds and rufhes, for fear of entangling and tearing their net •, and thus the fituatlon of fwallows under water, is the reafon that they are feldom didurbed in their filent winter retreats. What confirms this opinion dill more is, that fwallows were never caught in Pruffia according to the above- mentioned affidavits, but with thofe parts of the net which pafled near to the reeds and ruffies; and fome- times the fwallows were yet fadened with their feet to a reed, -when they were drawn up by the net. As to tile argument taken from their being fo long under water without corruption, I believe there is a real difference between animals fuffocated in water and ani¬ mals being torpid therein. We have examples of things being a long time under wTater ; to which w7e may add the intenfe cold of thefe northern regions, which preferves them. Who would have thought that fnails and polypes might be diflefted, and could repro¬ duce the parts fevered from their bodies, if it was not a fadil ? Natural hidory ought to be dudied as a collec¬ tion of fafts, not as the hidory of our guelfes or opi¬ nions. Nature varies in an infinite manner ; and Pro¬ vidence has diverfified the inflindl of animals and their economy, and adapted it to the various feafons and climates.” ir With Mr Kalm’s concluding obfervations we hearti- This que- ly concur. Natural hidory ought to be dudied as a ^I01’ 0US^lt colledlion of fafts ; and it was from this very notion that we have dated the above-mentioned opinions fonotbyrea- fully, and brought together the fafts which the bed foning, but advocates for each opinion have judged mod proper for^y expen.. fupporting ment* M 1 G [ 85 ] M I G Migraticr.fupportlng them. We are fenfible of the great impro- -—v—— bability of the third opinion, and know that many ar¬ guments have been ufed to prove its abfurdity : fuch as thefe, The fwallow is lighter than water, and therefore cannot fink ; if it moults at all, it muft moult under water during its torpid ftate, which is very improbable^ there is no inftance of land animals living fo long un¬ der water without refpiration. Many other arguments of the fame fort have been advanced, and certainly af¬ ford a fhort way of deciding the queftion j but unlefs they were fuflicient to prove the immerfion of fwallows a phyfical impoffibility, they are of no force when op- pofed to the evidence of teftimony, if there be no caufe to fufpefl the witneffes of inaccuracy or defign. The true way to refute fuch an opinion is by accurate obfervation and experiment. We have not heard of any accurate inquiries being made by philofophers in thofe northern countries where fwallows are faid to pafs the winter under water. The count de Buffan, indeed, fhut up fome fwallows in an ice houfe by way of experi¬ ment, which died in a few days ; but as he does not tell us what precautions he took to make the experi¬ ment fucceed, it is not entitled to any attention. Mr John Hunter made a very judicious experi¬ ment on the banks of the Thames, which is defcrib- ed by a correfpondent in the Gentleman’s Maga¬ zine, who afferts that he had it from Mr Hunter him- felf. One year in the month of September, he prepared a room, with every accommodation and convenience which he could conti ive, to ferve as a dormitory for fwallows, if they were difpofed to fieep in winter. He placed in the centre a large tub of water with twigs and reeds, &c. which reached to the bottom. In the corners of the room he contrived artificial caverns and holes, into which they might retire ; and he laid on the door, or fufpended in the air, different lengths of old wooden pipes, which had formerly been employed in conveying water through the fireets, &c. When the receptacle was rendered as complete as poffible, he then engaged fome watermen to take by night a large quantity of the fwallows that hang upon the reeds in the Thames about the time of their depar¬ ture. They brought him, in a hamper, a confiderable number ; and had fo nicely hit the time of their cap¬ ture, that on the very day following there were none to be feen. He put the fwallows into the room fo prepared, where they continued to fly about, and occafionally perch on the twigs, &c. But not one ever retired in¬ to the ivater, the caverns, holes, or wooden pipes, or fliewed the lead; difpofition to grow toroid, &.c. In this fituation he let them remain till they all died but one. This appearing to retain fome vigour, was fet at at liberty ; when it mounted out of fight, and flew a- way. All the birds lay dead fcattered about the room ; but not one was found afleep or torpid, or had, if the correfpondent remembers, fo much as crept into any of the receptacles he had fo provided. This experiment wTas ingenious, and certainly does render the do£lrine of immerfion much more improba¬ ble ; but it is not decifive •, for it may ftill be urged by the advocates for that dodflrine, as Mr Kalm has done, that it may only be in the colder countries where fwallows retire into the water. We formerly faid that Gentle¬ man's Ma¬ gazine, May 1796. 12 Mr Hun¬ ter’s expe¬ riment in¬ genious; 13 but net decifive with r@- fpeft to northern climates. none of the three opinions is fupported by fuch evi-Migration, dence as to fatisfy the mind completely. Opinions - ‘ refpefling events which happen every year ought to be confirmed by a great number of obfervations, and not by a few inftances divefted of almofl: all their con¬ comitant circumftances. Can no better proofs be brought to prove the migration of fwallows than thofe of Adanfon and Sir Charles Wager, or the circumflan- ces mentioned by Mr White and Mr Lafkey refpecling their difappearing ? We ought not merely to know that fome fwallows have taken a foutherly flight in autumn, that fome have been found at a great di(lance from land in the fpring, or in harveft *, but we ought to know to what countries they aflually retire. Before wre can reft fatisfied, too, that it is a general fact that fwallaws remain in a torpid ftate during winter, either' in ca¬ verns or in the bottom of lakes, &c. wre muft have more proofs j we muft know what fpecies of (wallows they are faid to be, in what countries this event takes place, and feveral other circumftances of the fame kind. ... . x4 We cannot help being of opinion that much remains Many to be done in order properly to afcertain what becomes t^ings yet of the fwallows in Europe during winter. It would be neceffary, in the firft place, to know accurately what0rderto are the countries in which fwallows are found. 2. Do determine they remain vifible the whole year? or, if they difap-d1'5 pear, at what feafon does this happen, and when do they appear again ? 3. Do they ever appear while a ftrong north wind blows, or do they only come in great numbers with a fouth wind ? We will endeavour to anfwer fome of thefe queftions in part ; but muft re¬ gret, that all the information on this fubjeft which we have been able to cull from the beft writers in natural hiftory is very fcanty; and we merely give it by way of fpecimen, hoping that future obfervations will render it more complete. 15 There are five fpecies which vifit Britain during the ^ ^cw irn“ fummer months; the common or chimney fwallow, the ftatedi martin, fand martin, fwift, and goat-fucker. 1. The chimney fwallow frequents almoft every part of the old continent ; being known (fays Dr Latham) from Norway to the Cape of Good Hope on the one fide, and from Kamtfchatka to India and Japan on the other. It is alfo found in all parts of North America, and in feveral of the Weft Indian ifiands. In Europe it dif- appears during the winter months. It appears general¬ ly a little after the vernal equinox ; but rather earlier in the fouthern, and later in the northern latitudes. It adheres to the ufual feafons with much regularity; forr though the months of February and March fhould be uncommonly mild, and April and May remarkably cold, it never deviates from its ordinary time. In the cold fpring of 1740 iome appeared in France before the infers on which they feed had become numerous enough to fupport them, and great numbers died f. t In the mild and even warm fpring of 1774 they ap- ^aturai peared no earlier than ufual. They remain in fome j^°i7 warm countries the whole year. Kolben affures usvol. vl. that thi-s is the cafe at the Cape of Good Hope ; but P- 5*27, . (he fiys) they are more numerous in winter. Some birds of this ipecies live, during winter, even in Eu¬ rope ; for example, on the coaft of Genoa, where they fpend the night in. the open coqptry on the orange Ihrubs, 2. The '-jyUsratlcn', MIG [ 2. The martins are alfo widely diffufed through the - oijj continent 5 but the countries where they refide or vifit have not been marked by naturalifls with much attention, 3. The fand martins are found in every part f Hid. 537.01' Europe, and frequently fpend the winter in Malta J. 1 wo birds of this fpecies were feen in Perigord in France, on the syth December 1775, when there was H Ibid. 454.3 foutherly wdnd, attended wdth a little rain |j. 4. The fvjft vifits the whole continent of Europe j has alfo been obferved at the Cape of Good Hope, and in Ca¬ rolina in jNorth America. 5. Hht go at-fuckers are not very common birds, yet are widely fcattered. They are found in every country between Sweden and Afri¬ ca : they are found alfo in India. In April the fouth- wefl: wind brings them to Malta, and in autumn they repafs in great numbers. thnfof the ^•ar^w^c^ Catsfield, near Battle in Suffex, Linnian ^las drawn up an accurate table, exprefling the day of Societyt the month on which the birds, commonly called migra- vol. i. torij, appeared in fpring, and difappeared in autumn, for 16 years, from 1768 to 1783 inclufive. The ob- fervations w^ere made at Catsfield. From this table we ft all extraft the dates for five years, and add the very few obfervations which we have been able to colledl ref- pedting the time when the fwailow appears and difap- pears in other countries. Chimney Swrallow Martins Sand Martin Swift Chimney Swallow Martins Sand Martin Swift Chimney Swallow Martins Sand Martin Swift Chimney Swallow- Martins Sand Martin Swift Chimney Swallow Martins Sand Martin Swift Firf fcen. 1779. April 14. 14- May 7. 9- 1780. April 29. 8. May 6. 1781. April 8. May 12. April 26. May 12. 1782. April 22. 26. May 15. 18. 1783- April 13. May 1. July 25. May 13. Laf feen. Odlober 29. I5- November 3. 3- September 8. 8. Odlober 15. September 7. September 1. September 1. November 2. Augult 28. 28. November 6. 6. September 1. November 6. f Buffon, ibid. I White's Natural Hijiory of Selborne, | Buff on, ibid. Chim. Swal. In Burgundy f In Selborne, Hamplhire t Ap. 4. In South Zele, Devonfhire f 25. In Blackburn, LancafUire f 29.- In Upfal in Sweden 5 Swifts. Martins. Appear about Ap. 9. Ap. 24. May 1. Ap. 28. Ap. 30. May 15. May 9. S. Mart. Ap. iz. Were tables of the fame kind made in every different country, particularly within the torrid zone, it would be eafy to determine the queftion which we have been confidering. To a.any, perhaps, it may not appear a matter of fuch importance as to be worth the labour. 3 86 ] . MIG We acknowledge it to be rather a curious than an im- Migration, portant inquiry j. yet it is one which muff be highly Miguel, gratifying to every mind that can admire the wifdom v "J of the Great Architedl of nature. The inftindl of the fwailow is indeed wonderful : it appears among us juft at the time when infects become numerous j and it con¬ tinues witn us during the hot weather, in order to pre¬ vent them from multiplying too much. It difappears when thefe infedts are no longer troublefome. It is ne¬ ver found in folitude ; it is the friend of man, and al¬ ways takes up its refidence with us, that it may protedt our houfes and our ftreets from being annoyed with fwarms of flies. ' Migration of Fijhes. See Ci.upea. St MIGUEL, one of the Azore iflands, fituated . in W. Long. 22. 45. N. Lat. 38. 10. This ifland appears to be entirely volcanic. The belt account we have of it hath been publiflied in the 68th volume of the Philofophical Tranfadtions by Mr Francis Maffon. According to him, the produdtions differ greatly from thofe of Madeira, infomuch that none of the trees of the latter are found here, except the faya : it has a nearer affinity to Europe than Africa. The mountains are covered with the erica vulgaris, and an elegant evergreen Ihrub very like a phillyrea, which gives them a moft beautiful appearance. It is one of the principal and moft fertile of the Azorian iflands, lying nearly eaft and weft. Its length is about 18 or 20 leagues ; its breadth unequal, not exceeding five leagues, and in fome places not more than two. It contains about 80,000 inhabitants. Its capital, the city of Ponta del Guda, which con¬ tains about 12,000 inhabitants, is fituated on the fouth fide of the illand, on a fine fertile plain country, pretty regularly built ; the ftreets ftraight, and of a good breadth. It is ftp plied with good water, which is brought about the diftance of three leagues from the neighbouring mountains. The churches and other religious edifices are elegant and well built for ftch an illand. There is a large convent of Francifcan friars and one of the order of St Auguftine, four convents for profeffed nuns, and three Ricolhimentos for young women and widows who are not profeffed. The veL fels anchor in an open road ^ but it is not dangerous, as no wind can prevent their going to fea in cafe of ftormy weather. The country round the city is plain for feveral miles, well cultivated, and laid out with good tafte in¬ to fpacious fields, which are fown with wheat, barley, Indian corn, pulfe, &c. and commonly produce an¬ nually two crops 5 for as foon as one is taken off, an¬ other is immediately fown in its place. The foil is remarkably gentle and eafy to work, being for the moft part computed of pulverized pumice ftone. There are in the plains a number of pleafant country feats, with orchards of orange trees, which are efteemed the belt in Europe. The fecond town is Ribeira Grande, fituated on the north fide of the ifland, containing about as many inha¬ bitants as the city j a large convent of Francifcan friars, and one of nuns. It gives title to a count, called the Conde Ribeira Grande,, who firft inftituted linen and woollen mamafadtories in the ifland. The third town is Villa Franca, on the fouth fide of the illand, about fix leagues eaft of Ponta del Guda. It M I G [ 87 ] MIG Miguel- It lias a convent of Francifcan friars and one of nuns, which contains about 300. Here, about half a mile from the Ihore, lies a fmall illand (Ilhao), which is hollow in the middle, and contains a fine bafon v/ith only one entrance into it, fit to hold 50 fail of velTels fecure from all weather ; at prefent it wants cleaning out, as the winter rain waflies down great quantities of earth into it, which has greatly diminilhed its depth. But velfels frequently anchor between this illand and the main. Befides thefe towns are feveral fmaller, viz. Alagao, Agoa de Pao, Brelanha, Fanaes de Ajuda, and a num¬ ber of hamlets, called lugars or places. About four leagues horth-eaft from Villa Franca, lies a place called the Furnas, being a round deep valley in the middle of the eaft part of the ifland, furrounded with high mountains, which, though fteep, may be eafily afcended on horfeback by two roads. The valley is about five or’fix leagues in circuit. The face of the mountains, which are very fteep, is entirely co¬ vered with beautiful evergreens, viz. myrtles, laurels, a large fpecies of bilberry called mia de ferra &c. and numberlefs rivulets of the pureft water run down their fides. The valley below is well cultivated, producing wheat, Indian corn, flax, &c. The fields are planted round with a beautiful fort of poplars, which grow into pyramidal forms, and by their carelefs irregular difpofi- tion, together with the multitude of rivulets, which run in all direflions through the valley, a number of boil¬ ing fountains throwing up clouds of fleam, a fine lake in the fouth-weft part about two leagues round, compofe a profped the fineft that can be imagined. In the .bot¬ tom of the valley the roads are fmooth and eafy, there being no rocks, a fine pulverized pumice ftone that the earth is compofed of. There are numerous hot fountains in different parts of the valley, and alfo on the fides of the moun¬ tains : but the moft remarkable is that called the clml- deira, fituated in the eaftern part of the valley, on a fmall eminence by the fide of a river, on which is a bafon about 30 feet diameter, where the water conti¬ nually boils with prodigious fury. A few yards di- ftant from it is a cavern in the fide of the bank, in which the water boils in a dreadful manner, throwing out a thick, muddy, un&uous water, feveral yards from its mouth with a hideous noife. In the middle of the river are feveral places wdrere the water boils up fo hot, that a perfon cannot dip his finger into it without being fcalded ; alfo along its banks are f&veral apertures, out of which the fleam rifes to a confiderable height, fo hot that there is no approaching it with one’s hand : in other places, a perfon would think that 100 fmiths bellows were blowing altogether, and fulphureous fleams iffuing out in thoufands of places ; fo that na¬ tive fulphur is found in every chink, and the ground covered with it like hoar froft ; even the bullies that happen to lie near thefe places are covered with pure brimftone, condenfing from the fleam that iffues out of the ground, which in many places is covered over with a fubftance like burnt alum. In thefe fmall ca¬ verns, from which the fleam iffues, the people often boil their yams. Near thefe boiling fountains are feveral mineral fprings j two in particular, whofe waters have a very flrong quality, of an acid tafte, and bitter to the Miguel, tongue. —y—*, About half a mile to the weftward, and clofe by the river fide, are feveral hot fprings, which are ufed by fick people with great fuccefs. Alfo, on the fide of a hill weft of St Anne’s church, are many others, with three bathing houfes, which are moft commonly ufed. Thefe waters are very warm, although not boiling hot; but al the fame place iffue feveral ftreams of cold mine¬ ral water, by which they are tempered, according to every one’s liking. About a mile fouth of this place, and over a low ridge of hills, lies a fine lake about two leagues in cir¬ cumference, and very deep, the wrnter thick, and of a greenifh colour. At the north end is a plain piece of ground, where the fulphureous fleams iffue out in many places, attended with a furprifing blowing noife. Our author could obferve ftrong fprings in the lake, but could not determine whether they were hot or cold: this lake feems to have no vifible evacuation. The other fprings immediately form a confiderable river, called Ribeira d^iiente, which runs a courfe about two or three leagues, through a deep rent in the mountains, on each fide of which are feveral places w'here the fmoke iffues out. It difcharges itfelf into the fea on the fouth fide, near which are fome places where the water boils up at fome diftance in the fea. This wonderful place had been taken little notice of until very lately : fo little curiofity had the gentle¬ men of the ifland, that fcarcely any of them had feen it, until of late fome perfons, afflifted with very viru¬ lent diforders, were perfuaded to try its waters, and found immediate relief from them. Since that time it has become more and more frequented ; feveral per¬ fons who had loft the ufe of their limbs by the dead palfy have been cured $ and alfo others who were troubled vvith eruptions on their bodies. A clergyman, who w'as greatly afflifled with the gout, tried the faid waters, and was in a fhort time per- feflly cured, and has had no return of it fince. When Mr Maffon was there, feveral old gentlemen, who w'ere quite worn out with the faid diforder, were ufing the waters, and had received incredible benefit from them; in particular, an old gentleman about 60 years of age, who had been tormented with that diforder more than 20 years, and often confined to his bed for fix months together : he had ufed theie w’aters for about three wTeeks, had quite recovered the ufe of his limbs, and walked about in the greateft fpirits imaginable. A friar alfo who had been troubled with the faid diforder about 1 2 years, and reduced to a cripple, by ufing them a fhort time was quite well, and went a-hunting every¬ day. There are feveral other hot fprings in the ifland, particularly at Ribeira Grande ; but they do not pof- fefs the fame virtues, at leaft not in fo great a de- gree. The eaft and weft part of the ifland rifes into high mountains ; but the middle is lorv, interfperfed with round conic hills, all of which have very recent marks of fire ; all the parts below7 the furface confifting of melted lava lying very hollow. Moft of the mountains to the weftwTard have their tops hollowed out like a punch bowd, and contain wa¬ ter. ' MIG [ 88 ] MIG ter. Near the weft end is an immenfe deep valley like the Furnas, called the Sete Cidades. This valley is furrounded with very abrupt mountains, about feven or eight leagues round ; in the bottom is a deep lake of water about three leagues in circuit, furnifhed with great numbers of water fowls. This water has no mineral quality ; neither are there any hot fprings in the valley. AH thefe mountains are compofed ©f a white crumbly pumice ftone, which is fo loofe, that if a perfon thruft a flick into the banks, whole wag¬ gon loads of it wall tumble dowTn. The inhabitants of the ifland relate a ftory, that he who firft difcovered it obferved an extraordinary high peak near the weft end 5 but the fecond time he vifited it, no fuch peak was to be feen, which he fuppofed muft have certainly funk ; but, however improbable this ftory may be, at fome period or other it muft have certainly been the cafe. MILAN, or the duchy of the Milanefe, a coun¬ try of Italy, bounded on the weft by Savoy, Pied¬ mont, and Montferrat •, by Switzerland on the north ; by the territories of Venice, the duchies of Mantua, Parma, and Placentia, on the eaft ; and by the ter¬ ritories of Genoa on the fouth. It is 150 miles long, and 78 broad. Anciently this duchy, containing the north part of the old Liguria, was called Infubria, from its inhabitants the Infubres; who were conqeered by the Romans, as thefe were by the Goths j who in their turn were fubdued by the Lombards. Di- dier, the laft king of the Lombards, was taken prifoner by Charlemagne, who put an end to the Longobardic empire, and appeinted governors of Milan. Thefe go¬ vernors, being at a diftance from their mafters, foon began to a flu me an independency, which brought a dreadful calamity on the country j for, in 1152, the capital itfelf was levelled with the ground by the em¬ peror Frederic Barbaroffa, w'ho committed great de- vaftations otherwife throughout the duchy. Under this emperor lived one Galvian, a nobleman who was defcended from Otho a Milanefe. Galvian, along with William prince of Montferrat, ferved in the crufade, when Godfrey of Boulogne took Jerufalem : he killed in Angle combat the Saracen general, whom he ftripped of his helmet, which was adorned with the image of a ferpent fwallowing a youth 5 and this ever afterwards was the badge of that family. His grand- fon Galvian, having oppofed the emperor, was taken prifoner, and carried in irons into Germany, from whence he made his efcape, and returning to Milan, died in the fervice of his country. From him defcend¬ ed another Otho, at the time that Otho IV. was em¬ peror of Germany, and who foon diftinguilhed him- felf by the accompliftiments both of his mind and bo¬ dy. When he grew up, he was received into the family of Cardinal Oclavian Ubaldini at Rome. This prelate, who was himfelf afpiring at the popedom, was in a fticrt time greatly taken with the addrefs and acccmpliftiments of young Otho, and predided his future greatnefs. In the mean time, one Torrefs, or Torriano, a Milanefe nobleman of unbounded ambi¬ tion, was attempting to make himfelf mailer of Mi¬ lan. The popular fadlion had fome time before been caballing again!! the nobility 5 and at laft, Torriano, putting himfelf at their head, expelled the bifhop, and 3 put to death or baniftied all the nobility ; by whicb means the popular government w'as fully eftablifhed j and Torriano, under this pretence, ruled every thing as he pleafed. He was, however, foon oppofed by one Francifco Sepri, who formed a great party, pre¬ tending to deliver the city from Torriano’s haughti- nefs and cruelty. But while the two parties were collefling their forces again!! each other, Cardinal Ubaldini was projecting the deftru&ion of both, by means of his favourite Otho. This prelate had for fome time borne an implacable hatred to Torriano, becaufe he had been by him prevented from carrying out of the treafury of St Ambrofe’s church at Mi¬ lan, a carbuncle or jewel of great value, which he pre¬ tended to referve for adorning the papal tiara; for which reafon he now determined to oppofe his ambition. Ubaldini began with naming Otho archbifhop of Milan ; which, as the pope’s legate, he had a right to do. This nomination was confirmed by Pope Ur- ban IV. ; and the party of the nobility having now got a head from the pope himfelf, began to gather ftrength. Otho in the mean time employed himfelf in collecting troops ; and had no fooner procured a fhow of an army, than he advanced towards Lago Mag- giore, and took pofiefiion of Arona, a ftrong poft near that lake : but Torriano, marching immediately again!! him with all his troops, obliged him to aban¬ don the place, and leave his party to make the beft terms they could with the conqueror. This was fol¬ lowed by the deftru&ion of the caftles of Arona, Anghiari, and Brebia : foon after which Torriano died, and was fucceeded by his brother Philip, who had fufficient intereft to get himfelf eleCled podefta, or praetor of Milan, for ten years. During his lifetime, however, the party of the nobility increafed confider- ably under Otho, notwithftanding the check they had received. Philip died in 1 265, having loft ground con- fiderably in the affections of the people, though be ob¬ tained a great reputation for his courage and condu£f. His fucceffor Napi rendered himfelf terrible to the nobility, whom he profcribed, and put to death as of¬ ten as he could get them into his power. He pro¬ ceeded fuch lengths, and adled with fuch fury again!! that unfortunate party, that Pope Clement IV. who had fucceeded Urban, at laft inteidifted Milan, and excommunicated Napi and all his party. By this Napi began to lofe his popularity, and the public dif- affe£lion towards him was much heightened by the natural cruelty of his temper. But in the mean time, the party of the nobility was in the utmoft diftrefs. Otho himfelf and his friends, having fpent all their flibftance, wandered about from place to place ; the pope not being in a capacity of giving them any af- fiftance. Otho, however, was not difcouraged by hiy bad fuccefs, but found means ftill to keep up the fpirits of his party, who now chofe for their general Squar- cini Burii, a man of great eminence and courage, whofe daughter was married to Matthew Vifconti, afterwards called Matthew the Great. At the fame time they re¬ newed their confederacy with the marquis of Montferrat, who was fon-in-law to the king of Spain. The marquis agreed to this confederacy chiefly with a view to become mafter of the Milanefe.. The nobility now again began to make head ; and having colle&ed an army, which was joined by 600 Spaniib Milan. MIL [89 Milan. Spanilh cavalry and a body of foot, gained fome ad- vantages. But in the mean time Napi, having gather¬ ed together a fuperior army, fuddenly attacked Otho ^and Burri, and defeated them. After this difafter Otho applied to the pope $ from whom, however, he did not obtain the affiftance he defired ; and in the mean time Napi invited the emperor Rodolph into Italy, with the promife of being crowned at Milan. This invitation was accepted of with great readinefs by Rodolph ; who conftituted Napi his governor and vicar-general in Lombardy, lending to him at the fame time a fine body of German horfe, the command of which was given to Caffoni, Napi’s nephew. On this Otho again applied to the pope (Gregory X.) 5 but he was fo far from granting him any afliftance j that he is faid to have entered into a fcheme of affaflinating him privately •, but Otho efcaped the danger, and in 1 276 began to recover his affairs. The reafon of Pope Gre¬ gory’s enmity to him was, that he and his party were thought to be Gibelines, and were oppofed by great numbers of the nobility therafelves j but after that pope’s death, the Milanefe exiles being united under one head, foon became formidable. They now chofe for their general Godfrey count of Langufio, a noble Pa- vian, and an inveterate enemy of the Torriano family. This nobleman being rich and powerful, enlifted many German and other mercenaries, at whofe head he mar¬ ched towards the Lago Maggiore. All the towns in that country opened their gates to him, through the in- tereft of the Vifconti family, who refided in thefe parts. But this fuccefs foon met with a fevere check in an un¬ fortunate engagement, wherein Godfrey was defeated and taken prifoner ; after which he and 34 nobles had their heads ftruck off, and fent from the field of battle piled up in a common waggon. This defeat greatly affefted Otho j but having in a fhort time recovered himfelf, he again attacked his enemies, and defeated them •, but, fuffering his troops to grow remifs after their viftory, the fugitives rallied, and entirely defeated him. The next year, however, Otho had better fuccefs, and totally defeated and took prifoner Napi himfelf. After this victory Caffoni was obliged to abandon Milan to his competitor, who kept poffeflion of it till his death, which happened in 1295, in the 87th of year of his age. Otho was fucceeded by Matthew Vifconti above mentioned ; and Milan continued in fubje&ion to that family without any very memorable occurrence till the year 1378, when, by the death of Galeazzo II. his brother Barnabo became fovereign of Milan. He was of a brave and aftive difpofition $ but exceflively pro- fufe in his expences, as his brother Galeazzo had alfo been •, and to procure money to fupply his extra¬ vagancies, was obliged to opprefs his fubje£ls. Ga¬ leazzo had engaged in an enterprife againft Bologna, and the fiege of it was continued by Barnabo. It lafted for nine years ; and during this time is faid to have coft 300 millions of gold, a prodigious fum in thofe days, near 40 millions fterling, the lowed: gold coin being in value fomewhat more than half a-crown Englifti. Both the brothers rvere exceflively fond of building. Barnabo eredfed a bridge over the Adda, confifting of three ftories; the lovveft for chariots and heavy carriages, the middle for horfes, and the up- permoft for foot paffengers. He built aJfo another Vol. XIV. Part I. ] MIL bridge which was carried over houfes without touching Lilian, them. To accomplifli thefe, and many other expenfive v fchemes, he . became one of the greateft tyrants imagi¬ nable, and every day produced frefli inftances of his ra¬ pacity and cruelty. He inftituted a chamber of inquiry, for punifhing all thofe who had for five years before been guilty of killing boars, or even of eating them at the table of another. They who could not redeem themfelves by money wrere hanged, and above 100 wretches perilhed in that manner. Thofe who had any thing to lofe were dripped of all their fubftance, and obliged to labour at the fortifications and other pub¬ lic works. He obliged his fubje&s to maintain a great many hunting dogs, and each diftridl was taxed a certain number. The overfeers of his dogs were at the fame time the inftruments of his rapacity. When the dogs were poor and flender, the owners were al¬ ways fined ; but when the dogs were fat, the owners were alfo fined for fuffering them to live without exercife. The extravagant behaviour of Barnabo foon rendered public affairs ready for a revolution, which was at lafl: accomplifhed by bis nephew John Galeazzo. He af¬ fected a folitary life, void of ambition, and even inclin¬ ing to devotion } but at the fame time took care to have his uncle’s court filled wdth fpies, who gave him infor¬ mation of all that paffed. Pie reduced his table and manner of living, pretending that he took thefe fteps as preparatives to a retirement from the world, which was foon to take place, after he had paid a religious vow. In fliort, he aCted his part fo well, that even Barnabo, though abundantly cautious, had no fufpicion of his having any defigns againft him •, and fo entirely did he conceal his ambition, that he feveral times made application to his uncle for his intereft to procure him a quiet retreat as foon as his religious vows were perform¬ ed. One of thefe was to pay a vifit to the church of the bleffed Virgin upon Mount Varezzio. This was to be done with fo much fecrecy that all kinds of eye wit- neffes were to be excluded ; and it was with difficulty that Barnabo himfelf and two of his fons were allowed to accompany our devotee. But, in the mean time, the hypocritical Galeazzo had foldiers advancing from all quarters •, fo that Barnabo and his fons were imme¬ diately feized, and the houfes of thofe who had fided with them given up to be plundered. The booty in plate, money, and all kinds of rich furniture, was im- menfe. The minifters of the late government were dragged from their hiding places, and put to death ; and at lafl: the citadel itfelf fell into the hands of Ga¬ leazzo, who found in it an immenfe fum of money. Barnabo was carried prifoner to Tritici, a caftle of his own building, where he had the happinefs to find one perfon ftill faithful to him. This was his miftrefs, named Doninia Porra} who, when he was abandoned by all the world, (hut herfelf up a voluntary prifoner in his chamber, and remained with him as long as he lived, which was only feven months after his degrada¬ tion. John Galeazzo was the firft who took upon him the title of the Duke of Milan, and was a prince of great policy and no lefs ambition. He made war with the Florentines, became mafter of Pifa and Bologna, and entirely defeated the emperor in 1401, fo that he en¬ tertained hopes of becoming mafter of all Lombardy, and cutting off all poflibility of invading it either from M Franca M I L [ 9° ] M 1 L Mi5an. France or Germany ^ but bis defigns were frilftrated —v—- -by death, which happened in 1402, in the 55th year of his age. After his deceafe the Milanefe govern¬ ment fell into the moff violent diftraftions, fo that it could not be fupported, even in time of peace, with¬ out an army of 20,000 foot and as many horfe. In the year 1421, however, Philip duke of Milan became ma¬ iler of Genoa •, but though he gained great advantages in all parts of Italy, the different Hates Hill found means to counterbalance his fucceffes, and prevent him from enllaving them : fo that Milan never became the capital of any extenfive empire j and in 1437 f-*61108- re* volted, and was never afterwards reduced. Philip died in 1448, and by his death the male line of the Vifconti family was at an end. The next law¬ ful heir was Valentina his lifter, who had manied the duke of Orleans, fon to Charles V. of France. By the contiaff of that marriage, the lawful progeny of it was to fucceed to the duchy of MUlan in failure of the heirs male of the Vi conti family j but this fucceffion was difputed by Sforza, who had married Philip s na¬ tural daughter. It is certain, however, that the right¬ ful fucceftion was veiled in the houfe of Orleans and the kings of France •, and therefore though the Sfor¬ za family got pofleffion of the duchy for the prefent, Louis XII. afterwards put in his claim, being a grand- fon to John Galeazzd. For fome time he was fucceis- ful ; but the French behaved in fuch an infolent man¬ ner, that they were driven out of the Milanele by the Swifs and Maximilian Slorza. ihe Swifs and Mila¬ nefe were in their turn expelled by Francis I. w’ho obliged the Sforza family to relinquith the government for a penfion of 30,000 ducats a-year. Francis Sforza, the fon of Maximilian, however, being afiifted by tne emperor and the pope, regained the poffelTion of the Milanefe about the year 1 521 j and, eight years after, the French king, by the treaty of Cambray, gave up his claim on the duchy. But, in fa£f, the emperors of Germany feem to have had the faireft title to the Milanefe in right of their be¬ ing for a long time fovereigns of Italy. On the death of Francis Sforza, therefore, in the year 1536, the em¬ peror Charles V. declared the Milanefe to be an impe¬ rial fief, and granted the inveftiture of it to his fon Philip II. king of Spain. In his family it continued till the year 1^06, when the French and Spaniards were driven out by the Imperialifts, and the emperor again took poffeflion of it as a fief. It was confirmed to his |oufe by the treaty of Baden in 1714, by the quadruple alliance in 1718, and by the treaty of Aix-la- Chapelle in 1748. The duchy of Milan is one of the fineft provinces in Italy. It is bounded on the foutb by the Apen- nine mountains, and the territory of Genoa 5 on the north by Switzerland ; on the eaft by the Venetian territories, and the duchies of Mantua, Parma, and Placentia •, and on the weft by Savoy, Piedmont, and Montferrat ; extending from north to fouth about IOO miles, and from eaft to weft about 108. It is well watered by the Teflino, the Sefia, the Adda, the Po, the Ogho, the Lombro, Serio, &c. and alfo by fe- veral canals and lakes. Of the latter, the Lago Mag- giore is between 30 and 40 miles in length, and in fome places fix or feven miles broad. In it lie the Bormean ijlandsi as they are called, viz, Ifola Bella and Ifola Madre, the beauty of which almoft exceeds Mnan. imagination : art and nature teem to have vied vsith ^ one another in embelliftfing them. In each of them is a palace with delicious gardens, belonging to the Boromean family. The water of the lake is clear and of a greemth colour, and abounds with fifh. Ihe hills with which it is furrounded prelent a molt charm¬ ing lantifcape, being planted with vines and chcinut trees, interiperied with lummer houles. I here is a canal running from it towards Switzerland, with which the city of Milan has a communication. It was an¬ ciently called Lacus Verbanus. The Lago de Como, which was called by the Latin poets Lacus Lariusy but had its modern name from the city near which it lies, extends itfelf about 30 miles northward from Como, but its greattft breadth is not above five miles. From the Lago Maggiore iffues the Teftino *, and from that of Como the Adda. Of the other lakes, that of Lu¬ gano and Guarda are the chief: that of Guarda was anciently called Benacus. The trade and manufa&ures of this duchy confift prin¬ cipally in filk fluffs, dockings, gloves, and handkerchiefs, linen and woollen cloth, hardware, curious works of cry- ftal, agate, hyacinths, and other gems; but their exports are uiually far ihovt of their imports. As to the revenue of the duchy, it muft without doubt be very confiderable. It is laid to have amount¬ ed to 2,000,000 of dollars while the duchy was in the hands of the Spaniards. In the year 1767, the Auftrian government of Milan- publilhed a law, by which all the rights which the pope or the bilhops had till then exercifed over ecclefialtics, either with regard to their effeffs or perfons, was tranf- ferred to a council eftablifhed for that purpofe at Mi¬ lan. By the fame edidf, all eccitnaftics were obliged to fell the eftates which they had become poffeffed of fince the year 1722 ; and no lubjeft, whether ecclefi- aftic or fecular, was to go to Rome to folicit any fa¬ vour, except letters of indulgence, w ithout the confent of the laid council. This duchy was fubdued by the French in the year 1796, when it wTas regarded as a conftituent part of the Cifalpine republic. When hoftiliues recommenced in 1799, it was again taken by the allies, but after¬ wards reconquered by the army of Dijon under Bona¬ parte, who entered the metropolis on the 2d of June 1800. It now forms part of the kingdom of Italy. Milan, the capital of the duchy of that name, in Latin Mediolanum, is a very large city, and has a wall and rampart round it, with a citadel ; yet is thought to be incapable of making any great refiftance. The gardens within the city take up a great deal of ground. In the citadel is a foundery for cannon, and an arfenal furnilhed with arms for 1 2,000 men. The governor of it is quite independent of the governor general of the Milanefe, who refides in the city, in a large but old and ill contrived palace. The yearly income of the governor of Milan is faid to be 200,000 guilders. The council belonging to the city is com- _ pofed of a prefident and 6o doctors of lawq who are all nobles, and independent of the governor general. Milan hath experienced a great variety of fortune, having been fubjeft fometimes to the French, fome- tiraes to the Spaniards, and fometimes to the Germans.. A 1 M I L Milan. A great number of perfons of rank and fortune live in it, efpecially during the winter. The ladies in France are not allowed more liberty than thofe of this city ; even the aufterities of the monaftic life are fo far mitigated here, that gentlemen have not only the liberty of talking with tire nuns, and of rallying and laughing at the grate, but alfo of joining with them in concerts of mufic, and of fpending whole afternoons in their company. The place where the beau monde take the air, either in their coaches or on foot, is the rampart betwixt the Porta Orientale and the Porta Tofa, where it is ftraight and broad, and extremely pleafant, being planted with white mulberry trees, and commanding a profpedt on one fide of the open country, and on the other of the gardens and vineyards between the ramparts and the city. Milan, which is faid to have been built by the Gauls about 200 years after the foundation of Rome, contains a great number of ftately edifices, as churches, convents, palaces, and hofpitals. The cathedral is a vaft pile, all of marble; and though fomething has been doing for near 400 years towards the outward or inward ornament thereof, it is not yet finifhed. Of the great number of ftatues about it, that of St Bartholomew, juft flead alive, with his (kin hanging over his {boulders ; and of Adam and Eve, over the main portal, are the fineft. The pillars fupporting the roof of the church are all of marble, and the windows finely painted. This church contains a treafiire of great value, particularly a ftirine of rock cryftal, in which the body of St Charles Bo- romaeo is depofited. The other churches moft worthy a ftranger’s notice are thofe of St Alexander, St Je¬ rome, St Giovanni di Cafarotti della Paftione, that of the Jefuits, and of St Ambrofe, in which lie the bo¬ dies of the faint and of the kings Pepin and Bernard. In the Ambrofian college, founded by Frederic Bo- lomeeo, 16 profeflbrs teach gratis. In the fame col¬ lege is alfo an academy of painting, with a mufeum, and a library containing about 45,000 printed books and manufcripts ; among the laft of which is a tranflation of Jofephus’s Hiftory of the Jews, done by Rufinus about 1200 years ago, and written on the bark of a tree ; St Ambrofe’s works on vellum, finely illuminated ; the oration's of Gregory Nazianzen, and the works of Virgil, in folio, with Petrarch’s notes. In the mufeum are Leonard! da Vinci’s mathematical and mechanical drawings, in 12 large volumes. The feminary for fciences, the college of the nobles, the Helvetian college, and the mathematical academy, are noble foundations, and {lately buildings. Of the hof¬ pitals, the moft remarkable are the Lazaretto, and that called the great hofpital; the latter of which re¬ ceives fick perfons, foundlings, and lunatics, and has fix j mailer hofpitals depending on it, with a revenue of 100,000 rix dollars. The number of the inhabitants of this city is faid to be about 250,000. It has been 40 times bef.eged, taken 20 times, and four times almotl entirely deino- liftied ; yet it hath always recovered itfelf. It is faid that gunpowder is fold here only by one perfon, and in one place. The court of inquifition is held in the Dominican convent, near the church of Madonna della Gratia. I he houfes of entertainment, and the ordinaries here, are reprefented as very indifferent.— Mi Key Her fays, it is not unufual for youn^ travellers, M I L when they go to any of the taverns in Milan, to be Milan, aflced, *“ whether they choofe a letto fornito, or female v—* bedfellow,” who continues malked till Ihe enters the bedchamber. Milan is defcnbed as inferior to Turin both in beauty and conveniency, many of the ftreets being crooked and narrow, and paper windows much more frequent than in that city ; even in grand pa¬ laces, the windows are often compofed promifcuoufly of glafs and paper. Two large canals extend from hence, the one to the Teflino, and the other to the Adda ; the Teffino having a communication with the Lago Maggiore, and, by a canal, with the Sefia ; and the Adda iffuing from the Lago di Como, and having a communication by canals with the Lombro and Serio. In a void {pace in one of the ftreets of Milan, where flood the houfe of a barber who had confpired with the commiffary of health to poifon his fellow citizens, is ere&ed a pillar called Colonna In¬ fame, with an infeription to perpetuate the memory of the execrable defign. The environs of this city are very pleafant, being adorned with beautiful feats, gardens, orchards, &c. About two Italian miles from it, at the feat of the Simonetti family, is a build¬ ing, that would have been a malterpiece of its kind had the architect defigned it for an artificial echo. It will return or repeat the report of a piftol above 6a times; and any fingle mufical inftrument well touched will have the fame effetl as a great number of inftru- ments, and produce a moft; furprifing and delightful concert. According to Dr Moore, “ there is no place in Italy, perhaps in Europe, where ftrangers are received in fiich an eafy hofpitable manner as at Milan. For¬ merly the Milancle nobility difplayed a degree of fplendour and magnificence, not only in their enter¬ tainments, but in their ufual ftyle of living, unknown in any other country of Europe. They are under a neceflity at prefent of living at lefs expence, but they ftill fhow the fame obliging and hofpitable difpofition. This country having, not very long fince, been pof- feffed by the French, from whom it devolved to the Spaniards, and from them to the Germans, the troops of thofe nations have, at different periods, had their refidence here, and in the courfe of thefe vi- cifiitudes, produced a ftyle of manners, and {tamped a charadler on the inhabitants of this duchy, different from what prevails in any other part of Italy ; and nice obfervers imagine they perceive in Milanefe man¬ ners the politenefs, formality, and honefty imputed to thofe three nations, blended with the ingenuity na¬ tural to Italians. The great theatre having been burnt to the ground laft year, there are no dramatic entertainments, except at a fmall temporary play-houfe, which is little frequented ; but the company affemble every evening in their carriages on the ramparts, and drive about, in the fame manner as at Naples, till it is pretty late. In Italy, the ladies have no notion of quitting their carriages at the public walks, and ufing their own legs, as in England and France. On fee¬ ing the number of fervants, and the fplendour of the equipages which appear every evening at the Corfo on the ram parts, one would not fufpe£t that degree of depopulation, and diminution of wealth, which we are affured has taken place within thefe few years all over the Milanefe; and which proceeds from the bur- M 2 denfome [ 91 1 M I L Milborn- port . !l Miidew. [ 92 3 M I L denfome nature of fome late taxes, and tlie infolent and oppreffive manner in which they are gathered.”— E. Long. 9. 61. N. Lat. 45. 28. MILBORN-fort, a town of Somerfetihire in England, feated on a branch of the river Parret, 115 miles from London. Though reprefented in parlia¬ ment, it is no market town nor corporation ; but it appears in Domefday-book to have had a market once, and 56 burgefles. It is in a manner furrounded by Dorfetihire. Here are nine capital burgelfes, who yearly choofe two bailiffs, that have the government of the borough under them, and jointly return the members to parliament with the two flewards, who are chofen yearly out of nine commonalty ftew'ards, and have the cuftody of the corporation-feal. Thefe two ftewards alfo diftributc the profits of the lands given to the poor here, of which the faid coramonalty Rewards are truftees. The inhabitants are about 1100, the houfes not much above 200. There are two fairs, June 6. and Oftober 28. MILBROOK, a town of Cornwall, on the weft fide of Plymouth haven. It has a good fifhing trade, and has formerly furnifhed our fleet with many able hands. MILDENHALL, a town of Suffolk, feven miles from Newmarket, 12 from Bury, and 70 from Lon¬ don. It it a large populous town on the river Lark, a branch of the Oufe, with a harbour for boats. It has a wrell frequented market on Fridays, efpecially for fifh and wild-fowl. Its church has a towrer or iteeple 1 20 feet high. E. Long. o. 26. N. Lat. 5 2. 29. MILDEW, is faid to be a kind of thick, clammy, fweet juice, exhaled from, or falling down upon, the leaves and bloffoms of plants. By its thicknefs and clamminefs it prevents perfpiration, and hinders the growth of the plant. It fometimes refis on the leaves of trees in form of a fatty juice, and fometimes on the ears of corn. It is naturally very tough and vifcous, and becomes ftill more fo by the fun’s heat exhaling its more fluid parts ; by which means the young ears of corn are fo daubed over, that they can never arrive at their full growth. Bearded wheat is lefs fubjedf to the mildew than the common fjrt 5 and it is obferved that newly dunged lands are more liable to mildew than others. The beft remedy is a fmart fhowTer of rain, and immediately afterwards a brilk wind. If the mildew is feen before the fun has much powrer, it has been recommended to fend two men into the field with a long cord, each holding one end ; and drawing this along the field through the ears, the dew will be diflodged from them, before the heat of the fun is able to dry it to that vifcous ftate in which it does the mifchief. Some alfo fay, that lands wfinch have for many years been fubjeft to mildews, have been cured of it by fowing foot along with the corn, or immediately after it, Mr J. S. Segar, the author of a treatife upon this fubjedl, obferves, that the mildew is of fuch a fharp corrofive nature, that it raifes blifiers on the feet of the (hepherds who go barefoot, and even confumes the hoofs of the cattle. He fufpedls that it poffelTes fome arfenical qualities, though he does not pretend to affirm this pofitively. Its pernicious influence, ac¬ cording to him, is rendered ftill more powerful by a variety of circumftances j fuch as fending the cattle into the fields too early in the fpriug •, their drinking water mixed, with ice, or but lately thaw-ed ; their being kept in ftables that are too dole and filthy, and which are not fufficiently aired. The fame author confiders the mildew as a principal caufe of epidemical diftem- pers among the cattle. The mildew producing thefe dileafes, he fays, is that which dries and burns the grafs and leaves. It falls dually in the morning, particularly after a thunder ftorm. Its poilonous quality (which does not continue above 24 hours) never operates but when it has been fwallowed imme¬ diately after its falling. The diforder attacks the ftomach, is accompanied with pimples on the tongue, lofs of appetite, a deficcation of the aliments in°the ftomach, a cough, and difficulty of refpiration. As a prefervative, the author preferibes purging in fpring and in winter. The medicine he advifes is compofed of 30 grains of fulphur of antimony, and 60 grains of refin of jalap. He is againft vomiting, and every thing that is of a heating nature. MILE, a meafure of length or diftance, containing eight furlongs. The. Englifh ftatute mile is 80 chains, or 1760 yards ; that is, 5280 feet. We ftiall here give a table of the miles in ufe among the principal nations of Europe, in geometrical paces, 60,000 of whijeh make a degree of the equator. Mile, Miletus. Mile of Ruffia of Italy of England of Scotland and Ireland Old league of France The finall league, The mean league, The great league, ifoW. Mile of Poland of Spain of Germany of Sweden of Denmark of Hungary Geometrical paces. 750 IOOO I 200 1500 1500 2000 25OO 3000 3000 3428 4000 yOOO 5000 6000 MILETUS, in Ancient Geography, a town of Crete mentioned by Homer ; but where fituated does not ap¬ pear. It is faid to be the mother town of Miletus in Caria, whither a colony was led by Sarpedon, Minos’s brother, (Ephorus, quoted by Strabo). Mi/ejii, the people, (Ovid). Miletus, in Ancient Geography, a celebrated town of Afia Minor, on the confines of Ionia and Caria. It was the capital city of all Ionia, and famous both for the . arts of war and peace. It was fituated about 10 ftadia fouth of the mouth of the river Mteander, near the fea coaft. It was founded by a Cretan colony under Miletus, the companion of Bacchus j or (according to others) by Neleus the fon of Codrus; or by Sarpedon a fon of Jupiter. It has fucceflively been called Lelegeis, Pithyufa, and AnaBoria. The inhabitants, called Mi leftwere very powerful, and long maintain¬ ed an obftinate war againft the kings of Lydia. They early applied themfelves to navigation ; and planted no lefs than 80 colonies, or (according t-o Seneca) 380, in different parts of the world, ft was the only town that made head againft Alexander, and was with much difficulty taken. It gave birth to Thales,. MIL [ 93 ] MIL Milfoil, Thales, one of the feven wife men, and the firft who Milford, applied himfelf to the' ftudy of nature. It was alfo the country of Anaximander, the fcholar and fuccef- for of Thales, the inventor of fun dials and the gno¬ mon, and the hrft that publifhed a geographical map j of Anaximenes, fcholar and fucceifor to the forego¬ ing; and of other great men. It was noted for its excellent wool, according to Virgil ; and was alfo ce¬ lebrated for a temple and oracle of Apollo Didy- maeus. This famous people, from being powerful, becoming afterwards opulent and abandoned to plea- fures, loft both their riches and their power.—At prefent it is called by the Turks Melas, and not far diftant from it runs the river Maeander. St Paul go¬ ing from Corinth to Jerufalem palled by Miletus, and as he went by fea, and could not take Ephefus in his way, he caufed the bilhops and priefts of the church of Ephefus to come to Miletus (A£ls xx. 15. &c.), which was about 1 2 leagues from them. MILFOIL, or Yarrow. See Achillea, Botany Index. MILFORD, a town of Suffex county, in the De¬ laware ftate, is fituated at the fource of a fmall river, 15 miles from Delaware bay, and 150 fouthward of Philadelphia. This town, which contains about 80 houfes, has been built, except one houfe, fince the re¬ volution. It is laid out with much tafte, and is by no means difagreeable. The inhabitants are Epifcopalians, Quakers, and Methodifts. Miltord Haven, one of the fineft harbours in Europe, and indifputably the belt in Britain, is fitu¬ ated in Pembrokelhire in South Wales, and lies on the north fide of the Briftol channel. It is very large, fafe, and deep ; there is no danger of going in or out with the tide, or almoft with any wind. If a ftiip comes in without a cable or anchor fhe may run aihore on the ooze, and there lie fafe till Ihe is refitted ; and in an hour’s time Ihe may get out of the harbour into the open fea. It lies extremely convenient for ftiips bound from the Englifti or Briftol channels to Ireland, or farther weft, and from thence to the channels. It is faid, that 1000 fail of any flze may ride fecure in this haven. It has 16 deep and fafe creeks, five bays, and 13 roads, all diftinguilhed by their feveral names. The fpring tide rifes 36 feet, fo that fhips may at any time be laid aihore. Dale harbour is a ready outlet for fmall veflels, where they may ride in two or three fathoms at low water.—In the reign of Queen Elizabeth, before the Spanilh inva- fion, two forts were begun at the entrance of Mil¬ ford Haven, one on each fide, called Nang/e and Da/e blockhoufes ; but they were not then finilhed.— The Stack-rock rifes here above water, lying near the middle of the entrance between Nangle and Dale. Penermouth is the opening of that branch of the ha¬ ven on which the town of Pembroke is feated, and where the cuftomhoufe of Milford is kept. The breadth of the entrance between rock and rock is but 200 yards at high water, and 112 at low water. There is a ridge of rocky ground that has the name of Carrs, which runs almoft acrofs Milford Haven, from Peter church towards Llandftadwrell, where it renders the landing place difficult to ftrangers, from its not appearing at low water. The great conveni¬ ence of this harbour isr that in a hour’s time a fbip may be in or 'out of it, -and in the way between the Miliary- Land’s End and Ireland. As it lies near the mouth H of the Severn, a ftiip in eight or ten hours may be 1 1 lt'ar^‘ over on the coaft of Ireland, or off the Land’s End in the Englifti Channel ; and a veffel may get out hence to the weft much fooner than from either Ply¬ mouth or Falmouth. This harbour has been greatly improved by new wrorks, at the expence of the go¬ vernment. The parliament on April 14. 1759 granted io,oooL for fortifying the harbour of Milford, all of which was expended on the fort at Neyland, which, however, ftill remains unfinhhed. MILIARY, in general, fomething refembling mil¬ let feed. Miliary Fever. See Medicine Index. MILITANT, or Church-militant, denotes the body of Chriftians while here on earth. MILITARY, fomething belonging to the foldiery or militia. Military Difcipline, the training of foldiers, and the due enforcement of the laws and regulations inftituted by authority for their conduff. Next to the forming of troops, military dilcipline is the firft objeff that prefents itfelf to our notice ; it is the foul of all armies; and unlefs it be eftabliffied amongft them with great prudence, and fupported with unftiaken refolution, they are no better than fo many contemptible heaps of rabble, which are more danger¬ ous to the very ftate that maintains them than even its declared enemies. Military Execution, the ravaging or deftroying of a country, or town, that refufes to pay the contribution inftifled upon them. Military Exercife. See Exercise and WORDS of Command. Military State, in Britifti polity, one of the three divilions of the laity- See Laity. This ftate includes the whole of the foldiery, or fuch perfons as are peculiarly appointed among the reft of the people for the fafeguard and defence of the realm. In a land of liberty, it is extremely dangerous to make a diftinft order of the profeffion of arms. In ab- folute monarchies, this is neceffary for the fafety of the prince ; and arifes from the main principle of their conftitution, which is that of governing by fear ; but, in free ftates, the profeffion of a foldier, taken fingly and merely as a profeffion, is juftly an objeff of jea- loufy. In thefe no man ffiould take up arms but with a view to defend his country and its laws : he puts not off the citizen when he enters the camp; but it is be- caufe he is a citizen, and would wilh to continue fo, that he makes himfelf for a while a foldier. The laws therefore, and conftitution of thefe kingdoms, know no fuch ftate as that of a perpetual Handing foldier, bred up to no other profeffion than that of war ; and it wTas not till the reign of Henry VII. that the kings of England had fo much as a guard about their per¬ fons. In the time of the Anglo-Saxons, as appears from EdwTard the Confeffor’s laws, the military force of England w7as in the hands of the dukes or heretochs,. who were conftituted through every province and county in the kingdom ; being taken out of the princi¬ pal nobility, and fuch as were moft remarkable for be¬ ing: MIL/ [ 94 ] MIL Military, ing fopienles, fidclex, et animoji. Their duty was to lead and regulate the Englifh armies with a very unlimited power ; prout eis vifum fuerit, ad iionorem coro/ix et uh- litatem regni. And becaufe of this great power they were ele6ted by the people in their lull affembly, or folkmote, in the fame manner as fheriffs were elected : following ftill that old fundamental maxim of the Saxon conftitution, that where any officer was intruded with fuch power, as, if abufed, might tend to the oppreflion of the people, that power was delegated to him by the Vote of the people themfelves. So too, among the an¬ cient Germans, the ancedors of our Saxon forefathers, they had their dukes, as well as kings, with an inde¬ pendent power over the military, as the kings had over the civil date. The dukes were elective, the kings he¬ reditary : for fo only can be confidently underdood that pafiage of Tacitus, Reges ex Habilitate, duces ex virtute fumunt. In condituting their kings, the family or blood royal was regarded 5 in choofing their dukes or leaders, warlike merit : jud as Caefar relates of their ancedors in his time, that whenever they went to war, by way either of attack or defence, they eledted leaders to com¬ mand them. This large diare of power, thus conferred by the people, though intended to preferve the liberty of the fubjedf, was perhaps unreafonably detrimental to the prerogative of the crown : and accordingly we find 1 a very ill ufe made of it by Edric duke of Mercia, in the reign of King Edmund Ironfide \ who, by his of¬ fice of duke or heretoch, was entitled to a large com¬ mand in the king’s army, and by his repeated trea¬ cheries at lad transferred the crown to Canute the Dane. It feems univerfally agreed by all hidorians, that King Alfred fird fettled a national militia in this king¬ dom, and by his prudent difeipline made all the fub- jefts of his dominions foldiers : but we are unfortu¬ nately left in the dark as to the particulars of this his fo celebrated regulation 5 though, from what w7as lad oblerved, the dukes feem to have been left in pofieflion of too large and independent a power : which enabled Duke Harold, on the death of Edward the Confeffor, though a dranger to the royal blood, to mount for a fhort fpace the throne of this kingdom, in prejudice of Edgar Etheling the rightful heir. Upon the Norman conqued, the feodal law was in¬ troduced here in ail its rigour, the whole of which is built on a military plan. In confequence thereof, all the lands in the kingdom were divided into what were call knight's fees, in number above 60,000 j and for every knight’s fee, a knight or foldier, miles, was bound to attend the king in his wars, for 40 days in a year j in which fpace of time, before war was reduced to a Icience, the campaign was generally finiflied. and a kingdom either conquered or vitlorious. By this means the king had, without any expence, an army of 60,000 men always ready at his command. And ac¬ cordingly we find one, among the laws of William the Conqueror, which in the king’s name commands and firmly enjoins the peiional tttendance of all knights and others ; quod haleant et tern ant fe femper in armis et equis, ut decet et oportet: et quod femper Jint prornpti et parati adfermtium fuum integrum nobis explendum et per- agendum, cum opus adfuerit, fecundum quod debent de feodis et tenementis fuis de jure nobis facere. This perfonal fervicc in procefs of time degenerated into 2 pecuniary commutations or aids; and at iaft thev mi- Military. litary part of the feodal fyftem was aboliihed at the v’-— Reiteration, by ftat. 12 Car. II. c. 24. See Feodal System. In the mean time, w7e are not to imagine that the kingdom was left wholly without defence in cafe of domeftic infurredions, or the profped of foreign in- vafions. Befides thofe who by their military tenures were bound to perform 40 days fervice in the field, firit the affize of arms, enaded 27 Hen. II. and afterwards the ftatute of Winchefter, under Edw’ard I. obliged every man, according to his eftate and degree, to pro¬ vide a determinate quantity of fuch arms as were then in ufe, in order to keep the peace ; and condables were appointed in all hundreds by the latter ilatute, to fee that fuch arms were provided. Thefe weapons were changed, by the ftatute 4 and 5 Ph. and M. c. 2. into others of more modem fervice •, but both this and the former provifions were repealed in the reign of James I. While thefe continued in force, it was ufual from time to time for our princes to iffue commiliions of array, and fend into every county officers in whom they could confide, to mufter and array (or fet in military order) the inhabitants of every diftrift *, and the form of the commiffion of array was fettled in parliament in the 5 Hen. IV. But at the fame time it was provided, that no man fhould be compelled to go out of the kingdom at any rate, nor out of his (hire, but in cafes of urgent neceffity 5 nor ftiould provide foldiers unlefs by confent of parliament. About the reign of King Henry VIII. and his children, lord-lieutenants began to be introdu¬ ced, as Handing reprefentatives of the crown, to keep the counties in military order j for we find them men¬ tioned as known officers in the ftatute 4 and 5 Ph. and M. c. 3. though they had not been then long in ufe ; for Camden fpeaks of them in the time of Queen Eliza¬ beth as extraordinary magiftrates, conftituted only in times of difficulty and danger. In this ftate things continued till the repeal of the fta- tutes of armour in the reign of King James 1.5 after which, when King Charles I. had, during his northern expeditions, iffued commiflions of lieutenancy, and ex¬ erted fome military powers which, having been long ex- ercifed, were thought to belong to the crown, it be¬ came a queftion in the long parliament, how far the power of the militia did inherently refide in the king $ being now unfupported by any ftatute, and founded only upon immemorial ufage. This queftion, long agi¬ tated with great heat and refentment on both fides, be¬ came at length the immediate caufe of the fatal rupture between the king and his parliament : the two houfes not only denying this prerogative of the crown, the le¬ gality of which claim perhaps might be fomewhat doubt¬ ful •, but alfo feizing into their hands the entire power of the militia, the illegality of which ftep could never be any doubt at all. Soon after the reftoration of King Charles II. when the military tenures were aboliffied, it was thought pro¬ per to afeertain the power of the militia, to recognize the foie right of the crown to govern and command them, and to put the whole into a more regular method of military fubordination : and the order in which the militia now ftands by law, is principally built upon Tie ftatutes which were then enafted. It is true, the two laft of them are apparently repealed j but many of their provilions MIL [ ( Militarv. provifions are re-ena&ed, with the addition of fome new regulations, by the prefent militia laws j the general fcheme ot which is to difcipline a certain number of the inhabitants of every county, chofen by let for three years, and officered by the lord lieutenant, the deputy lieutenants, and other principal landholders, under a commiffion from the crown. They are not compellable to march out of their counties, unlefs in cafe of invafion or aflual rebellion, nor in any cafe compellable to inarch out of the kingdom. They are to be exercifed at dated times: and their difcipline in general is libe¬ ral and eafy ■, but, when drawn cut into actual fervice, they are fubjeft to the rigours of martial law, as necef- fary to keep them in order. This is the conftitutional fecurity which our laws have provided for the public peace, and for protefting the realm againft foreign or domeftic violence 5 and which the ftatutes declare as ef- fentially neceffary to the fafety and profperity of the kingdom. When the nation was engaged in wrar, more veteran troops and more regular difcipline were efteemed to be neceflary, than could be expeded from a mere militia j and therefore at fuch times more rigorous methods were put in ufe for the railing of armies and the due regula¬ tion and difcipline of the foldiery, which are to be looked upon only as temporary excrelcences bred out of the dillemper ot the ftate, and not as any part of the permanent and perpetual laws of the kingdom. For martial law, which is built upon no fettled principles, but is entirely arbitrary in its decifions, is, as Sir Mat¬ thew Hale obferves, in truth and reality no law, but fomething indulged rather than allowed as a law. The neceffity of order and difcipline in an army is the only thing whieh can give it countenance ; and therefore it ought not to be permitted in time of peace, when the king’s courts are open for all perfons to receive juftice according to the laws of the land. Wherefore, Thomas earl of Lancafter being convicted at Pontefraff, 15 Ed¬ ward II. by martial law, his attainder was reverfed 1 Edward III. becaufe it was done in time of peace. And it is laid down, that if a lieutenant, or other, that hath commiflion of martial authority, doth in time of peace hang or otherwife execute any man by colour of martial law, this is murder j for it is againft magna charta. And the petition of right enafts, that no fol- dier (hall be quartered on the fubjeft without his own ponfent ; and that no commiflion (hall ifliie to proceed within this land according to martial law. And where¬ as, after the Reftoration, King Charles II. kept up about 5000 regular troops, by his own authority, for guards and garrifons, which King James II. by degrees increafed to no lefs than 30,000, all paid from his own civil lift; it was made one of the articles of the bill of rights, that the railing or keeping a Handing army with¬ in the kingdom in time of peace, unlefs it be with con- fent of parliament, is againft law. But as the fafhion of keeping (landing armies (which was firft introduced by Charles VII. in France >445) has of late years univerfally prevailed over Europe (though fome of its potentates, being unable themfelves to maintain them, are obliged to have recourfe to richer powers, and receive fubftdiary penfions for that pur- pofe), it has alfo for many years pad been annually judged neceflary by our legiflature for the fafety of the kingdom, the defence of the pofTeflions of the crown of '5 1 MIL Great Britain, and the prefervation of the balance of Mi'itarv. power in Europe, to maintain even in time of peace a y Handing body of troops, under the command of the crown } who are however igfo faElo < ifbanded at the ex¬ piration of every year, unlefs continued by parliament. And it was enabled by ftatute 10 William III. c. 1. that not more than 1 2,000 regular forces ftiould be kept on foot in Ireland, though paid at the charge of that kingdom : which permiflion is extended by ftatute 3 Geo. III. c. 13. to 16,235 men ,n t’™6 °f peace. To prevent the executive power from being able to opprefs, (ays Baron Montefquieu, it is requifite that the armies with which it is intruded fhould conlill of the people, and have the fame fpirit with the people : as was the cafe at Rome, till Marius new-modelled the legions by enlifting the rabble of Italy, and laid the foundation of all the military tyranny that enfued.- Nothing then, according to thefe principles, ought to be more guarded r^ainft in a free ftate, than making the military power, when fuch a one is neceflary to be kept on foot, a body too diftinbl from the people. Like ours, therefore, it fttould wholly be compofed of natural fubjebls ; it ought only to be enlifted for a (hurt and limited time ; the foldiers alfo (hould live inter¬ mixed with the people ; no feparate camp, no barracks, no inland fortrefles (hould be allowed. And perhaps it might be (till better, if, by difmiffing a ftated number, ’ and enlifting others at every renewal of their term, a circulation could be kept up between the army and the people, and the citizen and the foldier be more inti¬ mately connefted together. To keep this body of troops in order, an annual abl of parliament likewife paflfes, “ to punifti munny and defertion, and for the better payment of the army and their quarters.” This regulates the manner in which they are to be difperfed among the feveral inn-keepers and vibfuallers throughout the kingdom *, and ellablilhes a law-martial for their government. By this, among other things, it is enabled, that if any officer or foldier (hall excite, or join any mutiny, or, knowing of k, (hall not give notice to the commanding otiicer, or (hall defert, or lift in any other regiment, or deep upon his poft, or leave it before he is relieved, or hold corre- fpondence with a rebel or enemy, or ftrike or ufe vio¬ lence to his fuperior officer, or (hall difobey his lawful commands j luch offender (hall (uffer fuch punilhment as a court martial (hall inflibl, though it extend to death itfelf. However expedient the moft ftribl regulations may be in time of abfual war, yet in times of profound peace, a little relaxation of military rigour would not, one (hould hope, be produblive of much inconvenience. And, upon this principle, though by our Handing laws (dill remaining in force, though not attended to) de¬ fertion in time of war is made felony without benefit of clergy, and the offence is triable by a jury, and be¬ fore the judges of the common law ; yet, by our mi¬ litia laws before mentioned, a much lighter puniftunent is inflicted for defertion in time of peace. So, bv the Roman law' alfo, defertion in time of war w’as punifh- ed with death, but more mildly in time of tranquil¬ lity. But our mutiny abt makes no fuch diftinbtion : for any of the faults above mentioned are, equally at- all all times, puniftiable with death itfelf, if a court mar- lial (hall think proper. This diferetionary power of MIL [ 96 T M I L Military, tine court inartial is indeed to be guided by the direc- l| v tions of the crown : which, with regard to military offences, has almolt an abfolute legiflative power, “ His Majefty (fays the a£t) may form articles of wTar, and conftitute courts martial, wdth power to try any crime by fuch articles, and inflift fuch penalties as the articles direft.” A vaft and molt important truft ! an unlimit¬ ed power to create crimes, and annex to them any pu- nifliments not extending to life or limb ! Thefe are in¬ deed forbidden to be inflidted, except for crimes decla¬ red to be fo punifhable by this adt j which crimes we have juft enumerated, and among which, wTe may ob- ferve, that any difobedience to lawful commands is one. Perhaps in fome future revifion of this adt, which is in many refpedts haftily penned, it may be thought worthy the wifdom of parliament to afcertain the li¬ mits of military fubjedlion, and to enadt exprefs ar¬ ticles of war for the government of the army, as is done for the government of the navy j efpecially as, by our prefent conftitution, the nobility and gentry of the kingdom, who ferve their country as militia officers, are annually fubjedted to the fame arbitrary rule during their time of exercife. One of the greatefl advantages of our law is, that not only the crimes themfelves which it punifhes, but alfo the penalties which it inflidls, are afcertained and notorious : nothing is left to arbitrary difcretion : the king by his judges difpenfes what the law has previ- oufly ordained, but is not himfelf the legiflator. How much, therefore, is it to be regretted, that a fet of men, whofe bravery has fo often preferved the liberties of their country, fhould be reduced to a flate of fervi- tude in the midft of a nation of freemen ; for Sir Ed¬ ward Coke will inform us, that it is one of the ge- filackjl. nuine marks of fervitude, to have the lawr, which is Comment, our rule of adfion, either concealed or precarious; Mifera ejl fervitus, ubi jus eji vagum aut incognilum. Nor is this date of fervitude quite confident with the maxims of found policy obferved by other free na¬ tions. For the greater the general liberty is which any date enjoys, the more cautious has it ufually been in introducing davery in any particular order or pro- fedion. Thefe men, as Baron Montefquieu obferves, feeing the liberty which others poffefs, and which they themfelves are excluded from, are apt (like eunuchs in the eadern feraglios) to live in a date of perpetual envy and -hatred towards the red of the community, and indulge a malignant pleafure in contributing to de- droy thofe privileges to which they can never be ad¬ mitted. Hence have many free dates, by departing from this rule, been endangered by the revolt of their flaves ; while, in abfolute and defpotic governments, where no real liberty exids, and conlequently no invi¬ dious comparifons can be formed, fuch incidents are extremely rare. Two precautions are therefore ad- vifed to be. obferved in all prudent and free govern¬ ments: 1. To prevent the introduflion of davery at all : or, 2. If it be already introduced, not to intrud thofe daves with arms, who will then find themfelves fin overmatch for the freemen. Much lefs ought the foldiery to be an exception to the people in general, and the only date of fervitude in the nation. But as foldiers, by this annual aft, are thus put in a worfe condition than !any other fubjefts ; fo, by the humanity of our danding laws, they are in fome cafes 4 put in a much better. By datute 43 Eliz. c. 3. a Military weekly allowance is to be raifed in every county for IJ the relief of foldiers that are fick, hurt, and maimed: , f not forgetting the royal hofpital at Chelfea for fuch as are worn out in their duty. Officers and foldiers, that have been in the king’s fervice, are by feveral da- tutes, enafted at the clofe of feveral wars, at liberty to ufe any trade or occupation they are fit for, in any town in the kingdom (except the two univerfities), notwithdanding any datute, cudom, or charter to the contrary. And ioidiers in aftual military fervice may make nuncupative wills, and difpofe of their goods, wages, and other perfonal chattels, without thefe forms, folemnities, and expences, which the law re¬ quires in other cafes. Our law does not indeed ex¬ tend this privilege fo far as the civil law, which car¬ ried it to an extreme that borders upon the ridiculous: for if a foldier, in the article of death, wrote any¬ thing in bloody letters on his fhield, or in the dud of the field with his fword, it was a very good military tedament. Military Court. See Chivalry, Court of. Military Tenures. See Tenure, Feodal Sys¬ tem, and Knight. Military Ways, (vice militaresj, are the large Ro¬ man roads which Agrippa procured to be made through the empire in the time of Augudus, for the more convenient marching of troops and conveyance of carriages. N. Bergier has written the hidory of the origin, progrefs, and amazing extent, of thefe military roads, which were paved from the gates of Rome to the extreme parts of the empire. See Way. MILITIA, in general, denotes the body of foldiers, or thofe who make profeffion of arms. In a more redrained fenfe, militia denotes the train¬ ed bands of a to\ 1 or country, who arm themfelves, upon a drort warning, for their own defence. So that, in this fenfe, militia is oppofed to regular or dated troops. See Military State, and Feodal System. MILIUM, millet, a genus of plants, belonging to the triandria clafs 5 and in the natural method ranking under the 4th order, Gramina. See Botany Index. MILK, a well known fiuid, prepared by nature in the breads of women, and the udders of other ani¬ mals, for the nouridrment of their young.—According to Dr Cullen *, milk is a connefting and intermediate * jeri on fubdance between animals and vegetables. It feems Mat. Med. immediately to be fecreted from the chyle, both being a white liquor of the fame confidence : it is mod co- pioudy fecreted after meals, and of an acefcent nature. In mod animals who live on vegetables, the milk is acefcent; and it is uncertain, though at the fame time no obfervation proves the contrary, whether it is not fo likewife in carnivorous animals. But, whatever be in this, it is certain, that the milk of all animals who live on vegetables is acefcent. Milk being derived from the chyle, we thence conclude its vegetable na¬ ture *, for in thofe who live on both promifcuoufly, more milk is got, and more quickly, from the vege¬ table {ban the animal food. Milk, however, is not purely vegetable j though v»e have a vegetable liquor that refembles its tade, confidence, colour, acefcency, and the feparability of the oily part, viz. an emulfion of the nuces oleofte and farinaceous fubdances. But thefe want the poagulable part of milk, which feems to mil [ 97 J MI L XLlik. to be of animal nature, approaching to that of the coagulable lymph of the blood. Milk, then, feems to be of an intermediate nature, between chyle taken up from the intellines and the fully elaborated animal fluid. Its contents are of three kinds : i ft, An oily part, which, whatever may be faid concerning the origin of other oils in the body, is certainly immediately derived from the oil of the vegetables taken in j as with thefe it agrees very exa&ly in its nature, and would entirely, if we could feparate it fully from the coagulable part. Another mark of their agreement is the feparability, which proves that the mixture has been lately attempt¬ ed, but not fully performed. 2dly, Befides this oily, there is a proper coagulable part : And, 3diy, Much water accompanies both, in which there is diffolved a faline faccharine fubftance. Thefe three can be got feparate in cheefe, butter, and whey ; but never per- fedtly fo, a part of each being always blended with every other part. Nothing is more common, from what has been faid of its immediate nature, than to fuppofe that it re¬ quires no aflimilation; and hence has been deduced the reafon of its exhibition in the moft weakly ftate of the human body. But wherever we can examine milk, we always find that it coagulates, fuffers a decompo- fition, and becomes acefcent. Again, Infants, who feed entirely on milk, are always troubled with eruc¬ tations, which every body obferves are not of the fame quality with the food taken $ and therefore it appears, that, like all other food, milk turns naturally acefcent in the llomach, and only enters the chyle and blood in confequence of a new recompofition. It approaches then to the nature of vegetable aliment, but is not capable of its noxious vinous fermentation, and therefore has an advantage over it; neither from this quality, like animal food, is it heating in the ftomach, and produc¬ tive of fever ; though at the fame time, from its quan¬ tity of coagulable matter, it is more nourilhing than vegetables. Milk is the food moft univerfally fuited to all ages end ftates of the body ; but it feems chiefly defigned by nature as the food of infants. When animals are in the feetus ftate, their folids are a perfeft jelly, inca¬ pable of an aflimilatory pow'er. In fuch ftate nature has perfe&ly aftimilated food, as the albumen ovi in the oviparous, and in the viviparous animals certainly fomewhat of the fame kind, as it was neceffary the veffels Ihould be filled with fuch a fluid as would make w’ay for an after aflimilation. When the infant has attained a confiderable degree of firmnefs, as when it is feparated from the mother, yet fuch a degree of Weaknefs ftill remains as makes fomewhat of the fame indication neceffary ; it behoves the infant to have an alkalefcent food ready prepared, and at the fame time its noxious tendency to be avoided. Milk then is given, which is alkalefcent, and, at the fame time, has a fufficient quantity of acidity to corredft that alka- lefcency. As the body advances in growth, and the alkalefcent tendency is greater, the animal, to obviate that tendency, is led to take vegetable food, as more fuited to its ftrength of aflimilation. Dr Cullen obferves, that milk is fluted to almoft all temperame’Us ; and it is even fo to ftomachs difnofed Vol. XIV. Part I. to acefcency, more than thofe fubilances which have Milk, undergone the vinous fermentation ; nay, it even cures v the. heartburn, checks vinous fermentation, and pre¬ cipitates the lees, when, by renewal of fermentation, the wine happens to be fouled. It therefore very pro¬ perly accompanies a great deal of vegetable aliment : although fometimes its acefcency is troublefome, ei¬ ther from a large proportion taken in, or from the de¬ gree of it; for, according to certain unaccountable cir- cumftances, different acids are formed in the ftomach in different ftates of the body ; in a healthy body, e. g. a mild one j in the hypochondriac difeafe fometimes, one of a very acrid quality. When the acidity of milk is carried to a great degree, it may prove re¬ markably refrigerant, and occafion cold crudities, and the recurrence of intermittent fevers. To take the common notion of its paffing unchanged into the blood, it can fuffer no folution. But if we admit its coagulum in the ftomach, then it may be reckoned among foluble or infoluble foods, according as that coagulum is more or lefs tenacious. Formerly rennet, which is employed to coagulate milk, was thought an acid ; but, from late obfervations, it appears, that, if it be an acid, it is very different from other acids, and that its coagulum is ftronger than that produced by acids. It has been imagined, that a rennet is to be found in the ftomachs of all animals, which caufes coagulation of milk ; but according to Dr Cullen the coagulation of milk feems to be owing to a weak acid in the ftomach, the relicks of our vegetable food, inducing, in healthy perfons, a weak and foluble coagulum : but in different ftomachs this may be very different, in thefe becoming heavy and lefs loluble food, and fometimes even eva¬ cuated in a coagulated undiffolved ftate both by fto* mach and ftool. As milk is acefcent, it may be rendered fometimes purgative by mixing with the bile ; and fome examples of this have been remarked. More commonly, how¬ ever, it is reckoned among thofe foods which occalion coftivenefs. Hoffman, in his experiments on milk, found that all kinds of it contained much water ; and when this was diflipated, found the refiduums very different in their folubility. But we muft not thence conclude, that the fame infolubjlky takes place in the ftomach • for extrafts made from vegetables with water are often very infoluble fubftances, and hardly diftulible through water itfelf: therefore, in Hoffman’s extra&s, if we may fo call them, of milk, fomewhat of the fame kind might have appeared ; and thefe fubilances, which in their natural ftate were not fo, might appear very in- foluble. .However, we may allow that milk is always ‘ fomehow infoluble in the inteftines, as it is of a drying nature, and as cheefe, &c. is very coftive. And this effea {hows that milk is always coagulated in the fto¬ mach ; for if it remained fluid, no faeces would be produced,,whereas fometimes very hard ones are ob- ferved. In the blood veffels, from its animal nature, it may be confidered as nutritious; but when we con- fider its vegetable contents, and acefcency in the prim* viae, we find that, like animal food, it does not excite that degree of fever in the time of digeftion, and that from its acefcency it will .refill putrefadion. Hence its ufe in beclic fevers, which, whatever be their caufe, ^ appear M I L r 93 ] M I L Milk. appear only to be exacerbations of natural feverUb pa- roxyfms, which occur tvvice.every day, commonly af¬ ter meals, and at night. To obviate thefe, therefore, we give fuch an aliment as produces the leaf! exacer¬ bation of thefe fevers : and of this nature is milk, on account of its acefcent vegetable nature. There appears alfo fomevvhat peculiar to milk, which requires only a fmall exertion of the animal powers in order to its aflimilation 5 and befides, in hedtic com¬ plaints there is wanted an oily, bland food, approach¬ ing to the animal nature ; fo that on ail thefe accounts piilk is a diet peculiarly adapted to them, and, in ge¬ neral, to mod convtilefcents, and to thofe of inflam¬ matory temperaments. So far of milk in general. We fhall now 1'peak of the particular kinds which are in common ufe. The milks of women, mares, and afles, agree very much in their qualities, being very dilute, having little folid contents, and, when evaporated to drynefs, having thefe very foluble, containing much faccharine matter, of a very ready acefcency, and, when coagulated, their coagulum being tender and eafily broke down. From this view they have lefs oil, and feem to have lefs coa- gulable matter than the reft. The milks of cows, Iheep, and goats, agree in op- poflte qualities to the three juft mentioned j but here there is fomevvhat more of gradation. Cows milk comes neareft to the former milk : goats milk is lefs fluid, lefs fweet, lefs flatulent, has the largeft propor¬ tion of infoluble part after coagulation, and indeed the largeft proportion of coagulable part *, its oily and co- agulable parts are not fpontaneoufly feparable, never throwing out a cream, or allowing butter to be rea¬ dily extradled from it. Hence the virtues of thefe milks are obvious, being more nouriftiing, though at the fame time lefs eaiily foluble in weak ftomachs, than the three firft, lefs acefcent than thefe, and fo more rarely laxative, and peculiarly fitted for the diet of conva- lefcents without fever. The three firft again are lefs nourifhing, more foluble, more laxative, as more acef¬ cent, and adapted to the convalefcents with fever. Thefe qualities, in particular milks, are confiderably diverfified by diffeient circumftances.' Firft, Different animals, living on the fame diet, give a confiderably different milk 3 for there feems to be fomething in the conftitution, abftrafting from the aliment, which con- ftitutes a cenfiderable diverfity of milk, not only in the fame fpecies of animals, but alfo in the fame animal, at different ages, and at different diftances after deli¬ very : this applies to the choice of nurfes. Secondly, Milk follows the nature of the aliment more than any other juice in the human body, being more or lefs fluid and dilute, more or Itfs folid and nourifiling, in pro¬ portion as thefe qualities are more or lefs in the ali¬ ment. The nature of the aliment differs according to its time of growth, e. g. old grafs being always found more nourifhing than young. Aliment, too, is always varied according to the feafon, as that is warm or dry, moift or cloudy. 1 he milk of each particular kind of animal is fitter for particular purpofes, when fed on proper food.— Thus the cow delights in the fucculent herbage of the vale : if the fheep be fed there he certainly rots, but on the higher and more dry fide of the mountain he feeds pleafantly and healthy; while the goat never Milk, flops near the bottom, but afeends to the craggy fum- w‘—v mit: and certainly the milks of thefe animals are al¬ ways bell on their proper foil, and that of goats is bell on a mountainous country. From a differtation of Linnaeus, we have many obfervations concerning the diverfity of plants on which each animal choofes to feed. All the Swedifli plants which could be colleft- ed together, were prefented alternately to domeftic animals, and then it appeared that the goat lived on the greateft variety, and even on many which were poi- fonous to the reft; that the cow chofe the firft fuccu¬ lent fhoots of the plant, and neglefted the fruftifica- tion 5 which laft was preferred by . the goat. Hence may be deduced rules concerning the paiiurage of dif¬ ferent animals ; e. g. Farmers find, that, in a paflure which was only fit to feed a certain number of fheep, an equal number ,of goats may be introduced, while the fheep are no Itfs nourifhed than before. It is not eafy to aflign the difference between milk frefh drawn and that detained in the open air for fome time : but certainly there is fome material one, other- wife nature univerfally would not have direfted infants to fucking j and indeed it feems, better than the other, fitted for digeflion and nourifhment. Pbyficians have fuppofed that this depended on the evaporation of fome fpt. reSior: but our author cannot conceive any fuch, except common water here j and befides, thefe volatile parts can hardly be nutritious. A more plaufible ac¬ count feems deducible from mixture : milk new drawn has been but lately mixed, and is expofed to fponta- neous feparation, a circumllance hurtful to digeflion j none of the parts being, by themfelves, fo eafily afli- milated as when they are all taken together. Hence, then, milk new drawn is more intimately blended, and therefore then is moft proper to the weakly and in¬ fants. Another difference in the ufe of milk expofed for fome time to the air, is taking it boiled or unboiled. Phyficians have generally recommended the former ; but the reafon is not eafily afligned. Perhaps it is this: Milk kept for fome time expofed to the air has gone fo far to a fpontaneous feparation j whereas the heat thoroughly blends the whole, and hence its refo- lution is not fo eafy in the flomach \ and thus boiled milk is more coftive than raw, and gives more faeces. Again, When milk is boiled, a confiderable quantity of air is detached, as appears from the froth on the fur- face ; and air is the chief intlrument of fermentation in bodies; fo that after this procefs it is not liable to acefcency : for thefe reafons it is proper for the robuft. and vigorous. Another difference of milk is, according as it is fluid or coagulated. The coagulated is of two kinds, as induced by rennet, or the natural acefcency of the milk. The former preparation makes the firmer and lefs eafily foluble coagulum j though, when taken with the whey unfeparated, it is lefs difficult of folution, though more fo than any other coagulum in the fame cafe. Many ^nations ufe the latter form, which is eafier foluble, but very much acefcent, and therefore, in point of folution, fhould be confined to the vigorous, in point of acefcency, to thofe who like on a alefeent fcod ; and in the laft cafe, the Laplanders ufe it as their chief acefcent MIL acefcent condiment. From the fame confiderations it ; is more cooling, and in its other effe£ts like all other acefcent vegetables. Milk by evaporation yields 'a fweet faline matter, of which Dr Lewis gives the following proportion : From which water extracted r 99 i M I L Twelve ounces of Cows milk Goats milk Human milk Afles milk Left of dry matter 13 drachms. a fweet faline fubftance a- mounting to 14- drachms. The faline fubftance extracted from affes milk was white, and fweet as fugar j thofe of the others brown or yellow, and confiderably lefs fweet that from cows milk had the leaft fweetnefs of any. On diftilling 12 quarts of milk in balneo marine, at leaft nine quarts of pure phlegm were obtained ; the liquor which afterwards arofe was acidulous, and by degrees grew fenfibly more and more acid as the di- ftillation was continued. After this came over a little fpirit, and at laft, an empyreumatic oil. The remain¬ ing folid matter adhered to the bottom of the retort, in the form of elegant fhining black flowers, which being calcined and elixated yielded a portion of fixed alkaline fait. Milk fet in a warm place, throws up to the furface an undluous cream, from which, by agitation, the but¬ ter is eafily feparated. The addition of alkaline falts prevents this (eparation, not (as fome have fuppofed) by abforbing an acid from the milk, but by virtue of their property of intimately uniting oily bodies with watery liquors. Sugar, another grand intermedium betwixt oils and water, has this effedt in a gre'ater degree, though that concrete is by no means alkaline, or an ab- forbent of acids. The fweet faccharine part of the milk remains dif- folved in the whey after the feparation of the curd or cheefy matter, and may be collefted from it in a white cryftalline form, by boiling the whey till all remains of the curdled fubftance have fallen to the bottom j then filtering, evaporating it to a due confiftence, fet- ting it to ftioot, and purifying the cryftals by folution in water and a fecond cryftallization. Much has been faid of the medicinal virtues of this fugar of milk, but it does not feem to have any confiderable ones : It is from cows milk that it has been generally prepared } and the cryftals obtained from this kind of milk have but little fweetnefs. When milk is fuffered to coagulate fpontaneoufly, the whey proves acid, and on Handing grows more and more fo till the putrefa&ive ftate commences. Sour whey is ufed as an acid, preferably to the direftly vegetable or the mineral acids, in fome of the che¬ mical arts; as for diffolving iron in order to the ftain- ing of linen and leather. This acid was commonly made ufe of in the bleaching of linen, for diffolving and extrading the earthy particles left in the cloth by the alkaline falts and lime employed for cleanfing and whitening it. Butter milk is preferred to plain four milk or four whey : This laft is fuppofed to give the cloth a yellow7 colour. Dr Home, in his ingenious treatife on this fubjed, recommends wrater acidulated with fulphuric acid (in the proportion of about half an ounce, or at moft three quarters of an ounce, to a gal¬ lon), as preferable in many refpeds to the acid of milk, or of the more diredly vegetable fubftances. He obferves, that the latter are often difficultly pro¬ curable, abound with oleaginous particles, and haften to corruption ; whilft the vitriolic acid is cheap, and pure, and indifpofed to putrefy : That milk takes five days to perform its office, whilft the vitriolic acid does it in as many hours, perhaps in as many minutes: That this acid contributes alfo to whiten the cloth, and does not make it weaker though the cloth be kept in it for months. He finds, that acids as well as al¬ kalies, extrad an oily matter from the cloth, and lofe their acidity and alkalicity. Since this treatife ap¬ peared, the ufe of four milk is very generally fuper- feded by oil of vitriol. It is obfervable, that affes milk is greatly difpofed, on (landing for a little time, to become thick and ropy. In the Breflaw colledion for the year 17 20, there is a remarkable account of milk (which probably was that of the afs) grown fo thick and tenacious as to be drawn out into long firings, which, when dried, were quite brittle. New cows milk, fuffered to ftand for fome days on the leaves of butterwort or fun-dew, becomes uniformly thick, flippery, and coherent, and of an agreeable fweet tafte, without any feparation of its parts. Freftr milk, added to this, is thickened in the fame manner, and this fucceffively. In fome parts of Sweden, as we are informed in the Swedifh Memoirs, milk is thus prepared for food. New milk has a degree of glutinous quality, fo as to be ufed for joining broken ftone ware. There is a far greater tenacity in cheefe properly prepared. Milk, when examined by a microfcope, appears compofed of numerous globules fwimming in a tranf- parent fluid. It boils in nearly the fame degree of heat with common water j fome forts rather fooner, and fome a little later : after boiling, it is lefs dif¬ pofed to grow four than in its natural ftate. It is coagulated by acids both mineral and vegetable, and by alkalies both fixed and volatile. The coagulum made by acids falls to the bottom of the ferum ; that made by alkalies fwims on the furface, commonly forming (efpecially with volatile alkalies) a thick coriaceous Ikin. The ferum, wdth alkalies, proves green or fa¬ mous •, with acids, it differs little in appearance from the whey that feparates fpontaneoufly. The coagulum formed by acids is diffolved by alkalies, and that formed by alkalies is rediffolved by acids ; but the milk does not in either cafe refume its original pro¬ perties. It is coagulated by moft of the middle falts, whofe bafis is an earth or a metallic body 5 as folution of alum, fixed fal ammoniac, fugar of lead, green and blue vitriol 5 but not by the chalybeate or purging mineral waters, nor by the bitter fait extradled from the purging waters. Among the neutral falts that have been tried, there is not one that produces any coagulation. They all dilute the milk, and make it lefs difpofed to coagulate with acids or alkalies : Nitre feems to have this effedt in a greater degree than the clher neutral falts. It is inftantly coagulated by highly N 2 redlified MIL r 100 ] MIL Milk, rectified fplrit of wine, but fcarcely by a phlegmatic v fpirit. It does not mingle with exprefl'ed oils. All the coagula are diffolved by gall. It has generally been fuppofed by medical authors, that the milk of animals is of the fame nature with chyle, and that the human milk always coagulates in the ftomach of infants ; but in a late differtation upon the fubjeil by Mr Clarke, member of the Royal Irilh Academy, we find both thefe pofitions controverted. According to him, wTomen’s milk, in a healthy ftate, con¬ tains no coagulable, mucilaginous, or cheefy principle, in its compofition ; or it contains fo little, that it can¬ not admit of any fenfible proof. Dr Rutty ftates, that it does not afford even a fixth part of the curd which is yielded by cows milk ; and Dr Young denies that Irijb Tranf. h is at all coagulable either by rennets or acids. This for 1788. is confirmed by Dr Ferris, who in 1782 gained the Har- veian prize medal at Edinburgh by a differtation up¬ on milk. Mr Clarke informs us, that he has made a vail number of experiments upon women’s milk with a view to determine this point. He made ufe of ar¬ dent fpirits, all the different acids, infufions of infants ftomachs, and procured the milk of a great many dif¬ ferent women} but in no inftance, excepting one or two, did he perceive any thing like curd. This took, place in confequence of a fpontaneous acefcency } and only a fmall quantity of foft flaky matter was formed, which floated in the ferum. This he looked upon to be a morbid appearance. The general opinion that women’s milk is coagu¬ lable has arifen from a Angle circumftance, viz. that infants frequently vomit the milk they fuck in a ftate of apparent coagulation. This greatly perplexed Dr Young} who, after having tried in vain to coagulate human milk artificially, concluded, that the procefs took place fpontaneoufly in the ftomach} and that it would always do fo if the milk were allowed to re¬ main in a degree of heat equal to about 96 degrees of Fahrenheit. Mr Clarke took equal quantities of three different kinds of milk, and put them into bottles llightly corked, and thefe bottles into w'ater, the tem¬ perature of which was kept up by a fpirit of wine lamp as near as poffible to 96® of Fahrenheit: but af¬ ter frequently examining each bottle during the courfe of the experiment, at the expiration of feveral hours there was not the fmalleft tendency towards coagula¬ tion to be perceived in any of them ; the cream was only thrown to the furface in a thick and adhefive form, and entirely feparated from the fluid below, which had fomething of a gray and wheyifli appear¬ ance. As the matter vomited by infants is fometimes more adhefive than we can fuppofe crearn to be, Mr Clarke fuppofed that the curd might be fo entangled , with the cream, as to be with difficulty feparated from it } but having collefled a quantity of rich cream from the milk of different women, he repeated the experi¬ ment with precifely the fame event,, not being able in any one inftance to produce the fmalleft quantity of curd. To determine, however, wffat effefls might be produced upon milk by the ftomach of an infant, Mr Clarke made the following experiment: Having taken out the ftomach of a foetus which had been deprived of life by the ufe of inftruments, he infufed it in a fmall quantity of hot water, fo as to make a ftrong hafufiQn, He added a tea-fpoonful of this infufion to equal quantities of cows and human milk 5 the confe- quence of which was, that the cow’s milk was firmly coagulated in a ftiort time, but tbe-human milk was not altered in the leaft } neither was the leaft coagula¬ tion produced by adding a fecond and third fpoonfuF to the human milk. “ Upon the whole, then, (fays Mr Clarke), I am perfuaded it will be found, that hu¬ man milk, in an healthy ftate, contains little or no curd, and that the general opinion of its nature and proper¬ ties is founded upon fallacious analogy and fuperficial obfervations made on the matter vomited by infants. We may prefume, that the cream of women’s milk, by its inferior fpecific gravity, will fwim on the furface of the contents of the ftomach} and being of an oily nature, that it will be of more difficult digeftion than any other conftituent part of milk. When an infant then fucks very plentifully, fo as to over-diftend the ftomach, or labours under any weaknels in the powers- of digeftion, it cannot appear unreafonable to fuppofe, that the cream ftiall be firft reje£ted by vomiting. Analogous to this, we know that adults affedled wdth dyfpepfia often bring up greafy fluids from the fto¬ mach by eru&ation, and this efpecially after eating fat meat. We have, in fome inftances, known this to blaze when throwm into the fire like fpirit of wine or oil.” Our author derives a confirmation of his opinion from the following obfervation, viz. that curds vomited by infants of a few days old are yellow, while they become-, white in a fortnight or three weeks.. This he accounts for from the yellow colour of the cream thrown up by- the milk of fcvomen during the firft four or five days af¬ ter delivery. Mr Clarke likewife controverts that common opi¬ nion of the human milk being fo prone to acidity, that a great number of the difeafes of children are to be accounted for from that principle. “ Whoever (fays he) takes the trouble of attentively comparing human milk with that of ruminant animals, will foon find it to be much lefs prone to run into the acefcent or acid procefs. I have very often expofed equal quancities- of human and cows milk in degrees of temperature, varying from the common fummer heat, or 65°, to ioo° } and I have conftantly found that cows milk acquires a greater degree of acidity in 36 hours than the human did in-many days: cows milk becomes offenfively pu¬ trid in four or five days} a change which healthy hu¬ man milk, expofed in the fame manner, will not un¬ dergo in many wrecks, nay, fometimes in many months. I once kept a few ounces of a nurfe’s milk, delivered about fix or feven days, for more than two years in a bottle moderately corked. It flood on the chimney- piece, and was frequently opened to be examined. At the end of this period it fliow’ed evident marks of mo¬ derate acidity, wffiether examined by the tafte, fmell, or paper ftained with vegetable blues or purples} the latter it changed to a florid red colour, whereas cows- milk kept a few days changed the colour of the fame paper to a green, thereby clearly {bowing its putrefcent tendency.” Our author next goes on to confider of the proba¬ bility there is of milk becoming fo frequently and ftrongly acid as to occafion moft of the difeafes of in¬ fants. He begins with an attempt to ffiow that the phenomena commonly looked upon to be indications- of acrimony are by no means certain. Curdled milk. ^ has,. MIL f 10 Mtlk. Kas already been fliown to be no fign of acidity j and 1 ' other appearance, which has commonly^ been thought to be fo certain, viz. green faeces, is, in the opinion of Mr Clarke, equally fallacious. In fupport of this he quotes a letter from Dr Sydenham to_Dr Cole ; in which he fays, that the green matter vomited by hyfterical women is not any proof of acrid humours being the caufe of that difeafe, for fea-fick people do the fame. The opinion of green faeces being an.effedt of acidity, proceeds upon the fuppolition that a mixture of bile with an acid produces a green colour > but it is found, that the vegetable acid, which only can exiftdn the human body, is unable to produce this change or co¬ lour, though it can be effeded by .the ftrong mineral acids. As nothing equivalent to any of thefe acids can be fuppofed to exift in the bowels of infants, we mu ft therefore take fome other method of accounting for the green faeces frequently evacuated by them. \Vhy ftrould four milk, granting its exiftence, give rife to thtm in infants and not in adults ? Have butter milk, fummer fruits of the moft acefcent kind, lemon or orange juice, always this effed in adults by their admixture with bile ? This is a queftion which, I believe, cannot be. anfwered in the affirmative.” On the whole, Dr Clarke confiders the difeafe of aci¬ dity in the bowels, though fo frequently^ mentioned, to be by no means common. He owns indeed, that it may fometimes occur in infancy as well as in adults, from weaknefs of the ftomach, coftivenefs, or improper food 5 and an indubitable evidence is afforded by faeces which ftain the blue or purple colour of vegetables to a red, though nothing can be inferred with certainty from the colour or fmell. The dodor next proceed* to ftate fereral reafons- for his opinion, that the greater number of infantile difeafes are. not owing to acidity j i. Women’s milk in a healthy ftate' contains little or no coagulable matter or curd. 2. It (hows lefs tendency out of the body to become acefcent than many other kinds of milk. 3. The appearances which have been generally fuppofed to charaderize its acidity do not afford fatif- fadory evidence of fuch a morbid caufe; 4. Granting this to be the cafe, we have plenty of.mild abforbents, capable of deftroying all the acid which can be fuppof¬ ed to be generated in the bowels of an infant j yet many children are obferved to die in confequence of. thefe difeafes fuppofed to arife from acidity. 5. Though the milk of all ruminant animals is of a much more acefcent nature than that of the human fpecies, yet the young of thefe animals never fuffer any thing like the difeafes attributed to acidity in infants. 6. Hif- tory informs us that whole nations ufe four curdled milk as a confiderable part of their food, without feel¬ ing any inconvenience^ which, however, muft have • been the cafe, if acidity in the ftomach were pro-, dudive of fuch deleterious effed as has been fup- pofed. The reafoning of Dr Clarke feems here to be very, plaufible, and nothing has as yet been offered to con- tradid it. The reviewers in taking notice of the trea-. tife only obferve, that the dodor’s pofitions. are fup- ported by great probability •, yet “ they have feen. them, or think they have feen them, contradided by the appearance of difeafes and the effeds of medi- I» J; M I Lr cines j” fo that they muft leave the fubjed to farther examination. In a memoir by Meffrs Parmentier and Deyeux, members of the royal college of pharmacy, &c. in Pa¬ ris, we have a great number of experiments on the milk of affes, cows, goats, fheep, and mares, as well as women. The experiments on cows milk, were made with a view to determine whether any change was made in the milk by the different kinds of food eaten by the animal. For this purpofe fome were fed with < the leaves of mai'ze or Turkey wheat *, fome with cab¬ bage •, others with fmall potatoes j and others with common grafs. The milk of thofe fed with the maize or Turkey wheat was extremely fweet •, that from the potatoes and common grafs much more ferous and in- fipid j and that from the cabbages the moft difagreeable of all. By diftillation only eight ounces of a colour- lefs fluid were obtained from as many pounds of each of thefe milks j which from thofe who fed upon grafs had an aromatic flavour j a difagreeable one from cab¬ bage j and none at all from the potatoes and 1 urkey wheat. This liquid became fetid in the fpace of a month, whatever, fubftance the-animal had been fed with,- acquiring at the fame time a vifcidity and be¬ coming turbid j that from cabbage generally, but not al¬ ways, becoming firft putrid. All of them feparated a filamentous matter, and became clear on being expofed to the heat of 250 of Reaumur’s thermometer. In the refiduums of the diftillation no difference whatever could be perceived. As the only difference therefore exifting in cows milk lies in the volatile part, our au¬ thors conclude, that it is improper to boil milk either for common or medicinal purpofes. Phey obferved al- fo that any fudden change of food, even from a worfe - to a better kind was attended by a very remarkable di¬ minution in the quantity of milk. All the refiduums of the diftillations yielded, in a ftrong fire, a yellow oil. and acid, a thick and black empyreumatic oil, a volatile alkali, and towards the end a quantity of inflammable air, and at laft a coal remained containing fome fixed alkali with muriatic acid. On agitating in long bottles the creams from the milk of cows fed with different fubftanqes, all of them were formed into a kind of half-made butter; of which that formed from the milk from maize was white, firm, and infipid ; that from potatoes was fofter and more pinguedinous j but that from common grafs was the beft of alh Cabbage, as in other cafes, gave a ftrong • tafte. In the courfe of their experiments, it was endeavour¬ ed to determine whether butter is adlually contained in the cream, or whether it be a chemical produ&ion of the operation of churning. They could not find any reafon abfolutely fatisfaftory on either fide, but incline to the latter opinion ; becaufe when cream is allowed to remain among the milk, and the whole curdled promif- cuoufly, only fat cheefe, without any butter, is produ¬ ced, The oily parts cannot be feparated into butter ei¬ ther by acids or any other means than churning : even the artificial mixture of oil with the cream is infufficient for the purpofe. The ferum of milk was reduced by filtration to a clear and pellucid liquor and, by mixture with fixed - alkali, depofited a portion of cheefy matter which had bees-.-- , Milk. M 'k- been diilalved in the whey, fo found in this liquor. In their experiments upon the milk of various ani- m?Js, it was found that the milk of affes yielded by diftillation an infipid liquor, and depofited a liquor iirnikr to the lymph of cows milk. It is coagulated ky the acids, but not into an uniform mafs ; ex- lubiting only the appearance of didindt ilocculi. It affords but little cream, which is converted with dif¬ ficulty into a loft butter that foon becomes rancid. It has but a fmal! quantity of faccharine particles, and thefe are often mixed with muriatic felenite and com¬ mon fait. Goats milk has a thick cream, and agree¬ able to the date y and the milk itfelf may be preferved longer in a found (late than any other fpecies, the icum on its furface being naturally convertible into palatable cheefe. It is ealily made into firm butter, which does not loon become rancid, and has a good flavour. 1 he butter milk contains a large quantity of cheefy matter, which readily coagulates; but has ftjll Id's faccharine matter than that of affes. Sheeps milk can fcarce be difiinguilhed from that of a cow, and ea- idy parts with its cream by Handing. It is of a yellow colour, an agreeable flavour, and yields a great propor¬ tion of butter , but this is not fohd, and foon becomes rancid. Mares milk is the molt infipid and lead nutri¬ tious of any 5 notwithftanding which it has been much recommended for weak and confumptive patients : in which cafes it is probable that it proves efficacious by being more confonant than any other to the debilitated powers of digeftioq. It boils with a fmaller fire than nny other kind of milk, is eafily coagulated, and the diftiiled water does not foon change its nature. It has but a imall quantity of cheefy matter, and very few oily particles : the cream cannot be made into butter ; and the whey contains about as much fugar as cows or goats milk. In this memoir our authors remark, that in order to augment the quantity, as well as to improve the qua¬ lity, of the milk of animals, they fliould be well fed, their Halls kept clean, and their litter frequently renew¬ ed ; they fliould be milked at ftated hours, but not drained : great attention fhould alfo be paid to the breed ; becaufe inferior cattle are maintained at as great expence as the moft valuable kinds. No change ought to be made in the food 5 though if the milk be employed fo^ medicinal purpofes, it may be improv¬ ed by a proper mixture of herbs, &c. In their experiments on women’s milk, Meflrs Par- mentier and Deyeux differ foraewhat from Dr Clarke. They firft tried the milk of a woman who had been delivered four months ; and obferved, that after the cream had been feparated the other part appeared of a more perfeft white, and .hat it could not be coa¬ gulated either by vinegar or mineral acids ; which they attributed to a fuperabundance of ferum. But they found that in proportion to .the age of the milk k was found to be more eafily coaguiable ; and this W’as confirmed by experiments made upon the milk of 2r3 nurles. Its coagulability was not increafed by heat. 1 he cream, by agitation, formed a vifeid unc¬ tuous matter, but could not be changed into perfect butter : but they found that it was extremely difficult to determine the proportions of the various compo¬ nent parts in human milk, as it differs remarkably, M I L not only in different fubje&s, but in the fame fubjeft at different times. In a nurfe aged about 32 years who was extremely fubjeft to nervous affections, the milk was one day found almoft quite colourlefs and tranfparent. In two hours after, a fecond quantity drawn from the hreaft was vifeid like the white of an egg. It became whiter in a fliort time, but dia not recover its natural colour before the evening. It was afterwards found that thefe changes ivere oceationed by her having fome violent hyfteric fits in the mean time. Sugar of Milk. Different methods have been pro- poled for obtaining the fugar of milk. The following is an account of a method ufed by fome of the Tartar nations of prtferving their milk by means of froft; : in which operation great quantities of the fugar of milk are accidentally formed. The account was given by Mr Fahrig of Peterfburgb, who undertook a journey, by order of the academy of Peterffiurgh, among the Mogul tribes who inhabit the country beyond the lake Baikal, on the banks of the river Salenga. Thefe peo¬ ple allow their milk to freeze in large quantity in iron kettles} and, when it is perfectly congealed, they place them over a gentle fire to ("often the edges of the cake, after which it may be taken out with a wooden fpatula. They commence thefe operations fit the beginning of the cold, when they have milk in the greateft abundance y after which it-may be pre¬ ferved with great eafe throughout the whole winter. Mr Fahrig having frequent opportunities of feeing thefe cakes, foon obferved, that the furface of them was covered to a confiderable depth with a farinaceous powder y and having eftablhhed a dairy upon the fame plan with thofe of_ the Moguls, he'found the fame thing take piace with himfelf. I his powder was ex¬ tremely fweet, and he received platefuls of it from the natives, who ufed it in their food, and fweetened their other viftuals with it. Having caufed a number of cakes of frozen milk to be conveyed to the top of his houfe, where they were diredtly expofed to the violent cold, he found that the feparation of the faccharine powder was ' greatly promoted by this means. He feraped the cakes every week to the depth of two inches, and afterwards fpread out the powder upon an earthen plate in order to deftroy the .remains of moif- ture which might have prevented it from keeping for any length of time. When expofed in this manner it had a very agreeable and frrong faccharine tafte ; dfffolved in warm water y and when flrongly ftirred by means of a chocolate flick, would at all times produce an excel¬ lent and well tafted milk. Raw milk affords a much larger quantity of this faccharine matter than fuch as has been boiled, or which has had the cream taken off it. Neither muff the milk be fuddenly expofed to the cold before it has lofl its natural heat ; for the fudden contaft or the cold drives all the cheefy and fat part towards the middle, while the external parts confift of little ehe than water. In order to allow7 the parts of the milk to be all properly mixed together, Mr Fahrig allowed the milk when newly taken from the cows to cool, and then poured it out into (hallow kettles. Our author is of opinion that this method of making milk w7ould be of great fervice to navigators to fup- piy themielves with milk during long fea voyages: and he The fugar of milk was al- M I L [ 103 ] MIL f,e aflures us, from his own experience, that it will always fucceed, if proper attention be paid to it. He is of opinion, however, that all countries are not equally proper for the preparation of this faccharine matter : and indeed this feems very evidently to be the cafe, as the procefs appears to be a crydaliization of the faccharine parts of the milk, and a feparation of them from the aqueous ones by means of extreme cold. The country in which he made the experiments is one of the moft elevated in all Alia ; and fo cold, that, though it lies only in the 50th degree of north latitude, its rivers are frozen up for fix months of the year. A very dry cold wind alto prevails throughout almofl: the whole year j and the dry winds generally come from the north, being almoft always preceded by a warm wind from the fouth, which bloivs for fome time. The dry rarefied air increafes the eva¬ poration from the ice cakes, and leaves nothing but the faccharine or pure conflituent parts of the milk, which with the addition of tvater can always recom- pofe the fluid. Milk, in the wine trade. The coopers know very well the ufe of Ikimmed milk, which makes an inno¬ cent and efficacious forcing for the fining down of all white wines, arracks, and fmall fpirits ; but is by no means to be ufed for red wines, becaufe it difcharges their colour. Thus, if a few quarts of well fkimmed milk be put into a hoglhead of red wine, it will foon precipitate the greater part ot the colour, and leave the whole nearly white : and this is of known' ufe in the turning of red wines, when pricked, into white ; in which a linall degree of acidity is not lb much per¬ ceived. Milk is, from this quality of difcharging colour from wines, of ufe alfo to the wine coopers, for the whiten¬ ing of wines that have acquired a browm colour from the calk, or from having been haftily boiled before fermenting • for the addition of a little Ikimmed milk, in thele cafes, precipitates the brown colour, and leaves the wines almoft: limpid, or of what they call a water whitenefs, which is much coveted abroad in wines as well as in brandies. Milk of Lime; Milk of Sulphur. The name of milk is given to fubftances very different from milk properly fo called, and which referable milk only in colour. Such is water in which quicklime has been flaked, which acquires a whitenefs from the fmall particles of the lime being fjfpended in it, and has hence been called the milk of lime. Such alfo is the folution of liver of fulphur, when an acid is mixed with it, by which white particles of fuluhur are made to float in the liquor. Milk of Vegetables. For the fame reafon that milk of animals may be confidered as a true animal eraul- fion, the emulfive liquors of vegetables may be called vegetable milks. Accordingly erauliicns made with al¬ monds are commonly called milk of almonds. But be- fides this vegetable milk, which is in feme meafere ar¬ tificial^ many plants and trees contain naturally a large quantity of emulfive or milky juices. Such are lettuce, fpurge, fig tree, and the tree which furnifhes the elaf- tic American refin. The milky juices obtained from all thefe vegetables derive their whitenefs from an oily matter, mixed and undiffolved in a watery or mucila¬ ginous liquor. Moft refinous gums were original!)? fuch milky juices, which afterwards become folid the evaporation of their more fluid and volatile parts. MiLK-Fcver. See Medicine Index. MiiKr-Hedge, the Englilh name of a fhrub growing on the coaft of Coromandel, where it is ufed for hedg¬ ing. The whole fhrub grows very bufliy, wuth numer¬ ous eredt branches, which are compofed of cylindrical joints as thick as a tobacco pipe, of a green colour, and from three to fix inches long : the joints are thick¬ er than the other parts, but always give way firft on any accidental violence offered to the plant. When broken it yields a milk of an excefiively cauftic quality, which blifters any part of the fkin it touches. When the joints are broken off at each end, the tube then contains but very little milk. In this ftate Mr Ives ventured to touch it with his tongue, and found it a little fweet. In the hedges it is feldom very woody ; but when it is, the wood is very folid, and the bark gray and cracked. This plant, he infoims us, has acquired great reputation in curing the venereal dileafe, on the following account: A poor Portuguefe woman, the eldcft female of her family, had wrought furptifing cures in the moft inve¬ terate venereal diiorders, even fuch as the European phyficians had pronounced incurable. Thefe fafts be¬ came fo notorious, that the fervants of the Company, and efpecially their furgeons, were induced to offer her a very conffderable premium for a difeovery of the me¬ dicine ; but (lie always refufed to comply, giving for a rcafon, that while it remained a fecret, it was a cer¬ tain proviiion for the maintenance of the family in the prefent as well as in future generations. On account of this denial the Englhh furgeons were fometimes at the pains to have her motions without doors carefully watched ; and as they were not able to difeover that fine ever gathered of any other plant or tree but this, they conjedured that the milk of this tree was the fpe- cilic employed. Mr Ives inquired at the black doc¬ tors concerning the virtues of this plant; who all a- greed, that it will cure the lues venerea, but differed as to the manner of adminiftering it ; fome faying that a joint of it fliould be eaten every morning j others that the milk only fhouM be dropped upon fugar j and then put into milk, oil, &c. and given daily to the pa¬ tient. Miiky IVay. See Astronomy Index. MILL, a machine for grinding corn, &c. of which there are various kinds, according to the different me¬ thods of applying the moving power j as water-mills, wind-mills, mills woiked by holies, &c. See Mecha¬ nics Index. The firft obvious method of reducing corn into flour for bread would be by the Ample expedient of pound¬ ing. And that was for ages the only one which was praclifed by the various defeendants of Adam, and ac¬ tually continued in uie among the Romans below the reign of Vefpafian. But the procefs was very early improved by the application of a grinding power, and the introduction of millflones. This, like moft of the common refinements in domeftic life, was pro¬ bably the invention of the antediluvian world, and cer¬ tainly praftifed in fome of the earlieft ages after it j and, like moft of them, it was equally known in the eaft and weft. Hence the Gauls and Britons appear familiarly acquainted with the ufe of hand-mills before the time of their fubmiukm to the Romans j the Britons particu- by Milky-wav, Mill. MIL [ 104 ] MIL Mill, larly difUnguiftiing them, as the Highlanders and we IJ' ^ diftinguilh them at prefent, by the fimple appellations of querns, comes, or Jlones. And to thefe the Romans added the very ufelul invention of water mills. For this difcovery the world is pretty certainly indebted to the genius of Italy •, and the machine was noi uncom¬ mon in the country at the conquelt of Lancalhire. This, therefore, the Romans would neceflariiy intro¬ duce, with their many other refinements among us. And that they a&ually did, the JBritifh appellation of a water-mill fully fuggefts of itfelf *, the mehn of the Wellh and Comilh, the mull, meill, and mehn of the Armoricans, and the Irilh mui'can and mililind, being all evidently derived from the Roman tnola and molen- dinum. The fubjeft Britons unxverlally adopted the •Roman name, but applied it, as we their fuccefibrs do, only to the Roman mill; and one of thefe was proba¬ bly ere£led at every ftadonaty city in the kingdom. Whitaker's One plainly was at Manchefier, ferving equally the Hift. of purpofes of the town and the accommodation of the MancieJ- garr5pon—And one alone would be fufficient, as the ufe of handmills remained very common in both, many having been found about the fite of the flation particu¬ larly ; and the general practice having defcendeS a- tnong us nearly to the prefent period. Such it would be peculiarly neceflary to have in the camp, that the garrifon might be provided againfi: a liege. And the water-mill at Manchefter was fixed immediately below the CafUefield and the town, and on the channel of the Medlock. There, a little above the ancient ford, the fluice of it was accidentallr difcovered about 30 years ago. On the margin of Dyer’s croft, and oppolite to feme new conftruitions, the current of the river, acci¬ dentally fwelled with the rains, and obftrudted by a dam, broke down the northern bank, fwept away a large oak upon the edge of it, and difclofed a long tun¬ nel in the rock below*. This has been fince laid open in part with a fpade. It appeared entirely uncovered at the top, w*as about a yard in width, and another in depth, but gradually narrow*ed to the bottom. The tides lhowred everywhere the marks of the tool on the rock, and the courfe of it was parallel with the channel. It was bared by the flood about 25 yards only in length, but was evidently continued for feveral further ; hav¬ ing originally begun, as the nature of the ground evin¬ ces, juft above the large curve in the channel of the Medlock. For the firft five or fix centuries of the Roman ftate, there were no public bread bakers in the city of Rome. They were firft introduced into it from the eaft, at the conclufion of the w7ar wfith Perfeus, and about the year 167 before Chrift. And, towards the clofe of the firft century, the Roman families w7ere fupplied by them every morning wuth frelh loaves for breakfaft.— But the fame cuftom, which prevailed originally among the Romans and many other nations, has continued nearly to the prefent time among the Mancunians. The providing of bread for every family was left entirely to the atttention of the wmmen in it •, and it was baked upon ftones, which the Wellh denominate grei- diols and we gredles. It appears, however, from the kiln-burnt pottery which has been difcovered in the Britifh fepulchres, and from the Britilh appellation of an odijn or oven remaining among us at prefent, that furnaces for baking wTere generally known among the 1 original Britons. An odyn would, therefore, be ereft- ed at the manfion of each Britifh baron, for the ufe Vl'lftonc. of himfelf and his retainers. And, w hen he and they removed into the vicinity of a Roman ftation, the oven would be rebuilt wfith the manfion, and the public bakehoufe'S of our towns commence at the firft foun¬ dation of them. One bakehoufe would be conftrudfed, as w7e have prevkmfiy fhown one mill to have been fet ■up, for the public fervice of all the Mancunian families. One oven and one mill appear to have been equally eftablifhed in the town. And the inhabitants of it ap¬ pear immemori-ally accuftomed to bake at the one and grind at the other. Both, therefore, were in all pro¬ bability conftru&td at the firft introdu&ion of water¬ mills and ovens into the country. The great fimilarity of the appointments refers the confideration directly to one and the fame origin for them. And the gene¬ ral nature of all fuch inftitutions points immediately to the firft and aflual introduction of both. And, as the fame eftablifhments prevailed equally in other parts of the north, and pretty certainly obtained over all the ex¬ tent of Roman Britain, the fame erections were as certainly mad* at every ftationary town in the king¬ dom. MILL, John, a very learned divine, w*as born at Shap in Weftmorland, about the year 1645 ; and be¬ came a fervitor of Queen’s college, Oxford. On his entering into orders he became an eminent preacher, and w7as made prebendary of Exeter. In 1681, hfc was created doCtor of divinity \ about the fame time he was made chaplain in ordinary to King Charles II. and in 1685 he was eleCted principal of St Edmund’s hall in Oxford. His edition of the Greek Teitament, which will ever render his name memorable, was pub- liihed about a fortnight before his death, which hap¬ pened in June 1707. Dr Mills was employed 30 years in preparing this edition. MILLSTONE, the ftone by which corn is ground. —The millftones wfinch w7e find preferved from ancient times are all fmall, and very different from thole in ufe at prefent. Thoreihy mentions two or three fuch found in England, among other Roman antiquities, which w7ere but 20 inches broad *, and there is great reafon to believe that the Romans, as w7ell as the Egyptians of old, and the ancient Jews, did not em¬ ploy horfes, or wind, or water, as w7e do, to turn their mills, but made their Haves and captives of war do this laborious work : they were in this fervice placed behind thefe millftones, and pulhed them on with all their force. Sampfon, when a prifoner to the Philiftines, was treated no better, but was con¬ demned to the millftone in his prifon. The runner or leofe millftone, in this fort of grinding, was ufually very heavy for its fize, being as thick as broad. This is the millftone which is exprefsly prohibited in Scrip¬ ture to take in pledge, as lying loofe it w7as more eafily rermwed. The Talmudifts have a ftory, that the Chaldeans made the young men of the captivity carry millftones with them to Babylon, wfiiere there feems to have been a fcarcity at that time ; and hence, probably, their paraphrafe renders the text “ have borne the mills or millftones-,” which might thus be true in a literal fenfe. They have alfo a proverbial expreflion of a man with a millftone about his neck; which they ufe to exprefs a man under the fevereft ■ weight MIL [ jo? 1 . . MIL Millftone weight of affliction. This alfo plainly refers to this !! fmall fort of ftones. Millennium R/lCmJh Millstone, a (tone which has beeft claf- v fed among volcanic produ&s, on account of its appear¬ ance, which is a blackifh gray, porous, and very much refembling a lava of Mount Vefuvius. MILLENARIANS, or Chiliasts* a name given to thofe in the primitive ages, who believed that the faints will reign on earth with Chriit 1000 years. See Millennium. MILLENER, or Milliner, one who fells rib¬ bands and dreffes, particularly head dreffes for women j and who makes up thole dreffes. Of this word different etymologies have been given. It is not derived from the French. The French can¬ not exprefs the notion of milliner, otherwife than by the circumlocution marchand or marchande des modes. Neither is it derived from the Low Dutch language, the great, but negleded, magazine of the Anglo-Saxon. For Sewell, in his Diffionary Englilh and Dutch, i 708, defcribes rnillener to be “ en kraamer van lint en an- dere optonifelon, Franfche kraamer j” that is, “ a ped¬ lar who fells ribbands and other trimmings or ornaments^ a French pedlar.” Littleton, in his Englilh and Latin dictionary, pub- lilhed 1677, defines millener, “ a jack of all trades q. d. millenarins, or mille mercium venditor; that is, “ one who fells a thoufand different forts of things.” This etymology feems fanciful: But, if he rightly un- derftood the vulgar meaning of the word millener in his time, we muff hold that it then implied what is now termed “ a haberdaffter of fmall wares,” one who dealt in various articles of petty merchandife, and who did not make up the goods which he fold. Before Littleton’s time, however, a fomewhat nicer charafteriftic than feems compatible with his notion, appears to have belonged to them; for Shakefpeare, in his Henry IV. makes Hotfpur, when complaining of the daintinefs of a courtier, fay, “ He was perfumed like a milliner.” The faCl feems to be, that there were millen'ers of feveral kinds: as, horfe milleners, (for fo thofe perfons were called who make ornaments of coloured rvorffed for horfes); haberdafflers of fmall wares, the milleners of Littleton 5 and milleners fuch as thofe now pecu¬ liarly known by that name, whether male or female, and to whom Shakefpeare’s allufion feems molt appro¬ priate. Laflly, Dr Johnfon, in his dictionary, derives the word front milaner, an inhabitant of Milan, from whence people of this profeffion firft came, as a Lombard is a banker. MILLE passus, or Millia Pajfuum ; a very com¬ mon expreffion among the ancient Romans for a mea- fure of^diftance, commonly called a mile. Milliarium, rarely ufed. Which Hefychius made to confift of feven ftadia ; Plutarch, little fflort of eight} but many others, as Strabo and Polybius, make it juft eight ftadia. The reafop of this difference feems to be, that the former had a regard to the Grecian foot, which is greater than the Roman or Italic. This diftance is oftentimes called lapis, which fee. Each paffus con- fifted of five feet (Columella). MILLENNIUM, “ a thoufand years}” generally Vol. XIV. Part I. employed to denote the thoufand years, during which, Millennmfn according to an ancient tradition in the church, ground-'' v ed on fome doubtful texts in the Apocalypfe and other Scriptures, our bleffed Saviour lhall reign with the faithful upon earth after the firft relurreClion, before the final completion of beatitude. Though there has been no age of the church in which the millennium was not admitted by individual divines of the firft eminence, it is yet evident from the writings of Eufebius, Irenaeus, Origen, and others among the ancients, as well as from the hiftories of Dupin, Mofiieim, and all the moderns, that it was never adopted by the whole church, or made an article of the eftabliftied creed in any nation. About the middle of the fourth century the Millen¬ nial held the following tenets : ift, That the city of Jerufalem (hould be rebuilt, and that the land of Judea fhould be the habitation of thofe who were to reign on earth 1000 years. 2dly, That the firft refurreftion was not to be confined to the martyrs } but that after the fall of Antichrift all the juft were to rife, and all that were on the earth were to continue for that fpace of time. 3dly, That Chrift (hall then come down from heaven, and Tae feen on earth, and reign there with his fer- vants. 4thly, That the faints during this period fnall enjoy all the delights of a terreftrial paradife. Thefe opinions Were founded upon feveral paffa- ges of Scripture, which the Millenarians among the fathers underftood in no other than a literal fenfe, but which the moderns, who hold that opinion, con- fider as partly literal and partly metaphorical. Of thefe paffages, that upon which the greateft itrefs has been laid, we believe to be the following :—“ And I faw an angel come down from heaven, having the key of the bottomlefs pit, and a great chain in his hand. And he laid hold on the dragon, that old fer- pent, which is the devil and Satan, and bound him a thoufand years, and call him intp the bottomlefs pit, and fhut him up, and fet a feal upon him, that he fhould deceive the nations no more till the thoufand years Ihould be fulfilled } and after that he muft be looled a little feafon. And I faw thrones, and they fat up¬ on them, and judgement w'as given unto them : and I faw7 the fouls of them that were beheaded for the witnefs of Jefus, and for the word of God, and which had not worfhipped the beaft, neither his image, nei¬ ther had received his mark upon their foreheads, or in their hands } and they -lived and reigned wdth Chrift a thoufand years. But the reft of the dead lived not again till the thoufand years were fnijhed. This is the firft refurreftion This paffage all the ancient * Rnm Millenarians took in a fenfe grofsly literal } and taught, x—5. that during the millennium the faints on earth were to enjoy every bodily delight. The moderns, on the other hand, confider the pow?er and pleafure of this kingdom as wholly fpiritual } and they reprefent them as not to commence till after the conffagration of the prefent earth. But that this laft fuppofition is a mif- take, the very next verfe except one allures us : for we are there told, that “ when the thoufand years are expired, Satan fhall be loofed out of his prifon, and fhall go out to deceive the nations which are in the four quarters of the earth;'" ?.nd we have no reafon to , O believe MIL [ i Millennium believe that lie will Irave fuch power or fuch liberty in '"’■“■"V"’"- “ the new heavens and the new earth wherein dwelleth righteoufneh.” For this and other reafons, which our limits will not permit us to enumerate, the mold judicious critics con¬ tend, that the prophecies of the millennium point, not to a refurredlion of martyrs and other juli men to reign with Chrift a thoufand years in a vilible kingdom upon earth, but to that Hate of the Chrillian church, which, lor a thoufand years before the general judgement, will be fo pure and fo widely extended, that, when compa¬ red with the Hate of the world in the ages preceding, it may, in the language of Scripture, be called a refur- reclion from the dead. In fupport ol this interpretation they quote twm paflages Irom St Paul, in which a con- verlion from Paganiim to ChriHianity, and a reforma¬ tion of life, is called a refurredlion irom the dead :— “ Neither yield ye your members as inHruments of un- righteoufnefs unto fin ; but yield yourfelves unto God * Rom. vi. as thofe that are alive from the dead * i” And again, 13. “ Wherefore he faith, AwTake thou that fieepefi, and f Eph. y. arfe from the dead, and Chrifi lhall give thee light f.” M- It is likewife to be obferved, that in ail the defcriptions of the relurredlion and future judgement which are given us at fuch length in the gofpels and epifiles, there is no mention made of a frjl zw& fecond refurredlion at the diitance of a thoufand years from each other. There is indeed an order in the re furred ion : for we f 1 Cor. are told that “ every man finall rife in his own order j xv. 23» Chrifi the firfi fruits, afterwards they that are ChriH’s at his coming, Sec.” But w^ere the millennarian hypo- thefis well founded, the words fiiould rather have run thus : “ Chrifi the firfi fruits, then the martyrs at his coining, and a thoufand years afterwards the refidue of mankind. Then cometh the end, &c.” Thefe arguments Hrongly incline us to believe, that by the reign of Chrifi and the faints for a thoufand years upon earh,. nothing more is meant, than that before the general judgement the Jew-s fiiould be con¬ verted, genuine Chrifiianity he diffufed through all na-. tions, and mankind enjoy that peace and happinefs which the faith and precepts of the gofpel are calcu¬ lated to confer on all by whom they are lincerely em¬ braced. Our Saviour’s own account of his religion is, that from a fmall beginning it will increafe to the full harveft. The millennium therefore is to be confidered as the full effedt of the Chri tian principles in the hearts of men, and over the whole wmrld ; and the divines who have treated of this fubjeit endeavour to prove, that this is to be expelled from the fa6ts which have already exifted, and from the importance of the Chri- fiian dodfrine. x. The gradual progrefs of Chrifiianity is no objec¬ tion to this faft. This is fimilar to the progrefs and advancement from lefs to greater perfedtion in every thing which pofiefies vegetable or animal life. The > Tame thing is obferved in the arts, in civilization, in focieties, and in individuals—and why ihould it not be admitted to have place in religion ? There is indeed a general principle on which a gradual progreffion, both in the natural and moral world, is founded. The Almighty never employs fupernatural means where the thing can be accomplifhed by thofe which are natural. 'This idea is of the moft general extent through the 16 ] MIL whole of the prefent fyftem of nature. The poflibiiity Millanniwa of another plan could eafily be admitted \ but in this cafe ^ J there would be a total alteration of every part of the works of God or of man that we are acquainted with. In the lame manner, if the religion of Chrifi had been irrefiftible, it would have totally altered its natural con- lequences. It was necefl'ary, thereiore, from the pre¬ fent condition of man, as an a6tive, intelligent, and ac¬ countable being, that means Ihould be employed j and wherever means are employed, the effects produced muft be gradual, and not infiantaneous. 2. I hough the progrefs of a divine revelation be gra¬ dual, yet it is to be expefted, from the wiidom and - compaffion of God, that it will Hill be advancing in the hearts of men, and over the world. In the firfi age of the church, the wmrd of God, fupported by miracles, and by the animated zeal of men who fpake what they faw and heard, grew and prevailed. In this cafe fupernatural means were neceffary, becaufe the preju¬ dices of the wmrld could not be lubdued without them. It was the firft watering of a plant which you after¬ wards leave to the dew'.of heaven. Miracles at the fame time were employed only as the means of convic¬ tion 5 and they were not continued, becaufe in this cafe they would have become a confiant and irrefifiibie principle, incompatible with the condition of man as a reafonable agent. After this power was withdrawn, there were many ages of ignorance and fuperftition in the Chrifiian church. But what is neceflary to be efiablifhed on this fu jedITs, not that the progrefs of Chrifiianity has never been inter;upted, but that on the whole it has been advancing. The effebls of this religion on mankind, in proportion as it was received, ^ were immediate and vifible : It dellroyed the grofs fu- perflition of idol worfiiip : it abolifhed the practice, which was general in the heathen world, of reducing to the loweft Hate of fervitude the greateft part of our brethren : it foftened the horrors of w ar, even w hen the vices of mankind made defence neceflary : it entered into focial and private life *, and taught men benevolence, humanity and mercy. It is in thefe biefied effedfs that we can obferve the progreis of Chriftianity even to this day. Superftition and idolatry wmre foon engrafted on the Hem w’hich our Saviour planted in the world ; but the fimplicity o‘ the gofpel has been gradually under¬ mining the fabric of fuperfiition ; and the men who arc moft nearly interefted in the deceit are now almoft alhamed to fiiow their faces in the caufe. The praeiice of flavery has, generally fpeaking, been extinguifhed in the Chrifiian world 5 yet the remains of it have been a difgrace to the Chrifiian name, and the profeffors of that religion have now begun to fee the inconfiftency. War is not only carried on with lefs animolity, and lefs havock of the human fpecies ; but men begin to culti¬ vate more generally, and to delight in, the arts of peace. The increafing fpirit of charity and benevo¬ lence, of w’hich it were eafy to give unexampled inftan- ces in the prefent age, is a decided proof of the increa¬ fing influence of Chriftianity. At the fame time, if, inftead of thefe general principles, we were to defeend to private examples of infidelity or of wickednefs, It would be eafy to bring proofs in fupport of an oppofite opinion : but the reafening would by no means be equally conclufive ; for if the general principles by which fociety is regulated be more liberal and merciful, it: MIL [ i Millennium it is evident that there is more goodnefs in a greater v number of the human race. Society is nothing more than a colleftion of individuals j and the general tone, efpecially when it is on the fide of virtue, which almoft in every inilance oppofes the defigns of leading and in- terefted men, is a certain evidence of the private fpirit. To fhow that this reformation is'connected with Cbri- ftianity, it is unnecefiary to fiate any comparifon be¬ tween the influence of heathen, and the influence of Chriflian principles : between civilization as depending on the powers of the human underftanding, and on the efficacy of the word of God. The whole- of this contro- verfy may be appealed to an obvious fadt, viz. that as any nation has come nearer to the fimplicity of the gof- pel in the ftandard of its worfhip, it has been more poflefled of thofe national virtues which we have afcribed to the influence of Chriftianity. This fadt is worth a thoufand volumes of fpeculation on this fub- jedt. 3. A revelation fandtioned by God, for a benevolent purpofe, will be expected to produce effedts correfpond- ing to the wifdom which gave it, and to the purpofe for which it is employed. It may be gradual ; but it will be increafing, and it muft increafe, to the full har- veft. He that has begun the good wmrk will alfo finith it. It is reafonable to expedt this illuttrious fuccfefs of the gofpel, both from the nature of the thing, and from the prophecies contained in the facred fcriptures. The precepts of the gofpel, in their genuine fenfe, are admirably calculated for the peace and welfare both of individuals and fociety. The greateil liberality of mind, the greateil: generofity of temper, the moft unbounded lore, and the greateft indifference to the accumulation of thus world’s property, if they glowed from breaft to breafl, and operated with equal force on all men, would be produdlive of equal good and happinefs to all. We are fcarcely able to perceive the force of this at firft view, becaufe the deceit and impofition which yet exifi. in the world, prevent the operation of the beft principles even in the bed hearts. But in proportion to the improvement of mankind, what is their real in- tereft, and what are the real otjedls of happinefs, will gradually unfold. The contempt of vice will be great¬ er in proportion to the fcarcity of it : for one villain gives countenance and fupport to another, juft as iron iharpeneth iron. This opens to our viewr another fadl connedled with the practice of Chriftianity, namely, that the hearer it arrives to its perfect ftate, it will be the more rapid in its'progrefs. The beauty of holinefs will be more vifible ; and, in the ftrong language of the prophet, “ the earth ffiall bring forth in one day, *If. IxvL.Si and a nation ffiall be born at once*.” This future perfedtion of the gofpel is confiftent with its nature and importance.—We can fcarcely believe that means fo admirably adapted to the reformation of mankind ffiould be without their effedt; and if the moft difficult part be already acccmplilhed, we have no reafon to ap¬ prehend that the fcheme wull not be completed. This fad! is alfo clearly the fubjedl of ancient prophecy. For t Ver. 12. “ thus faith the Lord f, I will extend peace to her like 23- a river, and the glory of the Gentiles like a flowing ftream. And it lliall come to pafs, from one fabbath to another, and from one new moon to another, {hall all fltflr come to worffiip before me, faith the Lord.”— “ Violence fliall be no more heard in thy land, wafting >7 ] MIL nor deftrudlion within thy border ; but thou (halt call Millennium thy walls falvation, and thy gates praife.” (If. lx. 18.). Without entering more minutely on the prophecy already quoted from chap. xx. of the book of the Re¬ velation, it is fufficient to obferve, that Dr Whitby, in his treatife on the millennium at the end of his commen¬ tary, proves, in the cleared manner, from the fpirit of the paffage and the fimilarity of the expreffions with thofe of other prophets, that it refers to a ftate of the church for a thoufand years, which ffiall be like life from the dead. The commencement of this period is connedled with two events : the fall of antichrift, and the converfion of the Jews. The latter of thefe events muft be confidered as a key to all the prophecies con¬ cerning the millennium. As the Jews were the ancient people of God, and as their converfion is to be the pre¬ vious ftep to the general knowledge of Chriftianity, the prophecies of the millennium have a chief relation to this important event. We have already obferved, that God never interpofes with miraculous power to produce what can be effedled by natural means 5 and from what we know of human nature, we cannot but perceive that the converfion of the Jews will powerfully operate to the general converfion of mankind. Freed from thofe pre¬ judices which now make them the objedls of hatred in all nations, and fired with that zeal by which new con¬ verts are always adfuated, they will preach the gofpel with a fervour of which we, who have long been blef- fed with its rays, can hardly form a conception 5 and, by their prefent difperfion over the whole earth, they will be enabled to adapt their inftrudlions to every in¬ dividual of the human race in the language of his fa¬ thers. Indeed, if they are not at fome future period to , be employed by Providence for this pivj pofe, it is. diffi¬ cult, if not impoffible, to give any reafon for their dif- perfed ftate and political exiftence. Juft now it muft be confeffed that they are the moft implacable enemies of the Chriflian name •, but their converfion is not on that account more unlikely or improbable than were events which have taken place of nearly equal importance a very few years ago. On the whole, the perfedion of Chriftianity is a dodrine of reafonable expedation to the church ", and it is impoffible for the advocates for natural religion to deny, that unlimited obedience to its precepts is confiftent with the pureft ftate of liberty and of happinefs. ihis is the only millennium which the prophets and apoftles, as we underftand them, pro- mife to the faints ; but as men figuring in the very firft ranks of learning have thought otherwife, we would not be too confident that our interpretation is juft.—Such of our readers as wiffi for further information, will find it in the works of Mr Mede, Billiop Newton, Dr Whit¬ by and Dr Gill ; and to thofe mafterly writers we refer them for that fatisfadion which in fuch an article as this cannot be given. MILLEPES, or WOOD louse ; a fpecies of Onis- cus. See Entomology Index. MILLEPORA, in Natural Hijlory, a name by which Linnaeus diftinguiffies that genus of lithophytes, of a hard ftrudure and full of holes, which are not ftel- lated or radiated, and whole animal is the hydra, in which it differs from the madrepora, and comprehend¬ ing 14 different fpecies. In the millepora, the animal which forms and inha¬ bits it occupies the lubftance •, and it is obferved that O 2 the MIL [ 108 ] MI L Millet the milleporfe grow upon one another; their little ani- ^ mals produce their fpawn ; wrhich attaching itfelf either ^ ° ' to the extremity of the body already formed, or un¬ derneath it, gives a different form to this produc¬ tion. Hence the various fliapes of the millepora, which is compofed of an infinite number of the cells of thofe little infe&s, which all together exhibit differ¬ ent figures, though every particular cellula has its effen- tial form, and the fame dimenfions, according to its own fpecies. MILLET. See Milium, Botany Index. MILLIARE, or Milliarium, a Roman mile, which confifted of I ooo paces, milie pajjus, whence the name. MILLIARIUM AUREUM, was a gilded pillar in the forum of Rome, at which all the highways of Italy met, as one common centre. From this pillar the miles were counted, and at the end of every mile a ftone was put down. The milliary column was erefled by Au- guftus Caefar, and, as we are informed by travellers, is Hill to be feen. MILLING of Cloth. See Fulling. MILLION, in Arithmetic, the fum of ten hundred thoufand, or a thoufand times a thoufand. See Arith¬ metic. MILLO, a part of Mount Zion at its extremity ; and therefore called Millo of the city of David (2 Chron. xxxii ), taken in with the wall that encom- paffed Mount Zion. Uncertain whether Beth Mitlo, (Judges ix. 20.) denotes a place ; if it did, it lay near $echem. MI LLOT, Claude Francis Xavier, of the French academy, was born at Befan^on, March 1726, and was for fome time a Jefuit. He was confecrated for the pulpit, and continued to preach after he left the fo- ciety : But the weaknefs of his voice, his timidity, and the awkwardnefs of his manner, not permitting him to continue in this profeffion, he relinquifhed it, although he had preached Advent fermons at Verfailles, and Lent fermons at Luneville. The marquis de Felino, minifter of Parma, inftituted an hiftorical clafs for the benefit of the young nobility ; and, at the defire of M. le Due de Nivernois, he gave the charge of it to the abbe Millot. The minilfer having occafioned a kind of rebellion among the people by fome innovations which he had made in the ftate, the abbe continued at¬ tached to the interefls of his patron, and would net de- fert him till the {form was blown over. When he was told that he would lofe his place by this condufl, he re¬ plied, “ My place is with a virtuous perfecuted man who has been my benefa∨ and that I (hall never lofe.” At length, having filled the hiftorical chair with great approbation, he returned to France, and was appointed preceptor to M. le Due d’Enghien. In this fituation he died, A. D. 1785, aged 59. The abbe Millot did not Ihine in company ; he was cold and re¬ ferred in his manner ; but every thing he faid was ju¬ dicious, and exactly in point.—D’Alembert faid, that of all his acquaintance the abbe Millot had the feweft prejudices and the leaft pretenfion. He compofed feve- ral works, which are digefted with great care, and written in a pure, fimple, and natural ftyle. ihe prin¬ cipal are, I. Elemens de PHiJIoire de France, depuis Clovis jufqid a Louis XIV. 3 vcls. in I 2mo. The au¬ thor, felecting the moft curious and important fafts, has fuppreffed every thing foreign to the fubjecl; and has Millotr not only arranged the materials in their proper order,, Mlio. but chofen them with the greateft judgement. Querlon 'r^ thought this the beft abridgement which we have of the hiftory of France, and preferred it to that of the prefi- dent Henault. 2. Elemens de CHi/loire d\A?iglcterre, depuis fon origine fous les Romains, jufqid a George II. 3 vols. 12mo. In this valuable abridgement, the au¬ thor fatisfies, without tiring, his readers. It is all that is neceflary for thofe wrho wilh to gain a general know¬ ledge of the Engliflr hiftory, wdthout entering minute¬ ly into its particular parts.—3. Elemens de PHijloire Univerfe/le, 9 vols. i2mo. A certain critic maintains, that this work is merely a counterfeit of Voltaire’s ge¬ neral hiftory. But this cenfure is altogether unjuft. The ancient hiftory in this work is wholly compofed by the abbe Millot; and, no lefs than the modern part, difeovers his abilities in the choice of fadts, in divefting them of ufelefs circumilances, in relating them without prejudice, and in adorning them with judicious reflec¬ tions. 4. L’HiJloire des Troubadours, 3 vols. i2mo, compiled from the manuferipts of M. de Saint Palaie. This work appears rather tedious, becaufe it treats of men almoft unknown, and moft of them deferving to be fo. What is there quoted from the Provencal poets is not at all interefting ; and, according to the obfervation of a man of wit, “ it ferves no purpofe to fearch curi- oufly into a heap of old ruins while w7e have modern palaces to engage our attention.” 5. Memoires Poli- tiques et Militaires, pourfervir a P Hi ft 0 ire de Louis XIV. et de Louis XV. compofed from original papers colleft- ed by Adrian Maurice due de Noailles, marftial of France, in 6 vols. 12mo. 6. The abbe Millot pub- liftied alfo feveral Difcourfes, in wdiich he difeufles a variety of philofophical queftions, with more ingenuity of argument than fire of expreffion ; and a tranflation of the moft feleft harangues in the Latin hiftorians ; of wdiich it has been remarked, as well as of the orations of the abbe d’Olivet, that they are coldly correft, and elegantly infipid. The charafter of the author, more prudent and circumfpeft than lively and animated, fel- dom elevated his imagination above a noble fimplicity without warmth, and a pure ftyle without oftentation. Some of the critics, however, have accufed him of de¬ clamation in fome parts of his hiftories, particularly in thofe parts wdnch concern the clergy. But, in our opi¬ nion, the word declamation is totally inapplicable to the writings of the abbe Millot. He flatters, it is true, neither priefts nor ftatefmen ; and he relates more inftances of vicious than of virtuous aflions, becaufe the one are infinitely more common than the other : But he relates them coldly ; and he appears to be guided more by fincerky and a love of truth, than by that par¬ tial philofophy which blames the Chriftian religion for thofe evils-which it condemns. MILO, a celebrated athlete of Crotona in Italy. His father’s name was Diotimus. Fie early accuftomed himfelf to carry the greateft; burdens, and by degrees became a prodigy of ftrength. It is faid that he car¬ ried on his fhoulders a young bullock, four years old, for above forty yards ; and afterwards killed it with one blow of his lift, and eat it up in one day. He was fe- ven times crowned at the Pythian games, and fix at the Olympian. Fie prefented himfelf a feventh time ; but no one had the courage or boidnefs to enter the lifts v againfL. MIL [ Milo. again ft him. He was one of the difciples of Pythago- ras • and to his uncommon ftrength, it is faid, the learned preceptor and his pupils owed their lile : The pillar which fupported the roof of the fchool fuddenly gave way 5 but Milo fupported the whole weight of the building, and gave the philofopher and his auditors time to efcape. In his old age, Milo attempted to pull up a tree by the roots, and break it. He partly effected it; but his ftrength being gradually exhaufted, the tree when half cleft re united, and his hands remained pinch¬ ed in the body of the tree. He was then alone ; and, being unable to difentangle himfelf, he was devoured by the wild beafts of the place, about 500 years before the Chriftian era. Milo, T. Annins, a native of Lanuvium, wlm at¬ tempted to obtain the confulihip at Rome by intrigue and feditious tumults. Clodius the tribune oppofed his views; yet Milo would have fucceeded but for the following event : As he was going into the country, at¬ tended by his wile and a numerous retinue of gladiators and fervants, he met on the Appian road his enemy Clodius, who was returning to Rome with three of his friends and fome domeftics completely armed.—-A quarrel arofe between the lervants. Milo fupported his attendants, and the difpute became general.— Ctodius received many fevere wounds, and was obliged to re¬ tire to a'neighbouring cottage. Milo purlued his ene¬ my in his retreat, and ordered his fervants to defpatch him. The body of the murdered tribune was carried to Rome, and expofed to public view. I he enemies of Milo inveighed bitterly againft the violence and bar¬ barity with which the facred perfon of a tribune nad been treated. Cicero undertook the defence ot Milo ; but the continual clamours of the friends of Clodius, and the fight of an armed foldiery, which furrounded the feat of judgement, fo terrified the orator, that he forgot the greateft part of his arguments, and the de¬ fence he made was weak and injudicious.—Milo was condemned, and bamfhed to MalTilia. Lucero ioon af¬ ter fent his exiled friend a copy of the oration which he had prepared for his defence, in the form in which we have it now and Milo, after he had read it, ex¬ claimed, 0 Cicero, hadjl thou fpchen before mij accufers in thefe terms, Milo would not be now eating Jigs at Marfeilles. The friendihip and cordiality of Cicero and Milo were the fruits of long intimacy and familiar in- tercourfe. It was to the fuccefsful labours of Milo that the orator was recalled from banilhment, and reftored to his friends. Milo, (anciently MelosJ an iftand in the Archipe¬ lago, about 50 miles in circumference, with a harbour, which is one of the largeft in the Mediterranean. The principal town is of the fame name as- the ifland, and was prettily built, but abominably nafty : the houfes are two ftories high, with flat roofs ; and are built with a fort of purnice ftone, which is hard, blackilh, and yet very light. This ifland was formerly rich and populous. From the earlieft times of antiquity it enjoyed pure liberty. Milo. 09 ] MI L The Athenians, not being able to perluade the Melians , to declare in their favour in the Peloponnefian war, made a defcent upon the ifland, and attacked them vi- goroufly. In two different expeditions they failed of their purpofe : but returning with more numerous forces, they laid fiege to Melos; and obliging the befieged to furrender at diferetion, put to the fword all the men who were able to bear arms. They fpared only the women and children, and thefe they earned into captivity. This aft of cruelty puts humanity to the blulh, and difgraces the Athenian name. But war was then carried on with a degree of wild rage, unex¬ ampled in the prefent times. Republics know not how to pardon, and always carry their vengeance to an extravagant height. When Lyfander, the Lacede¬ monian general, came to give law to the Athenians, he expelled the colony which they had fent to Melos, and re-eftablifhed the unfortunate remains of its original inhabitants. This ifland loft its liberty when Rome, afpiring to the empire of the world, conquered all the Hies of the Archipelago. In the partition of the empire, it fell to the ihare of the eaftern emperors, was governed by particular dukes, and was at laft conquered by Soli- man II. Since that period, it has groaned under the yoke of Turkifh defpotifm, and has loft its opulence and fplendour. At the commencement of the prefent century, it boafted of 17 churches and 11 chapels, and contained more than 20,000 inhabitants. It was very fertile in corn, wine, and fruits ; and the whole fpace from the town to the harbour, which is nearly two miles, was laid out in beautiful gardens. M. Tourne- fort, who viiited it in the year 1700, gives a fine de- feription of it. “ The earth, being conftantly warmed by fubterraneous fires, produced almolf without inter¬ ruption plenteous crops of corn, barley, cotton, ex- quifite wanes, and delicious melons. St Elias, the fineft monaftery in the ifland, and fituated on the moft ele¬ vated fpot, is encircled with orange, citron, cedar, and ' fig trees. Its gardens are watered by a copious fpring. Olive trees, of which there are but few in the other parts of the ifland, grow in great numbers around this monaftery. The adjacent vineyards afford excellent wine. In a word, all the produftions of the ifland are the very heft of their kinds ; its partridges, quails, kids, and lambs, are highly valued, and yet may be bought at a very cheap price.” Were M. Tournefort to return to Milo, M. Savary * * Letters an aflures us; he would no longer fee the fine ifland which he has deferibed. “ He might '{Till fee alum, in the form of feathers, and fringed with iilver thread, hang¬ ing from the arches of the caverns ; pieces of pure fulphur filling the cliffs of the rocks ; a variety of mi¬ neral fprings ; hot baths (though thefe are now only a fet of fmall dirty caves) ; the fame lubterraneous fires which in his days warmed the bofom of the earth, and were the caufe of its extraordinary fertility : but inftead of 5000 Greeks, all paying the capitation tax (a), he would now find no more than about 700 (A) Grown up men are the only 5000 who paid the tax, the women, at leaft 23,000 fouls. perfons who pay the capitation tax. Therefore, by adding to the number of boys, and girls, we find that Melds, in the days of foumefort, contained .. Milo. MIL [ii inhabitants on an ifland 18 leagues in clioumferenre. Pie would figh to behold the find! lands lying unculti¬ vated, and the molt fertile valleys converted into mo- raiies ; of the gardens Icarcely a veftige left 5 three- fourths of the town in ruins, and 'the inhabitants daily decreafing. In fbort, during the laft 50 years, Melos has aifumcd a quite different appearance. The plague, which the Turks propagate everywhere, has cut off one part of its inhabitants ; the injudicious admini- ftration of the Porte, and the oppreflive extortions of the captain pacha, have dellroyed the reft. At pre- fent, for want of hands, they cannot cut out a free channel for their waters, which ftagnate in the valleys, corrupt, and infeft the air with their putrid exhala¬ tions. I he fait marftres, of which there are numbers in the ifland, being equally negle&ed, produce the fame effects. Add to thefe inconveniences, thofe ful- phureous exhalations which arife all over the ifland, and by which the inhabitants of Melos are aftli&ed with dangerous fevers during three-fourths of the year. Perhaps they may be obliged to forfake their coun¬ try. Every countenance is yellow, pale, and livid; and none bears any marks of good health. The pru¬ dent traveller wall be careful to fpend but a very fhort time in this unvvholefome country, unlefs he choofes to expofe bimfelf to the danger of catching a fever. To deep over night, or to fpend but one day in the iiland, is often enough to occafion his being attacked with that diftemper. “ Yet (continues our author) a judicious and en¬ lightened government might expel thofe evils which,, ravage Melos. Its frrft care would be to eftabliftr a la¬ zaret, and to prohibit veffels whole crewTs or cargoes are infetfled with the plague from landing. Canals might next be cut, to drain the marfhes, whofe exha¬ lations are fo pernicious. The iftand would then be repeopled. The fulphureous vapours are not the moft noxious. 1 hefe prevailed equally in ancient times, yet the ifland was then very populous. M. Tournefort, ivho travelled through it at a time lefs diftant from the period when it w^as conquered by the Turks, and when they had not yet had time to lay it wafte, rec¬ kons the number of its inhabitants (as we have faid) at about 20,000. The depopulation of Melos is there¬ fore to be afcribed to the defpotifm of the Porte, and is deteftable police.” I he women of Milo, once fo celebrated for their land's Tourkzm'iy, are now fallow, unhealthy, and difguftingly up the ugly ; and render themfelves ftiil more hideous by their drefs, which is a kind of loofe jacket, with a white coat and petticoat, that fcarccly covers two-thirds of their thighs, barely meeting the flocking above the knee. Their hind hair hangs down the back in a number of .plaits ; that on the fore part of the head is combed dovyn each 11 de of the face, and terminated by a fmall itift curl, which' is even with the lower part of the cheek. All the inhabitants are Greeks, for the Turks are not fond ol truding themfelves in the fmall iflands ; but every fummer the captain bafhaw goes round with a fquadron to keep them in fubje6tion, and to collect the revenue. When the Ruffians made themfelves ma¬ ilers of the Archipelago, many of the iflands declared in their favour 5 but being abandoned by the peace, they were fo feverely middled by the grand lignior, that they have profeffed a determination to remain perfeclly ■2 Suthcr- Straits, p. 146. o ] MI L quiet in future. As the Turks, however, do not think them worth a garrifon, and will not truft them with arms and ammunition, all thofe which the Ruffians may choofe to invade will be obliged to fubmit. The two points which form the entrance of the harbour, crof- ling each other, rend'^y it imperceptible until you are clofe to it. Thus, while you are perfeclly fecure within it, you find great difficulty in . getting out, par¬ ticularly in a northerly wind j and as no trade is car¬ ried on except a little in corn and fait, Milo would fcarcely ever be vifited, were it not that, being the firft ifland which one makes in the Archipelago, the pilots have chofen it for their refidence. They live in a little town on the top of a high rock, which, from its fituation and appearance, is called the Cq/t/e.— Partridges ftiil abound in this ifland.; and are fo cheap, that you may buy one for a charge of potvder only. The peafants get them by Handing behind a portable fereen, with a fmall aperture in the centre,- in which they place the muzzle of their piece, and then draw the partridges by a call. When a fuiHcient number are colledled, they fire among them, and generally kill from four to feven at a ftiot ; but even this method of getting them is fo expenfive, from the fcarcity of am¬ munition, that the people can never afford to flioot them, except when there are gentlemen in the iflaPd, from whom they can beg a little powder and ftiot. Milo is 60 miles north of Candia ; and the town is fituated in E. Long. 25. 15. N. Lat. 36. 27. MILSTONE. See Millstone. MILT, in Anatonnj, a popular name for the Spleen. Milftone . I! Miltiades. Milt, or Melt, in Natural Hijlory, the foft roe in fifties ; thus called from its yielding, by expreffion, a whitifli juice refembling milk. See Roe. The milt is properly the feed or fpermatic part of the male fifh. The milt of a carp is reckoned a choice bit. It confifts of two long whitifti irregular bodies, each in¬ cluded in a very thin fine membrane. M. Petit confi- ders them as the tefticles of the fi(h wherein the feed is preferved ; the lower part, next the anus, he fuppofes to be the veficulce feminales. MILTHORP, a port town of Weftmoreland, at the mouth of the Can, five miles from Kendal. It is the only fea port in the county ; and goods are brought hither in fmall vefftls from Grange in Lan- cafbire. Here are two paper mills. It has a market on Friday, and a fair on Old May day ; and there is a good ftone bridge over the river Betha, which runs through the town. MILTIADES, an Athenian captain, fori of Cyp- felus. He obtained a viftory in a chariot race at the Olympic games. He led a colony of Athenians to the Cherfonefus. The caufes of this appointment are ftriking and fingular. The Thracian Dolonci, ha- raffed by a Tong war with the Abfynthians, were di¬ rected by the oracle of Delphi to take for their king the firft man they met in their return home, who in¬ vited them to come under his roof and partake his entertainments. This was Miltiades, whom the ap¬ pearance of the Dolonci, with their ftrange arms and garments, had ftruck. He invited them to his houfe, and was made acquainted with the commands of the oracle. He obeyed ; and when the oracle of Delphi had approved a fecond time the choice of the Do¬ lonci, MIL [i Tvlilthdes. lonci, he departed far the Cherfonefus, and was in "v vefted by the inhabitants with fever: ign power. The firlf meafures he took were to Jfop the further incur- hons of the- Abfynthians, by building a ifrong wall acrofs the iflhmus. When he had eftablilhed hirafelf at home, and fortified his dominions againil foreign invafion, be turned his arms againft Lampfacus. His expedition was unfuccefsful •, he was taken in an am- bufeade, and made prifoner. His friend Croefus king of Lydia was informed of his captivity, and procured his releafe. He lived few years after he had reco¬ vered his liberty. As he had no iflue, he left his kingdom and pofleffions to Stefagoras the fon of Ci- mon, who was his brother by the fame^ mother. The memory of Miltiades was greatly honoured by the Dolonci, and they regularly celebrated feflivals and exhibited fhows in commemoration of a man to whom they owed their greatnefs and prefervation. Miltiades, the fon of Cimon, and brother of Stefagoras mentioned in the preceding article, was fume time after the death of the latter, who died without iifue, fent by the Athenians with one flrip to take poffeffion of the £herfonefus. At his arrival Mil- tiades appeared mournful, as if lamenting the recent death of his brother. The principal inhabitants of the country vifited the new governor to condole with 'him ; but their confidence in his fincerity proved fa¬ tal to them. Miltiades feized their perfons, and made himfelf abfolute in Cherfonefus. To ftrengthen him- felf, he married Hegefipyla, the daughter of Olorus the king of the Thracians. His triumph was fiiort. In the third year of his government, his dominions were threatened by an invafion of the Scythian No- „ mades, w>hom Darius had fome time before irritated by entering their country. He fled before them ; but as their hoftilities were of fnort duration, he was foon reflored to his kingdom. Three years after, he left Cherfonefus •, and fet fail for Athens, where he was received with great applaufe. He was prefent at the celebrated battle of Marathon ; in which all the chief officers ceded their power to him, and left the event of the battle to depend upon his fuperior abilities. He obtained an important victory over the more numerous forces of his adverfaries. Some time after, Miltiades was intrufted with a fleet of 70 fliips, and ordered to punifli thofe iflands which had revolt¬ ed to the Ptrfians. He was fuccefsful at firft, but a fudden report that the Perfian fleet was coming to attack him, changed his operations as he was befieging Paros. He raifed the fiege, and returned to Athens. He was accufed of treafon, and particularly of hold¬ ing correfpondence with the enemy. The falfity of thefe accufations might have appeared, if Miltiades had been able to come into the afiembly. But a wound which he had received before Paros detained him at home ; and his enemies, taking advantage of his abfence, became more eager in their accufations, and louder in their clamours. He was condemned to death ; but the rigour of his fentence was retrac¬ ed on the recolleCion of his great fervices to the A- thenians, and he was put into prifon till he had paid a fine of 50 talents to the ftate. His inability to dif- charge, fo a great a fum detained him in confinement; and his wounds becoming incurable, he died a pri- fbner about 489 years before the Chriftian era. His i ] MI L body was ranfomed by his fon Cimon ; who was obli¬ ged to borrow and pay the 50 talents, to give his father a decent burial.—The accufations againff Miltiades were probably the more readily believed by his coun¬ trymen, when they remembered how he made him¬ felf abfolute in Cherfonefus} and in condemnino- the barbarity of the Athenians towards a general,0 who was the fource of their military profperity, we muft remember the jealoufy which ever reigns among a free and independent people, and how watchful they are in defence of the natural rights which they fee wrefted from others by violence. Cornelius Nepos has written the life of Miltiades the'fon of Cimon; but his hiflory is incongruous and unintelligible, from his confounding the aCions of the fon of Cimou with thofe of the fon of Cypfelus. Greater reliance is to be placed on the narration of Plerodotus, whofe ve¬ racity is confirmed, and who was indifputably better informed and more capable of giving an account of the life and exploits of men who flourilhed in his age, and of which he could fee the living monuments. Herodotus was born about fix years after the famous battle of Marathon : and C. Nepos, as a w-riter of the Auguftan age, flourifhed about 450 years after the age of the father of hiftory. MILTON, John, the moft illuftrious of the Eng- lifli poets, was defeended of a genteel family, featefl at a place of their own name, viz. Mi/ton, in Oxford¬ shire. He was born December 9. 1608, and received his firfl rudiments of education under the care of his parents, aflifted by a private tutor. He afterwards palled fome time at St Paul’s fchool, London ; in which city his father had fettled, being engaged in the bufi- nefs of a ferivener. At the ageof'17, he was fent to Chrift’s college, Cambridge; where he made great progrefs in all parts of academical learning ; but his chief delight was in poetry. In 1628, he proceeded bachelor of arts, having performed his excrcife for it with great applaufe. His father defigned him lor the church ; but the young gentleman’s attachment to the Mules was fd ftrong, that it became impoflible to engage him in any other purfuits. In 1632, he took the de¬ gree of mafter of arts; and. having now fpent as much time in the univerfity as became a perfon who deter¬ mined not to engage in any of the three profeffions, he left the college, greatly regretted by his acquain¬ tance, but highly difpleafed with the ufual method of training up youth there for the ftudy of divinity ; and being much out of humour with the public adminiflra- tion of ecclefiaftical affairs, be grew diflatisfied with the eflablilhed form of church government, and difliked the whole plan of education pradifi-d in the univerfity. His parents who now dwelt at Horton, near Coin- brook, in Buckinghamfhire, received him with una¬ bated affeclion, notwithfianding he had thwarted their - views of providing for him in the church, and they amply indulged him in his love of retirement; wherein he enriched his mind with the choiceft ftores of Gre¬ cian and Roman literature; and his poems of Comur, l'Allegro, UPenferofo, and Lycidas, all wrote at thi’ time, would have been fufficient, had he never produ¬ ced any thing more confiderable, to have tranfmitted his fame to the latefl pofierity. How’ever, he was not fo abforbed in his lludies as not to make frequent ex- curfions to London 3 neither did fo much excellence pals. Mill on, MIL [ H2 ] MIL pafs unnoticed among his neighbours in the country, well, and on the return of the long parliament, Milton Miko® with the moft diftinguiihed of whom he fometimes being ftill continued fccretary, he appeared again in chofe to relax his mind, and improve his acquaintance print ; pleading for a farther reformation of the laws with the world as well as with books.—After five relating to religion ; and, during the anarchy that en- years fpent in this manner, he obtained his father’s fued, he drew up feveral fchemes for re-ellablifhing the- permifiion to travel for farther improvement. At Paris commonwealth, exerting all his faculties to prevent he became acquainted with the celebrated Hugo Gro- the return of Charles II. England’s deftiny, however, tius} and from thence travelling into Italy, he was and Charles’s good fortune, prevailing, our author -everywhere careffcd by perfons of the moft eminent chofe to confult his fafety, and retired to a friend’s quality and learning. houfe in Bartholomew-Clofe. A particular profecu- Upon his return home, he fet up a genteel academy tiori wras intended agaipft him but the juft efteem to in Alderfgate ftreet.—In 1641, he began to draw his which his admirable genius and extraordinary accom- pen in defence of the Prefbyterian party ; and the next pliftiments entitled him, had raifed him fo many friends, year he married the daughter of Richard Potvell, Efq. even among thofe of the oppofite party, that he was in- of Foreft Hill in Oxfordfhire. This lady, however, eluded in the general amnefty. whether from « difference on account of party, her This ilorm being over, he married a third wife, Eli- father being a zealous royalift, or fome other caufe, zabeth, daughter of Mr Minftrall a Chelhire gentleman j Icon thought proper to return to her relations j which fo and not long after he took a houfe in the Artillery incenfed her hulhand, that he refolved never to take Walk, leading to Bunhill Fields. This was his laft ftage: Ter again, and wrote and publifhed feveral trails in here he fat down for a longer continuance than he had defence of the do£frine and difeipline of divorce. He been able to do anywTere ; and though he had loft even made his addreffes to another lady ; but this in- his fortune (for every thing belonging to him went to cident proved the means of a reconciliation with Mrs wreck at the Reftoration), he did net lofe his tafte for Milton. literature, but continued his ftudies with almoft as much In 16.14, he wrote his Tra£t upon Education j ardour as ever'; and applied himfelf particularly to the .and the reftraint on the liberty of the prefs being finiftiing his grand work, the Paradife Lojl ,• one of the .continued by aft of parliament, he wrote boldly and nobleft poems that ever was produced by human genius, nobly again ft that reflraint. In 1645, he publiihed —It was publiftred in 1667, and hh Par adife Regained his juvenile poems; and about two years after, on the came out in 1670.—This latter work fell fliort of the death of his father, he took a fmaller houfe in High excellence of the former produftion ; although, wrere .Holborn, the back of which opened into Lincoln’s- it not for the tranfeendent merit of Paradife Loft, the Inn Fields.—Here he quietly profecuted his ftudies, fecond compcfition would doubtlefs have flood fore¬ till the fatal cataftrophe and death of Charles I.; on moft in the rank of Engliftr epic poems. After this he which occafion he publiftied his Tenure of Kings and pubiiihed many pieces in profe ; for which wre refer our .Magiftrates, in juftification of the faft. He was now readers to the edition of his Hiftorical, Poetical, and taken into the fervice of the commonwealth, and made Mifcellaneous Works, printed by Millar, in 2 vols. Latin femetary to the council of ftate, who refolved 410, in 1753. -neither to write to others abroad, nor to receive any In 1674, this great man paid the laft debt to na- anfwers, except in the Latin tongue, which was com- ture at his houfe in Bunhill Fields, in the 66th year -mon to them all. The famous B«cr here, which was caftellated, and flood below the church j but was burnt down in Edward the Confelfur’s time by Earl Goodwin, &c. Its church Hands near a mile off. On approaching the town up the Thames, by the Eall Swale, it feems hid among the creeks : yet it is a large town ; and has a confiderable market on Sa¬ turdays, and a fair on July 24. The oyllers taken here are the moft famous of any in Kent. This town is governed by a portreeve, chofen yearly on St James’s day, who fupervifes the weights and meafures all over the hundred of Milton. Milton, in Kent, a mile on the eaft fide of Gravef- end, was incorporated with it in the reign of Queen Elizabeth, by the name of the portreeve, jurats, and inhabitants of the towns of Gravefend and Milton, King Henry VIII. raifed a platform or blockhoufe here, for the defence both of this town and Gravef¬ end, and the command of the river. It has a fair January 25 MILViUS, Molvius, or Mulvius, Pons; abridge on the Tiber, built by TEmilius Scaurus the cenfor, in the time of Sylla, at two miles difiance from the city, on the Via Flaminia, and repaired by Augullus. From this bridge the ambaffadors of the Allobroges were brought back to Rome, by Cicero’s management, and made a difcovery of Catiline’s confpiracy (Salluft). Near it Maxentius was defeated by Conflantine (Eu- tropius). Now called Ponte Mol/e. Milvius, a fpecies of Falco. See Falco, Orni¬ thology Index. MIMI, Mimes, in the ancient comedy, were buf¬ foons or mimics, who entertained the people by taking off certain characters, ufing fucb geflures as fuited the perfons or fubjefls they reprefented. There were on the Roman nags female performers of this kind called mini*. The word is derived from / imitate. Some of the mimi a61ed their parts to the found of the tibia ; thefe they called mimauli. Mimi were alfo a kind of farces or ludicrous come¬ dies, generally performed by one perfon. They had no adts, nor any exordium.—The mimi were introduced upon the Roman ffage long after comedy and tragedy had arrived at their full perfection. The adlor wore no mafk, but fmeared his face with foot, was drefled in lambfkin, wore garlands of ivy, and carried a bafket of flowers and herbs, in honour of Bacchus, and di¬ verted the audience with apifh tricks and ridiculous dances. This was the flate of the mimi foon after their firfl; introdudlion j but they underwent many altera¬ tions, which it would take up too much room to relate, and which are not of fufficient importance to juflify a detailed account. See Pantomimes. MIMESIS, in Rhetoric, the imitating the voice and geftures of another perfon. MIMNERMUS, an ancient pogt and mufician, flouriflied about the beginning of the fixth century B.C. He was of Smyrna, and cotemporary with Solon. A- thenaeus gives him the invention of pentameter verfe. His elegies, of which only a few fragments aie pre- ferved, were fo much admired m antiquity, that Ho¬ race preferred them to thofe of Callimachus. He com- pofed a poem of this kind, as we learn from Paufanias, Vol. XIV. Part I. - upon the battle fought between the people of Smyrna, Mimofa and the Lydians under Gyges. He likewife was au- 1111 ,. thor of a poem in elegiac verfe, quoted by Strabo, 1 which he entitled Nanno, and in which we may fuppofe y—»J he chiefly celebrated a young and beautiful girl of that name, who, according to Athenaeus, was a player on the flute, with whom he was enamoured in his old age. With refpeft to love matters, according to Propertius, his verfes were more valuable than all the writings of Flomer. Plus in amore valet Mimnermi v erf us Homero. Lib. I. Eleg. ix. v. 11. Aqd Horace bears teftimony to his abilities in de- fcribing that feducing paflion : Si Mimnernus uti cenfet, fine amore jocifque Nil efi jucundum, vivas in amore jocifrjue. Lib. 1. Epift. vi. v. 65. If, as wife Mimnermus faid,. Life unbleft with love and joy Ranks us with the fenielefs dead, Let thefe gifts each hour employ. Alluding to fome much admired lines of the Greek poet, which have been preferved by Stobaeus. /3ok Avening 5 and has 12 hamlets belonging to it, with a common called Amberley. Here is a good large redfory church, built in form of a crols, and worth 200I. a-year. Near it are very large camps, with deep trenches j and near Dunkirk in this parifli are fulling mills. MINCIUS, a river of the Tranfpadana in Italy •, running from, or rather tranfmitted through, the i^acus Benacus, from north to fouth, into the Padus 5 but ori¬ ginally rifing in the Rhetian Alps. Now Mincio or Menzo, running through the duchy of Mantua into the Po. MIND, a thinking intelligent being, otherwufe call¬ ed fpirit, in oppofition to matter or body. See Me¬ taphysics, Part III. MINDANAO, or Magindanao, a large ifland of Afia in the Eaft Indies, and one of the Philippmes •, 160 miles in length, and 1 20 in breadth. The inte¬ rior parts contain feveral chains of lofty mountains, between which are extenfive plains, where vaft herds of cattle roam at large in the moft delicious pallures. Several deep valleys alfo interfedf, as it were, certain parts of the country, through which, during the rainy feafons, vaft torrents pour from the mountains, and force their impetuous way to the fea. The rains and vapours which lodge in the plains diffufe themfelves into meandering rivulets, and, colledling a variety of fmall ftreams in their courfe, approach the fea in the form of eonfiderable rivers.—The fovereign of Magindanao is a powerful prince, and has feveral inferior chiefs, who acknowledge him as tneir head. Neverthelcis, there are others of them who refufe fubmifliori to him, and are confequently in a continual ftate of wTar j fo that peace, at leaft, does not appear to be one of the blef- fings of this ifland. The Spaniards, indeed, affert their right to the entire dominion of Magindanao 5 but it is mere affertion } for though they have forts, &c. on the illand, it is by no means in a ftate of fub- jeffion to their nation. The air is efteemed falubrious, particularly in the vicinity of the fea. The heat there is not, in any de¬ gree, fo intenfe as might be expected in a country •which is fituated on the very verge of the torrid zone. The prevalence of the eafterly winds, in that part of the coafis which is walhed by the Pacific ocean, ren¬ ders the. air cool and pleafant, the trade wind.blowing M T N inceffantly on its (bores. It a£!s, indeed, with fo Mindel- much power as to fweep the whole breadth of the h<''m ifland j and though in its paflage it lofes much of its (Length, it retains a fufficient degree of force to af- _ ford refreshing breezes to the inhabitants of the weftern Shore. The interior parts are much colder, from a very cloudy atmofphere, which frequently hangs over the fummits of the mountains in thick and humid va¬ pours. The foil, which is very exuberant, is fuited to the cultivation of the whole vegetable tribes. Rice is produced in the greateft abundance ; a pecul, or 133 pounds, may be purchafed for a Spanifh dollar. Eve¬ ry part of the ifland abounds with buffaloes, cows, hogs, goats, &.c. It affords alfo great variety of fowls, and a fpecies of duck, whofe head is of a fine fcarlet colour. Here is al(b a fmall breed of horfes, remarkable for their fpirit. The natives, however, principally employ buffaloes- in the various branches of husbandry and agriculture. The city of Magindanao is Situated on the fouth- eafi fide of the ifland, has a river capable of admitting fmall veffels, and carries on a considerable trade with Manilla, Sooloo, Borneo and the Moluccas. Their exports are rice, tobacco, bees wax, and fpices; ii> return for which they receive coaife cloths of Coro¬ mandel, China ware, and opium. The village or town of Samboingan is fituated on the banks of a fmall rivulet, which empties itfelf immediately into the fea, and is agreeably Shaded by groves of cocoa trees. The number of its inhabitants is about 1000, among which are included the officers, foldiers, and their re- Spe&ive families. In its environs there are feveral fmall look-out houfes, ereffed on pofts of twelve feet high, in all of which a conftant guard is kept; fo that it appears as if the Spaniards were in a continual ftate of enmity with the natives. The houfes are built of thofe Simple materials which are of very general ufe in the eaftern feas. They are erefted on pofts, and built of bamboo, covered with mats j the lower apart¬ ments ferve for their hogs, cattle, and poultry, and the upper ones are occupied by the family.” MINDELHEIM, a town of Germany, in the circle of Suabia, and in Algow, with a caftle. It is capital of a fmall territory between the rivers Iller and Lech, fubjedl to the houfe of Bavaria. It was taken by the Imperialifts after the battle of Hoch- ftet, who erefted it into a principality in favour of the duke of Marlborough ; but it returned back to the houfe of Bavaria by the treaty of Raftadt. It is 33 miles fouth-eaft of Ulm. E. Long. 10. 40. N. Lat. 48. 5. MindELHF.im, a diftrift of Germany, in Suabia, ly¬ ing between the biShoprick of AugSburg and the ab¬ bacy of Kempten, which is 20 miles in length and 16 in breadth. MINDEN, a considerable town of Germany, in the circle of Weftphalia ; and capital of a territory of the fame name j feated on the river Wefer, which renders it a trading place. It formerly belonged to the king of Pruflia, who fecularized the bishopric. It is 27 miles eaft by fouth of Ofnaburg, and 37 weft of Hanover. E. Long. 9. 5. N. Lat. 52 22. MlNDEN (the principality of), in Germany, lies in the circle of WeStphalia, to the north of the county of Ravenfburg, and along each fide of the river Wefer,. Ik t 1*4-1 MIN Mimlora, It is about 22 miles fquare, and Minden and Peter- M;ne- fliagen are the principal places. It was formerly a * bilhopric, but is now fecularized : and was ceded to the ele&or of Brandenburg by the treaty of Weft- phalia. MINDORA, an ilknd of Alia, in the Eaft Indies, and one of the Philippines, jo miles in circumference, and feparated from Luconia by a narrow channel. It is full of mountains, which abound in palm trees and all forts of fruits. The inhabitants are idolaters, and pay tribute to the Spaniards, to whom this ifland belongs. MINE, in NaturalHi/lory, a deep pit under ground, from whence various kinds of minerals are dug out j but the term is more particularly applied to thofe which yield metals. Where ftones only ace procured, the appellation of quarries is univerfally bellowed upon the places from which they are dug out, however deep they may be. The internal parts of the earth, as far as they have been yet inveftigated, do not conlilf of one uniform fubllance, but of various Jlrata or beds of fubftances, extremely different in their appearances, fpecific gra¬ vities, and chemical qualities, from one another. Nei¬ ther are thefe llrata fimilar to one another either in their nature or appearance in different countries ; fo that even in the ftiort extent of half a mile, the llrata will be found quite different from what they are in another place. As little are they the fame either in depth or folidity. Innumerable cracks and filfures, by the miners called lodes, are found in every one of them ; but thefe are fo entirely different in fize and lhape, that it is impollible to form any inference from their fize in one place to that in another. In thefe lodes or fiffures the metallic ore is met with ; and, confidering the great uncertainty of the dimenfions of the lodes, it is evident that the bufinefs of mining, which depends on that fize, mull in like manner be quite uncertain and precarious. Mr Price, in his treatife on the Cornilh mines, obferves, that “ the comparative fmallnefs of the large!! filfures to the bulk of the whole earth is really wonderful. In the fineft pottery we can make, by a microfcopic view, We may difcover numerous cracks and filfures, fo fmall as to be impenetrable by any fluid, and impervious to the naked eye j as, by the laws of nature originally im- pofed by. the Creator, it happens that matter cannot contradl itlelf into folid large mafl'es, without leaving fiffures between them, and yet the very filfures are as necelfary and ufeful as the llrata through wThich they •pafs. They are the drains that carry off the redun¬ dant moilture from the earth 5 which, but for them, would be too full of fens and bogs for animals to live or . plants to thrive on. In thefe filfures, the feveral ingredients wbich form lodes, by the conti¬ nual palfing of waters, and the menllrua of metals, are brought out of the adjacent llrata, colkaed and con¬ veniently lodged in a narrow channel, much to the .advantage of thole who fearch for and purfue them ^ loi if metals and minerals were more difperfed, and Scattered thinly in the body of the llrata, the trouble of finding and getting at them would be endlefs; and the expence of procuring them exceed the value of the acquifition. I he infides of the filTures are commonly coated M I N over with a hard, cryllalline, earthy fubllance or rind, which very often, in the breaking of hard ore, comes off along with it, and is commonly called the cafyels or walls of the lode : but Mr Price is of opi¬ nion, that the proper walls of the lode are the fides of the .filfure itfelf, and not the coat julf mentioned, which is the natural plaller upon thole walls, furnilhed perhaps by the contents of the filfures, or from oozings of the furrounding llrata. The breadth of a lode is eafily known by the di- llance betwixt the two incrulted fides of the Hones of ore 5 and if a lode yields any kind of ore, it is a bet¬ ter fign that the walls be regular and fmooth, or at leall that one of them be fo, than otherwife y but there are not many of thefe fiffures which have regu¬ lar walls until they have been funk down fome fa¬ thoms. Thus the inner part of the fiffure in which the ore lies., is all the way bounded by twm w^alls of Hone, which are generally parallel to one another, and in¬ clude the breadth of the vein or lode. Whatever angle ot inclination fome fiffures make in the folid ftrata at their beginning, they generally continue to do the fame all along. Some are very uncertain in their breadth, as they may be fmall at their upper part and wdde underneath, and vice verfa. Their re¬ gular breadth, as well as their depth, is fubjeft ta great variation ; for though a fiffure may be many fathoms wide in one particular place, yet a little fur¬ ther call or w’ell it may not perhaps be one inch wide. This exceflive variation happens generally in very compadl llrata, when the vein or fiffure is fqueez- ed, as it were, through hard rocks which feem to comprefs and llraiten it. A true vein or fiffure, how¬ ever, is never entirely obliterated, but always Ihows a firing of metallic ore or of a veiny fubllance ; which often ferves as a leader for the miners to follow until it fometimes leads them to a large and richly im¬ pregnated part. Their length is in a great meafure unlimited, though not the fpace bell fitted for yield- ing meial. The richell Hate for copper, according to Mr Price, is from 40 to 80 fathoms deep ; for tin, from 20 to 60 : and though a great quantity of ei¬ ther may be raifed at 80 or 100 fathoms, yet, “ the quality (fays our author) is often too much decaved and dry for metal.” Mr Price informs us, that the fiffures or veins of the Cornilh mines extend from call to well; or, more properly, one end of the fiffure points well and by fouth, 01 well and by north ^ while the other tends call and by fouth, or call and by north. Thus they frequently pafs through a confiderable tra& of coun¬ try with very few variations in their dire&ions, un- lefs they be interrupted by fome intervening caufe. But, befides this call and well direflion, w*e are to confider what the miners call the underlying or hade of the vein or lode j viz. the deflexion or deviation of the fiffure from its perpendicular line, as it is follow¬ ed in depth like the Hope of the roof of a houfe, or the defcent of the lleep fide of a hill. This Hope is geneially to the north or fouth 5 but varies much la different veins, or fometimes even in the fame vein ^ for it will frequently dope or underlie a fmall fpace in different w?ays, as it may appear to be forced by hard ilrata on either fide.—Some of the fiiliires da B 3 Otft [ ir5 ] Mine. MIN [ii Mire, not vary much from a perpendicular, while feme devi- *"~v"—' ate more than a fafhom j that is, for every fathom they defeend in perpendicdlar height, they deviate likewife as much to the fouth or north. Others differ fo much from the perpendicular, that they affume a pofition almod horizontal *, whence they are alfo called hon- ■%ontal or fiat lodes, and fometimes lode plots. Ano¬ ther kind of thefe has*an irregular pofition with re¬ gard to the reft ; widening horizontally for a little way, and then defeending perpendicularly almoft like itairs, with only a fmall firing or leader to follow af¬ ter j and thus they alternately vary and yield ore in feveral flat or horizontal fiffures. This, by the Cor- liifh tinners, is called (but in Mr Price’s opinion erro- neoully) a floor or fquat ; which, properly fpeaking, is a hole or chafm impregnated with metal, making no continued line of direction or regular walls. Nei¬ ther does a floor of ore defeend to any confiderable depth ; for underneath it there appears no lign of a vein or fiffure, either leading diredlly down or any other way. This kind of vein is very rare in Britain. The fiffures moft common in Britain are the perpendicu¬ lar and inclined, whether their direftion be north or' fouth, eaft or weft. The perpendicular and horizontal fiffures (accord¬ ing to our author) probably remain little altered from their firft pofition, when they were formed at the in¬ duration of the ft rata immediately after the waters left the land. The perpendicular fiffures are found more commonly fituated in level ground, at a diftance from hills, and from the fea ftiore; but with regard to the latter, we find that the uppec and under maffes of ftrata differ in their folidity and other properties. Hence, (fays our author) it is very plain, that- in¬ clined fiffures owe their defledlion or underlie to fome fecondary caufe, violence, or fubfidence, of the earth : for though perpendicular fiffures are feldom to be feen, vet fuch as are inclined at very confiderable depths, be¬ come more and mere perpendicular, as the more central ftrata, by reafon of the vaft fuperincumbent weight, do not feem fo likely to be driven out of their pefition as thofe which lie nearer the furface.” The fiflures are often met with fraffured as well as inclined ; the reafon of which, in Mr Price’s opi¬ nion, has been a fubfidence of the earth from fome extraordinary caufe. “ The original pofiticn (fays he) muft have been horizontal, or parallel to the fur- face of the earth : but we often find thefe flrata very fenfibly declined from that firft pofition 5 nay, fome¬ times quite reverfed, and changed into perpendicular. When we fee a wall lean, we immediately conclude that the foundation has given w’ay, according to the angles which the walls make with the horizon ; and when we find the like declination in ftrata, we may conclude, by parity of reafon, that there has been a like failure of what fupported them, in proportion to A that declination ; or that ivhatever made the ftrata to fall fo much awry, muft alfo caufe every thing includ¬ ed in thofe ftrata to fall proportionally. Wherever the greateft fubfidence is to the north, the top of the lode or fiffure will point to the north, and of confe- quence underlie to the fouth, and vice verfla : the ijide or heave of the lode manifefts the greater fubfi- dence of the ftrata ; but the fame lode is frequently fira&ured and heaved in feveral places, all of which, 6 ] MIN by due obfervation, will ftrow us they were occafion- Mine, ed by fo many feveral ftiocks or fub£dencies, and that v—" the ftrata were net unfooted, lhaken, or. brought to fall only once or twice, but feveral times.” Mr Price in the ccurfe of his work, pbferves, that though the metallic veins generally run from eaft to weft, they are frequently interfered by veins or lodes, as he calls them, of other matters, which run from north to fouth. Some of thefe crofs veins contain lead or antimony, but never tin or copper. Sometimes one of thefe unmetallic veins interfedls the true one at right angles, fometimes obliquely •, and fometimes the mixture of both is fo intimate, that the moft ex¬ pert miners are at a lofs to difeever the feparated part of the true vein. When this laft is intercepted at right angles, it is moved either north or fouth, a very little way, perhaps not more than one fathom ; in which cafe, the miners having worked to a fmall diftance in one of thefe direftions, if they find them- felves difappointed, turn to the other hand, and feldom fail of meeting with what they expefted. Sometimes they are directed in their fearch by the pointing of a rib or firing of the true vein-, but when the interruption happens in an oblique dire£Hon, the difficulty of finding the vein again is much greater. When two metallic veins in the neighbourhood of each other run in an oblique diredhon, and cf confe- quence meet together, they commonly produce a body of ore at the place where they interfedl ; and if both are rich, the quantity will be confiderable ; but if one be poor and the other rich, then both are either en¬ riched or impoverithed by the meeting. After fome time they feparate again, and each will continue its for¬ mer direclion near to the other ; but fometimes, though rarely, they continue united. It is a fign cf a poor vein when it feparates or diver¬ ges into firings ; but on the contrary, when feveral of them are found running into one, it is accounted a pro- mifing fign. Sometimes there are branches without the walls of the vein in the adjacent ftrata, which often come either obliquely or tranfverfely into it. If thefe branches are impregnated with ore, or if they underlie fafter than the true vein, that is, if they dip deeper into the ground, then they are faid to overtake or come into the lode, and to enrich it ; or if they do not, then they are faid to go off from it, and to impoverifh it. But neither thefe nor any other marks either of the richnefs or poverty of a mine are to be entirely depended upon \ for many mines, which have a very bad appearance at firft, do neverthelefs turn out extremely well after¬ wards 5 while others, which in the beginning feemed very rich, turn gradually worfe and worfe : but iri. ge¬ neral, where a vein has a bad appearance at firft, it will be imprudent to be at much expence with it. Veins of metal, as has been already obferved, are fre¬ quently, as it were, fo compreffed betwixt hard ftrata, that they are not an inch wide ; neverthelefs, if they have a firing of good ore, it will generally be worth while to purfue them : and they frequently turn out well at laft, after they have come into lofter ground. In like manner, it is an encouragement to go on if the branches or leaders of ore enlarge either in width or depth as they are worked ; but it is a bad fign if they continue horizontal w ithout inclining downwards*, though it is not proper always to difeontinue the work- / M IN [i ing of a vein which has an unfavourable afpe£l at firft. Veins of tin are worth working when only three inches wide, provided the ore be good } and copper ores when fix inches wdde will pay very well for the working. Some of the great mines, however, have very large veins, with a number of other fmall ones very near each ether. There are alfo veins, croffing one another fome- times met with, which are called contras, vulgarly counters. Ssmetimes tw'o veins run down into the ground in fuch a manner that they meet in the direc¬ tion of their depth ; in which cafe, the fame obferva- tions apply to them which are applicable to thofe that meet in a horizontal direction. Sometimes a vein will fuddenly dilappear without giving any warning, by be¬ coming narrower, or of worfe quality ; which by the miners is called'a Jlart or leaf), and is very common in the mines or Cornwall. In one day’s time they may thus be difappointed in the working of a rich vein of tin, and have no further lign of any thing to wmrk upon. ,At the fractured extremity of their vein they perceive a body of clay or other matter \ and the me¬ thod of recovering their vein is to drive on the work in the diredlion of the former part, fo that their new wmrk {hail make the fame angle with the clay that the other part of the vein does. Sometimes they fink a (haft down from the furface *, but it is generally a matter of difficulty to recover a vein when thus loft. The method of difeovering mines is a matter of fo much difficulty, that it feems furpriling how thofe who were totally unacquainted with the nature of metals firft came to think of digging them out of the earth. According to Lucretius, the difeevery was made by the conflagration of certain woods, which melted the veins of metal in the earth beneath them ; but this feems ra¬ ther to be improbable. Ariftotle, however, is of the fame opinion with Lucretius, and tells us, that fome (hepherds of Spain having fet fire to the w'oods, the earth w7as thus heated to fuch a degree that the ffilver near the furface of it melted and flowed into a mafs j and that in a fhort time the metallic mafs was difeover- ed by the rending of the earth in the time of an earth¬ quake : and the fame ftory is told by Strabo, who af- cribes the difeovery of the mines of Andalufia 'to this accident. Cadmus is Laid by fome to have been the firft who difeovered gold : wffiile others aferibe this to Thoas the Thracian, to Mercury the ion of Jupiter, or to Pifus king of Italy 5 who having left his owm coun¬ try, went into Egypt, wffiere he was elecled king after the death of Mizraim the fon of Ham ; and, on ac¬ count of his difeovery, wTas called the Golden God. Others fay, that Eac/is or Cneacus the fon of Jupiter, or Sol the fon of. Oceanus, was the firft. difeoverer ; but LEfcbylus attributes the difeovery not only of gold, but of all other metals, to Prometheus. The brafs and copper mines in Cyprus were firft difeovered by Cinyra the fon of Agryopa ; and Hefiod aferibes the difeovery of the iron mines of Crete to the Cretan Dadftyli Idiei. The extraftion of lead or tin from its ore in the ifland of Cafliteris, according to feveral ancient authors, w’as difeovered by Pvlidacritus.—The Scripture, however, aferibes the invention of brafs and iron, or at leaft of the methods of working them, to Tubal Cain before the flood. In more modern times, we knew that miries have been frequently difeovered by accident 5 as in fez cliffis, 17] MIN among broken craggy rocks, by the w'afhing of the Mine, tide or floods, alfo by irruptions and torrents of wa- '“““■V"*' ter iffuing out of hills and mountains, and fometimes by the wearing of high roads. Mr Price mentions another way by wffiich mines have been difeovered, viz. by fiery corufcations j which, be fays, he has heard from perfons whofe veracity he is unwilling to que- ikbn. “ The tinners (fays he) generally compare thefe effluvia to blazing ftars or other whim ical like- neffes, as their fears or hopes fuggeft 5 and fearch with uncommon eagernefs the ground over which thefe jack-a-lanterns have appeared and pointed out. We have heard but little of thefe phenomena for many years; whether it be, that the pretent age is lefs cre¬ dulous than the foregoing, or that the ground, being more perforated by innumerable new pits funk, every year, fome of which, by the ftannary laws, are prevent¬ ed from being filled up, has given thefe vapours a more gradual vent, it is not neceffary to inquire, as the fait itfelf is not generally believed.” Mines, however, are now7 moft commonly difeovered by inveftigating the nature of fuch veins, ores, and ftones as may feem moft likely to turn to account i but there is a particular fagacity, or habit of judging from particular figns, which can be acquired only by long praftice. Mines, efpecially thofe of copper, may alfo be difeovered by the harfh and dxfagreeable tafte of the waters which iffue from them ; though it is pro¬ bable that this only happens when the ore lies above the level of the water which breaks out; for it does not feem lively that the tafte of the ore could afeend, unlefs we were to fuppofe a pond or lake of water (landing above it. The prefence of copper in any wa¬ ter is eaiily difeovered by immerging in it a bit of po- lifhed iron, which will thus inftantly be turned of a copper colour, by reafon of the precipitation of the metal upon it. A candle, or piece of tallow put into water of this kind, will in a (hort time be tinged of a green colour. Another and dill more remarkable method of dif¬ eovering mines is faid to be by the virgula divinatoria, or “ divining rod j” which, however incredible the (lo¬ ries related concerning it may be, is Hill relied on by fome, and among others by Mr Price. It is not knoxvn who was the inventor of this method ; but A- gricola fuppofes that it took its rife from the magi¬ cians, who pretended to difeover mines by enchantment. No mention is made of it, however, before the nth century, fince which time it has been in frequent ufe j and the Corpufcular Philofophy has even been called in to account for it. But before vve pretend to account for phenomena fo very extraordinary as thofe reported of the virgula divinatoria, it is neceffary, in the firft place, to determine whether or not they exiit. Mr Price, as has been already hinted, believes in it, though he owns that by reafon of his conftitution of mind 7 and body, he is almoft incapable of co-operating with its influence. 'The following account, however, he gives from Mr William Cookworthy of Plymouth, a gentleman of known veracity and great chemical a- bilities. Pie had the firft information concerning this rod from one Captain Ribeira, who deferted from the Spanifli fervice in (Pueen Anne’s reign, and became captain-commandant in the garrifon of Plymouth 5 in. whid\; Mine. M I N which town he fatisfied feveral Intelligent perfons of the virtues of the rod, by many experiments on pieces of metal hid in the earth, and by an a6tual difcovery of a copper mine near Oakhampton, which was wrought for fome years. This captain very readily (bowed the method of ufing the rod in general, but would not by any means difcover the fecret of diftinguiftiing the dif¬ ferent metals by it: though, by a conftant attention to his praflice, Mr Cookworthy difcovered it. Cap¬ tain Ribeira was of opinion, that the only proper rods for this purpofe were thofe cut from the nut or fruit trees j and that the virtue was confined to certain per¬ fons, and thofe, comparatively fpeaking, but few: but Mr Price fays, that the virtue refides in all per¬ fons and in all rods under certain circumftances. The rod (Tays he) is attracted by all the metals, by coals, limeftone, and fprings of water, in the follow¬ ing order : I. Gold ; 2. Copper ; 3. Iron $ 4. Silver ; 5. Tin 5 6. Lead; 7. Coals j 8. Limeftone and fprings of water. One method of determining the different attraftions of the rod is this: Stand, holding the rod with one foot advanced j put a guinea under that foot, and an halfpenny under the other, and the rod will be drawn down $ (hift the pieces of money, and the rod will be drawn towards the face, or backwards to the gold, which proves the gold to have the ftronger at- traftion. “ The rods formerly ufed were (hoots of one year’s growth that grew forked $ but it is found, that two i'eparate (hoots tied together with packthread or other vegetable fubftance anfwer rather better than fuch as are naturally forked, as the (hoots of the latter are feldom of an equal fize. They are to be tied together by the greater ends, the fmall ones being held in the hands. Hazle rods cut in the winter, fuch as are ufed for fiftiing rods, and kept till they are dry, do beft j though, where thefe are not at hand, apple-tree fuck¬ ers, rods from peach trees, currants, or the oak, though green, will anfwer tolerably well.” Our author next proceeds to defcribe the manner of holding the rod 5 of which he gives a figure, as he fays it is difficult to be defcribed. The fmall ends being crooked, are to be held in the hands in a pofition flat or parallel to the horizon, and the upper part in an elevation not perpendicular to it, but at an angle of about 70 degrees. “ The rod (fays he) being pro¬ perly held by thofe with whom it will anfwer, when the toe of the right foot is within the femidiameter of the piece of metal or other fubjeiff of the rod, it will be repelled towards the face, and continue to be fo while the foot is kept from touching or being direftly over the fubjeft ; in which cafe it will be fenfibly and tlrongly attra&ed, and be drawn quite down. The rod (hould be firmly and fteadily grafped; for if, when it has begun to be attrafted, there be the lead ima¬ ginable jerk or oppofition to its attraftion, it will not move any more till the hands are opened, and a frefh grafp taken. The ftronger the grafp the livelier the rod moves, provided the grafp be fteady and of an equal (Length. This obfervation is very neceflary •, as the operation of the rod in many hands is defeated purely by a jerk or countera&ion : and it is from thence concluded, that there is no real efficacy in the rod, or that the perfon who holds it wants the virtue j M I N whereas, by a proper attention to this circumftance in Mme. ufing it, five perfons in fix have the virtue, as it is v~“ called ; that is, the nut or fruit-bearing rod will an¬ fwer in their hands. If a rod, or the lead piece of one of the nut-bearing or fruit kind, be put under the arm, it will totally deftroy the operation of the virgula divinatoria, in regard to all the fubje&s of it, except water, in thofe hands in which the rod naturally ope¬ rates. If the lead animal thread, as filk, or worded, or hair, be tied round or fixed on the top of the rod, it will in like manner hinder its operation j but the fame rod placed under the arm, or the (ame animal fub- ftances tied round or fixed on the top of the rod, will make it work in thofe hands, in which without thefe ad¬ ditions it is not attraffed.” Such are the accounts of this extraordinary rod, to which it is probable that few will affent; and we believe the inftances of mines having been difcovered by it are but very rare. Another and very ancient mode of dif- covering mines, lefs uncertain than the divii^ng rod, but extremely difficult and precarious, is that called Jhoding; that is, tracing them by loofe ftones, frag¬ ments, or Jhodes, which may have been feparated or carried off to a confiderable diftance from the vein, and are found by chance in running waters, on the fuperficies of the ground, or a little under.—“ When the tinners (fays Mr Price) meet with a loofe fingle done of tin ore, either in a valley or in ploughing or hedging, though at 100 fathoms diftance from the vein it came from, thofe who are accuftomed to this work will not fail to find it out. They confider, that a metallic (lone muft originally have appertained to fome vein, from which it was fevered and caft at a diftance by fome vio¬ lent means. The deluge, they fuppofe, moved moft of the loofe earthy coat of the globe, and in many places wafhed it off from the upper towards the lower grounds, with fuch a force, that moft of the backs or lodes of veins which protruded themfelves above the faft ■were hurried downwards with the common mafs : whence the (kill in this part of their bufinefs lies much in direc¬ ting their meafures according to the fituation of the fur- face.” Afterwards, however, our author complains that this art of Jhodingy as he calls it, is in a great meafure loft. • The following account of a method of finding filver mines by Alonzo Barba feems to be fimilar to that of (boding juft now mentioned. “ The veins of metal (fays he) are fometimes found by great ftones above ground ; and if the veins be covered, they hunt them cut after this manner j viz. taking in their hands a fort of mattock, which has a fteel point at one end to dig with, and a blunt head at the other wherewith to break ftones, they go to the hollows of the mountains, where the current of rain water defcends, or to fome other part of the (kirts of the mountains, and there obferve what ftones they meet wdth, breaking in pieces thofe that feem to have any metal in them 5 whereof they find many times both middling fort of ftones and fmall ones alfo of metal. Then they confider the fitua¬ tion of that place, and wfience thefe ftones can tumble, which of neceflity muft be from higher ground, and follow the track of them up the hill as long as they can find any of them,” &c. “ Another way (fays Mr Price) of difcovering lodes is t ns 1 4 MIN [ i Mine. Is by working drifts acrofs the country, as we call it, that is, from north to fouth, and vice verfa. I tried the experiment in an adventure under my management, where I drove all open at grafs about two feet in the fhelf, very much like a level to convey water upon a mill wheel j by fo doing I was fure of cutting all lodes in my way : and I did accordingly difcover five courfes, one of which has produced above 180 tons of copper ore, but the others were never wrought upon. This method of difcovering lodes is equally cheap and cer¬ tain •, for i oo fathoms in {hallow ground may be driven at 50s. expence.” In that kind of ground called by our author fea- fible> and which he explains by the phrafe tender- Jianditig, he tells us, that “ a very effeflual, proving, and confequential way is, by driving an adit from the loweft ground, either north or fouth $ whereby there is a certainty to cut all lodes at 20, 30, or 40 fathoms deep, if the level admits of it. In driving adits or levels acrofs, north or fouth, to unwater mines already found, there are many frefh veins difcovered, which frequently prove better than thofe they rvere driving to.” After the mine is found, the next thing to be confi- dered is, whether it may be dug to advantage. In or¬ der to determine this, we are duly to weigh the nature of the place, and its fituation, as to wood, water, car¬ riage, healthinefs, and the like j and compare the re- fult with the richnefs of the ore, the charge of digging, damping, walhing, and fmelting. Particularly the form and fituation of the fpot Ihould be well confidered. A mine mud either hap¬ pen, i. In a mountain $ 2. In a hill; 3. In a valley j or, 4. In a flat. But mountains and hills are dug with much greater eafe and convenience, chiefly becaufe the drains and burrows, that is, the adits or avenues, may be here readily cut, both to drain the water and to form gangways for bringing out the lead, &c. In all the four cafes, we are to look out for the veins which the rains or other accidental thing may have laid bare j and if fuch a vein be found, it may often be proper to open the mine at that place, efpecially if the vein prove tolerably large and rich : otherwife the mod commodious place for filuation is to be chofen for the purpofe, viz. neither on a flat, nor on the tops of mountains, but on the fides. The bed fituation for a ipine, is a mountainous, woody, wholefome fpot j of a fafe eafy afcent, and bordering on a navigable river. The places abounding with mines are generally healthy j as danding high, and everywhere expofed to the air •, yet fome places where mines are found prove poifon- ous, and can upon no account be dug, though ever fo rich j the way of examining a fufpefted place of this kind, is to make experiments upon brutes, by expof- ing them to the effluvia or exhalations, to find the ef- fefts. Devonfhire and Cornwall, where there are a great many mines of copper and tin, is a very mountainous country, which gives an opportunity in many places to make adits or fubterraneous drains to fome valley at a didance, by which to carry off the water from the mine, which otherwife would drown them out from getting the ore. Thefe adits are fometimes car¬ ried a mile or two, and dug at a vafl expence, as from 2.ooq1. to 4p.ool. efpecially where the ground is rocky $ 9 ] MIN and yet they find this cheaper than to draw up the Mine. water out of the mine quite to the top, when the water runs in plenty, and the mine is deep. Some¬ times, indeed, they cannot find a level near enough to which an adit may be carried from the very bottom of the mine; yet they find it worth while to make an adit at half the height to which the water is to be raifed, thereby faving half the expence. Mr Codar, confidering that fometimes from fmall dreams, and fometimes from little fprings or colledlions of rain water, one might have a good deal of water above ground, though not a fuflicient quantity to turn an overfhot wheel, thought that if a fuffleient fall might be had, this colledlion of water might- be made ufeful in railing the water in a mine to the adit, where it may be carried off. But now the mod general method of draining mines is by the fleam engine. See SrEAM-Engine. Mine, in the military art, denotes a fubterraneous canal or paflage, dug under the wall or rampart of a fortification, intended ta be blowm up by gun¬ powder. The alley or paffage of a mine is commonly about four feet fquare y at the end of this is the chamber of the mine, which is a cavity of about five feet in width and in length, and about fix feet in height; and here the gunpowder is flowed. The fauciffe of the mine is the train, for which there is always a little aperture left. Two ounces of powder have been found,, by experi¬ ment, capable of raifing two cubic feet of earth 5 con- fequently 200 ounces, that is, 12 pounds 8'ounces, will raife 200 cubic feet, which is only 16 feet Ihort of a cubic toife, becaufe 200 ounces, joined together, have proportionably a great force than two ounces, as being an united force. All the turnings a miner ufes to carry on his mines, and through which he condu&s the fauciffe, fliould be well filled with earth and dung j and the mafonry in proportion to the earth to be blown up, as 3 to 2. The entrance of the chamber of the mine ought to be firmly fhut with thick planks, in the form of a St An¬ drew’s crofs, fo that the enclofure be fecure, and the void fpaces {hut up with dung, or tempered earth. If a gallery be made below or on the fide of the chamber, it mud abfolutely be filled up with the flronged ma¬ fonry, half as long again as the height of the earth j. for this gallery will not only burfl, but likewife ob- flrutt the effeft of the mine. The powder fliould al¬ ways be kept in facks, which are opened when the mine is charged, and fome of the powder flrewed about: the greater the quantity of earth to be raifed is, the greater is the effedt of the mine, fuppofing it to have the due proportion of powder. Powder has the fame effedl upon mafonry as upon earth, that is,- it will proportionably raife either with the fame velo¬ city. The branches which are carried into the folidity of walls do not exceed three feet in depth, and two feet fix inches in width nearly : this fort of mine is mod ex¬ cellent to blow up the ffrongeff walls. The weight of a cubic foot of powder fliould be- 8olb.; 1 foot 1 inch cube will weigh loolb. and 1 foot 2 inches and 44 15plb. j and 200lb. of powder will bee MIN [ 120 ] MIN be i foot 5 Inches cube; however there is a diverfity In this, according to the quantity of faltpetre in the gunpowder. If, when the mines are made, water be found at the bottom of the chamber, planks are laid there, on which the powder is placed either in facks or barrels of loolb. each. The fauciffe muft have a clear paffage to the powder, and be laid in an auget or wooden trough, through all the branches. When the powder is placed in the chamber, the planks are laid to cover it, and others again acrofs thefe ; then one is placed over the top of the chamber, which is fhaped for that purpofe; between that and thofe which cover the powder, props are placed, which fiiore it up j fome inclining towards the outfide j others to the infide of the wall j all the void fpaces* being filled with earth, dung, brick, and rough Hones. Afterwards planks are placed at the entrance of the chamber, with one acrofs the top, whereon they buttrefs three ftrong props, whofe other ends are likewife propped againft another plank fituated on the fide of the earth in the branch j which props being well fixed between the planks with wedges, the branch fliould then be filled up to its entrance, with the forementioned materials. The fauciffes which pafs through the fide branches muft be exadily the fame length with that in the mid¬ dle, to which they join : the part which reaches beyond the entrance of the mine is that which conveys the fire to the other three ; the fauciffes being of equal length, •will fpring together. From a great number of experiments, it appears l. That the force of a mine is always towards the W’eakeft fide *, fo that the difpofition of the chamber of a mine does not at all contribute to determine this effedl. 2. That the quantity of powder muft be greater or lefs, in proportion to the greater or lefs weight of the bodies to be raifed, and to their greater or lefs cohefion j fo that you are to allow for each cubic fathom Of loofe earth, - - 9 or lolb. Firm earth and ftrong fand, n or 12 Flat clayey earth, - 15 or 16 New mafonry, not ftrongly bound, 15 or 20 Old mafonry, well bound, 25 or 30 3. That the aperture, entonnoir of a mine, if rightly charged, is a cone, the diameter of whofe bafeis double the height taken from the centre of the mine. 4. That when the mine has been overcharged, its entonnoir is nearly cylindrical, the diameter of the upper extreme not much exceeding that of the chamber. 5. That be- fides the (hock of the powder againft the bodies it takes up, it likewife crulhes all the earth that borders upon it, both underneath and fidewife. To charge a mine fo as to have the moft advantage¬ ous effefl, the weight of the matter to be carried muft be known 5 that is, the folidity of a right cone, whofe bafe is double the height of the eaith over the centre of the mine : thus, having found the folidity of the cone in cubic fathoms, multiply the number of fathoms by the number of pounds of powder neceffary for raifing the matter it contains •, and if the cone contains matters of different weights, take a mean weight between them all, always having a regard to their degree of co- Minehead, hefion. Mineral. As to the difpofition of mines, there is but one gene- ' ral rule, which is, That the fide towards which one would determine the efFeft be the weakeft •, but this varies according to occafions and circumftances. The calculation of mines is generally built upon this hypothefis, That the ’entonnoir of a mine is the fruftum of an inverted cone, whofe altitude is equal to the radius of the excavation of the mine, and the diameter of the whole leffer bafe is equal to the line of leaft refiftance j and though thefe fuppofitions are not quite exadt, yet the calculations of mines deduced from them Have proved fuccefsful in praiftice} for which reafan this cal¬ culation (liould be followed till a better and more fimple be found out. M. de Valliere found that the entonnoir of a mine was a paraboloid, which is a folid generated by the rotation of a femiparabola about its axis ; but as the difference between thefe two is very infignifi- cant in pra6Hce, that of the fruftum of a cone may be ufed. MINEHEAD, a town of Somerfetfhire, 166 miles from London. It is an ancient borough, with a har¬ bour in the Briftol channel, near Dunfter caftle, much frequented by paffengers to and from Ireland. It was incorporated by Queen Elizabeth, with great privileges, on condition the corporation fhould keep the quay in re¬ pair ; but its trade falling off, the quay was neglected, and they loft their privileges. A ftatute was obtained in the reign of King William, for recovering the port, and keeping it in repair, by which they were to have the profits of the quay and pier for 36 years, which have been computed at about 200I. a-year; and they were at the expence of new-building the quay. In pur- fuance of another aft, confirming the former ; a new head has been built to the quay, the beach clear- ed, &c. fo that the biggeft fhip may enter, and ride fafe in the harbour. The town contains about 500 houfes, and 2000 fouls. It was formerly governed by a portreve, and now by two conftables chofen yearly at a court leet held by the lord of the manor. Its chief trade is with Ireland, from whence about 40 veffels ufed to come hither in a year with wool ; and about 400 chaldrons of poals are yearly imported at this place, Watchet, and Poriock, from South Wales, which lies direftly oppofite to it about feven leagues over, the common breadth of this channel all the way from Holmes to the Land’s End. Here are feveral rich merchants, who have fome trade alfo to Virginia and the Weft Indies 5 and they correfpond much rvith the merchants of Barneftaple and Briftol in thier foreign commerce. Three or four thoufand barrels of herrings, which come up the Severn in great Ihoals about Michael¬ mas, are caught, cured, and (hipped off here every year, for the Mediterranean, &$c. The market here is on Wednefday, and fair on Whitfun-Wednefday. MINERAL, in Natural Hijlory, is ufed in general for all foffil bodies, whether fimple or compound, dug out of a mine \ from whence it takes its denomination. See Mineralogy. Mineral Waters. All waters naturally impregnat¬ ed with any heterogeneous matter which they have dif- folved within the earth may be called mineral waters, iu 3 Mineral. MIN [ In tlie moft general and '■xtenfive meaning of that name; ' in which are therefore comprehended almoil: all thofe that flow within or upon the furface of the earth, for almoft all thefe contain fome earthy or faline matter. But, ftriflly fpeaking, thofe waters only which hold in folution fuch a quantity of foreign ingredients as to give them properties whfch are eafily recognized by the tafte or 121 ] M T N 'fmel: come under the denomination of mmeral waters. Mineral. For the methods of analyzing mineral waters, fee Chkmistry Index. Here wre^ lhall give a tabular view of the more re- markable mineral waters which have been dxfcovered and examined. An Alphabetical Table of the moft noted Mineral Waters in Europe, exhibiting their Medicinal Properties and Contents. Names of Springs. Abcourt, Countries in which they are found. Near St Germains in France. Aberbrothick, County of Forfar in Scotland. Aft on, Aghaloo, Middlefex county, England. Tyrone, Ireland. Aix-la-Cha- Juliers in Germany, pelle, Alford or Aw- Somerfetfliire, Eng- ford Alkeron Antrim, Baden, Bagnigge, Balimore, land. Yorklhire, in Eng¬ land. Ireland. Swabia in Germany. Middlefex, near Lon¬ don. Worceflerfhire in England. Ball, or Baud- Lincolnlhire in Eng- well, land. Balaruc, Languedoc in France. Ballycaftle, Antrim in Ireland. Ballynahinch, Down in Ireland. Ballyfpellan, Near Kilkenny in Ireland. l Vol. XIV. Part I. Contents and Quality of the Water, A cold chalybeate water, containing befides the iron a fmall quantity of foflil alkali faturated with fixed air. A cold chalybeate. Con¬ tains iron diffolved in fix¬ ed air. Contains Epfom and fea fait. Cold. Sulphur, foflil alkali, and * fome purging fait. Cojd. Sulphureous and hot. Con¬ tain aerated calcareous earth, fea fait, foflil al¬ kali, and fulphur. A purging fait along with fea fait. Cold. Contains Epfom fait, aerated calcareous earth, and ful- phur. Cold. Hot and fulphureous fprings and baths, refembling thofe of Aix-la Chapelle. Epfom fait and muriated magnefia. Cold. Ano¬ ther fpring contains iron and fixed air. A fine cold chalybeate, con¬ taining iron rendered fo- luble by fixed air, along with fome other fait fup- pofed to be foflil alkali. A cold petrifying water ; contains aerated calcare¬ ous earth or magnefia. Hot, and contain fome pur¬ ging falts. Chalybeate and fulphureous. Cold. Iron, fixed air, and fulphur. Cold. Iron, fixed air, and proba¬ bly foflil alkali. Medicinal Virtues. Diuretic and purgative. Internally ufed in dropfies, jaundice, and obftru&ions of the vifcera ; externally in fcorbutic eruptions, ulcers, &c. Diuretic and corroborative. Ufed in indigeftions, nervous diforders, &c. Strongly purgative, and caufes a forenefs in the fundament. Alterative and corroborant. Ufeful in fcrofulous diforders, worms, and cu¬ taneous difeafes. Diaphoretic, purgative, and diuretic. Uied as baths as well as taken in¬ ternally. Uleful in rheumatilms, and all difeafes proceeding from a debility of the fyftem. Strongly purgative. Diuretic. Ufeful when drunk in leprofy, and other cutaneous difeafes. Similar to Borrowdale water, but weak¬ er. See Aix-la-Chapklle, and Baden, in the order of the Alphabet. Strongly purgative, three half pints be¬ ing a dofe. The chalybeate fpring alfo proves purgative when the bowels contain any vitiated matter. Corroborative, and good in obrtru&ions of the vifcera. Drank from two to three pints in a morning. Corroborative and aftringent. Drunk to the quantity of two pints, or two and a half. Drank^as purgatives, and ufed as hot baths. Ufeful in fcrofulous and cuta¬ neous diforders. Refembles that of Balimore in virtue. Ufeful in fcorbutic diforders and difeafes of indigeftion. Similar in virtue to that of Balimore. & Bagneres, Names of Springs. Bagneres, Bareges, Barnet and Norlh-hall, Bath, Eandola, Borrowdale, i Brentwood, Briftol, Bromley, Broughton, Buxton, Caroline baths, Carlton, Carrickfergus, Carrickmore, Cafhmore, Caftle* Connel, Caftle-Let>d, M T N Countries in which theif are found. Bigorre in France. .[ 122 1 Contents and Quality of the Water. Earth and fulphur. Hot. Bigorre in France. Sea fait, foffil alkali, calca¬ reous earth, felenites, ful¬ phur, and a fine bitumi¬ nous oil. Hot. Hertford (l^ire in England. Somerfetfhire in England. Italy. Cumberland in Eng¬ land. Epfom fait, and aerated cal¬ careous earth. Iron, aerated calcareous earth, felenite, Glauber’s fait, and fea fait. Hot. Iron, fixed air, foffil alkali, and a little fulphur.— Cold. A great quantity of fea fait, aerated calcareous earth, and feme bittern. Cold.. Effex in England. Somerfetlhire in England. Epbm fait, and aerated calcareous earth. Calcareous earth, fea fait, Epfom fait, Glauber’s fait, and felenites. Hot. Kent in England. Iron and fixed air. Cold. Yorkffiire in Eng- Sulphur, fea fait, Epfom land. fait, and aerated earth. Cold. Derbylhire in Eng- A fmall quantity of fea land. fait, foffil alkali, Epfom fait, and aerated calcare¬ ous earth. Hot. Here is alfo a fine cold chaly¬ beate fpring. Bohemia. Iron, fixed air, aerated earth, fea fait, foffil alkali, Ep¬ fom fait, and Glauber’s fait. Hot. Iron diffolved in fixed air, along with a bituminous oil, which gives it the fmell of horfe dung.— Cold. Seems from its bluiffi colour to contain a very fmall quantity of copper. Cold. Foffil alkali, fixed air, and fome purging fait. Cold. Green vitriol. Iron dilfolved in fixed air, &c. Cold. Aerated earth, felenites, Glauber’s fait, and ful- phur. Cold. Nottingham (hire in England. Antrim in Ireland. ) Cavan in Ireland. Waterford in Ire¬ land. Limerick in Ireland. Rofs-ffiire in Scot¬ land. .MIN Medicinal Virtues. „ The waters ufed in baths, like thofe of Aix-la-Chapelle. Some of the fprings purgative, others diuretic. Diuretic and diaphoretic. Ufeful in nervous as well as cutaneous difor- ders, in old wounds and forne vene¬ real complaints. Ufed as baths, as well as taken internally to the quantity of a quart or three pints. Purgative. Powerfully corroborative, and very ufe¬ ful in all kinds of w’eakneffes. Ufed as a bath, and taken internally. Gently laxative, diuretic, and diaphore¬ tic. Strongly emetic and cathartic. Some¬ times ufeful in the jaundice and dropfy, feorbutre diforders, and chro¬ nic obftrudtions. Ufed likevvife as a bath in cutaneous difeafes. Taken in the dofe of a pint, containing only about feven drachms and a half of fea fait; fo that a great part of the virtue muff refide in the aerated calca¬ reous earth. Purgative. Ufed as a bath j and drank from four to eight ounces at a time, to two quarts per day. Ufeful in confumptions, dia¬ betes, fluor albus, &c. Diuretic and corroborative. Similar to Harrowgate. Ufeful in gout, rheumatifm, and other difoi'ders in which tepid baths are ferviceable. Ufed as baths, and drank to the quantity of five or fix" pints per day. Purgative, and ufed as baths. Of fer- vice in diforders of the ftomach and bowels, fcrofula, &c. Diuretic and corroborative. Weakly purgative. Purgative and diuretic. Purgative, diuretic, and fometimes eme¬ tic. Refembles the German Spaw, and is in confiderable repute. Diuretic, diaphoretic, and corroborant $ ufeful in cutaneous difeafes. Caftlcmain, Names of Springs* Caftlemain, Cawley, Cawthorp, Chadlington, Chaude Fon¬ taine, Cheltenham, Chippenham, Cleves, Clifton, Cobham, Codfalwood, Colchefter, Colurian, Comner, or Cumner, Coolauran, Corflorphine, Coventry, Crickle Spaw, Croft, Crofstown, Cunley-houfe, Das Wild Bad, D’ ax en Foix, Deddington, Derby, Derryinch, Derrindaff, MIN Countries in which they arc found. Kerry in Ireland. Derbylhire in Eng¬ land. Lincolnlhire in Eng¬ land. OxfordIhire in Eng¬ land. Liege in Germany, Gloucefterlhire in England. Wiltfhire in Eng¬ land. Germany. Oxfordfhire in Eng¬ land. Surry in England. Staffordlhire in Eng¬ land. Eflex in England. Cornwall in Eng¬ land. Berkfhire in Eng¬ land. Fermanagh in Ire¬ land. Mid Lothian in Scotland. Warwicklhire in England. Lancalhire in Eng¬ land,. Yorkfhire in Eng¬ land. Waterford in Ire¬ land. Lancalhire in Eng¬ land. Nuremberg in Ger¬ many. 15leagues fromThou- loufe in France. Oxford in England. Near the capital of Derby (hi re in Eng¬ land. Fermanagh in Ire¬ land. Cavan in Ireland. [ 123 ] Contents and Quality of the Water. Iron, fulphur, and fixed air. Cold. Epfom fait, aerated calca¬ reous earth, and fulphur. Cold. Iron, fixed air, and proba¬ bly foflil alkali. Cold. Foflil alkali, fea fait, and fulphur. Cold. Aerated earth, foffil alka¬ li, and fixed air. Hot. Calcareous earth, iron, Ep¬ fom fait, and common fait. Cold, Iron diffolved in fixed air. M I N Medicinal Virtues. Corroborant and diuretic. Gently purgative. Purgative, and corre&s acidities. Purgative. Refembles thofe of Aix-la-Chapelle and Buxton. Purgative and corroborant $ taken in the quantity of from one to three or four pints. It is ufeful in cafes of in- digeflion and fcorbutic diforders $ alfo in the gravel. Diuretic and corroborative. Iron, fixed air, and other ingredients of Pyrmont water. Foffil alkali, and aerated calcareous earth or fele- nite. Cold. Iron, and fome purging fait. Sulphur, fixed air, and ae¬ rated earth. Epfom fait, and aerated cal¬ careous earth. ' Iron, fixed air, and aerated earth. Some purging fait, and pro¬ bably aerated earth *, the water is of a whitilh co¬ lour. Iron, fixed air, and aerated earth. Sulphur, fea fait, clay, and Epfom fait. Cold. Iron, fixed air, and fome purging fait. Sulphur, fea fait, and aerated earth. Aerated 'earth, vitriolated magnefia, and fea fait. Martial vitriol. Sulphur, aerated earth, and fixed air. Iron, fixed air, and fome fa- line matter. Similar to Aix-la Chapelle. Hot. Iron, fulphur, aerated earth, fea fait, or foffil alkali. Iron diflblved by fixed air. Diuretic and corroborant. Gently laxative, and ufed as a bath for cutaneous diforders. Purgative, diuretic, and corroborant. Refembles the Alkeron water. % Strongly purgative. Corroborative and diuretic. Purgative, in the quantity of one, two, or three quarts. Diuretic. Diuretic and laxative. » Purgative, diuretic, and corroborant. Purgative, and refembling Harrowgatc water. Purgative, and refembling Afkeron wa¬ ter. Diuretic, purgative, and fometimes eme¬ tic. Purgative, and refembling the Alkeron water. Corroborant. Ufeful in obftruftions of the vifcera, and female complaints. Ufed as a bath, and alfo drank, like the Aix-la-Chapelle waters. Alterative, purgative in large quantity, and ufeful in fcorbutic and cutaneous diforders. Corroborant. Sulphur and foflil alkali. Diuretic and diaphoretic. Sulphur and purging fait. Similar to the Afkeron water. (,) 2 Derrylefter Names of Springs, Derrylefter, Dog and Duck, Dortftul], DrigwelJ, Dropping- well, Drumas-nave, Drumgoon, Dublin fait fprings, Dulwich, Dunnard, Dunfe, Durham, Egra, Eplbm, Fairburn, Felflead, Filab, Frankfort, Gainlborough, Galway, Glanmile, Glaftonbury, Glendy, Granfhaw, Haigh, Hampftead, Hanbridge, M I N Countries in which they are found. Cavan in Ireland. St George’s Fields, London. [ J24 ] Contents and Quality of the Water. Similar to Swadlinghar wa¬ ter. Aerated magnefia, Epfom fait, and fea fait. Stafforddiire in Eng¬ land. Cumberland in Eng¬ land. York (hi re in Eng¬ land. Leitrim in Ireland. Iron dilfolved in fixed air. Similar to Deddington. Aerated earth. Sulphur, foffil alkali, with fome purging fait. Fermanagh in Ire- Similar to the former, land. Ireland. Sea fait and Epfom fait. M I N Medicinal Virtues. Cooling and purgative, but apt to bring on or increafe the fiuor albus in wo¬ men. Corroborant. Aftringent and corroborant. Powerfully diuretic and anthelmintic, and of ufe in cutaneous and fcrofulous dif- orders. Purgative. Kent in England. Sea fait and Epfom fait. 18 miles from Dub¬ lin. Scotland. England. Bohemia. Surry in England. Rofs-fhire in Scot¬ land. Elfex in England. Yorkfhire in Eng¬ land. Germany. Lincolnlhire in Eng¬ land. Ireland. Ireland. Somerfetlhire in England. Merns county in Scotland. Down in Ireland. Lancafhire in Eng¬ land. England. Lancafhire in Eng¬ land, Iron diffolved in fixed air. Iron diffolved in fixed air, with a little fea fait and bittern. Sulphur, fea-falt, and a little aerated earth. In the mid¬ dle of the river is a fait fpring. Similar to Cheltenham wa¬ ter. Vitriolated and muriated magnefia, with a fmall quantity of aerated calca¬ reous earth. Sulphur, aerated earth, and Glauber’s falls. Similar to Iflington. Sea fait and aerated earth. Sulphur and fea fait. Sulphur, iron, aerated earth, and Epfom fait. Similar to Tunbridge wa¬ ter. Similar to Peterhead water. Similar to Clifton water. Similar to Peterhead water. I . • Iron \ fimilar to the German Spaw. Green vitriol, iron diffolved by fixed air, W'ith fome aerated earth. Green vitriol, iron diffol¬ ved by fixed air, and a fmall quantity of aerated earth. Similar to Scarborough wa¬ ter. Purgative and diuretic. Ufeful in Yier- vous cafes and difeafes proceeding from debility. Diuretic and corroborant. * Similar to the former. Similar to the HarrowTgate water.—. That of the fait fpring ufed as a pur¬ gative. Purgative, and of ufe in wafhing old fores. Alterative, and ufeful in cutaneous dif eafes. Powerfully diuretic and purgative. Similar to Harrowgate. Diuretic and laxative. Emetic and cathartic. Alterative and corroborant. The water is taken from half a pint to feveral pints 5 is better in the morning than in the middle of the day, and in cold than hot weather. Lefs purgative than the Scarborough water. Hanlys, Names of Springs. Hanlys, Harrowgate, Hartfell, Hartlepool, Holt, Jofeph’s well, Ilmington, Inglewhite, Iflington, • Kanturk, Kedleftone, Kenfington, Kilbrew, Kilburn, Killaflier, Killingfhanval- Kilroot, Kinalton, Kincardine, Kingfcliff, Kirby, Knarefborough, Knowfley, Kuka, Lancafter, Latham, M I N Countries in which they are found. Shropihire in Eng¬ land. Yorkflaire in Eng¬ land. Annandale in Scot¬ land. Durham in England. Wiltlhire in Eng¬ land. Stock Common near Cobham in Surry. [ 125 1 Contents and Qualities of the • Water. Epfom, or other purging fait. Sulphur, fea fait, and feme purging fait. Some cha¬ lybeate fprings here alfo. Green vitriol, alum, and azotic gas. Sulphur, iron diffblved by fixed air, with fome pur¬ ging fait. Purging fait, with a large quantity of aerated earth. A very large pro-portion of Epfom fait, and poflibly a little fea fait. Warkwickfiiire in England. Lancalhire in Eng¬ land. * Near London. Aerated foffil alkali, with fome ifcsn diffolved by fix¬ ed ah Sulphuo, and iron diflblved by fixed air. Iron diffolved by fixed air. Cork in Ireland. Derbyfhire in Eng¬ land. Near London. Meath in Ireland. Near London. Fermanagh in Ire¬ land. Fermanagh, Ireland. Antrim in Ireland. Nottinghamlhire in England. Merns in Scotland. Northamptonlhire in England. Weftmorland in England. See Dropping-well. Lancalhire in Eng¬ land. Bohemia. Similar to the water at Pe¬ terhead. Sulphur, fea fait, and aera¬ ted earth. Similar to Afton water. A large quantity of green vitriol. Fixed air, hepatic air, Ep¬ fom fait, Glauber’s fait j muriated magnefia, fea fait, aerated earth, and iron. Sulphur and foflil alkali. Similar to Hanlys chalybeate water. Nature of Barrowdale W7a- ter, but weaker. A purging fait. Similar to the water of Pe¬ terhead. Similar to Cheltenham wa¬ ters. Iron, fixed air, and probably fome foflil alkali. Similar to Scarborough wa¬ ter. Aerated fixed alkali. England. Lancafhire in Eng¬ land, Similar to Tunbridge water. Similar to the former. MIN Medicinal Virtues. Purgative, Alterative, purgative, and anthelmintic j ufeful in feurvy, fcrophula, and cuta¬ neous difeafes. Ufed externally for ftrains and paralytic weakneffes. Aftringent and corroborant. Ufeful in all kinds of inward difeharges o£ blood. Diuretic and laxative. Mildly purgative. Ufeful in old ulcers and cutaneous diforders. Alterative, purgative, and diuretic. Drank to about a quart, it paffes brilkly without griping : taken in - lefs dofes as an alterative, it is a good antifcorbutic. Diuretic and laxative. Alterative. Ufeful in fcorbutic and cu-f taneous difeafes. Corroborant. Ufeful in lownefs of fpi- rits and nervous difeafes. Operates by urine, and may be drank in large quantity. Similar to Harrowgate j but intolerably ~ fetid. Emetic and cathartic, in the dofe of half a pint. Similar to Swadlingbar water. Purgative. Laxative, and ufeful in corre£Hng aci dities. . ' Operates by infenfible perfpiration, lome- times by fpitting, fweat or urine. Llandrindod^ M I N Medicinal Virtues. Names oj Springs. Llandrindod, Llangybi, Leamington, Leez, Lincom b Lifbeak, Lis done- Vurna, Loanfbury, Maccroomp, Mahereberge, Mallow, Malton, Malvern, Marklhall, Matlock, Maudfley, Meehan, Miller’s Spaw, Moffat, Mofs-houfe, Moreton, M I N Countries in which they are found. Radnor in South Wales. Caernarvonrtiire in North Wales. Warkwicklhire in ■ England. Effex in England. Somerfetfliire in Englajad. Fermanagh in Ireland Clare in Ireland. Yorklhire in Eng¬ land. Cork in Ireland. Kerry in Ireland. Cork in Ireland. York (hire in Eng¬ land. Gloucefterfhire in England. Effex in England. Derbylhire in Eng¬ land. Lancafhire in Eng¬ land. Fermanagh in Ire¬ land. Lancalhire in Eng¬ land. Annandale in Scot¬ land. Lancafhire in Eng¬ land. Shropfhire in Eng¬ land. [ 126 ] Contents and Quality of the Water. Three fprings $ a purgative, a fulphureous, and chaly¬ beate. Sea-falt and aei -i :ed calcare¬ ous earth. Similar to Iflington water. Aerated iron, foffil alkali, and a little Epfom fait. Sulphur, &c. Foltil alkali, with much iron. Sulphur, and fome purging fait. Similar to Ilmington water. Similar to Borrowdale wa¬ ter. A hot water, fimilar to that of Briflol. Iron and fixed air inco?Ifider- able quantity. Iron. Two fprings. Similar to Iflington. Warm fprings, of the na¬ ture of the Briflol water, except that they are very flightly impregnated with iron, but contain a great quantity of aerated earth. They are colder than the Buxton; but their vir¬ tues fimilar to thofe of the two places mentioned. Sulphur and fea fait. Sulphur and foffil alkali. Similar to Tunbridge. Sulphurated hydrogen, car¬ bonic acid and azotic ga- fes, with common fait. Similar to Iflington water. Similar to Holt water. Ufeful in the feurvy, leprofy, cutaneous diforders, &c. Ufeful in diforders of the eyes, fcrofula, &c. Emetic and cathartic. Ufeful in old fores, and cures mangy dogs. Similar to Swadlingbar water. Emetic, cathartic, and diuretic. Ufed only for wafhing mangy dogs and fcabby horfes. Similar to Scarborough water, but is fometimes apt to vomit. Diuretic and cathartic ; ufed alfo ex¬ ternally. Recommended as excel¬ lent in difeafes of the fkin ; in lepro- fies, fcorbutic complaints, fcrofula, old fores, &c. Alfo ferviceable in in¬ flammations and other difeafes of the eyes j in the gout and ftone, in bi¬ lious and paralytic cafes, and in fe¬ male obfiruftions. The external ufe is by wafhing the part at the fpout feveral times a-day, and afterwards covering it with cloths dipt in the water and kept conllantly moift j al¬ fo by general bathing. Similar to Harrowgate. Similar to the waters of Drumgoon. Alterant, diuretic, and fometimes pur¬ gative. Is ufed as a bath, and the {team of the hot water has been found ferviceable in relaxing hard tumors and ftiff joints. Purges ftrongly. Mount Names of Springs. Mount d’Or, Nevil Holt, New Cartmall Newnham Re- gls» Newtondale, Newton-Stew¬ art, Nezdenice, Nobber, Normanby, Nottington, Orfton, Oulton, Given Breun, Pancras, Pafiy, Peterhead, Pettigoe, Pitkeathly, Plombiers, Pontgibault, Pougues, Pyrmcnt, Q^ueen Carael, Richmond, Rippon,. M I N Countries in which they are found. France. Leicefterfiiire in England. [ 127] Contents and Quality of the Water. Warm, and fimilar to the waters of Aix-la-Cha- pelle. Selenite or aerated earth, and Epfom fait. Lancafhire in Eng¬ land. Warwick (hire in England. Yorkfhire in Eng¬ land. Tyrone in Ireland. Sea fait and aerated earth. Similar to Scarborough wa¬ ter. Aerated calcareous earth or magnefia. Similar to Tunbridge. Germany. Meath In Ireland. Yorkfhire in Eng¬ land. Dcrfetfhire, Eng¬ land. Nottingham, Eng¬ land. Norfolk, England. Cavan, Ireland. Near London. Near Paiis. Aberdeen county, Scotland. Donnegal, Ireland. Perthlhire, Scotland. Lorraine, France. Auvergne, France. Nivernois, France. Wedphalia, Germa¬ ny. Fixed air, foflil alkali, iron, and earth. Martial vitriol. Sulphur, much fixed air, fome fea fait, and Epfom fait. Sulphur, foflil alkali, and earth. Much fixed air, Epfom fait, and a little fea fait, with fome iron. Similar to Iflington. Sulphur, Epfom fait, and foflil alkali. Epfom fait, and aerated earth. Similar to Pyrmont water. A firong chalybeate, but of which no analyfis has been publifhed. Sulphur and purging fait. Sea fait, a fmall quantity of muriated and likevvife of aerated earth. Saline matter, probably fof- fil alkali, with a fmall por¬ tion of oil.—Warm. Foflil alkali and calcareous earth. Calcareous earth, magnefia, foflil alkali, fea lalt, earth of alum, and filiceous earth. Aerated iron, calcareous earth, magnefia, Epfom fait, and common fait.. Somerfetlhire, Eng- Sulphur, fea fait, foflil al- land. kali, calcareous earth, and bituminous oil. Surry in England. Similar to Atton water. Yorkihire, England. Sulphur, fea fait, and aerat¬ ed earth. M I N Medicinal Virtues. Diuretic, purgative, and diaphoretic. Purgative, diuretic, and diaphoretic.-— Powerfully antifeptic in putrid dif- eafes, and excellent in diarrhoea, dy» fenteries, &c. Purgative. Aftringent or tonic. Diuretic, diaphoretic, and tonic. Similar to Hartfell. Similar to Aikeron water. Ufeful in cutaneous difeafes. Purgative.—-It intoxicates by reafon of the great quantity of air contained in it. Similar to Aikeron water- Diuretic and purgative. Similar to Iflington, but more powe# ful. Similar to Aikeron water. Gently purgative. Very ufeful in fcro- fulous and fcorbutic habits. Ufed as a bath, and for walhing ulcers. Inwardly taken it cures complaints from acidity, hemorrhagies, &c. Diuretic and laxative. Diuretic and laxative. . Diuretic, diaphoretic, and laxative. Re¬ commended in cafes where the con- llitution is relaxed; in female com¬ plaints, in cutaneous difeafes, in ner¬ vous diforders, in the gravel and uri¬ nary obllrudlions ; and conlidered as among the belt reftoratives in decayed and broken conftitutions. Ufed in fcrofulous and cutaneous difor¬ ders. Diaphoretic and alterant. Road, Names of Springs. Road, St Bartholo¬ mew’s well, St Bernard’s well, St Erafmus’s well, Scarborough, Scollienfis, Seidlitz, Seltzer, Sene, or Send, Seydfchutz, Shad well, Shapmoor, Shettled’ood, Shipton, Somerfham, Spaw, Stanger, Stenfield, S reatham, Suchaloza, Sutton bog, Swadlingbar, Swanfey, -Sydenham, Tarleton, Tewkfbury, Thetford, Thoroton, Thurlk, Tibfhelf, MIN [ 128 ] Countries is which Contents and Quality of the they are found. Water. Wiltlhire, England. Sulphur, iron, fofiil alkali, and fixed air. Cork in Ireland. Foffil alkali, iron, and fixed air. Near Edinburgh. Similar to the waters of Moffat. Staffordfhire, Eng¬ land. Yorklhire, England. Switzerland. Bohemia. Germany. Wiltfhire, England. Germany. Near London. Weftmorland, Eng¬ land. Derbylhire, Eng¬ land. Yorkfhire, England. Huntingdonfhire, England. Liege in Germany. Gumberland, Eng¬ land. Lincolnlhire, Eng¬ land. Surry, England. Hungary. Oxfordlhire, Eng- . land. Cavan in Ireland. Glamorganihire in North Wales. Kent in England. Lancalhire in Eng¬ land. Gloucefterfhire in England. Norfolk in England. Nottinghamihire in England. Yorkihire in Eng¬ land. Derbyihire in Eng¬ land. 3 Aerated calcareous earth, Epfom fait, fea fait, and iron. Iron, foffil alkali, and a great quantity of fixed air. Epfom fait. Calcareous earth, magnefia, foffil alkali, and fixed air. Similar to Iflington. Similar to'Seidlitz. Green vitriol. Sulphur and purging fait. Sulphur, fea fait, and pur¬ ging fait. Green vitriol, alum, and fix¬ ed air. Foffil alkali, iron, aerated earth, Epfom fait, and fea fait. Green vitriol. Similar to Orflon. Aerated earth, Epfom fait, fea fait, and muriated mag¬ nefia. Sulphur, foffil alkali, and fea fait. Sulphur, earth, fea fait, and foffil alkali. Green vitriol. Similar to Epfom, but weak¬ er. Similar to Scarborough wa¬ ter. Similar to Adton. Foflil alkali, fixed air, and iron. Similar to Orfton. Similar to Scarborough. Iron diffolved in fixed air. M I N Medicinal Virtues. Ufeful in fcrofula, fcurvy, and cutaneous diforders.—Adis as a laxative. Similar to Tilbury water. Somewhat congenial with Moffat and Harrovvgate. In nervous and fto- machic cafes, analeptic and reftora- tive *, in fcorbutic, fcrofulous, and molt dropfical cafes, reckoned a fpe- cific. Similar to Borrowdale water. Diuretic and purgative. Excellent in colic pains, both as a cure and preventive* Strongly purgative. Diuretic. Ufeful in the gravel, rheuma- tifm, fcurvy, fcrofula, &c. Emetic and cathartic. Similar to Afkeron w'ater. Similar to Harrowgate water. Similar to Harrowgate. Corroborant and alterative. Ufeful for walking foul ulcers and cancers. Diuretic and purgative. Serviceable in many diforders. See the article Spaw. Emetic and cathartic. Purgative. Similar to Nezdenice. Alterative and laxative. Alterative and diaphoretic. Similar to Shadwell. Purgative and diuretic. Similar to Spaw water. Tilbury Names of Springs. Tilbury, Tober Bony, Tonftein, Tralee, Tunbridge, Upminfter, Vahls, Wardrew, Weatherilack, Wallenfrow, Weft Afhton, Weftwood, Wexford, Whiteacre, Wigglefworth, Wildungan, Windgate Spaw, Witham, Wirkfworth, Zahorovice, M I N Countries in which they are found. Effex in England. Near Dublin in Ire¬ land. Cologne in Germany. Kerry in Ireland. Kent in England. EAex in England. Daupbiny in France. Northumberland. Weftmorland in Eng¬ land. Northamptonftiire in England. WiltAiire in Eng¬ land. Derbyftiire in Eng¬ land. Ireland. Lancalhire in Eng¬ land. Yorkfhire in Eng¬ land. Waldech in Germa¬ ny. Northumberland, Eflex in England. DerbyAiire in Eng¬ land. Germany. [ 129 1 Contents and Quality of the Water. Foftil alkali. Foflil'alkali, earth, and bi¬ tuminous oil. Foftil alkali. Similar to Caftle Connel. Iron, fome fea fait, with a little felenites and calca¬ reous earth. Sulphur, foflil alkali, and purging fait. Foflil alkali. Sulphur, earth, and fea fait. Iron, fea fait, and a fmall quantity of hepatic gas. Similar to Iflington water. Similar to Iflington. Green vitriol. Similar to Iflington. Aerated iron, and probably calcareous earth. Sulphur, earth, and common fait. Similar to the waters of Bath. Carbonate of iron, green vi¬ triol, alum, common fait, calcareous earth. Aerated iron, and common fait. Sulphur, purging fait, and aerated iron. Similar to Nezdenice water. M I N - Medicinal Virtues. Diuretic and diaphoretic. Similar to Tilbury. Similar to Seltzer, but mare purgative. An excellent chalybeate, ufeful in all difeafes for which the Spaw is recom¬ mended. Purgative and diuretic. Diuretic and laxative. Similar to Harrowgate water. Purgative. Similar to Shadwell. Ufed for walhing ulcers of the legs. Somewhat aftringent. Emetic in the quantity of two quarts, and faid to be cathartic in the quantity of three ; a Angular circumftance if true. Ufeful in fcorbutic and gouty difeafes. Corroborant and diuretic \ and ufeful in ftoimch complaints and fcrofula. Diuretic, alterative, and corroborant. Ufeful in fcrofulous and cutaneous difeafes. Much eftecmed in fcrofuluus cafes. t MINERALOGY. * Definition. 2 Hiftory. TV/TINERALOGY is that branch of natural hiftory which has for its object the defcription and difrri- mination of inorganized or mineral fubftances, as they are found in the earth or on its furface. The knowledge of fome mineral bodies may be con- fidered as coeval with the earlieft ages of the world. The rudeft and moft barbarous nations could not be ignorant of fome of the properties of the fubftances which w'ere moft familiar to their obfervation ; and man¬ kind have made little progrefs in civilization, when they are entirely unacquainted W'ith the nature of thofe matters from which fome of the metals are extrac¬ ted. Precious ftones, it feems not at all improbable, firft attracled the notice of mankind. The richnefs of colour, brilliancy, luftre, and durability of thefe bodies, could not fail to excite admiration, and make them be fought after as ornaments, even by the leaft civilized people, and in countries where they are moft abundant. 1 hey were well known, it would appear from the facred Vol. XIV. Part I. writings, among the Jew's and Egyptians in the time of Mofes. At this period, however, both the Jews and Egyptians had advanced far in refinement. But this knowledge w7as too limited to be dignified with the name of Mineralogy. It wanted that compre- henfive, connedled, and fcientific view which could entitle it to that denomination. And indeed it may be faid to be only of modern date that the knowdedge of minerals rofe to the rank of fcience, and aflumed any thing like a regular and conneifted form. Diofcorides and Theophraftus among the Greeks, and Writers on Pliny among the Romans, have, it is true, defcribed a minerals, few mineral bodies; and Avicenna, an Arabian philo- fopher and phyfician, who flonrifhed in the end of the 10th and beginning of the 1 ith century, arranged thofe objefts into four great claffes, viz. 1. Stony bodies. 2. Saline bodies. 3. Inflammable bodies j and 4. Metals —an arrangement, which, it is curious to remark, muft be well-founded j for it has been adopted, femetimes in¬ deed wfith flight deviatiotis, by almoft all mineralogical R writers 1 0 MINERALOGY. 150 Hiftoty. writers fince that period. But ft ill the knowledge of minerals was bounded by very narrow limits. The variety and value of mineral productions in Ger¬ many have excited more attention to thefe iludies, and have thus rendered this knowledge of more intereli and importance than in any other country. To Germany indeed it mult be acknowledged that mineralogy is in¬ debted in a great meafure for its origin, and for a very ample (hare of its progreffive improvement. George j. A Agricola, a native oi Mifnia, in Tvhich country he fet¬ tled as a phyfician, lived during the firft half of the 36th century. Being ftrongly attached by inclination to the Itudy of minerals, he removed- to Chemnitz in Hungary, where he might have an opportunity of pro- lecuting his favourite Hudies ; and there, by the molt un¬ wearied application to mineralogy, and particularly to the various operations on the metals, he became the molt, celebrated metallurgilt of his time. He is fuppofed to be the firft German author who profeffedly wrote on mineral fubftances. The following titlps chielly comprehend the various heads into which his works on metallurgy and mineralogy are divided, De Ortu et Caufis Subter- raneorum ; De Natura eorum quce affluunt ex Terra ; De Natura Tojfilium; de Medicatis Fontibus : De Sub- terraneis Anwwntibus ; De Vetenbus et Navis Metalhs ; and De Re Metallica. His arrangement of minerals is into two great divifions. 1. Simple or Homogeneous Minerals •, and 2. Heterogeneous Minerals. The firft, or fimple minerals, includes four fubdivilions, viz. I. Ter¬ ra j 2. Succus Concretus *, 3. Lapis; 4. Metallum. The fecond great divifion, the heterogeneous minerals, comprehends two fubdivilions, viz. 1. Compound mine¬ rals ; 2. Mixed minerals. Beecher. Several writers on mineralogy appeared in the courfe of the 17th century ; and about the beginning of the 18th Beecher propofed an arrangement of bodies on g chemical principles, or according to their conllituent Linaams. parts. In the year 1736, Linnaeus publiihed a fyftem of mineralogy, in which mineral bodies are divided into three clafies, viz. 1. Petra; 2. Mitiera; 3. FoJJilia. Thefe are fubdivided into orders : the firft containing three, Vitrefcentes, Calcarca, Apyrce; the fecond con¬ taining three, Salta, Sulphurea, Mercurialia; and the third alfo containing three, Concreta, PetrifaDa, Terror. Three years afterwards the fyftem of Cramer appeared, according to wThich all mineral fubftances are arranged into feven claffes, of which the following are the titles. I. Metals; 2. Semimetals; 3. Salts; 4. Inflammable fubftances; 5. Stones; 6. Earths; and 7. Waters. About xo years after the firft publication of the mineral Walkri-us tyhem °f Lmnteuc, Wallerius profeffor of mineralogy at (Jpfal, and his cotemporary, communicated to the wo: id a more enlarged and improved arrangement of mineral bodies than any which had hitherto appeared. According to the fyftem of Wallerius, all minerals are diftributed into four clafies, each of which is fubdivided into four orders. The firft clafs, Terror, includes the orders Macrce, Pingues, Minerales, and Arenaceoe; to the fecond clats, Lapides, belong the orders Calcarei, Vi refeentes, Apyri, Saxa ; the third clafs, Minercr, comprehends the orders Sa/ia, Sulphurca, Semimetal/a and Metalla ; and the fourth, Concreta, is compofed of the orders Port, PetrifaBa, Figurata, and Calculi. Of 'he fyftematic writers on mineralogy from the time of Linnapus, which have now been mentioned, and of others which the limits of this hiftorical Iketch do Hiftory. not permit us to nonce, it is to be ouierved, that by all •*—v——J of them, although the general arrangement oi Avi¬ cenna was not followed, yet in the luboidinate divifions his clafles were adopted, a mb conftituted fume of their g orders. The clafies ol Avicenna were not reilored till Cronftedt. the time or Cronftedt, a Swedilh mineralogilt, in whole fyttem, which w;as publithed in the year 1758, they re¬ lumed the place which they formerly held. The lyllem ol Cronftedt is divided into four claifes, Terra, Salta, Phlogi/hca, and Metaila. The firft clafs, Terror, includes 9 orders, Calcareoe, Stltcea, Granatinoe, Argillaceoe, Micaccoe, Fluores, Ajbpjhrue, 'Leoltticcr, and Magnejioe. To the lecond clais, Salia, belong two orders, Acida and Alkalina. The third clais, Phlogtjlica, coufiits only of one order; and the fourth clais, Metalla, is compoled of two orders, Metalla perfect a and Semirne- talla. The fyftem of Cronftedt, the ;'.oft complete which had yet been eft'ered to the world, and which, by comparing it W’ith the fyftems accounted by feme the molt perfect of the prefent day, will be found not much different in its arrangement, continued to be read and ftudied for more than tw-enty years, and was tranf- lated into different languages. This arrangement is founded on chemical principles. The firft clafs, for mitance, is divided into nine orders already enumerated, and correfponding, as he fuppofed, to nine earths, of one of which the itones included in each order are chiefly compoied. But as the improvements in chemical analyiis led to greater accuracy of inveftigation, the earths which Cronftedt fuppofed to be fimple were found to be compound. The number of fimple or primitive earths was then diminifhed to five ; and thus the number of 6 genera, as they appeared in the Sciagraphia Regni Mi- neralis of Bergman, publilhed in 1782, was alio five,' At that period five earths only were known. The fame method of conftrudllng the genera is ftill followed, fo that the number of genera has increafed in proportion to the number of earths which have been fince dilcovered. In the year 1780, a tranflat'on of Cronftedt’s mineral fyftem appeared in Geimany, accompanied with notes by Werner, the celebrated profeffor of mineralogy at Freyberg in Saxony. Six years before this time Werner had publilhed a feparate treatife on the claflification of minerals, in which he exhibited his method of deferibing them by means of external characters. The notes on Cronftedt’s lyflem are to be cunlidered as a farther illufi• tration of this method, as well as a catalogue of minerals belonging to Pabft Von Chain, wfliich was drawn up by the fame naturalift and publilhed in 1791. In Germany the method of Werner, we believe, is almoft exclufively adopted ; and it is chiefly followed in moil other coun¬ tries, France excepted, where mineralogical knowledge is alfo greatly cultivated. Mr Kirwan firft introduced the knowledge of thisKirwan. fyftem into Britain, in his treatife on mineralogy pub¬ lilhed in 1784; and about ten years afterwards it was ftill farther elucidated by the fame author in an impro¬ ved and enlarged edition of that work. In preparing the latter edition, Mr Kirwan enjoyed the peculiar ad¬ vantage of confulting one of the complete!! and belt arranged coile&ions of minerals which had yet been made in any country. This is the Lelkean colledtion fcean of foflils, which Mr Kirwan pronounces to be the moft caiieClion perfect monument of mineralogical ability now extant, of minerals. “ That v\ MINER Hiftory. (i Tliat tlie poflefTion of this cabinet, Mr Kirwan proceeds ^ r—J to (late, fliould efcape the vigilance of the moft learned nations, and fall to the lot of Ireland, hitherto fo inat¬ tentive to matters of this nature, was little to be expec¬ ted. Through the aclive zeal however of two of its moft enlightened patriots (a), and the influence fecured to them by former fervices of the moft effential nature, the funis requifite for its purchafe, and for building a re- # Preface politory to receive it, were obtained Tims fplen- to Mine- did and extenfive collection, we are farther inform- ralogy, ^ was made by Leike whofe name it now bears, and p'1Xl who was one of the earlieft and moft eminent of the difciples of Werner. It was arranged between the years 178 2 and 1787, according to the principles of Werner, and with his afliftance. After the death of Mr Leike, a catalogue was drawn up by Karften ano¬ ther of Werner’s difciples. This catalogue in its arrange¬ ment correfponds to the arrangement of the cabinet, which is divided into five parts. The firft part, which is denominated the charaEleriJHc part, confifts of 5S0 fpecimens. Thefe are intended for the illuftration of the external charafters or the princi¬ ples of the claffification. The fecond, which is the fuftematic or oryClognoftic part, comprehends all fimple minerals diftnbuted accor¬ ding to their genera and fpecies agreeable to the method then followed by Werner. This part contains 3268 Ipecimens. ' The third part, which is Called geognojlic ox geo¬ logical, includes the fubftances found in the different kinds of rocks, as they are divided into primitive, tran- fuion, Jlratiform, alluvial, and volcanic mountains. This part of the colle&ion is peculiarly rich in petrifac¬ tions; and the whole number of fpecimens which it con¬ tains extends to 1100. The fourth part is intended to illuftrate the minera- logy of every country on the globe, by exhibiting its mineral produttions. The order of arrangement of this part is from America to Afia, Europe, and Africa. As there are many countries yet unexplored, it is the moft imperfeft divifion of the whole colleftion ; and indeed, as Mr Kirwan obferves, it can only be com¬ pleted by national opulence. The "fifth part is called the economical collodion. It is formed of 474 fpecimens of minerals which are employed in arts and manufa&ures, as in architefture, f’cuipture, agriculture, jewellery, colouring, dyeing, cloathing, pottery, glazing, enamelling, poliihing of metals, furnace building, medicine, metallurgy, &c. The whole cabinet confifts of 7331 fpecimens. Such is the valuable fource from which Mr Kirwan derived the information detailed in his fyftem of minera¬ logy. And here vre are led to throw out a hint that the friends of this fcience could not more effedually promote its knowledge, and encourage its progrels, than by eftablllhing frtnilar colledions wherever it is taught and ftudied. But patriotifm and power are unfortu¬ nately oftener dire&ed to deeds of fplendour and magni¬ ficence, than they are occupied in forming and accom- A L O G Y. i3f piilhing the humbler and mbre permanent plans of na- Hiftory. tionai utility. "~"Y But to refume our narrative of the hiftory of minera¬ logy, we cannot help expreffing our regret that Mr Kir¬ wan has never found it convenient to revife and improve his fyftem as he might have done, aided by the immenfe flock of mineralogical knowledge which has been ac¬ cumulated iince its firft publication. This is the more to be regretted, becaufe, noiwuhftanding the rapid pro- grefs of the fcience, and the great improvements which the fyftem of Werner has received, no good or even tolerable account of it has yet appeared in the Engliftv language. France, where many branches of natural hiftory have long fiouriihed, has contributed largely to the fcience of mineralogy. Even the period of war, which at firfb fight would appear to be extremely adverfe to the tran¬ quil purfuits of knowledge, has in this cafe proved pe¬ culiarly favourable to the ftudy of mineralogy in that kingdom. The knowledge of minerals has not only been encouraged and promoted in France, by being for¬ ced to diredl her attention to her own refources, while her intercourfe with other countries from which Ihe derived various commodities indifpenfibly neceffary for economical purpofes was interrupted ; but alfo by the fubjugation to her overgrown power, of thofe parts of Europe where mineralogy has been moft cultivated and improved, thus affording every facility of corre- fpondence, and rendering acceflible thofe mineral trea- fures which exhibit the beft and fulleft illuftration of the fcience. The French government, indeed, what¬ ever form it may have affirmed, has invariably been im- preffed with the importance of mineralogy ; and even during the horrors of revolution, has never failed to promote its progrels, by forming and fupporting extenfive colledtions, and eftabliihing able and enlight¬ ened teachers at the expence of the nation. Of the works on mineralogy which have appeared in France, we {hall only mention the treatifes of Brochant, Hauy, and Brongniart. They are the fources from which the information in the following treatife is chiefly derived, and they may be recommended as the beft guides to the ftudy of this department of natural hiftory. The fyftem of Brochant is formed entirely on the prin- Brochaat. ciples of Werner’s claftification, and is undoubtedly the moft perfpicuous account of the fyftem of the German mincralogift which has yet been publiihed. The prin¬ ciples on winch the elaborate and ingenious method of arrangement propofed by the celebrated Hauy have been already detailed. (See Crystallization.) Here we (hall only remark that the ftudy of the regular forms of minerals with a view to methodical arrange¬ ment was fuccefsfully profecuted by Bergman and Rome de Lille ; but has been extended and carried to the higheft degree of perfeftion by the fagacity, pro¬ found phyfical knowledge, and mathematical addrefs of the Abbe Hauy. But although the mineral fyftem ofHau*/v this diftinguilhed philofopher be founded on chara&ers the moft certain and the moft uniformly permanent, yet R 2 it (a) The Right Honourable John Forfter late Speaker of the Irifti Houfe of Commons, and the Right Honour¬ able W. B. Cunningham. T ^ 2, MINERALOGY. Hii'tory. it may be doubted whether tlie previous knowledge neceffary to undtrftand it, and in Tome cafes the diffi¬ culty of applying its principles in afcertaining fome o£ the mod effential characters, may not preclude this work from being to generally and praCtically ufeful as other fyitems. The fcientific mineralogift however will always regard it as a monument of indefatigable induf- try and patient refearch which has rarely been equalled, and wall derive from it the molt material aid in his ftudies. The fyftem of Hauy confifts of four claffes. I. The firft clafs coniifts of fubftances which are compofed of an acid united to an earth or an alkali, and fometimes to both ; and it contains three orders ; i. Earths com¬ bined with an acid \ i. Alkalies combined with an acid ; and, 3. Earths and alkalies combined with an acid. II. This clafs includes only earthy fubftances, but fbmetimes combined with an alkali. It conftitutes the liliceons genus of other fyftems. III. The third clafs comprehends combuftible fubftances which are not metals. It is divided into two orders j the firft con¬ taining Ample, and the fecond compound combuftibles. IV. The metals form the fourth clafs. It is divided in- .to ffiree orders, wffiich are characterized by different degrees of oxidation. Befides thefe claffes there are three appendices. The firft contains thofe fubftances whofe nature is not fufficiently known to have their places accurately affigned in the fyftem. The fecond appendix includes aggregates of different mineral fub¬ ftances. It is divided into three orders. The firfl: treats of primitive rocks j the fecond of fecondary and tertiary rocks 5 and the third of breccias. The third appendix is devoted to the confideration of volca¬ nic products. This is divided into fix claffes j but it is to be obferved, that the volcanic products of this mipe- ralogift comprehend, not only fuch fubftances as are Hiftory. univerfally allowed to have a volcanic origin, but alfo —v— ■-* bafalts, traps, and other minerals, the origin of which is Hill queftioned. The fyftem of Brongniart takes a wider range thaitBrongniart* other iyftems, including iubftances which are not treat¬ ed of by writers on mineralogy. It is divided into five clafles. The firft contains thofe iubftances, excluding the metals, which are combined with oxygen. T con¬ tains two orders j the firft including air and water, and the fecond the acids. The fecond clais, wffiich treats of faline bodies, is divided into two orders : the firft comprehends the alkaline tails, and the fecond the earthy falts. The third clafs, containing the ftones, is divided into three orders : the firft, hard ftones 5 the fecond magnefian ; and the third argillaceous. The fourth clais contains the combuftible fubftances, wffiich are divided into twro orders \ firft compound, and fecond, fimple combuftibles. The fifth clafs includes the me¬ tals, which are divided into two orders; firfl:, the brit¬ tle, and fecond the duflile metals. The treatife of Brongniart, notwdtli(landing fome peculiarities in the claffification which are not quite familiar to us, will be found one of the mod ufeful that has hitherto appeared, not «nly on account of the accuracy of the defcriptions, which are divefted of every kind of redundancy, but alfo on account of the interefting geological difcuffions which are introduced, as well as numerous and import¬ ant pradiical details in metallurgy and other ufeful arts. The following treat;ife will be divided into two parts. The firft part will contain the claflification and defcrip- tion of minerals j and the fecond part wdll be deftined to the analyfis of minerals and to metallurgy, or the method of extradling metals from their ores. PART I. OF THE CLASSIFICATION OF MINERALS. THE method to be followTed in this treatife is near¬ ly that of Werner, all the material parts of which we fhall freely borrow from the work of Brochant already noticed, as the bed on the fubjedl which we have had an opportunity of confulting. We (hall however oc- cafionally avail ourfelves of any ufeful information which may be derived from the mineralogy of Kiwan, Brongniart, and Hauy ; and in particular we (hall in- fert the effential charadters of the fpecies given by the latter. The univerfal charadlers employed by Werner in the defcription of minerals are feven in number; I. Colour; 2. Cohefion ; 3. Undluofity ; 4. Coldnefs; 5. Weight; 6. Smell; 7. Tafte. The table and the illuftrations which follow are chiefly taken from Weaver’s tranflation of Werner’s treatife on that fub- In the following table is exhibited the arrangement of the generic external charadlers of foffils. Common % mineralogy. Part I. Claflinoa- | tio*. Common Generic External Char offers. I. The Colour. . . . II The Cohefion of the particles, in relation to which Foflils are dillinguilned into Solid and Fluid. Solid md Friable. Charafters for the < Sight. Particular generic charac¬ ters of folid Foffils. TThe external Form. External Appearance. < The external Surface. (.The external Luftre. . . CThe internal Luftre. Appearance of the \ The Fraaure> b radlure. L The form of the Fragments. Particular generic characters of fri¬ able Foflils. The external Form. Particular generic characters of fluid foflils. The external Form. The Luftre. The appearance of the particles. Appearance of the ' ftinCt Concretions • fT he di-J ions. | T [T The Form of the diftinCt Concretions. The Surface of Separation. The Luftre of Separation. TThe Tranfparency. General appearance. 4 Fhe Streak. (.The Stain. Characters for the Touch. 'The Hardnefs. The Solidity. The Frangibility. The Flexibility. The Adhefion to the Tongue. Characters Hearing -j r The Ringing, .ers for the I The gound> \ The Creaking, mg. J (.The Ruftling. The Luftre. The Stain. The Friability. The Tranfparency. The Fluidity. Wetting of the fingers. Remaining Common Generic External Charaffers. r Characters for the <| III. The UnCtuofity. Touch. \ IV. The Coldnefs. r11 i.4 i^v (.v. Smell. Tafte. The Weight. VI. The Smell. VII. The Tafte. 133 Claflifiea- tion. ' v ’ External Characters of Minerals arranged according to their refpeaive generic charac¬ ters, and illuftrated by appropriate examples. Common Generic External Charaffers. I. THE COLOUR. The moft obvious of the external characters of mine¬ rals, is colour j it is alfo one of the moft certain charac¬ ters, and often ferves as the principal diftinguiftiing mark of many mineral fubftances. In deriving the characters of minerals from colour, three things are ocn- fidered : 1. The feveral principal colours, with their varieties. 2. The ftiade of colour. 3’ The tarniftied colours. I. Principal Colours* The feveral principal colours are not derived from the divifion of the folar ray by means of the prifm, but are fuch as are confidered Ample in common life. The principal colours are the eight following j viz. white, gray, black, blue, green, yellow, red, and brown. A. White is the firft principal colour, and it includes the following eight varieties. I. Snovo white, as fnovv white quartz, white lead ore, Carrara marble. ’ 2. Reddifb MINER. 2. Reddtfh white, as porcelain earth, reddifh white quartz. 3. Yellowijh white, as white amber, zeolite, chalk. 4. Silver white, as native lilver, native bifmuth, and arfenical pyrites. 5. Grayifh white, as feveral kinds of gypliim, quartz, and foliated granular limeftone. 6. Greenijh white, as white amianthus, talc, and cal¬ careous fpar. 7. Milk white, as calcedony, opal, and milk white quartz. 8. Tin white, as native quickfilver, native antimony, and white cobalt ore. B. Gray is the fecond principal colour, and its varie¬ ties are the following'. 1. Lead gray, as in common galena, compadt galena, gray antimonial ore, and vitreous copper ore. 2. Bluijh gray, as in bluilh gray clay, bluifh gray jtiarble, and bluilh gray limeftone. 3. Pearl gray, as in quartz, calcedony, and porcelain jafper. 4. Reddifh gray, as in granular limeftone and feld- Tpar. 5. Smoke gray, as in gray hornftone, and in dark gray flint. 6. Greenijh gray, as in cats eye, prehnite, and fome varieties of argillaceous fchiftus. 7. YellowJh gray, as in yellowilh gray calcedony, yellowifh gray tripoli. 8. Steel gray, as in fpecular iron ore, gray copper ore, ftriated gray ore of manganefe. 9. AJh gray, as in quartz, wacken, and fomfe varie¬ ties of argillaceous fchiftus. C. Black, which is the third principal colour, is di vided into the fix following varieties. 1. Grayijh black, as in bafalt, black limeftone, and black flint. 2. Brownifh black, as in black blende, tin-ftone cryftals, black cobalt ore, and bituminous ftiale. 3. Dark black, or velvet black, as in Iceland agate or obfidian, fchorl, and jet. 4. Iron black, as in micaceous iron ore, magnetic iron ftone, and fometimes in antimoniated filver ore. 5. Greenijh black, as in pitchftone, hornblende, and ferpentine. 6. Bluijh black, as in aluminous fliale, black cobalt ore, dull black lead ore. D. Blue is the fourth principal colour, including feven varieties. 1. Indigo blue, as in blue martial earth. 2. Prufiian blue, as in the fapphire and blue rock fait. Azure blue, as in lapis lazuli, and azure copper ore. 4. Violet blue, as in fluor fpar, amethyft, and in rock fait. 5. Lavender blue, as in a variety of porcelain, jafper, and lithomarga. 6. Smalt blue, as in light azure copper ore, and blue martial earth. 7. Sky blue, as in light azure copper ore, blue native vitriol, and Iky blue fluor fpar. E. Green is the fifth principal colour, of which there are the following varieties. V L O C Y. Part T. 1. Verdigreafe green, as in green copper ore, green Ckffifica- ■fluor fpar. tion. 2. Celadon green, as in the Brafilian beryl, and in pure green earth. 3. Mountain green, as in a&ynolite, hornftone, and in moft beryls. 4. Emerald green, as in fibrous malachite and fluor fpar. 5. Leek green, as in a£lynolite, jade, and prafium. 6. Apple green, as in chryfolite, prehnite, and nickel ore. 7- Grafs gre 'v, as in fome varieties of chryfoprafe and fome green lean ores. 8. Piflachio green, as in chryfolite, iron (hot green copper ore. 9. Afparagus green, as in chryfo beryl, and fome va¬ rieties of green lead ore. 1 o. Olive green, as in green lead ore, ferpentine, pitch¬ ftone and garnet. 11. Blackifh green, as in dark green ferpentine. 12. Canary green, as in green lead ore, micaceous uranitic ore, and green fteatites. F. YellovV is the fixth of the principal colours. It includes 12 varieties, which are the following. 1. Sulphur yellow, as in native fulphur and fome va¬ rieties of ferpentine. 2. Lemon yellow, as in yellow orpiment, and fomc yellow lead ores. 3. Gold yellow, as in native gold. 4. Bell metal yellow, as in iron pyrites. 5. Straw yellow, as in calamine and bifmuth ochre. 6. Wine yellow, as in Saxon topaz and yellow calca¬ reous fpar. 7. Ifabella yellow, as in calamine and fparry iron ore. 8. Ochre yellow, as in iron ochre, yellow jafper, and calamine. 9. Orange yellow, as in red orpiment and red lead ore. 10. Honey yellow, as in amber fluor fpar and calce¬ dony. 11. Wax yellow, as in yellow lead ore, common opal, and calcedony. 12. Brafs yellow, as in copper pyrites, and native g°ld- G. Red is the feventh principal colour, and it in¬ cludes the following 15 varieties. 1. Morning or aurora red, as in red lead ore, red or¬ piment. 2. Hyacinth red, as in the hyacinth, and a variety of brown blende. 3. Brick red, as in porcelain jafper. 4. Scarlet red, in light red cinnabar. 5. Copper red, as in native copper. 6. Blood red, as in Bohemian garnet, and red car- nelian. 7. Carmine red, as in red copper ore, and clear red cinnabar. 8. Cochineal red, as in cinnabar, fometimes jafper, and red quartz. 9. Critnfon red, as in ruby, oriental garnet, and red cobalt ore. 10. Columbine red, as in precious garnet, and red cobalt ore. 11. Flejh red, as in feldfpar, red gypfum, red quartz, and flefti red barytes. 12. Rofe 2* Part I. ClaffifLa- Sion. MINERALOGY. I 2. Rofe red, as in red zeolite, rofe red quartz, and ruby. Peach blojfom red, as in Aviated and earthy red cobalt ores. 14 Cherry red, as in red antimony ore and ruby. 15, Broivnijh red, as in red argillaceous iron done, and red earthy iron ftone. H. Brown is the eighth and laft of the principal colours. It is divided into the eight following varie- ties. I. Reddifh brown, as in brown tin ftone, and brown blende. 2. Cfove brown, as in rock cryftal, brown iron ore, and thumerftone. 3. Hair brown, as in wood tin ore from Cornwall. 4. Tellowifh brown, as in brown iron ochre and jafper. 5. Tombac brown, or pinchbeck brown, as in brown mica. 6. Wood brown, as in bituminous wood, a variety of afbeftus. 7. Liver brown, as in brown cobalt ore, and brown jafper. 8. Blachijh brown, as in lowland argillaceous iron ore, mineral pitch, and bituminous wood. II. Shade or Intenjity of Colour. Colours may be determined by the relation in which they ft and to each other wdth regard to intenfity or {hade. Thus among the principal colours, there are force which are light, as white and yellow 5 and fome which are dark, as blue and black and belides, the varieties of the principal colours differ from each other in refpecl to {hade. Ihus among the blue colours, indigo blue is dark, azure blue clear, and Iky blue lignt 5 and even the varieties may afiord a diverfity of thade, as, for inftance, clear canary green, light canary green. Here it ought to be remarked, that the peculiar (hade of colour in a mineral is frequently owing to its greater or lefs tranfparency, the palenefs being in proportion to the degree of tranfparency, and the dancneis to the de* gree of opacity. The degree of luftre alfo in minerals produces great variety in the (hade of colour. In difcriminating the {hade or intenfity of colour, four degrees have only in general been adopted, fhefe are the following. 1. Dark. 1. Clear. 7,. Light. 4, Pale. x. Dark, as in Bohemian garnet, which is dark blood red. 2. Clear, as in green hornftone, which is clear moun¬ tain green. 3. Light, as in red carnelian, which is light blood red. 4. Pale, as in aquamarine, which is pale mountain green. III. Tarnifhed Colours. Tarniftied colours afford peculiar chara&eriftic marks of many minerals. By tarnilhing, is meant a difference in the colour of the furface after expofure to the air from what the frelh frafture of the mineral exhibits. Some minerals are always found tarniftied in their natural polition in the earth, as in common galena, gray ore of antimony and blende: fome tarnilh on every frelh fradure being made, as in native arfenic and cop¬ per pyrites 5 while others are tarnlihed in both cafes, a in native arfenic, and purple copper ore. The colours of tarniihed minerals are divided into, 1. Simple, and 2. Variegated. 1. Simple Tarnished colours afford five varieties. a. Gray is the tarniihed colour of white cobalt ore, and fteel gray of brown hematites. b. Black is the tarniftied colour of native arfenic, brown hematites, and gray cobalt ore. c. Brown is the tarniftied colour of native filver, wdiich is white. d. Reddiflj, of native bifmuth, the frefh fracture o.f which is lilver white. e. Tellowifh, of white cobalt ore, and argentiferous arfenical pyrites. 2. Variegated tarnished colours include four varieties. a. Pavonine tarnifhed, as in copper pyrites, purple copper ore and common pyrites. b. Iridefcent tarnijhed, as in gray antimonial ore, ga¬ lena, fpecular iron ore. c. Columbine tarnifhed, as in copper pyrites. d. Steel coloured tarnijhed, as in gray cobalt ere. IV. The Play of Colour. The play of colour in a mineral can only be obferv- ed in funfhine or in a ftrong light. By this is under- ftood that property which fome minerals pofftfs of re- frading from particular fpots the different rays of light. This effed is produced by the peculiar affociation of the molecules of the mineral, and the various degrees of its tranfparency. Accidental caufes, however, pro iuce a fimilar effed, fuch as flight rifts, cracks, &c. The play of colour is remarkable in the diamona and in the opal, and fometimes in rock cryftal. V. The Mutable Reflection of Colour. This is diftinguiihed from the play of colour by the mineral exhibiting in the fame fpot a change of colour according to the pofition of its furface being varied, producing a different angle with the incident rays of light. This change takes place, 1. On the furface; 2. Internally. 1. The fuperfeial mutable refledion is finely exem¬ plified in Labrador ftone, and in a variety of marble which contains petrified {hells. 2. The internal mutable refledion of colour appears - in cat’s eye, precious opal, and moonftone. VI. The Mutation of Colour. This is diftinguiftied from the tarniftr ; in which lat¬ ter the furface only undergoes a change of colour, but in the mutation of colour, the effed penetrates the mi¬ neral, and fometimes pervades the whole. This affords two varieties. 1. The fading of colour.—By this is meant that the colour of a mineral becomes paler when it is expofed to the light, heat, or is undergoing decompofition. Ex¬ amples of thefe changes may be obferved in ftriated red cobalt ore, which expofed to the air becomes pale brownifti; blue fluor fpar becomes green ; chryfoprafe becomes light green ; pearl gray filver ore becomes ■ clear brown. 2. The per fed change of colour \% often the confe- quence of fading, when one colour is loft, .and a new 1 35 Claffifica- fO 6 M I N E-R Cla^ficn- one appears, ar. in light coloured fparry iron or - •. ear- tl°n' thy gray ore of manganefe, and argillaceous iron Hone. VII. Delineations of Colours. The delineations of colours are obferved on fimple minerals, the fame fpecimen containing feversl colours, which pafs through its interior, according to certain de¬ lineations. Of thefe delineations the following nine va¬ rieties are defcribed. 1. Dotted, when fine points of another colour are dif- perfed over the furface, as in ferpentine, and feme va¬ rieties of jafper. 2. Spotted, when the points or fpots are of the fize of a lentil to that of a fixpence, or from one-fourth to one inch in diameter. The f’pets are round and regular, or irregular. a. Regular, as in fome varieties of ferpentine, and in argillaceous fchiftus. b. Irregular, as in a variety of marble from Bayr¬ euth. 3. Nebulous or cloudy, when the fpots are large and irregular, forming with the ground colour the appear¬ ance of clouds, as in calcedony and jafper. 4. Flamy, w’hen the fpots are large, and drawn in one diredfion to a fharp point, as in ftriped jafper and fome marbles. 5. Striped, when large fpots are drawn in the fame diredtion, and run parallel through the wdiole fpecimen. There are two varieties. a. Straight or curved ftirped, as in flraight ftriped jaf¬ per. b. Broad or linear, as in linear ftriped agate, cal¬ cedony, &c. y 6. Annular, when the ftripes form concentric circles, as in jafper, carnelian, and flints. 7. Dendritic, when the delineation refembles the trunk of a tree feparating into ramifications, as in ftea- tites, fome limeftones, Egyptian marble, and calce¬ dony. 8. Ruinous, when the delineation prefents the ap¬ pearance of ruins, as in Florentine or landfcape mar¬ ble. 9. Veined, when the delineation confifts of varioufly coloured narrow ftripes, croffing each other in differ- , ent diredtions, forming fometimes the appearance of a net, as in marble, ferpentine, and jafper. II. THE COHESION OF THE PARTICLES. The cohefion of the ^particles in minerals is the fe- cond common generic charadter, which is obferved by the fight, and alfo by the touch. According to this property, minerals are divided into folid, friable, and fluid ; but thefe properties alfo belong to the particular generic charadters of minerals, to be afterwards de¬ fcribed. R articular Generic External Char aiders of Solid Mi¬ nerals. 1. The External Appearance. In the external appearance of a mineral, three things are to be obferved, the external form, the external fur- face, and the external,luftre. 1. The external form of a mineral is that figure or 1 A L O G Y. Part I. fhape ot the natural furface, which its primitive indivi- Clxffifica- duals ’are found to poffefs. The external forms of folid ti°n- minerals are diflinguifhed into common, particular, re- v "~~i gular or cryftallized, and extraneous. 1. Common External Shape. When a mineral exhibits no refemblance to any known fubftances in common lite, it is faid to be of a common form. Ot common foims there are fix kinds. A. MaJJive, when a mineral is of an indeterminate form, or amorphous, and of nearly equal dimenfions, from the fize of a haze’ nut to the greateft magnitude, and when it is incorporated with another folid mineral, it is faid to be mnfiive. Solid minerals are molt fre¬ quently found of thi* external form, and fome are never found otherwife, as infleatites, common pit-coal, galena, and copper pyrites. B. Diffeminated, or interfperfed, when a mineral, without any particular form, is in fmall pieces not ex¬ ceeding the fize of a hazel nut, incorporated with ano¬ ther folid mineral. This affords three varieties. a. Coarfely interfperfed, in fize of a hazel nut to that of a pea, as in copper pyrites. b. Finely interfperfed, from the fize of a pea to that of a grain of millet, as in tinitone, in granular quartz. c. Minutely interfperfed, from the fize of a grain of millet till it is fcarcely perceptible to the eye, as in in- terperfed native gold. C. In angular pieces, of which there are two vari¬ eties. a. Sharp-cornered, as in calcedony and in quartz. b. Blunt-cornered, as in common opal. v D. In grains. Detached minerals, from the fize of a hazel nut to that which may be diftinguifhed by the eye, are faid to be in grains. Thefe are diftinguifiied, a. According to fize, into «. In grofs grains from the fize of a hazel nut to that of a pea, as in lowland argillaceous iron ore. /3. Large grains, from the fize of a pea to that of a hemp feed, as in precious garnet, magnetic iron fand. y. Small grains, from the fize of hemp/eed to that ef millet, as in the above minerals. In minute or fine grains, fuch as are fmaller than millet feeds, as platina, native gold, tinftone. b. According to the form, which is in a.. Angular grains, as in magnetic iron fand. Rounded grains, as in platina and native gold. ' c. According as they inhere in other minerals. In this refpedt they are, *. Loofe, /3. Partially, or y. Wholly. E. In plates, diflinguilhed into a. Thick plates, as in red fiiver ore. b. Thin plates, as in vitreous filver ore. F. In membranes or flakes, when the thicknefs does not much exceed that of p^per, divided into, a. Thick, as in native filver. b. Thin, as in iron pyrites. c. Very thin, as in vitreous filver ore. 2. Earticular External Forms. The forms which come under this denomination ex¬ hibit a greater or lefs refemblance, both to natural and artificial objedds. They are called particular, be- caufe, like the former, they are not ufual or common. There Fart I. MINER Clr.ffifica- There are five kinds of particular external forms, viz. rion. elongated, rounded, flattened, impreffed, and confufed. 1' r A. Elongated. Of this there are i i varieties. ci. Dentiform, as in native filver, and dentiform vi¬ treous filver ore. b. Filiform, as in native filver, and vitreous filver ore. c. Cafeillary, refembling hairs, as in native gold and native filver. d. Reticulated, as in native filver, native copper, and a variety of galena. e. Dendritic, which is either regular or irregular, as in native filver and native copper. v f. Coral/iform, as in calcareous ftala£lites, commonly known by the name of Jlos ferri, and brown haematites. g. StalaBitiform, as in calcareous finter, brown iron ftone, and calcedony. h. Tubuliform, as in compact brown iron flone, and galena. i. Fifluliform, as in martial pyrites. h. Ft'utefcent, or arbujliform, as in black iron ftone, and compact gray ore of manganefe. /. Matrajiform, having the figure of a chemical ma- trafs, as in black hiematites, and gray ore of manganefe. E. Rounded, of which there are five varieties. a. Botryform, refembling a bunch ©f grapes, as in black cobalt ore, malachite, and copper pyrites. b. Globular, of which there are five varieties. a, PerfeBly gldbular, as in pifolite, and white cobalt ore. fl. Elliptical, as in quartz and flint, y. Amygdaloid, as in zeolite and green earth, th Spheroidal, as in Egyptian jafper and calcedony. c. ImperfeBly globular, as in carnelian and calcedony. c. Kidneyform, as in red haematites, native arfenic, and malachite. d. Bulbous or nodular, as in nodular flint and martial pyrites. e. Liquiform, as in a Angular variety of galena, from Frey berg. C. Flattened. Of the particular forms of this denomination there are three kinds. a. Specular, as in compaft galena, and compa£t red ironftone. b. In lamince or leaves, which form is peculiar to me¬ tals, as in native gold and filver. c. PeBinated, as in quartz from Schemnitz. D. Impressed. Particular forms of thefe afford fix varieties. a. Cellular, of which there are feveral kinds, as, a.. Straight cellular, which prefents two varieties. I. Hexahedral, as in quartz ; 2. Polyhedral, as in cel¬ lular quartz and calcareous fpar. Round cellular, as, i. Parallel round, as in quartz; 2. Spongiform, as aifo in quartz; 3. Indeter¬ minate, as in brown iron ftone ; 4. Double, as in quartz and hepatic pyrites; 5. Veiny, as in white co¬ balt ore. b With impreffons, which are, « Cubical, as in quartz and fluor fpar. g. Pyramidal, as in quartz, fluor fpar, and vitreous filver ore. y. Conical, as in native arfenic and quartz. Tabular or prifmatic, as in quartz, t. Globular, as in vitreous filver ore. \ OL. XIV. Part I. A L O G Y. 137 c. Perforated, as in lowland argillaceous iron ore. Chffifica- d. Corroded, as in quartz, galena, and vitreous filver . ore. e. Heteromorphous, as in native iron, fwampy iron ore, and native arfenic. f. Vejicular, as in lavas, pumice ftones, bafalt and wacken. E. Confused, of which there is only one variety. a. Ramofe, as in native iron, fometimes native copper, and vitreous filver ore. 3. Regular External Forms or Cry/lallixalions. In deferibing cryftallizations or regular forms of mi¬ nerals, four things are to be confidered ; the effential quality of the cryftals; the form, aggregation, and magnitude. A. The essential quality of crystals, which IS EITHEPv GENUINE OR SPURIOUS. ' a. Genuine or true cryjlals, which are the moft com¬ mon, as in calcareous and fluor fpars. b. Spurious or after crystals, which are diftinguifhed from true cryftals by being hollow, having a rough or drufy furface, and the folid angles or edges never fharp or wrell defined. Examples are found in quartz of the fpurious cryftals of the cube, and of the odlahedron of fluor fpar. B. Form of crystals. This is the moft confpicu- ous property of cryftals, and commonly ferves as a di- ftindtive character of thofe minerals which have regular forms. The form of cryftals is compofed of planes ; of edges formed by the junftion of twTo planes ; of deter¬ minate angles, and of folid angles formed by the union of three or more planes in one point. a. In the form of cryftals, the primary or fundamen¬ tal forms are firft to be confidered, and then the varia¬ tions or modifications of thefe forms. I. The parts of the primary form are, 1. Planes, which are either a. Lateral planes, forming the confines of the body towards its fmalleft extent ; or, b. Extreme or terminal planes, which form the confines of the body towards its greateft extent. 2. Edges, which are, a. Lateral edges, or, b. Extreme edges. 3. Solid angles, which have been defined above. II. Kinds of primary forms, which are the fevea follow'ing. * 1. 1'he Icofahedron, which is compofed of 20 equi¬ lateral triangular planes, united under equal angles, as in iron pyrites. 2. The Dodecahedron, which is compofed of twelve regular, pentangular planes, united under equal ob- tufe angles, as in iron pyrites, and white cobalt ore. 3. The Hexahedron, including the cube and the rhomb, is compofed of fix quadrilateral planes, as in calcareous fpar, fluor fpar, iron pyrites, galena, &c. 4. The Prifm, which is one of the molt common cryftallizations among minerals, is compofed of an in¬ determinate number of quadrangular lateral planes, ha¬ ving the fame direclion, and all terminating in two ex¬ treme planes, each of which has as many fides as the cryftallization poffeffes lateral planes; as in various lead ores, rock cryftal, topaz, and Ihorl. 5. The Pyramid is compofed of an indeterminate number of triangular, lateral planes, converging to a S point, * M I N E R A L O G Y. point, and of a bafe having as many fides as the cry- Part I. ftallization lias lateral pianes j as in quartz, calcareous fpar, and amethyfl. 6. The Tab/e, which is compofed of two parallel la¬ teral planes, much larger in comparifon than the other planes ; the extreme planes being indeterminate in number, fmall, and narrow 5 as in tabular cryilallized fpecular iron ore, calcareous fpar, and heavy fpar. 7. 7/h? Zew, confifts of two lateral planes only, dif¬ fering according as the lateral planes are differently curved. Of this there are two kinds: 1. The common lens, compofed of two convex lateral planes and 2. The felliform, confiding of one convex and one la¬ teral plane, fomewhat refembling a faddle. Cryftals of both kinds are obferved in fparry iron ore and calcareous fpar. III. Differences in each kind of primary forms. Thefe primary forms differ from each other accord¬ ing to fimplicity, polition, number of planes, fize of the planes, angles under wdiich they meet, direction of the planes, and fulnefs of the cryftal. 1. Simplicity. This diftin&ion is confined to the pyramid, which is either, A. Simple, as in 'light red filver ore, gray copper ore, quartz, amethyft •, and B. Double, in which thofe of the one pyramid are either. a. Set on the lateral planes of the other, and this diredtly, or ft obliquely; or b. on the lateral edges of the other. Examples of this are obferred in double py¬ ramidal vitreous filver ore, galena, rock cryftal, ruby, and diamond. 2. Pojition, which is either A. EreB, which is very common •, or B. Inverted, which has only been obferved in fimple hexahedral py¬ ramidal cryftals of calcareous fpar. 3. Number of planes, in the primary form, is in fome determinate, and in the others variable. Here are to be confidered, A. The kind of planes, as a. In the prifm and pyramid, in which the lateral planes vary ; and, b. In the table, in which the ex¬ treme planes vary. B. The number of planes, which in the prifm and pyramid ar« found, a. Trihedral, having three planes, as in the trihe¬ dral prifm of fhorl, and the trihedral pyramid of gray copper ore. b. Tetrahedral, having four planes, as in the tetra¬ hedral prifm of arfenieal pyrites, and in the double te¬ trahedral pyramid of ruby and galena. c. Hexahedral, as in the hexahedral prifm and pyra¬ mid of calcareous fpar. d. OElahedral, as in the o£lahedral prifm of topaz j and in the double oftahedral pyramid of garnet and zeolite. The table occurs, a. ^uadragonal, having four extreme planes, as in heavy fpar, yellow lead ore, and calamine. b. Hexagonal, having fix extreme planes, as in mica and heavy fpar. c. OBagonal, or with eight extreme planes, as in yellow lead ore and heavy fpar. 4. The fi%e of the planes in relation to each other, which are laid to be A. Equal, or B. Unequal j and this latter is either indeterminate, or determinate. a. Indeterminate, which is obferved in the lateral planes of the hexahedral prifm of rock cryftal. b. Determmate/y unequal, as in prifmatic white lead ore, and hexahedral priimatic calcareous fpar. In this latter the following varieties are obferved. ае. Alternately broad and narrow. /3. The two op- pofite broader •, and, y. The two oppofite narrower. 5. Angles under which the planes are affociated. Thefe are angles of the lateral edges, of the extreme edges, and of the fummit. A. Angles of the lateral edges. Thefe are, a. Equiangular, as in the icofahedral cryftals of iron pyrites. b. ReBangu/ar, as in cubical fluor fpar. с. Oblique angular, as in rhomboidal calcareous fpar. d. Unequiangular, as in the hexahedral prifm of rock cryftal, and in the oflahedral prifm of topaz. B. Angles of the extreme edges are, a. Equiangular, as in the hexagonal table of mica. b. ReBangular, as in the quadragonal table of heavy fpar. c. Oblique angular, which is either, «. Parallel, as in the tetrahedral prifm of feldfpar •, or, /3. Alternate oblique angular, as in copper pyrites. d. Unequiangular, as in the hexagonal table of preh- nite. C. Angles of the fummit, which are confined to the pyramid, and prefent the following varieties. a. Very obtufe, when the angle is from 150° to 130°, as in tourmalin. b. Obtufe, when the angle is from 130° to 110°, as in calcareous fpar. c. Rather obtufe, from no0 to 90°, as in honey ftone. d. ReBangular, as in zircon e. Rather acute, from 90° to 70°, as in quartz. f. Acute, from 70° to 50°, as in calcareous fpar. g. Very acute, from 50° to 30°, as in fapphire. 6. The direBion of the lateral planes. Thefe are ei¬ ther ftraight or curvated. A. Straight planes are even furfaces, and are the moft common. B. Curvated planes are diftinguilhed according to pofition and form. a. Poftion, which is, Inwardly curvated or con¬ cave ; or, /3. Outwardly curvated or convex 5 and, y. Inwardly and outwardly curvated, or concave and con¬ vex. The firft is obferved in fluor fpar, the fecond in diamond, and the third in fparry iron ftone. b. The form is either, «. Spherical, as in brown fpar *, Cylindrical, in which the curvature runs, 1. Parallel to the fides, as in iron pyrites, or, 2. Pa¬ rallel to the diagonal, as in fluor fpar j and, y. Conical, as in gypfum. 7. The fulnefs of the crystal. Cryftals are either full and perfeft, or hollowed at the extremity, or through¬ out. A. Full or perfeft cryftals, which is moft commonly the cafe. B. Hollowed Part I. MINERALOGY. , r^o Clafffica- B. Hollowed at tlie extremity, as in calcareous fpar, tlon’ green lead ore, &c. v" C. Hollow through the whole cryftal, as in prifma- tic beryl. /3. Modifications of the primary form. The changes or alterations which take place on the principal or fundamental form, are three j truncation, bevelling, and acumination. I. Truncation. In the truncation are to be confi- dered the parts and the determination. 1. The parts of the truncation are the planes, the edges, and the angles. 2. The determination of the truncation relates to, a. TheJituation as it occurs at the angles or edges of the primary form. b. Its magnitude, which, in relation to the planes of the primary form, is fmall or large : in the one caie the angles or edges are faid to be {lightly, in the other deeply truncated. c. The application of the truncation, which is either direct or oblique. The edges of cubical iron pyrites afford an example of oblique truncation. d. The dir eel ion of the truncation, which prefents ei¬ ther an even or a curvated furface. Cubical galena, with truncated angles •, tetrahedral prifmatic tin ftone cryftals, with truncated edges •, double tetrahedral pyramidal tin ftone cryftals, with truncated edges, are inftances of truncation. II. Bevelling, in which the parts and determina¬ tion are alfo to be confidered. 1. The parts of the bevelling are, the planes, the edges, and the angles. The bevelling edges are di- ftinguiftied into the proper bevelling edge, which is formed by the conjunction of the bevelling planes, and the bevelling edges formed by the jundfion of the bevel¬ ling planes with the lateral planes of the primary form. 2. The determination of the bevelling, in which is to be obferved. A. Its fituation as it takes place, a. At the extreme planes, which is confined to the prifm and table 3 b. At the edges, which is met with in the hexahedron, prifm, pyramid, and table 3 and, c. At the angles, wThich is a very rare occurrence. B. Its magnitude, which is faid to be flight or deep. C. The angle under which the bevelling planes con¬ join, which is faid to be, a. Acutely, b. Rectangular¬ ly, or, c. Obtufely bevelled. D. The continuation of the bevelling, which is ei¬ ther uninterrupted, or interrupted. Of the latter cafe there are two varieties, when it is once or twice inter¬ rupted. The lateral edges of double trihedral pyrami¬ dal calcareous fpar are once interruptedly bevelled 5 and the obtufe extreme edges of quadrangular tabular heavy fpar, are twice interruptedly bevelled. E. The application, a. Of ihe bevelling itfelf, wdiich is either direCt or oblique (the former is the moft com¬ mon, and the latter occurs in prifrnatic bafaltic horn¬ blende) ; and, b. Of the bevelling plaiTes, which are fet, either ©n the lateral planes, or on the lateral edges. III. The ACUMINATION, in which are alfo to be confidered the parts of the acummation and the deter- ; mination. 1. The parts of the acumination confift of, A. The acuminating planes. B. The acuminating edges: which are diltinguiftied into, a. Proper edges of acumination, formed by the “.action of the acuminat- Claffifica- ing planes 3' b. The extreme edges of acumination 3 , tlQr1, , c. The edges between the acuminating and lateral planes. C. 7'he angles of acumination. 2. The determination of the acumination relating to, K. Its fituation, as it occurs at, a. 7'he folid angles 3 or, b. At the extreme planes of the primary form. 7'he acumination of the prifm i« always at the extreme planes; of the cube ufually at the angles, and of the pyramid generally at the fummit. B. The planes thernfelves, in which are to be ob¬ ferved. a. Their number, which is either equal to, or fewrer than thofe of the primary form. In the hexahe- dral prifm of calcareous fpar and garnet, and in the tri¬ hedral prifm of tourmaline, the acumination is by three' planes 3 in the tetrahedral prifm of jargon and hyacinth, by four planes 3 in the hexahedral prifm of calcareous fpar and rock cryftal, by fix planes 3 and in tetrahedral prifmatic topaz, by eight planes. b. Their relative Jis&e, which is either equal or un¬ equal. In quartz and rock cryftal, the planes of acu¬ mination are generally indeterminately unequal 3 and in heavy fpar they are determinately equal. c. Their form, which is determinate, as in hyacinth and calcareous fpar 3 or indeterminate, as in jargon and wolfram. d. Their application, which is either on the lateral planes of the primary form, as in jargon and hyacinth, or on the lateral edges, as in calcareous fpar and garnet. C. The fummit t>f the acumination, which is, a. Ob¬ tufe, as in hexahedral prifmatic garnet; b. Redtangu- lar, as in tetrahedral prifmatic jargon 3 or, c. Acute, as in hexahedral priunatic calcareous fpar. D. 1'he magnitude of the acumination, which is faid to be, a. Slightly acuminated, as in gray copper ore and copper pyrites 3 or, b. Deeply, as in fluor fpar, with the angles acuminated by 6 planes. E. Determination of the acumination.; xvhich is ei¬ ther a point or a line. The firft is the moft common 3 and the laft is met with in prifmatic white lead ore and heavy fpar. y. Manifold modifications of the primary form. In thefe modifications cryftals are either, 1. Situated befide each other 3 or, 2. Placed the one above the other. But in deferibing a cryftallization, the number of its planes in general, and of each kind in particular, and their figure, if determinate, may be noticed, to render the defeription more accurate. As, for inftance, cubi¬ cal galena, with truncated angles, confilts of 6 octan¬ gular and 4 triangular planes. And flill further, in explaining the form of cryftal- lizations, by way of addition may be mentioned, 1. 7'he different modes of determination of which they are capable. Two different modes may in fome cafes be adopted. a. The reprefentative, by xvhich is underftood the defeription of a cryftallization according to its apparent form 3 or, b. The derivative, xvhich is founded on the confide- ration of its derivation, and its relation to the other cryftals of the fame mineral. The prifmatic cryftalli¬ zation of the tourmaline is reprefentatively an enneahe- S 2 dral 140 C'^iTlfica- tion MINERALOGY. Part T. dral prlfm, and derivative*/ a trihedral prifm, with the throe lateral fides bevelled. But, in general, the chief or effential form of a cry- ftallization is determined by, a. The largeft planes j b. The greateft regularity ; c. The molt frequent oc¬ currence of the cryftallizations; d. The affinity to the other primary forms ; e. The fuitablenefs and peculia¬ rity of its modifications •, and, f. The greateft fimplici- ty in the mode of determination. 2. The tranfitions from one primary form into an¬ other. Thefe arife, a. From the gradually increafed extent of the mo- ditying planes, and the decreafed extent of the primary planes •, or, ' b. From a change in the relative ftze of the planes j or, c. From a change in the angles under which the planes are afifociated ; or, d. From the convexity of the planes ; or, e. From the aggregation of cryftals. 3. The difficulties which are oppofed to the exaft de¬ termination of cryftals. Thefe proceed, a. From their compreffion, fome planes being uncommonly large or fmali j <•#, b. From their penetrating each other, as in tin-ftone cryftals ; or, c. From their partial conceal¬ ment, as in feldfpar, hornblende, and garnet \ or, d. From their being broken, as often happens in the crvftallization of precious ftones j or, e. From their extreme minutenefs. C. The aggregation of cryftals. According to this, eryftals are either, a. Single, in which cafe they are, a. Loofe or de¬ tached, as in precious ftones, cubical iron pyrites, &c. j Inhering or inlaying in another mineral, as feld¬ fpar in porphyry ; or, y. Adhering, as in quartz cry¬ ftals ; or, b. Aggregated, which are either regular or irregu¬ lar. «. Regular or determinate ; fuch are, 1. Twin cry¬ ftals, as in ftaurolite or crofs ftone; and, 2. Triple cryftals, as in calcareous fpar and ruby : but this is very rare. /3. Many fingly aggregated cryftals, are fuch cryftals as are, 1. Heaped upon one another, as in calcareous and fiuor fpars; 2. Adhering laterally, as in amethyft cryftals j and, 3. Implicated one in the other, as in gray antimonial ore, and in the hexahedral prifms of calcareous fpar. y. Many doubly aggregated cryftals are diftributed according to the form they affume $ fuch as the follow¬ ing, are enumerated. 1. Scopiform, when aggregated, needle-like, and ca- pilliform crvftals diverge from a common centre, as in zeolite, ftriated red cobalt ore, and capilliform py¬ rites. 2. Fafciform, which is compofed of double fcopiform, with a common centre, as in calcareous fpar, zeolite, and prehnite. 3. Acicular or columnar. Elongated, equally thick prilfns adhering laterally together, are of this deferip- tion, as in acicular heavy fpar,. and a variety of white lead ore. 4 In a rozV) like a firing of pearls, as in pyramidal cryftals of quartz. 5. Bud Jibe, in fimnle pyramids whofe bafes are con- nedted, and whole joints are direifled towards each a- other, as in bud-like drufen of quartz. ‘ 6. Globular, a cafual aggregation, confiding rooftly v J of tables or cubes, arranged in a globular form, as in odtahedral iron pyrites. 7. Annjgdaloid, when the tables are externally ac¬ cumulated, Imaller upon fmaller, as in heavy fpar. 8. Pyramidal, which takes place chiefty in prifms nearly parallel, the fummits inclining to each other ; the central prifm being the higheft, as in calcareous fpar. 9. RofeJihe, compofed of thin tables, on whofe late¬ ral planes others are affembled, and arranged in a rofe» like appearance. D. The magnitude of cryftals, wdiich is deter¬ mined, a. According to the greateft: dimenfion, as «. Of an uncommon lize, in cryftals which exceed two feet, as in quartz and rock cryftal(&. Very large, from two feet to fix inches, as in rock cryftal and calcareous fpar j y. Large, from fix to turn inches, as in iron py¬ rites, fiuor fpar, and garnet j Of a middling iize, from twro inches to half an inch, which are very com¬ mon 5 s. Small, from half an inch to one-eighth of an inch, alfo very common j Very (mall, from one-eighth of an inch to fuch as may be diftinguilhed by the na¬ ked eye, as in corneous filver ore, and very fmali tin Itone cryftals j jj. Minute, whofe form cannot be di- ftmguiffied by the naked eye, as in native gold and green lead ore. b. According to relative dimenfions, when compared with others; and this is diftinguiftied into a. Short or lowq and long or high; /3. Broad and narrow7, or lon- gated j y. Thick and thin, or {lender ; Needle-like and capilliform ; e. Spicular, and £. Globular or teffular. 4. Extraneous external forms, or petrifaefions, which are divided into petrifadlions of animals, and petrifac¬ tions of vegetables. A. Petrifaftions of animals, or zeolites, as a. Of the clafs mammalia, the parts of which com¬ monly found are the bones, the teeth, horns, and ike- letons. Such are the bones of the elephant and the rhinoceros, which are found in Siberia, and the bones of the mammoth from North America. b. Of birds, petrifactions of which are very rare. Some ikeletons of aquatic birds have been met with in limeftone near Oening. c. Of amphibious animals, fuch as thofe of the tor- toife, found in the fame vicinity as the bones of the ele¬ phant ; of frogs and toads, in the fwine ftone of Oen¬ ing $ and of an animal refembling a crocodile in alumi¬ nous (hale near Whitby in Yorkffiire. d. Of fifties, of which whole fifties, fkeletons, and im- preffions, have been found in different places. e. Of infeCts, petrifaftions of which are not very common, excepting infeCts, fuch as crabs, which have been frequently obferved. f. Of vermes, of which numerous petrifaClions are found belonging to the orders tejlacea, crujlacea, and corallina or corals. B. Petrifactions of vegetables, which are lefs nume¬ rous in the mineral kingdom than thofe of animals., Thefe are diftinguilhed into a. Petrified wood, the moft ufual of which are pe¬ trifactions of the trunk, branches, or roots of trees, and, commonly rt I. MINER ffifica- commonly cotnifting of filiceous fubftanccs, as wood- ton. ftone, jafper, horn ilont*. ■V b' Impreflions of leaves and plants, which are not uncommon in the ftrata of coal countries, particularly in the lhale, hand Hone, the argillaceous iron ftone, and the coal itfelf. II. The external surface, which is the fecond particular generic chara&er of folid minerals j and this is, 1. Uneven, having irregular elevations and depreflions, as in calcedony. 2. Granular, when the elevations are fmall, round, and nearly equal, as in ftalaftitical brown haematites. 3. Drufy, having minute, prominent, equal cry- ftals on the furface, as in iron pyrites and quartz cryllals. 4. Rough, when the elevations are minute and almoft imperceptible, as in cellular quartz. 5. Sca/y, when the furface is compofed of {lender fplinters like fcales, as in chryfolite. 6. Smooth, as in haematites and tluor fpar. 7. Streaketf, which is either fingly or doubly {freaked. A. Singly {freaked furfaces are, a. Tranfverfely, as in rock crylfals; b. Longitudinal¬ ly, as in topaz and prifmatic fhorl ; c. Diagonally, as in fpecular iron ore j and d. Alternately, as in ron pyrites. B. Doubly {freaked, which is, a. Rlumiformly, or like a feather, as in native filver and native bifmuth ; and b. Relifortnly, as in gray cobalt ore. 8. Rugofe. Of flight linear elevations, as in calce¬ dony. III. The external LUSTRE, in which are to be de¬ termined, 1. The intenfity of the luftre, which is diftinguilhed into different degrees, as A. Refplendent, which is the flrongeft kind of luftre, as in native quickftlver, galena, and rock cryftal. B. Shining, as in gray copper ore, heavy fpar, and pitch-ftone. G. Weakly finning, as in iron pyrites, fibrous gypfum, and garnet. D. Glimmering, as in earthy talc, in the fra£ture of flint, and of fteatites. E. Dull, as in moft friable minerals, as in earthy lead ore, mountain-cork, chalk, &c. 2. The kind of luftre, which is either common or metallic. A. The common luftre belongs chiefly to earthy ftones and falts. It is diftinguifhed into a. Glaffy, as in quartz and rock cryftal. b. Waxy or greafy, as in opal, and in yellow and green lead ores. c. Pearly, as in zeolite. d. Diamond, as in white lead ore and diamond. e. Scminietallic, as in mica and haematites. B. Metallic luftre, which is peculiar to metals and moft of their ores, as native gold and native filver, cop¬ per pyrites, and galena. appearance of the frafture. Here, as in the external appearance, tkree kinds of A L O G Y. characters prefent themfelves •, I. The internal luftre j II. The fraCture; III. The form of the fragment. I. The internal lujlre, the characters of which are to be determined in the fame manner as the external luftre. II. The Frallure, which is either compact or jointed. 1. The compaCt fraCture, which is diftinguiflied into fplintery, conchoidal, uneven, earthy, and hackly. A. Splintery, which is either a, Coarfe fplintery, as in quartz, prafe, and jade; or b. Fine fplintery, as in hornftone and fine fplintery limeftone. B. Even, which happens in minerals that are ufual- ly opake, and have only a glimmering lultre, as in com- paCt galena, calcedony, and yellow carnelian. C. Conchoidal, which is diftinguiihed, a. According to the fize, into large and fmall. b. According to the appearance, into perfeCt and imperfeCt; and c. According to the depth, into deep and flat. Flint, opal, jafper, and obfidian, afford examples of the conchoidal fraCture. D. Uneven, wftiich is either, a. Of a coarfe grain, as in copper pyrites. b. Of a fmall grain, as in gray copper ore, and c. Of a fine grain, as in arfenical pyrites. E. Earthy, which is the common fraCture in earths and ftones, as in marl, chalk, limeftone. F. Hackly, in which the fraCture exhibits {harp points, which is peculiar to the metals, as in native, gold and native copper. 2. The jointed fraCture. This is divided into the fibrous, ftriated, foliated, and flaty. A. The fibrous fraCture, in which are to be ob- ferved, a. The thicknefs of the fibres, as they are coarfe, fine, or delicate, as gypfum, fine fibrous malachite, and in wood-tin-ore.. b. The direction of the fibres, which are ftraight, as in red haematites, and gray antimonial ore ; or curved, as in black haematites, and fibrous rock fait. c. The pofition of the fibres, which is «. Parallel, as in rock fait and amianthus : /3. Diverging, which is, 1^ Stelliform, as in black haematites, and fibrous zeolite ; or 2. Scopiform, as in fibrous malachite : or y. Promif- cuous, as in gray antimonial ore. d. The length of the fibres, which is a. Long, as in gypfum and amianthus; or /3. Short, as in red haema¬ tites. B. Striated^ in which are to be confidered, a. The breadth of the ftriae, which are, a. Narrow, as in azure copper ore; /3. Broad, as in aCtynolite and hornblende ; or y. Very broad, as in fapphire and zeo¬ lite. b. The direction of the ftriae, w'hich is either,«. Straight, as in gray ore of manganefe ; or /3. Curved, as in zeolite and aCtynolite, c. The pofition of the ftriae, which is Parallel, as in afbeftus and hornblende ; /3. Diverging, which is dif- tinguiftied into ftelliform, as in iron pyrites and zeo¬ lite, or fcopiform, as in aCtynolite and limeftone ; or y. Promifcuous, as in gray antimonial ore and aCtynolite. d. Length of the jirice, as being <*. Long ftriated, as in afbeftus and gray antimonial ore ; or /S. Short ftriated, as in aCtynolite, ^ C. m I 41 Claffifica- tion. , / \ 142 MINER ClaffiSca- C. T/ie foliated fraclure, in which are to be deter- tkin- ; mined, a. The magnitude of the folia, as being «. Large fo¬ liated, as in mica and fpecular gypfum, /3. Scaly foli¬ ated, which is diiiinguifhed into 1. Coarfe, 2. Small, and 3. Fine fcaly foliated, as in micaceous iron ore and gypfum, y. Granularly foliated, which is diftin- guifhed into 1. Grofs, 2. Coarfe, 3. Small, and 4. Fine granularly foliated, as in fparry iron ore, blende, and calcareous fpar. b. The perfe61nefs of the folia, as being «. Perfectly foliated, as in feldfpar ; /3. Imperfeflly foliated, as in topaz ; or y. Concealed foliated, as in emerald- c. The direftion of the folia, which is a. Straight, as in large foliated blende •, or /3. Curved foliated. The latter is diftinguilhed into 1. Spherically curved, as in heavy fpar $ 2. Undularly curved, as in talc ; 3. Peta- loidally curved, as in galena ; or, 4. Indeterminately curved, as in mica and fpecular gypfum. d. The paffage or cleavage of the folia, which is, According to the angle which one paffage forms with another •, and this is either, 1. Re&angular, or 2. oblique angular j or, /S. According to the number of the cleavages, and is cither, 1. A fingle cleavage, as in mica and talc ; 2. A double cleavage, as in feldfpar and hornblende ; 3. A -triple cleavage, as in calcareous fpar and fparry iron ore ; 4. A quadruple cleavage, as in fluor fpar; 5. A fextuple cleavage, as in yellow, brown, and black blende. I). The flaty fraflure, in which are to be deter¬ mined the thicknefs and direflion of the lamellae. /j. The thicknefs of the lamellae, which is either, «. Thick, or /3. Thin flaty. b. The direction of the lamellae, as being either, «. Straight, or /3. Curved flaty ; the latter being dif- tinguiflied into, 1. Undularly, or 2. Indeterminately curved. In fome minerals which poffefs difliinfl parts, two kinds of fracture may be obferved. Thus, in fibrous gypfum, and in red and brown haematites, both the fibrous and foliated fracture appear j the fibres are then interfedied by the folia under a certain angle. In to¬ paz, the tranfverfe fradture is foliated, and the longi¬ tudinal fradture is conchoidal. III. The form of the fragments, which is either re¬ gular or irregular. 1. Regular fragments, as when they are, A. Cubical, as in galena and rock fait. B. Rhomboidal, in which cafe the fragments are a. Specular on all the planes, as in heavy fpar $ b. On four planes, as in feldfpar and hornblende j and, c. On two planes, as in fpecular gypfum. C. Trapezoidal fragments, &c. D. Trihedral pyramidal fragments are rarely to be feen diftindtly, excepting in fluor fpar. ' D. Dodecahedral fragments, as in blende. 2. Irregular fragments, as when they are, a. Cuneiform, as in wood-tin-ore, and malachite. B. Specular, as in amianthus. C. Tabular, as in mica and talc. D. Indeterminate, which are the moft common a- mong folid minerals, and are difticiguiflied into 3 A L O C Y. Part I. a. Very (harp edged, as in obfidian, common opal, Claffifica- and rock cryftal. ' b. Sharp edged, as in hornftone and quartz. ' v c. Moderately fliarp edged, as in limeftone. d. Rather blunt edged, as in lleatites; and e. Blunt edged, as in chalk and fuller’s earth. 3. The appearance of the diftinft concretions. In determining this chara&er, the form of the dif- tinft concretions, the furface of feparation, and the luftre of feparation, are to be confidcred. I. The form of the difiinft concretions, which is either granular, lamellar, columnar, or pyramidal. 1. Granular, diftin& concretions are diftinguiflhed, A. With refpedi to the form, into a. Round granular, which is either a. Spherically round, as in roe ftone and pifolite •, or /3. Lenticularly granular, as in argillaceous iron flone j or y. Elongated round granular, as in quartz : and, b. Angularly granular, which is either a. Common, as in galena and calcareous fpar ; or fi. Elongated an- nularly granular, as in hornblende and granular lime¬ ftone. B. With regard to the fize of the concretions. Thefe are, a. Grofs granular, as in zeolite and blende. b. Coarfe granular, as in mica, galena, and pifo¬ lite. c. Small granular, as in roe ftone and garnet j and d. Fine granular diftinct concretions, as in granular limeftone and galena. 2. Lamellar diftindf concretions. The differences to be obferved here are, with relpedt to the diredfion or form, and the thicknefs. A. With refpedt to the diredlion or form, they are either, a. Straight lamellar: and again either quite ftraight, as in fome galena and heavy fpar j or fortification-like, as in fome amnhyft and calcedony. b. Curved lamellar, which is either indeterminate, as in galena and fpecular iron ore; reniform, as in fibrous malachite and native arfenic j or concentric, which is either fpherical concentric, as in calcedony ai\d pifo¬ lite, or conically concentric, as in fome ftaladlites and haematites. B. With regard to the thicknefs, as being a. Very thick, the concretions exceeding one-half inch, as in amethyft and heavy fpar. b. Thick, the concretions being between one-half and one-fourth inch, as in heavy fpar and native ar¬ fenic. c. Thin, between one-fourth and one-half inch, as in calcedony. d. Very thin, from a line to a thicknefs juft percep¬ tible to the naked eye, as in fpecular iron. 3. Columnar diftindt concretions, which are diftin- guifhed with regard to the diredtion, thicknefs, form, and pofition. A. The diredtion, which is either, a. Straight columnar, as in fchorl and calcareous fpar, and, b. Curved columnar, as in argillaceous iron ftone, and fpecular iron ore. B. The thicknefs is diftinguiflied into, a. Very thick, when the diameter exceeds two in¬ ches, as in bafalt and quartz. b. Thick Part!. MINER Clafilficar b. Thick columnar, from two inches to one-fourth tlon- inch, as in amethyit and calcareous fpar. c Xhin, from one-fourth to one-half inch, as in cal¬ careous fpar and argillaceous iron fione. d* Very thin, the thicknefs being lefs than a line, as in fchorl and columnar argillaceous iron ftone. C. The form of the concretions being either a. Per^edtly columnar, as in argillaceous iron ftone. b. Imperfe&ly, as in amethyft. r. Cuneiform columnar, as in calcareous fpar and ar- fenxal pyrites. D. The pofition of the concretions, which is either a. Parallel columnar, as in fchorlite, or b. Diverging or promifcuous columnar, as in fchorl and arfenical pyrites. 4. Pyramidal diftinft concretions. This form of concretion i# very rare, and has been obferved only in the bafalt of Iceland, Faro, and Bohemia. II. The furface of reparation, which is diftinguilhed into 1. Smooth, as in wood tin ore. 2. Rough, as in native arfenic. 3. Uneven, as in galena and blende 5 and 4. Streaked, which is either, A. Longitudinally ftreaked, as in fchorl and fchorlite. B. Tranfverfely and fortification-like, as in amethyft and fpecular iron ore. III. The luftre of feparation. This charadder is to be determined in the fame manner as the external luftre. 4. The General appearance. This comprehends three particular generic charac- ■» ters, the tranfparency, the ftreak, and the ftain. I. The tranfparency, which is diftinguilhed into the following five degrees. 1. Tranfparent, which is either, A. Common, as when obje&s appear fingle through a tranfparent mineral; or, B. Doubling, when objefts appear double, as in cal¬ careous fpar, or double refracting fpar, jargon, and chryfolite. 2. Semitranfparent, as in opal and calcedony. 3. Tranflucent, as in flint, cats eye, and fluor fpar. 4. Tranflucent at the edges, as in hornftone and fo¬ liated gypfum. 5. Cpake, which is peculiar to minerals of a metallic luftre, as in malachite and jafper. II. The ftreak, which is either, 1. Of the fame colour, or, 2. Different from that of the mineral, and whofe luf¬ tre is the fame *, or, B. more or lefs different. In red filver ore the ftreak is a dark crimfon red ; in cinnabar, fcarlet red ; in green lead ore, greeniih-white j in red lead ore, clear lemon yellow. III. The ftain. With refpeft to this charaCter, mi¬ nerals are diftinguifhed into fuch as, 1. Simply ftain, and this either ftrongly or weak¬ ly, as gray ore of manganefe, and red fcaly iron ore ; and into fuch as 2. Both ftain and mark, as chalk and plumbago j and, 3. Such as do not ftain. CharaBers for the Touch. Characters of this defcription are, hardnefs, foli- L O G Y. 143 dity, frangibility, flexibility, and adhefion to the Claffifica- t0ngUe. . , . ■ y .‘—J I. The hardnefii which is determined by the follow¬ ing degrees. 1. Hard, as when a mineral gives fire with fteel, but cannot be feraped with the knife. This character is diftinguiftied into, A. Hard, when the file makes a confiderable impref- fion, as in feldfpar and fchorl. B. Very hard, on which it makes a weak impreflion, as in rock cryftal and topaz. C. Extremely hard, on which the file makes no im¬ preflion, as diamond and emery. 2. Semihard may be (lightly feraped with a knife, but gives no fire with fteel, as red copper ore, blende, limeftone. 3. Soft, eafily feraped with the knife, as in galena, mica, albeftus. 4. Very foft, which receives an impreflion from the nail, as in gypfum, chalk, talc. II. T\\efolidity, according to which folid minerals are diftinguiftied into, r. Brittle, when the particles are in the higheft de¬ gree coherent and immoveable, as in quartz, gray cop¬ per ore, and copper pyrites. 2. SeClile, when the particles are coherent but not perfeftly immoveable among one another, as in plumba¬ go and galena. 3. Malleable, when the integrant particles are cohe¬ rent and alfo more or lefs moveable among one another, as in molt of the native metals. III. The frangibility, with regard to which folid minerals are either, 1. Very difficultly frangible, as native metals, and maflive common hornblende. 2. Difficultly frangible, as in prafe, maflive quartz, and afbeftus. 3. Rather eafily frangible, as iron pyrites, vitreous copper ore. 4. Eafily frangible, as in galena, opal, and heavy (par. 5. Very eafily frangible, as in amber and pitcoal. IV. The flexibility,, according to which folid mine¬ rals are, 1. Flexible, which is diftinguiftied into, A. Common, as in malleable minerals, amianthus, gold ore. B. Elaftic, as in mica, elaftic mineral pitch from Derbyfliire. 2. Inflexible, fuch minerals as break when the direc¬ tion of the fibres is changed. V. The adhefion to the tongue, according to which - fome minerals poffefs this property 1. Strongly, as in hydrophane. 2. Rather itrongly, as in bole and lithomarga. 3. Weakly, as talc. 4. Very weakly, as in clay. 5. No adhefion at all,, as is the cafe with moft mi¬ nerals. CharaBers for the Hearing. I. The found, which is diftinguiftied into 1. Ringing or founding, as in native arfenic and com¬ mon (late. 2. Creaking, as in native amalgam when preffed with the finger. - 3- Ruffling,;, 144 Claffifica- 3. RuftHng, as in pafling the finger over mountain tion. cork anti farinaceous zeolite. v' 2. Particular geneiic charafters of friable minerals. The characters included under this title are the ex¬ ternal form, the luftre, the appearance of the particles, the (lain and the friability. I. The external form, which is either majjive, as in porcelain earth ; imerfperfcd, as in black filver ore •, as a thick or thin cmji, as in black copper ore •, fpumi- form, as in red apd brown fcaly iron ores; dendritic, as gray ore of manganefe } or reniform, as pure clay and earthy talc. II. The luftre, which is determined as in folid mine¬ rals $ but here it is diftinguifhed, 1. With regard to intenfity, as A. Glimmering, asin earthy talc and fcaly iron orej and, £. Dull, as in earthy lead ore and lithomarga. 2. With regard to the kind, as it is common or me¬ tallic. III. The appearance of the particles, w’hich is either, 1. Duffy, as in black copper ore, iron ochres. 2. Scaly, as in earthy talc. IV. The ftain is diftinguifhed in friable minerals as being either 1. Strong, as in fcaly iron ore. 2. Weak, as in earthy lead ores. V. The friability, with regard to which friable mi¬ nerals are either 1. Pulverulent, as earthy lead ores, and blue martial earth. 2. Loofely coherent, as fcaly iron ore and clays. 3. Particular generic charadters of fluid minerals. Thefe charadlers relate to the external form, the luftre, the tranfparency, the fluidity, and the wetting of the fingers. I. The external form, which is either, I. In globules j and, 2. Liquiform j both which charadters belong to native mercury. II. The luftre, which is determined as formerly ex¬ plained, and is either I. Common } or 2. Metallic, as in native mercury. III. The tranfparency, of which three degrees are diftinguifhed in fluid minerals : 1. Tranfparent, as in naphtha-, 2. Turbid, as in petroleum 5 3. Op'ake, as in na¬ tive mercury. IV. The fluidity, wTich is charadterifed by being, I. Perfedtly fluid, as mercury, and, 2. Cohefive, as in mineral tar. V. ;The wrettingof the fingers. 1. Some fluid minerals wet the fingers, as mineral tar j and, 2. Some do not, as native mercury. Remaining Common Generic External Chara&ers. The remaining common generic charadters are the undtuofity j the coldnefs j the weight $ the fmell $ and the tafte. III. The undtuofity, of which there are four degrees. 1. Meagre, as is the cafe wdth molt minerals. 2. Rather greafy, as pipe clay. 3. Greafy, as fullers earth and fteatites. 4. Very greaiy, as talc and plumbago. IV. The coldnefs, which includes three degrees. 1. Cold, having the coldnefs of quartz, as hornflone, jafper, marble. 2. Rather cold, as Terpentine, gypfutn. 2 Part T. 3. Slightly cold, as amber, pitcoal, and chalk. ClatSfica- By this character cut and polifhed {tones may be di- tlon- , ftinguifhed, where fotne of the other charadters are loft j and by it alfo natural gems may be diftinguiftied from thofe rvhich are artificial. V. The weight.—This charadter is moft accurately difeovered by taking the fpecific gravity of a mineral by means of a hydroftatic balance. See Hydrodyna¬ mics. But when this cannot be had recourfe to, a mi¬ neral is examined by lifting it in the hand and compar¬ ing its weight, thus eftimated by the feeling, with its volume, by wdrich means an approximation may be made to its fpecific gravity. Five degrees of this mode of eftimating the weight of minerals have been aflumed. 1. Supernatant, fucb minerals as fwim in wrater, as naphtha, mountain cork. 2. Light, fuch minerals as have a fpecific gravity be¬ tween 1.000 and 2.000, (taking water at l.oco) as am¬ ber, mineral pitch, and pitcoal. 3. Rather heavy, are fuch minerals as have a fpecific gravity between 2.000 and 4.000, which is the cafe with moft kinds of ftones, as amianthus, rock cryftal, niica, fluor fpar, diamond. 4. Heavy, wdien the fpecific gravity is from 4.00c to 6.000, as in moft metallic ores, fuch as gray copper ore, red haematites, white lead ore, and in fome others as heavy fpar. 5. Extremely heavy, when the fpecific gravity ex¬ ceeds 6.000, which includes the native metals, as native gold, native copper, and native filver, and fome others, as galena, tinftone cryftals, fulphurated bifmuth, and vi¬ treous filver ore. VI. The fmell is chara6feriftic of only a fmall num¬ ber of minerals. It is obferved either, 1. Of itfelf without addition, and is, A. Bituminous, as mineral pitch and naphtha. B. Slightly fulphureous, as in native fulphur and gray antimonial ore. C. Bitterifh, as in ochre kept clofe fhut up for fome time. D. Clayey, as in yellow chalk. 2. After breathing on a mineral, which fhould be cold and breathed upon ftrongly and quickly, when the fmell perceived is, A. Clayey bitter, as in hornblende and fome fie- nites. 3. After rubbing or ftriking, when the fmell emit¬ ted is, A. Urinous, as in fwineftone after rubbing. B. Sulphureous, as in pyrites. C. Garlic, as in arfenical pyrites and white cobalt ore. D. Empyreumatic, as in quartz and pitcoal. VII. The tafte, which is charadleriftic of one clafs of minerals, only, viz. the falls j and it is either, 1. Sweetifh faline, as rock fait. 2. Sweetifh aftringent, as native alum. 3. Sourifh aftringent, as native vitriol. 4. Bitter faline, as native epfom fait. 5. Cooling faline, as native nitre. 6. Lixivious, as native alkali. 7. Urinous, as native fal ammoniac. Befide the characters which we have now illuftrated, fome others are occafionally and fuccefsfully employed in the delcription of minerals. Thefe have been brought under MINERALOGY. Part 1. M I N E R Claffifica- under tdie denomination of phyQcal, chemical, and era¬ tion- pirical characters. L v i, Phtjjical. The moft common of the phyfical cha> raCters is the property which fome minerals poiTefs of exhibiting figns of electricity and liiagnetifm. Some minerals become eleCtric by being heated, and others by friction ; and the eleCtricity thus excited is in fome vitreous or pofitive, and in others refinous or negative. Some minerals, too, and particularly fome varieties of iron ore, are diftinguifhed by being attracted by the magnet. Such are magnetic pyrites, and magnetic iron fand. By filing a mineral fo fine that the particles (hall fwim on water, and then applying a magnet, the flighted: degree of magnetic eft'eCt may be obferved. Among the phyfical properties of minerals alfo, may be reckoned the phofphorefcence, which is produced by friCtion, as in fome varieties of blende ^ or by expolure to heat, as fluor fpar, and fome calcareous fpars. To thefe characters alfo belongs the peculiar property of Lemnian earth and fome other boles, which being thrown into water fplit into pieces with a crackling noife ; and the property of fome opals and other ftones, of acquiring a higher degree of tranfparency when they are immerfed in water, hence called hydrophanes. 2. Chemical characters.—By fome fimple experi¬ ments, the nature of many mineral fubftances may be eafily and quickly afeertained, and particularly by means of acids. Thus, the nitrous acid is employed to difeover whether a mineral effervefees, from which cha¬ racter the nature of the mineral can be more certainly known than by any other. Ammonia, or the volatile alkali, diffolves copper, and affumes a blue colour. A- cetic acid is fuccefsfully employed as a teft of lead, which communicates to the acid a fweetifh tafte. By means of heat, and particularly by the ufe of the blow¬ pipe, much knowledge may be obtained of the nature of minerals. Some are volatilized •, in others the co¬ lour is changed ; and while fome are nearly fufed at different temperatures, others burn with a flame of pe¬ culiar colours. 3. Empirical characters.-**-Among thefe characters, the molt common is the peculiar efflorefcence which takes place in fome ores. In copper ores the effloref¬ cence is green or blue; in iron ores, brown, yel¬ low, or red ; in cobalt, peach bloffom red j and in ar- fenic, white. Characters for the diftinCtion of minerals may be ob¬ tained from the circumftance of certain minerals being found generally accompanying others j as native arfenic with orpiment j gray copper ore with copper pyrites, A L O G y. and gray filver ore ; red copper ore with native cop¬ per : white cobalt ore is rarely found without nickel ; and by attending to this circumftance, it will not be miftaken for arfenical pyrites. for the lake of brevity, Mr Kirwan, and others after him, have adopted a method of expreffing fome of the characters by means of numbers. The following table exhibits fome of thefe characters and correfponding numbers. Refplendent, denoted by the number 4. Shining 3. Weakly fhining _ 2. Glimmering j. Dull . o. Fragments, when the form is indeterminate. Very fharp-edged 4 Sharp-edged 3 Rather lharp-edged 2 Rather blunt 1 Perfectly blunt o Tranfparency. Tranfparent 4 Semitranfparent 3 Tranflucent 2 Tranflucent at the edges 1 Opake o Hardnefs. Of chalk, denoted by 3 Yielding to the nail 4 May be feraped with a knife j Yields more difficultly to the knife 6 Scarcely yields to the knife 7 Does not give fire wTith fteel 8 Gives feeble fparks with iteel 9 Gives lively fparks 10 But it is obvious that this abridged mode of expref¬ fing thefe characters, by means of numbers, can only be advan ageoufly employed by thofe who have made themfelves quite familiar with the different numbers correfponding to the different (hades of charaCter, and who can thus recolleCt them with facility and precifion. lo others this method of d leription, by requiring con- ftant reference to the explanation, may prove rather em- barrafling, fo that what is gained in brevity may be loft in perfpicuity. We propofe therefore, ftill to retain the ver¬ bal mode of expreflion in preference to the numerical. Tabi e of Minerals arranged in the order of their Genera and Species, each Genus being divided into Families or Groupes, the chara&ers of which latter are derived from their ex¬ ternal properties according to the method of Werner. First Class. EARTHS & STONES. I. Diamond Genus. Diamond. II. Zircon Genus. Zhcon. Hyacinth. ^ ol. XIV. Part I. III. Siliceous Genus. Chrysolite Family. Chryfoberyl. Ckryfoiite. Olivine. Coccolite. Augite. Vefuvian. Garnet Family. Leucite. Melanite. Garnet. a. Precious. b. Common. c. Bohemian or Pyrope. Grenatite or Staurolite, T Ruby Family. Ceylanite. Spindle. Sapphire. Corundum. Adamantine fpar. Emery. Schorl J4-6 Claffiffca- . Schorl Family. . Topaz. v Pyrophyfalite. Euclafe. Emerald. Beryl. Schorlite. Schorl. a. Common. b. Electric or Tourma¬ line. Piflazite. Zoilite. Axinite or Thumerftone. Quart% Family. Quartz. a. Amethyft. Common. Fibrous. b. Rock cryftal. c. Rofe-coloured or milk quartz. d. Common quartz. e. Prafe. f. Ferruginous quartz, or iron flint. Hornftone. a. Splintery. b. Conchoidal. c. Ligniform. Flinty flate. a. Common. b. Lydian Hone. Flint. Calcedony. a. Common. b. Carnelian. Opal. a. Precious. b. Common. d. Ligniform. Menilite. Jafper. a. Egyptian, b. Ribband- c. Porcelain. d. Common. e. Agate. /. Opal. Heliotrope or Rloodftone. Chryfoprafe. Plafma. Cats eye. Pitchjlone Family. Obfldian. Pitchifone. Pearlftone. Pumice. Zeolite Family. Prehnite. a. Fibrous. b. Foliated. Zeolite. t. Fibrous }Mcfotypev MINERALOGY. Part I. a!. Common. Claffifica* b'. Calcareous llnter. t‘on- d. Pifolite or pea-ftone. l—■—v— Calcareous tufa. Foam earth. Slaty fpar. Arragonite. Brown fpar. Dolomite. Rhomb or bitter fpar. Swineftone. Marl. a. Earthy. b. Indurated. Bituminous marl flate. Family of Phofphates. Apatite. • Afparagus ftone. Phofphorite. Family of Fluates. Fluor. a. Earthy. b. Compact. c. Fluor fpar. Family of Sulphates, Gypfum. a. Earthy. b. Compadh r. Foliated. d. Fibrous. Selenite. Anhydrite. Cube fpar. VII. Barytic Genus, Family of Carbonates. Wither! te. Family of Sulphates, Heavy fpar. a. Earthy. b. Compact. c. Granular. d. Foliated. e. Common. f. Columnar. g. Fibrous. h. Bolognian. VIII. Strontian Genus. Family of Carbonates. . Strontites. Family of Sulphates. Celeftine. a. Fibrous. b. Foliated. Cubizite, Chabafie or A- nalcime. Crofs-ftone, Staurolite. Laumonite. Dipyre. Natrolite. Azurite. Lazulite. Hydrargillite. Fcldfpar Family. Andaluflte. Feldfpar. a. Adularia. b. Labradore ftone. c. Common feldfpar. d. Compaft. e. Hollow fpar, chiafto- lite. Scapolite. Ardlizite or Wernerite. Diafpore. Spodumene. Meionite. Sommite. Ichthyophthalmite. IV.ARGiLi.ACEOusGenus. Clay Family. Native alumina. Porcelain earth. Common clay. a. Loam. b. Pipe clay. „ c. Potters clay. d. Variegated clay. e. Slaty clay. Clayftone. Adhefive flate. Poliftiing flate. Tripoli. Floatftone. Alum ftone. Clay Slate Family. Aluminous fchiftus. a. Common. b. Shining. Bituminous fchiftus. Drawing flate. Whet flate. Clay flate. Mica Family. Lepidolite. Mica. Finite. Potftone. Chlorite. a. Earthy. b. CJommon. c. Foliated. d. Schiftofe.’ Trap Family. Hornblende. a. Common. b. Bafaltic. c. Labradore. d. Schiflofe. Bafalt. Wacken. Phonolite or Clinkftone. Lava. Lithomarga Family. Green earth. Lithomarga. a. Friable. b. Indurated. Rock foap. Umber. Yellow earth. kV. Magnesian Genus. Soap Stone Family. Native magnefla. Bole. Sea froth. Fullers earth. Steatites. Figure ftone. Talc Family. Nephrite. a. Common. b. Axe-ftone. Serpentine. a. Common. b. Precious. Schillerftone. Talc. a. Earthy. b. Common. c. Indurated. Afbeftus. a. Mountain cork. b. Anrianthus. c. Common afbeftus. d. Ligniform afbeftus. ABynolite Family. Cyanite. Aclynolite. a. Afbeftous. b. Common. c. Glafly. Tremolite. a. Afbeftous. b. Common; c. GlaiTy. Smaragdite. Sahlite. Sc halftone. VI. Calcareous Genus. - Family of Carbonates. Agaric mineral. Chalk. Limeftone. a. Compa£L a'. Common. b'. Oolite or roe-ftone. b. Foliated. a!. Granular. b'. Calcareous fpar. c. Fibrous. Second Class. SALTS. I. Genus Sulphates. Native vitriol. Native alum. Mountain butter. Capillary fait. Native Epfom fait. Native Glauber fait. DL Part I. Ciaffifica- II. Genus NITRATES. , u°r1. Native nitre. ' ' III. Genus Muriates. Rock fait. a. Foliated. b. Fibrous. Sea fait. Native fal ammoniac. IV. Genus CARBONATES. Native foda. Native raagnefia. V. Genus Borates. Boracite. VI. Genus Fluates. Cryolite. Third Class. COMBUSTIBLES. I. Genus Sulphur. Native fulphur. a. Common. b. Volcanic. II. Bituminous Genus. Petroleum, or mineral oil. Mineral pitch. a. Elaftic. b. Earthy. c. Slaggy. Amber. a. ’A7hite. b. Yellow. Broon coal. a. Common. b. Bituminous wood. c. Earth coal. d. Alum earth. e. Moor coal. Black coal. a. Pitch coal. b. Columnar coal. c. Slaty coal. d. Cannel coal. e. Foliated coal. f. Coarfe coal. Coal blende. a. ConchoidaL b. Slaty. III. Graphite Genus. Graphite. a. Scaly. b. Compaft. Mineral charcoal. Fourth Class. METALLIC ORES. I. PLATINA Genus. Native platina. II. Gold Genus. Native gold. a. Golden yellow. b. Brafs yellow. c. Grayilh yellow. III. Mercury Genus. Native mercury. Native amalgam. Corneous ore of mercury. MINERALOGY. Liver ore of mercury. a. Compadl. b. Slaty. Cinnabar. a. Common. b. Fibrous. IV. Silver Genus. Native filver. a. Common. b. Auriferous. Antimonial filver ore. Arfenical filver ore. Corneous filver ore. Sooty filver ore. Vitreous filver ore. Brittle vitreous filver ore. Red filver ore. a. Dark red. b. Bright red. White filver ore. Black filver ore. V. Copper Genus. Native copper. Vitreous copper ore. a. Compaft. b. Foliated. Variegated copper ore. Copper pyrites. White copper ore. Gray copper ore. Black copper ore. Red copper ore. a. Compafl. b. Foliated. c. Capillary. Brick-red copper ore. a. Earthy. b. Indurated. Emerald copper ore. Azure copper ore. a. Earthy. b. Indurated. Malachite. a. Fibrous. b. Compact. Green copper ore. Ferruginous green copper ore. a. Earthy. b. Slaggy. Micaceous copper ore. a. Foliated. b. Lenticular. Muriate of copper. VI. Iron Genus. Native iron. Iron pyrites. a. Common* b. Radiated. c. Capillary. d. Hepatic. Magnetic pyrites. Magnetic iron ore. a. Common. b. Arenaceous. Specular iron ore. a. Common. a'. Compact. b'. Foliated. b. Micaceous iron ore. Red iron ore. a. Red iron froth. b. Compact. c. Red haematites. d. Red ochre. Brown iron ore. a. Brown iron froth. b* Compaft. c. Brown haematites. d. Brown ochre. Sparry iron ore. Black iron ore. a. Compadh b. Black haematites. Argillaceous iron ftone. a. Red chalk. b. Columnar argillace¬ ous iron ftone. c. Granular. d. Common. e. Reniform. f. Filiform. Bog iron ftone. a. Mora fly. b. Swampy. c. Meadow. Blue earthy iron ftone. Green earthy iron ftone. VII. Lead Genus. Galena. a. Common. b. Com pa ft. Blue lead ore. Brown lead ore. Black lead ore. White lead ore. Green lead ore. Red lead ore. Yellow lead ore. Native fulphate of lead. Earthy lead ore. a. Friable. b. Indurated. VIII. Tin Genus. Tin pyrites. Common tinftone. Grained tin ore. IX. Bismuth Genus. Native bifmuth. Vitreous bifmuth. Ochre of bifmuth. X. Zinc Genus, Blende. a. Yellow. b. Brown* c. Black. Calamine. tf. Compadh b. Foliated. XI. Antimony. Native antimony. Gray ore of antimony. T i a. CompadL b. Foliated. c. Radiated. d. Plumofe. Red ore of antimony. White ore of antimony. Ochre of antimony. XII. Cobalt Genus. White cobalt ore. Gray cobalt ore. Shining cobalt ore. Black cobalt ochre. a. Friable. b. Indurated. Brown cobalt ochre. Yellow cobalt ochre. Red cobalt ochre. a. Earthy. b. Radiated. XIII. Nickel Genus. Copper coloured nickel. Nickel ochre. XIV. Manganese Genus. Gray ore of raanganefe. a. Radiated. b. Foliated. c. Compact. d. Earthy. Black ore of manganefe. Red ore of manganefe. XV. Molybdena Genus4 Sulphuret of molybdena. XVI. Arsenic Genus. Native arfenic. Arfenical pyrites. a. Common. b. Argentiferous. Orpiment. a. Yellow. b. Red. Native oxide of arfenic. XVIL Tungsten Genus. Wolfram. Tungftate of lime. XVIII. Titanium Genus. Menachanite. Odtahedrite. Titanite. Nigrine. Brown ore. Iferine. XIX. Uranium Genus. Pitchy ore. Micaceous uranite.. Uranite ochre. XX. Tellurium Genus. Native tellurium. Graphic ore. Yellow ore. Black or foliated ore. XXL Chromium Genus, Needle ore. Ochre ©f chromium. XXII.CoLUMBiUMGenus. XXIII. TANTALiuMGen. XXIV. Cerium Genus. I. Genus. MINER I. Genus. DIAMOND. One Species. Diamond. Id. Kirwan, I. 393. Le Diamant, Brochant, II. 153. Haiiy, III. 287. EJJential charaBer.—Scratches all other minerals. External charaBers.—Its molt common colours are grayilh white and yellowHh white; fmoke gray and yellowiiti gray ; clove brown ; fometimes afparagus green, palling1 to piltachio green and apple green ; fometimes a wine yellow and citron yellow, and aifo blue and rofe red. When the diamond is cut, it prefents a fplendid and varied play of colours, which is one of its molt ftriking charadters. . It is found fometimes in rounded grains, which are fuppofed to have been cryftals with the edges worn ; but it is molt frequently met with cryitallized. The primitive form is a regular oftahedron, the in- tegrant molecule a regular tetrahedron ; but the form which it commonly alfumes is the fpheroidal, with 48 curvilineal faces, fix of which correfpond to the fame face of the primitive odahedron. Befides this form there are various others, as the double three-fided py¬ ramid, the dodecahedron, &c. All the modifications of the cry Hals of the diamond, Hatiy obferves, feem to be the effeds of its tendency to cryftallize in a regular figure of 48 plane faces, which, if it ever has exifted, has not yet been difcovered ; and it is eafy to conceive that this form would be produced by intermediate decre¬ ments on all the angles of the nucleus; but the devia¬ tions from this form feem to have been occafioned by its precipitate formation. The external luftre is from four to one ; internal four. The fradure is ftraight foliated, with a fourfold cleavage, parallel to the faces of theodahedrou ; tranf- parency four to three ; hardnefs ten ; brittle ; fpecific gravity 3.518 to 3.600. Becomes pofitively eledric by fridion, even before it is polifhed. Chemical charaBer.—When expofed to a fufficient temperature, it is entirely confumed. This has been fully afcertained by the experiments of modern che- mifts, from which it is concluded, that the diamond is entirely compofed of pure carbone. See Chemistry. Mr Boyle was the firft, according to Henckel, who fubjeded the diamond to the adion of heat, and in his experiments he found that it exhaled very copious and acrid vapours, d his was about the- year 16735 hut in the year 1694 the experiment was repeated by the order of Cofmo III. grand duke of Tufcany. Diamonds were expofed to the heat of the powerful burning glafs of Tfchirnhaufen, the adion of which was even aided by means of another burning glafs ; and about the end of 30 feconds a diamond of 20 grains loft its tranf- parency, feparated into fmall pieces, and was at laft entirely diflipated. The fame experiment was repeated on other diamonds, always with the fame refult, and without exhibiting the lead fign of fufion. Newton, in his treatife on Optics, has placed the diamond among combuftibles, fuppofing that it is a coagulated undu- ous fubftance. He had been led to this by obferving its extraordinary refradive power, which in combufti- ble bodies he found to be in a ratio confiderably higher A L O G Y. Part L than their denfity. According to this general lawT he concluded, that the diamond as well as rater contained an indam '.able principle, both of which have fince been verified. Newton’s treatife w’as not publifhed till 1704; but it appears that part of it was com¬ pofed and read to the Royal Society in the year 1675, nearly 20 years before the Florentine experiments w'ere made. But nearly 70 years before this latter period, Boetius de Boodt, in his Hiftory of Stones, appears to have been perfedly fatisiied, from an experiment which he deferibes, that the diamond was of an inflammable na¬ ture. This document, which vre prefume will gratify the curiofity of many of our readers, is too Angular to be omitted. “ Maltix deinde calefieri parum, quemad- modum et adamas debet, idque, ut impofitus ac fupra pofitus maftici ftatim ill! unione vera uniatur, ac vivos undique radios a fe jaceat. Hane unionem refpuunt alise omnes gemmae diaphanse—cur vero legitimus ada¬ mas folus tinfturam illam recipiat, aliae gemmae non, difficile eft feire. Exiflimo mutuum ilium et amicum amplexum propter Jimilitudinem aliquam quam habent in materia et qualitatibus ; hoc eft, tota utriuique na- tura fieri, quod itaque maftix qua ignece naturce eji ada- manti facile jungi poffit, fignum eft ; id propter ma- teriae fimilitudinem fieri, ac adamantis matenam igneam, et fulphuream ejje, atque ipfius humidum intrinlicum et primogenium cujus beneficio coagulatus eft; plane fuijfe oleofum et igneum, aliarum vero gemmarum aqueum.— Non mirum itaque fi pinguis, oleofa, et ignea mafticis fubftantia illi abfque vifu.s termino adpingi et applicari, aliis vero gemmis non poflit.” Boetius de Boodt, Gem* et Lapid. Hijl. Hanoviae, 1609. 4to, lib. ii. cap. 1. For the fake of the Englifh reader we ftiall tranflate this curious document. “ If maftich and the diamond be expofed to heat, and brought into contaft, they enter into perfedl union, and emit a very lively flame* which does not take place in any other gem. But w’hat is the reafon that the diamond alone poffeffes this pro¬ perty ? I am of opinion that this mutual combination arifes from a certain refemblance which each of the fubftances poffeffes in its nature and properties : on this account, therefore, the maftich, which is of a combufti- ble nature, may be united to the diamond from a fimi- larity in their nature, which (hows that the diamond is compofed of combuJHble and fulphureous matter; and that the humid and original particles of its compofition, by means of which it was coagulated, or affumed a fo- lid form, have been decidedly of an oily and inflamma¬ ble nature, while thofe of other gems have been of an aqueous nature. It is not, therefore, furprifing that the fat, oily, and combuftible fubftance of maftich may enter into intimate union with the diamond, but cannot be combined with other gems.” Localities, &c.—The diamond is found in various places of the Eaft Indies, as in the provinces of Gol- conda and Viiapour, in the peninfula of Hither India ; and in the kingdoms of Pegu and Siam, in the penin¬ fula of Farther India, and nearly, it is obferved, in the fame degree of latitude. In 1728 the diamond was difcovered in Brafil, in the diftrift of Setro-do-Frio, w'hich is fituated in the fame. fouthern latitude as the countries which produce the diamond on the north fide of the equator. The native repofitory of the diamond, fo far as is known, is a ferruginous foil, but whether it be / Part I. MINER CUTfi a- be produced on the fpot where it is difcovered, or have' tlQn- been tranfported from the place of its origin, has not v been afcertained. It is found alfo in veins filled with foil of a fimilar nature. We ftiall here add a fhort hiftpry of the diamond mines. Biamond The diamond mines are found only in the kingdoms mines Qf Golconda, Vifapour, Bengal, the ifland of Borneo, and Brafil. There are four or five mines, or rather three mines and two rivers, whence diamonds are obtained. The mines are, I. That of Raolconda, in the province of Car- natica, five days journey from Golconda, and eight from VHapour. It has been difcovered about 200 years. 2. That of G'ani, or Coulour, feven days journey from Golconda call ward. It was difcovered 150 years ago by a peafant, who digging in the ground found a na¬ tural fragment of 25 carats. 3. That of Soumelpour, a large towm in the kingdom of Bengal, near the Dia¬ mond-mine. This is the moft ancient of ail : it fliould rather be called that of Goual, which is the name of,the river, in the fand whereof thefe ftones are found. 4. The fourth mine, or rather the fecond river, is that of Succudan, in the ifiand of Borneo ; and 5. That; of Serro do-Frio in Brafil. Diamond-mine of Raolconda.—In the neighbour¬ hood of this mine the earth is landy, and full of rocks and copfe-wood. In thefe rocks are found feveral lit¬ tle veins of half and fometimes a whole inch broad, out of which the miners, with a kind of hooked irons, draw the fand or earth wherein the diamonds are j breaking the rocks when the vein terminates, that the track may be found again, and continued. When a fufficient quantity of earth or fand is drawn forth, they wafh it twm or three times, to feparate the ftones. The miners work quite naked, except a thin linen cloth before them j and befides ■ this precaution, have like-; wife infpeftors, to prevent their concealing diamonds, which, however, they frequently find means to do, by watching opportunities when they are not obferyed, and fw'allOwing them. Diamond-mine of Gani or Coulour.—In this mine are found a great number of diamonds from 10 to 40 ca¬ rats, and even-more. It was here that the famous dia¬ mond of the Great Mogul, which before it was cut weighed 793 carats, was found. The diamonds of this mine are not.very clear : their w'ater is ufually tinged with the quality of the foil; being black where that is marlhy, red where it partakes of red, fometimes green and yellow, if the ground .happen to be of thofe co¬ lours. Another defeft of fome confequence is a kind of greafinefs appearing on the diamond, when cut, which takes off part of its luftre.—There are ufually no lefs than 60,000 perfons employed in this mine. When the miners have found a place where they in¬ tend to dig, they level another fomewhat bigger in the neighbourhood thereof, and inclofe it with walls about two feet high, only leaving apertures from fpace to fpace, to give paffage to the water. After a few fu- perftitious ceremonies, and a kind of feaft which the mafier of the mine makes for the workmen, to encou¬ rage them, every one goes to liis fc%finefs, the men d’gg'ng the earth in the place firft difcovered, and the women and children carrying it off into the other walled round. They dig a few feet deep, and till fuch time as they find water. Then they ceafe dig¬ ging j and the water thus found ferves to wafh the A L O G Y. 149 earth two or three times, after which it is let out at Diamond an aperture referved for that end. This earth being , feet-us- well waihed, and well dried, they fift it in a kind of v open fieve, and laftly, fearch it well with the hands to find the diamonds. This mine is in a plain of about one league and a half in extent, bounded on one fide by a river, and on the other by a range of lofty moun¬ tains, which form a femicircle. It is faid that the near¬ er the digging is carried to the mountains, the diamonds are the larger. Diamond-mine of Soumelpour, or river Goual.— Soumelpour is a confiderable town near the river Goual, which runs into the Ganges. It is from this river that all our fine diamond points, or fparks, called natural /parks, are brought. They never begin to feek for diamonds in this river till after the great rains are over, that is, after the month of December j and they ufually even wait till the water is grown clear, which is not be¬ fore January. The feafon at hand, eight or ten thou- fand perfons, of all ages and fexes, cpme out of Soumel¬ pour and the neighbouring villages. The moft expe¬ rienced among them fearch and examine the fand of the river, and particularly where it is mixed with py¬ rites, going from Soumelpour to the very mountain W'hence it fprings. When all the fand of the river, which at that time is very low, has been well examin¬ ed, they proceed to take up that wherein they judge diamonds likely to be found j which is done after the following manner: They dam the place round with ftones, earth, and fafcines, and throwing out the water, dig about two feet deep : the fand thus got is carried into a place walled round on the bank of the river. The reft is performed after the fame manner as at other mines. Diamond mine in the illand of Borneo, or river of Succudan.—We are but little acquainted with this mine ; ftrangers being prohibited from having accefs to it: though very fine diamonds have been brought to Ba¬ tavia by ftealth. They were formerly imagined to be fofter than thofe of the other mines j but experience fnows they are in no refpeft inferior. Diamond mine of Serro-do-Frio.—A defcription of this mine was given by D’Andrada in 1792, to the Na¬ tural Hiftory Society of Paris. The 'mine is fituated to the north of Villa Rica, in the 18th degree of fouth latitude. The wdiole country in which the diamonds are found abounds with ores of iron j and the ftratum of foil, immediately under the vegetable foil, contains diamonds diffeminated in it, and attached to a gaugue or matrix wrhich is more or lefs ferruginous 5 but they are never found in veins. When this mine was firft difcovered, the fearching for diamonds was fo fuccefsful, that the Portuguefe fleet which arrived from Rio’de Janeiro in 1730 brought no lefs than 1146 ounces of diamonds. This unufual quantity introduced into -the market immediately re¬ duced the price; and to prevent this circumftance re¬ curring, the Portuguefe government determined to limit the number of men employed in the mines. jg As the diamond is the hardeft of all fubftances, it Method of can only be cut and poliftied by itfelf. To bring itcutt‘ng to that perfe&ion which augments its price fo confi-^^^ derably, the lapidaries begin by rubbing feveral againft n^,^' each other, while rough ; after having firft glued them to the ends of two wooden blocks, thick enough t© be held . *5° MINERALOGY. Part I. Diamond Of eftima- ting. IS Celebrated diamonds. held in the hand. It is this powder thus rubbed off the ftones, and received in a little box for the purpofe, that ferves to grind and polilh them. Diamonds are cut and polilhed by means of a mill, which turns a wheel of foft iron fprinkled over with diamond-duft mixed with oil of olives. The fame dull, wrell ground, and diluted with water and vine¬ gar, is ufed in the fawing of diamonds 5 which is performed with an iron or brafs wire, as fine as a hair. Sometimes, in lieu of fawing the diamonds, they cleave them, efpecially if there be any large Ihivers in them. The method of cutting and polifhing the diamond was not dilcovered till the 15th century. The dia¬ monds which were employed as ornaments before that period, were in their rough and natural Hate. The invention is afcribed to Louis Berguen, a native of Bruges, who in the year 1476, cut the fine diamond of Charles the Bald, duke of Burgundy, which he loft the fame year at the battle of Morat. This diamond was then fold for a crown, but afterwards came into the poffeffion of the duke of Florence. The JirJi water in diamonds means the greateft pu¬ rity and perfeftion of their complexion, which ought to be that of the pureft water. When diamonds fall fhort of this perfedtion, they are faid to be of the fe- cond or third water, &c. till the ftone may be proper¬ ly called a coloured one. The value of diamonds is eftimated by Mr Jefferies by the following rule. He firft fupppfes the value of a rough diamond to be fettled at 2I. per carat, at a a medium; then to find the value of diamonds of greater weights, multiply the fquare of their weight by 2, and the produdt is the value required. JL. g. to find the value of a rough diamond of two carats : 2 X 2~4, the fquare of the weight $ which, multiplied by two, gives 81. the true value of a rough diamond of two carats. For finding the value of manufadlured diamonds, he fuppofes half their weight to be loft in manufadhiring them ; and therefore, to find their value, we muft multiply the fquare of double their weight by 2, which will give their true value in pounds. Thus, to find the value of a wrought diamond weighing two carats; we firft find the fquare of double the weight, viz. 4X4 = 16 ; then 16x2=32. So that the true value of a wrought diamond of two carats is 32I. On thefe principles Mr Jefferies has conftrufted tables of the price of diamonds from 1 to 100 carats. The greateft diamond ever known in the world is one belonging to the king of Portugal, which was found in Brafil. It is ftill uncut: and Mr Magellan informs us, that it was of a larger fize } but a piece was cleaved or broken off by the ignorant countryman, who chanced to find this great gem, and tried its hard- nefs by the ftroke of a large hammer upon the anvil. This prodigious diamond weighs 1680 carats: and although it is uncut, Mr Rome de 1’Ifle fays, that it is valued at 224 millions fterling ; which gives the efti- mation of 79,36 or about 80 pounds fterling for each xarat: viz. for the multiplicand of the fquare of its whole weight. But even in cafe of any error of the prefs in this valuation, if we employ the general rale above mentioned, this great gem muft be worth at leaft 5,644,800 pounds fterling, which are the produft of z68o by two pounds, viz. much above five millions and a half fterling. But this gem is fuppofed by feme Clalfifica- to be a white topaz. , tlon- . The famous diamond which adorns the feeptre of v the emprefs of Ruffia under the eagle at the top of it weighs 779 carats, and is worth at leaft 4,854,728 pounds fterling, although it hardly coft 135,417 gui¬ neas. This diamond was one of the eyes of a Mala- barian idol, named Scharingham. A French grenadier, who had deferred from the Indian fervice, contrived fo well as to become one of the priefts of that idol, from which he had the opportunity to fteal its eye : he run away to the Englilh at Trichinopoly, and thence to Madras. A {hip-captain bought it for twenty thoufand rupees: afterwards a Jew gave feventeen or eighteen thoufand pounds fterling for it : at laft a Greek merchant named Gregory Sujfras, offered it to fale at Amfterdam in the year 1766 : and Prince Or- loff made this acquifition for his fovereign the emprefs of Ruffia. This diamond is of a flattened oval form and of the fize of a pigeon’s egg. The diamond of the great Mogul is cut in rofe ; weighs 279x3- carats, and it is worth 380,000 guineas. This diamond has a fmall flaw underneath near the bottom : and Tavernier, page 389, who examined it, valued the carat at 150 French livres. Before this diamond was cut, it -weighed 793-f carats, according to Rome de 1’Ifle : but Tavernier, page 339, of his fe- cond volume, fays, that it weighed 900 carats before it was cut. If this be the very fame diamond, its lofs by being cut was very extraordinary. Another diamond of the king of Portugal, which weighs 215 carats, is extremely fine, and is worth at leaft 369,800 guineas. The diamond of the grand duke of Tufcany, now of the emperor of Germany, weighs 1394 carats j and is worth at leaft 109,520 guineas. Tavernier fays, that this diamond has a little hue of a citron colour j and he valued it at 135 livres tournoifes the carat. Robert de Berquen fays, that this diamond was cut into two: that the grand Turk had another of the fame fize: and that there were at Bifnagar two large diamonds, one of 250 and another of 140 carats. The diamond of the late king of France, called the Pitt or Regent, weighs 1364 carats : this gem is worth at leaft 208,333 guineas, although it did not coft above the half of this fum. Patrin fays, that it is believed to be at Berlin, (I. 226.) and we may add, that it has pro¬ bably been carried back to France among other fpoils. The other diamond of the fame monarch, call¬ ed the Sancy, weighs 55 carats; it coft 25,000 gui¬ neas : and Mr Dutens fays, that it is worth much above that price. Brilliant Diamond, is that cut in faces both at top and bottom *, and whofe table, or principal face at top, is flat. To make a complete fquare brilliant, if the rough diamond be not found of a fquare figure, it muft be made fo ; and if the work is perfe£lly executed, the length of the axis will be equal to the fide of the fquare bafe of the pyramid.—Jewellers then form the table and collet by dividing the block, or length of the axis, into 18 parts. They take T-g- from the upper part, and from the lower. This gives a plane at diftance from the girdle for the table j and a fmaller plane at diftance for the collet j the breadth of which will be 4 Part I. ■ MINERALOGY. 151 C!afll5xa- tion. be | of the breadth of the table. In this ftate the ftone is faid to be a complete fquare table diamond.—The bril¬ liant is an improvement on the table-diamond, and was introduced within the 17th century, according to Mr Jefferies. II. Genus. ZIRCON. 1. Species. Zircon. Jargon, Kirw. I. 257. Zircon, Haiiy, II. 465. Id. Brochant, I. 159. EJfcn. Char.—Its fpecific gravity about 4.4 *, the joints natural, fome of which are parallel, and others are oblique to the axis of the cryftals. Exter. Char.—Colours reddiih and yellowifli, green- i(h, greenifh yellow, and whitilh. The colour in gene¬ ral varies from green to gray, and is moft commonly pale ; and the poliihed ftone exhibits in fome degree the play of colours of the diamond. It is found in rounded, angular, or flattened grains, or in fmall angular fragments with notched edges, and alfo cryftallized. The primitive form is an odlahedron Hvith ifofceles triangles, and the integrant molecule is an irregular tetrahedron. The following are the moft com¬ mon forms of its cryftals. 1. A prifm with four re£langular faces, each bafe of which has a pyramid with four faces placed on the four lateral faces, which terminates fometimes in a line, hut moft frequently in a point. 2. The preceding cryftal, in "hwh the oppofite late¬ ral edges of the prifm ar® truncated. 3. The cryftal (O in which the edges of the faces of the pyran"^ are bevelled. a ihe cryftid (1.) having the lateral edges of the prifm, and the fummit of the pyramid trun¬ cated. 5. The cryftal (1.) in which the angles between the prifm and the pyramid are bevelled. 6. A prifm with four faces, having the two oppofite narrow, and the two others broad. 7. A double pyramid with four faces, with the edges of the common bafe truncated. 8. The perfeft octahedron w-ith obtufe angles. The cryftals are commonly fmall 5 the furface fmooth, but that of the angular fragments is rough. Luftre, 3 and 4 ; internal luftre, 4 and 3 ; fomewhat vitreous, or approaching to that of the diamond. FraCture imper- feCt or flat conchoidal fragments, 3. Tranfparency, 4, 3. Caufes double refraftion. Hardnefs, 9; brittle. Spec, grav. 4.416 to 4.4700. Chem. Char.—Infufible by the blow-pipe without ad¬ dition, but with borax it forms a tranfparent colourlefs glafs. The following are its cenftituent parts. Zirconia 70 Silica 26 Iron I Lofs 3 100 has been found in Norway, in a^rock compofed of feld- Zircon fpar and hornblende. , genus- Vfes.—The zircon is employed as a precious ftone, and particularly as an ornament in mourning. 2. Species. Hyacinth. Id. Kirw. I. 257. Zircon, Haiiy, II. 467. L'Hijacinthe, Brochant, 1. 163. EJfen. Char.—The fame as the firft fpecies. Exter. Char.—The moft common colour is what is called hyacinth red, blood red, and yellowifh brown. It is found in rounded grains, and frequently in cry¬ ftals, the primitive form of which is the lame as the firft fpecies. The cryftals are, 1. A prifm with four faces. 2. The fame flightly truncated on its edges. 3. The double pyramid with four faces, or a very ob¬ tufe oClahedron, which is a rare variety. 4. A prifm with fix faces, each bale of which is ter¬ minated by an acumination with three faces, placed al¬ ternately on the three lateral edges, forming the rhom- bcidal dodecahedron. The cryftals are commonly fmall, the furface fmooth j external luftre, 3, 4; internal, 4; greafy : fratture ftraight foliated ; cleavage double, rectangular ; frag¬ ments, 3 ; tranfparency, 4, 2 ; caufes double refraction j hard and brittle} unCtuous to the touch when cut j fpec. grav. 4.385 to 4.620. Chem. Char.—By the aCtion of the blow-pipe the hyacinth Iqfes its colour, but retains its tranfparency. It is infufible without borax, which converts it into a tranf¬ parent colourlefs glafs. ConJUtuent Parts. From Ceylon. From Expailly. Zirconia 70 64.5 66 Silica 25 32 31 Oxide of iron 0.5 2 2 Lofs 4.5 1.5 I 100. IJJap. 100.0 Vauq. 100 Vauq. Localities.—It is found in Ceylon in fimilar fituations with the former; in Brazil, Bohemia, and in the rivulet Expailly, in Velay in France; and allb in the neighbour¬ hood of Pifa in Italy. Ufes.~—As it is fufceptible of a fine polifh, the hya¬ cinth has been ranked among precious ftones. Remarks.—The analogy between the cryftalline forms of the zircon and hyacinth; their double refrac¬ tion the fimilarity of their other charafters, and parti¬ cularly the refults of chemical analyfis, have led Haiiy to form them into one fpecies. A variety, under the name of cinnamon Jlone, has been confidered as a diftinCt fpecies ; but the differences are fo very flight, that it may be included in the defcription of the preceding. III. Genus. SILICEOUS. 1. Species. Chrysoberyl. Localities.—The zircon was firft found in Ceylon, ac¬ companied with cryftals of fpinelle and tourmaline, in a river, near the middle of the ifland 3 and more lately it Id. Emm. Wid. Lenz. Kirw. Chryfopa/e, Lam. Cy mophane, Haiiy. Exter. The colour is an afparagus green; , Raffing; 152 M I N E R A L O G Y. Part I * Siliceous pafTing- fnmetimes to a greenifli white, and fometimes to Sen’'ls' an olive green ; fometimes bright brown and yellowiih ' -brown, paiTtng to yellowiih gray ; ahoids a feeble | change of colour from bluish to milky white. ^ It is found in angular or rounded grains, which ap¬ pear to have been water worn ; and in cryltals, exhibit¬ ing, i. A table with fix faces, elongated, of various thicknefs, truncated on the terminal edges. 2. A priftn with four rectangular faces. 3. A prifm with fix faces, of which four are broader and two are narrower oppo- fite to each other. The grains are fliuhtlv rough, and have a confider- able external luflre. The cryflals are ftriated length- wife on their lateral faces j the other faces are fmooth j luflre external very fhining-—internal the fame, inter¬ mediate between that of the diamond and the vitreous luftre. The fraCture is in all directions perfectly conchoida! •, the fragments are indeterminate with fharp edges. It has little tranfparency, but a confiderable degree of hardnefs. Spec. grav. 3.698 to 3.719 Wern. 3.71O Klap. 3.796 Hnuy. Chem. Char.—It is infufible without addition by the a&ion of the blow-pipe. By Klaproth’s analyfis, the following are its conftituent parts. 3. In another variety the fummit of the pyramid is ClalTifica- truneated bv a convex cylindrical plane, the convexity t’°il of which paflTes from one of the fmall oppofite lateral v planes towards the other. 4. In fome inflances the cryflals are fo fmall, that the irnall lateral faces almolt entirely difappear, while the two larger affume a curved form, giving fuch cry- ftals a tabular appearance. f he external furface of the angular fragments and of the rounded crytlals is fcaly, which affords an efihn- ' tia) character to this mineral. The fmall lateral glares are imooth, the broad ones arediflinClly tlriated length- wife, 'Externally the furface is Ihinnig j internally fhining and vitreous. The fraCture in>all direCHons is perfeCHy conchoidal j the form of the fragments is indeterminate, with very fharp edges. It is alnaolt always tianfparent, and re- fraCts double ; it is not fo hard as quartz. Brittle. Spec. grav. 3. 340 to 3.420 Wern. 3.428 Hairy. Chem. Char.—By the aClion of the blow-pipe it is fufed with borax without effervefcence, and affords a greeniih, tranfparent glafs. Conjlituent parts. Cryftallifed. Cut. Cryftallifed. Alumina Silica Lime Oxide of iron. -Lofs 7oJ l8 ’ 6 15 3 Silica 38 Magnefia 39-5 Oxide of iron 19. Lofs 39 43-5 *9 3-5 38 50-5 9-5 2. 100 Localities.—Brazil, Ceylon, Siberia. XJfes.—The hardnefs of the chryfoberyl, and change of colour which it exhibits, have procured it a place a- mong precious ftones of inferior value. It is known in commerce under the name of changeable opal or oriental chryfolite. 2. Species. Chrysolite. hi. Emm. Wid. Lenz. Muf. Lelk. Kirw. Peridot, Daub. Hairy. Exter. Char.—The moft common colour is a bright pifiachio green, paffing to an olive green j fometimes of a bright afparagus or clear meadow green ; rare¬ ly the green approaches tp brown and almoft to a cher- 100 Klap. 100.5 Vauq. looVauq. Localities, &c.—This mineral ;s brought from the Levant, but it is not known whether L. ;s found in Alia or Africa. It has been difcovered in Boheir.t, . an(f cryltallized fpecimens included in a kind of lava, been brought from the ifle of Bourbon. As it is ufually found in rounded fragments, in the midft of earthy fubftances, its relative fituation is fcarcely known. Cfes —The chryfolite has been often employed for various purpofes as a precious ftone, but as it poffeffes no great degree of hardnefs, it is not much efteemed. Subftances of a very different nature have been, at different times, defcribed under the name of Chrysolite. It appears that the yellow chryfolite of the ancients is the fame with our topaz, and that their green topaz is our chryfolite. Plin. lib. xxxvii. cap. 8. ry red. It is found in angular fragments ■with the edges a little notched, or in rounded grains, or in cryftals hav¬ ing the angles and edges a little notched. The forms of its cryftals are, 1. A large re&angular prifm having its lateral edges truncated and lometimes bevelled, and terminated by a fix-ftded prifm, of which two oppofite fides are placed on the fmall lateral faces of the prifm. The four others on the lateral truncated faces, the latter forming a more acute angle than the two for¬ mer. 2. The next form varies from the preceding, in having two additional terminating faces, placed on the broad faces of the prifm, each of which is confequently fituat- ed between two of the planes correfponding to the trun¬ cated planes. 3. Species. Olivine. Ld. Emm. Wid. Lenz. K’rw. Lameth. Chrysolite en grains irreguliers, De Born. Peridot Granu/i- forme. Hairy. Chrysohth des Volcans, of many mi- neralogifts. Exter. Char.—The moft common colour is a bright olive green, fometimes of an apple green, piftachio, or mountain green j a wine, honey, or orange yelloxv, and fometimes alfo a reddilh brown, and browniftr black 5 but thefe latter varieties are rare. It is found in rounded pieces, from the fize of the head to that of a grain of millet, moft commonly included, and diffeminated in bafalt. It has been found cryftal- lized. Internally, 1 A Fart T. Claffifica- tion. MINERALOGY. ' 153 Internally, this mineral varies in its luftre between aiming and weakly Oiining-, in the yellow varieties the luftre is between vitreous and refinous.. The fra&ure is more or lefs conchoidal ; fometimes uneven $ the drape of the fragments is indeterminate, with Oiarp edges. The rounded pieces of a certain fize ore compofed of diftindt granular concretions, with fmall grains. It is fometimes tranfparent, and varies to femitranf- parent and tranilucent. It is brittle and not fo hard as quartz. Spec. grav. 3.225 to 3.265. Chem. t’/wr.—Olivine is infufible by the aftion of the blow-pipe •, in nitric acid it lofes its colour, giving to the liquid a pale yellow colour. Conjlituent parts. Klaproth. Silica 48 to 52.0 \ 52 Magnefia 37 38.5 37-75 Lime CO.25 00.25 0.25 Oxide of iron 12.5 12. i°-75 Lofs 2.25 •— 100.75 100.00—'"102.75 Localities, &c.—Olivine is found in different coun¬ tries, as in Bohemia and Saxony, and in Vivarais in France, and moft commonly in rounded pieces in the cavities of bafalt. Brochant fays that it has not been difcovered in the bafalts of Ireland, England, Sweden, Norway, and Italy. We have, however, collected fpe- cimens of olivine among the bafaltic rocks of the Giant’s Caufeway in. Ireland. Olivine and chryfolite are confidered by Haiiy as one fpecies, and defcribed under the name peridote. 4. Species. Coccolite. Coccolithe, Brochant, ii. 504. Haiiy, iv. 355. D’A,n- drada. Nich. 4to. Jour. v. 495. Exter. Char.—Colour, meadow green, olive, or blackifh green. It is found in maffes which are com¬ pofed of feparate pieces, granular, in fmall grains, which may be ealily feparated thefe grains are angu¬ lar, and difcover fome appearance of tendency to cryftal- lization. Luftre, refplendent, vitreous; fra&ure foliated; clea¬ vage double, as examined by Haiiy, but Angle accord¬ ing to D’Andrada : it is hard, fcratcbes glafs j the grains are often tranflucent. Spec. grav. 3.316 to 3*373- / Chem. Char.—Coccolite is infufible without addition before the blow-pipe. With borax it melts into a pale yellow tranfparent glafs, and with carbonate of potafir into an olive green veficular glafs. Conjlituent parts. Silica $0.0 Lime 24.0 Mawnefia 10.0 Oxide of iron 7.0 Oxide of manganefe 3.0 Alumina 1.5 Lofs 4.5 100 Vol. XIV. Part I. • Localities.—It is found in the iron mines of Hellefta Siliceous and Affebo in Sudermania, at Nerica in Sweden, and SerilH- near Arendal in Norway.' 5. Species. Augite. OElahedral Bafaltine, Kirw. i. 2x9. Id Augite, Bro¬ chant, i. 179. Pyroxene, Hatty, hi. 80. EJfen. Char.—Divifible, parallel to the fides of an oblique rhomboidal prifm, of about 920 and 88®, which is fubdivided in the diredion of the great diagonals of the bafes. Exter. Char.—Colour, olive green, black, white, and gray. It is found fometimes in rounded pieces, and in grains, but molt frequently cryftallized. The primitive form is an oblique-angled prifm, the bafes of which are rhombs ; the integrant molecule is an oblique triangu¬ lar prifm. The form of the cryllals is generally a fix and eight fided prifm, which is terminated by a two fided fummit. The cryftals are commonly fmall, fmooth, and brilliant, fometimes a little Oiining. Internal luftre lluning, and almoft refplendent, refinous. Fradure perfedly foliated j cleavage double ; tranflucent at the edges; harder than olivine ; gives lively iparks with ft eel, and fcratches glafs } rather brittle j fpec. grav. 3.226 to 3.777. Chem. Char.—Fufible before the blow-pipe with dif¬ ficulty, and only in fmall fragments, which melt into a black enamel. Conjlituent parts. From JEtna, Vauquelin. Silica 52 Lime *3-20 Alumina 3.33 Magnefia 10 Oxide of iron 14.66 Oxide of manganefe 2 Lofs 4.81 IG0.00 From Arendal, Roux. 45 3®-5 3 16 J •5 100. Localities, &c.—Augite is found in bafalt along with olivine and hornblende, in Bohemia, Hungary, and Tranfylvania j in the bafalt of Arthur’s-feat near Edin¬ burgh. 6. Species. Vesuvian. La Vefuvienne, Brochant, i. 184. Idocrnfe, Haiiy, ii- 574- EJfen. Char.—Divifible, parallel to the faces and diagonals of a redangular prifm, with fquare bafes $ melts into a yellow glafs. Exter. Char.-—Colour brown, orange, dark green, and yellowifh green. This mineral is found maflive, difleminated, or cry¬ ftallized. Primitive form^ a redangular prifm, little different from a cube ; integrant molecule a triangular priim. The forms of its cryftals are, a redangular prifm, with four fides, truncated on all its edges, or truncated on its lateral edges or a fix-fided prifm truncated on all its edges. The cryftals are ufually fmall, fingle fometirnes, and fometimes in groups. Lateral planes longitudinally ftreaked. Some are U fmooth j 15+ MINER SUicecus frnooth; luflre rerplendcnt, vitreous 5 internal luftre , . fliining, refmous.. Fracture imperfeclly conchoidal, fome- times uneven, often alfo foliated. Fragments indeter¬ minate, with rather tharp edges. Tranflucent, and al- moft femitranfparent j hard, brittle ; fpecific gravity 3>365 t0 3-42°- C/iem. Chat\—Fuiible without addition into a yellow glafs. Conflituent Parts. Klaproth. From Vefuvius. From Siberia. Silica, 35.50 42 Lime, 33. 34 Alumina, 22.25 Oxide of iron, 7.5 5-5° Oxide of manganefe, .25 an atom. Localities, &c.—It is found in the neighbourhood of Vefuvius, accompanied by limeftone in fmall grains, feldfpar, mica, hornblende, and calcareous fpar ; and it is fuppofed to have been thrown out of the volcano un¬ changed. In Siberia it is found in fteatites, fometimes mixed with cryftals of magnetic iron. Ufes.—At Naples it is employed as a precious ftone. 7. Species. Leucite. A L O G Y. Part I, rocks of Bohemia, and alfo, it is faid, in a granitic Claffifisa- rock in the Pyrenees. bon. 8. Species. Melanite, or Black Garnet. La Melanite, Brochant, i. 191. Exter. Char.—Colour velvet black, or brownifli or grayilh black. It is moll commonly found cryftal- lized, in fix-nded prifms, teiminatedi at each extremity by an obtufe acumination, with three planes placed al¬ ternately on three of the lateral edges j the prifms are fometimes truncated on all the edges, and fometimes only the lateral edges. The furface is fmooth and fhining. Internal luftre Ihining. Frafture imperfefl, flat, conchoidal. Fragments indeterminate, fharp- edged, opaque, hard, and rather brittle. Spec, grav, 3.691 to 3.800. Conjlituent Parts. Vauquelin. Silica, Alumina, Lime, Oxide of iron and of manganefe, Lofs, 35 6 32 2 5 2 La Leucite, Brochant, i. 188. Vefuvian, Kirwan, i. 285. jlmphigene, Haiiy, ii. 559. EJJen. Char.—Divifible, parallel to the faces of a cube, ana at the fame time to thofe of a rhomboidal dodecahedron. Exter. Char.—Colour grayifh or yellow white. It is rarely found maflive or in grains, but moll fre¬ quently cryftallized. The primitive from of its cryftals is the cube ; the integrant molecule an irregular tetrahe¬ dron ; the moft common form of the cryftals is a ftiort double pyramid with eight faces oppofed bafe to bafe, each fummit of which is furmounted by an obtufe ac- cumination with four faces, correfponding alternately to the four lateral edges of the pyramid, and thus producing a figure of twenty-four trapezoidal faces; the cryftals are commonly fmali, the furface rough and dull, or at moft feebly Ihining. Internal luftre Ihining, vitreous. Fraflure foliated, fometimes conchoidal. Fragments indeterminate with ftiarp edges. Semitranfparent or tranftucent. Scarcely fcratches glafs. Brittle. Spec, grav. 2.455 to 2-49°* Chem. Char,— Infulible before the blow-pipe, but with borax gives a tranfparent glafs. Conjlituent Parts. Klaproth. Vauquelin. Silica, 54 56 Alumina, 24 20 Potafti, 21 20 Lime, — 2 Lofs, 1 * 2 too 100 L.oca/ilies, &c.—Leucite is found in the lavas of Ve- fiivlus, and in the bafalts of Italy j in bafalts and other 100 Localities.—It has been found only at Frefcatiand St Albano near Rome. 9. Species. Garnet. Le Grenat, Brochant, i. 193. Garnet, Kirwan, i. 238. Grenat, Haiiy, ii. 540. EJfen. Char.—Specific gravity at leaft 3.5. The forms derived from the rhomboidal dodecahedron. The primitive form is a rhomboidal dodecahedron. The inclination of each rhomb to the two adjacent is J 20°, the plain angles 109° 28' 16" and 70° 31' 44". The integrant molecule is the tetrahedron, whofe faces are ifofceles triangles equal and fimilar. The garnet is divided into three fubfpecies, the pre¬ cious, common, and Bohemian garnet. Subfpecies 1. Precious Garnet. Exter. Char.—Colour red, of which there are fever- al varieties, as blood red, cherry red, hyacinth red, fometimes brown and even black. The garnet is rarely found maflive or diffeminated, but fometimes in rounded grains, and moft frequently cryttallized, of which the following are the forms. 1. A prifm with fix fides terminated by a double obtufe fummit with three faces, correfponding alternate¬ ly to the three lateral edges at each end of the prifm, and thus forming a rhomboid of twelve faces. 2. The fame cryftnl truncated on all its edges, form¬ ing a figure of 36 faces. The faces of the truncations are elongated hexagons. 3. A fhort double pyramid, with eight faces oppo¬ fed bafe to bafe, the fummits of each of which are fur- mounted by ati obtufe acumination, correfponding al¬ ternately to the four lateral edges of one of the pyra¬ mids,_ Fart I. M I N E R A L O G Y. 155 Claffifica- tnids, forming a cryflal of 24 fides, which are pretty t^on‘ equal trapezoids. “—r'' The preceding form with twelve truncations ; eight on the eight acute alternating angles of the two lummits, and four on the obtufe angles of the common bafe of the two pyramids, making in all 36 faces. The furface is a little unequal in the grains, fmooth in the cryftals, and almoft always llreaked diagonally. The luftre varies from fhining to refplendent, and is vitre¬ ous. Fradture more or lefs perfectly conchoidal,fomctimes uneven or fplintery, and fometimes foliated. Frag¬ ments indeterminate with fharp edges. Tranfparent or tranflucent. Scratches quartz. Refradlion Ample. Brittle. Spec. grav. 4.085 to 4.352. Chem. Char.—Before the blow-pipe it is fufible into a dark enamel. Conjiituent Paris. Klapioth. Vauquelin. Silica,_ 35.75 36 Alumina, 27'25 22 Lime, — 3 Oxide of iron, 36 41 Oxide of mangantfe, .25 — Lofs, .75 100.00 102 caceous fchillus, gneis, ferpentine, and other primitive Siliceous rocks, in Saxony, Bohemia, France, Sweden. . ge-ius‘ U/es.—It is rarely employed as a precious Hone, but frequently as a flux for iron ores. Subfpecies 3. Pyrope, or Bohemian Garnet. Pyrope, Brochant, ii. 498. F.ffen. Char.— The fame as the garnet. Exier. Char.—This mineral is found in fmall, round angular fragments : it is never cryftaliized. Colour dark blood red, which, by holding it between the eye and the light, becomes yellow7. LuILe re¬ fplendent,. vitreous. Fraflure conchoidal. Fragments indeterminate and Iharp-edged. Perfe&ly tranfparent. Scratches quartz. Spec. grav. 3.7 i 8 to 3.941. Conjiituent Parts. Klaproth. Silica, 40 Alumina, 28.5 Lime, 3.5 Magndia, 10 Oxide of iron, 16.5 Oxide of manganefe, ,25 Lofs, 1.25 100 Localities, &c.—The garnet is not uncommon in moft countries of the world, and it is fuually found in primitive rocks. Ufes.—It is employed as a precious ftone. The precious garnet is fuppofed to be the carbuncle of the ancients. Subfpecies 2. Common Garnet. Effen. Char.—The fame as the precious garnet. Exter. Char.—It is found maffive and diffeminated, and alfo fometimes cryftallized. The forms of the cryftals are the fame as thofe of precious garnet. The furface of the cryftals is diagonally ftreaked. Colour brown, green, greenilh black, brownifti red, and orange yellow. Luftre fhining, refinous, or vi¬ treous. Fra&ure uneven, fometimes fplintery. Frag¬ ments fharp-edged. Rarely tranfparent, fometimes tranflucent, and commonly at the edges j not fo hard as the precious garnet. Brittle. Spec. grav. from 3.668 t0 3*757- Chem. Char.—Melts before the blow-pipe into a dark enamel, and eafier than the former. Conjiituent Parts. Black Garnet. Silica, Alumina, Lime, Oxide of iron, Water, Lofs, 43 16 20 16 4 1 Vauquelin. Yellowift Garnet. 33 20 31 10 100 xoo Localities, &c.—The common garnet is found in mi- Localities,&.c.—This mineral is found in ferpentine in Saxony ; the moft beautiful are from Bohemia, where it is found in alluvial land. Ufes.—It is employed in jewellery. The fmall grains are ufed as a fubftitute for emery in polilhing. This mineral is formed into a feparate fpecies by fome, and is diftinguilhed from the garnet by its colour, want of cryflallization, and tranfparency; but thefe differences in the external charafters Haiiy confiders as infufhcient to conflitute a different fpecies of two mi¬ nerals w7hich agree in a greater number of other cha- radters. Magnefia indeed has been detedled in the lat¬ ter as one of its conftituents, no trace of which has been yet difcovered in the former. 10. Species. Grenatite. Grenatite, Brochant, ii. 496. Id. Sauffure, § 1900. Staurotide, Hairy, iii. 93. Pierre de Croix, De Lifle, i;- 434* s EJfen. Char.—Divifible parallel to the fides of a rhomboidal prifm, whofe angles are equal to 1290 30', and 50° 30', which may be fubdivided in the direction of the ftiort diagonals of the bafes. Exter. Char.—Grenatite is always found cryftall’zed. The piimitive form is a rectangular prifm with rhom¬ boidal bafes, having the angles inclined, as mentioned in the effential character. The integrant molecule is a triangular prifm. It is frequently met with in double cryftals, crofting each other in the form of a crofs, from which the name is derived, fometimes at right angles, and fometimes obliquely 5 fometimes alfo there are ob¬ lique triple croflings. The furface is fmooth and ftiin- ing, or uneven and dull. The colour is reddifti or blackhh brown ; internal luftre fhining, between vitreous and reftnous. Fradture U 2 imperfedtly 156 MINERALOGY. Siliceous imperfeftly foliated, in tlie direfHon of the axis ; in . other dhe6tions uneven, fraall grained, or fometimes a little conchoidal; often opaque, fometimes tranflucent. Scratches quartz feebly : fpecitic gravity 3.2861. Chem. Char.—Before the blow-pipe it becomes brown without fufion, ajid is then converted into a fritty lub- ftance. Part I. Exier. Char.—Spindle is found in rounded grains, or Clailitisa- ConJHtuetit Parts. Silica Alumina Lime Oxide of iron Oxide of manganefe Lofs Vauquelin. 33- 44. 3-84 T3* _Li 100. Localities, See.—It is found in fmall cryftals in mi¬ caceous fchiftus, at St Gothard in Switzerland, in Brit¬ tany in France, and in Spain, in primitive rocks. 11. Species. Ceylanite. Pleonqfte, Hairy, iii. 17. Spinelle Pleonajle, Brong- niart, i. 438. EJfen. Char.—Scratches glafs flightly, and is divifible into a regular offahedron. Exter. Char.—This mineral is found in rounded maf- fes, and alfo cryftallized. Primitive form of the cryf¬ tals, a regular o&ahedron. The integrant molecule a regular tetrahedron. The edges of the o&ahedron are fometimes truncated, and form a regular 12 fided rhom¬ boid. The cryllals are fmall ; the fradlure is conchoi¬ dal ; the luftre fhining and vitreous. The colour is fometimes perfe&ly black, brown, bright blue, purplifh red, or dark green. It is hard, but rot very brittle. Spec. gray. 3.76 to 3.79. Chem. Char.—Infufible before the blow-pipe. Conjlltuent Parts. Defcotils. Alumina 68 Magnefia 12 ~ Silica 2 Oxide of iron 16 Lofs 2 100 Localities, &c.—This mineral is met with in the ifland of Ceylon, along with tourmaline and other cryftallized fubftances, which have been carried from their native repofitories by means of water. It has been found alfo in difleminated cryftals in the cavities of the lava of Vefu- vius; and very "fmall blue cryftals of ceylanite have been obferved in the volcanic (bafaltic) rocks at Clofterlach on the banks of the Rhine. 12. Species.. Spinelle. Spinel and Balafs Ruby, Kirw. i. 253. Le Spinel, Bro- chant, i.,202. Spinelle, Hairy, ii. 496. EJJen. Char.—Scratches quartz ftrongly ; the primi¬ tive and common foim, a regular octahedron. cryftallized : the primitive form of the cryftals is a re¬ gular oftahedron ; the integrant molecule the regular tetrahedron. Its utual forms are a double pyramid with four faces applied bafe to bafe, conftjtuting a perfect o&ahedron •, or it is truncated on all its edges, or only on thole of the common bafe of the two pyramids. It is met with alfo in the form of a double cryftal, com- pofed of two oftahedrons, which are often flattened. Colour ulually red, of various (hades, from carmine red to rofe red ; fometimes reddifh white, and orange yellow. Faces of the oddahedron fmooth, thofe of the truncations longitudinally ftreaked. Luftre refpiendent, vitreous; frahlure conchoidal; the longitudinal fraddure is foliated ; fragments indeterminate, fharp-edged ; fe- mitranfparent, and fometimes tranfparent. Scratches quartz ; is fcratched by fapphire. Spec. grav. 3.570 to 3-645. Chem. Char.—Before the blorv-pipe it is infufible ; but with borax it melts, and without frothing up. tiun. "V Alumina Silica Magnefia Oxide of iron Lime Chromic acid Lofs Cenjlituent Parts. Klaproth. 74-50 ^■SO 8.25 1.50 •IS 100.5 Vauquelin. 82.47 8.78 J£_ 6.l8 2-57 '100 Localities, &c.—Cryftals of fpinelle are found in Cey¬ lon, in a river which comes from the high mountains in the middle of that iiland : they are accompanied with zir¬ con, tourmaline, and different other ftones. It is found alfo in Pegu. Ufes.—Spinelle is ranked among precious ftones, and is greatly efteemed when it is of a certain fize. It is faid that a fine fpinelle ruby, whofe weight exceeds four carats, is worth half the price of a diamond of the lame weight. 13. Species. Sapphire. Oriental Ruby, Sapphire, and Topasa, Kirwan, i. 250. Le Saphir, Brochant, i. 207. Telejie, Haiiy, ii. 480. Ejfen. Char.—Specific gravity about 4; natural joints very diftindl, and perpendicular to the axis of the cryftals. Exter. Char.—Sapphire is found in fragments, in rounded pieces, and alfo cryftallized. The primitive form of the cryftal, according to Hairy, is a regular fix-fided prifm, and the integrant molecule is a triangu¬ lar, equilateral prifm ; but, according to Bournon, the primitive form is a rhomboid, whofe angles are 96® and 84°. The ufual forms of the cryftals are, 1. A fmall fix-fided prifm. 2. A pyramid with fix faces, very (harp, double, the two pyramids applied bafe to bafe. 3. I he fame cryftal with the lummit truncated. 4. A pyramid with fix faces, double ; the two pyramids applied bafe to bafe, but lefs iharp than the Tecond form. The fur- face of the cryftals is fmooth, and often ftreaked tranf- verfely. The Part I. MINER Claffifka- TKe principal colour is blue, varying between Pruf- tion fian and indigo blue ; other varieties are of a deep vio- '“■—'"v let blue. Sapphires are alfo found red, yellowifh, and greenifh. Two or three colours appear in the fame cryital, fometimes in bands and fometimesin concentric circles. Externally, the luftre of the fapphire is Ihin- ing -, internally, refplendent and vitreous. Fra&ure perfeftly conchoidal. Fragments (harp edged •, tranfpa- rent or femitranfparent, fometimes only tranflucent. Scratches all other earthy fubftances. Brittle. Spec, grav. 3.991 to 4.283. Chan. Char.—Infufible before the blow-pipe. Melts with borax without intumefcence. The blue variety, expofed to a ftrong heat, lofes its colour, Hahy. Conjlituent Parts. Alumina Silica Lime Oxide of iron, Klaproth. 98-5 00.y 1. 100 Alumina Silica Oxide of iron Lofs Sapphire. 92 5.25 I. i-75 Bergman. 58. 35- 5- 2. 100 Oriental Ruby. 90 7 1.2 1.8 100 100 Localities, &c.—The fineft fapphires are brought from Pegu and the illand of Ceylon. The fapphire is alfo found in Bohemia, accompanied with zircon, Bohe¬ mian garnet, and magnetic iron 5 and in the river Expail- ly in France. \Jfes The fapphire, next to the diamond, is the moft highly valued of precious ftones. 14. Species. Corundum. Corindon, Hairy, iii. 1. Adamantine Spar, Kirw.i. 335. Le Spath Adamantin, Broch. i. 356. EJfen. Char.—Scratches quartz j divifible into a rhomboid fomewhat acute. Exter. Char.—This mineral is found maffive, difie- minated, and cryftallized j 1. In fix-lided prilms, ha¬ ving the extremities broken, and the faces fometimes unequal. 2. A fix-fided prifm, terminated by a fix* fided pyramid. 3. A pyramid with fix ihort faces, whole fummit is ftrongly truncated ; and, 4. The pre¬ ceding cryftal terminated by a three-fided pyramid. From the inveftigations of Count de Bournon and Mr Greville, it appears that the cryftallization of corundum * Thil. is fimilar to that of the fapphire *. Luftre, which is Jz-AM/hypS. jnterme4iate between refinous and vitreous, Ihining or weakly Ihining ; crofs fra&ure uneven, or fplintery, fome¬ times foliated } fragments rhomboidal, fometimes ftiarp- cdged. The colour is greenilh white, greenilh gray, and alpa- ragus green, tranflucent at the edges; refraction dou¬ ble. Extremely hard. Spec. grav. 3.710 to Chem. Char.— Entirely infufible before the blow-pipe. A L O G Y. Conjlituent Parts. Klaprath. From China. Silica Alumina Oxide of iron Lofs 6.5 84. 7*3 2. From Bengal. 5-5° 89.50 1.25 3-75 100 100 According to Chenevix. From the Carnatic. From Malabar. Silica 5 Alumina 91 Oxide of iron 1.5 Lofs 2.5 7 86.5 4 2-5 ICO IOO *57 Siliceous genus. Localities.—Corundum is found in a hard rock near the river Cavery, fouth of Madras j on the Malabar coaft ; in the ifland of Ceylon j in the kingdom of Ava > and in China. iy. Species. Adamantine Spar. Exter. Char.—This mineral, which ought undoubt¬ edly to be confidered as a variety of corundum, is found maffive, in rolled pieces, and cryftallized in fix fided prifms, and fix-fided acute pyramids with truncated ex¬ tremities. Internal luftre fplendent j frafture foliated $ fragments rhomboidal. Colour dark hair brown 5 very hard. Spec, grav,- 3.98!. Conjlituent Parts. Klaproth. From China. Silica, 6.5 Alumina, 84^ Oxide of iron, 7.5 Lofs 2 TOO Localities.—This mineral has been only met with in China. 16. Species. Emery. Fer Oxyde ^nartxdjere, Haiiy, iv. 112. Emery, Kirw. ii. 193. VEmeril, Broch. ii. 292. EJfen. Char.—The powder fcratches all bodies except the diamond. Exter. Char.—This mineral is found maffive and dif- feminated. The luftre is glimmering or weak ftrining, and adamantine. Fradlure fine-grained, uneven 5 fragments a little blunt edged. Colour grayifti black, bluilh, fmoke or fteel gray ; generally opafjue, but fometimes tranflucent at the edges : extremely hard. Spec. gr. about 4. Chem. Char.—Becomes black under the blow-pipe, but is infufible. Colours borax of a dirty yellow. ConJlitutnU. *58 MINE R g: nus. ConJHtuent Parts* Tennant. Alumina, 86 Oxide of iron, 4 Loft, 7 * P&iJ. Trent/. rSoz.p.^oo. ICO * _ Localities*, &c.—1'his mineral is found in Saxony, dhTeminated in a bed of indurated fteatites, mixed with common talc ; alio in the ifland of Naxos in the Ar¬ chipelago ; and in Italy, Spain, and Peru. Vfes Emery, as well as the two former fpecies, is employed, when reduced to powder, in cutting and po- liihing hard ifones, glafs, and metals. Not only the external charadlers, but alfo the near approach in the proportion of their confiituent parts, of the three fpecies laft deferibed, would lead to confider them as the lame fpecies, or at leaft as varieties. Eme¬ ry is by forne mineralogilts arranged among the ores of iron. 17. Species. Topaz. Occidental Topa%, Kirw. i. 254. La Topa%ey Broch. i. 212. Topatae, Haiiy, ii. 504. Eflen. Ortr.—Refra&ion double 5 joints very diflindl j perpendicular only to the axis of the cryftals. hxter. ihe topaz is fometimes found maffive, femetimes dilTeminated, and fometimes in rounded frag¬ ments^ but it is moft commonly cryftallized. The primitive form of its cryilals is a right angled prifm, whofe bafes are rhombs, and having the large angle I245’ 22'; the integrant molecule is the fame. The moil common forms of the topaz are, 1. A prifm with eight fides, terminated at the one end by a four-fided fummit, and at the other (which but rarely happens), by one of a different form. In a variety or the Brazilian topaz, the one fummit prefents hx fides, ana the other ten £ and the eleclricity exhi¬ bited by the latter by means of heat, is negative, while liiat oi the former is pofitive. This difference in the two oppofite fummits of a cryftal, as has been obferved by Hauy, is a peculiarity in all cry Hals which acquire by means of heat two kinds of eleblricity. 2. The next common form of the topaz Is an eight- lided prifm, whofe bafe is horizontal, and bordered with a row of fix oblique faces. This variety, which is found m the mines of Saxony, becomes readily elec¬ tric by frifiion, but not by heat. . Tlle prevailing colour of the topaz is yellow of va¬ rious fiiades. The cryftals are of middling fize; their lateral faces are fometimes convex and cylindrical; the fur face of the fame faces is longitudinally ftriated, while that of the other faces is fmooth. Luftre vitreous; crofs fradlure perfe&ly foliated; longitudinal fra&ure concn01 dal ; fragments indeterminate ; tranfparent,; lometimes lemitranfparent or tranflucent ; refradlion double ; fcratches rock-cryftal. Spec. grav. 3.464 to them. Char.—Infufible before the blow-pipe, but melts with borax without intumefcence, The Brazilian A L O G Y. Part I. topaz heated in a crucible affumes a rofe red colour, Ciaffifka- when it is called by the jewellers rtthy of Brazil. The tion- Saxon topaz becomes white when expofed to heat; and v™"" thus deprived of colour, is fold for the diamond. Ac¬ cording to Vauquelin, all the varieties of topaz reduced to powder, and added to fyrup of violets, at the end of two or three hours communicate a green colour. Conjlituent parts. According to Klaproth and Vauquelin. Alumina Silica Fluoric acid Iron Localities, &c.—The topaz is found in different parts of Saxony, particularly in the mountain Schneecken- ftein, which is denominated topaz rock, and is arranged with the primitive mountains. In this rock the topaz ,s mixed with quartz, fchorl, mica, and lithomarga. Near Zinnwald it is found in granite. It is alfo found mixed with ores of tin. In Siberia the topaz is found in graphic granite, accompanied with beryl, quartz, and garnet. Topaz is alfo met with in Brazil and Alia Minor. Ufes—The topaz is employed for the purpofes of jewellery as a precious ftone, but it is not confidered of very great value. 18. Species. Pyrofhysalite. This mineral which was deferibed and analyfed by Hiienger and Berzelius, is of a greeniih white colour. When thrown on hot coals it becomes phofphorefcent, and gives out a greeniih tlame. When it is ftrongly heated by the action of the blow-pipe, the furface is covered with fmall veficles which explode. Thefe phe¬ nomena are aferibed to the fluate of lime which forms one of its conftituent parts, and which fometimes ap¬ pears furrounding it with a cruft. Localities, &c.—Oahn found this ftone at Fmbo near Fah4un in Sweden, in nodules imbedded in a granite, compofed of white quartz, feldfpar, and filvery mica. The nodules are feparated from the rock by a greenifh yellow talc f. \Brongni- 19. Species. Euclase. anf, 11.401. Id. Haiiy, ii. 531. Id. Brochant, ii. 508. LJJen. Char.—Divifible by two longitudinal lines per¬ pendicular to each other. Exter. Char.—This mineral has only been found cry¬ ftallized.- The primitive form of the cryftals is a redt- angular prifm vvith fquare bafes, and that of the inte¬ grant molecule is the fame. The moft common form under which it appears is an oblique four-fided prifm with the edges truncated in various ways. The cry¬ ftals are ftreaked longitudinally. The luftre is refplen- dent and vitreous. Longitudinal fradlure foliated ; crofs fradlure conchoidal. Colour, bright fea green. Tranfparent, and refradls double. Scratches quartz. Very frangible, hence its name fignifying eaftly broken. Spec. grav. 3.062. Chem. Char.—Lofes its tranfparency before the blow¬ pipe, and melts into a white enamel. ConJUtuent 47 to 50 28 to 30 17 to 20 o to 4 Fan T. MINERALOGY. Clarifica¬ tion. Cotijlituent parts. Vauquelin. Silica 35 to 36 Alumina 18 19 Glucina 14 15 Iron 2 3 Lofs 31 27 21. Species. Beryl. ulqua Marina et Samaragdus, Beryllus, Wallerius, i. 254. Aigue Marine de Siberia, Rome de Lille, ii. 252. Id. De Born, i. 71. Beryl, Kirvv. i. 248. Le Beril Noble, Brochant, i. 220. Emeraude Lim¬ pid e, vert-bleuatre,jaune-verdatre, &c. Haiiy, ii. 521. IOO 100 Localities.—This mineral was brought from Peru, and has never been found any where elfe. It was in Angle cryftals, fo that its repofitory is unknown. It is by fome mineralogifts arranged among the ores of iron. 20. Species. Emerald. Id. Kirw. i. 247. VEmeraude, Brochant, i. 217. Emeraude, Haiiy, ii. 516. / EJJen. Char.—Scratches glafs eafily ; divifible, paral¬ lel to the faces, and to the bafes of a regular hexahedral prifm. Exter. Char.—The emerald is only found cryllal- lized, and the primitive form of its cryftals is a regular Ax-fided prifm j the integrant molecule is a triangular prifm, the Ades fquare, and the bafes equilateral tri¬ angles. The ufual forms are, 1. A perfeft Ax-Aded prifm j 2. Truncated on its lateral edges j 3. Trun¬ cated on its terminal edges; 4. Truncated on its ter¬ minal angles; and, 5. Having the terminal edges be¬ velled. The cryflals are feldom large. Their lurface is fmooth and Alining ; internal luAre Alining and re- fplendent; vitreous ; frafture conchoidal or unequal, fometimes tranfverfely foliated ; fragments indetermi¬ nate, Aiarp edged. Colour emerald green of all Aiades; mo A commonly tranlparent, fometimes only trar.Aucent; refraflion dou¬ ble ; with diAiculty fcratches quartz. Spec. grav. 2.600 to 2.775. Chem. Char.—FuAble before the blow-pipe, but with diAiculty ; melts readily with borax. Conjlituent Parts. Vauquelin. Klaproth. Silica. 64.50 68.50 Alumina 16. 1 i-75 Glucina 13. 12.50 Oxide of chromium 3*25 .30 Lime ^ 1.60 .25 Oxide of iron Water 2. 100-35 98.3 Localities, &c.—The AneA emeralds are brought from Peru, where they are found in veins or cavities of the granite mountains. They are alfo found in Upper Egypt, Ethiopia, and in the iAand of Ceylon. The emerald is accompanied by calcareous fubAances, as carbonate of lime and gypfum. Vfes.—The rich green of the emerald has obtained for it a high rank among precious Aones, and it is em¬ ployed for Amilar purpofes. Effen. Char.—The fame as the emerald. Exter. Char.—The beryl is fometimes found in round¬ ed fragments, but moA commonly cryAallized, and the forms of its cryAals are the fame as the emerald. The lateral faces of the cryAals are deeply Ariated. The colours of the beryl are ulually a pale or yel- lowiAi green ; external luAre Arming ; internal refplen- dent, vitreous ; longitudinal fra&ure conchoidal, or fo¬ liated. Cleavage fourfold. Fragments indeterminate and Aiarp-edged ; often tranfparent, fometimes femi- tranfparent, and tranflucent. The latter variety is di- Ainguilhed by tranfverfe rents. Refraction in a Aight degree double ; nearly as hard as topaz ; brittle ; fpec. grav. 2.65 to 2.75. Becomes eleftric by friCHon. Chem. Char.—Before the blow-pipe it is fuAble, but with diAiculty, and yields a white, fcarcely tranAucent glafs. Conjlituent parts. Vauquelin. Rofe. Silica 68 69 Alumina 15 14 Glucina 14 14 Lime 2 Oxide of iron 1 1 100 98 Localities, &c. The beryl is brought from the EaA Indies, and from Brazil ; but the AneA and pureA are found in Daouria, on the frontiers of China, in the neighbourhood of Nertfchink ; and the matrix of thefe beryls is faid to be an indurated clay, refembling jaf- P^r- The beryl is alfo found in Siberia, where it is ulually accompanied with quartz, feldfpar, garnets, tour¬ maline, mica, and Auor fpar, in the veins of primitive mountains. The beryls from Siberia are almoA all found in graphic granite. Beryl is alfo found in Saxony, and lately in France, in a large vein of quartz traverfmg graphic granite. Dolomieu found the beryl perfeflly tranfparent and colourlefs, in the granite of the iAand of Elba. Vfes.—The beryl is employed as a precious Aone, but is not greatly eAeemed. Remarks.—The emerald and the precious beryl ap¬ proach fo nearly to each other, not only in the forms of their cryAals, which are almoA the fame, and in their conAituent parts, which aAbrd but Aight varia¬ tions, but alfo in their other characters, that they ought to be conAdered, as has been doire by Haiiy, as varieties of the fame fpecies. The only differences which exiA between them feem to be accidental. Thefe are chieAy in the colour, and in the cryAallization ; the former of which is a Aner green, and the latter is more perfedt in the emerald than in the beryl. The colouring matter of the emerald is oxide of chromium, while that of the be- ryl i 159 Siliceous genus. 'i6o MINERALOGY. Part T. S iceous ryl is oxide of iron. In all tlie other charadlers they genus. are nearly the iame. 22. Species. Schorlite, or Schorlous Beryl. Schorlitc, Kirw. i. 286. Le Beril Schorliforme, Bro- chant, i. 224. Leucohte and Pycmte, Hauy, iii. 236. PJfen. Char.—Infufible. Original form of the cryftals a regular hexahedral prilm. Exter. Char.—This mineral is ufually found cryftal- lized, in longiih maffes, mixed with osher fubftances, < and generally imbedded in granite ; the form of the cryftals when they are regular, is a fix-fided prilm, which is fometimes truncated on its terminal edges, and fometimes the form difappears from its being deeply and longitudinally ftriated. The cryftals are generally large. » Colour white, ftraw yellow, or reddifti. Tranflucent or'nearly opaque. External luftre fhining, between vi¬ treous and relinous. Crofs fra the furface and in the fiflures of an argillaceous rock, accompanied by quartz, amianthus, and feldfpar, and in the Pyrenees in linieflone ; near Arendal in Nor¬ way ; and in argillaceous fchidus, north end of the ifland of Arran in Scotland. 25. Species. Zoysite. This mineral which was difeovered by Baron de Zoys, and therefore bears his name, is confidered by Hauy as a variety of Epidote. It appears in prifms wrhich are deeply furrowed or rhomboidal, and very much flattened. They are of a gray colour, or grayilh yellow, with a pearly luflre. Localities. Zoyfite is found particularly in Carin- thia, and alfo in the Tyrol and in the Valais *. 26. Species. Axinite, or Thumerstone. * Brongni- art, ii. 40c. Id. Kirwx i. 273. La Pierre de Thum, Brochant, i. 236. Axinite, Hauy, iii. 22. Effen. Char.— Divifible parallel to the faces of a rhomboidal prifm of ioi^8, and 78!®. X Enter. 3 62 M INERALOG Y. Part I. Siliceous Exler. Char.—Thumcrftone is found in maffes, dif- genus. femjnate(J ancJ cryftalllzed. 1'he primitive form of its cryftals is a right-angled prifm, vvhofe bafes are ob¬ lique-angled parallelograms, having their angles of ioi® 32', and 78° 28'. The integrant molecule is an ob¬ lique triangular prifm. The moll common form of its cryftals is a quadrangular prifm, fo oblique and flatten¬ ed, that its angles become as {harp as the cutting part of a hatchet. The faces of the cryflals are longitudi¬ nally filiated, but the truncated faces are fmooth. Ex¬ ternal luflre fplendent j internal finning and vitreous. Erasure vitreous, fometimes rough and fplintery. Frag¬ ments indeterminate, fliarp edged. Maflive thumer- ilone is compofed of feparate teflaceous, thin, and flightly curved concretions, with a fmooth furface, which is fomevvhat irregularly flriated. The colour is clove brown, varying to violet blue, yel- lowifh, and greenifh gray. Maffive thumerflone is only tranflucent. The cryftals are femitranfparent, and fome¬ times tranfparent. It is harder than feldfpar, but lefs fo than quartz; gives fire with fteel, and diffufes an odour fimilar to what is produced by flint. Brittle. Spec. grav. 3.213 to 3.300. Client. Char.—Thumerflone froths up under the blow-pipe, and is converted into a grayifh enamel, and with borax into a fine olive green enamel. Conjiituent Parts. Silica, Alumina, Lime, Oxide of iron, manganefe Lofs Klaproth. 52.70 25-79 9-39 8.63 1. 2.49 Vauquelin. 44 18 J9 *4 4 1 100.00 100 Localities, See. Thumerflone, which is hitherto a rare mineral, has been only found in veins and fiflures of primitive rocks, and chiefly in rocks with a bafe of ferpentine. It is ufually accompanied with afbeflus, rock cryftal, and fometimes calcareous fpar. It was firil difeovered at T1 um in Saxony, from which it de¬ rives its name ; but has been fince found in the Pyre¬ nees, in France, at Mount Atlas in Africa, and in Norway. 27. Species. Quartz. E(Ten. Char.—Divifible into a rhomboid, which is Hightly obtufe. Quartz, which is found, either maffive, cryflallized, or in rounded pieces, is one of the roofl abundant mi¬ neral fubftances. The primitive form of its cryflals is a flightly^obtufe rhomboid, of 940 4', and 85° 56k The integrant molecule is a regular tetrahedron. On account of the variety of forms and appearances, quartz has been divided into fubfpecies; into fiveby Wer- nCr ; by others only into two, viz. rock-cryilal and common quartz. We fhall nearly follow- the former fub divifions, which are, amethyfl, rock-cryftal, milk-quartz, common quartz, and prafe, including alfo ferruginous quartz. Subfpecies r. Amethyst. Id. Kirw. i. 264. VAmethyste, ^uart%-hyalin Violet, Hauy, ii. 417. Exter. Char.—The amethyft is found frequently cry- Claffifka- flallized, but it is alfo found maffive and in rounded . pieces. 1. The form of its cryflals is a regular fix-fided prifm, terminated by a fix-fided pyramid, the Tides of which correfpond to thofe of the prifin. 2. A double fix fided pyramid. Fradlure conchoidal, rarely fplin¬ tery or fibrous. Fragments indeterminate, fometimes wedge-fhaped. Maffive amethyfl is compofed of fepa¬ rate pieces, wdiich are fometimes granulated, fometimes fcopiform when the cryflals are combined together. The colour is commonly violet blue of various (hades, blackifh brown and greenifh white. External luflre refplendent ; internal refplendent and fhining, vitreous. It varies between tranfparent and tranflucent. Scratches glafs. Brittle. Spec. grav. 2.653 t0 2-750- Chern. Char.—Entirely infufible under the action of the blow-pipe. Conjiituent Parts. Rofe. Silica, 97-5° Alumina, .25 Oxide of iron and manganefe, .50 98.25 Localities, £kc.—Amethyfl is found in Bohemia, Saxo¬ ny, Siberia, very abundant in the Uralian mountains, Hungary, and Auvergne in France. It is ufually met with in the veins of metalliferous mountains, very rarely in granitic mountains. It is frequently met with cryflal¬ lized, uining the cavities of balls of agate ; in amygda¬ loid and porphyry rocks. Ufes. When the amethyfl is cut and polifhed, it af- fumes an agreeable colour and luflre, fo that it is employ¬ ed in jewellery. Werner has divided the amethyfl into twro varieties, the common and fibrous ; the latter being chiefly.cha* rafterized by its fibrous fra£lure and refinous luflre. This latter variety too, is only found maffive. Subfpecies 2. Rock Crystal. Mountain Cryjlal, Kirw. i. 241. Le Crijlal dc roche, Brochant, i. 243. Quartz-hyalin Limpide, Hauy, ii. 417. Exter. Char.—Rock cryftal is ufually found cryftal- lized, fometimes in rounded pieces, but rarely maffive. The form of its cryftals is, 1. A fix-fided prifm, having one of its bafes cr both furmounted by a tharp pointed pyramid ; the Tides of the pyramid and prifm corref- ponding. This is its moft ufual form ; but it exhibits many apparent varieties, arifing from modifications in the magnitude of one or feveral of the faces at the ex¬ pence of the others., 2. A double fix-fided pyramid, which is fometimes perfedl, and fometimes truncated on the edges of the common bafe ; and fometimes too, three alternating faces on each pyramid are larger than the others, giving to the cryftal the appearance of a cube. 3. A fimple, very acute pyramid with fix fides, having its fummit, and often alfo its bafe, acuminated with fix faces; but this is rather an irregularity in the cryftallization than a new form. The cryflals of this mineral are fometimes very large, and they are alfo found very fmall. In the rounded pieces the external furface is rough, but in the perfedl - cryftals Parti. MINER C'.affifica- cryftals the faces of the prifm are ftriated tranfverfely •, tion. tJ10fe of the pyramids and acuminations are ftnooth. ^ " v The luftre is refplendent and vitreous ; fra^lure perfeft- ly conchotdal, fometimes, however, foliated) fragments indeterminate, very lharp edged. Colours of rock-cryflals are grayilh white, yellowifh white, pearl gray, yellowiih and biackilh brown. In¬ ternally it is fometimes iridefeent. It is tranfparent, fometimes feinitraniparent. By looking acrofs one of the faces of the pyramid, and the oppofite face of the prifm, double refra&ian is produced. Scratches glafs, and gives fparks with Heel. Somewhat frangible } fpec. grav. 2.650 to 2.888. Chem. Char.—Entirely infufible before the blow- pipe. Conjlituent Paris. Bergman, Silica 93 Alumina 6 Lime 1 A L O G Y. 163 ture perfectly conchoidal, and fragments indeterminate. Siliceous It varies between femitranlparent and tranflucent. , t The colour is fometimes milk white j but its principal colour, it is faid, is pale rofe red. In its other charac¬ ters it agrees with rock cryftal. It is fufpe&ed that this mineral is compofed of filica and oxide of manganefe, to the latter of which the co¬ lour is owing. Localities, &c.—Milk quartz forms beds in primitive mountains j at Rabenftein in Bavaria it is met with in a large grained granite. It is alfo found in Finland, Greenland, Saxony, Siberia, and the weftern part of Invernefsfhire in Scotland. XJfes.—The femitranfparence, the fine colour, and the poliih of which it is fufceptible, have introduced this mineral to be employed in jewellery. Subfpecies 4. Common Quartz. Quart-z, Kirw. i. 242. Le -Quartz commune, Broi chant, i. 248. Quartz hyalin amorphe, Haiiy, ii.4251. 100 Physical C/w.—It is fometimes phofphorefcent *, two cryftals, by being rubbed together, exhibit a little light in the dark, and give out a peculiar odour, which is fomewhat empyreumatic. Localities, &c.—Rock-cryftal is moft commonly found in veins of primitive rocks, and particularly in granite ; in drufes lining the cavities of thefe rocks. The fineft cryftals are now brought from Madagafcar, but it is a very ♦frequent mineral in moft countries, as in the mountains of Switzerland, where it w^as formerly dug out of the faces of lofty precipices by the inhabitants. It is alfo found in Bohemia, Saxony, Hungary, and in Cornwall in England, and different parts of Scotland, as in the ifland of Arran, in the cavities of the granite mountains, and in Cairngorm in Aberdeenfhire, the two latter, which are w-ell known by the name of Ar¬ ran ftones and Cairngorms, are ufually of a fmoky co¬ lour, owing, it is fuppofed, to iron or manganefe ; pro¬ bably to the latter, for from fome experiments W’hich we have made, the colour entirely difappears by expo- fing the cryftal to a ftrong heat, and from other obfer- vations it appears that the colouring matter is alfo de- ftroyed by the action of light. Rock cryftal fometimes contains fchorl, amianthus, aftynolite,mica, and titanium. Cryftals are alfo fometimes met with in cavities containing a drop of water, and a Imall quantity of air. Ufes.—Rock cryftal, on account of its luftre and tranlparency, is employed in jewellery, and particularly when it is coloured, as thofe from Cairngorm in the north of Scotland, many of which are held in high efti- mation. Subfpecies 3. Rosy Red or Milky Quartz. Rofy Red Quartz, Kirw.-i. 245. Quartz laiteux, Bro- chant, i. 246. Quartz hyalin laiteux, Haiiy, ii. 4 20. Exter. Char.—This mineral is always found mafiive. It is indeed faid by Emmerling, that it has been found cryftalhzed, in fmall fix-fided prifms, terminated by a fix-fided pyramed, at Rabenftein in Bavaria. Internally, its luftre is fhining, rarely refplendent j refinous } frac- Exter. Char.—Common quartz is found in various forms, maftive, difleminated, in grains, and rounded pieces. It is fometimes ftala&itical, globular, kidney- form, tuberculated, cellular, perforated, and corroded ; fometimes alfo it is cryftallized, and the cryltals are ei¬ ther true, or fuppofititious. The true cryftals are grouped together in reniform, rounded, or radiated maffesj the form is the fame as that of rock crylta!. The pfeudo cryftals derive their figure from the fubftan- ces on which they are formed, as the cube from fluor fpar, the octahedron from the fame, the fix-fided table from barytes, the acute fix-fided pyramid from calca¬ reous fpar. The lurface of the true cryrtals is fimilar to that of rock cryftal, but that of the pfeudo cryftals is rough, and the luftre is dull. Frafture of common quartz is Imall, conchoidal -, fometimes large, fplintery, and fometimes imperfeCtly foliated, or fibrous, with large parallel fibres. Fragments indeterminate, with lharp edges, very rarely rhomboidal. It is commonly tranllucent, rarely femitranfparent. The colour is milk white, fnow white, reddilh white, and blood and flefh red, with many lliades of thefe colours. Scratches glafs. Spec, grav 2.640 to 2.654. Chem. Char.—Infufible before the blow-pipe. Silica forms the principal conilituent part •, but among the numerous varieties of common quartz, there are no doubt flight differences in the nature and quantity of the materials which enter into its compofition. The dif¬ ferent (hades of colour are owing to different portions and different dates of metallic fubftances. Localities, &c.—Common quartz is one of the fub¬ ftances of moft frequent occurrence in all kinds of rocks, forming one of the chief component parts of primitive mountains, fometimes in entire beds, or whole mountains, as in the iflands of Ilia and Jura in Scotland. It is alfo frequent in veins, very common, in ftratiform rocks, where it conftitutes the bafe of fandftone : in alluvial rocks it is met with in rounded pieces, or in the form, of fand. Efes.—Common quartz is employed in the manufac¬ ture of glafs inftead of fand ; in the fabrication of fmalt, and as a flux for calcareous ores of iron. A variety of this, called aventurine, is fometimes held in confiderable eftirnation. It is the quartz hyalin X 2 aventurin6 164 Silicfous aventurlne of Haliy, and the natural aventurine of genus. j)e Llfle. It is of a deep red, gray, green, or black- ^ iili colour, marked with fpots fometimes of a yellowifh, and fometimes of a filvery appearance, which proceed from very thin pieces of pure quartz diffeminated in the mafs. It ought not to be confounded with quartz mix¬ ed with mica, or micaceous quartz, which is a com¬ pound rock. On the contrary, the diverfity of colours feems to be owing to numerous fiffures which are arran¬ ged nearly in the fame direftion. Aventurine in found near Vafles, in the department of Deux Sevres in France, in the form of rounded Hones, which are reddifh •, at Cape de Gates in Spain, of a whitifh colour, with filvery fpots; in Arragon, which affords feveral varieties 5 near Madrid, among rounded fragments of granite*, at Facebay in Tranfylvania, where it is of a black colour, w-ith very finall golden fpots; and in the neighbourhood of Catharineburg in Siberia. The name aventurine is derived from the following circumfiance. A workman having dropped by chance par aventure, fome brafs filings into a vitreous matter in the ftate of fufion, gave the mixture this name, of which was afterwards made vafes and other ornamental objects. Mineralogifts gave the fame name to natural fubftances which have a firiking refemblance to this artificial production. Hairy, ii. 422. Subfpecies 5. Prase. Pra/iism, Kirwn i. 249. La Prafe, Brochant, i. 252. Quartz Hyalin Vert obfeure, ii. 419. ^udrt% Prafe, Brongniart, i. 280. Exter. Char.—This mineral poffeffes all the charac¬ ters of quartz in general. It is moft commonly found maffive, and very rarely cryftallized. The cryfials, which are ufually fmall, have the form of rock cryftal. The colour is ufually leek green ; the external furface is rough and gliftening •, the internal fliining and vitreous j it is tranflucent $ the fracture imperfectly conchoidal, and fometimes coarfe fplintery ; fragments (harpe-edged. When it is mafiive, it is compofed of diftinCt concre¬ tions, which are granulated prifmatic, or cuneiform, the furface of which is rough and tranfverfely ftriated. Localities, &c.—Prafe is found at Brietenbrunn near Schwartzenberg in Saxony, in a metallic vein, accom¬ panied with magnetic pyrites, galena, blende, calca¬ reous fpar, and aftynolite. It is alfo found in Bohemia, in Finland, near lake Onega, and in Siberia* TJfes.—As it is fufceptible of a fine polifh, prafe is employed in jewellery. This mineral ought not to be confounded with quartz coloured by means of chlorite, which latter is of a brighter green, but opaque. Subfpecies 6. Ferruginous Quartz, or Iron Flint. Le Caillou Ferrugineux, Brochant, i. 248. ^uart'Z Rubigineux, Brongniart, i. 281. ^uart'Z Hyalin hema- toide, Hairy, ii. 420. Ei/enkiefelof the Germans. Exter. Char.—The peculiar character of this mineral feems to be owing to a large proportion of oxide of iron, W'hich renders it opaque. It is ufually found maffive, but it fometimes alfo affumes a cryftalline form, which is a prifm with fix equal fides, acuminated at each extremity with three planes. The colour is of a Part I. yellowifh browm, fometimes of a brownifh red, and of Claffifica- a bright blood red. It is ufually opaque, or only tranf- tl0n- parent at the edges. External luflre refplendent ; inter- r~'' nal finning and vitreous. Fradlure imperfedlly conchoi¬ dal •, fragments angular, but not very fliarp-edged. Concretions {mall-grained and diftindl. It is harder than common jafper. Not very brittle. Localities.—This mineral is found in veins of ironflone in Saxony, and in England, where it is accompanied with fulphate of barytes. Ferruginous quartz is difiinguifhed from jafper, to the red variety of winch it has a ftriking refemblance, by its {Inning fracture, which is alfo vitreous and con¬ choidal 5 its property of cryftallizing 5 and according to Brongniart, by having no alumina in its compo- fition, which he properly confiders as an effential charac- teriffic. 28. Species. Hornstone. Ilornjlone, Kirw. i. 303. La Pierre de Come, Bre~ chant, i. 254. Petrojilex, Haiiy, iv. 385. This mineral is met with in maffes and alfo in rounded balls. The colour is ufually gray •, it is tranflucent at the edges, the frafture fplintery or conchoidal •, it has little luffre ; is fc hard as to fcratch glafs, and give fire with fieel; and its {pec. grav. is from 2.699 to 2.708. The diverfity of fradlure which has been obferved in hornfione, has led to the fubdivifion of this fpecies into three fubfpecies, viz. fplintery hornfione, conchoidal hernftone, and wmodftone. Subfpecies 1. Splintery Hornstone. Hornfione Ecailleux, Brochant, ,i. 255. Retroflex Syuamofus, Wallerius, i. 280. Exter. CZar.—This mineral is found mafiive, or in rounded pieces. It has fcarcely any lufire ; the frac¬ ture is fine, fplintery j fragments fharp-edged j tranf¬ lucent at the edges. It is fcarcely io hard as quartz *, it is brittle. The colour is bluifir gray, fmoke and pearl gray, fometimes greenifh and yellowifh gray, more rarely olive and mountain green. Sometimes there is a mix¬ ture of thefe colours, arranged in fpots and ftripes. Spec. grav. 2.654. Kirwn Chem. Char.—According to fome mineralogifts, this variety of hornftone is fufible before the blow-pipe, but according to others it is infufible without the addition of borax. The following are the conftituent parts of a horn- flone analyzed by Kirw’an. Silica 7 2 Alumina 22 Carbonate of Lime 6 100 Localities, &c.—This variety of hornftone is chiefly " found in veins in primitive mountains. It is alfo found in rounded pieces in alluvial rocks, and it conftitutes the chief bafis of hornftone porphyry, as at Dannemora and Garpenberg in Sweden. It is met with in veins at Freyberg, Schneeberg, Johann-Georgenftadt, and Gerf- dorf in Saxony. MINERALOG Y. Subfpecies Part T. MINER Claffiflca- Sahfpecies 2. CoNCHOfBAL HORNSTONE. ‘ t‘>on- Petr oft/ex Eouabilis, Wallerius i. 281. Le Hornjleln Conchoide, Brochant, i. 258. Exter. Char.—This mineral is always found maflive, and feems to approach in its characters very nearly to the preceding variety or fubfpecies, excepting in the fradture. which is perfectly conchoidal. Localities, &c.—-This fubfpecies is found in beds and veins, when it is fometimes accompanied with agate. . It has been found accompanying gneis at Goldberg in Saxony, and fine fpecimens of both fubfpecies ar^ met with in the ifland of Rona near Sky in Scotland, where it feems to forru a confiderab’e vein, traverfing a gneis rock. Subfpecies 3. W00DSTONE, or Petrified Wood. Woodfione, Kirw. i. 215. Le Hol%Jlt-in, Brochant i. 259. ^uartes, Agathe Hy/oide, Hauy, ii. 43.9. This fubfpecies poffeiTes more diilinCtive characters than the former ; and as it feems to be wood, retaining its original texture, converted into hornftone by fome petrifying procefs, it is ufually found in infulated malTes, or in rounded pieces. It has the external appearance of wood, for the furface is rough and uneven, or lon¬ gitudinally flriated-, internally it is gliftening, but fome¬ times dull, having a vitreous luftre. The fraCture molt frequently exhibits the fibrous texture of the wood. The crofs fraCture is fometimes fplintery or imperfeCtly conchoidal. The fragments are indeterminate, and {light¬ ly fharp-edged. The moft common colour is dark gray, afh gray, grayifh, white, and fometiraes cochineal and blood red. Different colours appear in the fame mineral, forming fpots, clouds, or ftripes. It is com¬ monly tranflucent at the edges, fometimes entirely tranf- lucent, and fometimes opaque. It is hard and brittle. Localities.—Woodftone is met with in Bohemia, Saxony, and Siberia, and on the banks of Loch Neagh in the north of Ireland, particularly, as we have been informed, near places where fome of the rivers difeharge their waters into the lake. Ufes.—This mineral is generally fufceptible~of a fine polifli, and is therefore employed in jewellery. 29. Species. Flinty Slate, or Siliceous Schijlut. This fpecies is divided into two fubfpecies or varieties, viz. common filiceous fchiilus, and Lydian ftone. Subfpecies 1. Common Siliceous Schistus. *» Siliceous fchijhis, Kirw. i. 306. Schijle Jilicisux commun, Brochant, i. 283. Exter. Char.—This mineral is found in maffes or rounded pieces, and it is frequently tranfverfed by veins of quartz of a grayifh white, or coloured red by means of iron. This, it is faid, is a diftinguifhing charac- terilfic of filiceous fchiflus rvhich it rarely wants (Bro¬ chant). Internally it is dull, very rarely a little glim¬ mering. The fraClnre in the fmall is compaft, fome¬ times fplintery, and fometimes imperfedly conchoidal ; but in the great or large maffes it is flaty, a charader which almoft always difappears in the fmall fragments. The fragments are fliarp edged. The colour is blackifli, greenifh, or fmoke gray. It is commonly opaque, rarely tranflucent at the edges. It is hard and brittle. A L O G Y. 165' Chetn. Char.—Before the blow-pipe, gray filiceotw Siliceous fchiflus becomes white and friable ; the black affumes a %er‘uc' , darker colour, and is a little vitrified at the edges, Conjlituent Parts. Wiegleb. Silica 75 Magnefia 4.58 Lime 10. Iron 3.54 Inflammable matters 5.02 Lofs 1.86 100.00 Localities, &c.—Siliceous fchiflus is met with in Bo- henna, Saxony, Switzerland, and Siberia ; at Leadhills in Scotland, and alfo at Carlops, near the termination of the great coal field to the fouth of Edinburgh- The geological pofition of this flone is not pre- cifely determined. In Scotland it is conneded with thofe rocks u'hich come under the denomination of tran- fition rocks; but according to different deferiptions it feems to have been confounded with argillaceous fchif- tus, with which indeed it poffeffes fome common pro¬ perties ; and fome mineralogifls regard it as an argil¬ laceous fchiflus, having a larger proportion of filiceous earth. In fupport of this opinion, filiceous fchiftus has been found in iituations where it is fubordinate to argil¬ laceous fchiflus. Subfpecies 2. Lydian stone. Bafanite, Kirw. i. 307. La Pierrede Lydie, Brochant, i. 286. Roche Corneenne, Hauy, iv. 434. This flone, which is of a grayifh, bluifh, or velvet black, is found in maffes, and in rounded pieces of a trapezoidal form, which are alfo traverfed with veins of whitifn quartz. The external furface is fmooth and weakly fhining ; the internal is glimmering. The frac¬ ture is even, fometimes flightly conchoidal or uneven, rarely fplintery j in large maffes it is flaty. The frag¬ ments are fharp-edged, and fometimes affume a cubical form. It is commonly opaque, and rarely tranflucent at the edges. It is fcratched by quartz 5 brittle. Spec, grav. 2.415 to 2.880. Localities.—Lydian flone is found in fimilar places with the former variety. LJfes.—This ftone has been long known under the name of Louchjlore, becaufe it is employed to afeertain the purity of gold. From this ufe it obtained the name of /Sckmvos or the trier, and it was called Lydian ftone,. becaufe it was found in Lydia. When it is employed as a touchftone, the gold to be tried is rubbed on its polifhed furface j on the metallic trace which remains nitric acid is poured, and the quantity of alloy is judged of by the degree of change which takes place, this being compared with traces made and treated in the fame way with needles differently alloyed and prepared for the purpofe. This teft, it is to be obferved, is not perfeflly accurate, but is fufficiently fo for thofe who are much employed in the ufe of it. The property which renders this mineral fit for the above purpofe de¬ pends on its degree of hardnefs, while it prefents at the fame time a fmooth and even fradlure without being per- feflly fmooth. Other Hones poffefling fimilar proper¬ ties,.. 165 MINE R ♦ Siliceous fuch as fcveral varieties of bafalt, are conveniently , S^IH- employed for the fame purpofe. 30. Species. Flint. Flint, Kirw. i. 3c T. Pierre a fujil, Brochant, i. 263. ^uart%-Agathe Pyromaque, Hauy, ii. 427. Exter, Char,—Flint is found maflive, difleminated, in angular fragments, in globular rnaffes, tuberculated, and perforated. The furface is fometimes rough, fometimes uneven, and fometimas fmooth. The white cruft with which it is often covered, is confidered by fome mineralogies as an incipient decompolition. The external luftre is dull or a little glimmering $ the inter¬ nal is weakly Alining ; the fra&ure is perfectly conchoi- dal, the fragments (harp edged. The colour is ufually gray, fraoke gray, fometimes perfectly black. Various colours appear in the fame mineral, prefenting fpots, Itripes, and clouds. Commonly tranflucent at the edges j fcratches quartz : fpec. grav. 2.to 2.99. Chem, Cvfor.—-Entirely infulible before the blow¬ pipe. Silica Lime Alumina Oxide of iron Conjiituent Parts. KJaproth. 98. .50 '251 .253 99.00 Vauquelin. 97 98 Phi/Jical Char.—Two pieces of flint nibbed together in the dark, give out, like quartz, a phofphoric light. Localities, &c.—Flint is never found in primitive mountains, excepting in very fmail quantity, and very rarely, in fome veins 5 in alluvial rocks it is fometimes met with in rounded pieces; but it is moft abundant in Gratified mountains, particularly in beds of limeftone, marl and chalk, in which it is difpofed in parallel layers. It is met with in Saxony, Denmark, Sweden, Poland, and Spain, and is very abundant in chalk beds in the north of France, and alfo in different parts of England. It is alfo met with diftributed in layers in the white lirneftone rocks, on the north coaft of Ireland. In the department of Jura in France, globular maffes of flint have been found with cavities containing fulphur. The Angular geological relations of this mineral have greatly puzzled nRturalifts, who are fond of fuch fpe- culations, and are never fatisfied till they have accounted for every thing, however fcanty and defeftive the data Formation may be on which their hypothefes are formed. It is •f flints, on this account that the theories which have been pro- jpofed, to explain the formation of flint, offer nothing more than the fillieft and mofl: groundlefs conjedfures ; and indeed the fame remark is equally applicable to theories of the earth in general. It has been already obferved that flint is regularly difpofed in layers, in the beds of chalk or limeftone in which it is found. In an infulated mafs of white limeftone near Port Ruffi on the north coaft of Ireland, which we had an opportunity of examining, the balls of flint were difpofed in this way with great regularity. When the* bed of lime¬ ftone is of no great thicknefs, it contains only one layer of flints, but in thicker beds there are two layers of A L O G y. Parti, flints, the one near the top, and the other near the bot- Claflifica- tom of the bed. Thofe layers of flint, too, it is to be tl0i,< obferved, have exactly the fame inclination as the ftrata of lirneftone. According to one fet of theorifts, the^yfae, flint being in a ftate of fuflon, was ejected from the bowels of the earth, and depofited in the places where it is now found. ’Pais opinion carries along with it its own abfurdiry •, for admitting that the flinty matter has been in a ftate of fuflon, it is impoflible to fuppofe that it could be depoflted with fo much uniformity and re- gularity, by being projected according to the conjee-, ture ot the philofophers who maintain this opinion. Had th;s been the mode of its formation, maides of flint would have been found throughout etvery part of the chalk or limeftone beds, and not in regular layers, as is really the cafe. 2l According to another opinion, by which the forma-by water, tion of flint is propofed to be accounted for, cavities were produced, while the chalk and limeftone were yet in a foft ftate, in confequence of the air extricated during the evaporation of the water^and the flinty mat¬ ter in folutipn was introduced into thefe cavities by in¬ filtration from above. But the fame argument is equally forcible againft this opinion. It is impoflible to con¬ ceive that the cavities could be fo regularly and uni¬ formly produced by the extrication of the air. They / would have been found through every part of the beds of chalk and limeftone where flint is met with. And befides, even allowing that this flinty matter was held in folution by water, it might naturally be afked, why the greateft proportion of it was not depofited near the furface, when it firft came in contact with the chalk or limeftone', rather than to have continued to pafs through the different beds, and form maffes of folid flints at the greateft depths, in as great quantity as near the furface. ^ A third opinion, which fome imagine to be lefs im-by marine probable than either of the former, fuppofes that flints animals, have been entirely produced by marine animals depofited during the formation of the ftrata in which they are contained. This opinion feems to derive fome fupport from the remains of marine animals, which are not un- frequently found included in nodules of flint. It is no rare occurrence to meet with {hells thus attached to thefe nodules, and converted into flinty matter, but at the fame time retaining their original form and appear¬ ance in the moft perfeeft manner. Efes.—The extenfive ufe of this mineral, in confe¬ quence of its property of ftriking fire with fteel, as gun flints, is well known. Flints are employed alfo as a fubftitute for quartz in the manufadfture of glafs and porcelain, and in the fabrication of fmalt. The coarfer kinds, or fuch as are perforated and ca¬ rious, are applied to the purpofes of building and milftones. Sometime: the colours and the polfth of flint are fo fine as to have brought it into ufe in jewellery. As flints are found in greateft abundance in France Manufac- ar»d England, the principal manufadfures of gun flintsture olfgrm are carried on in thefe countries. A particular account of this manufacture in France has been given by Do- lomieu and Salivet, °jour. des Mines, N* 33, pp. 693 and 713. The whole procefs, which according to the defeription of Dolomieu is divided into four ftages, is very fimple. I. After having fixed upon a mafs of ftone fit for Part I. M I N E U Claflifica- for tlic purpofe, tlic lirft part of the operation is to break tion. t}ie ftone into pieces of convenient fize. With this ' v view the workman, feated on the ground, places the {tone on his left thigh, and ftrikes it with finall ftrokes, to divide it into pieces of a pound or a pound and a half weight, having large furfaces and fmooth'fraftures, and at the fame time he avoids fplitting or {baking the ilone by too feeble or too violent flrokes. 2. In the next part of the operation the niceft management and dexterity of hand are required *, for by repeated ftrokes fplinters of the proper fize to form gun flints are detached*, one is feparated at every ftroke. During this operation he holds the mafs of {tone in his left hand. The fplinters are about l^- inch broad, l\ long, and two lines thick in the middle. They are {lightly convex above, and concave below j thick at one edge, and thin at the oppofite edge. 3. The flint is brought to a regular ftiape during this part of the operation j and, 4. The edge of the gun flint which ftrikes fire, is brought to a ftraight line by placing it on a (harp iron inftrument, and giving it five or fix fmall ftrokes with a circular hammer (roulette). This finilhes the opera¬ tion, and the whole time of making a flint is not equal to a minute. With maffes of ftone that work eafily, an expert workman will prepare 1000 good fplinters in a day. It requires another day to bring to the proper fhape 500 ; fo that in three days he can fplit off from the mafs and completely finifti loco gun flints. 31. Species. Calcedony. This fpecies has been divided into two fubfpecies or varieties; common calcedony and carnelian. Subfpecies 1. Common Calcedony. Id. Kirw. i. 298. La Calcedoine Commune, Brochant, i. 268. Quartz Agathe Ca/cedoine, Hairy, ii. 425. Exter. Char.—This mineral is found maffive, in rounded pieces, which are globular, reniform, botryoi- dal, ftalaclitical, cellular 5 and fometimes alfo it is cry- ftallized in the form of a cube, rhomboid, a Ample py¬ ramid with three and fix faces •, but thefe are fuppofed to be p{eudo cryftals, or merely a cruft of calcedony on the cryftals of other fubftances. The external furface is moft commonly uneven, fometimes rough, and rarely fmooth. External luftre is accidental: internal p-fim- mering, rarely a little ftnnmg j fradfure even, fome¬ times imperfedlly conchoidal or fplintery *, fragments {harp-edged. Colour white, grayilh or bluifh white, yellowifti or blackith : various colours appear in foots, clouds, ftripes, and veins. Sometimes when it is cut it is iridefeent *, commonly tranflucent, rarely femitranfparent. Harder than flint. Brittle. Spec. grav. 2.600 to 2.700. Chem. Char—Before the blow-pipe it is infufible. Conjiituent Parts. Bergman. Silica 84 Alumina 16 A trace of iron — A. L O G Y. 167 Localities, &c.——Calcedony is moft ufually met ft'ith Siliceous in globular maffes in amygdaloid, as at Oberftein, in genus* the duchy of Deux Fonts. It is found alfo in Saxony, 'w,"~v "" I' Silefia, and Siberia, in Iceland and the Faro iflands j in the north of Ireland 5 and in feveral of the weftern iflands of Scotland. The cavities of the balls of calce¬ dony are often lined with cryftals of quartz and ame- thyft. f^j-.-yCalcedony takes a fine polifti, and is therefore employed in jewellery. 2. Subfpecies. Carnelian. Ld. Kirw. i. 300. La Cornaline, Brochant, i. 272. ^uart%-Agathe Cornaline, Haiiy, ii. 425. This mineral is found in maffes, or diffeminated, but moft frequently in rounded pieces of a globular, kidney form, or ftalaftitical ftiape. External furface rough and uneven ; internal luftre glimmering, or {lightly {Inning p fra&ure perfe&ly conchoidal j fragments very {harp- edged ; moft common colour blood red of various ftiades, and fometimes reddifh brown or wax and honey yel¬ low ; femitranfparent, hard, and brittle. Spec. grav. 2*59 to 2.73. Chem. Char.—Carnelian is jnfufible before the blow¬ pipe, but lofes its colour, and becomes white. Localities, &c.—Carnelian is found in fimilar cir- cumftances, and in fimilar places with common calce¬ dony, but is of lefs frequent occurrence. The fineft earnelians are brought from the eaft, and thence they are denominated oriental. IJfes.—The carnelian is employed for the fame pur- poles as common calcedony. Obfervattons on Agate.—As common calcedony and carneiian, along with jafper, conftitute the bafe of the greater number of agates, it may be here proper to in¬ troduce a few remarks on the mineral fubftances which are included under this name, and on the theories of their formation. The term agate is of very general application, com-Varieties prehending numerous varieties, which are chiefly diftin-of aSatei guifhed by the arrangement and difpofition of the co¬ lours with which they are marked, and from which they have derived particular names. The following are fome of the principal varieties of agate. 1. Fortification agate, in which the different coloured ftripes aie ar¬ ranged in a zigzag manner, prefenting fomething of the appearance of a fortified town. 2. Lavdfcape agate, in which the colours and ftiades are fo arranged as to exhibit the appearance of a landfcape. 3. Band or ribbon agate, in which the various colours are difpofed in ftripes or zones, which are ufually in ftraight lines,, but fometimes concentric. To this variety of agate, when the zones or ftripes are arranged parallel to each other, and diftin&ly marked, the name of onyx was gi¬ ven by the ancients. The name onyx, which fignifies the nail of the finger, is derived from the whitifti co¬ lour refembling that part of the body. They alfo gave the name offarde to a variety of the fame ftone, of a flefti colour, and afterwards the compound mmt fardo- nyx was given to another variety, in which a whitiih layer of the onyx, having fome degree of transparency, covered another layer tof a fle fti red, the colour of which latter appeared through the former in the fame manner as the colour of the flefti appears through the nail. But IOO i68 MINE R Siliceous in tne end, the name of onyx feems to have been ap- , , plied to all {tones formed of layers of different colours. 4. MqfS' agate. In home varieties of agate filaments of a greenilh or other colour, having the appearance of fome fpecies o{ confervae or mufci, are obferved, and thefe have been denominated mofs agates. Some have fuppofed that thefe filaments have been real moffes or confervae, enveloped by the liliceous matter. In fome alio delineations of a brown or black colour^ exhibit the appearance of trees or ftnubs. This dendritical ap¬ pearance is afcribed by fome to the infiltration of iron or manganefe into the natural fiffures of the ftone. The fined: agates of this variety, it is faid, are brought from Arabia, by the way of Mocha, on the coaft of the Red fea ; and hence they are known by the name of Mocha Jlones. Befide thefe varieties, there are feveral others, as tubular agate, when it is compofed of calcedony, which feems to have been in the form of ftalaftites, and afterwards filled up with a different mineral fubliance, or at leaf! of a different colour •, clouded agate, pre- fenting the appearance of clouds *, radiated ox Jle/lated, when the different colours are arranged in rays ; breccia agate, compofed of fragments of different kinds of agate, and cemented together by filiceous matter, and confti- tuting a real breccia ; fpolted agate, when the colours are difpofed in points or fpots; petrified agate, w'hich feems to have been wood penetrated with the matter of agate j coral agate, having the appearance of coralloid j jafper agate, in which the predominant part of its com- pofition is jafper. Formation The formation of agate has been the fubjeft of much ,©f agate, controverfy among contending theorifts ; for while one party conceives that it affords the ftrongeft proofs of being produced by means of heat, or from a ifate of fu- fion, another party feems to be equally convinced that it fupplies them with the moft certain evidence of hav- 25 ing been formed from an aqueous folution. by fulion, Befide other ftrong obje&ions that might be urged a- gainft the opinion of agate being formed from a date of fufion, the uniformity and regularity in the arrangement of the different kinds of matter of which it is compofed, feem quite hoftile to it, and, excepting to thofe who are previoufly prepoffeffed with fuch an opinion, will, we prefume, appear altogether infurmountable ; for it is in¬ conceivable, that in a mafs of melted matter, whether it have been in a ftate of fufion in the place where it is now found, or projefted from the bowels of the earth into the ftrata which are now its repofitory, while in a foft ftate, could arrange itfelf into layers, fome of them often extremely thin, and difpofed in ftripes, concentric circles, fpots, while thefe various kinds of matter exhi¬ bit very flight {hades of difference in their conftituent parts. It cannot even be imagined that all this could have been effe&ed, even by the floweft and moft gra- dual procefs of cooling. by aqueous In accounting for the formation of agate by folution infiltration, in water, it is faid that the cavities in the rocks which contain agate, were formed in confequence of the evo¬ lution and extrication of air, while thofe rocks wrere in a ftate of foftnefs $ and that the matter of which agate is compofed, was introduced in the ftate of an aqueous folution by means of infiltration. But obje&ions, equal¬ ly infurmountable, might eafily be adduced againft this theory 5 and one of the firft that prefents itfelf is de¬ rived from the diverfity of matter depofited in xnaffes of 2 A L O G Y. Part I. agate. This objedHon, indeed, is attempted to be ob- Claffiffca- viated by fuppofing that the agate compofed of different ,;‘on• , kinds of matter was derived from different kinds of fuc- v ceflive folutions : but this is only removing the diffi¬ culty a ftep fartlier ; for, can it eafily be conceived, that a very thin layer of one kind of matter being depofited, and this, let it be fuppofed, of a white colour, the folu¬ tion was changed, from which proceeded another thin layer ; that the folution was again changed, and depo¬ fited a third kind of matter •, and after another change, a fourth kind, or perhaps that the depofition of the firft kind of matter again commenced^ But if infiltration from an aqueous folution have really been the mode of formation of this mineral, how comes it, it may be fairly afked, that the depofitions from the different kinds of folution have not been arranged, at leaft in the larger cavities, in ftrata or zones parallel to the horizon j be* caufe it feems natural to fuppofe that the depofition of ftony matter, from a ftate of folution in water, would be influenced by gravitation, and thus be horizontally arranged ? We are awTare, indeed, of an objection which may be made to this obfervation. It will be faid, that the influence of gravity has in this cafe been counteracted by the aClion of affinity between the ftony matter in folution, and the fides of the cavity in which the agate is formed ; but whatever effeCt this might have in the fmaller cavities, its influence would be di- minilhed in thofe of larger capacity. To what wre have now faid on this fubjeCf, which, it muft be acknowledged, is more curious than ufeful, we fl .’l only add a circumftance which, fo far as we know, has not been noticed by geologifts; but it feems to be of confiderable importance in the eftabliihment or fub- verlion of the theory of the formation of agate by means of infiltration in the ftate of aqueous folution. It wall be allowed, we prefume, that all agates found in the fame horizontal pofition, or at the fame depth from the furface, from which the aqueous folution is under- ftood to have proceeded, were formed from the fame fo¬ lutions ; at leaft thofe agates which are contiguous to each other, that is, within the fpace of a few yards, or even of a Angle yard. Now, if this be admitted, all the agates which have derived their materials from the fame folutions, ought to be exaClly of the fame kind, becaufe their origin is cotemporaneous, and it is derived from the fame folutions. To afcertain this point with precifion, it will be neceflary to examine agates in their native repofitories ; and although we fhall not pretend confidently to decide the queftion, becaufe our obferva- tions with this view have not been fufficiently varied and extenfive, yet w^e ftrongly fufpeft, that it will ap¬ pear, from future inveftigations, that agates, and even fuch as are almoft contiguous to each other, have been formed of very different materials, or of fimilar mate¬ rials arranged in a very different manner. To thofe wTho are fond of fuch fpeculations we recommend this as a fubieft of inveftigation. Localities—'Agates are found in great abundance in different parts of the world. They are fometimes di- ftributed indiferiminately with the rocks which contain them, fometimes in beds or layers, in interrupted maffes, and fometimes in thin beds, where there is fcarcely any interruption of continuity. This laft mode of arrange¬ ment, however, is rare. Aga’-es are fometimes found in metallic veins, or are mixed with metallic fubftances, as Part T. MINERALOGY. 169 Ciaffifica- tlon> #• An. du Mufeum b'Hijl. Nat. ill- 53- a5) the fulphurets of lead and filver. It would appear, too, that agates alfo exift in primitive rocks. Sauf- fure has obferved them in granite, containing no¬ dules of the fame granite, and penetrated with iron py¬ rites. He has obferved alfo at the fame place, near Vienne, in the department of Ifere, thin layers of cal- cedony alternating with gneis ; but porphyries and fimilar rocks are the ufual repofitories of agate. Thefe Hones are found in great variety and abundance at Oberflein, in the department of Mont-Tonerre, in France, in a rock of amygdaloid of a peculiar nature, and full of cavities of all lizes. This rock is confidered by Dolomieu as a volcanic tufa ; but according toother mineralogifts, and particularly Faujas de St Fond, who has given a minute defcription of it *, it is conlidered as a porphyry or amygdaloid, with a balls of trap, which is very fubiedl to decompolition. The globular maffes of agate are difpofed in this rock without any or¬ der, and are ufualjy enveloped with a peculiar greenilh earth, but which contains no copper. In the geodes of agate found at Oberllein, jafper, amethyfl, carbonate of lime in cryllals, chabafie, a fpecies of zeolite, and fome por¬ tion of titanium, have been obferved ; but not the lead trace of any organized body. Digging, polifhing, and forming into a great variety of ornamental pbjedds, con- iiitute the chief employment of the inhabitants of Ober- itein. Agates are found in abundance in different parts of Scotland : but the larged and fined are met with in the neighbourhood of Montrofe and Stonehaven ; in the rocks near Dunbar on the ead coal!, and in the rocks about Dunure, on the (bore of Carrick in Ayrlhire. 32. Species. Hyalite. Id. Kirw. i, 296. Muller’1 s glafs of the Germans. La¬ va glafs of many. Eider. Char.—This fubdance is found in grains or maffes, or in thin layers on other minerals. It has much the appearance of gum, and is ufually cracked. The ludre is finning and vitreous; fracture conchoidal, fometimes foliated ; fragments diarp edged. Colour grayilh white or yellowifh \ and, according to Kirwan, pure white. Tranflucent, fometimes femi- tranfparent- •, has confiderable hardnefs, and is brittle. Spec. grav. 2.11 o. Chem. Char. Infufible at x 50° Wedgwood, but melts with foda. Corjlituent Parts. Silica 57 Alumina 18 Lime 15 With fome traces of iron Localities, &c. Hyalite is found in rocks of amyg¬ daloid, or vvacken, near Franckfort on the Maine. 33. Species. Opal. This fpecies is divided into four fubfpecies or varie¬ ties. Subfpecies 1. Precfri'as Opal. Opal, Kirw. i. 289. Il’Ohale Noble, Brochant, i. 341. ^uarrz-refinite Opalin, Hauy, ii. 434. VOL. XIV. Part I. ■ ' Exter. Char.—This mineral is found maffive or diffe- Siliceous minated, and fometimes in veins; internal ludre fplen- Senns* dent and vitreous ; fiabture perfectly conchoidal } frag- d" ' -‘ ments {harp-edged. Colour milk-white, clear or pale, and fometimes bluifii gray 5 and by holding it in different lights, a very bright and varied play of colours, the principal of which are golden yellow, fcarlet red, bright blue, green and gray, is feen. It is commonly tranflucent, rarely femitranf- parent ; pretty hard and brittle. Spec, grav, 2. 114. Chem. Char.—The precious opal treated with the blow-pipe fplits and cracks, and lofes its tranfparency, but is not melted. Conjlituent Parts. Klaproth. Silica, 90 Water, 10 IOO Localities. The fined opals are found at Czerwenitza not far from Cafchau in Upper Hungary, in an argilla¬ ceous decompofed porphyry, which according to fome mineralogids is a gray done (graudein of the Germans), and are difpofed in veins, neds, and grains. When the opal adheres in frnall particles clofely together in the done, it forms what is called mother of opal. It is found in the fame manner in a kind of breccia of this decompofed porphyry. (Townfon’s Travels in Hun¬ gary, p. 307.) It is found alfo at Eeibendock, Johann- Georgendadt, and Frcyberg in Saxony. At this latter place the repoiitory of the opal is porphyry. The opal alfo is met wbth in Iceland. The opal mines defcribed by Dr Townfon are fituat- ed in a hill of fome miles in extent not far fr®m the village of Czerwenitza. This hill has been opened in feveral places, but in three with the greated fuccefs. Guards are placed upon it to prevent any perfon from digging this precious done; for as it is fituated in part of the royal domain, the peafants who were formerlv permitted to fearch for it on their own account are now prohibited by the emperor. But even at the time Dr Townfon vifited the mines the work had been difconti- nued for three or four years as unprofitable. The ufual mode of condu&ing the operations in fearching for the opal is by quarrying to the depth of three or four yards, rarely deeper. The rock is thus thrown out, broken to pieces, and afterwards examined. In one place the fearch had been made by mining •, but the gallery was only a few yards in length. From this account it ap¬ pears that the rock containing the opal lies near the furface, and feldom, it is faid, extends deeper than a few fathoms. The opals denominated oriental by the lapidaries, a term expreffive of their value rather than of their origin, are fuppofed to be from thefe mines, in which, according to records ftill in exiftence, 300 men were employed not lefs than 400 years ago. Ufes. On account of the fine play of colours, the opal is held in great eftimation for the purpofes of jewellery, and the opals which reflect green colours in moft abundance are moff highly valued. The fineft opals are called oriental; but this epithet is given by the lapidaries to the more perfect precious Hones, and is not to be underftood as denoting that they have been brought from eaftern countries. Y The i 7^ Siliceous genus. MINE R The ancients, it would appear from the account of Pliny, attached an immenfe value to this Pone 5 for he informs us that a fenator called Nonius rather fubmit- ted to banifliment than give up an opal which he had in his pcffefTion to Mark Anthony. This opal was ef- timated at 20,000 fefterces. Lib. xxxvii. cap. 6. Subfpecies 2. Common Opal. Semi opal, Kirwan i. 290. DOpale Commune, Bro chant i. 344. Quartz rejinite Hydrophone et Quartz rejinite Girafol, Hauy ii. 433. Extcr. Char.—Common opal is found'in mafles, or diffeminated, fometimes in rounded or angular pieces, and fometimes kidney-lhaped or botryoidal. Internal ludre fplendent, and intermediate between vitreous and refinous. Frafture conchoidal, but fometimes uneven. Fragments fliarp edged. Colour milk white, and varieties of this colour held in certain directions appear of a wine yellow'. The other lhades of colour are yellowiih or reddifh white, and wTax or honey yellow'. Semitranfparent and fometimes tranf- parent. Specific gravity from 1.958 to 2.015. In other characters the fame as the precious opal. Chem. Char.—Infufible before the blow-pipe, but melts with borax, and without fwelling up. Conjlituent Parts. Klaproth. From Kozemutz. Silica 98.75 Alumina 0.10 Oxide of iron 0.10 Lofs 1.05 100.00 From Telkobanya. Silica 93-5° Oxide of iron 1.00 Water 5.00 Lofs *. 100.00 Localities, &c. The common opal is found in veins, chiefly in amygdaloid rocks, and fometimes alfo, it is faid, in granites and porphyries. It is of molt frequent occurrence in Bohemiaj in Saxony, as at Freyberg, Ei- benflock, &.c.; in Hungary, in Poland, in Scotland, and the Faroe ifl inds. The amygdaloid rocks in the vici¬ nity of the Giants Caufeway in the north of Ireland al¬ fo afford a repofitory for this mineral. JJfes.—It is employed as well as the former for the purpofes of jewellery, but is efteemed of inferior value. It has been obferved of fome varieties of common ppal that they are hydrophanous, that is, they poffefs the property of becoming tranfpavent when immerfed in water, a property which it is fuppofed depends on the abforption of the water in the pores of the opal. When fimilar varieties of opal are dipped in melted wax, they are impregnated with it, and become in like manner tranfparent, but on cooling resume tb:Ir opaci¬ ty. To fuch varieties De Born has given the name of Pyrophane. Subfpecies 3. Semi-opal. Id. Kirwan i. 290. La Demi-opa/e, Brochant 5. 3 47- Quartz Rejinite Commune, et Menilite, Hauy »• 433- Exter. Char.—This mineral is found in maffes or diffeminated, in angular fragments, ftalaClitical, botry- A L O G Y. Part I. oidal, or in fuperficial layers. Luflre glimmering or Claffifka- fhining, and intermediate between vitreous and refi- bon. nous. FraCfure conchoidal, and frequently even. Frag- ’—v—— ments fharp edged. Colours extremely various, but in general duller and lefs vivid than common opal. The moft predominant are yellowifh, grayifh and reddifh white, more rarely milk w'hite. Various colours are fometimes difpofed in fpots, ftripes, and clouds. Tranflucent at the edges, and fometimes, but rarely, femitranfparent. Pretty hard and brittle. Spec. grav. 2.540. Chem. Char.—Infufible before the blow-pipe, but melts w'ith borax and without frothing up. Conjlituent Parts. Klaproth. Silica 43.50 Oxide of iron 47.00 Water 7*5° Lofs 2.00 100.op Localities, &c. The femi-opal is found in the fame places and in fimilar rocks with the common opal, as in bafalt and amygdaloid, but chiefly in granite and porphyry, and particularly in the veins of fuch rocks containing filver. Some varieties of pitch ftone have been ranked with femi-opal by mineralogifls and menilite, a mineral to be afterwards defcribed, has been alfo confidered mere¬ ly as a variety of it. Subfpecies 4. Wood Opal. Ligniform Opal, Kirwan i. 295. Opale Ligniformet Brochant i. 350. Quartz rejinite Xyloide, Hauy ii. 439‘ Exter. Char.—This variety of opal is found in maffes of different fizes, retaining the form and texture of the wood which is fuppofed to be penetrated with the ftony opaline matter, Luftre internally weakly mining, between vitreous and refinous. Tranfverfe frafture conchoidal, longitudinal frafture fhows the woody tex¬ ture. Fragments fharp-edged. Colours grayifh and yellowifh white, yellowifh brown and ochre yellow. Different colours are fometimes ar¬ ranged in concentric circles, in fpots, atjd ilripes. Often opake, but rarely tranflucent except at the edges. In¬ termediate between hard and femi-hard. Brittle. Spec, grav. 2.600. Localities, &c. The wood opal is found at Pornick near Schemnitz in Hungary, and at Telkobanya in the fame country. 34. Species. Menilite. Pitchjlone, Kirwan i. 292. Variety of flint of fbme, and Semi opal of Klaproth. Exter. Char.-fYhis mineral is found in tuberofe maf¬ fes, which have a fmooth ribbed furface, and are fome¬ times covered with a w'hitifh cruft. Internal luflre weakly ihining. Tranfverfe fra£lure flat, conchoidal •, lon¬ gitudinal, coarfe, fplintery. Fragments fharp edged. Chefnut brown colour, and marked with alternating ftripes of pearl gray and reddifli brown. Tranflucent. Pretty hard and brittle. Spec.gr. 2.185. Confituent M I N E H Conjlituent Parts. Klaproth. Silica ^ 85.50 Alumina 1 • Oxide of-iron .50 Lime -5° Water and carbonaceous matter 11.50 Lofs 1 • 100.00 Localities, &C. This mineral is found at Menil- Montant, from which it derives its name, near Paris, in nodules difpofed in interrupted {trata, in the middle of a foliated, argillaceous fchiltus, which is interpofed between the beds of gypfum. 35. Species. Jasper. Jafper has been divided into fix fubfpecies, 1. Egyp¬ tian ; 2. Striped 5 3. Porcelain ; 4. Common j 5. Agate, and 6. Opal. Subfpecies 1. Egyptian Jasper. Egyptian Pebble, Kirwan i. 312. Le Jafpe Egyptian, Brochant i. 332. Exter. Char.—This variety of jafper is found in rounded pieces, which are generally fpherical, and have a rough furface. External luftre glimmering or weakly ihining ; internal weakly fhining. Fra&ure per¬ fect conchoidal; fragments lharp-edged. The colours of this variety are difpofed in zones or irregular ftripes, which are nearly concentric. Thefe colours are yellowifh brown on a ground of chefnut brown 5 ufually opaque, or fligbtly tranllucent at the edges. Spec. grav. 2.56 to 2.6. Chem. Char.—Infufible before the blow pipe. Localities, 6cc.—This mineral, as its name imports, is brought from Egypt, where, as was obferved by Cor- dier, it conftitutes part of a breccia which is entirely compofed of fragments of liliceous ftones, immenfe ftra- ta of which are found in that country, and the deferts of Africa in the vicinity. The maiTes of jafper are found among the fand which has been derived from the decompofition of this breccia, and particularly near Suez. XJfes.—This variety, on account of its hardnefs and beautiful colours, is in conliderable ellimation for orna¬ mental purpofes. Subfpecies 2. Striped Jasper. Id. Kirw. i. 312. Le Jafpe Rubane, Broch. i. 334. ^uartx-Jafpe Onyx, Haiiy, ii. 430. Exter. Char.—This variety of jafper is found madive, and fometimes forms entire beds. It has no luftre, ex¬ cept from the mixture of extraneous Jubilances. Frac¬ ture conchoidal, fometimes fplintery or earthy. Frag¬ ments Sharp-edged. To the variety of colours of this mineral it owes its name. Thefe are pearl gray, yellow-ifti and greenifh gray, with (hades of red and blue, and thefe different colours are arranged in ftraight or curved lines y gene¬ rally opaque, tranflucent only at the edges. A L O G Y. 171 Localities, &c.—This variety of jafper abounds in Si- Siliceous beria: it is found alfo in Saxony, in the Hartz, where , Se”us- t it repofes on gray wncken 5 in Sicily ; and in the hills in the vicinity of Edinburgh. Subfpecies 3. Porcelain Jasper. Pwcellanite, Kirw. i. 313. Le Jafpe Porcelaine, Broch. i. 336. Thermantide Porcellamte, Hairy, iv. 510. Exter. Char.—Ufually found in maffes or angular pieces, in which rents or fiffures are often obferved, and alfo in whole beds. Internal luftre glimmering or weakly (hining ; refinous. Fra&ure imperfe£t conchoidal or uneven. Fragments fharp-edged. The colour exhibits great variety 5 pearl, a(h, yel- low iftr and bluifh gray, wuth {hades of yellow', red, and rarely green. The colour is generally uniformly the fame, but fometimes it is ftriped and dotted, llamed and clouded *, impreflions of vegetables of a red colour are obferved qn the blue varieties, and the rents or fiffures are of a red colour in the grayifti fpecimens j is entire¬ ly opaque ; pretty hard, and ealily frangible. Chem. Char.—Melts before the blow-pipe into a black flag. Confituent Parts. Rofe. Silica, 60.75 Alumina, 27.27 Magnefia, 3. Potaih, 3-66 Oxide of iron, 2.50 97.18 Lofs, 2.82 ,5 100.00 Localities, &c.—This mineral is abundant in different parts of Bohemia ; it is met xvith alfo in Saxony, in the rocks in the vicinity of Edinburgh, and on the coaft of Fife near Dyfart in Scotland. This jafper derives its name from its fracture, which refembles that of porcelain ; and as it is frequently found in places where fubterraneous fires have exifted, fuch as beds of coal which have been kindled by ac¬ cident, it is aferibed to their aclion j and according to Werner, it is nothing more than a flaty clay altered by fire. Subfpecies 4. Common Jasper. Id. Kirw. i. 310. Jafpe Commun, Broch. i. 338. Exter. Char.—This variety is ufually found maflive, fometimes diffeminated, or alternating in thin layers with o*her ftones. Luftre glimmering or Ihining, between vitreous and refinous. Fracture more or lefs perfedfly conchoidal, fometimes fplintery or earthy; Fragments fharp-edged. Colours extremely various, exhibiting different (hades of red, yellow, and black j and feveral of thefe are united together, prefenting clouds, fpots, and ftripes. Ufually opaque, or (lightly tranflucent at the edges. Is fcratched by quartz. Eafily frangible. Spec. grav. 2.3 to 2.7. Chem. Char.—Entirely infufible before the blow'- Y 2 pipe. Part 1. I 172 MINERALOGY Siliceous pipe. Its conflituent parts are extremely variable. The ge”us~ , following were obtained by the analyfis of Kirwan. Silica, 75 Alumina, 20 Oxide of iron, ^ 100 Localities, &c.—This jafper is Very common in diffe¬ rent parts of the world j in Saxony, Bohemia, Hungary, l1 ranee, Spain, Italy, Siberia, and alfo in Scotland, as among the bafaltic rocks at Dunbar. It is dually found in veins, efpecially inch as contain ores of iron. It is often traverfed with veins of quartz, or mixed with pyrites, lithomarga, femiopal, brown fpar, native and vitreous iilver. It has been taken for the balis of feme porphyries, but thefe turn out to be indurated clay, pitch done, and horn done. Subfpecies 5. Jasper Agate. Extcr. Char.—This variety feems to be the fame as that already mentioned under the name of agate jafper, in fpeaking of agates at the end of the defeription of calcedony. It is found maflive, and poilefles no ludre. Fra (dure conchoidal, generally opaque, pretty hard, and fometimes adheres to tiie tongue. The colours are yellow'idr or reddifh white, which are difpofed in dripes and circles. Localities, &c.—It is met with in many places in agate balls, in amygdaloid rocks. Subfpecies 6. Opal Jasper. Exter. Char.—This variety of jafper feems to poffefs many common chara&ers with fome varieties of opal. It is found madive. Internal ludre between vitreous and reiinous, is diining or refplendent. Fra&ure con- g choidal. Fragments very diarp edged. Colours fcarlet red, blood red, brownidi red, more rarely yellow. Colours difpofed in veins, fpots, and clouds. Opaque, or tranflucent at the edges. Brittle, and eafily frangible. Localities, &c.—This mineral is found in Hungary, in Siberia, and other places, and is ufually in neds in por- phyry. Befide the localities of the different varieties of jafper already mentioned, w'e may notice that it is met with in Siberia of a white and bluilh colour. The hill on which the fortrefs of Orikaia dands on the left bank of the river Jaik, in the government of Orembourg, is en¬ tirely compofed of a pale green and deep red jafper, difpofed in inclined beds ; and on the mod elevated parts of the Altaian mountains, near the fource of the river Korgou, a jafper has been difeovered of an ivory white colour, which is remarkable for being penetrated with black dendrites. Efcs of jafper. — It is valued according to its hard- nefs, the degree of polifh of which it is fufceptible, and the beauty and variety of its colours; and it is employ¬ ed in forming vafes, handles for fwords and knives, and other fmaller ornamental purpofes. 36. Species. Heliotrope, or Bloodfone. Lleliotropium, Kirw. i. 314. VHeliotrope, Broch. i. ^uart%-jafpe Sanguiti, Haiiy, ii. 436.. Exter. Char —Heliotrope is found madive or in an¬ gular pieces j external ludre glimmering or ihining, and refinous; fratlure conchoidal, fometimes uneven. Fragments very diarp-edged. Colour chiefly deep green, but of various fliades, with fpots of olive and yellow, but mod frequently fcailet or blood red : tranflucent at the edges : hard, ealily fran¬ gible. Spec. grav. 2.62 to 2.7. Chem. Char.— Itntirely infudble before the blow pipe. Localities, &c.— I his mineral was originally brought fiom the eaft, -but it has flnee been found in Siberia, in Bohemia, where it is met with in a vein, and in Ice¬ land. Ifes.—It is employed for fimilar purpofes with jafper or agate. By many mineralogids this mineral is confidered as a variety of jafper j hence it has been called oriental jafper-, and it is fuppofed by fome to be a calcedony pene¬ trated with green earth. 37. Species. Chrysoprase. Chryfoprafium, Kirw. i. 284. La Chryfoprafe, Broch. i. 280. ^uartz-Hgathe Prafe, Hairy ii. 426. Exier. Char.— This mineral is found maflive, or in angular fragments : internal ludre rarely glimmering j fraefure even, fometimes fplintery j fragments fliarp- edged. Cofeur apple-green, greenifli gray, or leek-green; tranflucent, fometimes femitranfparent ; lefs hard than calcedony and flint. Spec. grav. 2.25. Chem. Char.—Infulible before the blow'-pipe, but lofes its tranfparency, and becomes white. Conf ituent Parts. Klaproth# Silica, 96.16 Alumina, ,08 Lime, .82 O-ide of iron, .08 Oxide of nickel, 1.00 Lofs, 1.86 100.00 Localities, &c.—Chryfoprafe is found at Kofevnutz, in Upper Silelia, in a mountain compoled of Terpentine, afbedus, indurated talc, and lithomarga. Efes.—It is employed for flmilar purpofes as jafper, and it is greatly edeemed when it is of a fine apple- green colour. It is faid that fome varieties of this mi¬ neral lofe their colour by being expofed to moidure, fo that the jewellers, before ufing them, put them to the ted, by keeping them for fome time in a mold place. 38. Species. Plasma. Id. Broch. i. 278. Silex Plafrne, Brongniart, ii. 398. Exter. Char.—This mineral is found difleminated, in rounded pieces, and alfo in angular pieces. Internal ludre glimmering or w^ealtly fhining ; refinous. Fradiure conchoidal, even, and fometimes fplintery. Tranflu¬ cent, and. fometimes even tranfparent in thin pieces. Colour, various fhades of green j and fometimes differ¬ ent colours are difpofed in 'fpots, dripes, and points. Nearly Part I. 1. Part I. MINER Clairifica- Nearly equally hard with calcedony. brittle, and eafily tkm. frangible. V*^> Chem. Char.—It is infufible before the blow-pipe, but becomes white. Localities, &c.—Itisfaidby fome,that this mineral has only been found among the ruins of Rome, but accord¬ ing to Brongniart and others, it has been found in the Levant, in Upper Hungary, and in Moravia, in a mountain of ferpentine, where it is accompanied with dint. \Jfes.—It appears that this mineral was much em¬ ployed by the ancients for ornamental purpofes. 39. Species. Cat’s Eye. . Id. Kirw. i. 301. VOeil de Chat, Rrochant, i. 292. QnartK-Agathe Chatoyant, Haiiy, ii. 427. Exter. Char.—This mineral, as it is brought from its native country, is ufually cut and polifhed, fo that its natural form is unknown 5 but it is fuppofed that it is met with in grains or rounded pieces. A mafs defcribed by Klaproth, which feemed to be in its natural date, had a quadrangular form, a rough fur- face, and confiderable brilliancy. The luftre is re- fplendent and refinous. The crofs frafture is uneven, the longitudinal frafture imperfedfly foliated. Frag¬ ments more or lefs fharp-edged. The colour is greenilh yellowifh and fmoke gray, of various (hades, and fometimes, but rarely, grayilh or filvery white. It is tranflucent, rarely femitran(parent. When it is cut, it refledls different rays of light by changing its pofition, a chara&er, by which it is eafily known. This is afcribed to fmall parallel fibres which appear in the interior of the (lone. It is hard, eafily frangible. Spec. grav. 2.625 to 2.660. Chew. Char.—It melts with great difficulty by the adfion of the blow-pipe. Klaproth fubjedled it to the heat of a porcelain furnace, but it was not melted ; it only loft its hardnefs, luftre, and tranfparency, and the colour became of a pale gray. CsnJHtuent Parts* Klaproth. Silica 95-oo 94-5° Alumina t-75 2,0° Lime 1.50 I*5° Oxide of iron 0.25 0.25 Lofs 1.50 1.75 100.00 100.00 Localities.— Cats eye is brought from Ceylon and the Malabar coaft, and alfo, it is laid, from Egypt and Arabia •, but always in the poliftied ftate. The only one known in its natural ftate was that above mentioned, which was prefented to Klaproth by Mr Greville of London. XJfes.—This mineral is in great eftimation as a pre¬ cious ftone, and it is ufually cut for ring-ftones. The name is derived from its pofleffmg the property of refieding the light fimilar to the eye of the cat, and hence the term chatoyant among jewellers, which is expreffive of this effeif. 49. Species. Obsidian. Id. Kirwan, i. 265. Iceland agate vulgo. DObJidienne, A L O G Y. Brochant, i. 288. Lave viireuje Objidienne, Hauy, iv. 594. , Exter. Char.—This mineral is found in maffes, and fometimes in rounded pieces. Luftre refplendent, vi¬ treous ; fradure perfedly conchoidal ; fragments very fharp-edged. The moft common colour of obfidian is perfedly black, fometimes greeniftr and grayifh, black, blueifli, greenifti and fmoke gray, and yellow7 and red, ac¬ cording to Humboldt \ moft commonly opaque, but fometimes tranflucent on the edges. It is hard and eafily frangible. Spec. grav. 2.348. Chem. Char.—Before the blow pipe obfidian melts into an opaque porous glafs, of a grayiih white co*- lour. Bergman Silica 69 Alumina 22 Oxide of iron 9 Conjlituent Parts. Abilgaard. 74 12 14 100 100 Defcotils. Silica 72.O Alumina I2.J Lime Oxide of iron 1 ^ 0 and manganefej Potafti and foda 10.0 Lofs 3.5 Drappier. 74. 71.O H- 13-4 1.2 1.6 3-° 3- 3 4- 5 4.0 4.0 6.0 100.0 100.0 100.0 Localities, &c.—This mineral is found in Iceland,- in Siberia, in the Lipari iflands, in Hungary, in Madagafcar, the ifland of Teneriffe, in Mexico, Peru, and fome of the South fea iflands. Humboldt difcover- ed a variety of obfidian in New Spain, which was chatoyant in a confiderable degree. The obfidian from Hungary is found in infulated pieces among detatched maffes of granite, gneifs and decompofed porphyry. Obfidian was long fuppofed to have a volcanic origin j but it appears from the accounts of thofe who have vifited Iceland, that it is not only found in the vicinity of Hecla, but everywhere, diftributed like quartz and flint j and befides it is not unfrequent in countries where volcanoes were never known to exift. XJfes.—The fine colour and bardnefc of this ftone have brought it into ufe for ornamental purpofes. Among the ancient Mexicans and Peruvians it was em¬ ployed as mirrors, fome of which,, it is faid, are fome¬ times (till found in the tombs of their ancient fovereigns {Eaujas Miner, des Volcans, p. 308) \ and alfo for cut¬ ting inftruments as knives and even razors. Hernan¬ dez faw the Mexican cutlers make a hundred knives of obfidian in the courfe of an hour. Obfidian, it is faid, has alfo been ufed as mirrors for telefcopes. 41. Species. Pitchstone. Id. Kirwan, i. 292. La pierre de poi», Brochant, h 3 ^3. Petroflex refniforme, Hauy, iv. 386. Exter Char.—Pitchftone, which has received its name ..I73 Siliceous genus. J 74 Siliceous *• genus. MINER name from its refemblance to pitch, is found maffive ; , fometimes in extenfive beds and veins, and alfo forming entire mountains. Internal luftre Ihining and refinous. Fragments fharp-edged. In coarfe and frequently fmall granular difl:ifi6l concretions which have a fmooth fur- face, I he colours arc various fhades of black, green, brown, red, and gray. Tranflucent, but commonly at the edges only. Brittle, and rather eafily frangible. Spec, grav. of pitchftone from Saxony, 3.314 ; of black pitch- ifone from Arran 2.338 ; of pitchilone from Meiflen, I.645, Klaproth. Chem, C/z^r.—Fufible by the blow-pipe, and is con- verted into a white porous enamel. Conjlituent Parts of pilchjlone from Meijfen of an olive green colour, Klaproth, Tranfl. ii. 207. tion. Silica Alumina Lime Oxide of iron Oxide of manganefe Soda Water Lofs 73 14.50 1 1 0.10 *•75 8.50 *•5 100.00 Localities. Sic.—Pitchftone is found in great abun¬ dance in Saxony, in Hungary, and alfo in Siberia. It abounds alfo in Scotland, particularly in the ifland of Arran, where it is met with in beds, but chiefly in veins traverfing the ftrata in the lefs elevated parts of the ifland. Pitchftoue alfo forms the bafis of a porphyry. 42. Species. Pearlstone. Obfdienne Perlee, Brongniart, ii. 340. Lave Vitreufe Per/c'e, Haiiy, iv. 495. Volcanic Zeolite, Fichtel. Zeolitic Pitchftone of others. See Klaproth, Tranfl. ii. 263. Exter. Char.—Pearlftone almoft always forms the ground or bafis of a fpecies of porphyry which contains roundiflv or longifh veficuiar cavities. Luflre pearly. Fra&ure feems imperfe£Uy conchoidal j but^ is not very perceptible. Fragments blunt-edged. Colour bluifh, afh, greenifli gray. Tranflucent at the edges. When breathed upon gives out the argilla¬ ceous odour. Not brittle, but eafily frangible. Soft. Spec. grav. 2.340 to 2.548. Chem. Cliar.—Before the blow-pipe froths up like zeolite, but is not fufed. Confituent Parts. Klaproth, ii. 267. Silica 75.25 Alumina 12. Oxide of iron 1.60 Lime .50 Potaflr 4. r0 Water 4.50 Lofs 1,65 A L O G Y. Part 1.' Localities, &c.—Pearlftone is found near Tokay in Claffifka* Hungary, in ftrata alternating with thofe of argillaceous porphyry, and containing in its veficles nodules of oblidian j it is alfo met with in the north of Ire¬ land. 43. Species, Pumice. Id. Kirw'an, i. 415. La Pierre ponce, Brochant, i. 443; Ponce, Brongniart, i. 332. Lave vitreufepumicee, Haiiy, iv. 495. Exter. Char.—-This mineral is found maflive or dif- feminated, and it is always of a porous or veficuiar texture. Luflre glimmering, or a little fhining and filky. Fra61ure fibrous; fragments blunt-edged. Colour grayifh whife, bluilh, or yellowifli gray. O- paque, rarely tranflucent at the edges, fometimes femi- hard, but generally foft, very brittle, and very eafily frangible. Spec. grav. 0.914. Chem. Char.—Fufible before the blow-pipe, and is converted into a white glafs. Confituent Parts. Klaproth, ii. 208. Silica Alumina Oxide of iron Soda of potafti Lofs 77-5° I7'J° *•75 3* •25 100.00 100.00 Localities, &c.—Pumiceftone has been fuppofed to be a volcanic produdlion, becaufe it is found in the vi¬ cinity of volcanoes; the Lipaii iflands are almoft entire¬ ly compofed of it, and there it is accompanied with oblidian. It is alfo found in Iceland and Teneriffe ; in Hungary ; and on the banks of the Rhine between An- dernach and Coblentz. Wes‘—Pumice is very much employed in polithing ft ones, metals, glafs, ivory, and in the preparation ef parchment. A rare variety of pumice is deferibed by Brongniart in the form of vitreous filaments as fine as hair; the co¬ lour is a deep bottle green, and it melts by heat into a white enamel. This pumice is fuppofed to be projected from the volcano in the iile of Bourbon. 44. Species, Prehnite. / filling the cavities and veins of a foft argillaceous ichiftus. It has fince been found in Stenna-Gwyn mine, in the parifti of St Stephen’s, Corn¬ wall, where it is accompanied with fuljahuret of tin, copper, and iron. 54. Species. Andalusite. Adamantine Spar, Kirwan, i. 337. Spath Adamantin, Bournon, Jour, de Phyf. 1789. Feldfpath Apijre, Haiiy, iv. 362. Exter. Char.—This mineral is found maffive, and cryftallized in redlangular four-fided prifms, the fum- mits of which are obliterated. Luftre weakly Ihining and refinous. Longitudinal fraflure foliated. Crols fradlure a little fplintery. Colour reddilh brown or violet 5 tranflucent at the edges. Very hard j fcratches quartz, and fometimes even fpinelle. Difficultly frangi¬ ble. Spec. grav. 3.165. Chem. Char.—Infufible before the blow-pipe. Localities, &.C.—lifts mineral was firft difcovered by Bournon in the granitic rocks of Forez, where it occu¬ pies a vein of common feldfpar. It has been found al¬ io in Spain, wioere it enters into the compofition of a granite, and frequently contains fcales of mica. When firft difcovered, it was fuppofed to be a variety of ada¬ mantine fpar or corundum ; but its inferior fpec. grav. and the difference in the ftruflure of its ciyftals, afford fufficient charafteriftic differences. 55. Species. Feldspar. This fpecies is divided into the five following fubfpe- cies : 1. Adularia. 2. Labradore ftone. 3. Common feldfpar. 4. Compact feldfpar. 5. Hollow fpar. Subfpecies 1. Adularia. % Moonjlone, Kirwan, i. 322. VAdulaire, Brochant, i. 371. Feldfpath Nacre, Haiiy, ii. 606. Exter. Char.—This mineral is found maffive or cry¬ ftallized. The forms of its cryftals are, 1. A four-fided rhomboidal prifm. 2. A perfeft rhomb, more or lefs oblique. 3. A reft angular four-fided table, with ob¬ lique terminal faces. 4. A fix-fided prifm. 5. A fix- fided table. Surface of the cryftals fmooth or longitu¬ dinally ftreaked. Luftre ftiining or refplendcnt. Inter¬ nal luftre refplendent, vitreous, or pearly. Frafture foliated. Cleavage double. Fragments rhomboidal. Colour yellowiffi, greenifti, or milk-white : is fome¬ times., > Part I. MINERALOGY. Claffifica- times chatoyant. Is always tranflucent; fometimes fe- tl0n* mitranfparent. Hard j fcratches common feldfpar. y “ Brittle, and eafily frangible. Spec. gray. 2.500 to Chew, Adularia before the blow-pipe cracks and fplits, and then melts into a white glafs. Silica Alumina Lime Potafh Magnelia Oxide of iron Sulphate of barytes Water Lofs Csnjlituent Paris. Vauquelin. 64 20 14 Weftrumb. 62.50 6.50 6. 1.40 2. •25 3-85 100.00 Localities,&LC.—This mineral was firfl found by Pi- ni in one of the fummits of St Gothard in Switzerland j this fummit is called Adula, and from this it takes its name. It is faid that it forms particular beds, inter- pofed between micaceous fchiltus and gneis. It is ac¬ companied with quartz, mica, and common feldfpar. Subfpecies 2. Labradore Stone. Id. Kirwan, i. 324. La Pierre de Labrador, Bro- chant, i. 369. Feldfpath Opalin, Haiiy, ii. 607. Exter. Char.—This mineral is found maffive, and in rounded pieces. Internal luftre (hining, fometimes re- fplendent ; pearly, or vitreous. Fradlure perfectly fo¬ liated, with a double cleavage. Colour, molt commonly dark or deep alh gray ; but by varying its pofition it reflects difterent colours, as blue, green, yellow, brown, and red *, and thefe colours exhibit ftripes, fpots, and dots. It is itrongly tranflucent. Spec. grav. 2.6 to 2.7. Chetn. Char.—Before the blow-pipe fufible into a white enamel. Conjlituent Parts. Bindheim. Si lie ecu* Subfpecies 3. Common Feldspar. genus- Id. Kirwan, i. 316. Le Feldfpath Cotntnun, Brochant, i. 362. Feldfpath, Hairy, ii. 590. Exter. Char.—Feldfpar is . found maflive, difleminat- ed, in rounded pieces, or cryllallized. Its forms are, I. A broad fix-fided prifm with unequal angles, termi¬ nated at each extremity by an obtufe bevelment, whofe faces are placed on the twro lateral edges. 2. A four- fmed rhomboidal prifm. 3. A four-fided redtangular prifm, having the lateral edges fometimes truncated j and 4. A flx-fided table. Double cryftals are fome- tiraes met wdth. Luftre (hining ; internal luftre alfo Alining, fometimes reiplendent, vitreous or pearly. Fra&ure perfectly foliated •, fragments rhomboidal. Colours milk-white, yellowilh, grayiflr, reddifh, and greeniflr. Tranflucentj fcratches glafs; brittle, and ealily frangible. Spec. grav. 2.437 to 2.704* Chem. Char.—Before the blowT-pipe melts into a white glafs. Silica, Alumina, Lime, Oxide of iron, Potaih, Barytes, Magnefia, Lofs, Confituent Parts. Vauquelin- 62.83 17.2 3* 1. I3- Kirwan. 67 14 3* *5 100.00 11 8 100 Chenevix. 64. 24. 6.25 3*75 100.00 Localities, &c.—Feldfpar is one of the mod common fubftances, and the moft univerfally diftributed in na¬ ture. It does not exift, howrever, in large maffes. It forms one of the component parts of granite, gneis, fye- nite, and porphyry. When expofed to the aftion of the air, it is very li¬ able to decompofition, and then it is converted into a white earthy mafs, which is employed in the manu- fadlure of porcelain. This is the kaolin of the Chi- nefe. Silica, 69.5 Alumina, Sulphate of lime, I 2. Oxide of copper, .7 Oxide of iron, .3 Lofs, 3.99 100.00 Localities, &c.—This done was firft brought from the ifland of St Paul, near the coaft of Labradore, whence its name. It has been fmee found in Bohemia, and near the lake Baikal in Siberia. It is rarely found in its native repofitory, but it is fuppofed to belong to pri¬ mitive rocks ; for it is accompanied with fchorl, mica, and hornblende. Vfes.—The brilliancy of its colours, and particularly its chatoyant properly, have brought it into ufe in jewel- lery. Subfpecies 4. Compact Feldspar. Continuous Feldfpar, Kirw. i. 323. Le Feldfpalh Com- paFle, Broch, i. 367. Feldfpath Compacie Bleu, Haiiy, ii. 605. Exter Char.—This variety is found maflive, and al¬ fo in rounded pieces. Luftre weakly (hining, or only glimmering. Fraftiwe imperfeftly foliated, fometimes fplintery. Fragments not very (harp edged. Colour bluifli white, greenifti or yellowifti ; tranflu¬ cent, but fometimes only at the edges. Streak white ; is fcratched by quartz. Chem. Char.—Fufible before the blow-pipe. Localities, &c.—Compaft feldfpar is found in Sax¬ ony, and in the Tyrol. It is not uncommon in Scot¬ land. as in the Grampian mountains, on the Pentland hills, and Saliibury. rocks in the neighbourhood of Edinburgh. The cryftals of feldfpar obferved in an- Z 2 tique 18o Siliceous tique green porphyry, are fuppofed to belono- to this SenU3, variety. M I N E R A L O G Y. 57. Species. Arctizite. Part T. Species 5. Hollow Spar, or Chiajlolite. Mac/e, Broch. ii. 514. Id. Hauy, iii. 267. FJfen. Char.— Divifions parallel to the faces of a prifna, llightly rhomboidal. A black fubftance fur- rounded by aiiother of a whitifh colour. Exter. Char.—This mineral has been found only cry- flallized in four-fided, nearly reftangular prifms. The fummit is always broken, by which the arrangement of the two fubftances is obferved. The white part is the outermoft ; the black matter forms in the centre a fmall prifm, whofe fides correfpond wuth tliofe of the outer cryflal. From the angles of the central prifm proceed four narrow lines, which extend to each of the angles of the outer prifm 5 and fometimes this black fubffance forms at the extremity of thefe lines, or in the angles of the large prifm, a fimilar fmall prifm of black mat¬ ter. The black matter is an argillaceous fchiftus, fimi¬ lar to the repofitory of the cryltals. The white part is fometimes weakly fhining ; internal luftre glimmer¬ ing, refinous. The black part is nearly dull. Frasflure foliated ; the black part earthy. The colour of the white part, yellowifh, or grayifh white •, that of the black part, grayiih, or bluifh black. Opaque, or tranfiucent. Semihard, fcratching glafs when foliated. Streak white. Brittle ; not very fran¬ gible. Spec. grav. 2.944. Communicates to fealing wax, negative eleftricity by friftion. Chem. Char.— Before the blow-pipe, the white part melts into a whiter glafs $ the black part into a black glafs. Localities, &c.—This mineral has been found in Brit¬ tany in France, imbedded in argillaceous fchiftus; in the Pyrenees, in a fimilar rock, lying immediately on gra¬ nite, near St Jacques de Compoftella in Spain ; and in the mountains of Cumberland, alfo imbedded in argil¬ laceous fchiftus. The name chiajlolite is derived from the appearance of the feftion of the cryftal, which is fuppofed to have fome refemblance to the Greek letter 56. Species. Scapolite. Scapolithe, Brochant, ii. 526. Id. Haiiy, iv. 292. Rapi- do lithe, Abilgaard. Exter. Char.—This mineral has been found maffive, but moft frequently cryftallized in reftangular, four- fided prifms, having the lateral edges truncated. The cryftals are fmall, fometimes acicular, commonly elon¬ gated and aggregated. Their furface is longitudinally ftreaked and glimmering. Internal luftre w’eakly thining, vitreous or refinous. Frafture foliated. Colour grayifti white ; tranfiucent, or rarely tranfpa- rent. Scratches glafs, and is brittle. Spec. grav. 3.68 to 3.70. Chem. Char.—Froths up before the blow-pipe, and melts into a white enamel. Localities, &c.—This mineral has been found in the mines of iron ore near Arendal in Norway. The cryftals are mixed with mica and calcareous fpar. Wernerite, Hairy, iii. 119. Id. Brochant, ii. 529. EJfen. Char.—Spec. grav. 3.6. Phofphorefcent by heat, but not by percufiron. Exter. Char.—This mineral is found maftive, or cry¬ ftallized in four-fided re&angular prifms, termina¬ ted by an obtufe four-fided pyramid. The lateral edges are truncated, fo that the prifm appears to be eigbt-fided. Cryftals fmall ; luftre refplendent, fome¬ times weakly ftrining, and pearly or refinous. Fradlure foliated. Folia curved in two direflions. Colour between piftachio green and ifabella yellow. Tranflucent. Scratches glafs, and ftnkes fire with fteel. The powder thrown on hot coals phofphoreices in the dark. (‘hem. Char.—Before the blow-pipe it froths up, and eafily melts into an imperfect, white, and opaque ena¬ mel. Infoluble in nitric acftd. Localities, &c.—This mineral is found in the iron mines of Northo and Ulrica in Sweden, Bouoen near Arendal in Norway, and at Campo Longo in Switzerland. 58. Species. Diaspore. Id. Brochant, ii. 507. Id. Hairy, iv. 358. Exter. Char.—This mineral is of a gray colour. Luftre ftiining, pearly. Fra&ure foliated, with the folia a little curved ; feparates into rhomboids, with angles about 130® and 50°; fcratches glafs. Spec. grav. 3-43 2. Chem. Char.—A fragment of this ftone heated for a little in the flame of a candle decrepitates and dif- perfes in all diredfions ; from this property it obtained its name, which fignifies to dijperfe. Heated in a clofe crucible to prevent the fragments from flying off, they were reduced to white ihining particles, fomewhat re^- fe.mbling boracic acid. Conjiituent parts. Alumina Oxide of iron Water Vauquelin. 80 3 17 100 Localities, &c.—The repofitory of this mineral is unknown. It was connected with an argillaceous ochrey rock. This mineral approaches nearly to hydrargillite or waveliite, deferioed above, in its conftituent parts; but the proportions and fome of the external cha- ra&ers are different. 59. Species. Spodumene. Id. D’Andrada, Jour, de Phyf. an 8. p. 240. Triphane, Hairy, iv. 407. Id. Brochant, ii. 528. Exter. Char.—This mineral is found in fmall maffes, which prefent fome appearances of cryftallization. Luf¬ tre fhining, pearly. Fradure in the* mais radiated, of Angle Part T. Giafilfica- tion. MINERALOGY. {ingle cryflals foliatecl and diviable in three dire&ions, which fotnetimes aff rd an oblique angled prifm of about too0 and 8o°. Oofs fra&ure dull, rough, and fplintery. In larger maifes the fracture is radiated. Luftre ihining pearly. Scratches glafs. Colour greenifli white or leek green. Tranfluccnt at the edges. Brittle. Spec. grav. 3.192 to 3.218. Chem. Char.— Before the blow-pipe it feparates at firft into fmall yellowilh plates, and then melts into a gray- ifh white tranfparent glafs. Conjlituent Parts. Vauquelin.' Silica 56.5 Alumina 24 Lime 5 Oxide of iron 5 Lofs 9.5 IOO.o Localities, &c.—This mineral has been found in the mines of Utoe near Dalero in Sweden. Its repofitory feems to be a vein, w'here it is accompanied with quartz and black mica. The name triphane has been given to this mineral by Hauy from its peculiar three-fold natural divifions. It received the name fpodumene, which lignifies cover¬ ed with ajises from D’Andrada. 60. Species. Meionite. Id. Hauy ii. 586. Id. Brochant ii. 519. Effen. Char.—Divifible parallel to the faces of a prifm with fquare bafes. Eafily fufible into a fpongy white glafs. Exter. Char.— It is found cryfhillized in four-fided re&angular prifms whofe lateral edges are always trun¬ cated. It is terminated by an obtufe four-fided pyramid fet on the lateral edges. Sometimes the lateral edges are doubly truncated, thus forming a fixteen-fided prifm. The cryftals are fmall, adhering laterally and arranged in rows to the matrix. Luftre ftiining, vitreous. Longitudinal fradlure foliated, and parallel to the four faces of the prifm. Crofs fra&ure {lightly conchoidal. Colour grayifti white. Semi-tranfparent. Scratches glafs. Chem. Char.—Melts very eafily before the blow-pipe with confiderable intumefcence accompanied with a bif¬ fing noife. Localities, &c.—This mineral has only been found on Vefuvius near Mount Somma. The cryftals are ufually attached to fragments of foliated limeftone. rent. The lharp points fcratch glafs, the others leave only a white trace. Eafily frangible. Specific gravi- . k ty 3.2441. Chem. Char.—Funble into a glafs by long continued heat. Becomes opake in nitric acid, hence the name nepheline, fignifying cloudij, given to it by Hauy. Conjlituent Parts. Vauquelin. Silica 46 Alumina 49 Lime 2 Oxide of iron 1 Lofs 2 100 Localities, &c.—This mineral is found lining the cavities of rocks on Mount Somma, from whence its name fommite. It is accompanied with vefuvian and black fchorl, all which are fuppofed by fome to be ejec¬ ted matters from Vefuvius. 62. Species. Ichthyophthalmite. Id. D’Andrada. Ichthijophthalme, Brochant, ii. 552. Slpoplujllite, Hauy. Id. Brongniart, i. 385. Exter. Char.—This mineral is found maflive, and cryftallized in rhomboids which approach nearly to the cube ; in thick fix-fided tables, and in rectangular four-fided tables, with truncated edges. Luftre ftiin- ing, pearly. Frafture foliated 5 cleavage fingle ; crofs fra6ture fine grained uneven, and weakly ihining. Colour yellowifh or greenifh w hite ; tranflucent or femitranfparent. Scratches glafs j not eafily frangible. Spec. grav. 2.46. Chem. Char.—Expofed to the blow-pipe, is with difficulty reduced to a white enamel. In nitric and muriatie acids it forms a jelly. Conjlituent Parts. Fourcroy and Vauquelin- Silica, 51 Lime, 28 Potafti, 4 Water, 17 100 Localities, &c This mineral is found in the iron mine of Utoe in Sweden, imbedded in a violet-colour¬ ed limeftone, and accompanied with greenilh hornblende and oxide of iron. IV. ARGILLACEOUS Genus. 61. Species. SOMMITE. Nepheline, Hauy iii. 186. Id. Brochant, ii. 522. EJfen. Char.—Divifible parallel to the fides and bafes of a regular fix-fided prifm. With difficulty fcratches glafs. Exter. Char.—This mineral is found diffeminated in grains or in fmall cryftals, which are commonly perfect fix-fided prifms. The lateral faces are fmooth and fiiining, with a vitreous luftre. Longitudinal fraflure foliated. Crofs frafture conchoidal and Alining. Co¬ lour grayifti white. Tranflucent, rarely femitranfpa- 1. Species. Native Alumina. Native Argil, Kirw. i. 175. DAlumine Pure, Bro- • chant, i. 318. Exter. Char.—This mineral is found in kidney-form' mafles j it has no luftre j fradlure earthy j fragments blunt edged. Colours fnow or yellowiffi white; opaque j ftains a little ; tender or friable j adheres a little to the tongue, feels meagre j gives out an earthy fmell when breathed on.- Spec. grav. 1.30540 i.6<5» Chem,. M I N E R A 182 ous’lcnu'" c 9,ns'n‘ Char.*—Before tiie blow-pipe is abfolutely in- V—fufible, but difiblves almoft entirely in acids. LOGY. SubfpecieS I. Loam. Conjlituent parts. Fourcroy. Alumina Sulphate of lime 24 Water 27 Lime and filica 4 100 Eut according to the analylis of others, it is compofed almoft entirely of pure alumina, mixed only with a hnall proportion of lime and lilica. Localities, &c.—It is found at Halle in Saxony, in part of tne garden belonging to the college, immediate¬ ly under the foil5 but being only in fmall quantity, and in the neighbourhood of a large laboratory, has led to the luppofition that it is an artificial prodmfHon. It is faid that it has been alfo found at Magdeburg in Lower Saxony, in Silefia, near Verona, and in England. 2. Species. Porcelain Earth, Exter. Char.— This mineral is found rnailive and in great abundance ; ha? no luftre ; fradlure uneven or fine earthy ; fragments very blunt-edged 5 has little coherence ; Rains. Colour yellowilh-gray, or fpotted with yellow and brown, feels fomewhat greafy, and adheres Rrongly to the tongue. Localities, &c.—Loam is found in great abundance every where, and perhaps it ought to be confidered as a mixture of different fubftances, rather than as a Am¬ ple mineral. Subfpecies 2. Pipe Clay. Exter. Char.— Phis variety is found in great maffes j has fcarcely any lull re ; fra&ure fine earthy, or fine grained uneven ; fragments fharp-edged ; has fome co¬ herence. Colour grayifh or yellowilh white ; ftreak fliining ; feels greafy, adheres itrongly to the tongue, and is eafily frangible. Localities, &cc.—It is very abundant in moft countries, and is ufually found in alluvial land. Porcelain clay, Kirw. i. 178. La Terre Porcelaine, e ur • Brochant, i. 320. 4rgile Kaolin, et Felclfpath Ar- Subfpecies 3. Potters Clay." gill forme, Haiiy, ii. 616. LI. Kirw. i. 180. Argile a Potier, Brochant, i. 322, Exter. Char.—T his mineral is found maffive, or dif- jemmated •, has no luftre ; Rains Rrongly 5 has little co- iierence j adheres a little to the tongue. Colour reddifli, yellowifli, or grayiRi white. Cnem. Char.—Infufible in the flrongefl heat of a furnace. Conjlituent Parts. Vauquelirt. 55- 71.1? 27. 15.86 2. 1.92 •5 ,4* 6.73 I-5 4-34 100.0 100.00 Localities, &c.— Phis mineral is found in confider- aole abundance in beds and veins, in granite and gneis, efpecially when the proportion of feldfpar is confider- able. It abounds in China and Japan, where it is known by the name of kaolin j in Bohemia, Saxony, Denmark, and particularly in many places of France, as at Limoges and Bayonne, and in Cornwall in Eng’- land. In many cafes it feems to be owing to the decom- pofition of granite. -Porcelain earth, as its name imports, is em¬ ployed either as it is found native, or mixed in certain proportions with other earths, in the manufadlure of por¬ celain. Ihat from Limoges in France is employed without any addition. 3. Species. Common Clay. Phis fpecies is divided into five fubfpecies : 1. loam* 2. pipe clay ; 3. potters clay ; 4. variegated clav j and 5. Aaty clay. Silica Alumina Lime Oxide of iron Water Lofs Exter. Char.— Ihis variety is alfo found maflive, and in great abundance. It is intermediate between folid and friable ; has no luflre } fra£lure fine grained ear- tny, fometinaes coarfe grained uneven j fragments blunt- edged. . Colour yellowifli, greeniRi, or grayiRi white ; feme- times reddiRi or ochrey yellow of various Riades. It is opaque, Rains a little ; Rreak a little fliining 5 very brittle, and eafily frangible j is fomewhat du&ile ; ad¬ heres a little to the tongue, and feels greafy. . Chem. Char.—Is differently affedted by the blow¬ pipe, according to the proportion of the different fub- flances of which it is compofed ; but in general is diffi¬ cult of fufion. Effervefces with acids when the pro¬ portion of lime is confiderable. Conjlituent Parts. Silica Alumina Lime Oxide of iron Water Lofs Vauquelin. 43-5 33-2 3-r I. 18. .8 100.0 The proportions of filica and lime vary confider- ably j the filica is very often the predominant ingredi¬ ent. Kirwan examined a potters clay, in which he found 63 parts of filica. Localities, &c.—Potters clay is found in great abun¬ dance in mofl countiier, and in fimilar fituations with the former. It often forms thick beds in alluvial land, alternating with beds of fand. Subfpecies 4. Variegated Clay. Exter. Char.—This mineral is found maflive. Has an Part I. CJaflifica- tion. 3 Part I. ' MINERALOGY. 18 Clafflfica- an earthy fra&ure, a fhining ftreak, and is foft or fri- able. ~ The colour is white, red, or yellow’, and thefe dif¬ ferent colours are fometimes in ftripes, veins and fpots. Adheres a little to the tongue, and feels fomewhat greafy. It is fedlile and light. As this variety of clay forms with water a lefs tena¬ cious mafs than feme of the other varieties, it probably contains a greater proportion of lilicecus earth. Localities, &c.—This mineral is found in Upper Lu- fatia. Subfpecies 5. Slaty Clay. Slate Clay, Shale, Kirwan, i. 182. I?Argtle Schifleufe, Brochant, i. 327. Argile Schi/ieufe ImpreJJionee, Hauy iv. 448. Exter. Char.—This fubfpecies is found maflive j in¬ ternally dull, when free from mica j frafture flaty or earthy j fragments in tables. Colour grayifh, yellowifh, or blackifh, fometimes reddilh or brownilh ; opaque : foft, fedlile, and eafily frangible. Adheres to the tongue 5 feels meagre. Sp. grav. 2.6 to 2.68. Localities, &c.—Ufually accompanies coal, fo that it abounds in all coal countries. It is fometimes mix¬ ed with fand, mica, and iron pyrites. It is known in , this country under the name of ftale, and in Scotland particularly by that of till, or deicribed under the more general denomination of one of the coal metals. Slaty clay is ftill farther diftinguilhed by impreffions of ferns, reeds, or grades. When it is of a black colour, it feems to be owing to a greater proportion of coaly matter. 4, Species. Clay Stonev or Indurated Clay. Indurated Clay, Kirwan, i. 181. UArgile Endurcie, Brocbant, i. 325. Exter. Char.—Indurated clay is always found maf- five •, it is dull •, fraflure compa£l, or fine earthy ; but fometimes fplintery or even, and alfo fometimes ilaty. Fragments more or lefs fharp edged, and fometimes in tables. Colour ufually bluilb, yellowdlh, or greenifh gray, and fometimes pearl gray, grayifh red, whitiih, and brownifh. Thefe colours are often mixed, and are ar¬ ranged in fpots and ftripes. Opaque, foft, rather brittle ; eafily frangible ; adheres {lightly to the tongue ; feels grea'fy. Spec. grav. inconfiderable. Gradually falls to pieces in water, or crumbles into powder. Has but little ductility. Localities, &c.—Indurated clay is very common. It is found in veins, and fometimes in very extenfive beds. It conftitutes the bafis of many porphyries, efpecially in Saxony, where it is abundant. It is found in many parts of Scotland, as on the Pentland hills in the neigh¬ bourhood of Edinburgh. Stourbridge clay, according to Mr Kirwan, may be included under this variety. It is of a gray colour •, does not adhere to the tongue •, part is foon diffufed in water, and another part falls into powder. Mr Kir¬ wan found it to contain 12.5 of moifture, 12 of a .coarfe white fand. 30 of a fine brownilh fand, and even the remaining or argillaceous part wTas not entirely freed from fand but by boiling in acids. 5. Species. ADHESIVE SLATE, Le Schi/le a Polir, Brochant i. 376. Schijie a Polir, Hauy, iv. 449. Polifhing Slate, Klaproth, i. 455. Analyt, Eff. Tranfl. Argillace¬ ous genus. Exter. Char.—This mineral is found maffive j is al¬ ways internally dull; has a flaty or fine earthy fracturej fragments flaty or in tables. Colour clear gray, whitiih or reddilh 5 opaque or {lightly tranflucent at the edges ; gives a ftiining ftreak; is feftile, foft, and very eafily frangible j adheres ftrongly to the tongue 3 feels meagre. Specific gra¬ vity 2.08. Chem. Char.—Immerfed in water, adhefive flate ab- forbs it greedily, air bubbles being rapidly difengaged and with noifej but does not become tenacious. When reduced to powder and calcined, it lofes about one-fifth of its weight. Expofed to ftrong heat, it is converted into a dark gray or yellowilh and porous flag. (Brochant.^ Conjlituent Parts. Klaproth. Silica Alumina Magnefia Lime Oxide of iron Carbone Water and air Lofs 66.5 I. 1.25 25 22. 19. 2.25 62.5 •7' 8. •3 4- •7 22. 1.8 100.00 100.0 Localities, &c.— Adhefive flate forms confiderable beds at Menil-Montant near Paris. In thefe beds ms- niiite already defcribed is found. 6. Species. Polishing Slate. Le Polierfchiefer, Brochant, i. 376. Exter. Char.—This mineral is found raaflive ; inter¬ nally it is dull. Fra&ure flaty, but in lome diredlions earthy. Fragments flaty or in tables. Colour yeliowifli gray or white ; and different colours appear difpofed in flripes 3 is foft 3 adheres to the tongue 3 feels meagre, and is rather light. Localities, &c.—This mineral has been found only, it is faid, in Bohemia, near pfeudo volcanoes, and it is lirp- pofcd, that it is nothing more than indurated coal allies. It approaches fo near in the characters that are given of it to the following, that it might be included undo* the fame fpecies, or confidered as a variety of it. 7. Species. Tripoli. Id. Kirw. ii. 202. Le Tripoli, BroCh. i. 379. ^uart% Aluminijere Tripoleeti, Hauy, iv. 467. Exter. Char.—This mineral is found maflave 3 is dull internally 3 has a coarfe earthy fraCture, fometimes flaty ; fragments blunt-edged. Colour yellowifh gray, and fometimes browifli red. Is foft and fomewhat friable 3 meagre to the feel, but does not adhere to the tongue. Chem. Char.—It is almofl infufible before the blow- pipev. MINE R pipe. It melts with borax without frothing up. It does not form a pafte with water. Conjlituent Parts. Haafle. Silica, 90 Alumina, Oxide of iron, 3 100 Localities, &c.—This fubftance was formerly brought to Europe from Tripoli; hence the name; but it lias fince been found in many other places, as in Bararia, Saxony, and Bohemia; in Ruffia and in England. It is found in the neighbourhoud of bafalts, fometimes forming veins; at Potfchappel it is difpofed in beds among the ftrata of coal, and near thofe places where ft rata of coal have been on fire. Ufes.—Tripoli is employed in poliftiing metals, pre¬ cious ftones, and glafles for optical inflruments. 8. Species. Fuoatsone. Exter. Char.—This mineral has been found in tu- berofe porous maffes; it is dull, has an earthy fra&ure, and blunt-edged fragments. The colour is yellowith gray or grayilh white. It is foft and brittle ; rough to the feel, and gives out a creaking found. It is very light, from which it has its name. Localities, &c.—Has been only found at St Omers near Paris. 9. Species. Alum Stone. La Pierre Alumineufe, Broch. i, 381. Exter. Char.—This ftone is found maffive ; is ge¬ nerally dull, rarely a little glimmering; frafture un¬ even, fometimes. fplintery ; fragments not very {harp edged. Colour grayifn or yellowifh white : it is foft, and fometimes fereihard ; ftains a little, and adheres to the tongue. Chem. Char.—This mineral does not effervefce with acids; but after being heated and diffolved in water, it affords alum. According to Bergman it contains 43 of fulphur, 35 of alumina, and 22 of filica ; but the fol¬ lowing is the refult of Vauquelin’s analyfis. Conjlituent Parts. Alumina, 43-92 Silica, 24. Sulphurous acid, 25. Sulphate of potalh, 3.08 Water, 4. 100.00 Localities, &c.—This mineral has been long known under the name of the Jlone of Tolfa, from the name of the place wrhere it is found near Rome, and where it forms a mountain which is traverfed by veins of whitifli gray rjuartz. It is from this ftone that the Roman alum, fo celebrated in commerce, is mahufaftured ; and it has 2 A L O G Y. been fuppofed that the excellence of the alum may be owing to the mineral containing within itfelf all the in¬ gredients neceifary in the formation of that triple fait. 10. Species. Aluminous Schistus. Tliis is divided into two varieties or fubfpecics; 1. common ; and 2. finning. Subfpecies 1. Common Aluminous Schistus. Zf Schijle Alumineux, Brocb. i. 386. Exter. Char.—1 his mineral is found in mafies, w hich often contain pieces of a globular form. It is fome¬ times glimmering, and fometimes dull; fracture com¬ monly fiaty, and fometimes a little earthy ; fragments in tables; ftreak the fame as the colour of the mineral, a little fiiining. Colour grayifii black or brownifh ; is foft; meagre to the feel, and eafily frangible. Chem. Char.—When expofed to the air for fome time it feparates, and yields alum by lixiviation. Localities, &cc.—Aluminous fchiftus is abundant in Saxony, Bohemia, France, England, and fome parts of Scotland. It is difpofed in beds among ftratiform rocks, and in tranfition rocks, and it is often traverfed bv veins of quartz. Being mixed vrith pyrites, the decom- pofition is thus promoted when expofed to the air. Wes-—This mineral is dug out for the purpofe of ex- tra&ing alum, firft by expofing it to the air or heat, and then by lixiviation. Subfpecies 2. Shining Aluminous Schistus. Le Schijie Alumineux Eclatant, Broch. i. 388. Exter. Char.—This mineral approaches very nearly to the former in molt of its chara&ers, but in the di¬ rection of its principal fracture the external furface is Imooth ; luftre Ihining, or refplendent, refinous, and even fomewhat metallic ; in the oppofite directions it is dull. Fracture commonly flaty, and fomewhat curved; fragments in tables. Colour intermediate between bluifii and grayilh black, and fometimes iron black. Colours in the rents iridefcent. In other characters and circumltances it refembles the former. 11. Species. Bituminous Schistus. Le Schijie Bitumineux, Broch. i. 289. Bituminous Shale, Kirw. i. 183. Exter. Char.—This mineral is found maflive; lufire glimmering ; fraCture molt commonly thin, rarely thick ; fragments in the form of tables, fometimes tra¬ pezoidal. Colour brownilh black, fometimes gray, or blackifir brown ; foft, and eafily frangible ; adheres fiightly to the tongue ; Itreak finning ; feels greafy. Chem. Char.—When placed on burning coals it gives out a pale flame with a fulphureous odour, becomes white, and lofes a good deal of its weight. Localities, &c.—This mineral is peculiar to coal countries, which it always accompanies, and alternates with Part I. Claffifica- with flaty clay and coal. It is not unfrequent in Bohe- tion. m;a> Poland, England, and Scotland. i2. Species. Drawing Slate. Black Chalk, Kir wan, i. 195. Le Schifte a Dejfiner, Broch. i. 391. Argile Schijleufe Graphique, Haiiy, iv. 447. Exter. Char.—This mineral is found maflive, ufually dull; but in the direftion of the principal fracture a little glimmering •, fracture in certain directions curved flaty ; in others fine grained earthy j fragments fplin- tery or tabular. Colour grayilh or bluifh black •, opaque j ftains black-, foft ; meagre to the feel. Chetn. Char.—Before the blow-pipe it becomes co¬ vered with a kind of varnilh. Conjlltuent Parts. Wiegleb. Silica 64.50 Alumina 11 *25 Carbone II. Oxide of iron 2.75 Water 7.50 Lofs 3. IC0.00 Localities, Sic.—-Drawing flate frequently accompa¬ nies aluminous fchitlus. It forms along with it beds which are fubordinate to clay flate. It is found in Ita¬ ly, where it is an obje6t of commerce. It is alfo found in Spain, France, and fome parts of Scotland. Cf/es.—As its name indicates, it is employed like black chalk in drawing. 13. Species. Whet Slate. •iLovacitlite, Kirw. i. 238. Le Schi/le a Aiguifer, Bro¬ ch ant, i. 3 91 • Argile Schifleufe Novaculaire, Hairy, iv. 448. Exter. Char.—This mineral is found maflive 5 is Icarcely glimmering 5 fradture in large maflfes fiaty, in fmali pieces fplintery ; fragments tabular. Colour commonly greenifli gray, or fmoke grav, Tometimes mountain green : tranflucent at the edges $ femihard, but varying between hard and foft ; rather eaiily frangible ; ftreak grayifli white ; feels greafy ; does not adhere to the tongue. Specific gravity 2.722. Chetn. Char.—Does not effervefce with acids, and is infulible before the blow-pipe. localities, &c.—Whet flate is found in primitive mountains, wrhere it forms beds which are fubordinate to clay flate. It was originally brought from the Le¬ vant 5 but has fince been difcovered in Bohemia, Saxo¬ ny, in Bayreuth, wdiere it is wrought, and in Siberia. An efflorefcence has been obferved on the furface, which is found to be fuluhate of magnefia -, from which it is naturally fuppofed that the bafe of that fait forms one of its conflituent parts. Pfes.—Whet flate, as its name imports, is cut and polilhed for the purpofe of fliarpening knives and other Vol. XIV. Part I. 185 reduced to powder, is employed in Arg:llace- cus i.enus. 14. Species. Clay Slate. Argillite, or Argillaceous Sc hi/1 us, or Slate, Kirwan, i. 234. Le Schifle Argilleux, Brochant, i. 395. Ar¬ gile Schijleufe Tegulaire, Haiiy, iv. 447. Exter. Char.— Clay flate is found maflive, or difle- minated, or in rounded pieces ; internally it is a little fliining or glimmering j rarely dull ', the more the flruc- ture is foliated, the greater is its luftre. Lullre fome- times filky, pearly, or femimetallic. Fra&ure more or leis flaty, fometimes curved and w-aved, fometimes earthy or fplintery ; fragments tabular, rarely fplintery $ fometimes cubic or rhomboidal. Colour chiefly gray of various fhadesj but fometimes it is reddiflt, brownilh, or yellowifh, or reddifli brown. Different colours are fo difpofed as to appear ftriped, waved, fpotted, or dendiitic. It is in general foft ; fometimes femihard, le£Hle, and eafily frangible. Gives a grayifli white ftreak $ feels greafy. Spec. grav. 2.67 to 2.88. According to Kirwan, clay flate is compofed of filica, alumina, lime, magnefia, and iron, with fome bitumi¬ nous particles. localities, &c.—Clay flate belongs equally to the primitive, tranfition, and ftratiform rocks, and frequently forms entire mountains. Primitive clay flate is fome¬ times mixed with quartz, mica, hornblende, garnets, limeftone, pyrites, cinnabar as at Idria ; in general it abounds with metallic ores, either in veins or in beds. Clay flate is very abundant in mod countries j it is not unfrequent in many parts of Scotland* but the flate of Eafdale, and the contiguous iflands on the welt coaft, has long maintained a decided fuperiority and preference to all others in this coun¬ try. LJfes.—Clay flate^ is in extenfive ufe for covering houfes, and then it is known in this country by the Angle word fate. It is alfo employed in large plates for writing on, or tracing chara£lers that are aftenvards to be effaced. 15. Species. Lefidolite. Id. Kirwan, i. 208. Id. Hairy, iv. 375. Lo Lcpido- lithe, Brochant, i. 399. ' Exter. Char.—Lepidolite is found maflive, and diffe- minated in fmali plates, which might be taken for mi¬ ca. It is ufually glimmering, rarely ftiining. Luftre femimetallic. Frafture fine grained uneven, rarely fo¬ liated. Fragments blunt edged. Colour lilac blue, grayifti and reddiftt browm j tranf¬ lucent. Semihard j fometimes foft 4 eafily frangible ; and feels meagre. Is eafily fcraped wfith the knife j but is with difficulty reduced to powder by trituration. The powder rubbed between the fingers has a greafy feel. Spec. grav. 2.816 to 2.854. Chem. Char.—Froths up under the blow-pipe, and melts into a tranfparent colourlefs globule j but with the addition of a little nitre it becomes vio¬ let. A a / Con/lituent mineralogy. inftrumentsj and, polilhing fteel. | 186 Argillace¬ ous genus. MINE R Silica Alumina Potafh Fluate of lime Oxide of iron and manganefe Water and lofs Conftitucnt Farts. Klaproth. 54-5 58.25 4* •75 2.5 Vauqr.elin. 54 20 18 4 1 100.00 100 Localities, &c.—This mineral was firft difcovered in the mountain Gradilko near Rofena in Moravia, where it is found in confiderable maffes included in blocks of granite. It is found alfo in Sweden. Sometimes it is dilfeminated in quartz rock. The name, from “ a fcale,” is derived from its fcaly ftrudlure. Lepidolite was at firft taken for fluate of lime or zeolite. A red coloured variety ol fchorlite was alfo fuppofed to be cryftallized lepidolite. 16. Species. Mica. Id. Kirw. i. 21. Id. Broch. i. 402. Id. Hauy, iii. 208. Exter. Char.—Mica is moft commonly difleminated in thin tables, rarely maflive or cryftallized. The pri¬ mitive form of its cryftals is a rectangular prifm, whofe bafes are rhombs with angles of 120° and 6o° j the integrant molecule is the fame. The ufual forms of its cryftals are, a fix-fided table with equal angles, fometimes very thick, which produces a fix-fided prifm, and the want of two of the faces produces the table with four rhomboidal faces; but the moft common form of mica is in thin plates or fcales of no determi¬ nate figure. The lateral faces of the bafes of the ta¬ bles are fmooth and refplendent j luftre metallic j frac¬ ture foliated, fometimes curved or waved, and fometimes radiated •, fragments in the form of plates. Colour ufually gray, afh, yellowilh, greenifh, and blackilh gray ; in thin plates femitranfparent, or even tranfparent ; otherwife, only tranflucent on the edges j femihard, very eafily frangible j flexible and elaftic. Sp. grav. 2.79 to 2.93. Fhyfical Char.—Mica rubbed on Spanilh wax com¬ municates to it negative eleftricity. Chicm. -Before the blow-pipe it is with dif¬ ficulty fufible into a whitifh gray or green enamel. Black mica yields a black enamel, which is attraded by the magnet. ConJUtucnt Parts. Vauquelin. Silica Alumina Lime Magnefia Oxide of iron Lofs '•33 *•35 7- 5-32 Bergman. IVlufcovy glafs. 40 45 5 9 Kirwan. Colourlefs Mica. 38 28 20 H 100.00 too 100 A L O G Y. Part I. Localities, Sic.—Mica is one of the moft common Clafiiiica- minerals, forming one of the conftituent parts of gra- tion- nite, gneis, micaceous fchiftus, and other primitive rocks, v ^ and in feme of them fometimes forms particular fmall veins. Mica alfo enters into the compofition of ftrati- lorm rocks, as green ftone, balalt, wacken. Cat gold and cat filver are varieties of mica of a gold or filver colour, which have a confiderable luftre, but inferior to that of thefe metals. It may be eafily di- ftinguiflied by the ftreak, which in the mica affords a whitifh powder without any luftre. U/es—When mica is obtained in large and thin plates, it is employed as a fubftitute for glafs, and for. this purpofe it has been ufed for windows of men of war, as on account of its elafticity it is lei's fubjedt to be broken from the concuflion produced by the firing of cannon. 17. Species. Finite. Micarelle, Kirw. i. 212. La Finite, Broch. i. 456. Exter. Char.—This mineral has been ufually found cryftailized in fix-fided prifms, having all the lateral edges truncated, or only three alternating edges, or in four-fided rhomboidal prifms. The furfaces of the cry¬ ftals fmooth and a little glimmering j internally it is dull* fometimes a little Ibining in the crofs fradlure ; the fraclure is fine grained, uneven, or fmall conchoidalj fragments blunt-edged. Colour reddifh or blackilh brown; opaque 5 the brown variety is llightly tranfparent; fo loft as to be cut with a knjfe, when it becomes of a bluifli black; powder bright gray ; adheres a little to the tongue 5 feels greafy ; fp. grav. 2.98. Conjlituent Parts. Klaproth. Alumina 63.75 Silica 29.50 Oxide of iron 6.75 100.00 localities, Sic.—Finite is found only near Schneeberg in Saxony, in the mine called Pini; hence its name. It is accompanied by quartz, feldfpar and mica, which conftitute a fmall grained granite. 18. Species. Potstone. Id. Kirw. i. 155. La Pierre Ollaire, Broch. i. 405. Talc Ollaire, Hauy, iii. 257. Exter. Char.—Potftone is found maflive ; internally it is dull, fometimes glimmering or a little ftiining, pearly ; fra&ure curved flaty, rarely foliated or wa¬ ved ; fragments blunt edged, in the form of tables or fcales. Colour greenilh gray, fometimes reddifh or yellow- ifh ; opaque, rarely tranflucent on the edges ; foft, fec- tile, and mild ; feels greafy ; by being breathed upon it emits the argillaceous fmell. Spec. grav. 2,76 to 2.86. Chem. Char.—Infufible before the blow-pipe; fome varieties abforb a little water. Conjlituent. Part I. Glaflificft- _ tion. Coajiituent Paris. ^L'' Y Silica Magnefia Alumina Lime 41 Oxide of iron 15.02 Fluoric acid ? .41 Lofs .84 100.CO Localities^ &c.—Potftone is found at Chiavenna, in the Vaiteline, from which the fpecimen above analyzed was obtained ; at Como, in Switzerland, hence called Como Jlone. It is alfo found in Saxony, Hungary, and on the banks of Loch Fine oppofite to Inverary in Scot¬ land. Potftone forms entire beds, and is ufually ac¬ companied by ferpentine, or it is in nefts 5 it is rarely pure, but mixed v/ith chlorite, talc, afbeftus, &c. XJfes.—On account of the refra&ory nature of this ftone, it is employed in the conftruftion of furnaces where gifeat heat is required ; and as it may be cut or turned on the lathe, it has been formed into uteniils for the kitchen, and hence the name potjlone. 19. Species. Chlorite. Id. Kirw. i. 147. La Chlorite, Broch. i. 408. laic Chlorite, Hauy, iii. 257. Chlorite is divided into four fubfpecies : 1. earthy j 2. common ; 3. foliated 5 4. fchiftofe or flaty. Subfpecies 1. Earthy Chlorite. Extcr. Char.—This mineral is compofed of fmall, fcaly, thin, and (lightly glimmering particles, cohering together, rarely in the form of pow'der. Colour intermediate between mountain green and dark leek green •, fometimes brownilh •, does not ftain ; feels greafy, but does not adhere to the tongue •, gives an earthy frnell by breathing on it. Chem. Char.—Melts before the blow-pipe into a gray or black enamel. Conjlituent Parts. Vauquelin. Silica 26. Alumina 18.50 Magnefia 8. Muriate of foda 2. Oxide of iron 43. Water 2. Lofs .50 100.00 Localities, &c.—Earthy chlorite is always found in primitive mountains, forming beds which are fubordi- nate to clay Hate. It is found in Saxony, Switzerland, Savoy, and in Scotland. Subfpecies 2. Common Chlorite. Exter. Char.—This is found maflive and difleminated, or in thin fuperficial layers on other ftones; internal luftre (lightly glimmering, refinous j fra&ure earthy, or 187 foliated ; fragments blunt-edged ; foft, fometimes feral- Argillace- j ^ ' D o'' ous genus. Colour fimilar to the former, and fometimes grayifli v white ; is opaque, eafily frangible 5 gives a light green ftreak without luftre. Conjlituent Parts. Hoepfner. Silica 41 Magnefia 39 Alumina 6 Lime 1 Oxide of iron 10 Lofs 3 100 Localities, &c.—Common chlorite is found in the fame places with the former, and indeed it is fuppofed to be earthy chlorite indurated. At Altenberg in Saxony, it is mixed with pyrites of copper and arienic, and common hornblende. Subfpecies 3. Foliated Chlorite. Exter. Char.—This variety is found maflive, diffemi- nated, and cryftallized in the form of a fix-fided table fomewhat elongated ; feveral of thefe tables being uni¬ ted together, frequently form globular, kidney-form, or botryoidal groups. External luttre glimmering or weakly ftiining •, internal ihining, refinous, or ptaily j fra&ure foliated 5 folia curved ; cleavage ample 5 frag¬ ments in tables. Colour intermediate berween leek and dark green ; opaque, or tranflucent at the edges 5 ftreak light green; is foft, feftile, eafily frangible, and feels a little greafy. Conjlituent Parts. Lampadius. Silica 35. Magnefia 29.9 Alumina • 18. Oxide of iron 9.7 Water 2.7 Lofs 4.7 100.0 Localities, &c.—This mineral has been only found on St Gothard in Switzerland ; it lines the fides of a vein which traverfes micaceous fchiftus. It is accom¬ panied by cryftals of green mica, adularia, and qussru. Brochant fiiggefts that foliated chlorite may perhaps be nothing elfe than a cryftallized mica. Subfpecies 4. Schistose Chlorite. Exter. Char.—This variety is found maflive ; inter¬ nal luftre weakly Ihining, fometimes Ihining, refinous} fradure curved flaty, fometimes waved, or a little fplintery ; fragments tabular. Colour green ; is foft, fertile, and eafily frangible ; ftreak light green; feels a little greafy ; gives the earthy fmell by breathing. Localities, &c.-—Slaty chlorite is found in Norway, Sweden, Switzerland, in different parts of Scotland, as on the banks of Loch Lomond, and in the iflands of A a 2 Bute mineralogy. Wiegleb. 38.12 38-54 6.66 188 A roil] ace- Bute and Arran. Sometimes it forms very extenfive .ou., ^m.s ^ ^ecjs jn mountains of clay Hate, to which it is fubordi- nate; and it is frequently accompanied by garnets and magnetic iron, cryltallized in oftahedrons. The name is derived irorrv the Greek word which lignities green. 20. Species. Hornblende. This is divided into four fubfpecies; i. common j 2. bafaltic ", 3. labradore j and 4. fchiftofe. Subfpecies 1. Common Hornblende. Hornblende, Kirvv. i. 163* Hornblende Commune, Broch. i. 415- Hmphibole, Hauy, iii. 58. Exter. Char.—Hornblende is found mafiive or diffe- .irsinated, and fometimes cryftallized. The forms are a four-fided prifm, of which the acute oppofite lateral edges are ftrongly truncated •, a fix-fided prifm with four broad and two narrow faces, llightly truncated on the lateral edges; a fimilar fix-fided prifm, fhort, and having the extremities bevelled ; an eight-fided prifm, having at its extremities, a convex bevelment. Some¬ times the cryftals are acicular and in groups ; internal luftre. fhining,. vitreous, or pearly ; frafture foliated, iometimes radiated, and fometimes fibrous; furface of the frafture longitudinally ftreaked ; fragments (harp- edged, lometimes rhomboidal. Colour deep black, greenifir black, or greenifh gray ; ufualiy opaque. The green varieties tranflucent at the edges. Soft or femihard ; not eafily frangible ; ftreak greenifli gray ; gives an earthy fmell by breathing on it : fp. grav. 3.6 to 3.88. Chem. Char Before the blow-pipe it melts eafi’y into a grayifh black glafs. Conjlituent Parts. Kirwan. Hermann. Silica. 37 37 Alumina 22 27 Magnefia 16 q Lime 2 5 Oxide of iron 2q 2 C Lofs 3 100 100 Localities, &c.—Hornblende is one of the confiituent parts of primitive rocks, as in fienite; and it feems alfo to be an accidental fubftance, as in gneis, primitive limeftorie, porphyries, and micaceous fchiftus. It is found alfo in maffes or entire beds, as in Saxony ; and is very common in mod: countries, as in Norway, Hun¬ gary, and Britain. Ufes.—Sometimes employed as a flux for ores of iron. Subfpecies 2. Basaltic Hornblende. Bafahirre, Kirw. i. 219. Hornblende Bafallique, Roch. i. 424. Exter. Char.—This mineral is mod frequently found cryftallized in equal fix-fided prifms, varioufly modified »r with equal fides ; having two narrow and four broad ; or four narrow and two broad; or three broad and three narrow alternately. The cryftals are imbedded, infulated, or grouped. Surface fmooth, (Inning; in¬ ternal luftre ^refplendent, in the crofs fracture weakly Part I. (hinmg, vitreous ; fra&ure foliated ; crofs fiaaure fmall Claftifica- grained, uneven, or conchoidal. Fragments nearly tion- rhomboidal. v ‘ Colour velvet black, and fometimes with a (hade of green; opaque; ftreak grayifti white; femihard; fearthy imell by expiration. Spec. grav. 3.22 to 3.33. Chem. Char.—Before the blow-pipe melts lefs eafily than the preceding, into a black glafs. Conjlituent Parts. Bergman. Silica 38 Alumina 27 Lime 4 Magnefia i Oxide of iron 9 Lofs 1 - 100 Localities, See.—This mineral, as its name imports, is uluaily found in bafalt. It is alfo met with in wacken, and in the lava of Vefuvius. It it not un¬ common in the baialtic rocks of Silefia, Saxony, and Bohemia, as well as in thole of this country. As it is lefs liable to decompofition than the rocks which con¬ tain it, detached cryftals are frequently found among decayed bafalt. a Subfpecies 3, Labrador^ Hornblende. La Hornblende du Labrador, Broch. i. 419. Exter. Char.—This mineral is found maftive, difle- minated, in rounded pieces, and very rarely cryftallized in four-fided redlangular prifms. Internal luftre (bill¬ ing, fomewhat metallic; frafture foliated, fometimes curved. Colour blackifli green, or greenifh black ; fome¬ times bronze yellow ; fcarcely tranflucent at the edges; femihard; not difficultly frangible;, 'ftreak greenifli. Spec. grav. 3.38. Localities, &c.—This mineral is found in the ifland of St Paul on the Labradore coaft, but nothing is known of the nature of its repofitory. Subfpecies 4. Schistose Hornblende. Id. Kirw. i. 222. La Hornblende Schijleufe, Broch. i. 428. Exter. Char.—This variety is found maflive ; internal luftre weakly fliining; fra£lure in mafl'es flaty ; in fmall pieces radiated, femetimes fibrous ; fragments in plates. Colour greenifli, or grayifli black ; opaque ; femihard; ftreak greenifli gray; rather difficultly frangible; breath¬ ed on, gives the earthy fmell. Localities, &c.—Schiftofe hornblende forms exten¬ five beds in primitive mountains, to which it is fuhordi- nate. It feems to be common hornblende more or lefs mixed with quartz. It is found in Bohemia, Norway, Sweden, in the rile of Skye, and other places of Scot¬ land. 21. Species. Basalt. Figurate Trap, Trap,WhinJlone, &c. Kirw. 1.225.—2q3. Le Bafalte, Broch. i. 430. La Liihoide Prijmatique, Hauy, iv. 474. MINERALOGY. Exier. MINERALOGY. Fart I. Claffifica- Exter>. Char.—Bafalt forms entire mountains, in the ticn. neighbourhood of which it is found in rounded pieces, ' v or in large globular maffes ; internally it is dull} fome- times glimmering from a mixture of hornblende •, frac¬ ture uneven, fometimes fine fplintery or conchoidal ; fragments not very (harp-edged. It is mod frequently in diftinft concretions, which are prifmatic or columnar, more or lefs regular ; fometimes alfo in globular diftindt concretions. Colour grayilh or bluifh black, fometimes brownifh on the furface •, opaque •, femihard 5 brittle, and very difficultly frangible \ ftreak light a(h gray i gives a ringing found under the hammer. Spec. gray. 2.86 to 3. Chem. Char Melts very eafily before the blow¬ pipe into an opaque black glafs which a£ls on the magnet. PhyfiCal Char.—Many bafalts affedt the magnetic needle, reverfing the poles when it is brought near them. This is afcribed to the great proportion of iron which enters into their compofition. Localities, &c.—Bafalt is not uncommon in every part of the globe, and in many places it is very abun¬ dant. It is found in regular columns in feveral of the Hebrides on the weft coaft of Scotland, as in Cannay, Eigg, the Schant ifles, but particularly beautiful in Staf- fa. Pretty regular columns are obferved alfo at Dunbar, and on the fouth-weft fide of Arthur’s-feat near Edin¬ burgh ) but the Giant’s caufeway and the rocks about Fairhead oil the north coaft of Ireland, exhibit the fineft and moft extenftve ranges of columnar bafalt in the world. Bafalt, befides being in the columnar form, is of¬ ten difpofed in beds and veins } both of w-hich are very common in different places in Scotland, particularly on the weflern coaft, and in the weftern iflands. See Wil~ Harris's Mineral Kingdom. No fubjedt, in geological fpeculation, has produced more controverfial difcuftion than the origin of bafalt j one party afferting that it is the effedt of fufton, while another contends that it rnuft have been depofited from an aqueous folution. Our limits preclude us even from barely ftating the arguments which have been propofed by naturalifts in fupport of the theories which different parties have embraced. For an account of home of them, fee Geology Index; and for the conftituent parts of bafalt, and fome other fadls connedted with its natural hiftory, fee Basalt. Ufes Bafalt is fometimes employed as a touchftone, as a flux for ores of iron, and in the nianufadture of common bottles. It is alfo employed for millftones. The ancients employed it in fculpture, for it would ap¬ pear that fome of their vafes and ftatues were formed of it. 22. Species. WACKEN. Id. Kirw. i. 223. La Wakke, Broch. i. 434. Exter. Char.—Wacken is found maflive ; it is fre¬ quently veficular, and the cavities are often filled with other minerals ; internal appearance dull •, fradture even or earthy ; fragments rather blunt edged. Colour grsyith green, grayifh black, reddifh, or brownifh j opaque '} ftreak a little (hining } foft or fe¬ mihard ; eafily frangible ; feels a little greafy. Spec, grav. 2.53 to 2.89. Chem. Char.—Fufible like bafalt. Localities, &c.—Wacken belongs to the ftratiform rocks. It contains fometimes petrified wood, and the bones of animals. It conftitutes beds fometimes in the middle of bafalt, but is oftener in the form of veins, and is the bafts of amygdaloid, the cavities of wdiich are filled with green earth, calcareous fpar, &c. Wack¬ en is met with in Saxony, Bohemia, Sweden, and ma¬ ny places of Scotland. 23. Species. PhoNOLITE, or Clinhjlone. Id. Daubuiffon, Jour, de Phyf. lx. 74. Pierre Son- nan te, Broch. i. 437. Klingstein and Porphyrfchie- fer of the Germans^ Exter. Char.—This mineral is always found maflive-; internal lultre glimmering j fradture ftaty, fometimes uneven conchoidal j fragments (harp-edged ; compo- fed of diftindt concretions, which are either in the form, of tables, or are columnar, and fome what regularly grouped together. Colour gray, a(h, greenifh, or bluiih gray ; the co¬ lours fometimes have a dendritical appearance ; opaque, or tranflucent at the edges j femihard, or hard 5 not difficultly frangible j in thin plates it emits a found when ft ruck with a hammer, and hence its name. Spec. grav. 2.575. Chem. Char.—Melts before the blow-pipe into a co« lourlefs glafs. Conjlituent Parts. Klaproth. Bergman. Silica 57*25 58* Alumina 23-5 24-5 Lime _ 2.75 3.5 Oxide of iron 3.25 4.5' — — manganefe .25 Soda 8.1 6. Water 3. 2. Lofs 1.9 1.5 100.00 100.0 The ftone analyzed above by Bergman, was from Puy in Velay, in France, and is confidered by Dolo- mieu as volcanic. The other by Klaproth, is from Bohemia. Excepting the fmall proportion of manga¬ nefe detedfed in the latter, the coincidence of the two analyfes is very ftriking. Localities, &c.— Phonolite is not uncommon in many parts of the world. It is met with in Scotland, in the ifland of Lamlaffi near Arran j and it conftitutes the greater part of Traprene Law in Eaft Lothian 5 in both places it is columnar. 24. Species. Lava. Id. Kirw. i. 400. La Lave, Broch. i. 440. La Scori- fee, Haiiy, iv. 497. Exter. Char.—This mineral is generally of a porous textuje, with cavities of different fizes.j luftre glimmer¬ ing. xqo MINER Argiilace- Ing or ^ a little fliining, vitreous; frafture imperfeftly ouh gcims.^ cQ^choidal • fragments not very Qiarp-edged. Colour tilackilli gray, perfeft black, or brownifli black, iometimes greenilli, and rarely white; opaque j femihard ; brittle ; not difficultly frangible •, light. Chem. Char.—Lava is very fulible, and yields a corn- paid black glafs. Conjlituent Parts. Bergman. Silica 49 Alumina q e Lime 4 Oxide of iron 12 100 Localities^ &c.—Lava being a volcanic produft, is only found in the vicinity of volcanoes. Vfcs.—Lavas are employed for the purpofes of build- ing ; their lightnefs, arifing from the numerous cavities, renders them proper for the conftruilion of vaults. 25. Species. Greek Earth. Id.' Rirw. i. 196. La Terre Verte, Brochant, i. 445. 1 ale Chlorite Hographiquey Haiiy, iii. 2 $7. Exter. Char .—Green earth is found mnffive, or dif- feminated, or in fuperficial crufts on balls of agate ; internally it is dull; fraiture earthy j fragments biunt- edged.. \ L O G T. # Colour yellowifh wliite, fnovv white, fometimes red- difh j the particles have very little cohelion. Subfpecics. 2. Indurated Lithomarga. Exter. Char —This is alio found maftive or diftemi- natea^ is dull ) has a fine grained earthy fracture, fometimes concho'dal ; blunt-edged. Colour white, yeilowilh, or reddifn white ; brownifti red, and feveral (hades of yellow. Different colours are diipofed in ipots, veins, dots, ftripes. or clouds j opaque •, very loft; ftreak ftiining j adheres to the tongue j feels greafy. Chem. Char.—Infufible before the blow-pipe ; falls to pieces in water without forming a pafte. According to feme analyfes, it contains a large proportion of mag- nefia. Phii/ical Char.—Some varieties when rubbed with a feather in the dark, give a little light. Localities, &c.—Lithomarga or itone marrow, de¬ rives its name from its being found in nodules in amyg. daioid rocks 5 it occupies veins or fmall fiftures in por- Ptyiy, gueis, and ferpentine. It is found in Bohemia, barony, I ranee, England, and at the Giant’s caufeway in Ireland. A variety of lithomarga, which exhibits many fine colours, particularly violet or lavender blue is found in beds repofing on coal at Planitz, near Zwickau in Saxony. It has been called, from its beau¬ tiful appearance, wonder earth of Saxony (Terra mira- culofa.) Colour celadon green, or bJackifti green; opaque ; fort ; feels llightly greafy j adheres a littie to the tongue j ftreak weakly fhining. Chem. Char.—Before the blow-pipe it becomes black, but is infufible. It is not a&ed on by acids, and ab- forbs water. Conjlituent Parts. Klaproth. Silica Alumina j 2. Lime 2.e Magnefia or Oxide of iron j Water Lofs . 27. Species. Mountain or Rock Soap. Le Savon de Montague, Brochant, i. 453. Enter. Char.— This mineral is found maftive j is dull internally j has an earthy, and foiretimes an imper- fetfiy conchoidal fra&ure ; fragments blunt-edged. Colour brownifti black, fpotted ochrey yellow. O- paque ^ very foft; eafily frangible 5 ftreak ftiining, and refinous 5 ftains and ivrites on paper j feels greafy, and adheres ftrongly to the tongue. Localities, &c,—This mineral is rare 5 has been found at Olkutfch in Poland, and alfo, it is faid in England. 28. Species. Umber. 100.00 Localities, &c—Green earth is found at Verona, where it is wrought, and conftitutes an article of com¬ merce ; and it is met with in all amygdaloid rocks. Green earth is employed as a colouring mat¬ ter in painting. Exter. Char.—This mineral is found maftive j frac¬ ture conchoidal ; fragments blunt-edged, Colour brownifti, of various (hades j fbft $ adheres a little to the tongue, and has a meagre feel. Localities, &c.—Umber is found difpofed in beds, in the ifland of Cyprus j and it is employed as a pig¬ ment. 26. Species. Lithomarga. Id. Kirw. i. 187. La Moelle de Pierre, Brochant, i. 447. Slrgile Lithomarge, Haiiy, iv. 444. This is divided into two fubfpecies, chiefly diftin- guiftied by their cohelion. Thefe are, 1. friable : 2. indurated. Subfpecies 1. Friable Lithomarga. . Exter. Char.— l his is found maflive or difleminated • is flightly glimmering ; adheres ftrongly to the tongue; feels grealy. 0 29. Species. Yellow Earth. Id. Kirw. i. 194. La Terre Jaune, Broch. i. 433. Exter. Char.—Yellow earth is found maflive $ it is dull, or in the principal frabture, which is flaty, glim¬ mering j crofs frablure earthy j fragments very blutit- edged. , Colour ochrey yellow j very foft j ftreak ftiining: feels greafy, and adheres a little to the tongue. Localities, &.c.—-It has only been found in fmall beds in ftratified mountains, at Wehraw in Upper Lu- fatia, Part I. Claffifica- tion. 3 Part 1. MINER Claffifica- fatia, snd it is faid, in the cavities of gray wacken, and non. jn t^e figures of a fandftone rock. XJfcs. It is employed in the arts as a pigment. V. MAGNESIAN G ENUS. i. Species. Native Magnesia. Magnefie Native, Brochant, ii. 449. Ex ter. Char Native magnefia is found maffive, tu¬ berous or carious. Surface uneven and dull. Fradture flat, conchoidal, fplintery or earthy. Fragments lharp Colour yellowilh gray, with fpots and dendritic deli¬ neations of black or blackilh brown. Opaque, foft and eafily frangible. Feels greafy ; adheres to the tongue, and is rather light. Conjlituent Parts. Carbonic acid 51* Magnefia 47'4 A trace of iron Lofs 100.0 Localities, &c.—This mineral was difeovered by Dr Mitchell in a ferpentine rock at Roubfchitz in Mora- Viat A mineral in many refpefts fimilar to this has * Jour, de been analyzed by Giobert *. It was long known un- Phyf. lx. derthe name of porcelain earth, and was luccelslully 345’ employed in that manufadlure. Giobert fuppoies that the external characlers, and particularly the colours, ot the mineral found in Moravia, feem to indicate the exit- tence of other fubftances befide thofe detefted by Dr Mitchell’s analyfis. _ # , £xter. Char.—The mineral defenbed by Giobert is found maflive or in mammillary fragments, feme of which are tuberculated. Surface dull. Fradlure con¬ choidal or uneven. . Colour pure white. Opaque. Spec. grav. variable. Hard, fometimes foft. Feels greafy ; adheres (lightly to the tongue. The fofter varieties abforb water gree¬ dily and with a hifiing noife. Chem. Char.—Infufible before the blow-pipe. Conjlituent Parts. Magnefia 68. Carbonic acid 12. Silica 15-6 Sulphate of lime 1.6 Water 3* 100.2 Localities, &c —This mineral is found at Baudiffero, in a vein which traverfes a fteatitic rock of which the mountain is compofed. 2. Species. Bole. Id. Kirw. i. 190. Le Bol, Broch. i. 459. Argile Ochreufe, Hauy, 445* Exter. Char. Found maflive and diffeminated ; fur- face dull, fometimes a little glimmering ; fradure con¬ choidal j fragments (harp-edged. A L O G Y. 191 Colour yellovvifli brown or reddiih, with fpots and Magnefian dendritical figures of black j opaque, rarely tranflucent ._ gen"5, . at the edges} very foft j eafily frangible j adheres to the tongue ; feels greafy j ftreak (hining : fp. grav. I.4 to 2. Chem. Gfor.--Before the blow-pipe it becomes black or gray, and melts into a greenifh gray flag. Falls to pieces in water with a crackling noife, and without forming a pafte. Conjlituent Parts. Bergman. Silica 47- Alumina 19- Magnefia 6-2 Lime 5-4 Oxide of iron 5*4 Water i?- IOO.O. Localities, &c.—The chief places which yield bole' are the ifland of Lemnos, hence called Lemnian earth; Sienna in Italy, and Strigau in Silefia, in which latter place it is depofited on indurated clay , in Upper Lu- fatia it forms nefts in bafalt. Ufes.—Bole and fimilar earths were formerly employ¬ ed in medicine j it is now' only ufed in the preparation of colours. ClMOLITE. This is a mineral which in many of its chara&ers is clofely connected with the preceding. Exter. Char.—It is found maflive *, fraflure earthy uneven, or flaty ; colour grayilh white, pearl gray, and expofed for fome time to the air, reddifli j opaque ; does not itain j adheres ftrongly to the tongue ; is foft, and difficultly frangible : fp. grav. 2. Chem. Char.—Before the blow-pipe it becomes at firlt of a deep gray colour, but afterwards white. Conjlituent Parts. Klaproth. Silica 63. Alumina 23. Oxide of iron 1.25 Water 12. Lofs -75 100.00 Localities, &c.—This mineral was brought by Mr Hawkins from the ifland of Argentiers, formerly Cimolo, from whence it has its name. Olivier found a fimilar fubftance in the ifland of Milo, but which was very friable. JJfes.—This fubftance is employed in whitening wool¬ len fluffs. It is deferibed by Pliny under the name Cimolia, as being applied to the fame purpofe, and alfo as a medicine in his time. It is to be obferved that cimolite contains, according to the above analyixs, no magnefia. 3. Species. Sea froth. KeJfehilL Kirw. i. 144. L'Ecume de Mer, Broch. i. 462. Argile glaife, Hauy, iv. 443. Meerfchaum pf the Germans, Exter, 192 MINER ^genusT11 Exter. Char.—This mineral is found maffive, diffe- ■ » minated, or in fuperficial layers. Surface dull. Frafture fine earthy, fometimes flaty. Fragments (harp-edged. Colour yellowilh white. Opaque. Very foft. Eafily frangible. Streak (hining. Feels greafy j and adheres to the tongue. Sp. gr. 1.6 Chem. Char.—Infufible before the blow-pipe. Conflituent Parts. Klaproth. Silica Magnefia Lime Water Carbonic acid Lofs 50.5 17.Z5 41' 18.25 •5 39- u75 ConjHtuent Parts. Silica Alumina Lime Magnefia Oxide of iron Water Bergman. 5t.8 25- 3-3 •7 3-7 JSS IOO.CO A L O G Y. Part I. Ex ter. Char.—Steatites is found maflive, diffemina- Claflifica- ted, and cryftallized. Forms of the cryftals, a lix-fided tion prifm terminated by a fix fided pyramid 5 a re&angular and rhomboidal four-fided priim; and a double fix-fided pyramid. The cryftals are fmall, generally imbedded in the maffive variety j but they are very rare ; and it is iuppofed, with fome probability, that they are pfeudo- cryftals. Surface of the cryftals fmooth and (hining. Internally dull j fra&ure coarle fplintery, rarely earthy ordaty. Fragments blunt-edged. Colour greenilh, yellowifh, reddiffi or grayiffi. Co¬ lours fometimes mixed, and fpotted or dendritical. Tranflucent at the edges. Soft, fometimes friable. Streak (hining. Feels greafy. Sp. gr. 2.614. Chem. Otar.—-Iniufible before the blow-pipe j but becomes white and very hard. Localities, Sue.—Sea froth is found in Natolia, in the Crimea, in Spain and fome other places. It appears to be diftributed in low grounds in thin beds ‘7 and it is faid to be in the date of foft pafte which hardens in the air. U/es.—It is employed in Turkey, in the manufacture of the heads of tobacco pipes j and as a deterfive Tub- fiance, like fullers earth, by the Tartars. . Species. Fullers Earth. Id. Kirw. i. 184. La Terre a Foulon, Broch. i. 464. yirgile SmeBique, Haiiy, iv. 443. Exter. Char.—Found maffive. Surface dull. Frac¬ ture fine-grained earthy, conchoidal or (laty. Frag¬ ments blunt-edg'ed. Colour olive green, yellowiffi or reddiffi. Colours fometimes mixed and difpofed in fpots or ftripes ; opake j foft ©r friable. Streak fomewhat ffiining. Sometimes adheres to the tongue $ feels greafy. Chem. Char.—Does not effervefee with acids j melts into a brown fpongy clay j falls to pieces In water with- ouLforming a pafte, and does not froth up like foap. Conftituent Parts. Klaproth. From Bayreuth,. Silica Magnefia Alumina Oxide of iron Water Lofs From Cornwall. 48. 20.5 14. J. I5-5 59-5 3°-5 2.3 5-5 Localities, &c.—Steatites is found in primitive moun¬ tains, forming beds and veins in ferpentine rocks j fome¬ times in metallic veins, as in the tin mines near Frey- berg. It is alfo imbedded in wacken, as in the ifland of Skye, and in veins of ferpentine at Portfoy in Scot¬ land. Steatites is alfo found in Cornwall in England, and in Sweden, Norway, Saxony, and France. XJfes.—Steatites is fometimes employed in the manu¬ facture of porcelain, and fome varieties of it anfwer for the fame purpofe as fullers earth. 6. Species. Figure stone. La Pierre a Sculpture, Broch. i. 451. Le Bildjlein of the Germans. Exter. Char.—This mineral is found maffive. Inter¬ nal luftre fometimes glimmering, fometimes dull, greafy. TraCture flaty $ crofs fraCture fplintery. Colour, olive green, greeniffi gray, yellowiffi brown, fometimes reddiffi, and veined. Semitranfparent, or tranflucent at the edges, and fometimes opake. Soft j feCtile j feels greafy. Sp. gr. 2.78 to 2.81. Localities, ^.c.—Fullers earth is found in Sweden, “Saxony, and France, forming beds j but the beft fullers earth is found between ftrata of fandftone in Hampffiire and fome other places of England. Vfes.—Fullers earth is of great importance in woollen manufactures, on account of its deterfive properties. It is extenfively employed in the procefs of fulling or clean¬ ing woollen fluffs from greafy matters. 5. Species. Steatites. La Pierre de Lard, ou Steatite, Broch. i. 474. Semi- indurated and Foliated Steatites, Kirw. i. 151, and 154. Talc Steatite, Hauy, iii. 256. 2 Silica Alumina Lime Oxide of iron W ater Lofs Conjlituent Parts. Klaproth. Tranflucent. Opaque Figure ftsne. 54. 62. 36. 24. •75 5-5 3-75 25 Localities, &c.—This mineral is broupht from China, and is always . ur into various, often lingular, figures j and hence the name UUiJtein, or jculpture jione. 7. Species. Part I. MINERALOGY. i93 7. Species. Nephrite, or JrJe. Jade, Kirvr. i. 171. Le Nephrite, Broch. i.467. Haiiy, iv. 368. This fpecies is divided into two lubfpecies. Subfpecies 1. Common Nephrite. cutting inftruments by the natives of thofe countries Magnc-fua where iron is little known. gemib. Jai?ei g. Species. SERPENTINE. Id. Kirw. i. 156. La Serpentine, Brochant, i. 481. Roche Serpentineufe, Hatty, iv. 436. This fpecies is divided into two fubfpecies. Exter. Char.—This variety is found maffive, diffemi- nated, or in rounded pieces. The lurface is fmooth, glimmering, and un&uous; internally it is dull; frac¬ ture llaty or coarfe fplintery, rarely fibrous ; fragments (harp-edged. Colour leek green, fometimes inclining to blue, green- i(h or yellowifli white 5 tranllucent, fometimes only at the edges 5 hard •, very difficultly frangible ; feels greafy. Sp. grav. 2.97 to 4.38. Chem. Char.—Fulible before the blow-pipe, and melts into a femitranfparent white glafs. ConJUtuent Parts. Hoepfner. Subfpecies 1. Common Serpentine. Exter. Char.—This mineral is found maffive, very rarely difleminated; internal lufire (lightly glimmer¬ ing, or only dull; frafture fplintery, or fine grained un¬ even, rarely conchoidal 5 fragments (harp-edged. Colour blackiffi green, leek green, grayiffi, greeniffi, or bluiffi gray ; in fome varieties, red ot various ffiades. Thefe colours are mixed and difpofed in fpots, ftripes, veins, and dots. Tranflucent at the edges, or opaque ; femihard; not difficultly frangible; feels greafy. Spec. grav. 2.57 to 2.7. Chem. Char.—Infufible before the blow-pipe. Silica 47 Magnelia 38 Alumina 4 Lime 2 Oxide of iron 9 100 Localities, Szc.—The repofitory of nephrite is un¬ known. It was originally brought from the Levant, Eaft Indies, and China. It is found alfo in the Alps, in Switzerland, and in Piedmont. The water-worn pebbles which are collefted on the banks of the lake of Geneva, often contain this mineral. It is found alfo in a fimilar form at a particular place on the (liores of Iona, one of the Hebrides, in Scotland. Ufes.—Oriental nephrite, long known under the name of Jade, is held in confiderable eftimation on ac¬ count of its hardnefs and tenacity. It is employed by the Turks for the handles of knives and fabres, and frequently by others for various ornamental pur- pofes. The property of curing difeafes of the kidneys is aferibed to this mineral by ancient authors, and hence the name nephritic Jlone, or nephrite. Subfpecies 2. Axe Stone. La Pierre de hache, Brochant, i. 470. Beiljlein of the Germans. Exter. Char.—This is alfo found maffive, but mod frequently in rounded pieces ; luftre glimmering, or weakly (hining; fradure in large mafles, flaty ; in fmall, fplintery ; fragments in the form of plates. Colour deep meadow-green, fometimes olive green 5 tranflucent •, femihard, and fometimes hard ; not very brittle ; more difficultly frangible than the preceding- variety. Localities, Szc.—This mineral is found in China, the Eaft Indies, and South America, on the banks of the river Amazons. It is found alfo in fome of the i(lands in the South fea, as well as in Corfica, Switzer¬ land and Saxony. li/es.—Axe (lone is employed as hatchets and other ^ VOli. XIV. Part I. Conjl intent Parts. Kir wan. Silica 45 Alumina 18 Magnefia 22 Oxide of iron 3 Water 12 100 Localities, &c.—Serpentine belongs to the clafs of primitive rocks, and it conftitutes entire mountains. It is found in Saxony, Bohemia, Italy, Corfica, and Siberia 5 in Cornwall in England, wffiere it contains native copper, and at Poitfoy in the north of Scotland, where it is knowm by the name of Portfoy marble. Common ferpentine is frequently mixed with fteatites, talc, afbeftus, garnets, and magnetic iron, but never contains limeftone. This variety, in the language of Werner, is of a newer formation than the following fubfpecies. Vfes.—Serpentine is fufceptible of a fine poliffi 5 on account of which, and its beautiful colours, it is em¬ ployed for various ornamental purpofes. Subfpecies 2. Precious Serpentine. Exter. Char.—This alfo is' found maffive or difle¬ minated ; internal luftre glimmering, rarely weakly, (hining, refinous; fra&ure conchoidal, even or fplintery j fragments (harp edged. Colour dark leek green of various (hades j tranf¬ lucent •, femi-hard j eafily frangible; feels (lightly greafy. Localities, &c.—This fubfpecies is found in fimilar places with the preceding. It is diftinguiffied from it by being always connedled with limeftone. The (tones known in Italy by the name of verde di Prato, verde Antico, verde di Su%a, which are very often accompa¬ nied by limeftone, may be included under precious ferpentine. 9. Species. Schiller Stone. Schillerfpath, or Spath Chatoyant, Brochant, i. 421. Schiller Spar, Kirw. 221. B b Exter. 194 JViagnefian genus. M I N E K A L O G Y. Part T Exief. Char.—This ftiineral is found diffemmated in thin plates, which affume a cryftallized form, as in that of a table with fix fides, or a Ihort fix-fided prifm j lufire fhining, fometimes refplendent, and femi-metallic 5 frac¬ ture foliated. Colour olive green, bronze yellow, or filvery white $ foft •, eafily frangible •, fomewhat elaftic •, feels greafy. Chent. Char.—Before the blow-pipe it melts with borax* into a glafs which becomes opaque on cooling. Localities, See.—Common talc is always found in Claffifica- ferpentlne rocks, where it accompanies aftynolite, flea-. tl°n- , tites, and indurated talc. What is called Venetian talc is brought from the mountains of Saitzburg and the Tyrol. XJfes.—Taic is fometimes employed as a fubftitute for chalk, enters into the compolition of crayons, and is mixed with fome kinds of paint. Subfpecies 3. 'Indurated Talc. ConJHtuent Parts. Heyer. Silica 52. Alumina 23-33 Magnefia 6. - Lime 7. Oxide of iron 11.67 100.00 Localities, Stc.—Schiller ftone is found at Bafta in the Hartz, in Moravia, the Tyrol, in Corfica, and in Corn¬ wall. It is ufually imbedded in Terpentine, and is ac¬ companied by quartz, mica, and copper pyrites. It is fuppofed by fome to be cryftallized ferpentine. 10. Species. Talc. This fpecies is divided into three fubfpecies 5 1. earthy, 2. common, and 3. indurated talc. Subfpecies 1. Earthy Talc. Talcite, Kirw. i. 149. Le Talc Terreux, Brocb. i. 486. Talc Granuleux, Hairy, iii. 255. Exter. Char.—Earthy talc is found difleminated in kidney-form mafies, or in fuperficial layers 5 luftre glim¬ mering, pearly \ friable j the particles fcaly, pulveru¬ lent, or flightly cohering. Colour greenifti, reddilh, or filvery white $ ftains ; feels greafy, and is light. Localities, &c.—This mineral is found in Piedmont, Saxony, Bohemia, and in the weftern parts of Invernefs- flrire in Scotland, where it exifts in veins or cavities of primitive rocks. Subfpecies 2. Common Talc. Id, or Venetian Talc, Kirw. i. 150. Le Talc Comtnun, Broch. i. 487. Talc Laminaire, Hairy, iii. 255. Exter. Char.—This mineral is found maflive, dif- feminated, and rarely cryftallized in very fmall fix-fld- ed tables j luftre ftrining or refplendent, pearly or me¬ tallic ; fra&ure ftraight or curved foliated ; fragments wedge-fhaped. Colour greenilh white, pale apple green, reddifh or yellowifh white •, tranflucent or femitranfparent, in thin plates tranfparent j foft, flexible, but not elaftic j feels greafy. Spec. grav. 2.7 to 2.8. Chem. Char.—Infufible before the blow-pipe, which diftinguilhes it from chlorite ; does not effervefee with, acids. Conjlituent Parts. Hoepfner. Silica, 50 Magnefia, 44 Alumina, 6 100 Le Talc Endurci, Broch. i. 489. Exter. Char.—This is found maflive, and fometimes, it is faid, cryftallized 5 luftre ftiining and refplendent, refinous or pearly ; fraflure curved foliated, or flaty j fragments blunt-edged, tabular. Colour greenifh white, fnow white, or apple green 5 tranflucent j in thin plates femitranfparent j very foft j fmooth, and greafy to the feel. Localities, &c.—Indurated talc forms beds in moun¬ tains of argillaceous fchiftus, gneis, and ferpentine, in the Tyrol, Italy, and Switzerland, and alfo in the weftern parts of Scotland. Ufes.-T-lt is applied to the fame purpofes as the pre¬ ceding. 11 Species. Asbestus. This is divided into four fubfpecies: 1. mountain cork 5 2. amianthusj 3. common afbeftus 5 and, 4. ligniform afbeftus. Subfpecies 1. Mountain Cork. _ Suher Montanum, Kirw. i. 163. Le Liege de Mon- tagne, JJroch. i. 492. sljbejle Treje, Hauy, iii. 247. Exter. Char.—This mineral is found maflive, often in fmall plates, which are fometimes thin, and are then denominated mineral paper ; fometimes thick, and then called mineral leather ; more rarely in porous or cellular pieces, when they are denominated ; Ibme- times it is marked with impreflions ; the lultre is weak¬ ly glimmering or dull ■, frafture to appearance compaft and uneven, but it is fibrous, and the fibres are fometimes parallel, and fometimes interwoven j fragments very blunt edged. Colour yellowifh or grayifh white 5 opaque ; very foft, extremely difficult to break ; in thin plates flexi¬ ble and elaftic •, creaks when handled feels meagre. Spec. grav. 0.68 to 0.993. them. Char.—Melts before the blow-pipe with dif¬ ficulty. Conjlituent Parts. Bergman. Silica, 56.2 Magnefia, 26.1 Alumina, 2. Lime, 12.7 Oxide of iron, 3. 100.0 Localities, &c.—This mineral is found in thin veins in ferpentine rocks : it is often mixed with quartz, talc, and filver ores, as in Saxony. It is alfo found in Svye- den, Norway, Siberia, Hungary, and in the lead veins at Leadhills in Scotland. Subfpecies Part I. MINERALOGY. 195 l' Subfpecies 2. AMIANTHUS. Localities.—It is found in fimilar lit nations with the Magnefian ^ Id. Kirw. i. i6r. DAmianthe, Broch. i. 404. Afbejle Preceding, in Saxony, Ruffia, Sweden, and in the weftern Flexible, Haiiy, iii. 247. Parls of Scotland. Exter. Char.—This variety is alfo found maflive, more rarely diffeminated, and in fmall detached bundles $ luftre glimmering, or a little Ihining and lilky j fradore fibrous ftraight or parallel. Colour greenifh or filvery white, yello.wilh white, or greenilh gray j opaque j rarely tranllpcent at the edges •, very flexible, and even elaftic in thin fibres j feels greafy. Chem. Char.—Melts with difficulty before the blow¬ pipe, into a white, gray, yellow, and fometimes black enamel. Conjlituent Parts. Bergman. Chenevix. Silica Magnefia Alumina Lime .Barytes Oxide of iron Lofs 64 64 59. 17.2 18.6 2 c. 2.7 3.3 3. 13.9 6.9 9.25 6. 2.2 J.2 2.25 1.50' 100.0 100.0 100.00 Localities, &c.— Amianthus is ufually found in primi¬ tive rocks, but particularly thofe of ferpentine. It is found in Saxony, Bohemia, Italy, Spain, France, Swe¬ den, and in the weftern parts of Scotland ; but the fineft: fpecimens of amianthus are brought from the ifland of Corfica. JJfes.—On account of the flexibility of this fubftance it is fpun into threads ; for this purpofe it is mixed with lint, to render the threads lefs brittle in working them into cloth, which is afterwards paffed through the fire that the vegetable matter may be confumed, and the amianthus, which is infufible, remains j and thus an incorabuftible cloth is obtained. The ancients manu- fadured this cloth for the purpofe of wrapping round their dead bodies, that their alhes might be preferved unmixed with the wood employed in burning them. Subfpecies 3. Common Asbestos. Ajbejlus, Kirw. i. 159. L'Aficfle Commune, Brochant, i. 497. AJbeJle Dur, Haiiy, iii. 247. Exter. Char.—This alfo is found maflive; luftre (hining and weakly ftiining, filky or refinous ; furface fibrous, the fibres being parallel, ftraight or curved j the fibres are more ftrongly united than in amianthus, and hence fometimes a fplintery fra&ure. Colour leek green, greenifh, or yellowifli gray j tranf- lucent at the edges j foft, or lemihard 5 rather eafily frangible ; little flexible ; feels greafy j fpec. grav. 2.54 to 2.99. Chem. Char.—Melts with difficulty before the blow¬ pipe, into a dark gray flag. Conjlituent Parts. Wiegleb. Silica 46.66 Magnefia 48.45 Oxide of iron 4.70 Lofs .1 100.00 Subfpecies 4. Ligniform Asbestos. Id. Kirw. i. t6i. Le Buis de Montague, Brochant, i. 499. AJbeJle Ligniforme, Haiiy, iii. 248. Exter. Char—This alfo is found maflive ; luffre glimmering, filky ^ fradure in large maffes, curved llaty ; in fmall pieces fibrous, and having the ap¬ pearance of a woody texture j fragments in elongated plates. Colour yellowifti brown of different (hades j opaque j foft; not difficultly frangible ; in thin fragments a little flexible, but not elaftic ; feels meagre j adheres to the tongue j ftreak ftiining. Chem. Char.—Before the blow pipe is only fufible at the edges. Localities, Sac.—T his variety is found in the Tyrol, where it is accompanied by galena, black blende, and a grayilh white quartz. 12. Species. Cyanite. Id. Kirw. i. 209. La Cyanite, Brochant, i. 501. Sappare, Saujf. §. 1900. DJlhene, Haiiy, iii. 220. Exter. Char.—This mineral is found maflive, diffe¬ minated, or cryftallized, in four-fided prifms, of which two are broad and tw-o narrowq and having the four la¬ teral edges, or only the two oppofite edges, truncated. This prifm is often lo flattened, as to have the appear¬ ance of a table. The broad faces of the cryftals are fmooth and ftiining, the narrow faces ftreaked and only glimmering, almoft dull. Internal luftre ftiining and pearly ; fra&ure curved radiated j that of the cryftals foliated j fragments tabular, fometimes fplintery, or im- perfeflly rhomboidal. Colour blue of various (hades, fometimes bluifli and pearl grayj and different colours are arranged in (tripes, fpots, or clouds j tranflucent, or when cryftallized femitranfparent, or tranfparent; femihard, and fome¬ times foft; eafily frangible j feels greafy. Spec. grav. 3.51 to 3.62. _ Chem. Char.—Entirely infufible before the blow¬ pipe, on which account this mineral was employed by Sauffure as a fupport for other fubftances in experiments with that inftrument. Conjlituent Parts. Sauffure. Silica 29.2 Alumina 35. Lime 2.25 Magnefia 2. Oxide of iron 6.65 Water and lofs 4.9 100.00 Localities, &c.—Cyanite is found on St Gothard in Switzerland, in cryftals mixed with quartz, garnets, and granite, and imbedded in indurated talc. It is alfo. found in Spain, France, Carinthia, Bavaria, Siberia, and in the north of Scotland, and always in primitive moun¬ tains. 13. Species, Bb 2 ipS MINER Magnefian , ge'1U5- 13. Species. Actynolite. This is divided intx) three fubfpecies; t. afbeftous, 2. common, and 3. glafly. Subfpecies 1. Asbestous Actynolite. Amianthinite, Kirw. 3. 164. and Metalliform AJbeJloid, ibid. 167. LaRayonnante Afbejl'tforme^ Broch. i. 504. Aciinote Aciculaire, Hauy, iii. 75. Exler. Char.—This mineral is found maflive, and rarely cryftallized in rhomboidal fix-fided prifms, two of which are about 1240 30', and four about luftre glimmering j internal luftre weakly fhining, fome- times ihining, pearly j fradture radiated j fragments wedge-draped. Colour white, or greenidi, reddilh, or yellowilh grayj commonly opaque; fometimes tranflucent at the edges; ftreak greenilh white; foft, rarely femi-hard ; rather difficultly frangible. Specific gravity 2.58 to Chem. Char.—Fufible before the blow-pipe into a black flag, or grayiffi white enamel. Localities, &c.—Found in the neighbourhood of Bayreuth and the Bannat, in beds of ferpentine and fteatites. Subfpecies 2. Common Actynolite. AJhcJlinite, Common, AJbeJloid, and Schorlaceous AByno- lite, Kirw. i. 165—-168. La Rayonnante Commune, Broch. i. 507. Aciinote Hexa'edre, Hairy, iii. 74. Exter. Char.—Maffive, diffeminated, cryftallized in elongated, very oblique, fix-fided prifms, having the acute lateral edges truncated. The cryftals are acicular, and longitudinally ftreaked ; luftre fhining and vitreous; fraffure radiated, parallel or divergent, ftellated ; frag¬ ments rather blunt-edged. Colour olive green, piiiachio green, reddifh brown ; cryftals tranflucent or femitranfparent; femihard ; dif¬ ficultly frangible ; rarely feels greafy. Spec. grav. 3 .to 3-3r- ' Chem. Char.—Fufible before the blow-pipe into a black flag, a white tranfparent glafs, or a grayifti white enamel. ConJUtuent Parts. Bergman. Silica 64. Magnefia- 20. Alumina 2.7 Lime 9.3 Oxide of iron 4. 100.0 Localities, &.c.—It is found in Saxony, Switzerland, Norway, and weft fide of Invernefs-ftiire in Scotland. Its repofitory is in primitive mountains, where it is ac¬ companied with ores of lead and iron, as well as with quartz and brown blende. Subfpecies 3. Glassy Actynolite. Id. Kirw. i. 168. La Rayonnante Vitreufe, Broch. i. A L O G Y/ Part I. 510. Thallitc, Lametherie, ii. 319. Epidote, Hauy, Claffifka- iii. 102. ' ' tion. Exter. Char.—Found maffive or cryftallized in thin fix-fided priims, whofe furface is fmooth and re- fplendent ; internal luftre fhining, vitreous ; fracture radiated or wedge-fhaped, fibrous ; fragments fplin- tery. Colour olive green, leek green, and afparagus green; tranflucent, or femitranfparent; femihard, or hard ; very brittle, and very eafily frangible. Spec. grav. 2.95 to 349* Localities, &c.—This variety is found in fimilar re- pofitories, and in fimilar places with the preceding. 14. Species. Tremolite. This is alfo divided into three fubfpecies; 1. afbeftous, 2. common, and 3. glafiy. Subfpecies 1. Asbestous Tremolite. La Eremolithc AJheJiiJorme, Broch. i. 514. Gramnmtite, Flauy. iii. 227. Exter Char.—Found maffive, difleminated, and cryftallized ; and the cryftals are capillary or acicu¬ lar ; luftre weakly finning, filky or pearly ; frac¬ ture radiated or fibrous; fragments fplintery and wedge- fhaped. Colour yellowiffi white, reddiffi, greeniffi, or grayifli; opaque; tranflucent at the edges; very foft; eafily frangible. Subfpecies 2. Common Tremolite. La Tremolithe Commune, Broch. i. 515. Exter. Char.—Maffive, or cryftallized in rhomboidal prifms, with angles of 1 26° $2' 12", and 530 7' 48,/. The cryftals are deeply ftriated longitudinally; exter¬ nal luftre refplendent; internal fhining, pearly; frac¬ ture radiated, either parallel, divergent, or promifcu- ous: furfaces of the frafture longitudinally ftreaked ; fragments fplintery. Colour greenifh white, reddifh, or yellowiffi; rarely pearl gray ; always tranflucent ; in cryftals femitranf¬ parent ; femihard ; brittle; eafily frangible ; meagre to the feel. Subfpecies 3. Glossy Tremolite. La Tremolithe Vitreufe, Broch. i. 516. Exter. Char.—Maffive, or cryftallized in long needle or awl-fhaped prifms ; internal luftre fhining, and fometimes refplendent ; vitreous or pearly; fradlure radiated; crofs fra&ure even, and a little oblique; fragments fplintery. Colour greenilh or yellowiffi white; tranflucent ; cryftals fometimes tranfparent; femihard ; brittle; eafily frangible; feels meagre. Spec. grav. 2.92 to 3.2, Hauy. Chem. Char.—Before the blow-pipe it melts into a porous white flag. Confitucnt- Part I. MINERALOGY. ConJHtuent Parts. Klaproth. Laugier. Silica Lime Magnefia Oxide of iron Carbonic acid 7 and water J Lofs 65. 18. io-33 .16 6.5 White. 35-5 26.5 16.5 23- Gray tremolite. 5° 18 25 .01 100.00 101.5 100 Physical Char.—By percuffion or fri&ion in the dark, a reddilh phofphorefcent light appears j and the powder thrown on burning coals yields a greenilh light. Localities, See.—Tremolite is found imbedded in limeftone, in primitive mountains. It was firft difeover- ed in the valley of Tremola by Pini, and hence its name. It is alfo found in Hungary, Bohemia, and Ca- rinthia, and in the mountains fix miles fouth of Pail- ley in Scotland, where it is accompanied with preh- nite. 15. Species. Smaragdite. Id. Sauffure Voy. $. 1313* Diallage, Hauy, iii. 125* Id. Brochant, i. 423. and ii. 506. Exter. Char.—Smaragdite has been found maflive and diffeminated. Internal luftre fhining. Fracture foliated. Cleavage fingle. Fragments rather fitarp edged. Colour, grafs or emerald green. Slightly tranllu- cent. Semi-hard or foft. Brittle. Spec. grav. 3. Chem. Char.—Before the blow-pipe melts into a gray or greenilh enamel. Conjlituent Parts. Vauquelin. Silica Alumina Lime Magnefia Oxide of iron chromium 5° 11 J3 6 Lofs — copper 100.0 197 ed. Luftre (lightly glimmering, refinous. Fradlure fo-.Calcaiecus liated. Cleavage threefold. Fragments fometimes t rhomboidal. Colour grayilh green or bluifti gray. In thin plates tranllucent. Scarcely fcratches glafs. Very foft to the touch, from which it has the name malacolite. Spec, grav. 3.2307 to 3.2368. Chem. Char.—Fufible before the blow-pipe into a porous glafs. Conjlituent Parts. Vauquelin. Silica Lime Magnefia Alumina Iron and manganefe Lofs 53 20 19 3 4 1 100 Localities, Sec.—This mineral was difeovered by D’Andrada in the filver mines of Sahla in Sweden, and hence it derived its name. It was found by the fame naturalift at Bufen in Norway.—It appears from the obfervations of Hauy that fahlite and augite are very clofely allied, not only in ftru&ure and external cha- radlers in general, but alfo in their conftituent princi¬ ples 5 the only difference in their compofition is in the proportions of the lime and magnefia, which are fmall- er in augite than in fahlite ; but the proportion of iron in the former is confiderably greater than in the lat¬ ter. 17. Species. Schalstone, or Tabular Spar. Exter. Char.—This mineral is found maflive ; luftre fhining and pearly ; fra&ure foliated or fplintery, and coarfe fibrous 5 confifts of feparate large-grained pieces implicated in each other ; and according to Karften, are very regular. Colour milk white, yellowilh or reddilh white , tranflucent 5 femi-hard , brittle. Conjlituent Parts. Silica Lime Water 50 45 5 Localities, Sec.—This mineral was found by Sauf- fure in the vicinity of Turin, imbedded in nephrite clouded white and blue. It has alfo been found near the lake of Geneva among the rounded pebbles, and in Corfica in primitive rocks. In Italy, tables and orna¬ mental pieces of furniture are made of fmaragdite ; and the Italian marble-cutters call it verde di Corjica. 16. Species. Sahlite. Id. D’Andrada, Jour, de Phyf. An 8. p. 241. Mala- colithe, Hauy,- iv. 379. Id. Brochant, ii. 518. Exter. Char.—Found maflive or cryftallized in fix- fyled prifms, having two oppofile lateral edges Cuncat- Localities, Sec.—This mineral was firft noticed by Stutz. It is found in the bannat of Temefwar, and is accompanied by cryftallized garnets and calcareous fpar. VI. CALCAREOUS Genus. 1. Species. Agaric Mineral, or Mountain Mille. Id. Kirwan i. 76. Id. Brochant i. 519. Chaux Car¬ bonate Spongieufe, Hauy, ii. 167. Exter. Char.—This mineral is compofed of fine pul¬ verulent particles, flightly united together, and nearly filable. Colour yellowilh white, or fnow white} flains ftrong- \ 19S MINERALOGY. Calcareous }y ; feels meagre ; does not adhere to the tongue 5 near- . g«- ly floats on water. " v Chem. Char.—Effervefces with acids, and is entirely dilfolved, fo that it is chiefly compofed of lime and car¬ bonic acid. Localities, See.—This mineral is found in the fif- fures and cavities of calcareous mountains, and it is fuppofed that it originates from the deftruftion of the rocks, the particles of which are carried down to the fiffures and cavities by rain water. Abundant in Swit¬ zerland. Part 1. Conjiituent Parts. Tennant. Lime 29.5 Magnefia 20.3 Carbonic acid 47.2 Alumina and oxide of iron .8 Lofs 2.2 2. Species. Chalk. Id. Kirwan i. 71. La Crate, Brochant, j. 521. Chaux Carbonate Cray cafe, Hauy, ii. 166. Exler. Char.—Found maflive } has a dull appear¬ ance j fradure earthy, and fragments blunt edged. Colour ufually fnow or yellowilh white, fometimes gray or brown ; opaque *, flams and writes \ very foft, •and ealily frangible 5 feels meagre ; adheres a little to the tongue. Spec. grav. 2.31 to 2.65. Chem. Cfor.—Eflfervefces with acids; before the blow-pipe is calcined, and converted to quicklime. It is almoft entirely compofed of lime and carbonic acid, vt’itli a mixture of a little oxide of iron and fome other fubftances. Localities, &c.—Chalk forms peculiar ftratiform mountains which contain many petrifadions, the matter of which is almoft ahvays filiceous. They contain alfo flints arranged in regular ftrata. No metallic fubftances are found in chalk. A great body of chalk traverfes France from fouth to north, extending from Champag- ny to Calais, and continued to England, in the fouth of which it forms extenftve beds. Chalk is alfo found in the ifland of Zealand, in the Baltic, in Poland and many other places. 3. Species. Limestone. This is divided into four fubfpecies, which are, 1. corn- pad, 2. foliated, 3. fibrous, and 4. pea ftone. Subfpecies 1. Compact Limestone. This fubfpecies is again divided into two fedions $ the firft including common compad limeftone, and the fecond roe-ftone. A. Common Compact Limestone. Localities, &c.—Forms very extenfive ftratiform mountains, and is ufually met with along with coal and fandftone. It is very abundant in Saxony, Bohemia, Sweden, France, Switzerland, and Britain. LJfes.—The ufes of limeftone for the purpofes of building, and when reduced to the ftate of quicklime, to form the bails of mortar, as well as in various arts, are well known. This variety of limeftone, when fufceptible of a po- lilh, furnilhes many of thofe ftonfis which are known by the name of marbles ; which name, although it be ap¬ plied to very different ftones which are fufceptible of a polifli, and are fit for fculpture, or ornamental archi- tedure, is frequently applied to limeftone of this de- feription. B. Oolite, or Roe Stone. Id. Brochant, i. 529. Oviform Limefone, Kirw. i. 91. Chaux Carbonate Globuliforme, Hauy, ii. 171. Exter. Char.—This is found maflive 5 internally dullj fradure compad \ fragments blunt-edged. Colour yellowilh, fmoke gray, hair, or reddifti brown j opaque \ rarely tranflucent at the edges $ femihard j confifts of fmall, globular, diftind concretions : the fize of the concretions very various. Spec. grav. 2.4 to 2.5. Localities, &c.—Roe ftone is found in Sweden, Swit¬ zerland, Saxony, and in the fouth of England. The ketton ftone of England, and the celebrated Portland ftone, belong to this variety. Of the latter fome of the principal public buildings in, England and Ireland are conftruded. Ufes.*—It is employed as a building ftone 5 and »dien of a fine grain, it is poliflied and employed as marble. Subfpecies 2. Foliated Limestone. Of this there are two varieties, granularly foliated, and calcareous fpar. Id. Kirw. i. 82. Id. Broch. i. 523. Chaux Carbonate CompaBe, &c. Hauy, ii. 264. Exter. Char.—Found maflive ; external form fre¬ quently figured from the numerous petrifadions wdnch it contains; internally dull j rarely glimmering •, frac¬ ture compad, fplintery, uneven or earthy j fragments not very (harp edged. _ Colour ufually gray, fometimes reddifh or yellowilh j different colours exhibit fpots, ftripes, veins, and den- dritical figures •, tranflucent at the edges $ femihard j brittle } eafily frangible •, feels meagre ; gives a grayilh white ftreak. Spec. grav. 2.6 to 2.7. Chen\- Char.—DiiTolres in acids with effervefoence. A. Gkanolaely Foliated Limestone. Pierre Calcaire Grenue, Broch. i. 531. Chaux Carbo- natd Saccharbide, Hauy, ii. 164. Exter. Char.—Yo\M\& only maflive j hiftre Ihining, or ftrongly glimmering •, between pearly and vitreous , fradure ftraight foliated j fragments rather blunt- edged j in granular, diftind concretions, fmall or fine grained. Colour ufually fnow white, grayilh, yellowilh, green- ilh, and rarely reddilh white, and fometimes it is fpot- ted, veined, or ftriped $ ufually tranflucent; femihard j feels meagre ; brittle, and eafily frangible. Spec. grav. 2.7 to 2.8. * 3 Chem. Part T. MINE R Claflifica- CJietn. Char.—EServefces with acids, and is almoft tion. entirely diflolved. Some varieties, however, from an admixture of other fubltances, are very {lowly a&ed on by acids. Localities, See.—Granularly foliated limeflone be¬ longs almoft excluftvely to the primitive and tranfition mountains, repofing on gneis, micaceous fchiftus, and clay flate, containing, beftde other mineral fubftances, various metallic ores. It is found in Italy, Saxony, Bohemia, Sweden, Nor¬ way, Fiance, and Britain. Ufes.—This variety of limeftone is applied to the fame purpofes as the former. Of Marbles.— In the language of the architeff and ftatunry, all ftones come under the name of marble which are harder than gypfum, are found in large maftes. and are fufceptible of a good polilh. On this principle many varieties of limeftone, granite alfo and porphyry, ferpentine, and even fine-grained bafalt', are denominated marbles. But the word among mineralogifts is taken in a more reftrifted fenfe, and confined to fuch varieties of dolomite, fwineftone, and compaft and granularly foliated limeftone, as are capable of receiving a good polilh. The moil valuable of the calcareous marbles, for hardnefs, durability and colour, are brought from Italy, the Greek iilands, and from Syria. When the ancient Romans were at the height of their civilized luxury, they obtained fome varieties of marble from Numidia and other countries, which were Very much efleemed. The fculptors of ancient Greece and modern Europe have always held the white granularly foliated limeftone in the higheft eftimation, both on account of its pure colour, delicate tranflucence, and granular texture, which make it much caller to work than cornpacf limeftone. The fpecies called dolomite is fofter, and of a finer grain, fo that it is even more manageable tinder the chiflel, and therefore many of the fmaller works of the Greek fculptors are of this ftone •, but Paros and Carrara furnifh Europe with the greateft quantity of ftatuary marble. The Parian marble, which confifts almoft entirely of carbonate of lime, is the pureft, fofteft, and has fome degree of tranfparency ; that of Carrara is often mixed with granular quartz in confiderable proportion. The following are the archi¬ tectural marbles which are held in greateft eftimation. 1. The marble called hardiglio, from Carrara, is of a deep blue colour, and leems to be the lame with the white ftatuary marble of that place, with the addition of fome colouring matter. 2. That variety of marble called cipoiin, is ftatuary marble traverfed by veins of mica. 3. Lumachella marble. This is a compadt limeftone of a brownifti gray colour, containing theils which often retain the original pearly luftre. To this variety belongs the fire marble of B1eyberg in Carinthia, in which the imbedded {hells are beautifully iridefeent. 4. Florentine marble. This is a grayifti, compact, argillaceous limeftone, exhibiting deligns of a yellowilh brown colour, and refembling the ruins of houfes: hence it is called ruin marble. • 5. The marbles of Syria, Sienna, and Arragon, are of a yellow colour, and are in csnfiderable eftimation. 6. Brocjteilo mrrb/e. This is a breccia limeftone, cempofed of fragments of a yellowilh red and purple A L O G Y. 199 colour, which are cemented by femitranfparent, white Calcareous calcareous fpar. Senus- 7. The marbles known by the names of verde antiche,' v verde di Corjica, are compofed of limeftone, calcareous fpar, ferpentine, and aibeftus. 8. The Britiftr ifiands ciTord many fine marbles, of which that of Tiree is the fineft and moft beautiful. It has often a delicate flelh coloured ground, fpotted with green ; but its colours, it is faid, are apt to fade. Marbles have alfo been found in the ifiand of Skye, and in the counties of Rofs and Sutherland. For a particular account of thefe, fee William's Mineral Kingdom. Marble is not uncommon in different parts of England ; and in particular Devonftiire and Derby- fhire afford varieties which are held in confiderable efti¬ mation on account of their beauty. E/aftic marble. Some varieties of granular limeftone, when cut into thin plates, poffefs a certain degree of elafticity. The marble in which this property was obferved, was in the B mghefe palace at Rome. It was got from an ancient building. Dolomieu fuppofed that marble acquired this property by being deprived of moifture, and Fleuriau de Bellevue confirmed this opinion, by fubjefting certain maibles to heat. He found alfo a natural elaftic marble in Mount St Got- hard. B. Calcareous Spar. Common Spar, Kirvv. i. 86. Le Sgath Calcaire, Broch. i. 536. Cliaux Carbonate'e, Hauy, ii. 127. Ej]en. Char.—Divifible into a rhomboid of and 78^° ; foluble with effervefcence in nitric acid. Exter. Char.—Calcareous fpar is found maffive, or diffeminated in various forms, as globular, kidneyform,.. cellular, and ftaladHtical; but it is moft frequently cry- ftaliized. The primitive form of its cryftals is an ob- tufe rhomboid, whofe angles are 101° 32' 13'' and, 78° 27' 47" ; integrant molecule the fame. The variety of forms ot calcareous fpar is very great. Werner reduces them to three principal or prevailing forms, and from thefe he deduces the variations and modifications which take place. His principal forms are, 1. The fix Tided pyramid ; 2. The fix-fided priftn ; and 3. The three- fided pyramid. But according to others following the fame method, the principal forms are the five follow¬ ing : 1. The fix-fided pyramid; 2. The fix-fided prifm ; 3. The fix-fided table ; 4. The fix-fided pyramid, and 5. The hexahedron, including the rhomboid and cube. 1. The fix fided pyramid is either fimple or double. A. Simple. Simple pyramids are the furnmits of other pyramids, or of prifms, and they are varioufly modified in being equal fided, acute, or obtufe, having the angles at the bafe truncated, or having an obtufe three-fided fummit {lightly convex. B. Double ; in which two pyramids are obliquely united, and varioufly modified, by having the angles at the bafe truncated, or the faces of the fummit a little convex. 2. The fix-fided prifm, is alfo varioufty modified, by having at each extremity a fix-fided acute fummit, or a fecond obtufe fummit of three fides, placed alternately on three edges of the fit ft. 3- fix-fided tabie, which is either perfeft witJi equal or unequal fides, or rounded, or lenticular. 4. Thau 200 MINERALOGY. Part I. Calcareous 4. The three fided pyramid, which is either Ample genus- or double, and is alfo varioufly modified. * ' ' 5. The hexahedron, which includes the rhomboid, and this is either perfefl, or has convex faces, or has fix obtufe edges truncated , and the cube, which is fome- what rhomboidal. But for a full account of all the varieties and modifications in the cryftallization of cal¬ careous fpar, the reader is referred to the treatifes of Hauy and Brochant. The cryftals of calcareous fpar exhibit alfo a fimi- larity of arrangement. The Ample fix-fided pyramids are frequently difpofed in a globular, fafcicular, or llellated form. The fix-fided pyramids are difpofed in rows ; the fix-fided prifms are often difpofed like fleps of flairs, or are fafcicular, or kidney-form •, fome acute three-fided pyramids of calcareous fpar have been found hollow, and in fome prifms the centre has been obferv- ed of another colour. The furface of the cryftals com¬ monly fmooth •, luftre (hining or refplendent ; internal luftre refplendent or fhining, vitreous, and fometimes pearly ; fracture foliated ; cleavage threefold j fragments always rhomboidal. Colour ufually white, grayifh, reddifti, greenilh, or yellowifti white, rarely violet blue, or yellowifh brown. Various degrees of tranfparency j wThen perfectly tranf- \ parent, refraflion is double. It was in this fubftance that the property of double refra&ion was firft obferved, and hence it wras called double /par. This Angular property engaged the attention and mathematical fkill of Newton, Huygens, Buffon, and more lately the celebrated Hauy. Calcareous fpar is femihard, brittle, and eafily frangible. Sp. grav. about 2.7. Chem. Char.—Soluble with effervefcence in nitric acid, and reduced by calcination to quicklime. * Phil. Mag. xiv. 290. Conjlituent Paris. Bergman. Phillips. * Lime _ . 55 55-5 Carbonic acid 33 44. Water n *5 100 100.0 Physical Char.—Some varieties of calcareous fpar, and particularly thofe from Derbylhire, give out when heated, a phofphorefcent light. Localities, &c.—Calcareous fpar is very common in all kinds of rocks, in veins and cavities, and particularly in mineral veins, accompanied with quartz, lluor Ipar, heavy fpar, and metallic ore. The fineft fpecimens of rhomboidal fpar are brought from Iceland, Derbyfliire, the Hartz, as well as Saxony, France, and Spain. The cryftallized fandftones of Fontainebleau are real rhomboidal cryftals of calcareous fpar, which, during the procefs of cryftallization, have been penetrated with particles of fand. Subfpecies 3. Fibrous Limestone. Id. Kirw. i. 88. La Pierre Calcaire Fibreufe, ou la Stalactite Calcaire, Broch. i. 549. Chaux Carbonates Concretionnce, Hauy, ii. 168. Of this fubfpecies tw7o varieties have been formed, common fibrous, and calcareous finter. 4 A. Common Fibrous Limestone. Claflifica- tion. Exter. Char.—Found maflive ; luftre w'eakly ftiining and pearly 5 fraclure fibrous, fometimes coarfe and deli¬ cate, ftraight or parallel, and fometimes radiated ; frag¬ ments fplintery. Colour ufually grayilh, reddifh, and yellowifti white ; generally tranflucent 5 rarely femitranfparent. Localities, &c—This variety is found in veins ; and fome of it is fufceptible of a fine polifti, and was known to the ancients under the name of calcareous alabajlcr, to diftinguifti it from gypfeous alabafter. Sattin fpar, a beautiful mineral, which is alfo fuf¬ ceptible of a fine polifti, and has a filky luftre, from W'hich it derives its name, belongs to this variety. It was firft discovered in Cumberland, and has fince been found in other places in Britain. B. Calcareous Sinter. This variety is ufually found llaladtitical or tuberofe, and alfo fometimes kidney-ftiaped, botryoidal, tubular, and coralloidal. Surface ufually rough, or drufy, rarely fmooth 5 internal luftre glimmering, fometimes w7eakly Ihining, filky, or pearly 5 fra&ure fibrous, which is either ftraight, fcopiform, or llellular; fragments wredge-fiiaped and fplintery. Colour fnow white, grayifti green, or yellotvifti white, and thefe are fometimes arranged in ftripes or veins j tranftucent, fometimes only at the edges j rarely femitranfparent ; between femihard and foft j brittle and eafily frangible. Sp. grav. 2.728. Localities, &c.—This mineral leems to be a depo- fition of calcareous particles, formed by the gradual in¬ filtration of water into the cavities and fiffures of lime- ftone mountains. They are either depofited in layers on the floor, or fufpended from the roof of thofe grottoes, and in this latter cafe they aflume a great variety of imitative forms. It is found therefore, in the celebrated grottoes of Auxelles, Arcy, and Antiparos, and in the cavities of mineral veins at Leadhills. The Angular mineral fubftance, known by the name offlos ferri, belongs to this variety. This is found in the cavities of veins of fpathofe iron ore, from which it has derived its name. It is of a branched or coralloidal form. Subfpecies 4. Pisolite or Pea-Jlone. Oviform Limejlone, var. Kirwr. i. 91. La Pierre de Pois, Broch. i. 555. Chaux Carbonates Global forme, Hauy, ii. 171. Exter. Char.—This mineral is found maffive, and in the cavities in which it is formed, the furface is kidney- ftiaped j internally dull ; frafture difficult to determine but appears even •, fragments rather ffiarp-edged. Colour white, fnow white, grayiffi, reddiflr or yel¬ lowifti white •, opaque ; jrarely tranflucent at the edges j foft, and brittle. Localities, &c.—Pifolite is found at Carlfbad in Bohemia, where it has been long known, and wnere an entire bed w'as difeovered in digging the foundations for a church. Each of the grains of pifolite contains for a nucleus a particle of fand. Thefe have been in¬ cruft ed with the carbonate of lime held in folution by water, V Part T. MINERALOGY. 2cr Claffifica- water, and particularly by tbe warm fprings of Carlf- tl0r1, bad. New concentric layers being depollted, they at ’ v laft fall to the bottom, and are there united into larger mafles by new depolitions of the fame calcareous matter. Pifolites are alfo found in Hungary and in Silefia. 4. Species. Calcareous Tufa. TLxter. Char.—This mineral has ufually the form of the fubftance on which the calcareous matter has been depofited, as that of mofs-which is molt com¬ mon, grafs or leaves ; internally dull, or weakly glim¬ mering ; fracfure uneven or earthy 3 fragments blunt- edged. Colour yellowifh gray of various (hades 5 opaque, or translucent at the edges 3 foft, fe£Hle, and eaiily fran¬ gible 3 light 3 almoft fwims on water. Localities^ &c.—This fubftance is found in all lime- done countries, through the drata of which water paffes, . thus forming fprings impregnated with carbonate of lime, which is afterwards depofited on plants or other fubfiances. This mineral, therefore, is found in alluvial land, and the procefs of its formation is conftantly go¬ ing on. 5. Species. Foam Earth. Silvery Chaih, Kirw. i. 78. L'Ecume de Terre, Broch. i- 5'57- Exter. Char.—This mineral is found maffive, dif- feminated, or in fcaly particles, which are fomewhat friable 5 internal luftre fhining or femimetallic 3 the iolid varieties have a curved foliated fra&ure j frag¬ ments blunt edged. Colour yellowifh or greenifh wdiite, fometimes filvery white 3 opaque 3 (tains 3 very foft or friable 3 feels a little greafy or filky. diem. Char.—Effervefces.and difiblves in acids, Conjlituent Paris. Lime, _ 51.5 Carbonic acid, 39. Silica, 5.7 Oxide of iron, 3.2 Water, 1. 100.5 Localities, &.e.—This mineral has been found in mountains of (tratified limeftone at Jena in Mifnia, and at Eifleben in Thuringia. This is confidered by fome as belonging to the fol¬ lowing fpecies, and by others as merely a variety of a- garic mineral. '6. Species. Slaty Spar. Argentine, Kirw. i. 105. Le Spa the Schi/leux, Brcch. i. 558. Schiefer Spath of the Germans. Id. Phillips, Phil. Mag. xiv. 289, and 293. Exter. Char.—Found maffive or diffeminated ; in¬ ternal luftre (hining, pearly 3 fracture curved foliated 3 fragments wedge-ffiaped, or blunt-edged. Colour grayiffi. reddiffi, or yellowiih white 3 tranfiu- cent 3 foft; brittle 3 feels greafy. Spec. gray. 2.723. Vcl. XIV. Part I. Chem. Char.—EfFervefces brifkly with acids. Calcar eon" genus. ConJHtuent Parts. Carbonate of lime, 98. II Silica, .05 Oxide of iron, .8 Lofs, 1.04 100.00 Localities, &c.—This mineral is found in Saxony, in- a bed of limeftone, where it is accompanied with ga¬ lena; in Norway 3 and in Cornwall in England. 7. Species. Arragonite. Arragon Spar. Kirw. i. 87. L'Arragonite, Broch. i. 576. Id. Hauy, iv. 337. Exter. Char.—This mineral is always found cryftat- lized in fix-fided equiangular prifms, or with two op- pofite faces broader, to which correfpond the two faces of an acute bevelment, which terminates the prifm. The edges of the bevelment are alfo truncated. The cryftals are varioufly grouped, and commonly in the form of a crofs 3 cryftals (freaked longitudinally 3 luftre (hining or refplendent, vitreous ; fradture foliated. Colour grayiih or greeniih wffiite 3 tranflucent and femitranfparent 3 refradfion double 3 hard, fcratches calcareous fpar ; brittle, and eafily frangible. Specific gravity 2.946. Chem. Char.—Effervefces with acids, and is entire¬ ly diffolved. The conftituent parts, according to nu¬ merous and accurate analyfes, are the lame as thofe of calcareous fpar 3 but its fuperior hardnefs, diver- fity of form, and other external charadfers, have long puzzled chemical philofophers 3 and it (fill remains un¬ determined to what that diverfity is owing in this mi¬ neral. Localities, &c.—Arragonite was firft found imbed¬ ded in foliated and fibrous gypfum, in the province of Arragon in Spain, from which it derives its name. It has been alfo found in France, the Pyrenees, in Saltzburg, fometimes in an argillaceous fchiftus, and (ometimes in quartz, accompanied by calcareous fpar and pyrites. 8. Species. Brown Spar. Sidero Calcite, Kirw. i. 105. Ze Spath Brunifant, Broch. i. 563. Chaux Carbonatee Fcrrifere PerlSe, Hauy, ii. 179. Exter. Char.—Found maffive or diflenainated, or in kidney (haped, globular, or carious pieces 3 very often cryftallized. The forms are lenfes or rhomboids, which latter have either convex or concave faces 3 double pyramids compofed of two pyramids with three obtufe faces : fimple three-fided pyramids, and oblique fix-fided pyramids. The furface of the cryftals drufy, rarely imooth 3 luftre weakly (hining or (hining 3 internal luftre ftiining, pearly, or vitreous; fra&ure foliated 3 fragments rhomboidal. Colour milk-white, grayiffi, yellowiffi, or reddiffi white ; bright ^ or browniffi red 3 tranllucent at the C c edges; 202 MINER Calcareous edges; femihard ; brittle, eafily frangible} ftreak , Senus- grayilb white. Spec. grav. 2.83. Chem. Char.—Becomes black and hard before the blow-pipe, and unlefs reduced to powder, effervefces {lowly with acids. ConJHtuent Parts. Bergman. Carbonate of lime, 50 Oxide of iron, 22 Oxide of manganefe, 28 Localities, &c.—Brown fpar is found in Bohemia, Saxony, France, Sweden, and Britain. It is ufually found in metallic veins. 9. Species. Dolomite. Id. Kirw\ i. in. Dolomie, Brochant, i. 534. Chaux Carbonatee Aluminifere, Haiiy, ii. 173. Exter. Char.—Found maffive j fraflure appears to be foliated 5 fragments blunt-edged. Colour graybh or yellow ilk white 5 tranducent on the edges } femihard 5 rather difficultly frangible ; feels meagre. Spec. grav. 2.85. Confliiuent Parts. Sauffure. Lime Alumina Magnefia Oxide of iron Carbonic acid Lofs 44.29 5.86 1.4 •74 46. 1.71 100.00 C'hem. Char.—Effervefces flowly in nitric acid. Phys. Char.—Phofphorefces in the dark by the per- cuffion of a hard body. Localities, &c.—This done was firft obferved by Dolomieu, amongjthe ancient monuments of Rome; and afterwards he difcovered iimilar ftones in the mountains of the Tyrol, and the Alps. It is found abundantly on St Gothard and other primitive mountains. Dolo- mieu’s attention was firft attrafted to it by its fupe- rior hardnefs and flow effervefcence in acids, and ana- lyfis ffiews that it is different from limeftone in its com- pofltion. 10. Species. Rhomb or Bitter Spar. Crystallised Muricalcite, Kirw. i. 92. Le Spath Mag- nejien, Brochant, i. 560. Chaux Carbonatee Mag- nefifere, Hairy, ii. 187. Exter. Char.—Found maffive or diffeminated in rhomboidal pieces, which have a cryflallized appear¬ ance •, luftre ihining or refplendent, and vitreous or pearly; fraflure foliated ; cleavage threefold ; fragments rhomboidal. Colour grayiffi white, yellowith or reddifli brown ; tranflucent at the edges; femihard ; brittle ; ftreak fnow-white. Spec. grav. 2.48. Chem. Char.—Becomes gray or brown before the A L O G Y. blow-pipe without fplitting or fufion. tie with acids. Part I. Effervefces a lit- Claffifica- Conjlituent Parts. Klaproth. Carbonate of lime magnefia Oxides of iron and manganefe 52 45 3 100 73 25 2 100 Localities, &c.—Found in the Tyrol and Saltzburg, and in Sweden. It is always accompanied with afbeftus, talc, and tremolite, and imbedded in chlorite fchiftus, ferpentine, and indurated talc. 11. Species. Swine Stone. Id. Kirwan, i. 89. La Pierre Puante, Brochant, i. 567. Chaux Carbonatee Fcetide, Haiiy, ii. 288. Exter. Char.—Found maffive ; internal luftre glim¬ mering or dull; frafture fplintery, fometimes earthy or foliated ; fragments fplintery. Colour grayiffi black, or blackifli brown ; opaque, rarely tranflucent at the edges; ftreak grayiffi white ; femihard, fometimes foft; eafily frangible. Spec. grav. 2.71. Phys. Char.—When rubbed with a hard body, it gives out a very foetid odour of rotten eggs. Chem. Char.—Soluble with effervefcence in nitric acid ; before the blow-pipe is deprived of its odour, which is fuppofed to be owing to fulphurated hy¬ drogen. Localities, &c.—Forms entire beds in ftratiform lime¬ ftone rocks, as in France, Saxony, and Sweden. 12. Species. Marl. This is divided into two fubfpecies ; 2^ indurated. earthy; and. Subfpecies 1. Earthy Marl. Id. Kirw. i. 74. La Marne Terreufe, Brochant, i. 569, Argile Calcar if ere, Haiiy, iv. 455. Exter. Char.—This variety is compofed of loofe or flightly coherent particles ; ftains a little ; feels meagre and rough ; is light ; almoft fwims on water. Colour yellowiffi gray, or grayiffi white. Localities, &c.—Found in many places of France and Germany, as well as in different places of England and Scotland, forming beds in limeftone countries, and often immediately under the foil. Cfes.—It is fometimes employed in the manufacture of pottery, but its principal ufe is for the purpofes of agriculture. Subfpecies 2. Indurated Marl. Id. Kirw’. i. 95. La Marne Endurcie, Brochant, i. 571. Exter. Char.—Found maffive ; dull, or flightly glim¬ mering ; frafture earthy, fplintery, or flaty ; fragments blunt-edged. Colour yellowiffi, or fmoke gray; opaque ; ftreak grayiffi white ; foft; not very brittle ; eafily frangible. Spec. grav. 1.6 to 2.8. Chem. I M I N E R A L O G Y. Part I. Claffifica- &hetn. Char.—Melts before the blow-pipe into a tion. grayith black Hag •, elfervefces brilkly with acids. Marl is confidered as a mixture of carbonate of lime and alumina j and according to the different proportions of thefe ingredients, it is denominated calcareous marl 'or clay marl, and fometimes it is known in agriculture by the names of foft and hard marl. Localities, &c.—Found in Bohemia, Saxony, Swe¬ den, Italy, France, and Britain, in ftratiform moun¬ tains, fometimes in extenfive beds, frequently accom¬ panying limeftone, coal, and bafalt. TJfes.—It is employed in agriculture for improving the foil, fometimes for building, and fometimes as a limeftone. It ferves alfo as a flux for fome ores of iron. 13. Species. Bituminous Marl Slate. Marno-bitumineux, Brochant, i. 574* Chaux Carbonatee Bituminifere, Haiiy, ii. 189. * Exter. Char.—Found maflive ; furface rough, dull, rarely glimmering j or when divided into curved plates, fmooth and fhining •, fra&ure flaty j ftraight or waved j fragments tabular. Colour grayifh or brownifh black ; opaque j ftreak {hining ; foft 5 eafily frangible ; feels rather meagre. Chem. Char.—Effervefces with acids j inflames be¬ fore the blow-pipe ; gives out a bituminous odour, and then melts into a black flag. Localities, &c.—Found in different places of Thu¬ ringia, in mountains of ftratiform limeftone, forming particular beds, which repofe frequently on a fpecies of fandftone. It is frequently mixed with different ores of copper, fo that it is fometimes wrought as a copper ore. In this bituminous fchiftus, petrified fifties and marine plants are frequently found, difpofed in regular order, from which fome have conjedtured that they muft have died a violent death •, or, according to others, that they have been poifoned by the copper with which it abounds. Chem, Char.—Thrown on hot coals it gives out a Calcareous greenifh phofphorefcent light*, infufible before the blow- , geiJ-1-* i pipe, but lofes its colour. It is almoft entirely foluble in nitric acid. Conjlituent Parts. Klaproth. Lime, _ 55 Phofphoric acid, 45 100 * Pkyf. Char.—Becomes eledlric by fridtion, but not by heat. Localities, &c.—Apatite is found in different place* of Germany, chiefly in tin mines, where it is accom¬ panied by fluor fpar, quartz, and metallic ores. It is alfo found in Cornwall in limilar circumftances. 15, Species. Asparagus Stone. La Pierre d'Afperge, Broch. i. 586. Chaux Plmfphatcc, Hairy, ii. 234. Exter. Char.—This mineral has been only found cryftallized in equiangular fix-fided prifms, terminated by a (lightly obtufe fix-fided pyramid j lateral edges fometimes truncated j lateral faces longitudinally (freak¬ ed, the others fmooth ; external luftre (hining or re- fplendent 3 internal, refplendent and refinous 3 fradfure foliated, crofs fradlure imperfedfly conchoidal 3 frag¬ ments n@t very (harp-edged. Colour afparagus green, greenilh white 3 commonly* tranfparent, often only femitranfparent, or even tranf- lucent 3 femihard. Spec. grav. 3.09. Chem. Char.—Infufible before the blow-pipe 3 folu¬ ble with effervefcence in nitric acid, but thrown on hot. coals does not phofphorefce. Conjlituent Parts. Vauquelin. 14. Species. Apatite. Phofpholite, Kirw. i. 128. DApatite Commune, Bro¬ chant, i. 580. Chaux Phofphatee, Hauy, ii. 234. Lime, . _ 53-32 Phofphoric acid, 45*7 2 Lofs, .^6 Exter Char.—Found almoft always cryftallized, rare¬ ly diileminated. The forms of its cryitals are, 1. A regu¬ lar fix-fided prifm 3 2. The fame prifm truncated on its lateral edges 3 3. AFo on its angles and terminal edges 3 4. Bevelled on each of the lateral edges ; 5. With an obtufe and regular fix-fided pyramid, and one or both extremities, the fummit being (lightly truncated 3 6. A three-fided prifm with the lateral edges bevelled, and the terminal edges truncated 3 7. A fix fided table, ha¬ ving its terminal edges ftrongly, and the lateral edges (lightly truncated. Lateral faces of the prifms longitudi¬ nally (freaked 3 faces of the pyramid fmooth 3 luftre (hining and refplendent ; internal luftre (hining, be¬ tween refinous and vitreous. Crofs fra£lure foliated 3 in other dire6fions fine grained, uneven, or conchoidal. Fragments rather (harp-edged. Colour green of various (hades, blue, fometimes pearl gray, and greenith gray 3 femitranfparent, fome¬ times tranfparent, or only tranflucent 3 femihard 3 is fcratched by fluor fpar 3 brittle, and eafily frangible. Spec. grav. 2.8 to 3.2. / 100.00 Localities, &c.—This (lone has been found at Ca- prera, near Cape de Gates in Spain, and alfo, it is faid, near Arendal in Norway. 16. Species. PHOSPHORITE. L'Apatite Terreufe, Broch. i. 584. Chaux Phofphatee Terreufe, Hairy, ii. 239. Exter. Char.—Found maflive, and having little co¬ herence 3 dull 3 frafture earthy, or fine grained uneven 5 fragments blunt-edged, fometimes wedge-ftiaped. Colour yellowifh or grayiftr white 3 opaque ; femi¬ hard 3 often friable 3 eafily frangible 3 feels meagre. Spec. grav. 2.82. Chetn. Char.—Before the blow-pipe it phofphorefces, and according to fome, melts into a white glafs, but according to others, infufible. Soluble in acids, and with fulphuric acid gives out white vapours. C c 2 Confituent 204- Calcareous genus. Con/jituetit Paris. Lime Silica Phofphoric acid Fluoric acid Carbonic acid Muriatic acid Oxide of iron M I N E R A L O G Y. its angles a three-fided pyramid, correfponding to tlie faces of tire cube. 2. The octahedron, vyhich is either Part I. Pelletier. 59 2 34 2 I 100.0 Localities, &c.-— This mineral is found in the pro¬ vince of Efhemadura in Spain, where it forms an en¬ tire mountain. It is mixed with quartz ; has been long hnorvn by the inhabitants of the country for its pro¬ perty of phofphorefcing when thrown on hot coals. 17. Species. Fluor. i his has been divided in to three fubfpecies: I. earthy; 2. compaft j and, 3. fluor fpar. Subfpecies 1. Earthy Fluor. Sandy or Earthy Fluor, Kirw. i. 126. Le Fluor Ter- rcux, Broch. i. 593. Chaux Fluatee Amorphe, Haity, n. 260. Exter. Cnar.—Is compofed of particles which are nightly cohering ; dull, or fcarcely glimmering. ^Colour greemlh white, fometimes bluifh green 5 flains a little ; feels rough. Chem. Char.— I brown on hot coals, it gives out a bluifh green light. Localities, &c.— Idas been found in Hungary, in a vein accompanied with quartz. Subfpecies 2. Compact Fluor. Id. Kirw. i. 127. Id. Broch. i. 594. . Extcr- Char.—\s found maffive j dull, luftre fome¬ times glimmering, vitreous; frafture even, conchoidal, and rarely fphntery ; fragments fliarp-edgcd. Colour greenifh gray, or greenilh white; fometimes ditterent colours are difpofed in fpots; tranflucent ; Break Ihinmg ; hard, and brittle. Chem. Phofphorefces on hot coals. . Localities, &c.— I his mineral is found in the Hartz, m Sweden, and Siberia, always accompanying fluor Subfpecics 3. Fluor Spar. Foliated or Sparry Fluor, Kirw. i. 127. Le Spaih Fluor, Broch. i. 595* Chaux F/uatee, Hauy? ii, 247. FJfen. Char.—Infoluble in water, and divifible into a iTgular oftahedron. Exter' Char.—FEor fpar is found maflive or diflemi- nated, but moft frequently cryftallized. Primitive form a regular octahedron, which is eafily obtained by me¬ chanical divifion ; integrant molecule a regular tetra- hedron. The ufual forms are, j. The cube, which is eitner perfeC, or with truncated edges or truncated angles, or with the edges bevelled, having on each of peritci, or has it angles or its td es, or b*th, trunca¬ te! Surface of the cryilals imooth, fhining or re- fplendent, fometimes drufy ; internal luitre fhining, re- fplendent, and vitreous or pearly ; fracture foliated ftraight or curved ; cleavage fourfold, in the diieftion of the faces of the regular oCfahedrOn ; fragments tetra¬ hedral, or rhomboidal. Colours of riuor fpar extremely various and beautiful. The principal are, greenifh white, grayiik, or yellow- 1,11 ’ o^ie, green, brown, and red, of various ihades ;• and different colours are fometimes arranged in flripes and fpots. Moft commonly tranflucent, fometimes tranfparent, or only tranflucent at the edges. Semi- hard ; brittle ; eafily frangible. Spec. grav. 3.09 to 3 • * 9* them. Char.—Fufible before the blowr-pipe into a tran fparent glafs; decrepitates when heated. The pow¬ der thrown on hot coals gives out a bluifh or greenifh phofphoreicent light; and two pieces rubbed againif eacn other, (bine in the dark. Coujiituent Parts. Lime Fluoric acid Water Scheele, 57 16 27 100 Localities, &c.—Fluor fpar is fometimes found in beds, but moft frequently in mineral veins. It is very common in many places of the world, particularly in Cornwall and Derbyfhire, and alfo in the counties of Durham and Cumberland in England ; at Chamouni in Savoy, the octahedral variety of a rofe red colour is found. Fluor fpar is found alfo in the interior part of Aberdeenfhire in Scotland. —This mineral is fuccefsfully employed as a flux for different metallic ores. As it is fufceptible of a fine polifh, it is cut and formed into a great variety of or¬ namental obje&s, as pyramids, vales, &c. which, on account of the beauty of the colours, are greatly efteemed. 18. Species. Gypsum. I his fpeciesis divided into four fubfpecies : 1. earthy* 2. compact ; 3. foliated ; and, 4. fibrous. Subfpecies 1. Earthy Gypsum. Farinaceous Gypfum,^ Kirw. i. 120. Lc Gypfe Terreux, Bioch. i. 601. Chaux Sulphatee Terreuje, Hauy, ii. 278. Exter. Char.—This is compofed of particles which are more or lefs cohering ; dull, in fome places weakly glimmering ; feels meagre and rough. Colour white, gray, or yellowifb. Localities, &c.—This fubftance is rare; it is only found in the fiffures and cavities of gypfum rocks, and is fuppofed to be a depofition of loofe particles of gvp- fum, carried along by water. Found in Saxony, °and Mont Martre near Paris. Subfpecies Part I. MINERALOGY. Id. Kirvt'. I. I 21 278. Id. Broch. i. 602. Id. Hauy, ii. Broad Foliated Gypfum, Kirw. i. 123. la Selenite, Broch. i. 609. Chaux Sulfatce, Hauy, ii. 266. Exter. Char.—Found mafftve ; luflre weakly glim¬ mering, almoft dull ; frafture compadt, even, or fplin- tery j fragments blunt-edged. Colour yellowifh and grayidi wdiite, fometimes red- dilh ; and different colours exhibit ftripes 5 tranflucent at the edges 5 loft, and eafily frangible. Spec. grav. about 2.3. Localities, &c.—Found in Italy, Germany, France, Spain, and England. Subfpecies 3. Foliated Gypsum. Granularly Foliated Gypfum, Kirw. i. 123. Id. Brcch. i. 606. Exter. Char.—Found mafiive or diffeminated, and fometimes, it is faid, cryffallized in fix-lided prifms, obtufely bevelled at each extremity 5 luftre glimmering or fhining, between vitreous and pearly j frafture fo¬ liated, foraetimes radiated j fragments blunt edged. Colour ufually fnowr white, grayifh, yellowifh, or reddilh white ; and feveral colours are arranged in fpots, flripes, and veins. Tranflucent, rarely feraitranf- parent 5 refraction 'double j very foft j eafily frangible. Spec. grav. 2.27 to 2.31. Foliated gypfum has fome refemblance to granular limeftone, but may be readily diftinguifhed from it by its foftnefs. Subfpecies 4. Fibrous Gypsum. Id. Kirw. 3. 122. Id. Broch. i. 604. Id. Hauy, ii. 278. Exter. Char.—This is found maflive, but in thin layers ; lulfre Ihining, or weakly fhining, pearly ; frac¬ ture fibrous 5 in fome varieties the longitudinal fradfure is foliated j crofs fradlute fibrous 5 fragments long, fplintery. Colour fhow white, grayifh, yellowifh, or reddifh white •, tranflucent; very foft •, ealily frangible. Chem. Char.—The different varieties of gypfum pof- fefs nearly the fame chemical chara&ers. When purb, there is no effervefcence with acids. Before the blow- pipe gypfum immediately becomes white, is converted into a white enamel, which, at the end of 24 hours, falls into powder. Localities, See.—Gypfum, in general, conftitutes mountains or beds, which are fubordinate to fandflone, or limeftone. It is found in all kinds of rocks. Gyp- iurn is found in great abundance in the neighbour¬ hood of Paris, in feveral parts of England, but Sparing¬ ly in Scotland. Efes.—Gypfum is employed along with lime as a ce¬ ment. It is alfo very extenfively employed under the name of plafter of Paris, for making cafts and models. With this view it is expofed to a ftrong heat, to drive off the water of cryftallization. It is then in the ftate of powder, which being again mixed with water, is put into the mould in the form of pafte ; and, from its firong affinity for water, it foon becomes folid. EJfen. Char.—Divifible into fmooth plates, which break under angles of 1130 and 67°. Exter. Char.—Selenite is found maflive 5 and frequent¬ ly alfo cryftallized. The primitive form of its cryftals is a four-fided prifm, whofe bafes are oblique parallelo¬ grams 5 the integrant molecule is the fame. The ufual forms are, a fix-fided prifm, having two broad and two narrow faces, and terminated by an oblique bevelment, whofe fidcs correfpond to the broad fides of the prifm ; a fimilar prifm terminated by a four-fided pyramid ; double cryftals compofed of two of the former united by their fmaller lateral faces, fo that the fummits united form on one fide a falient angle, and on the other a re¬ entering angle j another form is a Spheroidal or conic lens. Thefe cryftals are often grouped, divergent, faf- cicular, or ftellated ; and of the fix Tides of the prifm, the two oppofite are fmooth, and the four others longi¬ tudinally ftreaked 5 luftre refplendent or fhining, be tween vitreous and pearly ; fraclure foliated, ftraight or curved ; cleavage threefold ; fragments rhomboidal, with two faces fmooth and ftiining, and two others ftreaked. Colour ufually white, grayifh, yellowifli, or fnovc white, fometimes iridefcent j tranfparent, fometimes on¬ ly tranflucent *, very foft ; in thin plates, flexible, but not elaftic ; eafily frangible. Spec. grav. 2.32, Chem. Char.—Before the blow-pipe more eafily full— ble than gypfutn, and fplits into thin platss. Conjlituent Parts. Bergman. Lime 32 Sulphuric acid 46 Water 22 100 Localities, Sec.—Selenite is found among beds of gypfum, and particularly among thofe which alternate with clay and fand ftone. It is alfo found in nefts in clay. It is not uncommon in many places, as among the gypfum rocks near Paris, in different parts of Eng¬ land, and at Lord Glafgow’s coal works in Scotland, whete it is found among clay, and in the cavities or on the furface of the limeftone which repofes on the ftrata of coal. Ufes.—Selenite alfo, after calcination, is employed in modelling ; but it is faid that it poffeffes lefs folidity than what is obtained from gypfum. 20. Species. Anhydrite. Chaux Sulfatee Anhydre, Hauy, iv. 348. Exter. Char.—This mineral is found maflive ; luftfe fhining or weakly finning, and pearly •, fra£ture curved foliated, fometimes radiated, and fine fplintery : frag¬ ments fharp-edged j tranflucent •, femihard-5 not very brittle, rather eafily frangible. Spec. grav. 2.964. Chem. Char.—Before^the blow-pipe it neither exfoli¬ ates nor becomes white, like felenit#. / ConJHtuent MINER ConjUtuent Parts. Vauquelim Klaproth. Lime, 40 42. Sulphuric acid, 60 57. Otide ol iron, — .1 Silica, — .25 Lofs, — .65 100 100.00 Localities, &c.—This mineral has been found in Switzerland, in the fait pits in the canton of Berne. 21. Species. Cube Spar. Chaux Su/fatce Anhjdre, Hauy, iv. 348. Sonde Muri- atee Gypjifere, Id. ii. 365- Muriacite, Klaproth. Exter. Char.—This mineral is found maffive, and al- fo cryflallized, in four-fided prifms, which are nearly cubical ; two of the oppofite lateral faces are broader than the other two. The lateral edges are fometimes truncated, and hence arifes an eightdided prifm : fome¬ times alfo the truncations are fo great as to deltroy the narrow7 lateral faces, and form again a fix-fided prifm. External lultre of the broad faces refplendent and pear¬ ly ; of the narrow', fhining. Internal luftre (hining and pearly; fraflure foliated j cleavage threefold; frag¬ ments cubical. Colour milk-white, grayifh, yellowifh, and reddifh white ; fometimes pearl gray 5 tranflucent $ femihard. Spec. grav. 2.92 to 2.96. Conftituent Parts. Sulphate of lime, Carbonate of lime, Muriate of foda, Klaproth. 57-8 11. 31.2 100.0 Localities, &c.—Found in the fait pits at Halle in the Tyrol, where it is called fplintery gypfum. 22. Species. Datholite. Chaux Datholite, Brongniart, ii. 397. Chaux Borate'e Si- liceufe, Hauy. Exter. Char.—This mineral has only been found cryilallized ; the primitive form is a rectangular prifm, with rhomboidal bafes, whofe angles are 109° iS7 and 70° 42' 5 luftre fttining, vitreous j fragments conchoi- dal. Colour grayilh or greenifti white j tranflucent j fcratches fluor fpar. Spec. grav. 2.98. Chem. Char.—In the flame of a candle it becomes dull white, and is eafily reduced to pow'der. Before the blow pipe it melts into a glafs of a pale rofe-red colour. Conjliluent Parts. Lime, Silica, Boracic acid, Water, 1 Klaproth. 35- 5 36- 5 24. 4- 100.00 A L O G Y. Part I. Localities, &c.—Found near Arendal in Norway, Claffifica- and fame fpecimens are accompanied by greenifti co- loured, foliated talc. ' VII. BARYTIC Genus. 1. Species. Witherite, or Carbonate of Barytes. Barolite, or Aerated Barytes, Iflrw. i. 134. La Wi. therite, Brochant, i. 613. Baryte Carbonatee, Hairy, ii. 308. . Lffen. Char.—Forming a white precipitate in weak nitric acid before folution. Exter. Char.—Found maflive, or diffeminated, rarely cryftallized j forms of its cryftals are, a fix-fided prifm, with a fix-fided pyramid fet on the lateral faces; the fame prifm having all the angles truncated ; a double fix-fided pyramid. The cryftals, which are fmall, are ufually imbedded in the mineral itfelf; fometimes group¬ ed in bundles, or crofting each other. Surface fmoothj luftre of the principal fratlure fhining, or weakly ftiining, refinous ; fraClure between radiated and fol/ated ; crofs frafture finegrained uneven 5 fragments wedge-fhaped. Colour yellowifti gray, grayilh, or yellowifh white ; tranflucent, or femitranfparent j femihard, or foft j brittle 5 eafily frangible. Spec. grav. 4.3 104.33. Chem. Char.—Infufible according to Hauy, before the blow'-pipe; but according to Brochant, melts before the blow-pipe to a white enamel. Conjlituent Parts. Pelletier. Barytes, 62 Carbonic acid, 22 Water, 16 IOO Vauquelin. 74-5 *S-S 100.0 Conflituent Parts according to Klaproth, Carbonate of barytes, 98.246 Carbonate of ftrontites, I*7C3 Alumina iron, .043 Carbonate of copper, .008 100.000 Localities, &c.—This mineral was difcovered by Dr Withering at Anglefark in Lancafhire, in lead veins, which traverfe the coal ftrata, and it is accompanied with heavy fpar and blende. Barytes adfs as a ftrong poifon on the animal economy. It has been long employed at Anglefark for the purpofe of deftroying rats. It has alfo been tried as a medicine in fcrofula, but feemingly with little efteft j and it ought to be had recourfe to with extreme caution. 2. Species. Heavy Spar, or Sulphate of Barytes. This fpecies has been divided in eight fubfpecies $ earthy, compadt, granular, foliated, common, columnar prifmatic, and bolognian. ' Subfpecies 1. Earthy Heavy Spar. Earthy Barofelenite, Kirw. i. 138. Le Spath Pefant Terreux, Brochant, i, 617. Exter. \ Part T. MINER Exter. Char,—Found maflive ; luftre fcarcely glim¬ mering, or dull, confifts of earthy particles, which are (lightly cohering ; ftains a little j feels meagre. Colour fnow white, grayifh, yellowith, or reddifh white. Localities. &.C.—This a rare mineral. It has been found in Saxony, covering maffes of heavy fpar, and al- fo in Derbyfhire and Stafforddiire in England. Subfpecies 2. Compact Heavy Spar. CornpaB Barofelenite, Kirw. i. 138. Baryte Sulfatee CompaBe, Hauy, ii. 303. Id. Broch. i. 618. Exter. Char.—Found maffive, fometimes in kidney- form or globular pieces, with cubical impreffions ; luftre glimmering, fometimes dull, and fometimes wTeakly (hin- ing •, fraflure coarfe earthy, fometimes uneven 5 frag¬ ments not very (harp-edged. Colour yellowhh, grayirti wThite, fometimes pale fle(h red 5 opaque, or tranflucent at the edges j foft ; not very brittle $ ealily frangible ; feels meagre. Localities, &c.—Found in mineral veins in Saxony, and in England 5 in clay (late, in Savoy ; and we have found it in fand (lone in Northumberland, Subfpecies 3. Granular Heavy Spar. Exter. Char.—This alfo is found maffive $ luftre glimmering, nearly (Inning, and pearly ; frafture foli¬ ated, or fplintery •, fragments blunt-edged. Colour fnow-white, milk-white, yellowiffi, or red- diffi 5 tranftucent j foft ; not very brittle j eafily fran¬ gible. Spec. grav. 3.8. Conftituent Parts. Klaproth. Barytes, 60 Sulphuric acid, 30 Silica, 16 . K 100 A L O G i. 207 four-fided prifm, re&angular or oblique ; 3. A four- Barytic fided table, rectangular or oblique •, 4. A fix-fided ^e^us~ . prifm j 5. A fix-fided table ; and 6. A long eight- (ided table. d'hefe forms are varioufty modified by truncations and bevelments, and they are differently grouped together ; the prifms crofs one another 5 the tables are attached by their lateral faces, and form glo¬ bular or kidney-fhaped groups ; furfaces fmooth, fome¬ times rough and drufy. Luftre refplendent, (hining, glimmering, or only dull: internal luftre (Inning or re¬ fplendent, between pearly and refinous : fraCture ftraight foliated j cleavage threefold $ fragments fome- what rhomboidal. Colour commonly white, fnow-white, milk-white, grayiffi, yellowiih, or reddiih *, in malfes tranflucent ; in cryftals tranfparent or femitranfparent *, refra&ion double ; foft j brittle. Spec. grav. 4.29 to 4.47, and 4-5- . . Chem. Char.—Fufible before the blow-pipe into a folid white enamel, which being moiftened, gives out the odour of fulphurated hydrogen. Does not effer- vefce with acids. Conjlituent Parts. Withering. Bergman. Barytes, 67.2 84 Sulphuric acid, 32 8 13 Water, - 3 100.0 IOO Localities, &c.—This is a very common mineral, and particularly in metallic veins that traverfe primi¬ tive mountains. It accompanies ores of filver, copper, lead, and cobalt, as well as fluor fpar, calcareous fpar, and quartz. Subfpecies 6. Columnar Heavy Spar. Le Spath Pejant en Barres, Broch. i. 631. Baryte Sulphatee Bacillaire, Hauy, ii. 302, Localities, &c.—Found in mineral veins in Saxony, along with galena, and in Siberia, accompanied by cop¬ per and filver ores. Subfpecies 4. Foliated Heavy Spar. Exter. Char.—Found maffive, and in kidney-ffiaped, globular and cellular pieces, compofed of four-fided tables, or lenfes, with a drufy furface ; luftre glimmer¬ ing or (hining, between pearly and vitreous; fradure curved foliated, fometimes fplintery ; fragments not •v^ery (harp-edged, fometimes wedge-ffiaped. Colour yellowiffi, reddiffi, or grayiffi white, fome¬ times fleffi or browniffi red ; tranflucent *, foft ; not very brittle ; eafily frangible. Localities, &c.—Is not uncommon in mineral veins ; fometimes alfo in beds, in many countries. It is alfo found in Britain. Subfpecies 5. Common Heavy Spar. Foliated Barofelenite, Kirw. i. 140. Broch. i. 624. Exter. Char.-—This mineral is found in mafles, or diffeminated, and very often cryftallized. Its princi¬ pal forms are } 1. A double four-fided pyramid 5 2. A Exter. Char.—Found always cryftallized : 1. In o- blique four-fided prifms 5 2. The fame prifm terminated by an acute bevelment ; 3. The fame prifm terminated by a four fided pyramid placed on the lateral edges j and 4. A fix-fided prifm bevelled at the extremity. The cryftals are acicular, and are grouped together in bun¬ dles 5 furface (hining, or weakly (hiningj internal luftre ffiining ; longitudinal fra&ure radiated } crofs fradlure even. Fragments rhomboidal. Colour filvery, grayiflx, or greeniffi white 5 tranflu¬ cent ; foft, and brittle. localities, &c.—Found in Saxony, and Derbyffiire in England, accompanied by other varieties of heavy fpar, quartz, and fluor fpar. Subfpecies 7. Prismatic Heavy Spar. Exter. Char.—Found maflive, and frequently cry-, (lallized. TJie ufual forms are, 1. An oblique four-fid¬ ed prifm, bevelled at the extremities ; 2. An oblique four-fided prifm, terminated by a four-fided pyramid placed on the lateral edges ; 3. An elongated octahe¬ dron and 4. A fix-fided prifm. Luftre ffiining or re¬ fplendent, between refinous and pearly , fraClure foliate ed j cleavage threefold. Colour 208 MINER Strontian Colour yellow)(li, greenifli, or pearl gray, fometimes , £enus- pale blue, and rarely tlefh red 5 tranflucent ; when cry- flallized, tranfparent 5 foft, and not very brittle 5 very eafily frangible. Localities, &c.-»Sometimes found in mineral veins, as in Saxony. Subfpecies 8. Bolognian Heavy Spar. Le Spath de Bolo^ne, Brochant, i. 633. Striated or Jibrous heavy fpar, Kirwan, i. 141. Barytefulfatee radie'e, Hauy ii. 302. Exter. Char.—This is found in rounded pieces; ex¬ ternal furface uneven, dull, or glimmering $ internal lullre (hining, or weakly finning, between adamantine and pearly 5 fradlure radiated, parallel, diverging, or fibrous, fometimes foliated j fragments fplintery, fome¬ times rhomboidal. Colour, fmoke or yellowifh gray ; tranfiucent, foft, very brittle, and eafily frangible. Chem. Char.—This mineral has been long known by its property of fhining in the dark, after being heated. Other heavy fpars^ indeed, have a fimilar pro¬ perty. Conjlituent Parts. Arvidfon. Sulphate of barytes 62. Silica 13. Alumina I4-75 Gypfum 6. Oxide of iron .25 Water 2. 100.00 Localities, &c.—This mineral is found at Monte Paterno near Bologna in Italy, in rounded maffes, which have an uneven furface : they are imbedded in an argillaceous or marly rock, wTich is a kind of amyg¬ daloid, and from wdiich they are detached by the ac¬ tion of the waters. VIII. STRONTIAN Genus. 1. Species. Strontites, Carbonate. La SIrontianite, Brochant, i. 637. Id. Kirwr. i. 332. Strontiane Carbonatee, Hauy, ii. 327. EJfen. Char.—Soluble in nitric acid w'ith effervef- cence \ paper dipped in the folution, and dried, burns with a purple flame. Exter. Char.—Found maffive, and fometimes cry- flallized in needles, which are grouped together j form of the cryftals a regular fix-fided prifm ; luftre weakly fhining, or'only glimmerings internal luftre fhining, and weakly fhining, between refinous and pear¬ ly ; frafture radiated, ftraight, diverging, or fibrous; crofs fra&ure fine grained, uneven, or fplintery j frag¬ ments wedge-fliaped, or fharp edged. Colour afparagus green, greenifh, whitifh, or yel¬ lowifh gray •, tranflucent ; femihard, brittle and eafily frangible; feels a little greafy. Spec. grav. 3.4 to 3.67. Chem. Char.—Before the blow-pipe whitens without fufion, and afterwards expofed to the air, falls to pow¬ der. A L o G Y. ConJHtuent Parts. . Klaproth. Pelletier. Strontites 69.5 62 Carbonic acid 30. 30 Water .5 8 100.0 100 Localities, &c.-—This mineral has been hitherto found only at Strontian in Scotland, in a lead vein which traverfes a gneifs rock. It is faid alfo to have been found at Leadhills. 2. Species. Celestine, Sulphate of Strontites. La Celejline, Brochant, i. 640. Strontiane fulfaice, Hauy, ii. 313. EJfen. Char.—Divifible into a rhomboidal prifm, with angles of about 105° and 730 ; gives a light red colour to the blue part of the flame produced by the blow-pipe. Exter. Char.—Primitive form of its cryftals a iCft- angular prifm, whofe bafessre rhombs } integrant mole¬ cule a triangular prifm with fquare bales. The forms under which it generally appears are four or fix-fided prifms, which are terminated by a two ficled bevelment, a four-fided, or an eight-fided pyramid. This fpecies has been divided into two fubfpecies : I. fibrous j and, 2. foliated. Subfpecies 1. Fibrous Celestine. Exter. Char.—Found maflive or cryftallized ; luftre of the longitudinal frafture fhining 5 that of the crofs fra£lure, weakly fhining between pearly and refinous. Longitudinal fradlure foliated j crofs frafture fibrous, curved 5 fragments fplintery ; rather blunt-edged. Colour indigo blue, bluifh gray, and fometimes with whitifh bands, or with yellovvifh brown fpots ; tranflu¬ cent j foft, and eafily frangible. Spec. grav. 3.83. Confiluent Parts. Klaproth. Strontites 58 Sulphuric acid and oxide of iron 42 ICO L.ocalilies, &c.—Has been found in Pennfylvania in America, and near Toul in France. Subfpecies 2. Foliated Celestine. Exter. Char.—This is alfo found maflive and cryftal¬ lized 5 luftre weakly fliining, or fhining j that of th# cryftals refplendent j fra&ure foliated, ftraight, or radi¬ ated •, cleavage three-fold. Colour milk-white, grayifh, and bluifh-white j femi- tranfparent, or tranflucent} femi-hard 5 very eafily fran¬ gible. The following are the conftituent parts of a variety of fulphate of flrontites, which is found at Mont Mar- tre near Paris. Sulphate of ftrontites Carbonate of lime Oxide of iron 91.42 8-3 3 •25 100.00 * Locahties, ^ 2 Part I. M I N E R A Localities, &c.—This variety is found in great abun¬ dance near Briftol in England, where the fulphate of ftrontites was firrt difcovered by Mr Clayfield. It has been fince found in Sicily, where it is accompanied with fibrous'gypfum and native fulphur. SECOND CLASS. SALTS. 1. Genus. SULPHATES. i. Species. Native Vitriol. Mixed vitriol, or fulphate of iron, copper and •zinc. Kirwan, ii. 24. Vitrcol Natif, Brochant, ii. 2. Exter. Char.—This mineral is found maffive or dif- feminated, and alfo in a flalaftitical, cylindrical, and capillary form : internal luftre thining, or weakly fhin- ing, betvveen filky and vitreous j external furface rough and uneven j fradture ulually fibrous, fometimes foliat¬ ed. Colour grayifii, or yellowifh white, fometimes differ¬ ent (hades of fey blue ; the colour varies by expofure to the air. Soft ; femi-tranfparent or tranflucent j tafle four and aftringent. Chem. Char.—Thefe are different, according to the proportions of the conftituent parts. Before the blow¬ pipe, fulphurated hydrogen gas is given out j the Iron is detected by giving a black colour to the folution of nut galls j the copper, by immerfing a plate of iron 5 and the zinc, by a white efflorefcence, which appears wrhen the native fait is expofed to the air. This fubitance is a mixed fait, compofed of the ful- phates of iron, zinc and copper, in variable propor¬ tions, fo that its appearance and charafters muff alfo be variable. Localities, &c.—Native vitriol is not uncommon in mountains of clay date which contain metallic ores, and particularly thofe of copper and iron pyrites, and blende j by the decompofition of which it is formed. It is found in Bohemia, Saxony, and Hungary, as well as in the mines of Britain, where fuch metallic ores a- bound. The native fulphate of iron is common in coal mines which contain iron pyrites, as in many of the coal mines of Britain. This fubftance is very abundant in the earl of Glafgow’s coal mines near Paifley, where the manufa£ture of copperas, by purifying and cryftallizing the native fait, has been long car¬ ried on. Vfes.—The mixed fubftance, native vitriol, can only be employed to any ufeful purpofe, by obtaining the different falts in a feparate form. The ufes of thefe falts are well known in various arts, but particularly in dyeing, and fume of them in medicine. 2. Species. Native Alum. Alum, Kirw^an ii. 13. VAlun Natf Brochant, ii. 6. Alumine Sulfatee alkaline, Hauy, ii. 387, 388. Exter. Char.—Native alum is ufually found in fmall capillary cryftals, fometimes adhering to other minerals, and very rarely in ftaladlitical maffes. The form of the cryilal of alum is the regular octahedron, which is ufually obtained artificially. Externally it is dull, or {lightly glimmering, but internally fhining, with a Vol. XLV. Part I. LOGY. filky or vitreous luftre j fraCture fibrous; very foft j tafte aftringent. Chem. Char.—Before the blow-pipe melts eafily in its water of cryftallization, then froths up, and becomes a white fpongy mafs. Alum is a triple fait, a fulphate of alumina and potafti. It rarely happens that all the three ingredi¬ ents exift together in nature. The potafh is ufually added during the preparation of artificial alum. According to the examination of native alum by Klaproth, from the alum cavern at Cape Mifeno near Naples, it appears that from 1000 lbs. of the material furnifhed by nature, 470 lbs. may be obtained, having the requifite quantity of potafh ; and by an addition of potafh to promote the cryftallization, 290 lbs. more may be obtained. Analyt. EJf. i. 268. I he following is the analyfis of the aluminous fchiftus from Freyen- tvalde by the fame chemift. Alumina I5-25 Oxide of iron 7.50 Potafh .25 Sulphuric acid and w’ater of cryftallization 77. IOO.OO* * Analyt. Localities, &c.—Native alum is found in thofe pi a- A" ' ’ ces w'here the aluminous {tones, already deferibed, a- bound, as in the neighbourhood of volcanoes, and in coal mines. An extenfive alum manufactory has been carried on for feveral years with great (kill and fuccefs, at Lord Glafgow’s coal work near Paifley, mentioned above. The materials are obtained from the rubbifh in the old waftes, which confifts of the aluminous fchiftus from the roof and pavement of the coal. Thefe mines alfo abound with iron pyrites •, and from the decompo¬ fition of all thefe fubtlances the native vitriol and na¬ tive alum are obtained. Ufes.—The ufes of alum in various arts are too well known to require any enumeration. 3. Species. Mountain Butter. La Beurre de Montague, Broch. ii. 10. Exter. Char.—Found maffive ; internal luftre ftrong- ly glimmering, waxy j fraCture foliated j fragments blunt-edged. Colour grayifli white, fulphur yellow, or yellowifli browm ) tranflucent at the edges; feels greafy 5 tafte aftringent. localities, &c.—This fpecies is found in fimilar fitu- ations w^fch the former. In its native repofitory it is nearly as foft as butter, and has fomething of the ap¬ pearance, from which it has its name. Perhaps it ought to be confidered merely as a variety of the former. The fame remark may be applied to another variety called phamofe alum. 4. Species. Capillary Salt. Sulphate of Magnefa. Le Sel Capillaire, Broch. ii. 8. Haar Salz, or Hair Salt, of the Germans. Exter. Char.—This fait is always found in fine capil¬ lary cryftals, fo clofely united together as to form a compaCt mafs; luftre {hining, or weakly fhining, filky $ raCture fibrous. D d Colour 2io MINE R SaIts- Colour white, forr.etrmes greenilh, grayifh, or yellovv- iH) j tranflucent, friable j talle aftringent. Conflituent Parts.—This fait was fuppofed to be a plutnofe or native alum j but it appears from the analyfis of Klaproth, to be a fulphate of magnefia, with a Imall proportion of iron. We have examined a fimilar ca¬ pillary fait from the coal mines near Paifley, which alfo appeared to be a fulphate of magnefia, but with a greater proportion of fulphate of iron. Localities, &c.—This native fait is found in fimilar fituations with the former fpecies. 5. Species. Native Epsom Salt, or Sulphate of Magnejia. Le Sel amer Natif Broch. ii. 11. Epfom Salt, Kir. ii. 12. Exter. Char.—"The. charafters already given of the former fpecies are equally applicable to this, except¬ ing that it is faid to exift fometimes in an earthy form, when it has a dull appearance. Localities, &c.—Found in a date of efflorefcence on limelfone, porphyry, fandftones j and it exifls in folu- tion in many mineral waters, as in that of Epfom in England, from which it has its name. This fait alfo conftitutes part of the efflorefcence which is obferved on walls built with lime. A L O G Y. lucent j foft} eafily frangible cooling. Conjlituent Parts. Nitrate of potafh Muriate of potafh Sulphate of lime Carbonate of lime Lofs Part I. or friable j tafle fpline Claffifica- tion. Klaproth. 42-55 .20 25-45 30-4° 1.40 IOO.QO f Exter. Char, 8tc,—Native nitre is found in Italy near Molfetta, in Naples, from which that analyzed by Klaproth was obtained, and which is dilpofed in fmall beds, or more rarely in veins, on limeflone. Na¬ tive nitre is alfo not uncommon in Hungary, Spain, France, and Peru, in which latter country, and in the Eafl Indies, where it is very abundant, it is found ef- florefcent on the furface of the ground at certain feafons of the year. Ufes.— 1 he ufes of nitre for fome economical pur- pofes, in various arts, in medicine, but particularly in the manufafture of gun-powder, are well known. f Analyt. EJ. i. 27®. III. Genus. MURIATES. 6. Species. Native Glauber Salt, or Sulphate of Soda. Glauber Salt, Kirw. ii. 9. Le Sel de Glauber Natf Broch. ii. 14. Exier. Char.—This fait is fometimes found maffive or earthy, rarely ftalaftitical or cryflallized. The cryftals are often acicular, or in irregular, fix-fided prifms, ter¬ minated by a three-fided pyramid, placed on the lateral edges or Tides. Luflre finning, vitreous; but expofed to the air becomes dull. Frafture uneven j that of the cryftals conchoidal. Fragments blunt-edged. Colour yellowifh or grayifh white ; opaque or tranf- parentj brittle 5 tafte cooling or bitter. Localities, &c.—This fait is ufually found in the neighbourhood of mineral fprings which hold common fait in folution, from the decompofttion of rvhich, and the combination of its bafe with fulphuric acid, it is ob¬ tained. It is not unfrequent on the banks of fait lakes, and in a ftate of efflorefcence on fandftone, marl, fome¬ times on the furface of the ground, and fometimes on ivills built with lime and mortar. It is found in moft countries in the w-orld. II. Genus. NITRATES. j. Species. Rock Salt. Common Salt, Sal Gem, Kirw. ii. 31. Le Sel de Cui- fne, Broch. ii. 20. Soude Munatee, Flauy, ii 356. Efjen. Char.—Soluble in water, and divifible into cubes. This fpecies is divided into two fubfpecies; 1. folia¬ ted, and 2. fibrous rock fait. Subfpecies 1. Foliated Rock Salt. Le Sel Gemme Lamelleux, Broch. ii. 21. Lamellar Sal Gem, Kirw. ii 32. Soude Muriatee Amorphe, Hauy, 359- Exter, Char.—Uiually found maflive in confiderable beds, fometimes diflemimated in large maffes, or kidney- form, ftalaftitical, or cryitallized in perfeft cubes; fur¬ face of the cryftals fmooth j luflre fhining, vitreous j frac¬ ture foliated 5 cleavage threefold and reftangular j frag¬ ments cubic. Colour grayifh, yellowilh, or reddiffl white, flefh or brownifh red ; tranfparent or tranflucent 5 foft j ftreak grayiih wdiite ; taile faline, Chem. Char.— Ihis fait decrepitates violently w’hen thrown on burning coals. 1. Species. Native Nitre, or Nitrate of Potafj. Nitre. Kirw. ii. 25. Le Nitre Natif, Broch. ii. 17. Po- tajfe Nitratee, Hauy, ii. 346. Saltpetre. Efjen. Char. Does not deliquefee, and detonates with a combufiible body. Exter. Char.— 1 his fait is commonly found fuperficial, in acicular cryftals, rarely maflive, and more rarely cry- ftallized in fix-fided prifms 5 luftre fhining, vitreous j frafture co'nchoidal; fragments fharp-edged. Colour fnow white, grayiih or yellowifh whitey tramf- Confituent Parts. Kirwan. Bergman. Soda . 35 42 Muriatic acid 40 52 Water 25 6 100 100 The above are the analyfes of pure fait j for as it is found in nature, it contains feveral other ingredients. Localities, &c.—Foliated rock fait conftitutes a pe¬ culiar kind of ftratiform mountain, in which it ufu¬ ally Part T. MINERALOGY. 2 f r Claffifiea- ally alternates with beds of clay, which are more or tlon‘ lefs penetrated with fait. It is alfo accompanied with gypfum, fandftone, limeftone. It is fometimes alfo found in veins. Rock fait is found in mofi: countries of the world ; the mofl; celebrated mines are thofe of Wiliczka, which have been wrought for 500 years. There are mines of this mineral in Poland, Silefia, and in Bavaria and Sibe¬ ria ; at Cordova in Spain it conftitutes an entire moun¬ tain. Rock fait is alfo found in abundance in Che- fliire in England. It is found alfo in Africa, Alia, as well as in North and South America. Subfpecies 2. Fibrous Rock Salt. Fibrous Sal Gem, Kirw. ii. 32. Le Sel Gemme Fi- brcux, Broch. ii. 25. Soude Muriatee Fibreufe, Hauy, ii. 359. Fxter. Char.—This variety is found maflive, in fmall wedge lhaped veins ; luftre glimmering, rarely w’eakly fhining j fra&ure fibrous, curved parallel or divergent fragments wTedge-lhaped, with (harp edges. Colour grayiih white, yellowith or pearl gray, la¬ vender blue, violet blue, or flelh red; varies between tranllucent and femitranfparent. The other characters of fibrous rock fait correfpond with thofe of the pre¬ ceding fubfpecies, and it is found in fimilar fituations accompanying it. 2. Species. Sea Salt. This fait can perhaps fcarcely be confidered as a fe- parate fpecies. It is found on the (hores of the ocean, or of fait lakes during the dry feafons of the year, in confequence of the evaporation and diminution of the water which holds it in folution. Ffes—The various ufes of fait in domeftic economy and many of the arts are wTell known. Species 3. Native Sal Ammoniac. Sal Ammoniac, Kirw. ii. 33. Le Sel Ammoniac Na- tif, Eroch. ii. 27. Ammoniaque Muriatee, Hauy, ii. 380. Ejjeu. Char.—Entirely volatile by the application of heat. Exter. Char.—Moft commonly found in fuperficial layers, or efflorefcent; fometimes alfo maflive or llalac- tical, and rarely cryflallized. Primitive form of its cryftals a regular o£ahedron ; integrant molecule a re¬ gular tetrahedron. The cryftals are defcribed to be in the form of cubes, fix-iided pyramids, and dodecahedral *, luftre (tuning, often only glimmering or dull and vitre¬ ous. Erasure even ; fragments (harp-edged. Colour white, grayiih, or yellowifli; foft, and often friable j tafte fahne, pungent, and bitter. Chew. Char.—Very ftfluble in water, producing a con- fiderable degree of cold 5 rubbed with lime, gives out a pungent odour of ammonia. Conjlituent Parts. Klaproth. Muriate ammonia 77.5 Sulphate of ammonia 2.5 100.0 Localities, Szc.—This fait is 3 volcanic production, and found depolited in the cavities of lava, as on. Vcv fuvius and ./Etna, and in the Lipari iflands. It is alfo met with in Iceland, in Perfia, and different places of Alia. The fubftance analyzed by Klaproth was from Tartary. I his fait has alfo been difcovered in the neighbourhood of coal mines in Britain, which have been accidentally on fire. Sal ammoniac from Egypt may be confidered rather as an artificial produ&ion. IV. Genus. CARBONATES. 1. Species. Native Soda, or Carbonate of Soda. Natron, Kirw. ii. 6. L'Alkali Mineral, Broch, ii. 30. Soude Carbonaiee, Hauy, ii. 373. Effen. Char.—Soluble in water, and effervefees with nitiic acid. Exter. Char.—Found in final! particles, wdiich are ufually in the ftate of powder 5 is dull and meagre to the toueh. Colour grayifti white, or yellowifli gray j tafte (harp alkaline. Chem. Char.—Very fufible before the blow-pipe j the folution renders vegetable blues green. The following are the conftituent parts of Egyptian natron or foda, analyfed by Klaproth. Carbonate of foda 32.6 Sulphate of foda 20.8 Muriate of foda 13. Water 3 1 -6 100.0 Localities, &c.—Native foda is found on the furface of the foil, or on the borders of lakes which evaporate during the fummer, in Egypt, where it has been long colleCIed, and known under the name of natron. In the neighbourhood of Debreczin in Hungary, it is found efflorefcent on a heathy foil , in Bohemia, on a decora- pofed gnelfs rock, where it is annually collefted in con- fiderable quantity in the fpring of the year. Natron is alfo found near Naples, in Perfia, Bengal, and China. It exifts alio in folution in many mineral waters. Ufes.—This fait is very extenfively employed in many arts. Another variety of native foda has been deferibed. This is in the form of radiated maffes, which are com- pofed of afcicular cryftals. It feems to be a purer car¬ bonate of foda. The following are the conftituent parts according to the analyfis of Klaproth. Soda Carbonic acid Water Sulphate of foda 2. Species. Native Magnesia, or Carbonate of Magnefa. A pretty pure carbonate of magnefia, difcovered by Hr Mitchell; and another which contains an admixture D d 2 of 22.5 2-S 100.0 2 12 Salts. MINERALOGY of filica dlfcovered by Gtobert, has been already de- fcribed under the magnefian genus, fpecies I. which Part T. fee. V. Genus. BORATES, i. Species. Borax. Id. Kirw. ii. 37. Borax Nafif^ Broch. ii. 33. Soude Borattfe, Haiiy, ii. 366. EJJen. Char.—Tafte fweetifh ; fufible with confider- able intumefcence into a vitreous globule. Exter. Char.—This fait is found maflive and diffemi- nated, but moll; frequently cryftallized ; the forms are a fix-fided prifm with the two oppofite faces broader ; the fame prifm having its lateral edges truncated, or having its two narrow terminal edges truncated •, the crvftals are ufually imbedded in an earthy mafs ; fur- face a little rough, fometimes fmooth, and ufually co¬ vered with a white earthy cruft ; luftre ftrining, waxy ; fra&ure foliated. Colour grayilh white, yellowifh or greenifh; femi- tranfparent, or only tranftucent •, refraftion double j foftj brittle; greafy to the feel. Spec. grav. 1.740. Conjlituent Parts.—When borax is purified, it is a compound of foda and boracic acid ; but in its na¬ tive ftate it is always contaminated with earthy mat¬ ters. Localities, &c.— Borax is brought from Perfia and Thibet. According to fome travellers, it is got from the waters of a lake by evaporation in the open air ; but according to others it is ready formed on the borders of the lake, where common fait is alfo col- ledfted. Ufes.—Borax is ftill farther purified after it is brought to Europe, for the purpofes of employing it in the arts, particularly as a flux in metallurgical ope¬ rations. 2. Species. Boracite, or Borate of Magnejia. Boracite, Kirw. i. 172. Id, Brochant, i. 389. Exter. Char.—Always found cryftallized : 1. In cubes, having the edges and four of the angles truncated ; 2. The cube, having all the edges and angles trunca¬ ted. When thefe truncations are increafed on the edges, a dodecahedron is nearly formed, or when they increafe on the angles, the refulting form is an o&ahe- dron. Surface of the cryftals fmooth, fometimes rough ; luftre ftiining or refplendent ; internal luftre film¬ ing, refinous; fradlure conchoidal; fragments ftrarp- edged. Colour afli or yellowifh gray, grayifh or greenifh white ; femitranfparent or tranflucent, oftener opaque ; femihard ; rather eafily frangible. Spec. grav. 2 56. Client. Char.—Melts before the blow-pipe, froths up, and yields a yellowifh enamel, on which fmall rough points appear, and are thrown off like fparks by conti¬ nuing the heat. Conjlituent Parts, Magnefia Lime Silica Alumina Oxide of iron Boracic acid Lofs Weftrumb. J3-5 11. 2. 1. •7 68. 3*8 100.0 Eht/f Char.—Boracite has the property of becoming cledlric by heat, and exhibiting both kinds of ele&ri- city by oppofite points. Thefe eleclric poles are the extremities of the axes of the cube, each axis giving out at one extremity pofitive, and at the other negative eleiftricity. Localities, See.—This mineral has been only found at Lunebourg in Lower Saxony, in a mountain compo- fed almoft entirely of foliated gypfum, in which the de¬ tached cryftals are imbedded. VI. Genus. FLUATES. x. Species. Cryolite, or Eluate of Soda and Alumina, Id. Brochant, ii. 505. Alumine Fluatee Alkaline, Haiiy, ii. 398. Exter. Char Found maflive ; luftre ftiining, vitre¬ ous ; fradfure foliated ; fragments cubical. Colour grayifti white ; tranflucent ; immerfed in tva- ter, tranfparent; femihard ; ftreak fnow-white. Spec, grav. 2.94. Chem. Char.—Melts in.the flame of a candle, and from its eafy fufibility it derives its name. It then be¬ comes hard, and is changed into a flag, which is fome- what cauftic. Soluble with effervefcence in fulphuric acid, and gives out white vapours that corrode glafs. Confitucnt Parts. Klaproth. Soda 36. Alumina 23.5 Fluoric acid and water 40.5 Vauqnelin. 32 21 47 100.0 Localities, &c.—Cryolite was brought to Copenha¬ gen from Greenland, but nothing is known of its repo- fitory (B). THIRD CLASS. COMBUSTIBLES, I. Genus. SULPHUR. 1. Species. Native Sulphur. Id. Kirwan, ii. 69. Le Soufre Natf Brochant, ii. 37. This fpecies is divided into two fubfpecies ; 1, Com¬ mon ; 2. Volcanic native fulphur. Subfpecies (b) Boracite and cryolite do not certainly poffefs all the charadlers that entitle them to a place among the falts ; but as magnefia is the predominant bafe of the one and foda of the other, it tvas thought better to introduce them here than to multiply divifions. MINERALOGY. Part 1. ClafT-fica- tion. Subfpecies i. Common Native Sulphur. EJJ'en. Char.—The fulphurous odour when heated ; colour yellow. Exter. Char.—Sulphur is found maffive, diffeminated in fuperficial layers, or cryltallized. Primitive form of its cryftals is an odlahedron, whofe fides are fcalene tri¬ angles •, the integrant molecule is an irregular tetrahe¬ dron. The ufual forms of the cryftals are, I. That of the primitive form, in which two four-fided oblique- angled pyramids are joined bafe to bafe, of which the common bafe is a rhomb, whofe two diagonals are as 5 to 4 ; 2. The fame form having its fummits truncat¬ ed ; 3. The ftrft form having its fummit furmounted by an obtufe four-fided acumination, fet on the lateral faces •, 4. Or, having the common bafe truncated ; or, Having its obtufe lateral edges truncated 3 or, 6. Having the obtufe angles of the common bafe truncat¬ ed. The cryftals are of various fizes, moft frequently grouped ; furface fmooth 3 luftre refplendent 3 internal luftre ftiining, or weakly fhining, between refinous and adamantine 3 fradfture fine grained, uneven, fometimes conchoidal or fplintery 3 fragments (harp-edged. Colour yellow, greenifh, or grayilh yellow 3 tranflu- cent or femitranfparent 3 -tefraftion double 3 foft 3 brit¬ tle, and very eafily frangible 3 gives out by rubbing a fulphureous fmell. Spec. grav. 1.99 to 2.03. Chem. Char.—Burns with a peculiar blue fiame, and gives out a pungent odour, which is well known. Native fulphur is not always pure 3 it is often conta¬ minated with earthy matters. Ehijs. Sulphur becomes ele£fric by friction, and its eledlricity is negative. Localities, &c.—Native fulphur is moft commonly found in ftratiform mountains, chiefly in thofe of gyp- fum, marl, and compaft limeftone, and there it exifts in the form of nodules. Found alfo, but rarely, and ia fmall quantity, in the veins of primitive moun¬ tains. Sulphur is found in many countries of the world, as in Poland, Plungary, Switzerland, Spain, and Sicily, where the fineft cryftals yet known are found. Subfpecies 2. Native Volcanic Sulphur. Exter. Char.—Found maflive, in rounded pieces, fta- laftitical, cellular, or in thin fublimed layers, fometimes alfo eryftallized in confufed groups 3 internal luftre weakly (hining or ftiining j fraflure uneven } fragments blunt-edged. Colour the fame as the former, but inclining fome¬ times a little towards gray ; tranflucent 3 in other cha¬ racters it refembles the preceding. Localities, &c.— As its name Imports, this variety is found near volcanoes, where it is fublimed among the lava. The fulphur of iEtna and Vefuvius chiefly, and alfo that of Iceland, and of feme of the iftands in the Weft Indies, is collected, and forms a very important article in commerce. Ufes. Sulphur is one of the moft valuable fubftanceS in various arts. It is employed in the bleaching of woollen fluffs and filks 3 it forms an effential ingredient in gunpowder, and it is the bafe of fulphurous and ful- phuric acid, which are fo extenfively employed in tan¬ ning, hat-making, dyeing, .and other arts and mar.u- faClures. Combuf- tibles. II. BITUMINOUS Genus. ‘ 1. Species. Petroleum, or Mineral Oil. Le Naphle, and L ‘‘Haile Minerale Commune, Broch. ii. 59. and 60. Naphtha and Petrole, Kirwan, ii, 42.and 43. BitumeLiquide Brune, ou Noiratre, Hairy, iii. 312. Exter. Char.—Found fluid and fomewdiat vifeid. Colour biackiftv or reddiih brown 3 almoft opaque 3 feels very greafy 3 exhales a ftrong bituminous odour 3 tafte pungent, acid. Spec. grav. 0.708. to 0.854. Chem. Char.—Bums eafily with a denfe fmoke, and leaves fome earthy refidue. When expofed to the air it becomes thicker and lefs fluid. Its conftituent parts are carbone, hydrogen, and a fmall portion of oxygen. Localities, &c.—Petroleum is generally found in the vicinity of coal, rifing to the furface of the rvater which flows from coal ftrata. It is not uncommon in different parts of the world. It is found in Lancafliire in Eng¬ land, and at St Catharine’s well near Libberton, in the vicinity of Edinburgh. Naphtha, which is confidered merely as a purer kind of mineral oil, is found in confiderable abundance in different parts of Perfia, on the fhores of the Cafpian fea, in Calabria, Sicily, and America. Iru 1802, a fpring of naphtha of a topaz yellow colour, burning eafily, and leaving little refidue, w’ith a fpecific gravity of 0.83, was difeovered in the ftate of Parma in Italy, and afforded fuch a quantity as to be fufficient to illu¬ minate the ftreets of Genoa. Efes.-—Naphtha has been fometimes employed in the compofition of varniih, in that of fire-works, for the purpofe of heating rooms, when it is mixed with a fmall quantity of earth ; and in Perfia and other countries ft is burnt in lamps as a fubftitute for oil. Formerly it was employed in medicine as a vermifuge. 2. Species. Mineral Pitch. This is divided into three fubfpecies 3 1. elaftic 3 2. earthy 3 and 3. flaggy. Subfpecies 1. Elastic Mineral Pitch. Mineral Caoutchouc, Kirw. ii. 48. La Poix Minerale Elajlique, Broch. ii. 64. Bitume Elajlique, Haiiy, “i- 3l3- Exter. Char.—Found in mafies of different fizes, dif¬ feminated, fometimes fuperficial, or ftalaflitical; luftre dull, rarely glimmering 3 internal luftre fhining, refin¬ ous. Colour brownifti black, hair-browm, often veined yel¬ low 3 tranflucent at. the edges 3 foft confiftence like elaftic gum, and alfo elaftic. It gives out the fmell of leather. Spec. grav. 0.902 to 1.23. Localities, &c.—This mineral was difeovered in 1785 in the mine of Odin in Derbylhire in England, where it is accompanied with galena, calcareous fpar, heavy fpar, fluor fpar, and blende. This fubftance effaces the marks of black lead on paper, like elaftic gum 3 but ftains the paper. Subfpecies MINER Subfpecies 2. IEarthy Mineral Pitch. Setnicompacl Mineral Pitch, or Maltha, Kirw. ii. 46. La Poix Minerale 1'erretife, Eroch. ii. 65. Exter. Char.—Foand maflive ; internally dull 5 frac* ture earthy, fometimes uneven ; fragments blunt-edged. Colour blackifh brown, fometimes clove brown ; flreak lliining, and darker coloured 5 very foft; feels greafy ; fmell bituminous. Chem. Char.—Burns with much flame, and fmoke ; exhales a flrong odour, and leaves carbonaceous and earthy matter. T^oca/ities, &c.—Found in the principality of Neuf- chatel in Switzerland. Subfpecies 3. Slaggy Mineral Pitch. Compact Mineral Pitch, Kirw. ii. 46. I^a Poix Mineral? Scoriacee, Broch. ii. 66. Bitume Sohdc, Hauy, iii- 313. Slfphaluim, or Jews Pitch, of others. * Lin. Tranf. viii. ?5I- Exter. Char .—Pound maflive and difleminated, fu- pcrficial or ftalaftitical 5 luftre refplendent, refinousj fravSlure conchoidal •, fragments fliarp-edged. Colour perfect black, fometimes brownifli*black; opaque, rarely tranflucent at the edges j luftre remains in the ftreak j foft j feels greafy j by rubbing gives out a bituminous odour. Spec. grav. i.oy to 1.6. Localities, &c.— Phis variety frequently accom¬ panies the preceding. It is found at Morsfeld in the Palatinate, at Neufchatel in Switzerland. It is found floating on the furface of the lake Afpl^altum in Judea, from which it derives its name of jews pitch. It is there collefted by the inhabitants of the country as an objedfl of commerce, and at the fame time, it is faid to diminilh the quantity of noxious vapours which it ex¬ hale?—fo noxious that birds flying over it drop down dead, whence it has the name oiDeadfea. This va¬ riety of mineral pitch is found in other places, fome¬ times connected with coal and limeftone ftrata, and fometimes with mineral veins. But the ifland of Tri¬ nidad furnifhes the greateft quantity of this fubftance. In that ifland there is a pitch lake of about four miles in circumference } but it appears from the information of Mr Spon, in a letter to Mr Tobin of Briftol, by whom this information w’as communicated, along writh a number of fpecimens to Mr Hatchett, that the fub¬ ftance formerly fuppofed to be mineral pitch, is nothing more than a porous ftone impregnated with that fub¬ ftance •, fo that what was fuppofed to be an immenfe lake of mineral pitch or afphaltum, is only the ftone of the country impregnated with bitumen. Mr Hatchett thinks this ftone may be arranged in the argillaceous genus *. 3. Species. Amber. Id. Kirwx ii. 65. Le Succin, Broch. ii. 69. Id. Hauy, ii.327. This is divided into two fubfpecies. Subfpecies 1. White Ameer. Exter. Char.—Pound maflive, and in rounded pieces; luftre ftiining or weakly ftiining; fraflure conchoid*! 5 fragments Iharp-edged. A E O G Y. Colour yellowiih white, or flraw-yellow; flightly tranflucent 5 loft ; eafily frangible ; by fri&ion, or re¬ ducing to powder, it gives out an agreeable odour. Spec. grav. 1.07 to 1.08. Chem. Char.—Burns with a yellow' flame, without melting, giving out at the fame time a peculiar odour j leaves very little refldue. Subfpecies 2. Yellow Amber. Exter. Char.—Alfo found in rounded pieces of vari¬ ous fizes 5 Surface rough and uneven 5 dull, fometimes glimmering 5 internal luftre refplendent, reftnous; fome¬ times tranfparent. In its other external and chemical cbara&ers, it refembles the preceding. _ Lhyf. Char.—Amber becomes ftrongly eledfric by fridfion, a property known to the ancients. From the Greek and Latin word elecirum, the term eledlricity is derived. ConJUtuent Parts Amber is compofed of a large proportion of oil, and of a peculiar acid, the fuccinic, which is obtained by diftillation. _ Localities, &tc.— Amber is found in the vicinity of bituminous wood, but moft commonly in the fand on the flrores of the ocean, and chiefly on the ihores of the Baltic. It is found alio in Sw’eden, France, Italy, and on the eaft coaft of England. Amber frequently con¬ tains fmall parts of vegetables, and entire infedls. Of the origin of this fubftance nothing certain is yet known. IJes.—The ufes of amber for ornamental purpofes, are well known. In this country it w’as formerly in higher eftimation than at prefent. It ftill forms an im¬ portant article of commerce in eallern countries. 4. Species. Mellite, or Honey Stone. Id. Hauy, ii!. 335. La Pierre de Miel, Broch. ii. 73. Mellilite, Kirw. ii. 68. Exter. Char*—Found ufually cryftallized, in double four ftded pyramids ; the furface fmooth and Ihining j internal luftre refplendent, betw'een refinous and vitre¬ ous ; fradlure conchoidal; fragments rather Iharp- edged. Colour honey yellow, fometimes hyacinth red ; tranf¬ parent or tranflucent refradion double j foft j brittle. Spec. grav. 1.58 to 1.66. Chem. Char.—Becomes white before the blow-pipe, and is reduced to allies, without flame. Gonjlituent Parts. Klaproth. Alumina, 16 Mellitic acid, 46 Water, 38 > 100 Phyf. Char.—Becomes flightly eledric by fridion. Localities, &c.—This mineral is hitherto rare. It has been found only in Switzerland, accompanied with mineral pitch, and at Artern in Thuringia, attach¬ ed to bituminous w7cod. 5. Species. Brown Coal. This is divided into five fubfpecies 5 1. common % 2. bituminous wood} 3. earth coal} 4. alum earth} 5. moor coal. Part I. CUUlfica- tion. 3 Subfpecies Part I. MINERALOGY. * Phil. TranJ. 1804. P- 39P- Subfpecies 1. Common Brown Coal. La Houille Brune, Broch. ii. 47. Exter. Char.— Found maffive ; luftre {Fining, r«- finous 3 fracture conchoidai 3 longitudinal fradure flaty 3 fragr.ients rather fliarp edged. Colour browniili blank, or blackifli brown 3 ftreak fliining 3 fofi 3 not very brittle. Chem. Char.—Burns with a blue-coloured flame, and gives out an odour like that of bituminous wood. Conjlituent Parts. Hatchett *. Water which foon came over acid, and afterwards turbid by the mixture of bitumen, Thick brown, oily bitumen, Charcoal, Hydrogen, carbonated hydrogen, and carbonic acid gafes, Grains. 60 21 90 29 200 The above is the analyfis of 200 grains of Bovey coal by diftillation. Localities, &c.— This variety is not uncommon in many places of Germany. It is found alfo at Bovey near Exeter in England, from which it is called Bovey coal. Subfpecies 2. Bituminous Wood. Carbonated Wood, Kirw. ii. 60. Lc Bois Bitumineux, Broch. ii. 44. Exter. Char.—Has a ligneous form, and even fome- times the appearance of branches and roots of trees 3 glimmering in the principal fra&ure, in the crofs frac¬ ture, conchoidai 3 fragments fplintery, wedge-fhaped, or tabular. Colour commonly light blackifh brown, fometimes wood brown 3 opaque 3 Break (hining 3 foft, and eafily frangible. Chem. Char.—Burns with a bright flame, and gives out a fweetifh, bituminous fmell. Localities, &c.—This variety is found in the fame places with the other varieties of coal, and alfo in places where the more common kinds of coal are rare, or in fmall quantity, as in the ifland of Iceland, where it is known by the name of futurbrand; and in the ifland of Skye in Scotland. It is found alfo in the coal fields round Edinburgh, and alfo at Bovey near Exeter, and in various places on the continent. Subfpecies 3. Earthy Coal. Bois Bilumineux Terreux, Brochant, ii. 45. Exter. Char.-—The confiffence of this variety is in¬ termediate between folid and friable 3 dull, rarely glimmering ; fracture earthy. Colour blackilh brown, or liver browm 5 ftreak fhln- ing 3 Bains 3 very foft. Localities, &c.—This is found in Saxony, Bohemia, France, and particularly in the vicinity of Cologne, where it is known by the name of umber or Cologne earth, which is employed in the fabrication of colours 3 21 ; and from certain varieties which contain pyrites, alum Combuf- is extracted. tibles. Subfpecies 4. Alum Earth. This has been already defcribed under the name of ahtmiaous fchijlus, in the argillaceous genus. Subfpecies 5. Moor Coal. La Houille Limoneufe, Brochant, ii. 48. Exter. Char.—This variety is found maflive, and i» extenfive beds 3 internally glimmering 3 crofs fracture even, fometimes flat conchoidai 3 longitudinal frabture flaty ; fragments trapezoidal or rhomboidal. Colour blackifli brown, and brownifli black 3 Break fliining 3 foft, very eafily frangible. Localities, &c.—Moor coal is abundant in Bohe¬ mia ; it is found alfo in Tranfylvania, and chiefly- among fandflone, limeflone, and trap rocks. It feems - to approach nearly to earth coal. 6. Species. Black Coal. This fpecies is divided into fix fubfpecies 3 pitch, - columnar, flaty, cannel, foliated, and coarfe coal. Subfpecies 1. Pitch Coal. La Houille Picifcrme, Brochant, ii. 49. Exter. Char.—Found maflive or difleminated 3 and fometimes parts of vegetables, fuch as the branches of trees, are obferved. Luflre fhining, refplendent, refi- nous 3 frablure oenchoidal 3 fragments lharp-edged. Colour perfebf black, and the longitudinal frabture fometimes brownifli 5 foft 3 eafily frangible. Specific gravity 1.3. Localities, &c.—This is one of the mofl common varieties of coal, and therefore is found in all coal countries. llfes.—As it is fufceptible of a fine polifh, it is em¬ ployed for various ornamental purpofes. The fub- Bance known by the name of jet, belongs to this va¬ riety. Subfpecies 2. Columnar Coal. La Houille Scapiforme, Brochant, ii. 15. Exter. Char—Found maflive 3 ing, or weakly fhining, refinous in its frablure fliin- ... „ ; frablure more or lefs perfectly conchoidai 3 fragments indeterminate. Colour perfeft black, or brownifli black. It is com- pofed of diflinbl concretions, which are columnar, pa¬ rallel, {lightly curved, wvhofe furfaces are fmooth and fliining 3 is foft, and eafily frangible. Localities, &c.—This is a very rare variety of coal. It is found in the Meifner, near Almerode, in Htflia, in a bafaltic mountain. Subfpecies 3. Slaty Coal. La Houille Schifleufe, Brochant, ii. 32. Exter. Char.—Found maflive in entire beds; luflre fliining, fometimes only weakly fhining or glimmering, refinous 3 principal frablure flaty 3 crofs fraflure imper- feff conchoidai 3 fragments in the form of tables 3 not very lharp-edged. Colour - MINER Colour perfedl^black, often alfo grayifh, rarely brown- Ifli black *, ftreak (Inning-, foft, or femi-hard; eafily fran¬ gible. Specific gravity 1.25 to 1.37. Localities^ &c.—This is the prevailing coal in Bri¬ tain, as at NewcafUe and Whitehaven in England, and in the coal country both in the eaft and weft of Scot¬ land. Subfpecies 4. Cannel Coal. La Houi/le de Kilkenny, Brochant, ii. 55. Id. Kirwan, ii. 52. A L O G Y. Exter. Char.—Found maftive, rarely dilTeminated j luftre ftiining or refplendent, approaching to metallic ; fratfture perfe£Uy conchoidal j fragments not very (harp edged. Colour iron black, inclining to brown, or exhibiting the fuperficial colours like tempered fteel j foft; eafily frangible. Chem. Char.—Burns without any flame, leaving a white a(h. Localities, &c.——This variety of coal is very rare. It is found at Newcaftle, and at Meiffner in Heflia, along with the other varieties of coal. Part I. Claffi'fica- tion. Exter. Char.—Found mafiive ; luftre weakly (liining, refinous ; frafture commonly conchoidal, fometimes even and foliated j fragments fometimes rhomboidal or cubical. Colour grayidr black ; ftreak (liining j foft j eafily frangible. Spec. grav. 1.23 to 1.27. Localities, &c.—This coal accompanies the former in many places of England and Scotland, as at White¬ haven and Wigan in Lancalhire in England ; in the neighbourhood of Edinburgh j and at Muirkirk, and other places in Ayrfhire in Scotland. The coal at Kilkenny in Ireland belongs alfo to this variety ; and from the places where it is found, is called Wigan or Kilkenny coal. Ufes.—Befide being employed as fuel with other kinds of coal, this variety, being fufceptible of a fine polifti, is cut and formed into various ufeful and orna¬ mental purpofes. It is faid that the choir of the ca¬ thedral church of Litchfield is covered with plates of this coal alternating with black marble. Subfpecies 5. Foliated Coal. I^e Charbon I^amclieux, Brochant, ii. 54. Subfpecies 2. Slaty Coal Blende. Native Mineral Carbone, Kirw. ii. 49. La Blende Charbonneufe, Brochant, ii. 57. Anthracite, Haiiy, n. 307. Exter. Char.—Found maffive, and difleminated j in¬ ternal luftre (hining, or refplendent, and between me¬ tallic and vitreous ; fraflure more or lefs perfe&ly fla- ty •, crofs fraflure flat conchoidal} fragments fometimes cubic, and fometimes in tables. Colour perfed black, approaching more or lefs to iron black, or grayilh or bluith black ; opaque j (tains, but does not write ; foft ; rather brittle ; very eafily frangible. Spec. grav. 1.3 to 1.8. Chem. Char.—Reduced to powder, and heated in a crucible, this coal gives neither a fulphureous nor bitu¬ minous fmell, and neither fulphur nor bitumen can be obtained from it. After being long expofed to heat, it confumes (lowly without flame, and lofes during the procefs about two-thirds of its weight. The refidue is of a blackifh gray colour, which (hows that the com- buftion has not been complete. Exter. Char.—Found maflive ; principal fra&ure re¬ fplendent ; crofs frafture (hining ; principal ffadlure more or lefs foliated ; crofs fraflure fomewhat uneven j fragments rhomboidal. Colour perfeift black, and on the (ides of the fif- fures fuperficial colours appear, like the colours of tempered fteel, or thofe of the peacock’s tail; eafily frangible. Localities, &c.—This coal is found at Liege, in Saxony, near Drefden, and in fome parts of France. Subfpecies. 6. Coarse Coal. La Houille GroJJiere, Brochant, ii. 33. Exter. Char.—Found maffive ; is weakly (hining, -refinous ; frafture uneven, or more or lefs flaty 5 frag¬ ments blunt edged. Colour grayilh black, fometimes browniih black ; Itreak (hining j foft; eafily frangible. Localities, &c—Accompanies the other kinds of coal, whofe localities have been already mentioned. 7. Species. Coal Blende. This is divided into two fubfpecies, conchoidal and flaty. Subfpecies t. Conchoidal Coal Blende. ' La Grille Edatante, Brochant, ii. 50. Gianx-hohile of t: Termans. 2 ConJHtuent Parts. Pure carbone Silica Alumina Oxide of iron Lofs Panzenberg. 90 2 5 3 Dolomien. 72.05 I3-I9 3-29 347 8. 100.00 Localities, &c.—This variety has been found in a vein at Schemnitz in Hungary, in Pais de Vaud, in a tranfported rock, which feems to be intermediate be¬ tween granite and breccia j at Konigfberg in Norway, where it is accompanied with native filver ; in Saxony i? forms an entire bed in a mountain of clay flate 5 alfo found in the ifland of Arran in Scotland. III. GRAPHITE Genus. 1. Species. Graphite, or Black Lead. Plumbago, Kirw. ii. 58. Ze Graphite, Broch. ii. 76. Fer Carbure, Hauy, iv. 98. Ibis fpecies is divided into two fubfpecies, fcaly and compadL Subfpecies 1. Scaly Graphite. Exter. Char.— Found maflive and diffeminated j luftre glimmering or (hining, metallic 5 fratfure foliated, con¬ choidal, Part T. MINERALOG Y. Claffifica- choidal, fometitries uneven or ilaty ; fragments blunt- ition. edged, fometimes trapezoidal 5 commonly appears in v diilindl granular concretions, which are fmall or fine grained, with a fplintery afpefl. Colour intermediate between bluifh black and light iron black j fometimes fleel gray, or brovvniih black j opaque ; ftreak fhining j flains and writes} foft j eafily frangible 5 feels greafy. FOURTH CLASS. METALLIC ORES. I. PLATINA Genus. Species. Native Platina. Id. Kinv. ii. 103. Le Platine Natf Broch. ii. 86. P/atine Natif Ferrifeve, Hauy, Hi. 368. Subfpecies 2. Compact Graphite. Chem. Char.—This fubfpecies approaches fo near to the former in its characters, that it feems diffi¬ cult to diltinguilh it. The following characters and circumftances connected with the natural hi ft or y of graphite, refer to both. Specific gravity 1.987 to 2.456. Chem. Char.—When expofed to heat in a furnace, it gives out, during combuftion, a great proportion of carbonic acid, leaving a refiduum of red oxide of iron. # Jour, des Carbone Mines, N° Iron tU-P-lS- Silica ^ Alumina Conjlituent Parts. Berthollet. 9°‘9 9.1 100.0 100 100 Of the above analyfis it muft be obferved, that the twm fiift by Berthollet and Scheele muft have been very pure fpecimens of graphite j and, on the contrary, the fpecimens analyzed by Vauquelin muft have been very impure, containing fo large a proportion of earthy matters, and fo fmall a proportion of the proper ingre¬ dients of that mineral. Localities, &c.—This mineral, which is not very common, is found chiefly in primitive mountains. It is met with in Spain, France, Bavaria, and Hungary. In England at Borrowdale near Kefwick in Cum¬ berland $ and at Craigman, near New Cumnock, in Ayrffiire in Scotland, where it is found in detached mafles among rocks nearly fimilar to thofe which ac¬ company coal. Vfes.—Graphite or black lead is employed for ma¬ king pencils. The coarfer parts are employed in ma¬ king crucibles. It is alfo employed for covering caft iron, fuch as grates, to defend them from ruft; and on account of its undluous property, it is applied to thofe parts of machines which are fubje& to fri&ion, for the purpofe of diminiflnng it. 2. Species. Mineral Charcoal. This fubftance, which accompanies the other varie¬ ties of coal already defcribed, is of a woody texture, and has therefore a fibrous fracture, with fomewhat of a {hining and filky luftre. It is ufually found in thin layers with the other varieties of coal, and perhaps it might be confidered as coal lefs perfeflly formed *, but in its characters it agrees fo much with the va¬ rieties of coal blende, that it feeras quite unneceflary to make it a feparate fpecies. VOL. XIV. Part L Ejfen. Char.—Of a filver white colour, and'infufible. Exter. Platina is found in the form of fmall flat or rounded grains; furface fmooth, with {hining me¬ tallic luftre $ ftreak refplendent. Colour light fteel gray, or filver white ; femi-hard j dudlile j flexible in thin plates. Spec. grav. 15.601 to 17.75 but when purified, and hammered, 23, and ac¬ cording to fome, 24. Chem. Char.—Is almoft infufible without addition, in the focus of a burning glafs, or expofed to the adtion of oxygen gas. It does not amalgamate with mercury, and is only foluble in nitro-muriatic acid. Localities, &c.—Platina was firft brought to Europe by Don Ulloa in 1748. The repofitory of this metal is not known, and it has been found only in South Ame¬ rica, till lately that it was difcovered in gray filver ore from the mine of Guadalcanal in Spain. In the ana¬ lyfis of this ore, Vauquelin found the platina to be in the proportion of V/'es.—Platina is one of the moft valuable mineral fubftances, as, on account of its hardnefs and infufibi- lity, it may be applied to many of the purpoles of gold and iron; and from its properties of being lefs li¬ able to change when expofed to the air, or to the ac¬ tion of other chemical agents, it anfwers thofe purpofes in a fuperior degree. Platina in its crude ftate is alloyed with other me¬ tallic iubftances. It has been long known that it is accompanied with particles of iron, gold, and fome other fubftances. It contains alfo an ore of one of the new metals. This is iridium, which is alloyed with ofmium, another new metal,-both which were difcover¬ ed by Mr Tennant. This ore is compofed of plates j it is not malleable 5 its fpecific gravity is 19-5, and it is not a6fed on by nitro-muriatic acid, which difl'olves pla¬ tina. Rhodium and palladium, two other new metals, are alloyed with platina. II. GOLD Genus. Species. Native Gold. This fpecies is divided into three fubfpecies; 1. gol¬ den yellow ; 2. brafs yellow ; and, 3. grayiffi yellow. Subfpecies 1. Golden-yellow Gold. L’Or Natif, Jaune d'Or, Broch. ii, 89. Native Gold, Kirw. i. 93. Exter. Char.—Gold is found moft frequently diffe- minated, fuperficial, or in grains reticulated, dendri- tical, capillary, or cellular, often in fmall plates, more rarely cryftallized. The forms of its cryftals which have been obferved, are fmall perfeft cubes, regular oftahedrons, dodecahedrons, double eight-fided pyra¬ mids, terminated by four-fided fummits, placed on the E e four 2i8 • MINER Metallic four lateral edges of the pyramids alternately ; but , 0res‘ the cryftals ate fmall and ill defined * the furface is fmooth and refplendent; that of the fmall plates drufy and (hining; that of the grains only ftrongly glimmer¬ ing 5 internal luftre weakly Alining, metallic ; fradlure hackly. This variety prefents the perfeft colour of gold. It is foft; perPeclly dudlile, flexible, but not elaftic ; ftreak refplendent. Spec. grav. of pure gold 19.2 ^ to J9.64. Subfpecies 2. Brass-yellow Gold. L'Or d^un jaune de laiton, Broch. ii. 91. Exler. Char.—This variety is almoft always found difleminated in fmall particles, or fuperficial; fome- times alfo capillary, in fmali plates, or cryftallized in thin fix-fided tables. The colour is that of brafs of various (hades, ac¬ cording to the proportion of alloy. In other charafters it refembles the former, excepting in the fpecific gravi¬ ty, which is inferior, owing to the greater proportion of other metals with which it is alloyed. Subfpecies 3. Grayish-yellow Gold. L'Or Nat if d'un jaune gr ifatre^ Broch. ii. 92. Exter. Char.—This variety is alfo found dilTeminated in fnall flattened grains •, furface is not very fmooth j almofl uneven, and weakly ihining. Colour fteel gray, approaching to that of brafs: fpec. grav. of this variety is greater than the laft, but inferior to the firft. In other external characters they are the fame. Chem. Char.—Native gold is only foluble in nitro- muriatic acid 5 platina is alfo foluble in the fame acid, but it is not like gold, precipitated from its folution by fulphate of iron. Conjlituent Parts.—Native gold is not always found pure. It is frequently alloyed with filver or copper, or with both, and fometimes alio, it is faid, with platina. To thefe alloys the difference of colour, which is the foundation of the divifion into three varieties, is owing. The firft variety is the pureft, containing only a fmall proportion of filver or copper; the fecond has a greater proportion of thefe metals *, and the third, it is fuppofed, is alloyed with a fmall portion of platina. Ufes.—Gold (on account of its indeftruftible nature, and its remarkable malleability and diuffility), is one of the moft important and valuable of the metals for many purpofes ; but its ufes, whether as money, or ar¬ ticles of luxury, are too well known to require enu¬ meration. As pure gold has no great degree of hard- nefs, it is neceffary to alloy it with a portion of copper. This is not lefs than and never more than -J. Loca/ttiesy &c.—Gold is chiefly found in primitive mountains, and there it is ufually in veins, fometimes diffemmated in the rock itfelf. Tne accompanying fubltances are quartz, feldfpar, limeftone, heavy (par, pyrites, red filyer, vitreous^ filver, and galena. Gold js alfo mixed with manganefe, gray cobalt, nickel, and malachite. Gold has alio been found, it is faid, in foffil iubftances, as in petrified wood, penetrated with filiceous earth, a mafs of which was dug out at the depth of 50 fathoms, in an argillaceous breccia, or, as A LOGY. partI. is fuppofed by fome, a porphyry with an argillaceous Claffifica- bafis, in Tranfylvania. This is confidered as a proof of tion- the more recent formation of gold, as well as the difco- y~ ' ' very of Patrin, who found native gold furrounded by muriate of filver, in the mine of Zmeof in Siberia. Muriate of filver is fuppofed to be comparatively a late produftion. But. gold is perhaps more common to alluvial foil j there it is diffeminated in grains, along with filiceous, argillaceous, and ferruginous fand, of which certain foils are compofed j and alfo in the fand of many rivers: and it is obferved that the gold is moft; abundant when the waters are at the loweft, and efpecially foon after floods, which (hews that the gold is carried down along with the earthy matters which are fvvept away by the violence of the current. It has been fuppofed too, that the gold found in the bed of rivers, has been detached, by the force of the waters, from the veins and primitive rocks traverfed by thefe currents ; and according to this opinion, attempts have been made to trace the fource of thefe auriferous fands, in the hope of difcovering the native repofitory of this precious metal ; but thefe at¬ tempts have ufually failed, for it has been found that the gold is peculiar to the alluvial foil through which the.ftream is carried, and in which the gold is collefted. This point feems to be eftabliflied by the obfervations of naturalifts. 1. The foil of thofe plains freqnently contains, to a certain depth, and in particular places, particles of gold, which may be feparated by waihing. 2. 1 he bed of the rivers and auriferous dreams yields a greater proportion of gold, after the plains which are traverfed by thofe rivers have been flooded, than in any other circumftances. 3. It has always been obfer- yed., that gold is found in the fand of rivers in a very limited fpace. By examining the fand of thefe rivers higher up, and nearer to their fource, no gold is found j fo that if this metal were derived from the rocks, w’hich are fwept by the currents, the quantity would be great- eft neareft to their fources j but obfervation has proved the contrary. Ihus the river Oreo contains no gold, but from Pont to the place where it joins the Po. The Tefin affords no gold till it has traverfed lake Major, where its courfe mull have been retarded, and where all the heavy particles of matter which it carried along with it from the primitive mountains, mull have been depoftted. The quantity of the gold collefted on the Rhine near Stralbnrg, is greater, than what is found near Bade, which is more in the vicinity of the moun¬ tains. No gold has been difeovered in the fands of the Danube during the firft part of its courfe. Thofe fands become only auriferous below Efferding. The fame remark may be applied to the Ems. The fands of the upper part of this river, which traverfes the mountains of Stiria, contain no gold j but from the place where it enters the plain at Steyer, till it joins the Danube, its fands are auriferous, and iufficiently rich to be waffl¬ ed with advantage. 1 he moft of the auriferous fands in all parts of the world, are of a black or reddifh colour, and confequently ferruginous. From this circumftance, conne&ed with the gold of alluvial land, fome naturalifts have inferred, that it is owing to the deconipofition of auriferous pyrites. It 'WTas obferved by Reaumur, that the fand which accompanies gold in moft of the rivers, and par¬ ticularly in the Rhone and the Rhine, is like that of Ceylon Part T. MINERALOGY. 23 C.oM mines of Spain. „29 Of France. 3° Of Pied¬ mont. 31 Hungary. Ceylon and Expailly, compofed of Iron and fmall grain of rubies, corundum, hyacinth. Titaniumjalfo has been difcovered. It has been obferved befides, that the gold of alluvial foil is purer than that which is immediately obtained from rocks, from which it Is fuppofed that it has a different origin. It does not appear to be certainly afcertained, that gold is found in volcanic foil. Such are the general fafts relative to the repofitories of gold. We (hall now biiefly mention the more re¬ markable places where gold has been found and collect¬ ed, beginning with thofe of Europe. Spain formerly had mines of gold 5 the richeft wTas in the province of Afturias, where it w’as dug out from regular veins. Thefe mines, according to ancient hido- rians, where wrought by the Phoenicians, and afterwards by the Romans ; but they have been totally abandoned fince the difcovery of America, and the mineral riches of that country. The rivers of Spain, as wTell as the Tagus in Portugal, contain auriferous fand. The only mine of gold which in modern times has been wrought in France, was difcovered in 1781, at Gardette, in the valley of Oyfans, department of Ifere. This was a regular vein of quartz, traverfing a moun¬ tain of gneifs, and containing auriferous fulphuret of iron, and feme fine fpecimens of native gold-, but it was not fudiciently rich to defray the expence of the opera¬ tions. Many of the rivers of that country contain au¬ riferous fand, as the Rhone, the Rhine, the Garonne, and others of fmaller note \ and it is faid that gold is alio found among the black fand, and particles of mo- vail'y iron ore, in the neighbourhood of Paris. In Piedmont there are fome mines of gold. At the foot of Mount Rofa, veins of auriferous fulphuret of iron have been difcovered, traverfing gneifs 5 and al¬ though thefe pyrites do not yield more than 10 or 11 grains of gold in the quintal, it has been found worth while to continue the operations. On the fouth fide of the Apennine mountains, there are feveral auriferous rivers and foils. Some of the rivers of Switzerland alfo contain auri¬ ferous fands. Such are thofe of the Reufs and the Aar. In Germany the only gold mine which is wrought is in Saltfburg, in the chain of mountains which traverfes that country from eaft to weft, and which feparates it from the Tyrol and Carinthia. But Schemnitz and Cremnitz are the moft remark¬ able places in Europe for mines of gold and auriferous fands. The gold of Schemnitz is accompanied by fil- ver, lead, and iron pyrites, and the matrix is quartz. Auriferous fand is found not only in the bed of the river Neva, but this fand is ftill richer in the plain through which the river flows. According to De Born, this is a ferruginous land, lying below a bed of chalk. In Tranfylvania the celebrated gold mine of Nagyag is remarkable for having the gold combined with na¬ tive tellurium. There is alfo another mine at Felfo- banya, the ore of which is an auriferous fulphuret of filver, in a vein of a kind of jafper. The rivers of this country alfo contain gold. The plain on the banks of the river Moros contains an auriferous fand, which is depofited between two beds, neither of which yields a particle of gold. The upper ftratum is vegetable foil, and the lower is compofed of fchiftus. The mines of Hungary are the only gold mines in Europe which are of any importance. In Sweden gold is obtained from the mine of Edel- fors in the province of Smoland. This mine yields na- Sweden, live gold, and auriferous iron pyrites. The veins are compofed of brown quartz, traverfing a mountain of fchiftofe hornftone. The gold is fometimes difleminated in the rock itfelf. 33 In Greece, the ifiand of Thafos in the Archipelago Greece, was celebrated in antiquity for its rich mines of gold. The ancients alfo, it is faid, found abundance of gold in Thrace and Macedonia. The alluvial foil in feveral places of the BritiftiIreland, illands, has alfo furnilhed gold. Not many years ago, a confiderable quantity of gold was colle&ed in a Tandy foil, on the mountains of Wicklow in Ireland. Several maffes of native gold, exceeding an ounce in weight, were found in that foil ; one weighing 22 ounces was found, which is faid to be the largeft fpecimen of na¬ tive gold found in Europe. 35 It would appear that gold was collected at a very Scotland early period, in Scotland, and particularly in the mine field of Lendhills ; but the moft extenuve operations w-eve carried on by Bulmer, an Engliftiman, in the time of Queen Elizabeth. The trenches, heaps of foil that had been turned up, and other marks of thefe ope¬ rations, yet vifible between Leadhills and Elvanfoot, ftill retain the name of Buhner's IVorkings, and the place where the gold was waftied, is ftill called-the ^0/^fcour. At that time, it is faid, an immenfe quantity of gold was colledied. Not many years ago, fimilar operations were relumed, by the advice of a German -, but fo far as we underftand, the quantity of gold colledted was fcarcely equal to the expence. The operations during the laft attempt were carried on under the fuperin- tendance of the late Mr John Taylor, manager of the mines at Wanlockhead ; a man of no common fagacity, by which he was enabled to colleft many curious fadts with regard to the natural hiftory of gold. The gold was found in that country immediately under the vege¬ table foil and the method of conducing the operation w-as, to diredl a fmall ftream of water fo as to carry this * foil along with it, to bafons or hollow places, where the water might depofit the matters which had been carried along by its current. The matter depolited was repeatedly walhed, till the whole of the earthy fubftances were carried off. The gold being heavieft, funk to the bottom, and remained behind. Among other fafts which Mr Taylor communicated to us, and which he obferved during the progrefs of thefe opera¬ tions he found, that the gold was always moft abundant near the top of the lead veins which traverfe that coun¬ try. He was fo fatisfied of this faff, that he could tell, merely by the quantity of gold increafing, when they approached to a vein ; and on the other hand the quan¬ tity diminilhing as they receded from the vein. This faff fliews that there is fome conneffion betw-een me¬ tallic veins and the formation or depofition of gold. Gold is ftill found in the foil of that country ; but whether the quantity be lefs than formerly, or the ex¬ pence of collefting it, from the difference in tfie price of labour, greater, the produce is by no means equal to the expences, and therefore fearching for gold is now only the employment of the leifure hours of fome of the miners. E e 2 The 2 20 Metallic Oies. MINERALOGY. Afia. 36 37 Africa. 3? America. T he whole extent of the continent of Afia furnifhes gold, in greater or fmaller quantity. Gold is found in leveral ot the mines of Siberia, and particularly in that of Bereloi, which yields auriferous pyrites partially de- compofed, and diiTeminated in a vein of quartz. In the fouthern parts of Afia, many mines, and particu¬ larly the fands of the rivers, contain gold. The Pac- tolus, a fmall river of Lydia, was celebrated in anti- .quity for the quantity of gold which it yielded, and it was fuppofed to be the fource of the riches of Croefus. Japan, Formofa, Ceylon, Java, Sumatra, Borneo, the Philippines, and other iflands of the Indian Archi¬ pelago, are fuppofed to be rich in gold at this day. The greateft quantity of gold which the ancients pofielfed, befide what was obtained from Spain, was brought from Africa. The gold of Africa, which ftill forms an important article of commerce, is always in the ftate of gold duft ; a circumftance which {hews that it is chiefly extratted from alluvial foil by wafhing. Lit¬ tle gold is found in the northern parts of Africa ; three or four places are remarkable for the quantity of gold which they yield. The firft is that part of the country between Darfour and Abyfiinia. The gold colle£ted there is brought by the Negroes for fale in quills of the oflrich and of the vulture. It would appear that this country was known to the ancients, who regarded Ethiopia as a country rich in gold j and Herodotus mentions that the king of that country exhibited to the ambaifadors of Cambyfes, all the prifoners bound with chains of gold. The fecond great fource of gold duft in Africa is to the fouth of the great defert Zara, in the weftem part of that country. The gold is colle&ed in that exten- five flat which ftretches along the foot of the lofty mountains, among which the rivers Senegal, Gambia, and Niger, have their origin. Gold is found in the fands of all thefe rivers. Bambouk, which lies to the north-weft of thele mountains, fupplies the greateft part of the gold which is fold on the weftern coaft of Africa; at Morocco, Fez, and Algiers, as well as that which is brought to Cairo and Alexandria in Egypt. _ third region of Africa where gold is abundant, is on the fouth-eaft coaft, oppofite to IVIadagafcar; and it is faid that the gold brought from Opbir, in the time of Solomon, was from that part of Africa. America is the richeft country of the world, in mo¬ dern times, in this precious metal. Ihere it is colleifl- ed in the alluvial foil, and in the beds of rivers, and fometimes, but more rarely, in veins. In Mexico gold is chiefly found in the numerous filver veins of that country. All the rivers in the province of the Carac- cas, about io° north of the equator, furnifti gold. In the Spanifh part of America, Chili furnilhes gold from the alluvial foil, as well as the province of Choco, where it is more abundant ; while that of Peru is ob¬ tained from veins of quartz, marked with ferruginous But tae greateft quantity of gold of commerce comes trom. Brazil, where it is colle&ed in the alluvial foil and in the fand of rivers, and extrafted by wafhing! Gold is found almofl everywhere in that country, at tile foot of the immenfe chain ot mountains which is nearly parallel with the coaft, and which ftretekes from die 50 to the 30* of S. Lat, Part I. III. Genus. MERCURY. 1. Species. Native Mercury. Mercury, Kirw. ii. 223. Mercure Nat if, Broch. ii. 241, Id. Hauy, iii. 423. Ffen. Char.—Remains liquid till the temperature be reduced to 40* below o Fahrenheit. Exter. Char.—Native mercury exifts diffeminated, in. globules of different fizes, in fmall cavities of other ores of mercury ; luftre refplendent, metallic. Colour ftiining white, or tin white ; opaque ; perfect¬ ly fluid ; does not w-et the finger : feels very cold So gr. 13.568 to 13.581. ' P . Fhem. C/k?/-.——Volatile before the blow-pipe, without diffufing any perceptible odour. Native mercury is underftood to be pure, and having all the properties of that metal; but it is fometimes amalgamated with a little filver, which deftroys its flui¬ dity in a flight degree, and renders it fomewhat vif- cous. Localities, &c—Native mercury is ufually found along with the other ores of that metal, as at Idria, in Friouli, and at Almaden in Spain; but the great pro¬ portion of the mercury of commerce is obtained by dif- tillation from native^cinnabar. There is alfo, it is faid, a rich mine of native mercury near Guanca Velica in Peru. . Ufes—For many purpofes mercury is one of the moft important of metallic fubftances. It is extenfively em¬ ployed in metallurgy, in extrafting gold and filver rom their ores, by the procefs to be afterwards deferib- ed, called amalgamation. I he ufes of mercury in gild- ing, in filvering the backs of mirrors, and in medicine, are well known. 2. Species. Native Amalgam. Natural Amalgam, Kirw. ii. 223. DAmalgam Nat f Broch. ii. 99. Mercure Argental, Hauy, iii. 432. EJ/en. Char.—Communicating to copper a filvery colour by friftion. 3 Exter. Char.— This fpecies is rarely found maflive, but ufually diffeminated, or fuperficial, fometimes im- perfeCUy cryftallized. . I he form of its cryftals is the oClahedron, dodecahedron, but it is ufually found in thin plates or leaves; luftre refplendent, or ftiining 1 fraCture conchoidal. ° Colour between ftiining or tin white, and filvery white, according to the predominance of the mercury or filver ; loft, and partially fluid ; brittle, and eafily frangible. Chem. Char—Expofed to heat the mercury is driven off, and the filver remains behind. Mercury Silver Conjlituent Parts. Heyer. 75 25 Klaproth. 64 IOO _ Localities,' &c.—This mineral is rare, and is met with, according to De Born, in the mines of mercury whofe 100 100 Part I. MINERALOGY. 221 Claflifica- whofe veins are croffed by veins of filver ores. It is bon- found chiefly at Rofenau in Hungary, in Moersfeld, U’“~v ' and Mofchellandfberg, in the duchy of Deux Fonts, and at Sahlberg in Sweden. It is ufually found in a yelknvhh or reddifh ferruginous clay, and accompanied by other ores of mercury. 3. Species. Corneous Ore of Mercury. Mercury mineralised by the vitriolic and marine acids, Kirw. ii. 229. La Mine de Mercure corne'e, Broch. ii. 101, Mercure muriate, Hauy, iii. 447. EJfen. Char.—Colour pearl gray, volatilized by the blow-pipe. Exter. Char.—Rarely found maflive or diffeminated, but ufually in thin crufts, or in fmall globules, com- pofed of an aflemblage of fmall cryftals, which are either perfect cubes, or fix-fided prifms, terminated by a four-fided pyramid ; a fix-fided prifm bevelled at the extremity j or an eight-fided prim with four broad and four narrow alternating faces. Cryftals fhining, fome- times refplendent •, internal luftre Aiming and adam¬ antine •, fradlure foliated. Colour fmoke gray, afti gray, or grayifti white 5 tranftucent; tender, and eafily frangible. Chem. Char.—Entirely volatilized before the blow¬ pipe, without leaving any refiduum, and without decom? pofition. The conftituent parts are about 70 of mercury, 29 of muriatic acid, and a fmall portion of fulphuric acid. Localities, &c.—This mineral has only been knowm about 13 years, f .d it is hitherto but rare. It was dif- eovered in the mercury mines of the duchy of Deux Fonts by Woulfe, and has been fince found at Almaden in Spain, and at Horfowitz in Bohemia. The repo- fitory is in the cavities of a ferruginous clay, which is mixed with malachite and gray copper ore. 4. Species. Liver or Hepatic Ore of Mercury. Mine de Mercure hepatique, Broch. ii. 104. Hepatic mercurial ore, Kirw. ii. 224. Mercure fulfuri bitumi- nifere, Hauy, iii. 446. This is divided into two fubfpecies, 1. compaft and 2. flaty. mercury ih Idria, where it forms confiderable beds, Metallic and yields about 60 per cent, of mercury. It is found , ies' alfo, along with other ores of mercury, in Spain and Siberia. Liver ore of mercury confifts of cinnabar, or the fulphuret of mercury, mixed with a portion of indura¬ ted bituminous clay. At Idria it is called branders, or coaly earth, on account of the predominance of the bitumen. 5. Species. Cinnabar. This fpecies is alfo divided into two fubfpecies, com¬ mon and fibrous. Subfpecies 1. Common Cinnabar. Le Cinnabre Commun, Broch. ii. 107. Dark Red Cin~ nabar, Kirw. ii. 223. Mercure Sulfure compaBe, Hauy, iii. 440. Exter. Char.—Found maflive or difleminated, or in fuperficial layers, or cellular and kidney-form, and alfo cryftallized. Forms of the cryftals are, a double four- fided pyramid with truncated fummits 5 a cube having its oppofite diagonal angles truncated ; a rhomboidal prifm j a three-fided prifm terminated by a three-fided pyramid, which alfo is truncated. The cryftals which are ufually fmall, are confufedly grouped together j furface of the rhomboidal prifm tranfverfely ftreaked, of the others fmooth ; external luftre fhining or refplen¬ dent ; internal the fame, or only glimmering, vitreous, or adamantine *, frafture foliated, uneven, or rarely fplintery ; fragments fharp-edged. Colour cochineal red, carmine red, and in fome va¬ rieties lead-gray; opaque, rarely tranflucent at the edges } cryftals tranflucent, or femitranfparent j ftreak fliining, fcarlet red ; tender, and eafily frangible. Spec, grav. 6.902 to 7*86. Chem. Char.—Before the blow-pipe common cinna¬ bar is entirely volatilized with a blue flame, and a ful- phureous odour. Conjlituent Parts. Mercury Sulphur Iron Lampadius. 81 15 4 Subfpecies 1. Compact Liver Ore of Mercury. Exter. Char.—Found maflive or difleminated ; luftre glimmering, metallic; fradlure even, fometimes fine¬ grained uneven ; fragments blunt-edged. Colour between lead gray, and cochineal red ; colour of the ftreak deep cochineal red, and fhining ; tender, and eafily frangible. Sp. gr. 7.18 to 7.93. Subfpecies 2. Slaty Liver Ore of Mercury. Exter. Char.—Found maflive ; luftre fliining and refplendent ; in the crofs fradlure glimmering ; luftre in general metallic, but fometimes vitreous ; principal frafture flaty, in curved thick leaves ; crofs fradlure compad and even ; fragments in plates. Colour of the preceding, but fomeivhat darker, and approaching to that of iron ; opaque ; ftreak (hining ; pow’der between cochineal and fcarlet red ; tender, and very eafily frangible. Localities, &c.—This is the naoft common ore of 100 „ Localities, &c. This is the moft common ore of mercury, and may be confidered as the gangue or ma¬ trix of the other ores. Found not only in primitive mountains, wdrere it forms beds in clay and chlorite flate, but alfo in ftratiform mountains, and even in al¬ luvial rocks. The mines of Almaden in Spain, of Idria in Friouli, and thofe of the duchy of Deux Fonts, have furniftied the greateft quantity of common cinnabar. It is alfo found in Bohemia, Saxony, and Hungary, and in fmall quantity in France. Subfpecies 2. Fibrous Cinnabar. Le Cinnabre d'un Rouge vif, Brochant, ii. iii. Bright red Cinnabar, Kirwan, ii. 229. Mercure fulfure Ji- breux, Hauy, iii. 440. Exter. Char.—Found maflive, difleminated, or fuper¬ ficial 222 Mcialhc iicial ; luftre glimmeririg, filky, often alfo entirely dull; . <;i2 fra&ure fine grained earthy, or fibrous: fragments blunt- edged. Colour bright fcarlet red, fometimes crimfon or au¬ rora red *, opaque ; ftreak fliining fcarlet red ; ftains j very tender or friable, and very eafily frangible. Localities, &c.“—This variety is very rare in a flate of purity. According to Haiiy, moft of the fpecimens owe their texture to an admixture of radiated fulphuret of iron. It has been found chiefly at Wolflfein in the Palatinate, where it is accompanied by brown iron ore and hematites. Cinnabar is dug out chiefly for the purpofe of extrafling the metallic mercury. It is employed alfo as a colouring matter in painting 5 but the cinnabar ufed for this purpofe is chiefly artificial. Some other varieties of cinnabar, or fulphuret of mer- cury, have been noticed by mineralogifls, as a native ethiops mineral. This is of a black colour, a loofe confidence, £nd it ftains the fingers. It appears to be fome bituminous fubftance penetrated with cinnabar. It is found at Idria. Alkaline cinnabar of De Born is found at the fame place ; is of a bright red colour, foliated fradlure, with rhomboidal fragments ; and fuppofed to be cinnabar penetrated with an alkaline fulphuret, the odour of which it gives out by friftion. Another variety of cinnabar, ufually called native vermilion, is in the form of powder. This fubftance is very rare, but is «lfo fometimes found at Idria. IV. SILVER Genus. MINERALOGY. # « per in the folution of nitrate of filver, the filver is re¬ duced, and appears in the metallic ftate. Localities, &c.—Native filver is not uncommon in moft of the mines which furnith the other ores of that metal. The accompanying fubftances are ufually heavy fpar, quartz, calcareous fpar, fluor fpar, pyrites, blende, cobalt, and galena. Native filver is very abundant in Mexico and Peru, and it is alfo not uncommon in Si¬ beria, in Germany, France, and was lately difcovered in the Herland mine in Cornwall. Subfpecies 2. Auriferous Silver. F.xter. Char.—Ihis variety is rarely found maftive, but is ufually difleminated in fmall particles, or fuperfi- cial, or reticulated, or in thin plates; luftre ftiining or refplendent ; fradfure hackly. Colour between filver white and brafs yellow, fome¬ times approaching to gold yellow ; it is loft, perfectly dudfile ; flexible without being elaftic, and its fpecific gravity is greater than common native filver in pro¬ portion to the quantity of gold with which it is al¬ loyed. Conjhtuent Parts.—Auriferous filver is a compound of filver alloyed with gold, the latter fometimes in very confiderable proportion. Localities, &.c.—This mineral (is very rare. It is found at Konigfberg in Norway, diffeminated in maflive calcareous fpar, fiuor fpar, and rock cryftal, accompa¬ nied by blende, galena, and pyrites, in a vein which traverfes a rock of flaty hornblende. It is alfo found in Siberia, in granular heavy fpar accompanied by vitreous filver ore, vitreous copper ore, and pyrites. 1. Species. Native Silver. Id. Kirvvan, ii. 108. Id. Brochant, ii. 114. Id. Haiiy, iii. 384. I his is divided into two fubfpecies, common and auriferous. Subfpecies 1. Common Native Silver. _ Exter. Char.— Common native filver is ufually found diffeminated or fuperficial, under different imitative forms, as dentiform, filiform, capillary, dendritic, reti¬ culated, veined, or in thin plates $ and fometimes cryf- tallized, in cubes, o&ahedrons, redlangular four-fided prifms, double fix-fided pyramids with truncated extre¬ mities, double three-fided pyramids with truncated angles, and hollow fcur-fided pyramids. The cryftals are fmall and grouped together in rows, or dendritical, Or reticulated ; furface fmooth ; that of the plates drufy, that of dentiform, filiform, and capillary filver j longi¬ tudinally ftreaked; external luftre glimmering or re¬ fplendent j'internal always glimmering, metallic ; frac¬ ture hackly •, fragments rather (harp-edged. Colour filvery wdiite, but fometiraes on the furface yellowifti-brown, or grayifti black j opaque 5 foft •, per- fe&Jy duiftile ; flexible, but not elaftic; ftreak (hining, metallic. Spec. grav. 10 to 10.47. Cherr. Char.-—Native filver is foluble in nitric acid, and may be precipitated by muriatic acid, the muriate of iilver being infoluble; or by immerfing 3 plate of cop- 2. Species. Antimonial Silver Ore. Argent Antimonial, Brochant, ii. 119. Id. Hatiy, iii. 391* Antimoniated Native Silver, Kirw'an, ii. no. EJfen. Char.—Colour filvery white ; brittle. Exter. Char—Found maflive or difleminated, kidney- form, or cryftallized in four-fided oblique prifms, in fix-fided prifms, fometimes with the lateral edges trun¬ cated, in fix-fided tables, and in cubes, having fome of the angles truncated. Surface of the cryftals longi¬ tudinally ftreaked ; luftre weakly fhining, or only glim¬ mering ; internal luftre (Lining or refplendent; frafture foliated. Colour filvery white, fometimes a fuperficial colour between yellow, black, and gray, or the colour of tem¬ pered fteel ; ftreak ftiining ; femihard. Spec. grav. 9.44. Chem. Char .—Before the bIowT-pipe it is eafily re¬ duced ; the antimony is driven off and gives out its pe¬ culiar odour, while the pure filver remains behind in- crufted wfith a brown flag, which communicates to bo¬ rax a green colour. When antimonial filver is diffolved in nitric acid, a whitifli cruft, w’hich is the oxide of antimony, foon ap¬ pears on the furface. 1 his mineral, as its name imports, is an alloy of fil¬ ver and antimony, in which fometimes a fmall portion of iron is obferved. The proportions of the two metals feem to be very variable. 2 Conjlituent I Part I. MINERALOGY. Chem. Char.—Corneous filver ore melts very eafily Conjlituent Parts. before the blow pipe, giving out a difagreeable fmell, KKproth. Vauquelin. and the globule of filver remains. 223 Metallic Ores. t 1 Silver 76 ^4 Antimony 24 16 IOO ICO Localities, &c.—This ore of filver is accompanied by calcareous fpar, heavy fpar, native filver, galena, and quartz, in a vein near the duchy of Furftenberg in Swabia. It has alfo been found in carbonate of lime and heavy fpar near Guadalcanal in Spain. 78 22 100 ConJHtuent Parts. Klaproth. Silver 67.75 Muriatic acid 21. Sulphuric acid .25 Oxide of iron 6. Alumina 1.75 Lime .25 Lofs 3. 100.00 3. Species. Arsenical Silver Ore. Id. Kirw. ii. in. Argent Antimonial Arfenifere, et ferrifere, Haiiy, iii. 398. Exter. Char.—Found maflive or diffeminated, kid¬ ney-form or globular, and alfo cryftallized in perfeft fix-fided prifms 5 in fimilar prifms a little flattened, and having the lateral edges rounded ; and in acute fix-fided pyramids with truncated fummits. Luftre weakly finn¬ ing, fometimes fhining ; internal luifre fhining or re- fplendent •, fra&ure foliated ; fragments fliarp-e^,ed. Colour tin-wdiite, or lead gray, but expofed ta the air yellowiih, or fteel gray j fireak fhining j foft; brittle. Chem. Char.—Before the blow-pipe the arfenic is driven off in fumes, diffufing the fmell of garlic j there remains behind an impure globule of filver. Conjt’ituent Parts. Silver Arfenic Iron Antimony Lofi Klaproth. 12-75 35* 44.25 4- 4* . 100.00 Localities, Sec.—This is a rare mineral, which has been found at Andreafberg in the Hartz, accompanied by native arfenic, red filver ore, galena, brown blende, and calcareous fpar. 4. Species. Corneous Silver Ore. Id. Kirwan, ii. 113. La Mine Corne, Broch. ii. 127. Argent Muriate, Hauy, iii. 418. Localities, &cc.—Muriate of filver is always found at the upper part of thevein, and it is faid that it fome¬ times accompanies organized fubflances. Leaves of na¬ tive filver have been found attached to petrifactions, at Frankenberg in Heflja 5 it is fuppofed that this metallic filver is the refult of the decompofition of the muriate of filver. Corneous filver ore is almoft always accom¬ panied by vitreous filver, footy filver, brown iron ore j. more rarely by native filver, red filver, galena, quartz, and heavy fpar. It is found in Peru and Mexico, in the mines of Freyberg in Saxony, at Allemont in France, and in Siberia. Another variety of muriate of filver has been de- feribed by fome mineralogifts under the name of earthy corneous filver ore j or, according to the fanciful Ger¬ man name, butter-milk earth. This variety has an earthy fraCIure, owing to a portion of alumina which is combined with it. It is almoft friable $ the luftre of the ftreak is refinous, and it feels fomewhat greafy. Chem. Char.—Before the blow-pipe it is ftightly ag¬ glutinated without melting, and fmall globules of filver exude from the mafs. ConJHtuent Parts. Klaproth. Silver Muriatic acid Alumina With a trace of copper 25 8 67 This variety is found at Andrealberg in the Hartz; Another variety has been deferibed under the name of alkaline filver ore, wdiich is nothing more than the mu¬ riate of filver combined with carbonate of lime. E/Jen. Char.—The colour ©f horn ; fufible like wTax. Exter. Char.—Rarely found maflive 5 fometimes dif¬ feminated in globular pieces, often in fuperficial layers, and very often cryftallized. The forms are, the per- feft cube, capillary or needle-formed cryftals' the cry- ftals are always fmall, and commonly grouped together. Surface fmooth, fhining or weakly Alining j internal luftre the fame ; refinous; fracture uneven, or flat con- choidal ; fragments blunt-edged. Colour light pearl gray, violet blue, ©r lead gray *, becomes brown or blackifli in the air j tranflucent 5 fometimes only at the edges; very foft; receives the impreflion of the nail; ductile, and in thin plates, flexi¬ ble. Spec. gray. 4.748 to 4.804, 5. Species. Sooty Silver Ore.. Id. Kim. ii. 117. DArgent Noir, Broch. ii. 132. Exter. Char.—Found maflive or diffeminated, perfo¬ rated or corroded ; in fuperficial layers upon other mi¬ nerals, or in rounded pieces, covered by muriate of fil¬ ver ; confiftence intermediate between folid and friable 5 dull j fratffure fine grained earthy j fragments blunt- edged. Colour bluifti black, or blackifh gray ; ftreak fliin- ing, metallic ; ftains a little ; eafily frangible. Chem. Char.—Melts eafily before the blow-pipe into a flaggy mafs, which, by continuing the heat, is par¬ tially volatilized, and the globule of filver remains. Its- * 1 22+ M I N E R Metallic Its conflituent p?.rts art Hill unknown ; as it is ufual- , ( re'i' ]y accoropanied by vitreous, corneous, and fome other filver ores, it is fuppofed to be a mixture of thofe ores in different proportions. Localities, &c.—Found in Saxony, in France, and in Hungary. 6. Species. Vitreous Silver Ore. Sulphurated Silver Ore, Kirw. ii. 115. L'Argent V1- treux, Brochant, ii. 134. Argent Sulphure, Hauy, iii. 39S. Exter. Char.—Commonly found maffive, diffemina- ted, or fuperficial 5 fometimes dentiform, filiform, ca¬ pillary, dendritic, or reticulated, with other forms and impreffions. It is alfo cryftallized in cubes, which are either perfed or truncated on the angles or edges; in odahedrons, which are either perfed, or truncated on the angles ; in flat, double, three-fided pyramids, the edges of the one correfponding to the faces of the other 5 in redangular four-fided prifms, terminated by a four-fided pyramid ; in equiangular fix-fided prifms, terminated at the two extremities by a three-fided pyra¬ mid ; correfponding alternately to three of the lateral edges, forming the garnet dodecahedron, of which all the lateral edges are fometimes flightly truncated ; in broad and flat fix-fided prifms bevelled at the extremity, and having the angles at the acute lateral edges trun¬ cated. The cryftals are commonly fmall, and grouped together in rows, or in knots, like the fteps of a flair $ the cube and the odlahedron are the moft common, and the cube is fometimes hollow. The furface of the cryftal is ufually fmooth, fometimes rough or drufy; luftre between Alining and weakly glimmering ; internal luftre firming, metallic ; fra&ure conchoidal, fometimes foliated j fragments blunt-edged. Colour dark lead-gray, fteel gray, or blackiflr gray, varying by expofure to the air j flreak flrining ; foft j dudile ; may be cut with a knife; flexible without be¬ ing elaftic. Spec. gray. 6.909 to 7.215. Chem. Char.—Before the blow-pipe vitreous filver is reduced to the metallic ftate, and the fulphur is driven off. By gradually heating it in a furnace, the fulphur may be diflipated without fufion, and the filver is redu¬ ced to the metallic ftate in a dendritical or capillary form, exadly refembling native filver. Conjlituent Parts. Bergman. Sage. Klaproth. Silver 75 84 85 Sulphur 25 16 15 100 i00 100 Localities, &c.—Vitreous filver is one of the moft common filver ores. It is ufually accompanied By heavy fpar, calcareous fpar, and fluor fpar •, along with the other ores of filver and lead, cobalt and blende. It is found in Bohemia, Saxony, Norway, Siberia, and South America. 7. Species. Brittle Vitreous Silver Ore. VArgent Vitreux Aigre, Brochant, ii. 138. Exter. Char.—Found maflive, difieminated, fuperfi- A L O G Y. Part I. cial, or cryftallized in equiangular fix-fided priims, the G’affifica- terminal faces being fometimes plane, and fometimes tlon' convex or concave ; the fame prifm truncated on its v terminal edges, or terminated by a fix-fided pyramid fit on the lateral faces, and having its fummit truncated j in equiangular fix-fided tables, or in very flat rhom¬ boids. Cryftals fmall, and grouped together •, furface fmooth, fometimes drufy ; prifms longitudinally ftreak- ed j luftre thining or refplendent ; internal luftre flrin¬ ing, or weakly ftrining •, frafture conchoidal, fometimes uneven $ fragments rather ftrarp-edged. Colour iron-black, or fteel or lead gray } foft j brit¬ tle. Spec. grav. 7.208. Chem. Char.—Before the blow-pipe it melts with dif¬ ficulty 5 fulphur, antimony, and arfenic, are partially driven off, and there remains a button of metallic fil¬ ver, which is not very dudliie, accompanied by a brown flag. Conjlituent Parts. Klaproth. Silver, 66.5 Sulphur, 12. Antimony, 1 o. Iron, _ 5. Copper and arfenic, .5 Earthy matters, I. Lofs, 5. 100.0 Localities, See.—This is one of the richeft filve'r ores5 and it is ufually accompanied by red filver ore, vitreous filver ore, fome other metallic ores, and various earthy fpars. It is pretty common in Saxony and Hungary, but lefs abundant than vitreous filver ore. It is alfo occafionally met with in moft other filver mines. 8. Species. Red Silver ore. Id. Kirw. ii. 122. Id. Broch. ii. 143. Argent Anti- monie Sulphure, Hatiy, iii. 402. This is divided into two fubfpecies; dark red, and bright red filver ore. Subfpecies 1. Dark Red Silver Ore. Exter. Char.—Found maflive or diffeminated, fuper¬ ficial, dendritical, or cryftallized in equiangular fix-fided prifm, which is either terminated by a three-fided pyra¬ mid fet on the lateral edges, or has its terminal edges truncated, or is terminated by an obtufe fix-fided pyra¬ mid fet on the lateral faces, and having the fummit and lateral edges of the pyramid truncated j fometimes the fummit of the pyramid is terminated by a fecond three- fided pyramid, and fometimes the lateral edges of the prifm are bevelled. The cryftals are fmall, and vari- oufly grouped together, commonly fmooth and refplend¬ ent, rarely ftreaked j internal luftre weakly fhining, or only glimmering, adamantine, often femimetallic; frafture ufually uneven, fometimes conchoidal j frag¬ ments rather blunt-edged. Colour between cochineal red and lead gray, and fometimes iron black j cryftals tranflucent j in maffes opaque ; ftreak but weakly ftiining, between cochineal red * 2 Part T. MINER red and crimfon red ; foft j brittle, and eafily frangible. Spec. grav. 5.56 to 5.58. Chem. Char.—Before the blow-pipe it derepitates and flies off before becoming red, and then melts with froth¬ ing up ; part is volatilized and lublimes in the form of a yellowifh white powder, and leaves a button of me¬ tallic filver. Its conftituent parts are fuppofed to be nearly the fame as the following. Localities, &c.—Found in alrnoft all filver mines, and is ufually accompanied by other filver ores, as well as different metallic ores. A L o G Y. Exter. Char.—Found maflive and diffeminated ; luftre ftrongly glimmering j fraffure even j fragments blunt-edged. Colour bright lead-gray, or fteel-gray j foft ; Break finning. Spec. grav. 5.3 22. Conjlituent Parts.—According to fome, this mineral is compofed of filver, antimony, and fulphur •, but ac¬ cording to others, minerals which have been reckoned white filver ores, contain a very confiderable proportion of lead, and therefore ought to be arranged among the ores of that metal. Such are the following analyfes by Klaproth. Meta' Ore: Subfpecies 2. Bright Red Silver Ore. Exter. Char.—Found maflive, diffeminated, or fu- perficial, and very often cryftallized. The forms of its cryftals refemble fome of thofe of the former, or are Ample fix-iided pyramids, or acute fix-fided pyramids, having the lateral angles alternately acute and obtufe, with the fummit furmounted by a three fided pyramid placed on the obtufe edges of the firft ; or furmounted by a fix fiued pyramid fet on the lateral faces. The cryftals ate fometimes acicular, and are combined to¬ gether in a fafcicular or reticulated form. Surface of the cryftals iometimes fmooth, fometimes drufy j ftreaked longitudinally, but the pyramids are ftreaked tranf- verfely or obliquely •, luftre refplendent or fhining ; in¬ ternal lu'ure fhining or weakly fhiniug and adamantine; fradlure conchoidal, or fine grained uneven ; fragments rather blunt-edged. Colour blood-red, or light cochineal red, fometimes bluifh on the furface; cryftals femitranfparent; in maffes tranflucent, often opaque ; ftreak aurora red ; foft, eafily frangible. Spec. grav. 5.44 to 5.59. Chew. Char.—Melts before the blow-pipe ; blackens, and burns with a bluifh flame, giving out white fumes with the odour of garlic. A button of nearly pure filver remains behind. ConJHtuent Parts. Silver, Antimony, Sulphur, Sulphuric acid and water, Oxygen, Klaproth. 62. 18.5 11. 8.5 100.0 Vauquelin. 56.67 16.13 I5-°7 12.13 100.00 The garlic fraell, which was formerly fuppofed to be owing to arfenic, arifes from the antimony, which is vo¬ latilized by the adlion of the blow-pipe ; although, ac¬ cording to Prouft, there are ores of red filver which contain fometimes arfenic and fometimes antimony fe- parately, and fometimes the turn metals combined. The red colour of this ore is by Thenard afcribed to the an¬ timony in the ftate of purple oxide. Localities, &.c.—Red filver ore is ufually accom¬ panied by native arfenic, other ores of filver, as well as other metallic ores; and it is found in Bohemia, Sax¬ ony, France, Spain, and Hungary. 9. Species. White Silver Ore. /75 2.25 100.00 100.00 Localities, &c.—The teal wdiite filver ore has been chiefly found in the mine of Himmelfurft, near Frey- berg in Saxony, in a gangue of quartz, and accom¬ panied by galena, red filver, and blende. 10. Species. Black Silver Ore. Exter. Char.—This ore of filver is of a cellular tex¬ ture ; the ftreak is fhining and metallic ; it is brittle, and of a black colour ; but it can only be known to be a filver ore by obtaining globules of filver under the blow'-pipe. It is ufually accompanied by vitreous red filver ores. It is fuppofed that it is fome of the other fpecies of filver ores that may have undergone fome change from chemical agents. The filver it con¬ tains is in very variable proportions. Localities, &c.—Found in fome of the filver mines at Freybergin Saxony, and Allemont in France. It is 'common in Peru and Mexico, and it is called by the Spaniards, negrillo. Befide the filver ores already defcribed, other fpecies have been mentioned by mineralogifts, the exiftence of which has not been diftimSlly afcertained ; as the car¬ bonate of filver of Widenmann and Kirwan, compofed of 72.5 parts of filver, 1 2 of carbonic acid, and 15.5 of carbonate of antimony and oxide of copper * ; the * jj reddith and greenifh black filver ore, alfo defcribed by Kirwan, which is fuppofed to be a mixture of native and fulphurated filver f. Light lamellar filver ore f compofed of alumina, fulphuret of filver, oxide of iron f Ibid and manganefe. V. COPPER Genus. 1. Species. Native Copper. Id. Kirw. ii. 128. Id. B.och. ii. 158. Id. Hauy, iii. 518. Effen. Char.—Colour reddiih yellow, and malleable. Exter. Char.—Native copper is found maflive, dif¬ feminated, fuperficial, or in rounded pieces; alfo den- dritical and capillary, and very often cryftallized in per- F f 226 • Metallic Ores. ' M I N E R fe^ cube?, ov with truncated edges or angles •, double four-fided pyramids ; Ample and acute tlrree-fided pyra¬ mids. Cryflals fmall, and grouped in a dendritical or botryoidal form ; lull re finning or weakly flrining j in¬ ternal ludre glimmering or weakly Ihining ; fradlure hackly; fragments blunt-edged. Colour light copper-red, but expofed to the air, yel- lowiib, blackilh, or greenifh j ftreak Hrining 5 foft, or femihard ; dudlile, and flexible, but not elaftic. Spec, grav. 7.72 to 8.58. Chem. Char.— Copper immerfed for fome time in a folution of ammonia, or volatile alkali, changes it to a beautiful blue colour. Localities, &c.—Native copper is not a very rare mineral ; it is found in many copper mines accom¬ panied by the Other ores of copper, as in the copper mines of Siberia, Saxony, Hungary, Sweden, and Corn¬ wall in England. 2. Species. Vitreous Copper Ore. u Kirw. ii. 144. Id. Broch. ii. 162. Cuivre Sulfure, Haiiy, iii. 551. ^ This is divided into two fuhfpecies; compaft and fo¬ liated. Subfpecies 1. Compact Vitreous Copper Ore. Ex ter. Char.—Found mafTiveordilTeminatedjfometimes fliperficial, and rarely cryftallized in perfecl cubes with convex faces ; in perfect oftahedrons, or in fix-fided prifms, terminated by a three-iided pyramid, fet on three of the lateral edges. Cryftals fmall j furface fmooth and fhining •, internal luflre llrongly glimmer¬ ing or fhining j fratlure rhomboidal or even, fragments rather (harp-edged. Colour lead-gray, iron gray, or yellowifh, but feme- times the colour of tempered fteel w hen tarnifhed \ ftreak fhining or refplendent 5 foft, and eafily frangible. Spec, grav. 4.81 to 5.338. CoTifiituent Paris. Klaproth. Copper 78.5 Sulphur 18.5 Iron 2.25 Silica .7 c 100.00 Subfpecies 2. Foliated Vitreous Copper Ore. Exter. Char.—Always found maflive or diffeminat- ed, rarely fuperficial j fra£lure foliated ; fragments blunt edged. Colour fimilar to the former, approaching a little more to fawn or yellowifh brown. Conjlituent Parts. Klaproth. Copper 50 Sulphur 20 Iron 2<; Lofs 5 100 Chcm. Char.—Vitreous copper ore is often fufible in the flame of a candle, and it melts eafily before the A L O G Y. part I. blow-pipe, and yields a button of copper enveloped in Claffifka- a blackilh flag 5 heated with borax, gives it a green co- ft°n* lour, and dsgefted in a folution of ammonia, changes it '' ^ to a fine blue. Localities, &c.—Vitreous copper ore is accompanied by quartz, calcareous fpar, heavy fpar, and the other ores of copper ; and is common in Siberia, Hungary, Norway, Germany, and Cornwall in England. 3. Species. Variegated Copper Ore. Purple Copper Ore, Kirwan, ii. 142. La Mine de Cuivre Panachee, Brochant, ii. 166. Cuivre Pyriteux He- patique, Hauy, iii. 536. Exter. Char.—Found maflive, difleminated, or fupet> facial, and fometimes, it is faid, cryftallized in octa¬ hedrons •, internal luftre fhining ; fraCture conchoidai, or fomewhat uneven ; fragments rather fharp-edged. Colour reddifh yellow, violet blue, azure blue, and greenifh 5 feveral colours exift on the fame fpecimen, giving it a variegated appearance, from which it has the name *, ftreak fhining ; powder reddiih ; foft, and eafily frangible. Conjlituent Parts. Copper > Iron Sulphur Oxygen Lofs Klaproth. 637 58 12.7 18 19. 19 4-5 5 .1 100.00 100 Localities, &c.—Variegated copper ore is accompanied by quartz, calcareous fpar, bituminous marly fchiftus, and other copper ores; and is found in Saxony, Hunga¬ ry, Sweden, Siberia, and England. 4. Species. Copper Pyrites. Id. Kirwan, ii. 140. Id. Brochant, ii. 169. Id. Hauy, iii. 529. Exter. Char.—Found maflive, diiTeminated, fome¬ times fuperficial, more rarely in imitative forms, as den¬ dritical, &c. but often cryftallized. Forms are, the te¬ trahedron, which is either perfeCl, or with its four angles truncated, giving it the appearance of a fix-fided table; the perfeft oCtahedron, the fummit terminated by a line ; a double cryftal formed of two tetrahedrons bafe to bafe, the angles of the bafes being (lightly truncated, produce three re-entering angles, and the lateral faces three falient angles. Cryftals are fmall ; furface fmooth, ihining ; internal luftre fhining or refplendent ; fraCture often uneven, fometimes conchoidai, fragments rather fharp edged. Colour in the frefh fraCture, brafs yellow, fometimes gold yellow, and fteel gray ; fometimes with varie¬ gated colours ; foft or femi-hard ; brittle. Spec. grav. 4.08 to 4.3. Chem. Char.—Before the blow-pipe it. decrepitates ; gives out a fulphureous odour ; fufes into a black glo¬ bule, and the heat being continued, metallic copper ap¬ pears. Borax heated with it acquires a green co¬ lour. • \ This Part I. MINERALOGY, 227 Claffifica- This ore of copper is compofed of fulphur, copper tl0n' and iron in variable proportions, and fometimes alfo a fmall admixture of gold or lilver. Localities, &c.—This is a very common copper ere. It is equally found in primitive and ftratiform mountains, either in veins or in beds, and fometimes in great abundance j in Saxony, Hungary, Sweden, France, and England. 5. Species. White Copper Ore. Id. Kirwan, ii. 152. Id. Brochant, ii. 173. Exter. Char.—Found maflive or difleminated ; in¬ ternal lufire weakly {hinmg ; fraddure fine grained, un¬ even 5 fragments rather flrarp edged. Colour between filver white and brafs yellow 5 femi- hard ; brittle. Spec. grav. 4.5. Chem. Char.—Before the blow-pipe it gives out a white fume, with the fmell of arfenic, and melts into a grayilh black flag. '{ his ore is laid to be compofed of copper, iron, ar¬ fenic and fulphur. * Metallic 7. Species. Black Copper Ore. , Qrcs- Id. Kirwan, ii. 143. Id. Brochant, ii. 180. Exter. Char.—Found in the Hate of powder, with a dull appearance, and little coherence, fometimes incruft- ing other ores of copper ,j ufually friable ; ftains •, feels meagre. Colour brownifh black, fometimes deep brown. Chem. Char.—Gives out before the blow-pipe a ful- phureous imeli, and melts with borax into a greenifh It is fuppofed to arife from the decompofition of vi¬ treous copper ore and copper pyrites, and contains fometimes from 40 to 30 per. cent, of copper. 8. Species. Red Copper Ore. Id. Kirwan, ii. 135. Id. Brochant, ii. 181. This is divided into three fubfpeciesj compaft, foliat¬ ed and capillary. Subfpecies 1. Compact Red Copper Ore. 6. Species. Gray Copper Ore. Id. Kirwan, ii. 146. Id. Brochant, ii. 175. Id. Hauy, 537- Exter. C/for.—Found maflive or difleminated, fuper- ficial, and often cryftallized in regular tetrahedrons, which are rare j or having all the edges truncated, or bevelled, fometimes fhghtly, and fometimes ftrongly ; or having each of its angles furmounted by a three lid- ed pyramid, fet on the lateral faces, with fome other modifications. Cryflals of various fizes ; furface fmooth, fhining j internal luftre between glimmering and re- fplendent •, frafture uneven, or conchoidal j fragments rather fharp edged. Colour fleel gray of various fliades, lead gray, and the tarniflied colours are often variegated ; ftreak black or brown j femi-hard 5 brittle. Specific gravity 4.44 to 4.86. Chem. C/for.—Before the blow-pipe it decrepitates, and melts into a brittle metallic globule of a grayifh colour, giving out a white fume, and communicating to borax a yellowifh red colour. Ccnjlituent Parts. Klaproth. Copper Sulphur Antimony Silver Iron .Lead Silica Alumina Lofs 16.25 10. 16. 2.25 34-5 2-5 4-75 100.00 3*.36 77 5 34-09 14.77 3-3 °-3 4.68 100.00 Localities, &c.—This mineral is moft frequently found in veins in primitive mountains, accompanied by other .ores, of copper, as in Germany, France, Sweden, Siberia, and in England. Exter. Char.—Found maflive, difleminated, or fu- perficial ; lutfre glimmering, femi-metallic ; frafture even, or flightly conchoidal j fragments rather (harp edged. Colour cochineal red, or lead gray 5 opaque *, ftreak Alining, of a brick red colour *, femi-hard, and brittle. Subfpecies 2. Foliated Red Copper Ore. Exter. Char,—Found maflive, difleminated, or fu- perficial, often cryftallized in octahedrons, which are either truncated on the angles or edges j in perfeft cubes, which are fometimes truncated on the angles, and fometimes on the edges. Cryftals fmall, ufually aggregated ; furface fmooth, Alining •, internally Aim¬ ing, or weakly Aiming, between metallic and adaman¬ tine ; fra&ure imperfe&ly foliated; fragments rather ftiarp edged. Colour fimilar to the former •, opaque, tranflucent at the edges ; cryftals femi tranfparent. Subfpecies 3. Capillary Red Copper Ore. Fibrous Red Copper Ore, Kirwan, ii. 137. Le Cuivre Oxide' Rouge Capillaire, Brochant, ii. 184. Exter. Char.— Found in fmall capillary cryftals, which are difleminated in fraall bundles, or fometimes form a fuperficial incruflation j luftre ftiining and ada¬ mantine. Colour carmine red, cochineal or fcarlet red ; cryf¬ tals tranflucent. Chem. Char.—Red copper ore is eafily reduced be¬ fore the blow-pipe without any odour 5 entirely foluble in muriatic acid without effei vefcence, but eifervefees in nitric acid ; by which means it may be diftinguiftied from cinnabar, which is infoluble, and from red filver ore, which diflfolves with effervefcence. The conftituent parts of red copper ore are fuppofed to be copper and oxygen, and not a carbonate of cop¬ per, as was formerly conjeflured. Localities, &c.—Red copper ore is found in various places accompanying the other ores of the fame metal, F f 2 and 228 Metallic Ores. and particularly native copper, ties are rare. MINERALOGY. Part I. The cryitallized varie- This fpecies is divided into two fubfpecies, earthy Clair.fica- and indurated. . tlon> 9. Species. Brick-red Copper Ore. Id. Kinvan, ii. 127. Id. Brochant, ii. 187. Of this alfo there are two fubfpecies, earthy and in¬ durated. Subfpecies 1. Earthy Brick-red Copper Ore. Exter. Char.—Found maflive or diiTeminated, or fu- perficial, in the fiffures of other copper ores, compofed of fine earthy particles (lightly cohering •, dull, friable, and (laining. Colour hyacinth red, reddiih brown, brosvnidi red, or yellow. Subfpecies 2. INDURATED BrICK-RED Copper ORE. Exter. Char.—Found maftive, diffeminated, or fu- perficial; luftre glircmering, or weakly (hining j frac¬ ture imperfectly conchoidal, even or earthy j fragments rather (harp edged. Colour deep hyacinth red, brownifh red, or deep brown j (freak (hining j foft, or femihard ; brittle. Chem. Char.—Before the blow-pipe it is infufible and blackens. The conftituent parts of this ore are fuppofed to be a mixture of red copper ore, or oxide of copper, and brown oxide of iron, in variable proportions. Localities, &c.—This ore is ufually found accompa¬ nying red copper ore. 10. Species. Emerald Copper Ore. Dioptafe, Hauy, iii. 136. Id. Brochant, ii. 511. EJJen. Char.—Divilible into an obtufe rhomboid, vvhofe plane angles are 111° and 69®. Exter. Char.—Found cryftallized in fix-fided prifms, terminated by a three-fided fummit, placed on the three alternate lateral edges •, luftre (hining, vitreous j frac¬ ture foliated } cleavage threefold, parallel to the lateral edges of the fummit. Colour emerald green ; tranflucent, or femi-tranfpa- rent; femi-hard. Spec. grav. 3.3. Chein. Char.—Infufible before the blow-pipe, but becomes brown, and tinges the flame of a candle yel- lowilh green. Conjlituent Parts. Vauquelin. Oxide of copper 28.57 Silica 28.57 Carbonate of lime 42.85 Lofs .01 100.00 Localities, &.c.—This mineral is found in Siberia, in a matrix covered with malachite. Subfpecies 1. Earthy Azure Copper Ore. Exter. Char.—Rarely found maflive, ufually diffemi¬ nated or fuperficial ; compofed of fine particles which are dull and fomewhat coherent ; frafture earthy. Colour fmalt blue, fometimes (ky blue j opaque j (tains a little 5 foft or friable. Subfpecies 2. Indurated or Radiated Azure Cop¬ per Ore. Exter. Char.—Rarely found maflive, fcmetimes diff feminated, often fuperficial, or in imitative forms, as ftalaftitical, botryoidal, &c. and alfo cryftallized in reftangular four fided prifms, terminated by four-fided acute pyramids fet on the lateral edges; in oblique four tided prifms, with two broad and two narrow faces, with a four-fided pyramid fet on the lateral faces; fome¬ times the lateral edges are truncated, and the termina¬ tion is by a fix-fided pyramid. Cryftals ufually fmall, and varioufly aggregated j broad faces of the prifms tranfverfely (freaked ; narrow faces longitudinally j luftre (hining or refplendent, vitreous j fradfure radiat¬ ed ; fragments blunt edged, or wedge lhaped. Colour light azure blue, Prufiian or indigo blue j tranflucent or femi-tranfparent *, (freak (ky blue ; foft , brittle. Spec. grav. 3.4 to 3.608. Chem. Char.—Soluble with effervefcence in nitric acid j nearly infufible before the blow-pipe, but is ea- fily reduced with borax, which affumes a fine green co¬ lour. Conjlituent Parts. Pelletier. Copper 66 Carbonic acid 18 Oxygen 8 Water 2 Lofs 6 100 Localities, Stc.—This variety of copper ore is not very abundant j but it^ficcompanies the other ores of copper, and other metallic ores, as thofe of lead, zinc, and iron. It is found in Bohemia, Norway, Siberia, and in the different mines of lead and copper in Bri¬ tain. The earthy variety is found in fuperficial layers on a flaty marl in Heflia, and it is alfo found fuperficial on fandftone in Thuringia. Sometimes the whole of the fandifone is impregnated with this earthy carbonate of copper, there called copper fand earth, or copper fand- Jlone. A fimilar fandftone, at Gourock near Greenock in Scotland, was a few years ago dug out for the purpofe of extrading copper. 11. Species, Azure Copper Ore, or Carbonate of Copper. Blue Calciform Copper Ore, Kirwan, ii. 129. DA- %ur de Cuivre, Brochant, ii. 190. Cuivre Carbonate' Bleu. Hauy, iii. 562. 12. Species. Malachite. Id. Kirwan, ii. 131. Id. Brochant, ii. 197. This fpecies is divided into two fubfpecies, fibrous and compaft. Subfpecies Part I. MINERALOGY. 229 Claffifica- tion. Subfpecies i. Fibrous Malachite. Cuivre Carbonate Vert Soyeux. Hauy, iii. 573. Exter. Char.—Rarely maflive, fometimes dilTeminat- ed, but often fuperficial, and in the form of fmall ca¬ pillary or acicular cryflals grouped together in different forms; luftre fhining, or when mallive glimmering • internal luftre weakly fhining, filky j fradture fibrous, ilraight, or radiated j fragments blunt edged. Colour, emerald or apple green j opaque ; ftreak of a lighter colour ; foft j brittle. Subfpecies 2. Compact Malachite. Exter. Char.—Sometimes found maffive, difieminated or fuperficial, but moll frequently globular, botryoi- dal, ftalaftitical, &c. 5 furface rough or drufy, fome¬ times fmooth, almoft alwTays dull, and rarely fhining } internal luftre dull or weakly ftiining •, fracture con- choidal j fragments rather lharp edged or wedge fliaped. Colour emerald green, apple green, and blackilh green j opaque j foft ) brittle. Spec. grav. 3.57 to 3'64- Chern. Char.—Decrepitates before the blow-pipe, and blackens without fufion ; effervelces with acids; colours borax green, and communicates a blue colour to the fo- lution of ammonia. ConjHtuent Parts. Klaproth. Compact malachite. Copper 58. Carbonic acid 18. Oxygen 12.5 Water 11.5 100.0 Localities, &c.—Both the fibrous and compadt ma¬ lachites are ufually found in the fame repofitory, and ac¬ companied with other ores of copper. They are found in Germany, but the fineft fpecimens are brought from Siberia. Scotland affords fibrous malachite in fmall quantity, as at Leadhills and in Shetland. Mala¬ chite is alfo met with in Cornwall and Derbyfhire in England. Vfes.—Malachite, when pure, is fometimes employ¬ ed as a pigment. The compadt variety is fufceptible of a fine polifti; which, with its beautiful and delicate colours, has brought it into much eftimation for various ornamental purpofes. The largeft and fineft fpecimen of compadf malachite known, is in the cabinet of Dr Guthrie at Peterfburgh. It is 32 inches long, 17 broad, and two inches thick. It is eftimated, according to the account of Patrin, who defcribes it, at 20,000 francs, above 8001. fterling. If we are rightly informed, this fplendid mafs of malachite was once offered to fale in Britain, but, having found no purchafer, wTas carried back to Ruflia. 13. Species. Green Copper Ore. Mountain Green, Kirw. ii. 134. Id. Broch. ii. 203. Exter. Char.—Found maffive or diffeminated, but ufually fuperficial on other ores ; dull 5 fradlure con- Metallic choidal or uneven ; fragments blunt-edged. , ef' Colour verdigris green, emerald green, fometimes Iky blue, opaque, or tranflucent at the edges; foft, or friable ; brittle. Chem. Char.—Becomes black before the blow-pipe without fufion. Colours borax green. Conflituent Parts.—Suppofed to be a mixture of oxide of copper, or according to others, a carbonate, with alu¬ mina and lime. Localities, &c.—It is ufually accompanied by gray copper ore, and fome other copper ores, particular¬ ly with malachite, and fometimes with iron ochre, alumina, and quartz. Found in Saxony, Hungary, and Siberia. 14. Species. Ferruginous Green Copper Ore. This is divided into two fubfpecies 5 1. earthy ; and, 2. flaggy. Subfpecies 1. Earthy Ferruginous Green Copper Ore. Iron-Jhot Mountain Green, KirwT. ii. 155. Id. Broch. ii. 205. Exter. Char.—Found maffive, but moft frequently diffeminated j dull, wfith an earthy tradfure ; fragments blunt-edged. Colour light olive green 5 foft, friable 5 brittle } me- gre to the feel. Subfpecies 2. Slaggy Ferruginous Green Copper Ore. GlaJTy Iron-Jloot Mountain Green, Kirw. ii. 152. Exter. Char.—Maflive, or diffeminated ; luftre fhin¬ ing, vitreous; fradlure conchoidal; fragments fharp- edged. Colour deep olive green, fometimes black j foft j brittle. Conjlituent Parts.—Seems to be a mixture of oxide of copper with iron ochre, in variable proportions. Localities, &c.—Found along with other copper ores, and is accompanied by iron ochre, heavy fpar and quartz. It is a rare mineral. Has been found in Sax¬ ony, and it is faid in the Hartz. 15. Species. Micaceous Copper Ore, or drfeniate of Copper. Olive Copper Ore, Kirw. ii. 151. Le Cuivre Arfenical, Broch. ii. 208. Cuivre Arfcniate, Hauy, iii. 575. Ar~ feniate of Copper, Bournon, Phil. Tranf. 1801. p. 193. This fpecies is divided into two fubfpecies, foliated and lenticular. Subfpecies 1. Foliated Micaceous Copper Ore. Exter. Char.—Found maffive, diffeminated, or cry- ftallized in oblique four-lided prifms, in fix-fided prifms, in acute rhomboids, or in very imall cubes. Thefe cry- ftals are alfo varioufly modified ; lateral faces ftreaked longitudinally; luftre refplendent, pearly, or adaman¬ tine ; fradlure foliated, fometimes conchoidal. Colour olive green, fometimes emerald green, or ver* digris 5 Met '.Hie Ores. MINER dlgris green-, tramlucent; cryftals femitranfparent; foft. Spec. grav. 2.54. SuhTpecies 2. Lenticular Micaceous Copper Ore. Kxfer.Char.—1 his variety is found cryflallized In ofhihedrons, compofed of two four-fided pyramids, with ifofceles triangular faces ; cryflals fmall 5 external luilre Alining j fraftue foliated. Colour Iky blue, or verdigris green 5 feratches calca¬ reous fpar ; brittle ; eahly frangible. Spec. grav. 2.88. Chem. Char.— I he cryftals of thefe varieties decre¬ pitate before the blow-pipe, and give out the odour of arfenic. I hey mel? » o a grayifh globule, which being treated with borax, yields a button ©f copper. Conjlituent Parts. Vauquelin. Oxide of copper Arfenic acid Water Lofs 39 43 i? . 1 100 Localities, Stc.—Thefe varieties of copper ores are very rare j and have been hitherto difeovered only in the Carrarach mine, Cornwall, accompanied by brown iron ore and other copper ores. Other arfeniates of copper have been deferibed by Bournon. In many refpfebls they referable the prece¬ ding varieties. The fpec. grav. which is 4.28, is confi- derably greater, and yet the proportions of the conftitu- ent parts approach very near. Conjlituent Parts. Chenevix. Haematitiform. Oxide of copper 50 Arfenic acid 29 Water 21 Lofs — Capillary. 51 29 18 100 100 Fo'iated. 54 3° 16 100 Count de Bournon has deferibed another, under the name of cupromartial arfeniate, which is alfo cryftal- lized, has a fpec. grav. 3.3, and the following are its conftituent parts. Oxide of iron — copper Arfenic acid Silica Water Xnofs Cbenevix, 27-5 22.5 33-5 3- 12. '■S 100.0 16. Specie?. Muriate of Copper, or Green Sand of * Peru. Id. Broch. ii. 149. Id. Broch. ii. 545. Exter. Char.—1'ound maftive, or cryftallized in very fmad fix-lided prams, bevelled at the extremities, or in fmall oblique four-fided prifms, alfo bevelled at the extremities, but the fides correfponding to the obtufe 3 A L O G Y. lateral edges $ furface of the cryftals fmooth and re- fplendent; luftre adamantine; fracture foliated j frag¬ ments rather fharp-edged. Colour between emerald and leek green 3 opaque ; cryftals a little tranfpaffcnt ; foft 3 ftrgak pale apple green. Spec. grav. 3.57 to 4.43. Chem. Char.—Thrown on burning coals, it commu¬ nicates a green colour to the flame 3 foluble in nitric acid without effervefcence. Conjlhucnt Parts. Proud. A__, .—, Oxide of copper 76.6 70.6 Muriatic acid 10.6 11.4 Water 12.8 18.1 100.0 IOO.o Klaproth. 73- jo. t 16.9 100.0 Localities, &c.—This mineral has been found in the fand of rivers, accompanied by quartz, fchorl, copper and iron ores, near Remolinos in Chili. It has alfo been found in a fimilar fituation in Peru. > Phosphate of Copper.—This mineral has been found maffive, or cryftallized in oblique lix-fided prifms, with convex faces, lining caviuesj luftre refplendent, be¬ tween vitreous and adamantine 3 internal luftre filky 3 fracture fibrous. Colour grayifh black, but internally emerald green 3 opaque 3 ftreak apple green 3 foft, or femi-hard. Conjlituent Parts. Klaproth. 68.13 3°-95 .92 100.00 Oxide of copper Phofphoric acid Lofs Localities, &c.—This mineral has been found near Bologne, along with malachite, in a white drufy quartz. Copper Mines.—In addition to the hiftory of copper ores now given, we fhall juft name fome of the more celebrated copper mines in the world. The copper mines of Spain are fituated on the frontiers of Por- tugal, and yield from veins of confiderable thicknefs, yellow- pyrites. France peflefies copper mines in the Pyrenees, near Lyons, in Vofges, and in the neigh- hood of Savoy, in the department of Mont Blanc. There are extenfive copper mines in Piedmont, which have been wrought to a very confiderable depth. The copper mines of Cornwall in England, which are in primitive rocks, have been long celebrated. The moft abundant ores are copper pyrites, accompanied by native copper, which latter, it is oblerved, is moft ufually found near the furface. The fame mines yield all the varieties of arfeniate of copper. The Affton copper mines on the borders of the counties of Derby and Stafford are fttu- ated in limeftone, in very declining or nearly perpen¬ dicular beds 3 but the richeft copper mines in Eng¬ land are thofe of the ifland of Anglefea, where is a mafs of pyritous copper ore of immenfe thicknefs, yielding from 16 to 40 per cent, of copper. Native copper is alfo found near the furface, and immediately under the turf. Fart I. Claffifica- tion. This' Part T. M I N E R A L O G Y Claflifica- The mines of Cronebane, in tbe county of Wicklow ln Ireland, are very confiderable. They are fituated in a primitive mountain, compofed of flinty date and argillaceous fchiftus, which alternate with beds of llea- tites. In Germany, Hungary, Sweden, Norway, and Sibe¬ ria, there are many extenfive and valuable copper mines. In the eaftern parts of the Afiatic continent, in the ifland of Japan, in China, and in fomenf theiflands of the In¬ dian ocean,.rich copper ores are abundant. Africa, in various places of that extenfive region, abounds with ores of copper, as in the mountains to the north of the Cape of Good Hope. On the weftern coaft of Africa, the natives dig out copper ore, and are acquainted with the mode of extracting it. In North America mafles of native copper have been found, near Hudfon’s Bay ; but the richeft copper mines in the world are thofe of South America, and particu¬ larly in Chili, from which mafies of native copper of imtnenfe magnitude have been obtained. The cop¬ per mines of Peru and Mexico are allb wrought to great advantage. VI. IRON Genus. 1. Species. Native Iron. Id. Kirw. ii. 156. Id. Brochant, ii. 215. Id. Haiiy, iv. i. ' Exter. Char.—Found maffive or branched ; furface fmooth, fhining; internal luftre Ihining, metallic ; frac¬ ture hackly ; fragments rather (harp-edged. Colour light (teel gray, or filvery white ; femi- hard 5 ftreak fhining ; perfectly duCtile ; flexible but not elaftic. Localities, &c.—The exiflence of native iron as a terreflrial production ftill remains doubtful. It is faid that it has been found-along with other ores of iron, in Saxony and in France. The only inftances fully eflablilh- ed of the difcevery of native iron, are thofe of the im- menfe mafs found by Pallas in Siberia, which amounted to no lefs than i68olb. or 15 cwt. and another of q cwt. which was difcovered by Rubin de Celis in South Ame¬ rica ; but thefe mafies correfpond fo nearly with the Jubilances which are certainly known to have fallen from the atmofphere, in their conftituent parts, that it feems extremely probable they have had a fimilar ori¬ gin. But for a full account of this curious fubjedl, fee Meteorolite. 2. Species. Iron Pyrites. Martial Pyrites, Kirwan. ii.'^b. Id. Brochant, ii. 221. Fer fulfuid, Haiiy, iv. 65. Subfpecies 1. Common Iron Pyrites. Exter. Char.—Found maffive or difleminated, fuper- fcial, or in imitative forms, and frequently cryftallized. The forms are, a perfeft cube with plane or convex faces ; or with truncated angles, or edges j or having a three-fided pyramid on each angle ; the perfeft oda- hedron, or truncated on all its angles ‘ the dodecahe¬ dron with pentagonal faces, or with fix oppofite and pa¬ rallel edges truncated, or truncated on eight of its an¬ gles j or the perfeCl icofahedron, which is rare. Cryflals fmall, excepting the cube, and grouped to- Metallic gether ; furface fmooth or ftreaked * luftre fhining, re- °rcs- fplendentj internal luftre fhining, metallic; fraCture un- ' even ; fometimes conchoidal ; fragments rather (harp¬ ed ged. Colour bronze yellow, golden yellow, fometimes fteel gray ; opaque ; hard ; brittle ; rather eaftly frangible. Spec. grav. 4.6 to 4-83. Chem. Char.—Before tbe blowr-pipe it gives out a ftrong fulphureous fmell, and burns with abluifh flame ; a brownifh globule is then obtained, which is attrafted by the magnet. Conflituent Parts. Hatchett. Sulphur 52.15 52.5 Lon 47.85 47.5 100.00 100.0 Some varieties of common iron pyrites contain a mix¬ ture of gold, which is fuppofed to be accidental, as the external characters are not affeCled by it, and it is onl^ recognifed by chemical analyfis. Thefe varieties are called auriferous pyrites. Subfpecies 2. Radiated Iron Pyrites. Exter. Char.—Found maffive, or in different imita¬ tive forms, and alfo cryftallized in fmall cubes or oc¬ tahedrons ; furface fmooth or drufy ; luftre fhining or refplendent ; fraClure radiated; fragments wedge- fhaped. Colour bronze yellow, lighter than the former ; fome¬ times fteel gray, and fometimes tarnifhed; hard ; brit¬ tle, and ealily frangible. Subfpecies 3. Capillary Iron Pyrites. Exter. Char.—Found in fmall, capillary, or acicular cryftals, having the appearance of flocks of wool; fome¬ times the cryftals are acicular or in a ftellated form v luftre fhining or weakly fliining, metallic. Colour bronze yellow, approaching to fteel gray. Subfpecies 4. Hepatic Iron Pyrites. Exter. Char.—Maffive or diffeminated, or in diffe¬ rent imitative forms, as ftalaCHtical, cellular, &c.; fome¬ times cryftallized in perfeft fix-fided prifms, or in fix- fided tables, which are either per feel or bev- lied on the terminal faces. Cryftals fmall; fometimes fmooth ; fometimes drufy; internal luftre glimmering, or weakly fhining ; fra&ure even, or imperfeflly conchoidal; frag¬ ments {harp-edged. Colour bronze yellow, fteel-gray, fometimes brownith or tarnifhed ; ftreak ffiining ; hard ; brittle. Physical Char. By rubbing gives out a fulphureous odour, and, according to fame, the fniell of arfenic. ^ Con/lituent Parts.—According to fome mineralogifts, this variety is compofed of fulphur and iron, with a per- tion of arfenic. Localities, Ss,c.—I he fiift variety is umverfally dif- fufed ; it is found in every kind of rock, and often in great abundance. I he fecond is rarer ; but is not uncommon in veins of lead and filver, arid fometimes in nefts in indurated marl. It is found in Saxony $nd Bohemia, in Derby- fhire e 232 . Metallic fliire In England, and at Leadhills and the ifland or , 0‘'es• May in Scotland. This variety is more fubje£t than the firft to decom- pofition. Capillary pyrites is only found in fmall quantity, as in Saxony, and Andreafberg in the Hartz. Hepatic pyrites is only found in veins, particularly thofe of diver and lead, accompanied with quartz, cal¬ careous rpar, and heavy fpar, as in Germany and Siberia, and at Wanlockhead in Scotland. Expofed to the air, this variety is extremely liable to decompolition. 3. Species. Magnetic Pyrites. Id. Kirwan. ii. 79. Id. Brochant, ii. 232. Exter. Char.—Maflive or diffeminated j internal luf- tre fliining or weakly flhining ; fra&ure uneven, rarely conchoidal •, fragments rather {harp-edged. Colour between copper red and bronze yellow ; when expofed to the air it becomes brownilh or tarnifhed j hard, or femihard 5 brittle. Spec. grav. 4.5 Phijs. Char.—This variety of pyrites a£ts on them ag- netic needle, but not very powerfully. Che-m. Char.—Before the blow-pipe it gives out. a flight odour of fulphur, and melts eafily into a grayifli black globule, which is attradled by the magnet. Conjlitucnt Parts. Hatchett. Iron 63.5 Sulphur 36.5 100.6 Localities, &c.—Magnetic pyrites has been only found in primitive rocks, as in micaceous fchiftus 5 and is ufually difpofed in beds, along with other ores of iron, and accompanied by quartz, hornblende, and garnets. It is found in Saxony, Bavaria, Bohemia, and in Caernarvonfliire in Wales. XJfes.—This, as well as the former fpecies, is employ¬ ed for the purpofe of extrafting fulphur, or of manufac¬ turing copperas, or fulphate of iron. 4. Species. Magnetic Iron Ore. Magnetic Irotijlone, Kirwan, ii. 158. Id. Brochant, ii. 235. Per Oxidule, Hauy, iv. 10. This is divided into two fubfpecies, common and are¬ naceous. Suhfpecies 1. Common Magnetic Iron Ore. Exter. Char.—Maflive or diffeminated, and often al- fo cryflallized in fix-fided prifms, having a three-fided pyramid at each extremity, fet on three alternate lateral edges ; an oblique four-Cded prifm ; a double four- fided pyramid, or perfedl o£lahedron, which is fome- times truncated on all its edges. Cryflals of various flzes ; faces fometimes fmooth j thofe of the four-fided prifm ftreaked tranfverfely •, luflre Alining ; internal luftre refplendent, or weakly glimmering ; fraflure un¬ even, fometimes conchoidal or foliated j fragments ra¬ ther blunt-edged. 4 Fart L Colour iron-black, perfect black, or fteel-gray 5 Clafliflea- ftreak brownifli black 5 femihard, or hard j brittle j t~0D' , more or lefs eaflly frangible. Spec. grav. 4.2 to 4 93. v Subfpecies 2. Arenaceous Magnetic Iron Ore. Exter. Char.—Found in rounded grains, from the fize of millet to that of a nut, and fometimes in fmall odtahedral cryftals ; external furface rough or weakly glimmering •, internal {Inning or refplendent ; fracture conchoidal ; fragments (harp-edged. Colour deep iron-black, fomet’.mes afli gray. Phyf Char.—Magnetic iron ore, as the name im¬ ports, flrongly attrafts the magnetic needle, and iron filings j to the compadt varieties of this ore, in which this property was firft difcovered, the name of natural magnet is given. Chetn. Char.—Magnetic iron ore becomes brown be¬ fore the blow-pipe, and colours borax dark green. Conjlituent Parts.-—This is fuppofed to be an oxide of iron in confiderable purity, as it yields from 80 to 90 per. cent of metallic iron. Localities, &c.—Common magnetic iron ore is very common in primitive mountains, particularly in thofe of gneifs and micaceous fchiflus, where it forms very powerful beds, and even entire mountains. It is dif¬ feminated in cryftals in chlorite fchiftus, as in Corfica, and in bafalt and greenftone, at Taberg in Sweden, Found in Saxony, Bohemia, and Italy, and particularly in the ifland of Elba in the Mediterranean j and indeed is very univerfally diftributed over every part of the globe. The fecond variety, or magnetic fand, is found in the beds of rivers, in a loofe ftate, and fometimes im¬ bedded in bafalt and wacken. It is found in thofe countries where the other ores of iron abound ; and alfo in the fand of many of the rivers within the torrid zone, as in Jamaica, St Domingo, &c. LJfes.—Magnetic iron is wrought for the purpofe of obtaining metallic iron. Moft of the Swedfth iron ores belong to this variety, and furniflr the iron which is fo celebrated on account of its fuperior qualities, throughout Europe. Magnetic fand,“ where it is abundant, is alfo fmelted as an iron ore. 5. Species. Specular Iron Ore. Id. Broch. ii. 242. Id. Kirvv. ii. 162. Micaceous Iron Ore, ibid. 284. Fer Oligtjle, Hairy, iv. 38. This fpecies is divided into two fubfpecies, common and micaceous. Subfpecies i. Common Specular Iron Ore. Exter. Char.—Maffive or diffeminated, but moft fre¬ quently cryftallized in doubled three-fided pyramids, flattened, and the lateral faces of the one fet on the la¬ teral edges of the other $ the fame pyramid with the angles at the common bafe truncated 5 in perfect cubes, having the angles truncated j or the cube confidered as a double three-fided pyramid ; or as a rhomboid, in which the fummits are furmounted by an obtufe three- fided pyramid, fet on the lateral faces j the fame cube bevelled at each of the angles of the common bafe j in fix-fided tables varioufly modified, or in perfect lenfes. Surface mineralogy. Part I. MINER Claffifica- Surface of the cryftals fmooth, refplendent j inter- don. naj iuftre weakly (tuning or refplendent j fradure un- even, fometimes conckoidal or foliated ; fragments fharp-edged. Colour (feel gray, bluidi, or reddifti ; fometimes with tarnilhed colours, which are iridefcent j (freak dark cherry-red j hard 5 opaque ; brittle. Spec. gray. 4.79 to 5.21. C/iem. Char.— Before the blow-pipe it is infuiible ; but heated on charcoal becomes white, and melts with borax into a dirty yellow’ (lag. 'Phjf. Char.-—Affe6ts the magnetic needle, but does not attrad iron filings. ConjUtuent Parts.—This variety is fuppofed to be a pretty pure oxide of iron, yielding from 60 to 80 per cent, of iron. Of this fubfpecies twro varieties have been formed, compad and foliated, depending probably on the ap¬ pearance of the fradure. Subfpecies 2. Micaceous Iron Ore. Exter. Char.—Maflive, or diffeminated, or in thin fix-fided tables, fo grouped together as to appear cellu¬ lar ; fuiface (mooth, refplendent j internal luftre re- fplendent •, fradure foliated j fragments in tables. Colour iron-black, (feel-gray, or dark red 5 in thin plates (lightly tranflucent j (freak dark cherry-red 5 fe- mihard ; brittle. Spec. gray. 4.5 to 5. Localities, &e.—Thefe varieties are found in primi¬ tive mountains, in beds or veins, accompanied by other ores of iron, and in fuch quantity in many places as to be dug out for the purpofe of manufadure, as in Ger¬ many, France, Ruflia, Sweden, Siberia, and particularly in the iflands of Corfica and Elba, which furnifh the fineif fpecimens of fpecular iron ore for the cabinet. The latter variety is found in England, and fome parts of Scotland. * 6. Species. Red Iron Ore. This is divided into four fubfpecies 3 1. red iron froth ; 2. compad 3 3. red haematites 3 and, 4. red ochre. Subfpecies 1. Red Iron Froth. Id. Broch. ii. 249. Red Scaly Iron Ore, Kirw. ii. 172. Exter. Char.—Sometimes maffive, and frequently fuperficial 3 lutfre glimmering or (hining, ufually com- pofed of fcaly friable particles which (fain (trongly 3 feels greafy. Colour dark cherry-red, blood-red, brownifh-red, or If eel-gray. Chem. Odr.-—Blackens before the blow-pipe. Conflituent Parts. Henry. Iron, 66. Oxygen, 28.5 Silica, 4.25 Alumina, I-25 *Nicb. ^ovr. 4to, iii. 455. 100.00 * Localities, &c.—A rare mineral, ufually incrufling other ores of iron. Found in Germany, and in Corn¬ wall and at Ulverftone in Lancafhire in England. Vol. XIV. Part I. A L O G Y, 233 Metallic Subfpecies 2. Compact Red Iron Ore. °^es- . Id. Broch. ii. 251. Id. Kirw. ii. 170. Exter. Char.— Maffive or difleminated, in imitative forms, as cellular, &c. or cryftallized in perfed cubes, or four-fided pyramids with truncated fummits. Sur¬ faces of the cube fmooth 3 that of the pyramids rough and dull j internal luifre glimmering 3 fradure even, fometimes uneven or conchoidal 3 fragments rather blunt-edged, Colour browniffi-red, dark (feel-gray, fometimes blood-red 3 femihard ; brittle 5 (freak blood-red 3 (tains. Spec. grav. 3.4 to 3.8. Chem. Char.—Infufible before the blow-pipe. Confiituent Parts. Lampadius. Oxide of iron, 65.4 Silica, 20.7 Alumina, 9.3 Oxide of manganefe, 2.7 Lofs, „ 1.9 ICO.O Localities, &c.—Found along with other iron ores, abundant in Cumberland and Lancaffiire, and various places of the world. Subfpecies 3. Red Haematites. Id. Kirw. ii. 168. Id. Broch. ii. 254. Exter. Char.—Maffive, and in various imitative forms 3 furtace fmooth -or drufy ; internal luffre (hining, or only glimmering ; fradure fibrous 5 fragments u^edge- (haped. Colour browniffi-red, (feel-gray, or blood-red ; (freak light blood-red 3 hard or femibard j brittle; (tains. Spec. grav. 4.7 to 5. Conjhtuent Parts.—It yields from 60 to 70 per cent, of iron, and contains, it is fuppofed, a portion of alumi¬ na, filica, and manganefe. Localities, &c.—This ore of iron is not very com¬ mon, although in fome places it is very abundant, as in the weft of England. It is difpofed in veins and beds, accompanied by the former variety. Subfpecies 4. Red Ochre. Id. Kirw. ii. 171. Id. Broch. ii. 256. Exter. Char.—Found maffive, diffeminated, or fuper¬ ficial 3 dull 3 fradure earthy. Colour between blood-red and browniffi-red 3 (tains much 3 foft j often friable. Localities, &c.—This variety ufually accompanies the former, and is a very fufible iron ore. 7. Species. Brown Iron Ore. This is divided into four fublpeciesj 1. brown iron froth 3 2. compad 3 3. brown haematites 3 and, 4. brown ochre. Sub'pecn s 1. Brown Iron Froth. Brown Scaly Iron Ore, Kirw, ii. 166. Le Eifenrahm brun, Broch. ii. 258. G g Exter. 234 . Metallic Exter. Char.—Maflive or diiTerainated, often fuperfi- , <,rc9' cial, or fpumiform •, ftrongly glimmering or fliining ; v frafture foliated or compadl. Colour between brown and dull gray ; very foft ; al- moft friable \ flains j feels greafy } nearly fwims on water. Chetn. Char.—Blackens before the blow-pipe without fufion. Localities, $tc.— Accompanies other iron ores, as in Saxony, but is rare. Subfpecies 2. COMPACT BROWN Iron Ore. Exter. Char.—Maffive or difleminated^ fometimes in different imitative forms 5 dull, or rarely glimmering j frafture fmooth, earthy, or conchoidal. Colour clove brown, or browmilh yellow’ j flreak yel- lowifh brown j femihard j brittle. Spec. grav. 3,07 to 3-75- . . ' . , Localities, &c.—In veins or beds, accompanied by other iron ores, in various parts of the world. Subfpecies 3. Brown Haematites, Id. Kirw. ii. 163. Id. Broch. ii. 261. Exter. Char.—Maffive, but moft frequently in dif¬ ferent imitative forms ; furface fmooth, granulated, rough or drufy \ luflre fhining; internal luftre glim¬ mering or weakly fhining ; fraflure fibrous 5 fragments fplintery, or w?edge-fhaped. Colour clove browm, blackifh brown, fometimes yel¬ low, and fometimes with tarnifhed colours •, opaque ; flreak -yellowifli brown ; femihard j brittle. Spec. grav. 3.78 to 4.02. Localities, &c.—Always accompanies the preceding variety, but in fmaller quantity. Subfpecies 4. Brown Ochre. Id. Kirwn ii. 167. Id. Broch. ii. 263. Exter. Char.—Maffive or diffeminated } dull j frac¬ ture earthy ; fragments blunt-edged. Colour yellowifh brown, or ochre yellow; foft 5 fometimes friable ; flains more or lefs. Localities, &c.—Always accompanies compaft brown iron ore, and is therefore found in fimilar places. 8. Species. Sparry Iron Ore. Id. Brochant, ii. 264. Id. Kirw. ii. 190. Exter. Char.—Maflive, diffeminated, fometimes with impreffions, and often cryflallized. Its forms are, the rhomboid with plane or convex faces, or having two oppofite angles ftrongly truncated j and the lens, the equiangular fix-fided prifm, or the Ample or double four-fided pyramid. Cryftals fmall) furface fmooth, fometimes drufy, fometimes a little rough 5 luftre fhin¬ ing and fomewhat metallic \ internal luftre fhining, rare¬ ly refplendent, between pearly and vitreous j fradture foliated $ fragments rhomboidal. Colour yellowifh gray, grayifh white, and expofed to the air, blackifh brown, or with tarnifhed colours j fometimes tranflucent at the edges j thofe of a dark co¬ lour, opaque ; femihard, or foft) brittle. Spec. grav. 3.6 to 4. Part L Chem. Char.—Before the blow-pipe it blackens with- Claffifica- out fufion. , tl^n’ , Conjlituent Earls.—According to Bergman, this mi¬ neral contains equal parts of carbonate of lime and of iron, with about one-fourth of manganefe. Localities, &c.—Found equally in primitive and ftra- tiform rocks, and always accompanied by calcareous fpar, and other ores of iron, as in Saxony, France, Bri¬ tain, and Ireland. 9. Species. Black Iron Ore. Id. Kirw. ii; 167. Id. Broch. ii. 268. This fpecies is divided into two fubfpecies : 1. com¬ pact j and, 2. black haematites. Subfpecies 1. Compact Black Iron Ore. Exter. Char.—Maffive, or in various imitative forms j furface rough or dull j internal luftre glimmering } fradture flat conchoidal j fragments fharp-edged. Colour between fteel gray and bluifh-black j femt- hard ; brittle. Subfpecies 2. Black Haematites. Exter. Char.—Maflive or kidney-form ^ internal luftre glimmering and firming j fradture fibrous, (ome- times even 5 fragments vvedge-lhaped. Colour fteel gray. Conjlituent Parts.—This ore is fuppofed to contain a larger proportion of manganefe, with alumina and lime, than other ores of iron. Localities, &c.—Found in veins in primitive moun¬ tains, and fometimes alfo in ftratiform mountains, ac¬ companied by brown and fparry iron ore. 10. Species. Argillaceous Iron Stone. This is divided into fix fubfpecies : 1. red chalk \ 2. columnar argillaceous iron ftone 5 3. granular 5 4. common ; 5. reniform j and, 6- pifilorm. Subfpecies 1. Red Chalk. Id. Broch. ii. 271. Exter. Char.—Maflive j fradlure flaty 5 luftre glim¬ mering $ crofs fradlure earthy, dull} fragments in plates, or fplintery. Colour brownilh red, black or blood red •, ftreak blood red j writes and Plains, foft j adheres to the tongue j feels meagre. Spec. grav. 3.13 to 3.93. Chem. Char.—Decrepitates, and becomes black when expofed to a red heat. Localities, &c.—Ufually accompanies clay flate, ei¬ ther in thin beds, or in maffes, as at Thalitter in Hef- fia, where it is dug out in confiderable quantity. It is alfo found in Bohemia and Saxony. JJfes.—Employed as crayons in drawing, and for this purpofe it is dug out, rather than as an ore of iron. Red chalk, on account of the quantity of alumina and other earths which it contains, w^as formerly arran¬ ged in the argillaceous genus. Subfpecics MINERALOGY. Part I. Subfpecies Id. Kirw. ii. 176. MINER 2. Columnar Iron Stone. Id. Broch. ii. 273. Exter. Char.—Found in angular or rounded pieces j furface rough and dull; fra&ure dull and earthy j com- pofed of columnar diftindl concretions, which are often a little curved, fometimes ftraight and artiqulated, and Very eafily feparated j furface of the concretions rough and dull. Colour cherry red, blood or brownilh red } {Ireak blood red, fometimes yellowilh brown 5 foft; adheres to the tongue ; feels meagre, and is a little rough. Localities, &.c»~—Ufually met with in beds of clay, in ftratitoim mountains, and particularly in the neigh¬ bourhood of fubtefranean fires, by the effefts of which, as it is fuppofed, it may have been produced. It is found in Bohemia and fome other places, where it is wrought as an ore of iron. Subfpecies 3. GRANULAR IRON STONE. Id. Broch. ii. 274. /Icinofe Iron Ore, Kirw. ii. 177. Exter. -Maffive, or couftituting the bafe of pe- tnfaftions j llrongly glimmering, or weakly fhining j frafture uneven, fometimes flatyj fragments blunt-edged. Colour reddifh and yellowilh brown, or grayilh black j ilreak blood red, or varying according to the colour of the ore, ufually foft, or femihard. Specific gravity 2.673. Conjlituent Parts. Lampadius. Oxide of iron 64. Alumina 23. Silica 7.5 Water 5. Lofs .5 100.0 A L O G Y. brittle ; adheres to the tongue j feels meagre, gravity 2.57. _ _ v Localities, &c.-—Found in Bohemia, Saxony, Silefia, and Poland, and in the coal countries of England and Scotland, and almoft always in clay beds, fometimes accompanied with bituminous wrood, in ftratiform moun¬ tains. This variety was formerly called cetites or eagle-Jlone, as it wras fuppofed that the eagle carried it to its neft. Subfpecies 6. Pisiform Iron Stone. Id. Kirw\ ii. 178. Id. Broch. ii. 280. r Exter. Char.-~-\n fpherical or flattened particles, which are generally fmall $ furface rough, dull; internal luftre glimmering or weakly fhining j frafture fmooth. Colour between brown and red; flreak yellowifh- brown j femihard 5 brittle. Spec. grav. 5.2. Conjlituent Parts. Vauquelin. Iron, 30 Oxygen, 18 Alumina, 31 Silica, 15 Water, 6 235 Specific Metallic Ores. IOO Localities, &c.—This variety is found in confiderablc beds in ftratiform mountains. It is abundant in France, Switzerland, and fome parts of Germany. 11. Species. Bog Iron Ore. This is divided into three fubfpecies : i.moraffyj 2. fwampy ; and 3. meadow. Subfpecies 1. Morassy Bog Iron Ore. Id. Kirw. ii. 183. Id. Broch. ii. 283. Localities, &c.—-Is found only in ftratiform moun¬ tains, as in Bohemia, Bavaria, and Switzerland. Subfpecies 4. Common Iron Stone. Id. Kirrv. ii. 173. Id. Broch. ii. 276. Exter. Char'.—Maffive or difteminated, fometimes cel¬ lular or botryoidalj dull j fradlure earthy j fragments rather (harp-edged. Colour yellowilh or bluifh gray ; yellowifh brown, or brownifh red j ftreak varies with the colour 5 foft j brit tle ; adheres to the tongue $ feels mepgre. Localities, &c.«—A common ore of iron in many places of Saxony and Bohemia, in Norway, and in England. It is connected with ftratiform mountains, alternating w ith beds of clay (late. Subfpecies 5. RenifoRm Iron Stone. Id. Broch. ii. 278. Nodular Iron Ore, Kirw. ii. 178. Exter. CAtfr.—Found in rounded or tuberculated pieces, of a kidney-form figure j furface rough, covered with earthy particles •, internal luftre glimmering j frac¬ ture fmooth, or earthy 5 fragments rather (harp-edged 5 compofed of lamellar and concentric diftinift concretions, including a nodule which is ufually moveable. Colour yellovvifh brown j flreak the fame j foft $ Exter. Char.—Sometimes earthy, fometimes in amor¬ phous, tuberculated, or corroded mafies ; fra&ure earthy. Colour yellowifh-brown ; ftains ; foft ; friable 3 feels meagre. Subfpecies 2. Swampy Iron Ore. Id. Kirw. ii. 183. Exter. Char.—In amorphous mafTes, which are tu- berofe or corroded 3 dull or (lightly ^Cmmering 3 frac¬ ture earthy ; fragments blunt-edged. Colour dark yellowifh-brown, blackifh-brown, or fteel-gray 3 ftreak light yellowifh-brovvn 3 very foft 3 brittle 3 heavier than the former. Subfpecies 3. Meadow Iron Ore. Id. Kirw. ii. 182. Id. Broch. r. 284. Exter. Char.—In kidney-form, tuberofe, often cor¬ roded mafles ; externally dull or rough ; internal luftre fhining, refinous; fra&ure conchoidal, or earthy when it is dull 5 fragments rather blunt-edged. Colour dark blackifh-brown, or yellowifh-brown 3 ftreak yellowifh-brown 3 foft and brittle. Conjhtuent Parts.—Bog iron ore is an oxide of iron, combined with the phofphate of iron, with fome earthy matters, as alumina and filica. G g 2 Localities. 236 Meta lie Ores. \ MINERALOGY. Part I. Localities, See.—Bog Iron ore is more abundant in tne northern than in the fouthern parts of Europe. It is not. uncommon in Poland, PruOia, Sweden, and in the Weftern iflands of Scotland, as Jura and May. It is fometimes found in extenfive beds, alternating with fa nd It one and clay. 12. Species. Blue Earthy Ore. Id. Broch.ii. 288. Blue Martial Earth, Kirw. ii. 185. Native Prujftate of Iron, of others. Exter. Char.—Ufually found {lightly cohering, or loofe, or friable ; particles dull j ftains, and feels meagre. Colour grayiiltwhite, indigo blue, rarely fmalt-blue. Chetn. Char.—Becomes reddilh-brown before the blow-pipe } melts into a black globule ; eafily foluble in acids. Conjlituent Parts.—It was fufpefted by Bergman, that this was a native Pruffian blue but according to Klaproth, it is compofed of iron and phpfphoric acid, with a mixture of alumina. Localities, &c.—Found in final! nefts in beds of clay, or bog iron ore, as in Saxony, Ruffia, and Siberia. 13. Species. Green Earthy Iron Ore. Green Martial Earth, Kirw. ii. 188. Exter. Char.—Found fiiable and fuperficial, rarely maffive 3 internally dull 3 fra£ture earthy. Colour yellowilh or olive-green , {tains ; foft 3 feels meagre. Chcm. Char.—Becomes red before the blow-pipe, and then dark-brown, but without fuiion. Conjlituent Parts.—It is conjectured to be a com¬ pound fimilar to the former, but in different proportions. Localities, &c.—Found in Saxony, in veins, and ac¬ companied with quartz and pyrites. 14. Species. Phosphate of Iron. Id. Jour, de Phyfique, Iviii. 259. Ann. de Chim. 1. 200. Exter. Char.—Found in rounded pieces, compofed of capillary cryltals, which {eem to be four-fided prifms 3 fradture radiated and divergent. Colour blue, from a blue powder coating the cry¬ ltals, which are otherwife colourlefs 3 femitranfparent. Spec. gray. 2.5 to 2.6. Conf ituent Parts. Cadet Laugier. Oxide of iron. 42.1 41 25 Phofphoric acid, 26.9 I9,z5 Silica, 3* 1*25 Alumina, 5-8 5. Lime, 9-1 - Water, 13-1 3I-25 Lofs, - 2. 100.0 100.00 Localities, &c.—This mineral is found imbedded in clay in the ifle of France, and in Brazil. 15. Species. Pitchy Iron Ore, or Phofphate of Iron and Manganefe. If. Broch. ii. 533. Jour, de Mines, N° 64. p. 295. Exter. Char.—Maflive 3 furface earthy and dull 3 Claffifica- internal luftre weakly thining, refinous 3 frafture com- i tlon- pafbor foliated. Colour dark reddiflt-browm, or black 3 opaque 3 fe~ mihard 3 brittle 3 lireak dark red. Spec grav. 3.956. Chcm. Char.—Melts before the blow'-pipe into a black enamel. Confituent Parts. Vauquelin. Oxide of iron, 31 Oxide of manganefe, 42 Phofphoric acid, 27 100 Localities, &c.—Found near Limoges. 16. Species. Cube Ore, or Arfeniate of Iron. Id. Phil. Tranf. 1801. p. 190. Exter. Char.—Found cryftallized in fmall cubes, grouped together in a druiy form 3 cryltals fometimes truncated on their angles 3 furface fmoothj {hining 3 lultre between refinous and adamantine 3 fradture con- choidal. Colour olive-green, yellow, or browm 3 tranflucent 3 femihard 3 powder yellow7. Spec. grav. 3. Chem. Char.—Before the blow-pipe froths up with the fmell of arfenic, and melts into a yellowilh-gray me¬ tallic globule. Confituent Parts. .Vauquelin. Chenevix. Oxide of iron, 48 45.5 Oxide of copper, — > 9. Arfenic acid, 18 31. Silica, — 4* Lime, 2 — Water, 32 10.5 100 100.0 Localities, &c.—Found in the copper mines in Corn¬ wall. 17. Species. Arseniate of Iron and Copper. Id. Phil. Tranf. 1801. p. 219. Exter. Char.—Cryftallized in four-fided rhomboidal prifms, with two edges very obtufe, and two very a- cute, terminated by an acute foqr-fided pyramid 3 edges of the prifm are fometimes truncated. Colour bluifh-wdfite 3 cryftals femitranfparent 3 femi- hard. Spec. grav. 3.4. Confituent Parts. Oxide of iron, . 27.5 Oxide of copper, 22.5 Arfenic acid, 33-5 Silica, 3’ Water, 3 2. Lofs, 1-5 1.00.0 Localitits, Part T. Clafilfka- Localities^ &c.—Found in Cornwall, in Siberia, and . t;»n- Spain. ' . 13. Species. Chromate of Iron. Id. Broch. ii. 534. Id. Hauy, iv. 129. Exter. Char.—Maflxve •, glimmering or weakly fhin- ing ; fra&ure compaft and uneven, or iraperfedlly fo¬ liated. Colour grayilh or blackifh brown •, opaque ] llreak afh-gray j fmell earthy when breathed on $ hard. Spec, grav. 4.032. Chem. Char.—Infufible before the blow-pipe ; melts with borax, and colours it of a beautiful green. Conjlituent Parts. Oxide of iron, 35 Chromic acid, 43 Alumina, 20 Silica, 2 , 100 Localities, &c.—Difcovered by Pontier in France, in the department of Var, and found in confiderable abundance in veins and nodules, in beds of ferpentine ; found alfo in Siberia. VII. LEAD Genus. 1. Species. Galena. 237 the others only glimmering; internal luflre glimmer- Metallic ing 5 fradlure even or conchoidal j fragments rather 0res• . fharp-edged. Colour lead or fteel-gray j flreak Ihining $ ftains j foft. Spec. gray. 7.44. Localities, &c.—This is a rare mineral. It is found along with common galena, in Saxony, and other parts of Germany ; in Derbyfhire, where it is known by the name of JlickenJide, and in the county of Dur¬ ham, where it is known by the name of looking-glafs ore. 2. Species. Blue Lead Ore. Id. Kirw. ii. 220. Id. Broch. ii. 203. Exter. Char.—Rarely maflive, mod commonly cry- ftallized in regular fix-fided prifms, which are often a little curved, and fometimes fafcicularly grouped j liir- face rough ; longitudinally ftreakedj lullre glimmering •, fraflure even. Colour between lead-gray and indigo blue •, opaque j ftreak Alining j foft; eafily frangible. Specihc gravity 5.46. Chem. Char.—Melts eafily before the blow-pipe ; burns with a bluifli flame, and a fulphureous odour, leaving a globule of lead. ^ Its conAituent parts have not been exaftly afcertain- ed. Suppofed to be a green lead ore, which has under¬ gone fome change, but retaining its original form. Localities, &c.—This ore has only been found in ■Saxony, and alio, it is faid, in France and Hungary. MINERALOGY. This is divided into two fubfpecies} common and compact galena. Subfpecies 1. Common Galena. Id. Kirw. ii. 216. Id. Broch. ii. 294. Plotnb Sulfure, Hauy, iii. 456. Exter. Char.—Maflive, difleminated, fuperficial, in imitative forms, or cryfiallized in cubes, o&ahedrons, fix-fided prifms, and fix-fided tables ; all which are varioufly modified by truncations and bevelments on the edges and angles. Cryfials grouped or imbedded j lurface fmooth, or drufy ; luAre from glimmering to refplendent j internal the lame ; fraflure foliated $ frag¬ ments cubic, excepting the fine-grained galena. Colour lead-gray, fometimes tarnifiied, or iridefcent; foft ; eafily frangible j Aains a little. Spec. grav. 7.22 to 7.58. Chem. Char.—Decrepitates before the blow-pipe, and fules, giving out a fulphureous odour. Conjlituent Parts.—Compofed of fulphur and lead in variable proportions, and generally a little filver, fome¬ times antimony. The proportion of lead is from 50 to 80 per cent. ' Localities, &c.—This is the mofi common ore of lead, and exifis in all kinds of rocks, either in beds or veins. In many countries this lead ore is dug out to a great extent, as in Germany, France, and Britain. Subfpecies 2. Compact Galena. Id. Kirw. ii. 218. Id. Broch. ii. 301. Exter. Char.—Maflive, dhT-minated, kidney-form, or fpecular j luflre of the fpecular variety refplendent 5 3. Species. Brown Lead Ore. Id. Kirw. ii. 222. Id. Broch. ii. 305. Exter. Char.—Rarely maffive, commonly cryfiallized' in equal fix-fided prifms, or the cryfials are acicular or capillary ; luftre glimmering ; internal fhining j frac¬ ture uneven. Colour reddifli or clove-brown j tranflucent at the edges; flreak white j foft j brittle. Spec. grav. 6.6 to 6.97. Chem. Char.—No effervefcence with acids j fufes readily before the blow-pipe, but is not reduced ; cry- fiallizes in fmall needles on cooling. Conjlituent Parts.. Klaproth. Oxide of lead, 7^-5^ Phofphoric acid, I9*73 Muriatic acid, 1.65 Lofs, .04 100.00 Localities, &c.—Found along with white lead ore, quartz, and heavy fpar, in France and Germany. 4. Species. Black Lead Ore. Id. Kirw. ii. 221. Id. Broch. ii. 307. Exter. Char.—Maffive, difleminated, cellular, but moft frequently cryflallized in fix-fided prifms, with equal or unequal fides, or bevelled at the extremity. Cryfials fmall, irregularly grouped 5 fmooth, and iome- times longitudinally flreaked } lufire Alining j frafture uneven. Colour MINERALOGY. Part I. Colour grayJili black ; opaque ; ftreak grayifh black j foft; brittle. Spec. grav. 5.^. Chem. Char.—Decrepitates before the blow-pipe 5 and is then reduced to the metallic date. Conjiituent Paris. Oxide of lead, Carbonic acid, Carbone, * Water, Lampadius. 18. i-5 2. 100.0 Localities, &.c.—Found irt Saxony, England, and Scotland, frequently accompanying white lead ore. 5. Species. White Lead Ore, or Carbonate of Lead. Id. Kirw. ii. 203. Id. Broch. ii. 309. Plomb Car¬ bonate, Haiiy, iii. 475. Cent, or only at the edges ; dreak greenifh white j Claffifka* brittle. Spec. grav. 6.909 to 6.941. tlon- Client. Cliar.-—-^\\e\ts ealily before the blow-pipe, into v a grayilh polyhedral globule, but without being redu¬ ced ; folublc in acids, without effervefcence, but fome- tirties with difficulty. Conjiituent Parft. Oxide of lead Phofphoric acid Muriatic acid Oxide of iron Lofs 77.10 19. I-54 .10 2.26 100.00 Klaproth. 80. 18. 1.62 ^•38 100.00 Localities, &c.-—-Found in veins along with other lead ores, and generally near the top of the vein, in Germany, France, and Leadhills in Scotland* Exter. Char.—Rarely maffive, commonly diflemi* nated, fuperficial, or cryftallized in fix-fided prifms ; in four-fided prifms j in double cryilals, compofed of two four-fided prifms j in oblique four-fided prifms, and in double fix-fided pyramids, Thefe are varioufly modi¬ fied by truncations and acuminatmns on the edges and angles.' They are alfo of various fizes, and varioufly grouped together .* furface ufually fmooth, refplendent, fometimes rough or ftreaked; luftre fliining, adaman¬ tine j fragments conchoidal, fplintery, or fibrous. Colour white, yellowifh, or grayifh rvhite *, tranfpa- rent or tranflucent; refraflion douole. Specific gravity 6.48 to 7.23. Chem. -Decrepitates before the blow-pipe, be¬ comes yellowifh or reddifh, and melts into a metallic globule j efferrefces flrongly with acids. 7. Species. Red Lead Ore, or Chromate of Lead. Id. Broch. ii. 318. Led Lead Soar, Kirw. ii. 214. Etxter. Char.—Rarely maffive, fometimes diffcminated or fuperficial, but rnoft frequently cryftallized in oblique four-fided priftns with the extremity bevelled, or the lateral edges truncated 5 and in fix-fided prifms, with two broad and two narrow faces lateral faces longitu¬ dinally ftreaked j external furface fmooth, fliining j fracture even. Colour aurora red, or hyacinth red ; tranflucent or femitranfparent; ftreak orange yellow 5 foft 5 brittles Spec. grav. 5.75 to 6.02. Chevi. Ofor.-—No effervefcence with acids ; decrepi¬ tates a little before the blow-pipe, and melts into a black flag. Conjiituent Parts. Klaproth. Macquart. Oxide of lead 82 713 Carbonic acid 16 24 Water 2 3 100 100 Some carbonates of lead are alfo combined with a Tmall portion of iron and earthy matters. Localities, &c,—^Found in veins, accompanied by galena and other lead ores, in Germany, France, and Britain. 6. Species. GreEx Lead OrE, or Phofphnte of Lead. Plomb Phofphate, Hauy, iii. 490. Id. Broch. ii. 314. Phofphorated Lead Ore, Kirw. ii. 207. Exter. C/wr -—Maffive or difleminated, botryoidal or reniform, and often cryftallized in fixdided prifms, trun¬ cated on all the edges, or on the terminal edges, or terminated by a fix-fided pyramid $ in fix-fided prifms with the lateral faces converging towards one of the ex- tremities ; and in fix-fided pyramids \ but this laft is rare. Surface fmooth, fhinino' internal luftre weakly flf ning and fdinous $ fraibu-; ■ even. Colour olive green, emerald cen. yellow or brown ; • - ? , greemfn, or yellow?ft- white $ tranflu- a Conjiituent Parts. Vauquelin. Oxide of lead 64 Chromic acid 36 100 Localities, &c.—Found in veins at Berefof in Sibe¬ ria, accompanied by other ores of lead, fome ores of iron, and native gold. A fimilar ore of lead, but of a brown colour, was brought from Mexico by Humboldt. 8. Species. Yellow Lead Ore, or Molybdate of Lead. Id. Rroch. ii. 322. Yellow Lead Spar, Kirw. ii. 212. Hairy, iii. 498. Exter. Char.—Rarely maffive, ufually cryftallized in rectangular four-fided tables ; in perfeft cubes, with plane or convex faces, or truncated on the terminal edges ; In four-fided tables bevelled on the terminal faces; in obtufe octahedrons, truncated on the fummit, the lateral angles, or lateral edges. Cryftals fmall j furface fmooth and fhining j internally fhining; luftre waxy frafture conchoidal. C •!;>u wax yellow, or honey yellow j tranflucent, or only at the edges j loft $ brittle. Spec. grav. 5.48 t0'5'7 Chem. Fart I. MINERALOGY. Claffifica- tion. Chem. (j/uir.—Before the blow-pipe it decrepitates- ftrongly, and then melts into a blackiih-gray globule, in which are feen particles of lead. Soluble in nitric acid, and in fixed alkalies. Conjlituent Parts. a mixture of oxide of lead, with a little oxide of iron, and fome earthy matters. Localities, &c.—Found on the furface, or in the ca¬ vities of other lead ores, in Saxony, France, Siberia, and at Leadhills and Wanlockhead in Scotland. 239 Metallic Ore?. Oxide of lead Molybdic acid Oxide of iron Silica Carbonate of lime Lofs Macquart. 63-5 28. ' 4* 4* 5 100.0 Hatchett. 58.4 38. 2.1 .28 1.22 100.00 Localities, &c.—This ore of lead was firft difcovered at Bleyberg in Carinthia j it has been fince found in Sax»ny and France. 11. Species. Muriate of Lead. Exter. Char.—Maffive, or cryftallized in cubes, or flat fix-lided prifms j external furface fhining j internal luftre refplendent, adamantine ; frafture foliated. Colour between afparagus green and wine yellow j femitranfparent j foft; not brittle j ftreak dull, white. Conjhtuent Parts. Klaproth. Oxide of lead Muriatic acid 45 100 9. Species. Native Sulphate of Lead. Id. Kirw. ii. 211. Broch. ii. 325. Hauy, iii. 503-. Exter. Char.—Cryfiallized in irregular octahedrons, which are varioutly truncated and bevelled. Cryftals fmooth and fhining ; luflre finning hnd vitreous 5 frac¬ ture compact. Colour fnow white, grayifh or yellowifh white j tranflucent j femihard. Spec. grav. 6.3. Chem. Char.—Reduced even in the flame of a candle j infoluble in nitric acid. Conjlituent Parts. Klaproth. Oxide of lead 7° j Sulphuric acid 25'7S~ Water 2.25 Lofs 1.5 100.00 Localities, &c.—Found on brown iron ore in the ifland of Anglefea, and on galena in the veins at Lead- hills and Wanlockhead in Scotland. 10. Species. Earthy Lead Ore. Id. Broch. ii. 327. Id. Kirwan, ii. 105. This is divided into two fubfpecies : 1. friable j and, 2. indurated. Subfpecies 1. Friable Lead Ore. Exter} Char.—This is compofed of fine earthy parti¬ cles, which are dull, and have little coherence. Colour fulphur or ochre yellow, yellowifh or fmoke gray j flams ; feels meagre. Subfpecies 2. Indurated Lead Ore. Exter. Char.—Maflive or dilfeminated } dull j frac¬ ture uneven or earthy. Colour of the former; opaque } ftreak lighter colour j very foft and friable. Chem. Char.—Eafily reduced before the blow-pipe, into a black flag j effervefces a little with acids. ConJUtuent Parir,-—Earthy lead ore is fuppofed to be Localities, &c—Found in Derbyfliire, and alfo, it is faid, in the mountains of Bavaria, but not cryftal¬ lized. 12. Species. Murio-Carbonate of Lead. Id. Bournon and Chenevix, Nich. Jour. 4to. p. 219. Exter. Char.—Gryftallized in cubes, which are va- rioufly modified ; luftre ihining, adamantine ; fratturc foliated j crofs frafture conchoidal. Colour ftraw yellow, or clear white 5 femitranfpa- rent; ftreak dull, fnow white ; eafily fcratched by car¬ bonate of lead. Spec. grav. 6.065. Conjhtuent Parts. Chenevix. Muriatic^ acid } Muriate of lead 59 Oxide of lead 14.1 ^ , r . , Carbonic acid 6 $Carbonate of lead 4° Lofs i i 100 IO0 Localities, &c.—Found in Derbyfhire. 13. Species. Arseniate of Lead. Id7 Broch. ii. 546. Exter. Char.—Difleminated, fometimes in an earthy flate, fometimes in filky filaments, and cryftallized in fmall, double, fix-fided pyramids. Dull, or weakly glimmering •, luftre filky. Colour citron or greenifh yellow j very {oft; friable. Chem. Char.—Before the blow-pipe it melts eafily into a globule of lead, and gives out the fmell of garlic. Conjl. Parts.—Compofed of oxide of lead and of ar- ienic, with fome oxide of iron and earthy matters. VIII. TIN Genus. 1. Species. Tin Pyrites. Id. Kirw. ii. 200. Id. Broch. ii. 332. Exter. CV/tfr.—Found maflive or diffeminated j luftre fhining. 2.j-0 Metallic Ores. M I N E R A fliining or weakly fhming j fraclure uneven j fragments rather blunt-edged. Colour fteel gray, fometimes brafs or bronze yellow } femihard 5 brittle. Spec. grav. 4.3 to 4.7. Chem. Char Before the blow-pipe it melts ealily in¬ to a black flag, but without being reduced, and gives cut a fulphureous fmell. Conjlituent Parts. Tin Copper Iron Sulphur Earthy fubflances Klaproth. 34 36 3 25 2 100 Localities, &c.-—This is a rare mineral, found only in Cornwall, in a vein along with copper pyrites. 2. Species. COMMON Tinstone, or Oxide of Tin. Id. Kirw. ii. 197. Id. Broch. ii. 334. Hatiy, iv. 137. Exter. Char.—Maflive, diffeminated, in rounded pieces or grains, and often cryllallized in redlangular four-fided prifms, which are varioufly modified by trun¬ cations and bevelments •, in o&ahedrons, which are rare ; in eight-fided prifms, or in double oftahedrons, which are fb united by one of their fummits as to form a re-entering angle. Cryftals of various fizes, always grouped together ; furface fmooth 5 lull re (hining or re¬ splendent •, internal luttre fhining, between vitreous and refinous •, fradlure uneven. Colour brovvnifii black, blackifh brown, yellowifh gray, or grayilh white ; opaque, or femitranfparent j flreak light gray 5 hard j brittle. Specific gravity 6.3 to 6.9. Chem. Char.—Before the blow-pipe it decrepitates, lofes its colour, and is partially reduced to the metallic Hate. Confitucnt Parts. Tin Iron Oxygen Silica Klaproth. 77‘5 •25 21.5 •75 100.00 in Germany, in the Eaft Cornwall in England. It LOGY. Chetn. Char.—Becomes brownilh red before the blow¬ pipe, then decrepitates ftrongly, but is infuiible. Part T. Localities, &c.—Found Indies, and particularly in is not very univerfally diftributed $ but where it exifls, it is depofited in granite, gneifs, micaceous fchiftas, and porphyry ; and either in maffes, veins, or diffeminated in the rocks. 3. Species. Grained Tin Ore, or Wood Tin. Id. Broch. ii. 340. Id. Kirw. ii. 298. Exter. Char.—Found only in fmall pieces, rounded or angular ; furface rough j w'eakly {hining ; internal luftre glimmering j a little filky j fra£!ure fibrous j fragments wedge-ihaped. Colour hair brown of various {hades 5 flreak yellow¬ ifh gray 5 hard and brittle. Spec. grav. 5.8 to 6.4. Conjl. Parts.—According to Klaproth, it is compo- fed of 63 of tin in the 100, with a little iron and arfenic. Localities, See.—Found in Cornwall, in alluvial land, where it feems to have been depofited in a flaladlitical form, accompanied by common tin. • IX. BISMUTH Genus. 1. Species. Native Bismuth. Id. Kirw. ii. 264. Id. Broch. ii. 343. Id. Hauy, iv. 184. Exter. Char.—Rarely maflive, but ufually diffemina¬ ted in a plumofe or reticulated form, and rarely cryffal- lized, in fmall four-fided tables or cubes j luftre Ihin- ing or refplendent j frafture foliated. Colour filvery white, inclining to red •, colours com¬ monly tarnifhed ; foft $ almoft dudtile. Specific gravity 9.02 to 9.82. Chem. Char.—Fufible almofl: in the flame of a candle ; by increafing the heat it is volatilized $ foluble with effervefcence in nitric acid, and precipitated by water in the form of a white powder. Localities, &c.—Bifmuth is a rare metal, found in veins in primitive mountains, accompanied by calcare¬ ous fpar, heavy fpar, and quartz, and commonly with gray cobalt, fometimes alio with black blende and na¬ tive filver. Found in Saxony, Bohemia, France, and Sweden. 2. Species. Vitreous Bismuth Ore. Sulphurated Bifmuth, Kirwan, ii. 266. Id. Brochant, ii. 346. Exter. Char.—Maflive or diffeminated, rarely cryf- talhzed in fmall imbedded capillary prifms j luftre fhin¬ ing or refplendent j fraffure radiated or foliated. Colour between lead gray and tin white j ftains a little j foft eafily frangible. Specific gravity 6.13 to 6.46. ^ Chem. Char.—Eafily fufible before the blow-pipe, with a fulphureous odour. Conf. Parts.—Compofed of bifmuth about 60 per cent, and fulphur with a little iron. Localities, &.c.—Found in Bohemia, Saxony and Sweden, and is ufually accompanied by native bif¬ muth. 3. Species. Ochre of Bismuth. Id. Kirwan, ii. 265. Id. Brochant, ii. 348. Exter. Char.—Rarely maflive, commonly diffeminat¬ ed on the furface of other minerals} internally glim¬ mering *, fraflure uneven or earthy. Colour yellowilh gray, alh gray, or ftraw yellow, opaque; foft ; fometimes even friable. Spec. grav. 4.37. Chem. Char.—Very eafily reduced before the blow¬ pipe to the metallic ftate ; effervefees with acids. Conflituent 3 Part 1. MINERALOGY. 241 Conjlituent Parts. Lampadius. Oxide of bifmuth — iron Carbonic acid Water Lofs 86.3 J-2 4.1 3-4 1. 100.0 Localities, &c.—This mineral is very rare, and chief¬ ly found near Schneeberg in Saxony, along with native bifmuth j and alfo in Bohemia and Suabia. ‘ X. ZINC Genus. 1. Species. Blende. Id. Brochant, ii. 350. Id. Kirwan, ii. 237. Zinc Sulfure, Hauy, iv. 167. This fpecies is divided into three fubfpeciesj yellow, brown, and black. Subfpecies 1. Yellow Blende. Exter Char.—Maffive or diffeminated, or fometimes eryftallized in cubes or o£tahedrons, but they are fo confufed as to prevent the form being eafily difcovered. Surface fmooth, refplendent j internal ludre refplen- dent, between adamantine and vitreous't fradture fo¬ liated 5 cleavage fix-fold $ fragments rather (harp edged, or aflume fometimes a dodecahedral form, which is the refult of the complete cleavage. Colour dark fulphur yellow, olive green, or brown- ifli red ; tranllucent, fometimes femitranfparent j ftreak yellowilh gray j femi-hard 5 brittle. Spec. grav. 4.04 to 4.16. them. Char.—Decrepitates before the blow'-pipe, and becomes gray, but is infufible. parent j ftreak yellowiih gray; femi-hard; brittle. Metallic Spec. grav. 4. uJSl ConJHtuent Parts. Zinc Sulphur Iron Silica Alumina Water Bergman. 44 17 5 24 5 5 100 Localities, Sic.—Very common in veins of lead ore, in moft parts of the world. Subfpecies 3. Black Blende. Exter. Char.—Maffive, or diffeminated, or cryftal- lized like the former, which it refembles in moft of its charadlers. Colour perfedl black, brownifti black, or blood red ; often iridefcent. Conjlituent Parts. Bergman. Zinc Sulphur Iron Lead Silica Water Arfenic 45 29 9 6 4 6 100 Localities, &c.—Found in the fame places with the former. 2. Species. Calamine. ConJUtuent Parts. Bergman. Zinc 64 Sulphur 20 Iron . _ 5 Fluoric acid 4 Water 6 Silica 1 I0O PInjsical Char.—Moft of the varieties of yellow blende become phofphorefcent by friction in the dark. Localities, &c.—Found in Saxony, Bohemia, Hun- garv and Norway,' accompanied by lead, copper, and iron ores. It is rather a rare mineral. Subfpecies 2. Brown Blende. Exter. Char.—Maflive, diffeminated, and fom'etimes cryftallized in fimple three-fided pyramids, oftahedrons, and four-fided prifms, which are varioufty modified. External luttre thining or refplendent ; furface fome¬ times drufy j internal luftre (hining, between vitreous and refinous *, fra6ture foliated j cleavage fix-fold. Colour reddifti, or yellowith brown j colour fome¬ times tarniftied ; tranflucent, or opaque j cryftals tranf- Vol. XIV. Part T, This is divided into two fubfpecies, compaft and fo« liated. Subfpecies 1. Compact Calamine. Id. Kirwart, ii. 234. Id. Brochant, ii. 36li Exter. Char.—Maflxve or diffeminated, cellular, or ftaladtitical ; dull j fradlure compadl or earthy. Colour grayith white, yellowith, or reddifti, or milk white } opaque j femi-hard or friable j brittle j ftains fometimes. Spec. grav. 3.52, to 4.1. Chem. Char.—Decrepitates before the blow-pipe when luddenly heated j is infufible. Forms a jelly with acids, and fometimes effervefces. Oxide of zinc Silica Iron Alumina Water Lofs ConJUtuent Parts. Bergman. 84 12 3 100 H h Tennant. 68.3 25* 4.4 2-3 100.0 Oxide 242 M I N E R A L O G Y. Part L Tennant. 64.8 65.2 35-2 34-8 100.0 100.0 Another variety examined by the fame cherniil con¬ tained, Oxide of zinc 7I,4 Carbonic acid 13.5 Water 15.1 100.0 From thefe analyfes it appears, that calamines are very different in their compofltion, confiding fometimes of oxide of zinc, filica, and water, and this variety forms a jelly with acids ; others are compofed of car¬ bonic acid and oxide of zinc, which effervefce in ful- phuric acid, but do not form a jelly •, a third variety is compofed of cxide of zinc, carbonic acid, and water, «onftituting a hydro-carbonate of zinc, which is foluble with effervefcence in fulphuric acid. Localities, &e.— Ufually accompanied with iron ©chre, and very often with galena, white lead, and other metallic ores. Found in Bohemia, Bavaria, France, and Britain, in feme places in confiderable a- bundance. * Subfpecies 2. Foliated Calamine. Jd. Brochant, ii. 364. Kinvan, ii. 236. Hauy, xv. 161. Exter. Char.—Found maflive or diffeminated, ffa- Tattitical, incrufttd, or cryftaliized, in fmall four-fided tables, or in very fmall cubes with plane or convex faces, (hining, or glimmering ) luftre between pearly and vitreous •, fradlure radiated. Colour yellowitb, or fmoke gray j grayifli, or yel- lowilh white j tranflucent or femitranfparent y femi- hard ; brittle. Specific gravity 3.52. Chem. Char.—Becomes white before the blow-pipe, but is infufibie, and does not effervefee with acids. Phijf. Char.—Becomes eleftric by heat. Localities, &c.—This variety accompanies the for¬ mer, lining its cavities, but is lefs common. It is found in the fame places. XL ANTIMONY Genus. I. Species. Native Antimony. Id. Brochant, ii. 3^9- Kirwan, 13. 245* Id. Hauy, W. 25 2. Exter. Char.—Found maflive, diffeminated, or reni- form ; refplendent •, fradlure foliated. Colour tin white *, but expofed to the air, giayiih or yellowilh j foft; eafily frangible. Spec. grav. 6.7. Chem. Char.—Before the blow-pipe it is very eafily fufible into a metallic globule, which gives out fumes with the odour of garlic. Conjl. Parts.—Native antimony fometimes contains a fmall proportion of arfenic. Localities, &c.—Has only been found in two places: at Sahlberg in Sweden, where it was difeovered in Metallic Ores. Oxide of zinc Carbonic acid 1748, in limeffone ; and at Allemont in France, where Clafiifica. it is accompanied by other ores of antimony and co- jj00, bait. ^-—v—•— 2. Species. Gray Ore of Antimony. Id. Brochant, ii. 371. Kirwan, li. 246. Hauy, iv. 64. This is divided into four fubfpecies ; ccmpadd, fo¬ liated, radiated, and plumofe. Subfpecies 1. Compact Gray Ore of Antimony. Exter. Char.-—Maffive or diffeminated j {hining j fradlure uneven. Colour lead gray, or fteel gray ; foft •, not very brittle j ftains a little j ftreak {hining. Spec. grav. 4-36- Localities, Sac.—Ihis variety is rarer than the others, but is met with in Saxony, Hungary, and France. Subfpecies 2. Foliated Ore of Antimony. Exter. Char.—Maflive or diffeminated •, fracture fo¬ liated. In other characters it referable? the other va*- rieties, and is ufually accompanied by the following. Subfpecies 3. Rajhated Ore of Antimony. Exter. Char.—Maflive, diffeminated, and very often cryitallized in acicular, often in capillary cryltals, and in fix and four-fided prifms varioufly modified ; furface Itreaked longitudinally $ internal luffre refplendent j frafture radiated, ftraight, parallel, or divergent. Colour fimihr to the preceding ; foft j not very brittle. Spec. grav. 4.1 to 4.5. Confiituent Parts. Bergman. Antimony 74* Sulphur 26 100 Localities, &c.—This is the mofi: common ore of an¬ timony, and is found in Germany, France, and Swe¬ den. There is only one mine of antimony in Britain, which is in the fouth of Scotland, near Weflerhall, in the neighbourhood of Langholm. Subfpecies 4. Plumose Ore of Antimony. Exter. Char.—Ufually found in capillary cryflals, fo interwoven, that they form a fuperficial covering to other minerals : theie groups are externally weakly {hining ; internal luftre glimmering •, fradlure fibrous. Colour fimilar to the former, and fometimes tarnifh- ed brown or like tempered fteel; opaque j foft j fome¬ times almoft friable } brittle. Cofi/l. Parts.—Plumofe antimony is compofed of ful- phuret of antimony combined with arfenic, iron, and accidentally a little filver. Chem. Char.—Before the blow-pipe this and the other varieties of gray antimony give out white fumes, with a fulphureous fmell, and are almoit entirely vola¬ tilized, or changed into a black flag. Localities, &c.—Plumofe antimony is found at Freyberg in Saxony, in the Hartz, and in Hungary. 3. Species. * Part I. MINER 3. Species. Black Ore of Antimony. Exter. Char.—Found cryftallized in reftangular four- fided tables, truncated on the edges or angles $ cryftals fmooth ; luftre ihining ; fradture conchoidal. Colour iron black ; foftt Localities, &c.—This fpecies, which is alfo a fulphu- ret of antimony, combined probably with fome other ingredients, is found in Cornwall. 4. Species. Red Ore of Antimony. Id. Kirwan,]}. 250. Id. Brochant, ii. 279, Antimoine Hydrofulfurt, iv. 276. Exter. Char.—MalTive or diffeminated, but tnoft commonly in capillary cryftals j lultre weakly Ihining, vitreous $ fradfure fibrous. Colour cherry red, brown, reddilh, or bluifh ; foft, almoft friable ; brittle. Specific gravity 3.7 to 4. Chem. Char.—Before the blow-pipe it melts eafily, and in nitric acid a white powder is depofited. ConJIituent Parts. Klaproth. Oxide of antimony 78.3 Sulphur 10,7 Lofs 2. 100.0 Localities, &c.—Found in Saxony and France, ufu- sllv accompanying gray or native antimony. 5. Species. White Ore of Antimony. Muriated Antimony, Kirwan, ii. 151. Antimoine Oxide, Hauy, iv. 273. _ Exter. Char.—Rarely maffire, ufually fuperficial, in divergent fibres, or cryftallized in redtangular four- fided tables, cubes, or four-fided prifms. Cryftals ag¬ gregated 5 fmootb ; ftreaked longitudinally ; refplen- dent ; internal luftre (Lining, between adamantine and pearly j fradlure foliated. Colour fnow' white, yellowifh white, or grayiih j Iran (lucent ; foft •, brittle. < Chem. Char.—Cryftals decrepitate before the blow¬ pipe, but in powder is eafily fufible. Conjl. Parts.—Was formerly fuppofed to be a mu¬ riate of^ antimony, but according to Klaproth, it is a pure oxide. The white ore of France, according to Vauquelin, contains, Oxide of antimony lead Silica Lofs 6. Species. Ochre of Antimony. Id. Brochant, ii. 383. Id. Kirwan, ii. 252. Exter. Char.—Maflive, diflcminated, or in fuperfi¬ cial crufts, on gray antimony ; dull ; fraflure earthy. Colour draw yellow, or yellowifti gray ; foft ; friable. Chem. Char.—Infufible before the blow-pipe ; be¬ comes white, and emits white fumes. Its condiments are unknown. Localities, &c—In Saxony and Hungary, accom¬ panying g-iv and red antim ny, and in the antimony mine near Wefterhall, in the fouth of Scotland. 86 3 8 3 100 A L O G Y. XII. COBALT Genl4» 1. Species. White Cobalt Ore. Id. Kirw. ii. 382. Id. Broch. ii. 386. Exter. Char—Maflive, diffeminated, reniform, and rarely cryitallized in fmall four-fided tables, or in fmall cubes or odahedrons. Luftre weakly (Lining, or (Lin¬ ing j fra&ure uneven. Colour tin wdfite, but on the furface variable, and tarniftred ; ftreak (Lining ; hard j brittle. Chem. Char.—Eafily fufible before the blow-pipe, emitting a denfe vapour, with a linell of arfenic, and leaves a white metallic globule) colours borax blue. Localities, &c.—Found in Norway, Sweden, and Saxony, in beds of micaceous fchiftus, along with red cobalt ore, quartz, and hornblende. Its compofition is not known, but fuppofed to be alloyed with fome other metals. 2. Species. Gray Cobalt Ore. Id. Kirw. if. 271. Id. Broch. ii. 388. Exter. char .-—Maflive, diiTeminated, reniform, and and botryoidal j luftre (Lining ; fra&ure even. Colour light fteel gray, or tin w hite j furface fteel tarnifired j ftreak (Lining 5 femi-hard j brittle. Chem. Char.—Infufible before the blow-pipe j emit* ting fumes and the fmell of arfenic. ConJIituent Parts. Klaproth, Cobalt 20 Arfenic 3 3 Iron 24 Lofs 2 2 100 It contains alfo fometimes nickel and filver. Localities, &c.—Found in Saxony, France, Norway and Cornwall in England, with other ores of cobalt. * 3. Species. Shining Cobalt Ore. Id. Broch. ii. 390. Kirw. ii. 273. Exter. Char.—Maflive, difleminated, fuperficial, in various imitative forms, and cryftallized in cubes ’and oftahedrons, wTich are varioufly modified $ cryftals fmall, fmooth, and refplendent, rarely drufy; luftre fhining ; frafture uneven, radiated, or fibrous. Colour tin white, commonly grayiih, or yellowifti tarniftied } hard 5 brittle. Spec. grav. 6.3 to 6.4 Chem. Char.—Before the blow-pipe it burns with a fmall white flame, and a white vapour, fmelling ftrong- ly of garlic j then blackens, and is almoft infufible: foluble in nitric acid. ^ ConJIituent Parts of cryftallized (Lining cobalt from Klaproth. Taffkert. 44* 36.66 55*5 49- 5 6.5 5.66 2.18 100.0 100.00 H h 2 Localities, j-unaoerg in owTefler Cobalt Arfenic Sulphur Iron Lofs 2-l3 Metallic Ores. v 244 -Metallic Localities, &c*—This is the moft common ore of , °res' , cobalt; and it is ufually accompanied by the other ’ ~ ores, and fometimes alfo by vitreous, red, and native filver. It is found in Bohemia, Saxony, Sweden, and Cornwall in England, and ufually in beds in primitive mountains. Ufes.—This ore of cobalt is commonly wrought for the purpofe of employing it in the preparation of the fine blue colour known by the name of /malt, which is ufed in the manufa&ure of porcelain, glafs, and as a pigment. 4. Species. Black Cobalt Ochre. Id. Broch. ii. 396. Kirw. ii. 275. Hauy, iv. 2x4. This is divided into ttvo fubfpecies, friable and indu¬ rated. Subfpecies 1. Friable Cobalt Ochre. Exter. Char.—Compofed of particles which are more or lefs cohering •, ftains a little. Colour brownilh, bluilh, or grayilh black •, ftreak fhining ; feels meagre. In other characters it agrees with the following. Subfpecies 2. Indurated Cobalt Ochre. Exter. Char.—Maflive, difleminated, in imitative forms, or marked with impreflions $ dull, or weakly glimmering ; fraCture earthy. Colour bluilh black ; itreak fhining, refinous; foft $ femi-hard ; rather brittle. Spec. grav. 2.01 to 2.42. Chem. Char.—Before the blow-pipe it gives out an arfenical odour, but is infufible. Its conftituent parts are fuppofed to be oxide of co¬ balt, with fome iron and arfenic. Localities, &c.—Both varieties are found together, and accompanied by ores of filver, copper, iron, in Saxony, Suabia, and the Tyrol, as well as in France and Spain. 5. Species. Brown Cobalt Ochre. Id. Broch. ii. 400. Exter. Char.—Maflive, or difleminated j always dull j fraClure earthy j ftreak fhining, refinous. Colour light or dark liver brown j foft, almoft fri¬ able ; very eafily frangible. Conjlituent Parts.—Suppofed be compofed of oxide of cobalt, and iron. * Localities, &c.—Found at Saalfeld in Thuringia, in ftratiform mountains, and in Wirtemberg, in pri¬ mitive mountains, accompanied by other varieties of cobalt ochre. 6. Species. Yellow Cobalt Ochre. Id. Kirw. ii. 277. Broch. ii. 401. Exter. Char.—Maflive, or difleminated, or adhering to the lurfaces of other minerals j dull $ frafture earthy j ftreak fhining, refinous. Colour dirty ftraw yellow, or ycllowifh gray ; very foft or friable. Chem. Char.—Before the blow-pipe it gives out an cdour of arfenic, asd is infufible. Part I. Its conftituents are fuppofed to be oxide of cobalt, ClafilficA- and a little arfenic. tlon~ ^ Localities, &c.—Found in the fame places with the v~ former, but is rare. 7. Species. Red Cobalt Ochre, or Arfeniate of Co. halt. Id. Kirw. ii. 278. Broch. ii. Cobalt Arfeniate, Hauy, iv. 216. This is divided into two fubfpecies 5 earthy and ra¬ diated. Subfpecies 1. Earthy Red Cobalt Ochre. Exter. Char.—In thin fuperficial layers, or crufts j dull, or weakly glimmering j frafture earthy. Colour peach-bloflbm red, rofe red, or reddifh white \ ftreak a little finning 5 very foft, friable. Localities, &c.—Found in Bohemia, Saxony, France, and Norway. Subfpecies 2. Radiated Red Cobalt Ochre, or Cobalt Bloom, ox'Elowers of Cobalt. Exter. Char.—Maflive, or difleminated, rarely botry- oidal or reniform j often fuperficial, and in fmall dru- fy cryftals, whofe forms are rectangular four-fided ta¬ bles, four-fided prifms, double fix-fided pyramids, with different modifications. Cryftals fmall and varioufly aggregated 5 fmooth and fhining, fometimes refplen- dent j fraCture radiated $ fragments wedge-fhaped, or fplintery. Colour peach bloflbm red, crimfon red, or, expofed to the air, brownifh, grayifh, or whitifh j tranflucent y cryftals femitranfparent j foft ; brittle. Chem. Char.—Before the blow-pipe becomes black- ifh gray, giving out a feeble odour of arfenic, with¬ out any fumes, but is infufible. Colours borax a fine blue. This fpecies has not been particularly analyzed, but is confidered as a compound of cobalt and arfe¬ nic acid. Localities, &c.—The fame as the former, and alfo in Cornwall in England, and along with copper ores at Alva in Scotland. 8. Species. Sulphate of Cobalt. A faline fubftance in a ftalaftitical form, of a pale rofe red colour and tranflucent, is found at Herrengrund near Newfohl in Hungary, which wTas at firfl fuppofed to be a fulphate of manganefe, and afterwards a ful- phate of cobalt. This fubftance has been examined by Klaproth, who diflblved it in water, added an alkali, and obtained a bluifti precipitate, which coloured borax of a beauti¬ ful fapphire bluej and with muriatic acid he obtained from it a fympathetic ink. XIII. NICKEL Genus. 1. Species. Copper-coloured Nickel. Id. Brochant, ii. 408. Sulphurated Nickel, Kirw. ii. 286. Nickel Arfenical, Hauy, iii. 518. Kupfer. nickel of the Germans. Exter. CW.—Maffive or diffemmated, rarely reticu¬ lated MINERALOGY. Part I. Claflifica- lated 5 ftiining, or weakly Huning fradure uneven, tion. fometimes conchoidal j fragments rather fharp-edged. _ * v Colour pale copper red, whitifh, or grayilh j femi- hard ; brittle. Spec. grav. 6.64 to 7.56. . Chem. Char.—Before the blow-pipe it gives out the fumes and odour of arfenic ; melts with difficulty into a flag, mixed with metallic particles. Solution in acids, green. ConJJituent Parts. Sage. MINERALOGY. 245 Colour fleel gray, or iron black j ftreak black, with- Metallic r r > Specific gravity q.7 c rrs . Nickel Arfenic Sulphur Lofs 75 22 2 1 out luftre ; ftains j foft J brittle, to 4.7. Conjlituent Parts. Cordier and Beaunier *. From France, Oxide of manganefe, 83.5 Brown oxide of iron 2. Carbone — Carbonate of lime — Barytes 1*5 SiHca 7*5 Lofs 5 -5 100.0 Germany, 82. 7-5 3- 7- •5 190.0 * 'Jour, des Mines, Piedmont. No. Iviii. 86. P- 77s- 3- •* i-S 5- 4-5 100.0 100 Localities, &c.—Found in veins, in primitive and ftratiform mountains, almoft always accompanied with ores of cobalt, and often with rich filver ores. It is found in Bohemia, Saxony, France, Spain, and Corn¬ wall in England. Of purer fpecimens by Klaproth. Oxide of manganefe 99-25 92,75 Water *25 7* Lofs *5 *25 100.00 100.00 2. Species. Nickel Ochre, or Oxide of Nickel. Id. Kirw. ii. 283. Broch. ii. 411. Haiiy, iii. 516. Exter. Char.—Ufually diffeminated and efflorefcent on other minerals; compofed of friable, loofe, and (light¬ ly agglutinated particles. Colour apple-green of different (hades 5 ftains j feels meagre. Chem. Char.—Remains unchanged before the blow¬ pipe ; colours borax yellowifti red, and is infoluble in nitric acid. Conjlituent Parts. Lampadius. Oxide of nickel 67. iron 23.2 Water 1.5 Lofs 8.3 100.0 Localities, &c.—Found in ftmilar fituations with the preceding fpecies. XIV. MANGANESE Genus. 1. Species. Gray Ore of Manganese, or Oxide of Manganefe. Id. Brochant, ii. 414. Id. Kirwan, ii. 291. Id. Hauy, iv. 243. This fpecies is divided into four fubfpecies : 1. radi¬ ated j 2. foliated 5 3. compaft ; and, 4. earthy. Subfpecies 1. Radiated Gray Ore of Manganese. EJJen. Char.—Colours borax violet. Exter. Char.—Maffive or diffeminated, or cryftalli- zed in oblique four-fided prifms, or in acicular prifms fafcicularly grouped together; the cryftals are va- rioufly modified. Faces (freaked longitudinally; ftiin¬ ing or refplendentj fradure radiated 3 fragments wedge- (haped. Subfpecies 2. Foliated Gray Ore of Manganese* Exter. Char.—Found maflive, diffeminated, or cry- ftallized in fmall, re£langular, .four-fided tables, fafci¬ cularly grouped ; luitre (hining 3 frafture foliated. Colour fimilar to the former 3 ftreak black and dull 3 ftains 3 foft, and brittle. Spec. grav. 3.74. Subfpecies 3. Compact Gray Ore of Manganese. Exter. Char.—Maffive or diffeminated, in angular, or botryoidal, or dendritical forms 3 luftre glimmering 3 frafture uneven, fometimes even or conchoidal. Colour fteel gray, or bluifti black 3 ftains 3 femihard, or foft 3 brittle. Conf. Parts—approach prefty nearly to thofe of the radiated variety. Subfpecies 4. Earthy Gray Ore of Manganese. Exter. Char.—Found maffive, diffeminated, fome-- times fuperficial and dendritical 3 dull 3 fometimes a lit¬ tle glimmering 3 fracture earthy. Colour between fteel gray and bluiffi black 3 ftains very much 3 very foft, often even friable 3 feels meagre. Confituent Parts—fuppofed to be the fame as the for¬ mer, but with a larger proportion of oxide of iron. Chem. Char.—Gray ore of manganefe is infufible be¬ fore the blowT-pipe, but becomes of a blackilh brown colour ; gives a blue colour to borax. Localities, &c.— A.11 the varieties of this fpecies are ufually found together, and chiefly in primitive moun¬ tains. The earthy ore of manganefe almoft always ac¬ companies fparry iron ore, and other ores of iron. Man¬ ganefe is found in confiderable abundance in Saxony, Bohemia, France, near Exeter in England, and in A- berdeenfliire in Scotland. 2. Species. Black Ore of Manganese.. Exter. Char.—Found maffive, diffeminated, or cry— ftallized in fmall four-fided double pyramids, arranged- icu M MINER jVIjtnHic in rows; furface fliinin^ ; internal luftre weakly glim- ; ■ ■ menng j fraelure imperfeflly foliated. Colour grayifti black, and brownilli black j ftreak dull, brownifh red ; foft; brittle. Localities, &c.—This fpecies is of rare occurrence, it has been found in Thuringia, forming a cruft on gray ore of manganefe, and alfo, it is faid, in Pied¬ mont. 3. Species. Red Ore of Manganese, or Carbonate of Manganefe, Extcr. Char.—Maftive, difleminated, botryoidal, &c. or cry;-, i'rzed in flat rhomboids, or in very fmall pyra¬ mids or lenfes. Surface of the cryftals fmooth ; dull, or • ’' kly glimmerings fra61ure uneven or fplintery. Colour rofe red, or browniftr white ; tranflucent at the edges ; femihard j brittle. Spec. grav. 3.23. C/ietn. Char.—Infulible before the blow-pipe •, be¬ comes grayifh black, and colours borax violet blue, or orimfen red. ConJHtuent Parts. Oxide of manganefe ■ i ron Carbonic acid Silica Localities, &c—This fpecies of manganefe, which is rare, is found in Tranfylvania at Offenbanya, and particularly at Nagyag, where it conftitutes part of the mafles of an auriferous vein, from which the gold ore of Nagyag is obtained. XV. MOLYBDENA Genus. 1. Species. Sulphuret of Molybdena. Id. Brochant, ii. 432. Id. KirwTan, ii. 322. Id. Hatty, iv. 289. Exter. Char.—Maftive or dilfeminated, fometimes in plates, and rarely cryftallized in equal fix-ftded tables} cryftals fmall, imbedded, the lateral faces (hining } in¬ ternal luftre ftnn’mg } fra61ure foliated } fragments ra¬ ther blunt-edged, fometimes in plates. Colour lead gray } opaque ; ftains, and writes; very foft, and eafily frangible } flexible in thin plates, but not elaftic ; feels greafy. Spec. grav. 4.56 to 4.73. Chern. Char.—Infufible before tbe blow-pipe } gives out a fulphureous fmell ; nitric acid converts it to a white oxide, wdiich is the molybdic acid. Lampaditts. 48. 2.1 49. •9 100.0 A L O G Y. Part I. found in Bohe .da, Saxony, Sweden, France, and Eng- Claffifica- land. tion. XVI. ARSENIC Genus. 1. Species. Native Arsenic. Id. Broch. ii. 435. Id. Kirw. ii. 255. Id. Ilaiiy, iv. 220. Exter. Char.—Maflive, difleminated, in imitative forms, or with impreflions; furface rough or granula¬ ted } dull, or weakly glimmering j internal luftre weak¬ ly fhining ; fraflure uneven, lometimes imperfe£Uy fo¬ liated } fragments rather blunt-edged in plates. Colour light lead-gray, tin-white or grayifh black when tarnifhed ; ftreak fltining } femihard} very eafily frangible. Spec. grav. j.72 to 5.76. Chew. Char.—Melts readily before the blow-pipe, giving out white vapour, with the fmell of garlic } then burns with a bluifh flame, and is diflipated, leaving only a whitifh powder, w'hich is the oxide of arfenic. Confituent Parts.-—Native arfenic is ufually alloyed with a fmall portion of iron, and fometimes alfo with a little gold or filver. Localities, &c.— Found in veins in primitive moun¬ tains, accompanied by ores of ftlver, lead, copper, quartz, and earthy fpars, in Bohemia, Saxony, and France, 2. Species. Arsenical Pyrites. Id. Broch. ii. 438. Id. Kirw. ii. 236. Fer Arfenical, Hiuy, iv. 56. I his is divided into two fubfpecies, common and ar¬ gentiferous. Subfpecies 1. Common Arsenical Pyrites. Exter. Char.—Maflive, difleminated, often cryftalliz¬ ed in oblique four-fided prifms, acute octahedrons, and. lenfes } the prifms being varioufly modified on their angles, faces, and extremities. Cryftals fmall} lateial faces fmooth, fhining } bevelled faces ftreaked tranf- verfely } luftre Alining } fra61ure uneven. Colour filvery white, but ufually tarnifhed yellow, or bluifli, and iridefeent} hard } brittle. Specific gravity 5.75106.52. Phyf. Char.—By fridlion gives out the odour of gar¬ lic. Chew. Char.—Before the blow-pipe gives out a white vapour with the odour of arfenic, the fumes depofiting a white powder on cold bodies} a reddifh brown mat¬ ter, which is infufible, remains. Conflituent Parts.—Compofed of arfenic, iron, and fulphur. Conjlituent Parts. Pelletier. Klaproth. Molybdic acid 45 60 Sulphur 55 40 ioo 100 Localities, &c.—-Alw’ays found in primitive moun¬ tains, in nefts or nodules, and very commonly in the neighbourhood of tin ores. It is alfo accompanied by Wolfram, quartz, native arfenic, and fluor fpar. It j,s 3 Subfpecies 2. Argentiferous Arsenical Pyrites, Exter. Char Rarely maftive, often difleminated, and cryftallized in fmall, acicular, four fided prifms} luftre iliining, or weakly {hining } fradlure uneven. Colour tin-white, or filvery-wrhite, ufually tarniihed. Localities, &c.—Arfenical pyrites is found in Bo¬ hemia, Saxony, and Silefia, in veins of primitive moun¬ tains, or difleminated in the rocks. The fecond variety is found in fimilar places, and dif¬ fers only from the firft, in being combined with a fraali quantity cf filver, wrhich varies from i to 10 per cent. g. Speciesa Part T. MINERALOGY. Claflifica- 3. Species. Orpiment. Id. Kirw, ii. 260. Id. Brocli. ii. 444. Hauy, iv. 234. This fpecies is divided into two fubfpecies, yellow and red. Subfpecies 1. Yellow Orpiment. Exter. Char.—Maffive, diffeminated, fuperhcial, and cryftallized in oblique four-fided prifms, bevelled at the extremity, or terminated by a four-fided pyramid, or in acute oflahedrons. Cryflals fmall, and confufedly aggregated •, furface fmooth 5 that of the bevelment «nd pyramids finely ftreaked ; internal lulrre refplend- ent, between refinous and adamantine j fradure foliat¬ ed j fragments in plates. Colour citron-yellow, golden-yellow, cr aurora-red •, tranflucent j in thin plates, femitranfparent 5 foft; flex¬ ible in thin plates. Spec. grav. 3.31 to 3.45. ChetTi. Char.—Gives out a blue flame before the blow¬ pipe, with white vapour, and the fmell of arfenic and (ulphur. greenilh-white ; opaque ; cryflals tranflucent; foft, or friable. Spec. grav. 3.706. Chem. Char.—Before the blow-pipe it gives out a white fume, and a garlic odour; burns with a bluifli flame, and is entirely diflipated} foluble in water and acids. Conjlituent Paris.—This is a pure oxide of arfenic, with an accidental mixture of earth. Localities, &c.—A rare mineral, but is found in fmall quantity, along with native arfenic, and ores of cobalt, in Bohemia and Hungary. 5. Species. Pharmacolite, or Arfcniate of Lime. Id. Broch. ii. 523. Chaux Arfeniate, Hauy,di. 293. Exter. Char.—Found in fmall capillary cryflals; luflre glimmering, filky j fracture fibrous or radiated. Colour fnow-white 5 tranflucent 5 very foft. Specific gravity 2.53 to 2.64. Chem. Char.—Soluble in nitric acid with effervef- cence, and gives out the odour of arfenic before the blow-pipe. 24? Metallic Ores. Conjlituent Parts. Kirwan. WeilrumR. Arfenic, 84 80 Sulphur, 16 20 Conjlituent Parts. Arfenic acid, Lime, Water, Klaproth. 5°.54 ‘ 2 5- 24.46 100 100 100.CO * * Anafyr. Localities, Sic.— Finally found in ftratiform moun- Localities, &c.—Found in a vein in primitive rocks, tains, accompanied by clay, quartz, and fometimes by accompanied by heavy fpar and gypfum, near Wittichen red orpiment, in Tranfylvania, Hungary, and other in Suabia. It has allb been found in France, places. Subfpecies 2. Red Orpiment. Exter. Char.—Rarely mafiive, ufually difleminated, or fuperficial, and often cryflallized in oblique four- fided prifms, with obtufe lateral edges, truncated, or bevelled : cryflals fmall, flreaked longitudinally ; Aim¬ ing or refplendent ; internal luftre fln’ning between vi¬ treous and refinous 5 frablure uneven, or conchoidal. Colour light aurora-red, fcarlet-red, orange yellow1 j tranflucent,. or femitranfparent, often opaque ; flreak orange, or citron-yellow j very loft : fomewhat brittle. Spec. grav. 3.2. Chem. Char.-—Similar to the former. Conjlituent Parts—according to fome, the fame as the preceding, but with the addition of iron and filica, with a fmaller proportion of fulphur. Localities, Sic.—Chiefly found in primitive moun¬ tains, as in Saxony, Hungary, France, and in the neigh¬ bourhood of ./Etna and Vefuvius. XVII. TUNGSTEN Genus. 1. Species. Wolfram, Id. Kirw. ii. 316. Id. Broch. ii. 456. Scleelin Per- rugine, Haiiy, iv. 314. Exter. Cha*-.—Found maflive, difleminated, or cry- ftalfized in fix-lided prifms, and in rectangular four- fided tables, which are varioutly modified. Cryflals' not very fmall, ufually grouped ; internal luftre Alin¬ ing or refplendent j longitudinal fraCture foliated j crofs- fracture uneven. Colour brownifh black, or perfeCt black, fometimes tarniftied j opaque j flreak dark reddifti-brown 5 foft j brittle. Spec. grav. 7.11 to 7.33. Chew. Char.—Before the blow-pipe it decrepitates, but is infufible. Conjlituent Paris. 4. Species. Native Oxide of Arsenic. Id. Kirw. ii. 258. Id. Broch. ii. 450. Id. Hauy, iv. 225. Exter. Char.—Found fuperficial, in an earthy form, and friable, on other minerals-, rarely indurated, forre- times botryoidal, or cryflallized in capillary cryflals, very fmall oCtahedrons, or four-fided tables; luflre glimmering or dull ; fraCture earthy or fibrous. Colour [now-white, yellcwilh white, reddilh cr Delhuyart, Tungftic acid, 65 Oxide of manganefe, 22 Oxide of iron, 13 Silica, — Lofs, — 100 Wiegleb. Klaproth. Vanquelim 35-75 46-9 67. 32- ~ 6.25 11, 31.2 18. 1.5 21.25 21.9 7.25 100.00 100.0 100.00 localities, See.—Wolfram, which is a rare mineral, is found m primitive mountains, accompanied by quartz, and 248 MINERALOGY. Part I. Metallic and tin ores, i 0res; . England. in Bohemia, France, and Cornwall in 2. Species. Tungstate of Lime. Tungsten, Kirw. ii. 314. Id. Broch. ii. 453’ Scheelin Calcaire, Hauy, iv. 3 20. Enter. CVhzr.—Maflive, diffeminated, fometimes cry- ftallized in regular o&ahedrons, which are fometimes (lightly bevelled on the edges of the common bafe. Cryftals ufually fmall; furface fmooth, refplendent $ bevelled furface ftreaked tranfverfely j internal luftre fliining or refplendent, relinous or adamantine j fra£ture foliated. Colour grayiAi or yellovviAi white 5 tranllucent 5 femi- hard ; brittle. Spec. grav. 6.06. Chem. Char.—Before the blow-pipe decrepitates, and lofes its tranfparency, but is infulible. Reduced to powder, and digefted with nitric or muriatic acid, it leaves a citron yellow refiduum, w7hich is tungftic acid. Conjlituent Parts. Klaproth. Oxide of tungAen ————— iron — manganefe Lime Silica Lofs 77-75 17.6 3- 1.65 75-25 1.25 •75 18.7 i-5 2.55 100.00 100.00 Localities, &c.—This is a rare mineral, ufually found in primitive mountains, accompanied by ores of tin, fome iron ores, quartz, fluor fpar, &c. in Sweden, Saxony, and Cornwall in England. XVIII. TITANIUM Genus. 1. Species. Menachanite. Id. Brochant, ii. 468. Id. Kirwan, ii. 326. Hauy, iv. 3°5- Exter. Char.—Found in fmall, detached, rounded grains 5 furface rough, or weakly glimmering j luAre Alining, femi-metallic } frafture imperfeftly foliated. Colour grayilh or iron black j foft or femi-hard 5 brittle. Spec. grav. 4.4. Chem. Char.—Infulible before the blow-pipe ; co¬ lours borax greenilh brown. Conflituent Parts. Klaproth. ' Cbenevix. Oxide of titanium 45-25 40 ———iron 51. 49 Silica 3.5 11 Oxide of manganefe 2.5 — 100.00 100 Localities, &c.—This mineral was firA difcovered by Mr-Gregor, among fand, in the bed of a rivulet, in the valley of Menachan in Cornwall j hence its name. It has fince been found in the ifland of Providence, one of the Bahamas, and at Botany Bay in New Hol¬ land. 2. Species. Octahedrite. Anatafe, Hauy, iii. 129. Id. Brochant, ii. 548. tahedrite, Sauffure, Voyages, §. 1901. Exter. Char.—Found only cryAallized, in elongated, oftahedrons with fquare bafes, and truncated, or acu¬ minated j cryAals fmall and imbedded j lateral faces Areaked tranfverfely j luAre refplendent, vitreous j frac¬ ture foliated. Colour Aeel gray, fometimes light indigo blue; tranf- lucent, femi-hard ; brittle. Spec. grav. 3.85. Chem. Char.—Infufible before the blow-pipe, but melts with borax, which it colours green, and in cool¬ ing, cryAallizes in needles. Conjl. Parts.—It is chiefly compofed of oxide of ti¬ tanium. Localities, &c.—Has been found lining the cavities of a vein, accompanied by quartz and feldfpar, in a primitive rock, in Dauphine in France. Oc- 3. Species. Titanite. Id. Kirwan, ii. 329. Le Ruthiie, Brochant, ii. 470. Titane Oxide, Hauy, iv. 296. Red Schorl of many. Exter. Char.—Found cryAallized in oblique four- fided prifms, the lateral edges truncated $ fometimes thefe cryAals are double, being united obliquely j alfo in acicular and capillary cryftals, imbedded and group¬ ed together j furface longitudinally Areaked, Alining *, internal luflre Alining, adamantine ; fradlure foliated. Colour blood-red or reddifh brown $ opaque, or tranflucent; hard j brittle. Spec. grav. 4.1 to 4.24. Chem. Char.—Infufible before the blow-pipe, but lofes its tranfparency, and becomes gray. Conjl. Parts.—Compofed chiefly of oxide of tita¬ nium. Localities, &c.—Found in Hungary, in gneifs, and imbedded in quartz. It has been found alfo in Switzer¬ land, Spain, and France. 4. Species. Nigrine. Kirwan, ii, 331. Brochant, ii. 474. Hauy, iv. 307. Exter. Char.-—Diffeminated, fometimes amorphous, often cryAallized in oblique four-fided prifms, varioufly modified by truncations and bevelments. Surface fmooth j luflre fliining, or refplendent, between refinous and vi¬ treous $ fradture foliated. Colour dark brownifli black, yellowifh white, or violet brown ; opaque, or tranflucent; femi-hard. Spec, grav. 3.51 to 4.6. Chem. Char—Infufible before the blow-pipe. Oxide .of titanium Silica Lime Conjlituent Parts. Klaproth. 33 35 32 I GO Abilgaard. 58 22 20 100 74 8 18 100 Localities, &c.—-Found in Bavaria, and dal in Norway. at Aren- 5. Species, 4 Part T. MINERALOGY. 5. Species. Brown Ore of Titanium. This fpecies in its chara&ers fo nearly refembles the preceding, that it may be confidered merely as a varie¬ ty, as has been done by Brochant and Hauy. 6. Species. Iserine. Id. Brochant, ii. 478. f Exter. Char.—Found in rounded or angular grains, having a rough and glimmering furface j internally Ihining 5 fradlure conchoidal. Colour iron black, or brownilh 5 hard 5 brittle. Spec, grav. 45. Chem. Char.—Melts before the blow-pipe into a dark brown flag. Conjlituent Parts. Klaproth. Oxide of titanium 59.1 iron 30.1 — uranium 10.2 Lofs .6 100.0 Localities, &c.—Found in the fand of a river in Bo¬ hemia, called Ifer, whence the name is derived. XIX. URANIUM Genus. 1. Species. Pitchy Ore of Uranium. Id. Brochant, ii. 460. Kirwan, ii. 305. Hauy, iv. 280. Exter. Char.—Maflive, diffeminated, fometimes cel¬ lular *, fhiningor glimmering; fra&ure imperfectly con¬ choidal ; fragments rather fharp-edged. Colour velvet black, iron black, or bluifh, fome¬ times fteel-tarnifhed ; ftreak black; opaque ; femi-hard; brittle. Spec. grav. 6.5 to 7.5. Chem Char.—Infufible before the blow-pipe; foluble in nitric acid. Conjlituent Parts. Klaproth. Uranium a little oxidated 86.5 Sulphuret of lead Oxide of iron Silica 6. 2-5 5' 100.0 Colour emerald or grafs green of various (hades, rare¬ ly wax yellow; tranflucent; ftreak greenifti white ; foft; not very brittle. Spec. grav. 3.12. Chem. Char.—Soluble, without effervefcence, in ni¬ tric acid, wdrich it colours citron yellow. Conjl. Parts.—This fpecies is an oxide of uranium, with a fmall portion of copper. Localities, Sac.—Found in Saxony, France, and Corn¬ wall in England, accompanied by fame ores of iron, fometimes by cobalt. 3. Species. Uranite Ochre. Id. Broch. ii. 466. Id. Kirw. ii. 303. Exter. Char.—Found maflive, but ufually diffemi¬ nated, or fuperficial; is dull, or rarely filming; fradturq earthy, or foliated ; fragments blunt-edged. Colour citron yellow, aurora red, or fulphur yellow ; opaque ; foft and friable ; brittle ; ftains a little ; feels meagre. Spec. grav. 3.15 to 3.24. r Conjhtuent Parts.—Compofed of oxide of uranium, with a portion of iron. Localities^ &c.—Found in fimilar places with the former. XX. TELLURIUM Genus. Hauy, 1. Species. Native Tellurium. Id. Broch. ii. 480. Sylvanite, Kirw. ii. 324. iv-32i- Exter. Char.—Maflive or diffeminated ; fhining ; fraflure foliated. Colour between tin and ft! very white ; foft; not very brittle. Spec. grav. 5.7 to 6.1. Chem. Char.—Melts eafily before the blow-pipe. Conjlituent Parts. Klaproth. Tellurium 92.6 Iron 7.2 Gold .2 100.0 Localities, &c.—-Has been only found at Fatzebay in Tranfylvania, w'here it exifts in veins, in mountains’ of gray wapken and tranfition limeftone. The ore is dug out for the purpofe of extraditing the gold. It was called aurum paradoxum, and aurum proble- maticum, becaufe its external appearance did not indi¬ cate that it contained gold. 2. Species. Graphic Ore of Tellurium. 24 Metall Ores. Localities, &c.—Found in Bohemia and Saxony, ac¬ companying galena, copper pyrites, iron ochre, and fome ores of filver and cobalt. 2. Species. Micaceous Uranite. Id. Brochant, ii. 463. Kirwan, ii. 304. Exter. Char.—Sometimes in thin layers, but often cry ft alii zed in reftangular four-fided tables ; in cubes, and fix-fided pvifms varioufly modified. Cryftals imall, and grouped together; luitre fhining, pearly ; frac¬ ture foliated. Vol. XIV. Part I. Id. Broch. ii. 482. Hauy, iv. 327. Exter. Char.—Maflive, and cryftallized in flat four or fix-fided pfifms, which are arranged in rows, ex¬ hibiting fomething of the appearance of written cha¬ racters, and hence the name graphic ore. Surface fmooth, fhining; longitudinal fraCture foliated and re- fplendent; crofs fraCture uneven. Colour tin white, yellowifh, or lead gray; foft and brittle. Spec. grav. 5.72. Chem. Char.—Burns with a greenifh flame before the blow-pipe. I i Conjlituent o' O 250 Metallic Cbnftisuent Parts. Tellurium Gold Silver Klaproth. 60 3° 10 Ciaffifica- tioq. ICO Localities, &c.—Has only been found at Offenbanya in Tranfylvania, in veins traverfing porphyry and gra¬ nular limeftone accompanied by iron pyrites and copper ore/ It is wrought for the fake of the gold. V Species. Yellow Ore of Tellurium. Id. Broch.ii. 484. Hauy, iv. 327. Exter. Char.—Diffeminated, and cryftallized in fmall fcur-fided prifms j fliining, or weakly ihining > fradure foliated j crofs fradure uneven. Colour filvery white, brafs yellow, or gray. 6hem. Char.—Soluble in nitric acid. M 1NERAL0GY. Part ^ Colour fteel grey, and ufually covered with a greenilh tfilorelcence j folt, or femihard j not very brittle. Conjlituent Parts.—This is fqppofed to be an alloy of chromium, Exter. Char. &.c.—Found in the gold mineofRud- nick near Schlangenberg in Suabia, in a matrix ol wThite quartz, containing gold and galena. 2. Species. Ochre of Chromium. Exter. Char.—Maffive, diffeminated, and in thin plates ; dull *, fradure uneven or earthy. Colour verdigris green, or yellowilh ; foft. Localities, &c.— hound only in the fame place, ac¬ companying the former. The chromates ot lead and iron have been already deferibed among the ores of thofe metals. XXII. COLUMBIUM Genus. Conjlituent Parts. Klaproth. Tellurium 44‘75 Gold 26.75 Lead 19*5 Silver 8.5 Sulphur .5 100.00 Exter. Char.—Maflivej fradure uneven, or foliated \ luftre Ihining. Colour dark gray 5 opaque j not very hard ) brittle. Spec. grav. 5.918. Conjhtuent Parts. Oxide of columbium 78 iron 21 Lofs 1 Localities, &c.—Found only at Nagyag in Tran¬ fylvania. 4. Species. Black or Foliated Ore of Tellurium. Id. Broch. ii. 486. Hauy, iv. 327. Exter. Char.—Found in plates, which are united in¬ to maffes, or diffeminated, rarely cryftallized in fix- fided tables; furface fmooth, (hining; external luftre refplendent; fradure foliated. Colour between lead gray and iron black ; ftains; foft; flexible in thin plates. Spec, grav, 8.91. Chem. Char.—Before the blow-pipe the fulphur and tellurium are diflipated in white fumes, and a metallic globule remains, furrounded by a black flag. Conjlituent Parts. Klaproth. Tellurium 33. Lead fo. Gold ‘ 8.5 Silver and copper 1. Sulphur 7.5 100.0 Localities, &c.—Found only in the fame place with the preceding. XXL CHROMIUM Genus. 1. Species. Needle Ore of Chromium. Exter. Char.—Found in fmall cryftals, which are imbedded; luftre fliining; fradure uneven or conchoi- daL 100 Localities, &c.—This mineral, of which the only fpecimen known is in the Britifti Mufeum, w'as brought from Maffachuffets in America; it was analyzed, by Mr Hatchett, and found to contain a new7 metal, wnich he denominated columbium. XXIII. TANTALIUM Genus. Two fpecies of this mineral have been, difeovered; tantalite, and yttrio-tantalite. 1. Species. Tantalite. Exter. Char. Cryftallized in odahedrons; furface fmooth ; fradure compad. Colour bluifti gray, or black. Spec. grav. 7'95’ Conjlituent Parts.—Compofed of tantalium, iron, and manganefe. Localities. &c.—Found in Finland, in globular pieces^ in a vein of red feldfpar, traverfing a gneifs rock. 2. Species. Yttrio-Tanialite. Exter. Char.—Diffeminated, in pieces of the fize of a nut; fradure even ; luftre metallic. Colour dark gray ; may be fcratched with a knife,; powder gray. Spec. grav. 5.13. Conjlituent Parts.—Compofed of iron, manganele, tantalium, and the new earth yttria. Localities, &c.—Found at Ytterby in Sweden, in the fame place with gadolinite. Thefe minerals were analyzed by Eckeberg, who difeovered in them the new metal tantalium. XXiY, Part T. XXIV. CERIUM Genus, i. Species. Cerite. Exter. Char.—Found m.iffive or diffeminated ; luftre weakly glimmering ; frafture fine grained, even. Colour pale rofe red; opaque ; powder grayiflj 5 fcratches glafs. Spec. grav. 4.5 to 4.9. Chem. Char.—Infufible before the blow pipe, and does not colour borax. Conjlituent Parts. Vauquelin. MINERALOGY. 251 Exter. Char.—Found maffive; finning, vitreous j ffaO- Meul!i6 ture conchoidal. ^ Colour velvet black, or brownifh blaoi- *, opaque \ hard j fcratches quartz ; brittle. Spec. grav. 4.04^ Chem. Char.—Reduced to powder, and heated ia diluted nitric acid, it is converted into a thick yel- lowifh gray jelly. Before the blow-pipe it decrepit tates and becomes whitifh red, but remains infufible. Oxide of cerium iron Silica Lime Water and carbonic acid Lofs 67. .02 I7* .02 .12 15.84 100 00 Klaproth. 54-5 4- 34- 5- 2-5 100.0 APPENDIX. IX. YTTRIAN Genus. To follow Strontian genus, p. 209. Species. Gadolinite. Sel. Brochant, ii. 512. Id. Haiiy, iii. 141. Yrtria Silica Lime Alum;>a Oxide of iron manganefe Water and carbonic acid Lofs Conf ituent Parts. Eckeberg. Vauquelin. 47-5 25- 35* 25-5 2. 4-5 18. 25. 2. 10.5 Localities, &c.—This mineral has been found in the copper mine of Baftnaes, at Riddarhytta, in Sweden, accompanied by copper, molybdena, bifmuth, mica, and hornblende. The netv metal contained in this mineral was dif- covered by Hinger and Berzelius, chemills at Stock¬ holm. 100.0 100.0 Klaproth. 59-75 21.25 •5 17.5 •5 •5 100.00 Localities, &c.—This mineral was examined by pro- feffor Gadolin of Sweden, wbofe name it bears, and found to contain a peculiar earth. It was found near Ytterby in Sweden, and hence the new earth was call- Ettria. The unavoidable length to which the firft part of this treatife has extended, and fome other circumftances, render it neceffary for us to introduce in a different part of the work, what we propofed to lay before our readers in the fecond part relative to the analyfis of ftones and metallurgical operations. See Ores, duci'ion of, and Stones, Analyfis of. EXPLANATION of the PLATES. Plate CCCLI. Fig. 1. Reprefents the goniometer or graphometer, an inftrument invented by Carangeau for meafuring the angles of cryflals. MTN is a graduated femicircle of brais or filver, furnifhed with two arms or rulers AB, FG, one of which, FG, has a flit from a to R, except¬ ing the crofs bar at K, which {Lengthens the inftru- ment. This arm is fixed to a brafs ruler at R and c placed behind, and which makes part of the femicircle. The arm FG is connedled with the ruler behind by nails which enter the flit and are furnifhed with nuts. The other aim has alio a flit or opening from x to c, where it is fixed to the frrft by the fcrew nail which paffes through both. By flackening the fcrews, the two parts e G and c B may he fhortened at pleafure. The arm AB being only fixed at c, which is the centre of the circle, moves round this centre, while the arm GF re¬ mains conftantly fixed in the dire&ion of the diameter which paflfes through the points o and 1 8o°. The up¬ per part of the arm AB fhould be brought to a thin edge from z to j\ and the line of this edge fbould pafs through the centre c ; becaul'e it is by this edge that the meafure of the angle on the graduated circumference is indicated. To difcover the meafure of any angle of a cryftal, the two arms c B, c G are brought into contaft with the fides containing the angle, and the degree indicated by the line z J on the circumference denotes the meafure of that angle. The inftrument is fo contrived that the arms may be fhortened for the convenience of applying it in different cafes. But it might happen that it could not be applied in cafes where the cryftals are aggregated or attached to the matrix. This difficulty is obviated by another contrivance. The femicircle is furnifhed with a hinge at 90°, by which means it may be dimi- nifhed at pleafure to a. quadrant, by folding back one half. There is a {mail bar of fteel, one end of which is fixed behind the immoveable arm FG, and the other is attached by a notch and fcrew nail at O. When this nail is unfcrewcd, the bar c O falls behind the ruler which fupports FG, and thus one half of the femicircle folds back, and any angle not exceeding 90° may be meafured j but when the angle is greater, it muft be re¬ placed. Fig. 2. is an apparatus by which fmall degrees of I i a elefliicity 252 M I N E R A Explan a- declricity may be obferved in minerals. A is a fmall Opiates 6 brals needle with knobs a b, and moveable on the pivot i at the middle. ’Fhe mineral whofe electricity is to be tried, is rubbed on lilk or woollen, and then prefented to one of the knobs j and by the diftance at which the knob begins to be attracted, the ftrength. of the eleCtri- city may be, in fome degree, eftimated. In the fame way lubftances which become eleCtric by heat, fuch as the tourmaline, are to be tried 5 the fame apparatus may be employed. To afcertain in what part of the mi¬ neral the different electricities exift, take a flick of fealing wax, at the extremity of which a filk thread has been attached, and having rubbed the wax, bring alter¬ nately the oppofite extremities of the fubflance, for ex¬ ample, each of the fummits of a tourmaline, within a fmall diltance of the filk thread. If the extremity which is brought near the thread poffefs negative eleftricity, the thread will be repelled ; on the contrary, it will be at¬ tracted. Or the experiment may be made in another way, particularly when the eleCtrical body is fmall, or its electricity feeble. At B, fig. 2. the tourmaline t /' is held by a pair of pincers in fuch a way that the pole / is at a fmall diftance from the knob a of the needle. C c is the flick of wax, one of whofe extremities is placed on a tube of glafs U it, and which aCts by its extremity C, on the knob a, to excite in it pofitive eleCtricity. In this cafe the wrax, after the extremity which has been rubbed is placed in the pofition defcribed, communi¬ cates to the knob of the needle to which it is prefented, an eleClricity contrary to its own j fo that the extre¬ mity of the tourmaline a&ed on by pofitive eleClri¬ city, repels the needle to which it is prefented, and the other extremity, poffefling negative eleClrieity, attrafts the needle. Fig. 3. is a fpirit of wine blow-pipe, nearly on the plan of that invented by Mr Paul. It is made of brafs, and confifts of the following parts. Is a hollow oval frame about five inches in its longeft dimenfion, w'hich fupports the pillar d and the two lamps b c, which may burn either oil or alcohol, but the latter is the beft. The rim e e flips upon the pillar d as low as the Ihoulder of the latter will permit, but the rim may be raifed at pleafure and kept faft by the ferew peg f. The rim fupports the boiler g which is a Angle hollow piece of thick brafs containing about an ounce of alcohol, and has four openings, viz. three at top <£, z, k, and one at bottom to receive the tube This latter is long enough to reach the level of the outfide or the top of the boiler, and confequent- ly the alcohol within the boiler cannot readily boil over into the tube, and the opening k which corref- ponds with it, is clofely fliut by a ferew ftopper, hol- low’cd out a little beneath, to allow the free paffage of the vapour down the tube. Here the vaporized alcohol is prevented from condenfing at the point 0 by the con¬ tiguity of the flame of the lamp b, and as it paffes on through the hollowinto the jet tube r, it is imme¬ diately kindled by the flame of, the lamp c, and the united flames are compelled fideways with fuch vio¬ lence as to form a long pencil of blue flame, attended v,ith a confideraole roaring node. This continues as long as any alcohol is left in the boiler, which allows ample time for moft blowpipe operations. The boiler is filled at the opening h. The centre hole i is nicely L O G Y. Part I. fitted wdth a fmall brafs plug kept down by a thin flip Explana- of iron /, the other end of which flips over the top of don ot the the upright pillar d, and is confined between two flat Ia^es' . fcrew-plates m n. The ufe of this is as a fafety valve to take away all danger of the boiler burfting by the confined vapour not being able to efcape fail enough through the jet-pipe r, for when the internal preffure is great, the elaflicity of the iron fpring / allows the valve z to rife fufficiently to let out part of the enclofed va¬ pour. The ferew Hoppers h and k are made ftill tight¬ er by collars of leather, as is the part where the tube 0 joins the boiler. The jet-pipe r has a complete rota¬ tory motion, fo that the flame may be impelled in any diredlion. This is effefled by turning in the form of a ball that pait of the pipe which is inclofed in the hol¬ low p q. But this blow-pipe, although an elegant philofophi- cal apparatus, will not be found to anfwer where a great degree of heat is required to be kept up for a confider- able time. Other contrivances, therefore, of a Ampler nature, have been propofed : and perhaps the beft of thefe is the blow-pipe which is ufed by the mouth. The following is a defeription of a blow-pipe of this kind. Fig. 4. reprefents this blow-pipe. « is a brafs tube, having a circular enlargement c, for the purpofe of con¬ denfing the moifture which is blown from the lungs ; the fmaller end d is moveable round the centre c, fo that any degree of obliquity may be given to the flame. Fig. 5. is a feparate jet-pipe with a fmall opening, which is ferewed on the blow-pipe at d; and it may be convenient to have two or three jet-pipes of different fizes, according as a larger and more moderate, or a fmaller and more intenfe flame is wanted, b h a piece of ivory which flips on the larger end, for the purpofe of being applied to the mouth, as being more aoree- able. & I he beft kind of flame for blowing through with the common blow-pipe is a wax or tallow candle with a very large wick, which ftiould be kept fnuffed mode¬ rately low, and the wick turned a little afide from the pipe. A fpirit lamp is fometimes ufed, which makes a perfedlly clear flame without fmoke, but weak when ufed in this way. There is a kind of knack in blowing with the mouth, which is not eafily defcribed, and re¬ quires a little pradlice to be performed with eafe. As the flame muft often be kept for feveral minutes, the aft of relpiration muft be carried on through the noftrils without interruption, and the ftrefs of blowing muft be performed merely by compreflion of the cheeks upon the air in the mouth. The fubftance to be heated is placed either on a piece of charcoal or a metallic fupport. When the former is ufed, a large clofe well-burnt piece of charcoal muft be chofen, a fmall fhallow nole fcooped out with a knife, and the fubftance laid upen it. The charcoal itfelf kindles all round the hole, and the hole is thus gradual¬ ly enlarged ; and the heat too is kept up round the fub¬ ftance much more uniformly than when a metal fupport is ufed. At the fame time however the chemical effeft produced by heated charcoal fhould not be forgotten particularly the reduftion of metallic oxides, and the deoxygenation of the fixed acids; fo that, for example, a fmall heap of minium or litharge heated red-hot on charcoal Fart I. MINER Explana¬ tion of the Plates * Aikin's Diet- of Chemiiiry, &c. Ap- pendix. f mch. 'your. xv. 284. charcoal hy the blow-pipe, is fpeedily teduced to a glo¬ bule of metallic lead j the phofphates are partially re¬ duced to phofphurets, &c. Fur a metallic fujiport, platina is in general by far the bed material. A fmall fpoon of this metal, the fliank of which may be duck in a cork when held, and a fmall filver cup, the lhank of which is fixed into a wooden handle, may be ufed in fulions with borax or alkaline fluxes. A fmall forceps lately brought into ufe, and made entirely of two thin pieces of platina joined by rivets, and bent, will be ufeful in holding any fmall hard fubdance in the blow-pipe flame for any length of time, without danger of the points of the forceps melt¬ ing ; and it is alfo found that this metal is fo much worfe a condudor of heat than any other, that the forceps never gets too hot for the naked fingers to touch at the bend *. Fig. 6. reprefents a portable pocket blow-pipe, in¬ vented by Dr Wollafton, and of its adlual fize. The interior tube is longer than the exterior, that it may be readily withdrawn 5 and the upper edge of the large end is turned outward, to diminifh the effort of the lips requifite for retaining it in the mouth. Fig. 7. reprefents the whole apparatus, one half of its real dimeniions, and connedfed for ufe. The fmall extremity a is placed obliquely at an angle of about 120°, that the flame impelled by it may be carried to a more convenient diftance from the eye, and thus an- fwering the purpofe of a longer blow-pipe. This oblique piece a is compofed of three parts, the largefl: of which is made ftronger, that it may not be injured by ufe. One end is clofed, and into the other is inferted a fmall peg of wood, perforated fo as to receive the tip which is intended to be occafionally feparated, for the pur¬ pofe of pafiing a fine needle into it, to remove obftruc- tions f. Plates CCCLII. and CCCLIII. Fig. 1. Diamond,— fpheroidal, with 48 convex faces. Fig. 2. Zircon,—the primitive form an octahedron with ifofceles triangles. Fig. 3. Zz'/rofl,—-reCtangular four-fided prifm termi¬ nated by a four-fided pyramid fet on the lateral faces. Fig. 4. Hyacinth,—a dodecahedron formed from a reCtangular four-fided prifm terminated by a four-fided pyramid fet on the lateral edges. Fig. 5. Chrysobery/,— double fix-fided pyramid flat¬ tened, having the fummits truncated. Fig. 6. Chrysolite,—a comprefled eight-fided prifm, terminated by an eight-fided pyramid, whofe fides cor- refpond to thofe of the prifm, and whofe fummit is trun¬ cated by a convex furface. Fig. 7. Augite,—\k\t primitive form, an oblique four fided prifm with rhomboidal bafes. Fig. 8. Common form of augite,—a fliort, eight-fided, comprefled prifm, terminated by twm oblique faces. Fig 9. Pijla%ite,—a fix-fided prifm with two broad and four narrow faces, and bevelled at the extre¬ mities. Fig. ic. and 11. other forms in which the prifms are terminated by feveral oblique faces with a truncated fumiiiit. Fig. t 2. Vefuvian,—a four-fided prifm wnth the edges truncated, and terminated by four oblique and one hori¬ zontal face. A L O G Y. t J> P'ig. 13. Garnet,—primitive form, a rhomboidal do¬ decahedron. Fig. 14. Trapet&oidalgarnet,—compofed of 24 faces, which are equal and fimilar trapezoids. Fig. 15. Grenatite,—a fix-fided pvilm with the greater angles at each bafe truncated. Fig. 16. Tw'o cryftals of the fame crofling each other obliquely. Staurotide, obliqueangle, of Haiiy. Fig. 17. Corundum,—two fix-fided pyramids united by the bafes, with the fummits and angles truncated. Fig. 18. A fix-fided prifm, having the alternate angles at each bafe truncated. Fig. 19. Topar.,—an eight-fided prifm terminated by an obtufe four-fided pyramid at one extremity, and by a different one at the other. Fig. 20. A fimilar prifm with fix of the terminal edges truncated. Fig. 22. Tourmaline,—primitive form, which is am obtufe rhomboid. Fig. 23. A nine-fided prifm, terminated at one ex¬ tremity by.a fix-fided fummit, and by a three-fided fum- Explana- tion of the Plates, mit at the other. Fig. 24. Same prifm with a three and a feven-fided fummit at the extremities. Fig. 25. Axinite or Thumerjlone,—primitive form, which is a reClangular four-fided prifm, whofe bafes are oblique-angled parallelograms. Fig. 26. A fecondary form, fame prifm, having the alternate lateral and terminal edges truncated. Fig. 27. Rock-crystal.—A double fix-fided pyramid. Fig. 28. A fix-fided prifm terminated at each extre¬ mity by a fix-fided pyramid, having the alternate angles at the oppofite bafes (lightly truncated. Fig. 29. Feldfpar,—the primitive form, which is an oblique-angled parallelepiped. Fig. 30. An oblique four-fided prifm. Fig. 31. A fix-fided prifm with four of the angles truncated, and the two extremities bevelled. Fig. 32. The fame prifm, with four of the terminal edges truncated. Fig. 33. An oblique four-fided prifm, bevelled and truncated at the extremities. Fig. 34. Chiajlolite,-—the outer rhomboid marked with black lines parallel to the fides of the black inter¬ nal rhomboid. Fig. 3 5. Foliated Zeolite, or Stilbite,—comprefled four-fided prifm, terminated by a four-fided fummit fet on the lateral edges. Fig. 36. A fix-fided prifm with two folid angles at each extremity, truncated. Fig. 37. Cubic Zeolite or Analcime,—the cube with all the folid angles truncated. Fig. 38. Cubic Zeolite or Chabafe,—compofed of three rhomboids. Fig. 39. Crofs-flone,—* double cryftal compofed of two dodecahedrons crofling each other at right angles. Fig. 40. Hornblende,—primitive form, an oblique four-fided prifm, whofe bafe is a rhomboid. Fig. 41. Bafaltic Hornblende,—a fix-fided prifm ter¬ minated at one -extremity by four trapezoidal planes ; and at the other by a bevelment, the planes of which are pentagons. Fig. 42. Tremolite,—an oblique four-fided prifm, having the acute angles truncated and terminated by a dihedral fummit. Fi 254 Explima- MINERALOGY. Fig. 43. Calcareous Spar, or Carbonate of Lime,— tI«ni;;e:he primitive form a rhomboid Fig. 44. A very obtufe rhomboid* Fig. 45. An acute rhomboid. Fig. 46. Approaching to the cube. Fig. 47. Double fix-fided prifm, known by the name of dog-tooth /par. Fig. 48. A fix-fided prifm, terminated at each ex¬ tremity by a trihedral fummit whofe faces are pentagons. Fig. 49. Alfo a fix-fided prifm with trihedral fum- mits; but the bafes of the terminal pentagons are en- Jargedin confequence of the inclination of the lateral faces. Figs, 50, 51, 52. Other forms of calcareous fpar. Fig- 53- Sulphate of lime,—primitive form. Figs. 54. 55. Common forms. Fig. 56. Sulphate of Barytes,—primitive form. Figs- 57? 58, 59- Common forms of fulphate of ba¬ rytes. Fig. 60. Sulphate of Strontites,—-'primitive form. Fig. 61. Common form. F'g. 62. Borate of Soda,—primitive form. Fig. 63. One of the common forms. Fig. 64. Carbonate of Soda,—primitive form, an a- cute oclahedron. Fig- 65. One of the common forms, having two angles at the bafe truncated. Part I. Fig. 66. Nitrate of Votaflo,—primitive form, a reft- Explana- angular oftahedron. tion of the Fig. 67, 68. Common forms. ^ . ^atfcS- ^ Fig. 69. Sulphate of Mcgne/ia,—the common form. Fig. 70, Borateoj Magnejta. Fig. 71. Sulphur,—primitive form. Fig. 72. Common form. Fig. 73. Mercury, Native Amalgam. Fig. 74. Cinnabar. Figs. 75,76, 77. Bed Silver Ore. Figs. 7S, 79, 80, 81, 8 2. Cryfals of Copper Ore. Figs. 83, 84, 85, 86, 87, 88, 90, 91, 92, 93. fall of the Ores of Iron. Fig. 94. Carbonate of Lead. Fig. 95. Sulphate of Lead. Figs. 96, 97. Molybdate of J.ead. Figs. 98, 99, joo. Crystals of Tin. Fig. 101. Oxide of Tjinc. Fig. 102. Sulphuret of Zinc. Fig. 103. Sulphuret of Antimony Figs. 104, 105. Crystals of Cobalt. Fig. xc6. Manganefe. Fig. 107. Sulphuret of Arfenic. Fig. 108. Tellurium,— primitive form. Fig. 109. Common form. Figs. 110, in, 112,. 113. Crystals of Titanium. INDEX. dlcjNTICONE, See Pif azite. ARynolite, Adamantine fpar, Adhtfive flate, Adularia, Agaric mineral, Agate, varieties of, formation of, Ai'im (lone, Alumina, native, Aluminous fchiftus, Amber, Amethyst, Amianthus, Analcime. See Cubizite, Andalu!ite> Anhydrite, Antimony, ores of, Apatite, Arragonite, ArR ionite, Arendalite. See Tifaxite, Argillaceous genus, Arfenic, ores of, AJheflus, Afparagus fone, Augite, Axe-fone, Axinite, A%urite, B. HgryteS) carbonate of, Barytes, fulphate of, p. 161 Barytic genus, 196 Bafalt, 157 Beryl, 183 Rijmuth, ores of, 178 Bitter fpar, 197 Bituminous marl (late, 167 Black lead. See Graphite. 168 Black fchorl, 184 Blende, 181 Bole, 184 Bnlognian fpar, Boracite, 162 Borax, J95 Brown fpar, 176 €. 178 Calamine, Calcareous genus, fpar, fin ter, 201 tufa, 180 Calcedony, 161 Capillary fait, 181 Camelian, 246 Cads eye, 194 . Celefine, 203 Cerite, 153 Cerium, ores of, 193 Chabafe. See CubiAte, 161 Chalk, ’ 177 Chiafolite. See Hollow fpar, Chlorite, 2© 6 Chr it mate ef iron, 205 H2> 243 203 p. 206 Chromium, ores of, lb. C -ysob try l, 188 t rysolite, 159 Chrysoprafe, 240 Cimolite, 202 Cmnabar. See Mercury, 203 Clay, common, 216 pipe, 160 potters, 241 variegated, J91 flaty, 208 indurated, 212 flate, ib. Chnk-fone. See Phonolite, 201 Coal, Cobalt, ores of, 241 Columbium, ores of, J97 Combufibles, clafs of, 199 Copper, ores of 200 mines of 201 Corundum, 167 Crofsfone, 209 Cryolite, 167 Cube fpar, 173 CubiAte, 208 Cyanite, 251 D. ib. Datholite, 178 Diamond, 198 mines of, 180 method of valuing, p, 187 Diamonds, celebrated, 237 mpn 250 15I IJ2 172 I9I 220—221 182 ib. ib. x8fc z8a ib. 285 189 216 243> 244 250 212 225—230 230—231 *51 176 212 206 176 *95 206 148 149 *5« ib. 177 Dolomite^ .1 Index. Dolomite^ Drawing date, Dmerald, Emery, JLpfom fait, Euc/afey F. Feldspar, common, compact, Figure done, Flint, Flints, formation of, theories of, gun, nianufa£lure of, Flinty date, Float done, Fluor, fpar, Foam earth, Fullers earth, Gadeiinite, appendix, Garnet, precious, common, Bohemian, black, Glauber fait, native, Gold, ores of, mines of, Graphite, Green earth, Grenatite, Gun dints, manufa&ure of, Gypfum, H. Hcematites. See Iron ores, Heavy fpar, Heliotrope, Hollow fpar, Hornftone, Horn/lone, fplintery, conchoidal. Hyacinth, Hyalite, Hy dr argillite, I. Egyptian, driped, porcelain, common, agate, opal, Jchth/ophthalmite, Iridium, ore of- See Tlatina. Iron, ores of, p. 202 185 ’59 T57 210 158 178 179 ib. 192 166 166 ib. ib. 16 C 184 204 ib. 201 192 251 134 ib. J53 tb. I54 210 217 -220 216 190 166 204 233> 234 206 172 180 188 164 ib. 165 I51 169 118 171 ib. ib. ib. ib. 172 ib. l8l 217 231 219- M I N E R A L O Lava, Lazulite, Lead, ores of, Lepidolite, Leucite, Lime/lone, Lithomarga, Loam, Lydian done, M. Magne/ia, native, Magnejian genus, Magnetic iron ores, Malachite ore otcopper, Manganefe, ores of, Marbles, varieties of, Marl, Meionite, Melanite, Mellite, Menachanite, Menilite, Mercury, ores of, Mefotype. See Fibrous Zeolite, Mica, Mineral oil. See Fetroleum, pitch, Mineralogy, hidory of, Minerals, cladification of, external characters of, table of, Mountain butter, cork, foap, Muriate of copper,. 237- G Y. p. 189 177 -239 i85 154 198 190 182 l65 24S> N. Native vitriol, alum, Glauber fait, nitre Natrolite, Nephrite, Nickel, ores of, Nigrine, o. Objidian, Olivine, Oolite, Opal, mines of, common, wood, Orpiment, Oftnium. See Platina, Labradore done, Laumonite, L. *79 *77 Palladium. Pearl-fione, Peajlone, Petroleum, Paonolite, Phofphorite, Finite, Pifolite, Pi/laaiite, Puch-Jlone, P. See Platina, 191 ib. 232 228 246 199 202 l8l *54 214 248 170 220—221 *73 j86 213 ib. 129—132 132 133 i45—M7 209 194 190 228 209 ib. 210 ib. *77 *93 244* 243 248 *73 *32 198 169 ib. 170 ib. 247 2x7 217 174 200 213 189 203 186 200 l6l *73 Plafma, Platina, ore of, Plumbago. See Graphite, Polijhing date, Porcelain-earth, Pot-Jlone, Prafe, Prehnite, Pumice, Pyrites, copper, iron, Pyrope, Pyrophyfalite, ^ & Quartz, common, rofy red, Ferruginous, *33 172 217 216 *83 182 186 164 174 ib. 5,26 231 *35 J58 162 163 ib. 163 R. Rhodium. See Platina, 217 Rhomb fpar, 202 Rock crydal, 162 fait, 210 S. Sahlile, 197 Sal ammoniac, 2X1 Salts, clafs of, 209 Sapphire, 156 Scapolite, 180 Schiller-Jlone i 193 Schorl, 160 Schorlite, ib. Schorlous beryl, ib. Sea-froth, 191 Selenite, 205 Semi-opal, 170 Serpentine, 193 Siliceous genus, ' 151 Siliceous fchidus, 165 Silver ores, 2 22—225 Sinter, calcareous, ' 200 Slaty fpar, 201 Smaragdite, 197 Soda, „ 211 Sommite, 181. Specular iron ore, 232- Spine lie, 156 Spodumene, 180 Steatites, 192 Strontian genus, 208 Strontites, carbonate of, ib. fulphate of, ib. Stilbite. See Foliated Zeolite, 175 Sulphur, 2X2 Swine-Jlone, 202 T. Talc, I94i- Tantahum, ores of, 2 50 Tellurium, ores of, 249 Thumer-Jlone. See Axinile, 161 Tin, ores of, 239, 240 Titanium, ores of, 248 Ttpu%, 158 Tourmaline, 1 6q Tremolke,, 256 1'retnohle, Tripoli, Tungjlen, ores of, U. Umber, Uranium, ores of, V. Vefuvian, w. Wacken, p. 196 183 247 190 249 I53 189 MINERALOGY. Waveliite. See Hydr argillite, Wernerite. See ArBi%ite, Whet Hate, Witherite, Wolfram, Wood opal, Wood llone, Y. Yellow earth, Yttrian genus, appendix, p. 178 180 Tjeolite, 185 mealy, 206 fibrous, 247 radiat-d, 170 foliated, 165 Z/w, ores of, "Zircon, 190 Zoyzite, 2il z. Index- p. 175 ib. ib» ib, ib. 241 11S 461 M I N Minerva MINERVA, or Pallas, in Pagan worlhip, the II goddefs of faiences and of wifdom, fprung completely ^ ,in^. t ia. armecj from Jupiter’s brain •, and on the day of her nativity it rained gold at Rhodes. She difputed with Neptune the honour of giving a name to the city of Athens 5 when they agreed that whofoever of them fhould produce what was moft ufeful to mankind, Ihould have that advantage. Neptune, with a ftroke of his trident, formed a h'orfe ; and Minerva caufed ^n olive to fpring from the ground, which was judged to be molt ufeful, from its being the fymbol of j)eace. Minerva changed Arachne into a fpider, for pretending to excel her in making tapeftry. She fought the giants j favoured Cadmus, Ulyffes, and other heroes 5 and refufed to marry Vulcan, choofing rather to live in a ftate of celibacy. She alfo deprived Tirefias of fight, turned Medufa’s locks into fnakes, and per¬ formed feveral other exploits. Minerva is ufually reprefented by the poets, paint¬ ers, and fculptors, completely armed, with a couipofed but agreeable countenance, bearing a golden brealtplate, a fpear in her right hand, and her aegis or fhield in the left, on which is reprefented Medufa’s head encircled with fnakes, and her helmet was ufually entwined with olives. Minerva had feveral temples both in Greece and Italy. The ufual victim offered her was a white hei¬ fer, never yoked. The animals facred to her were the cock, the owl, and the bafililk. M/nf.r vjr Cajlrum, Arx Minervee, Minervium, or Templum Minerva’, in Ancient Geography, a citadel, temple, and town on the Ionian fea, beyond Hydrus; feen a great way out at fea. Now Caftro, a town of Otranto in Naples. E. Long. 19. 25. N. Eat. 46. 8. Minervjb Promontorinm, in Ancient Geography, the feat of the Sirens, a promontory in the Sinus Paeitanus, the fouth boundary of Campania on the Tufcan coaft ; fo called from a temple of Minerva on it 5 fituated to the fouth of Surrentum, and therefore called Surrentium. Now Capo della Minerva, on the weft ’coaft of Naples, over againft the ifland Capri. MINERS ALIA, in Roman antiquity, feftivals 1 celebrated in honour of Minerva, in the month of March 5 at which time the fcholars had a vacation, and ufually made a prefent to their mailers, called from this feftival Minerva/. MINGRELIA, anciently Colchis, a part of Weftern Georgia, in Afia 5 bounded on the eaft by Iberia, or Georgia properly fo called 5 on the weft, bv M I N the Euxine fea; on the fouth, by Afmenia, and part Mingrelia. of Pontus j and on the north, by Mount Caucafus. —;v——> Colchis, or Mingrelia, is watered by a great many rivers j as the Corax, the Hippus, the Cyaneus, the Chariftus, the Phafis, where the Argonauts landed, the Abiarus, the Ciffa, and the Ophis, all emptying them- felyes into the Euxine fea. The Phafis does not fpring from the mountains in Armenia, near the fources of the Euphrates, the Afiaxes, and the Tigris, as Stra¬ bo, Pliny, Ptolemy, Dioriyfius, and after them Arrian, Reland, Calmet, and Sanfon, have falfely aflerted ; but rifes in Mount Caucafus; and flows not from fouth to north, but from north to fouth, as appears from the map of Colchis or Mingrelia in Thevenot’s colle&ion, and the account which Sir John Chardin gives of that country. This river forms in its courfe a fmall ifland called alfo Phajis: whence the pheafants, if Ifidorus is to be credited, were firft brought to Europe, and thence called by the Greeks Phajiani. The other ri¬ vers of Colchis are confiderable. The whole kingdom of Colchis was in ancient times very pleafant and fruitful, as it is ftill where duly cul¬ tivated • abounded in all neceffaries of life ; and was enriched with many mines of gold, which gave occafion to the fable of the Golden Fleece and the Ar- gonautic expedition, fo much celebrated by the ancients. Sir Jonn Chardin tells us, that this country extends above 100 miles in length and 60 in breadth j being not near fo extenfive as the ancient Colchis, which reached from the frontiers of Iberia or Georgia Pro¬ per, weftward to the Palus Maeotis: that it is beau¬ tifully diverfified with hills, mountains, valleys, woods, and plains, but badly cultivated : that there are all the kinds of fruits which are found in England, grow¬ ing wild, but taftelefs and infipid for want of cul¬ ture : that, if the natives underftood the art of ma¬ king wines, thofe of this country would be the fineft in the world : that there are many rivers which have their fource in Mount Caucafus, particularly the Pha¬ fis, now called the Rione: that the country abounds in beeves, hogs, wild boars, flags, and other venifon j and in partridges, pheafants, and quails : that falcons, eagles, pelicans, lions, leopards, tygers," wolves, and jackals, breed on Mount Caucafus, and fometimes greatly annoy the country : that the people are general¬ ly handlome, the men ftfong and well made, and the women very beautiful ; hut both fexes very vicious and debauched : that they marry their nieces, aunts, or other relations, indifferently j and take two or three wives MIN [2 Mingreha. w;Ves if they pleafe, and as many concubines as they y- will : that they not only make a common practice of felling their children, but even murder them, or bury them alive, vvhen they find it difficult to bring them up : that the common people ufe a fort of pafte, made of a plant called ,§w«, inflead of bread 5 but that of the better fort confifls of wheat, barley, or rice : that the gentry have an abfolute power over their vaffals, which extends to life, liberty, and eftate : that their arms are the bow and arrow, the lance, the fabre or broad- fword, and the buckler: that they are very nafly, and eat fitting crofs-legged upon a carpet, like the Perfiansj but the poorer fort upon a mat or bench, in the fame pofture : that the country is very thin of inhabitants, no lefs than 1 2,000 being fuppofed to be fold yearly to the Turks and Perfians: that the principal commodities exported from it are, honey, wax, hides, caftor, martens fkms, flax feed, thread, filk, and linen cloth j but that there are no gold or filver mines now, and very little money : that the revenue of the prince or viceroy amounts to about 20,000 crowns per annum : that the inhabitants call themfelves Chrijlians; but that both they and their priefts are altogether illiterate, and igno¬ rant of the doftrines and precepts of Chriftianity: that 7 ] MIN their bifhops are rich, have a great number of vaflals, and are clothed in fcarlet and velvet: and that their fervice is according to the rites of the Greek church, with a mixture of Judaifm and Paganifm. T. he cities of moft note in this country in ancient times were Pityus ; Diofcurias, or Diofcorias, which was fo called from Caftor and Pollux, two of the Ar¬ gonauts, by whom it is fuppofed to have been found¬ ed, and who in Greek are ftyled Diofcuroi, at prefent known by the name of Savatapoh ; Aea on the Phaus, fuppofed to be the fame as Hupolis; Phafts, fo called from the river on which it flood ; Cyta, at the mouth of the river Cyaneus, the birth place of the famous Medea, called from thence, by the poets, Cytceis; Sa- racae, Zadris, Sarinm, Madia, and Zoliffa. As for modern cities, it does not appear that there are any here confiderable enough to merit a defcription j or, if there are, they feem to be little, if it all, known to Europeans. MINHO, a great river in Spain, which taking its rife in Galicia, divides that province from Portugal, and falls into the Atlantic at Caminha. MINIATURE, in a general fenfe, fignifies repre- fentation in a fmall compafs, or lefs than the reality. Mink*, Miniature. MINIATURE PAINTING; A DELICATE kind of painting, confifting of little points or dots ; ufually done on vellum, ivo¬ ry, or paper, with very thin, Ample, water colours.— The word comes from the Latin minium, “ red lead j” that being a colour much ufed in this kind of painting. The French frequently call it tnignature,' from mignon, “ fine, pretty,” on account of its fmallnefs and deli¬ cacy : and it may be ultimately derived from tux-ros « fmall.” Miniature is diftinguifhed from other kinds of paint- ing by the fmallnefs and delicacy of its figures and faintnefs of the colouring ; on wdiich account it re¬ quires to be viewed very near. Sect. I. Of Drawing and Defgning. To fucceed in this art, a man fliould be perfe&ly fkilled in the art of defigning or drawing : but as moft people who aftefl the one, know little or nothing of the other, and would have the pleafure- of painting without giving themfelves the trouble of learning to defign (which is indeed an art that is not acqpired without a great deal of time, and continual applica- t on), inventions have been found out to fupply the place of it 5 by means of which a man defigns or draws without knowing how to defign. The firft is chalking : that is, if you have a mind to do a print or defign in miniature, the backfide of it, on another paper, muft be blackened with fmall coal, and then rubbed very hard with the finger w-rapped in a linen cloth : afterwards the cloth muft be lightly drawn over the fide fo blackened that no black grains may remain upon it to foil the vellum you would paint upon ; and the print or draught muft be faftened upon the vellum with four pins, to keep it from Shifting. V-OL. XIV. Part I. * And if it be another paper that is blackened, it muft be put between the vellum and the print, or draught, with the blackened fide upon the vellum. Then, with a blunted pin or needle, you muft pafs over the princi¬ pal lines or ftrokes of the print, or draught, the con¬ tours, the plaits of the drapery, and over every thing eife that muft be diftinguiftied ; prefling fo hard, that the flrokes may be fairly marked upon the vellum un¬ derneath. Copying by fquares is another convenient method for fuch as arc but little Ikilled in the art of defigning, and would copy pidlures, or other things, that cannot be chalked. The method is this; The piece muft be divided into many equal parts by little fquares, mark¬ ed out with charcoal, if the piece be clear and whitifli, and the black can be fairly feen upon it; or with white chalk, if it be too brown and dulky. After which, as many fquares of equal dimenfions muft be made on white paper, upon which the piece muft be defigned 5 becaufe, if this be done immediately upon vellum, (as one is apt to mifearry in the firft attempt), the vellum may be foiled with falfe touches. But vvhen it is neatly done upon paper, it muft be chalked upon the vellum in the manner before deferibed. When the original and the paper are thus ordered, obferve what is in each fquare of the piece to be defigned ; as a head, an arm, a hand, and fo forth j and place it in the correfpond- ing part of the paper. And thus finding where to place all the parts of the piece, you have nothing to do but to form them well, and to join them together. By this method you may reduce or enlarge a piece to what compafs you pleafe, making the fquares of your paper greater or lefs than thofe of the original ; but they muft always be of an equal number. To copy a picture, or other thing, in the fame fize K k and 258 MINIATURE Drawing and propCLtion, another method is, to make ufe of ran<^ varnkhed paper, or of the fkin of a hog’s bladder, very ■ tranfparent, fuch as is to be had at the gold-beaters. Talc or ilinglafs will likewife do as well. Lay any one of thofe thing* upon your piece ; through it you will fee all the ftrokes and touches, which are to be drawn upon it with a crayon or pencil. Then take it off; and fattening it under paper or vellum, fet up both againft the light in the manner of a window j and with a crayon, or a filver needle, mark out upon the paper or vellum you have put uppermoft, all the lines and touches you fhall fee drawn upon the varnifhed paper, bladder, talc, or ifinglafs, you have made ufe of, and which will plainly appear through this window. After this manner, making ufe of the window, or of glafs expofed to the light, you may copy all forts oi prints, defigns, and other pieces on paper or vellurn : laying and faftening them under the paper or vellum upon which you tvould draw them. And it is a very good and a very eafy contrivance for doing pieces of the fame fize and proportion. If you have a mind to make pieces look another way, there is nothing to be done but to turn them ; laying the printed or drawn fide upon the glafs, and fattening the paper or vellum upon the back of it 5 re¬ membering to let your lights fall on the left fide. A good method likewife to take a true copy of a picture in oil, is to give a touch of the pencil upon all the principal ftrokes, with lake tempered with oil 5 and to clap upon the wrhole a paper of the fame fize : then palling the hand over it, the touches of the lake will flick and leave the defign of your piece expreffed upon the paper, which may be chalked like other things, But you muft remember to take oft’ with the crumb of bread what remains of the lake upon the pilfture be¬ fore it be dry. You muft likewife make ufe of pounce, made of powdered charcoal put in a linen rag ; wnth wdrich the piece you would copy muft be rubbed, after you have pricked all the principal ftrokes or touches, and faften- ed white paper or vellum underneath. When the piece is marked out upon the vellum you muft pafs with a pencil of very clear carmine over all the traces, that they may not be effaced as you work : then clean your vellum with the crumb of bread, that no black may remain upon it. The vellum muft be pafted upon a plate of brafs or wood, of the fize you would make your piece, to keep it firm and tight. But this palling muft: be on the edges of your vellum only, and behind the plate, for wffich purpofe your vellum muft exceed your plate above an inch on every fide j for the part you paint upon muft never be pafted ; becaufe it would not only give it an ill look, but you could not take it off if you would. Cut off the little (hags and locks of the vellum ; and svetting the fair fide with a linen cloth dipped in wrater, clap the other upon the plate with a clean paper be¬ tween them : fo much as hangs over muft be pafted upon the back of the plate, drawing it equally on all fides, and hard enough to ftretch it well. Sect. II. Of Materials. The chief colours made ufe of for painting in minia¬ ture are, PAINTING. Sea. II. Carmine. Coiours, Venice and Florence lake. , &,c' j Rofe pink. Vermilion. Red lead. Brown red. Red orpiment. Ultramarine. Verditer. Indigo. Gall ftone. Yellow ochre. Dutch pink. Gamboge. Naples yellow’. Pale mafticot. Deep yellow mafticot. Ivory black. Lamp black. True Indian ink. Biftre, or wood foot. Raw umber. Burnt umber. Sap green. Verdigris. Flake white. Crayons of all colours. Gold and filver (hells. Leaf gold and leaf filver. The feven tranfparent colours, which are ufed where writing is feen through the colour. ' Lake. Blue. Y ellow. Liquid ^ Grafs-green. Dark-green. Purple colour. Brown. Mod of thefe colours neceffary for miniature paint¬ ing may eafily be prepared by attending to the direc¬ tions given under the article CoLot/R-Making. As colours taken from earth and other heavy mat¬ ter are always too coarfe be they never fo well ground, efpecially for delicate work, becaufe of a certain fand remaining in them j the fineft parts may be drawn out by diluting them with the finger in a cup of water. When they are well fteeped, let them fettle a while : then pour out the cleareft, which will be at top, into another veffel. This will be the fineft, and muft be let dry; and when it is ufed, muft be diluted with gum water. If you mix a little of the gall of an ox, a carp, or an eel, particularly of the laft, in green, black, gray, yellow, and brown, colours, it will not only take a- way their greafy nature, but alfo give them a luftre and brightnefs they have not of themfelves. The gall of eels muft be taken cut when they are (kinned, and hung upon a nail to dry ; and when you would ufe it, it muft be diluted with brandy 3 add a little of it mix¬ ed with the colour you have diluted already. This likewife makes the colour (lick better to the vellum, which it hardly dees when it is greafy : moreover, this gall hinders it freni fealing. Some Sea. I Colours, MINIATURE PAINTING, Some colours are made clearer by fire ; as yellow ochre, brown red, ultramarine, and umber : all others are darkened by it. But if you heat the laid colours with a fharp fire, they change ; for the brown red be¬ comes yellow ; yellow ochre becomes red ; umber red¬ dens alfo. Cerufs by fire takes the colour of citron, and is often called majlicot. Obferve, that yellow ochre heated, becomes more tender than it was, and fofter than brown red. Likewife brown red heated becomes fofter than fine yellow ochre* Both are very proper. The finefl and truelt ultramarine, heated upon a red- hot iron, becomes more glittering 5 but it wafles, and is coarfer and harder to work with in miniature. All thefe colours are diluted in little cups of ivory, made on purpofe, or in fea (hells, with water in which gum arable and fugarcandy are put. For inftance, in a glafs of water put a piece of gum as big as a wal¬ nut, and half that quantity of fugarcandy. This laft hinders the colours from fealing when they are laid on, which they generally do when they want it, or the vellum is greafy. This gum water mull; be kept in a neat bottle cork¬ ed •, and you never mull: take any out of it with a pen¬ cil that has colour upon it, but with a quill or fome luch thing. Some of this water is put in the (hell with the co¬ lour you would temper, and diluted with the finger till it be very fine. If it be too hard, you mull let it foften in the (hell with the faid water before you di¬ lute it. Afterwards let it dry ; and do thus with every colour, except lily-green, fap-green, and gamboge, which mull: be tempered with fair water only. But ul¬ tramarine, lake, and biftre, are to be more gummed than other colours. If you make ufe of fea {hells, you muft let them fxeep two or three days beforehand in water: then cleanfe them in boiling hot water, mixed with vinegar, in order to carry off a certain fait, which otherwile flicks to them, and fpoils the colours that are put to them. To know whether colours are fufficiently gummed, you have nothing to do but to give a flroke of the pen¬ cil upon your hand when they are diluted, which dri'es immediately : if they chap and fcale, there is too much gum \ if they rub out by palling the finger over them, there is too little. It may be feen likewife when the colours are laid on the vellum, by paffmg the finger over them. If they (tick to it like a powder, it is a fign there is not gum enough, and more mull be put to the water with which you temper them : but take care you do not put too much ; for that makes the co¬ lour extremely hard and dry. It may be known like- wife by their glueinefs and brigbtnefs : fo the more they are gummed, the darker they paint ; and when you have a mind to give a greater llrength to a colour than it has of itfelf, you have nothing to do but to ^give it a great deal of gum. Provide yourfelf with an ivory pallet, very fmooth, as big as your hand ; on one fide of which the colours for the carnation, or naked parts of a pifture, are to be ranged in the following manner. In the middle put a great deal of white, pretty largely fpread ; becaufe it is the colour molt made ufe of: and upon the edge, rrom the left to the right, place the following colours at a little diifance from the white. Mallicot. Dutch pink. Orpiment. Yellow ochre. Green ; compofed of verditer, Dutch pink, and white, in equal quantities. Blue *, made of ultramarine, indigo, and white, to a great degree of palenefs. Vermilion. Carmine. Biftre, and Black. On the other fide of the pallet, fpread fome white in the fame manner as for the carnation. And when you have a mind to paint draperies, or other tilings, place near the white the colour you would make than of, in order to work, as (hall be fhown hereafter. The ufe of good pencils is a great matter. In or¬ der to make a good choice, wet them a little ; and if the hairs keep clofe together as you turn them upon the finger, and make but one point, they are good : but if they clofe not together, but make feveral points, and fome are longer than others, they are good for nothing. When they are too fharp pointed, with only four or five hairs longer than the reft, yet clofing all together, they are, notwithftanding, good; but they' muft be blunted with a pair of feiffars, taking care at the fame time you do not clip away too much. It is proper to have two or three forts of them ; the largeft for laying the grounds and dead colouring, and the fmalleft for finilhing. To bring the hairs of your pencil to join clofe to¬ gether and make a good point, you muft often put the pencil juft between your lips when you are at work j moiftening and prefling it clofe with the tongue, even when there is colour upon it; for if there be too much, fome of it is taken off by this means, and enough left for giving fine and equal touches. You need not ap¬ prehend this will do you any harm. None of the co¬ lours for miniature, except orpiment, when they are prepared, have either ill tafte or ill quality. This ex¬ pedient muft efpecially be ufed for dotting, and for fi- nifhing, particularly the naked parts of a pifture, that the touches may be neat and fair, and not too much charged with colour. As for draperies and other things, as well in dead colouring as in finifhing, it is fufficient, in order to make the hairs of your pencil join well, and to unload it when it has too much co¬ lour, to draw it upon the edge of the ftiell, or upon the paper you muft put upon your work to reft your hand on, giving fome ftrokes upon it before you work upon your piece. To work well in miniature, you muft do it in a room that has but one window, and fix yourfelf very near it, with a table and delk almoft as high as the' window ; placing yourfelf in fuch a manner, that the light may always come in on l*e left fide, and never forward or on the right. When you would lay a colour on all parts equally ftrong, as for a ground, you muft make your mixtures in Ihells, and put in enough for the thing you defign to paint for if there be not enough, it is a great chance but the colour you mix afterwards is too dark or too iight. K k a Sect. 26o MINIATURE Of Wo^ing-, Sect. III. Of Working. Afier having fpoke of vellum, pencils, and colours, let us now fhow how they are to be employed. In the hrft place, then, when you would paint a piece, be it carnation, drapery, or any thing elfe, you mult begin by dead-colouring j that is to fay, by laying your co¬ lours on with liberal ftrokes of the pencil, in the imootheft manner you can, as the painters do in oil ; not giving it all the force it is to have for a finilhing j that is, make the lights a little brighter, and the (trades lefs dark, than they ought to be j becaufe in dotting upon them, as you muit do after dead-colouring, the colour is always fortilied, and would at laft be too dark. There are feveral wrays of dotting ; and every painter has his owm. Some make their dots perfedtly round y others make them a little longifh ; others hatch by little ftrokes that crofs each other every way, till the work appears as if it had been wrought wuth dots. This laft method is the beft, the boldeft, and the foon- eft done : wherefore fuch as would paint in miniature ought to ufe it, and to inure themfelves from the firft to dot in the plump and the foft way j that is to fay, where the dots are loft, in a manner, in the ground upon which you work, and only fo much appears as is lufficlent to make the work feem dotted. The hard and the dry w’ay is quite the reverfe, and always to be avoided. This is done by dotting with a colour much darker than your ground, and when the pencil is not moiftened enough with the colour, which makes the work feem rough and uneven. Study likewife carefully to lofe and drowm your co¬ lours one in another, fo that it may not appear where they disjoin j and to this end, foften or allay your touches rvith colours that partake of both, in fuch fort that it may not appear to be your touches which cut and disjoin them. By the word cut, wre are to under- ftand what manifeftly feparates and divides, and does not run in and blend itfelf with the neighbouring co¬ lours } which is rarely praftifed but upon the borders of drapery. When your pieces are finifhed, to heighten them a little, give them a fine air ; that is to fay, give, upon the extremity of the lights, fmall touches with a co¬ lour yet lighter, which muft be loft and drowned wdth the reft. When the colours are dry upon your pallet or in your ftielh, in order to ufe them, they muft be diluted with water. And when you perceive they want gum, which is feen when they eafily rub off the hand or the vellum if you give a touch with them upon either, they muft be tempered with gum water inftead of pure wa¬ ter, till they are in condition. There are feveral forts of grounds for pidftures and portraitures. Some are wholly dark, compofed of biftre, umbre, and G >logn earth, with a little black and white ; others more yellow, in which is mixed a great deal of ochre •, others grayer, which partake of indigo. In order to paint a ground, make a wafti of the colour or mixture you would have it, or according to that of the p’nfture or portraiture you vzould copy ; that is to fay, a very light lay, in which there is hardly any thyig but water, in order to foak the vellum,. PAINTING. Sea. III. Then pafs another lay over that, fomewhat thicker, and ^ Of ftrike it on very fmoothly with large ftrokes as quick ^ Q'Ring. ^ as you can, not touching twice in the fame place be¬ fore it be dry •, becaufe the fecond ftroke carries off what has been laid on at the firft, efpeciallv when you lean a little too light upon the pencil. Other dark grounds are likewife made of a colour a »* little greenifti ^ and thofe are moft in ule, and the pro- pereft to lay under all forts of figures and portraitures j becaufe they make the carnation, or naked parts of a pidfture, appear very fine •, are laid on very eaiily, and there is no occafion to dot them, as one is often obli¬ ged to do the others, which are rarely made fmooth and even at the firft 5 whereas in thefe one leidom fails of fuccefs at the firft bout. To make them, you muft mix black, Dutch pink, and white, all together : more or lefs of each colour, according as you would have them darker or lighter. You are to make one lay very light, and then a thicker, as of the firft grounds. You may alfo make them of other colours, if you pleafe j but thefe are the moft common. When you paint a holy perfon upon one of thefe grounds, and would paint a fmall glory round the head of your figure, you muft not lay the colour too thick in that part, or you may even lay none at all, efpecially where this glory is to be very bright; but lay for the firft time with white and a little ochre mixed together, of a fufficient thicknefs ) and in pro¬ portion as you go from the place of the head, put a little more ochre 5 and to make it lofe itfelf, and die away with the colour of the ground, hatch with a free ftroke of the pencil, following the round of the glory fometimes with the colour of which it is made, and fometimes with that of the ground, mixing a little white or ochre with the laft when it paints too dark to work with : and do this till one be infenfibly loft in • another, and nothing can be feen to disjoin them. To fill an entire ground with a glory, the brighteft part is laid on with a little ochre and white, adding more of the firft in proportion as you come nearer the edges of the picture: and when the ochre is not ftrong enough (for you muft always paint darker and darker), add gall ftone, afterwards a little carmine, and laftly biftre. This firft laying, or dead colouring, is to be made as foft as poftible ; that is to fay, let thefe (ha- dowings lofe themfelves in one another without gap or interfedion. Then the way is to dot upon them with the fame colours, in order to drown the whole toge¬ ther ^ which is pretty tedious, and a little difficult, eipecially when there are clouds of glory on the ground. Their lights muft be fortified in proportion as you remove from the figure, and finiilied as the reft, by dotting and rounding the clouds ; the bright and obfcure parts of which muft run infenfibly into one another. For a day Iky, take ultramarine and a good deal of white, and mix them together. With this make a lay, as (mooth as you can, with a large pencil and libexal ftrokes, as for grounds } applying it paler and paler as you defcend towards the horizon j which mull be done with vermilion or red lead, and with white of the fame ftrength with that where the fky ends, or fometbing lefs ; making this blue lofe itfelf in the red, which you bring down to the Ikivts of the earth, or tops of houfes 5 mixing towards the end gall ftone and 3; Sea. IV. MINIATURE PAINTING. 26f Of a good deal of white, in fuch a manner that [the mix- Working. ture paier than the former, without any vifible ’rr” ^ interfedlion or parting between all thefe colours of the Iky. W! ren there are clouds in the Iky, you may fpare the places where they are to be ; that is to fay, you need not lay on any blue there, but form them, if they are reddifh, with vermilion gall flone, and white, with a little indigo j and if they are more upon the black, put in a good deal of the lafl ; painting the lights of one and the other with mafticot, vermilion, and white, more or lefs of any of thefe colours, according to the flrength you would give them, or according to that of the original you copy j rounding the whole as you dot) for it is a difficult matter to lay them very irnooth at the firft painting : and if the Iky is not even enough, you muft dot it alfo. It is at your pleafure to exempt the places of the clouds, for you may lay them upon the ground of the fky heightening the bright parts by putting a good deal of white, and fortifying the fliadows by uling lefs. This is the ffiorteft way. A night or ftormy Iky, is done with indigo, black, and white, mixed together j which is laid as for a day Iky. To this mixture muft be added ochre, vermi¬ lion, or brown red, for the clouds; the lights of which are to be of mafticot or red lead, and a little white, now redder, now yellower, at difcretion. And when it is a tempeftuous Iky, and lightning appears in fome places, be it blue or red, it is to be done as in a day Iky, drowning and loling the whole together at the firft forming or dead colouring, and at the finiftiing. Sect. IV. Of Draperies. To paint a blue drapery, put ultramarine near the white upon your pallet j and mix a part of the one with th$ other, till it makes a fine pale, and has a body. With this mixture you muft form the brighteft parts ; and then adding more ultramarine, form fuch as are darker *, and go on after this manner till you come to the deepeft plaits and the thickeft lhades, where you muft lay pure ultramarine : and all this muft be done as for a firft forming or dead colouring ; that is to fay,, laying the colour on with free ftrokes of the pencil, yet as fmooth as you can ; lofing the lights in the flia¬ dows with a colour neither fo pale as the light nor fo dark as the fliades. Then dot with the fame colour as in the firft forming, but a fmall matter deeper ; that the dots may be fairly feen. All the parts muft be drowmed one in another, and the plaits appear with¬ out interfeftion. When the ultramarine is not dark enough to make the deeper fliadows, how well foever it be gummed, mix a little indigo with it to finifli them. And when the extremities of the lights are not bright enough, heighten them with white and a very little ultramarine. A drapery of carmine is done in the fame manner as the blue ; except that in the darkeft places there is to be a lay of pure vermilion, before you dead colour with carmine, which muft be applied at top j and in the ftrongeft fliades, it muft be gummed very much. To deepen it the more, mix a little biftre with it. There is likewife made another red drapery, which Of is firft drawn with vermilion, mixing white with it DraPenes- to dead colour the bright places, laying it pure and unmixed for thofe that are darker, and adding car¬ mine for the grand ftiades. It is finiftied afterwards, like other draperies, with the fame colours. And when the carmine with the vermilion do not darken enough, work with the firft alone, but only in the deepeft ot the ftiades. t A drapery of lake is made in the fame manner with that of carmine ; mixing a good deal of white with it for the bright places, and very little for thofe that are dark. It is finiflied likewife with dotting 5 but you have nothing to do with vermilion in it. Violet draperies are likewife done after this manner j after making a mixture of carmine and ultramarine, putting always white for the bright parts. If you would have your violet be columbine or dove colour, there muft be more carmine than ultramarine : but if you would have it bluer and deeper, put more ultra- marine than carmine. A drapery is made of a flefti colour, beginning with a lay made of white, vermilion, and very pale lake j and making the ftiades with the fame colours, uling lefs wffiite in them. This drapery muft be very pale and tender, becaufe the fluff of this colour is- thin and light $ and even the ftiades of it ought not to be deep. To make a yellow drapery, put a lay of mafticot over all j then one of gamboge upon that, excepting the brighteft places, where the mafticot muft be left entire ) the dead colour with- ochre, mixed with a little gamboge and mafticot, putting more or lefs of the laft according to the ftrength of the ftiades. And when, thefe colours do not darken enough, add gall ftone. And gall ftone pure and unmixed is uled for the thickeft fliades ; mixing a little biftre with it, if there be occafion to make them ftill darker. You finifli by dotting with the fame colours you dead- coloured with, and lofing the lights and the ftiades in one another. If you put Naples yellow, or Dutch pink, in lieu of mafticot and gamboge, you will make another fort of yellow. The green drapery is made by a general lay of ver* diter ; with which, if you find it too blue, mix mafti¬ cot for the lights, and gamboge for the fliades. After¬ wards add to this mixture lily-green or fap-green, to ftiadow7 with ; and as the ftiades are thicker, put more of thefe laft greens, and even work with them pure and unmixed v/here they are to be extremely dark. You finifti with the fame colours, a little darker. By putting more yellow7, or more blue, in thefe co¬ lours, you may make different forts of green as you pleafe. To make a black drapery, you dead colour with black and white, and finilh with the fame colour, put¬ ting more black as the lhades are thicker; and for the darkeft, mix indigo with it, efpecially when you would have the drapery appear like velvet. You may always give fome touches with a brighter colour, to heighten the lights of any drapery whatfoever. A white woollen drapery is made by a lay of whitej, in which there muft be a very fmall matter of ochre,,, orpimentj or gall ftone, that it may look a little yel* lewilL. 262 MINIATURE PAINTING. Sefl. IV Of low!Hi. Tlien dead-colour, and finifh the diades with ,Dr.ipenes. [)]ue) a little black, white, and bihre j putting a great ” deal of the laft in the darkefl. The light gray is begun with black and white, and finiihed with the fame colour deeper. For a brown drapery, make a lay of bifire, white, and a little brown red ; and ihadow with this mixture, made a little darker. There are other draperies, called variable, becaufe the lights are of a different colour from the fhades. Thefe are moftly ufed for the veilments of angels, for young and gay people, for fcarfs and other airy attire, admitting of a great many folds, and flowing at the pleafure of the wind. The moft common are the violets : of which they make two forts j one, where the lights are blue j and the other, where they are yellow. For the firfl, put a lay of ultramarine and very pale white upon the lights j and fhadow with carmine, ul¬ tramarine, and white, as for a drapery wholly violet; fo that only the grand lights appear blue. Yet they muff be dotted with violet, in which there is a great deal of white, and loft infenfibly in the fhades. The other is done by putting upon the lights only, inftead of blue, a lay of mafticot 5 working the reft as in the drapery all violet, excepting that it muft be dotted, and the light parts blended with the fha- dowy, that is, the yellow with the violet, with a little gamboge. The carmine red is done like the laft ; that is, let the lights be done with mafticot, and the fhades with carmine; and to lofe the one in the other, make ufe of gamboge. The lake red is done like that of carmine. The green is done as the lake : always mixing ver- diter with lily or fap green, to make the fhades ; which are not very dark. Several other forts of draperies may be made at dif- cretion, always taking care to preferve the union of the colours, not only in one fort of cloth or fo, but alfo in a group of feveral figures; avoiding, as much as the fubjedf will allow, the putting of blue near the colour of fire, of green againft black j and fo of other colours which cut and disjoin, and whofe union is not kind enough.. Several other draperies are made of foul colours, as brown red, biftre, indigo, &c. and all in the fame manner. Likewife of other colours, fimple and com¬ pound ; the agreement between w’hich is always to be minded, that the mixture may produce nothing harfh and difagreeable to the eye. No certain rule can be laid down for this. The force and effedl of your co¬ lours are only to be known from ufe and experience, and you mult work according to that knowledge. Linen cloths are done thus : After drawing the plaits or folds, as is done in a drapery, put a lay of white over all; then dead colour, and finifh the fhades with a mixture of ultramarine, black, and white, uung more or lefs of the laft, according to their ftrength or tendernefs •, and in the greateft deepenings put biftre, mixed with a little white; giving only fome touches of this mixture, and even of pure biftre, upon the extremities of the greateft Shadows, where the folds muft; be drawn, and loft with the reft, 2 They may be done in another manner, by making Of a general lay of this mixture of ultramarine, black, G*apene'. and very pale white ; and dead colour (as has been faid v before^) with the fame colour, but a little deeper. And when the (hades are dotted and finifhed, heighten the lights with pure white, and lofe them with the deep¬ enings of the linen. But of whatever fort you make them, when they are finiihed, you muft give a yellovvilh teint of orpiment and white to certain plases; laying it lightly on, and as it were in water j fo that what is underneath may, notwithftanding, plainly appear, as well the fhadows as the dotting. Yellow linen cloth is done by putting a lay of white, mixed with a little ochre. Then form and finifh the (hades' with biftre, mixbd with white and ochre •, and in the thickeft fhades ufe pure biftre ; and before you finhh, give fome teints here and there of ochre and white, and others of white and ultramarine, as well upon the fhades as the lights j but let them be very bnght: and drown the whole together in dotting, and it will look fiaely. As you finifh, heighten the extre¬ mities of the lights with mafticot and white. You may add to this fort of linen, as well as to the white, cer¬ tain bars from fpace to fpace, as in Turkey mantuas; that is, fmall ftripes blue and red with ultramarine and carmine 5 one of red between two of blue, very bright and clear upon the lights, and deeper upon the fhades. Virgins are pretty often dreffed with veils of this fort (by Popifh painters), and fcarfs of this kind are put about necks that are bare j becaufe they become the teint mighty well. If you would have both thefe forts of linen tranfpa- rent, and the fluff or other thing that is beneath ap¬ pear through them, make the firft lay for them very light and clear, and mix in the colour to fhadow with, a little of that rvhich is underneath, efpecially towards the end of the fhades j and only do the extremities of the lights, for the yellow, with mafticot and white ; and for the white, with pure white. They may be done in another manner, efpecially when you would have them altogether as clear as muf- lin, lawn, or gauze. To this end form and finifh what is to be beneath, as if nothing was to be put over it. Then mark out the light and clear folds with white or mafticot ; and a fhadowy with biftre and white, or with black, blue, and white, according to the colour you would make them of j making the reft fomewhat faint¬ er : yet this is not neceffary but for the parts that are not to be fo clear. Crape is done the fame way j excepting that the folds of the fhades and the lights, and the borders too, are to be marked out with little filaments of black up¬ on what is underneath j which is likewife to be finifhed beforehand. When you ivould make a fluff like a watered tabby, make the waves upon it -with a colour a lit¬ tle lighter, or a little darker, in the lights and the fhades. There is a manner of touching draperies which di- ftinguifhes the filken from the woollen. The laft are more terreftrial and fenfible ; the others more light and fading. But it muft be obferved, that this is an effefl which depends partly upon the fluff and partly upon the colour 5 and for the employing thefe in a manner fuitable to the fubje&s and the deepenings of painting, Sea, TV. M X N I A T U It Of painting, we fliall here touch upon their different qua- lities. v~~~"J We have no colour which partakes more of light, nor which comes nearer the air, than white; which fhows it to be fickle and fleeting. It may, neverthelefs, be held and brought to by lome neighbouring co¬ lour, more heavy and fenlible, or by mixing them to¬ gether. Blue is a mod fleeting colour : and fo we fee, that the Iky and the remoteft views of a piilure are of this colour j but it will become lighter and fickler in pro¬ portion as it is mixed with white. Pure black is the heavieft and moil terreflrial of all colours *, and the more of it you mix with others, the nearer you bring them to the eye. Neverthelefs, the different difpofitions of black and white make; alfo their effe£!s different : for white often makes black difappear, and black brings white more into view 5 as in the refleftion of globes, or other fi¬ gures to be made round, wdrere there are always parts that fly as it wTere from the eye, and deceive it by the craft of art : and under the white are here comprehend¬ ed all the light colours j as under the black, all the heavy colours. Ultramarine is then foft and light. Ochre is not fo much fo. Maflicot is very light j and fo is verditer. Vermilion and carmine come near this quality. Orpiment and gamboge not fo near. Lake holds a certain mean, rather foft than rough. Dutch pink is an indifferent colour, eafily taking the quality of others. So it is made terreftrial by mixing it with colours that are fo ; and, on the con¬ trary, the moft light and fleeting by joining it with white or blue. Brown red, umber, dark greens, and biftre, are the heavieft and moft terreftrial, next to black. Skilful painters, who underftand perfpe&ive, and the harmony of colours, always obferve to place the dark and fenftble colours on the fore parts of their piftures ; and the moft light and fleeting they ufe for the diftances and remote views. And as for the union of colours, the different mixtures that may be made of them will learn, you the friendfhip oi antipathy they have to one another. And upon this you muft take your meafures for placing them wttct fuch agreement as fhall pleafe the eye. For the doing of lace, French points, or other things of that nature, put over all a lay of blue, black, and white, as for linen : then heighten the tlowerwork with pure white : afterwards make the (hades above with the fi.rft colour, and finifti them with the fame. When they are upon the carnation or naked parts of a pidlure, or upon any thing elfe that you would fhow through an¬ other, finifti what is beneath, as if nothing was to be put over it : and at top, make the points or lace with pure white, fhadowing and finifhing them with the other mixture. If you would paint a fur, you muft begin with a kind of drapery, done, if it be dark, with biftre and white, making the ftiadowings of the fame colour, with lefs white. If the fur be white, do it with blue, white, and a little biftre. And when this beginning, or firft forming, is done, inftead of dotting, draw fmall ftrokes, turning, now in one manner, now in another, accord- 205' E PAINTING. ing to tne coarfe and ftatting of the hair. Heighten Of the lights ot dark furs with ochre and white, and of the Carnations, other with white and a little blue. ——y—j For doing a building, if it be of ftone, take indigo, biftre, and white, with which make the beginning or firft form of it : and for thadowing it, put lefs of this laft j and more biftre than indigo, according to the co¬ lour of the ftone you would paint. To thefe you may likevvile add a little ochre, both for the forming and the finifhing. But to make it finer, you muft give, here and there, efpecially for old fabrics, blue and yellow teints, fome with ochre, others with ultramarine, mixing always white with them, whether before the firit forming, provided they appear through the draught, or whether upon it, lofing or drowning them with the reft when you finilh. When the building is of wood, as there are many forts, it is done at difcretion 5 but the moft ordinary way is to begin or firft form with ochre, biftre, and white, and finilh without white, or with very little j and if the ftiades- are deep, with pure biftre. In the other they add fometimes vermilion, fometimes green or black j in a word, juft according to the colour thev would give it; and they finifli with dotting, as in dra¬ peries and every thing elfe. Sect. V. Of Carnations, or the naked parts of a Painting. There are in carnation fo many different colour¬ ings, that it would be a difficult thing to give general rules upon fo variable a fubjeft. Nor are they mind¬ ed, when one has got, by cultom and praftice, lome habit of working eaiily : and fuch as are arrived ta this degree, employ themfelves in copying their ori¬ ginals, or elfe they work upon their ideas, without knowing how : infomuch, that the moft fkilful, who do it with lefs reflexion and pains than others, would likewife be more put to it to give an account of their maxims and knowledge in the matter of painting, if they were tb he afked what colours they made ufe of for fuch and fuch a colouring, a teint here, and another there. Neverthelefs, as beginners wxmt fome inftruiftion at the firft, wTe wflll ftiew in general after what manner fe- veral carnations are to be done. In the firft place, After having drawn your figure with carmine, and ordered your piece, apply for wm- men and children, and generally for all tender colour¬ ings, a lay of white, mixed with a verv little of the blue made for faces, of which we have told the compo- fition $ but let it hardly be feen. And for men, inftead of blue, they put in this firfl lay a little vermilion j and when they are old, a little ochre is mixed wdth it. Afterwards follow all the traces with vermilion, carmine, and white, mixed together; and begin all the fhades with this mixture, adding white in propor¬ tion as they are weaker 5 and putting but little in the darkeft, and none, in a manner, in certain places where ftrong touches are to be given : for inftance, in the corner of the eye ; under the nofe •, at the ears 5 under the chin ; in the reparations of the fingers j in all joints j at the corners of the nails j and generally in every part where you-would mark out reparations in 264 MINIATURE Of In fiiades that are obfcure. Neither need you fear to Carnations. gjve to thofe places all the force and ftrength they ^ ought to have as foon as you begin or firft form them, becaufe in working at top with green, the red you have put there is always weakened. After having begun, or firll formed, or dead-colour¬ ed, with red, make blue teints with ultramarine and a great deal of white, upon the parts which fly from the eye •, that is to fay, upon the temples j under and in the corners of the eyes j on both fides the mouth, above and below j a little upon the middle of the forehead $ between the nofe and the eyes 5 on the fide of the cheeks j on the neck and other places where the flefti affumes a bluifli call. Yellow'ifh teints are likewife made wdth ochre or orpiment, and a little vermilion mixed with whi?c, under the eyebrows, on the fides of the nofe towards the bottom, a little underneath the cheeks, and upon the other parts which rife and come nearer the eye. It is efpecially from thefe teints that the natural complexion is to be obferved, in order to catch it 5 for painting being an imitation of nature, the perfection of the art confifts in the juftnefs and fim- • plicity of the reprefentation, efpecially in face paint- ing. When, therefore, you have done your firft lay, your dead-colouring, and your teints, you muft work upon the ftiades, dotting with green for the carnations or naked parts, mixing, according to the rule we have given for the teints, a little blue for the parts which fly from the eye j and, on the other hand, making it a little yellower for thofe that are more fenfible that is to fay, which rife, and come nearer the eye; and at the end of the (hades, on the fide of the light, you muft blend and lofe your colour infenfibly in the ground of the carnation with blue, and then with red, according to the places where you paint. If this mix¬ ture of green does not work dark enough at firft, pafs over the (hades feveral times, now with red, and now with green 5 always dotting: and this do till they are as they (hould be. And if you cannot with thefe colours give the (hades all the force they ought to have, finifti, in the darkeft, with biftre mixed with orpiment, ochre, or vermilion, and fometimes with pure biftre, according to the co¬ louring you would make, but lightly, laying on your colour very clear. You muft dot upon the clear and bright places with a little vermilion or carmine, mixed with much white, and a very fmall matter of ochre, in order to lofe them with the (hadowy, and to make the teints die away in¬ fenfibly into one another 5 taking care, as you dot, or hatch, to make your ftrokes follow the turnings and windings of the fleftiy parts. For theugh the rule be to crofs always, this dotting or hatching ought to ap¬ pear a little more here, becaufe it rounds the parts. And as this mixture might make a colouring too red, if it was always to be ufed, they work likewife in every part, to blend the teints and the (hades with blue and a little green, and much white, fo mixed as to be very pale 5 excepting, neverthelefs, that this colour muft not be put upon the cheeks, nor upon the extremities of the clear parts, no more than the other mixture upon the.ie laft, which, muft be left with all their light ; as certain places of the chh, of the nofe, and of the forehead, and . pon the cheeks j which, and .4 PAINTING. Sea. V. the cheeks, ought neverthelefs to be redder than the Of reft, as well as the feet, the hollows of the hands, and Carnatlon5'< the fingers of both. Obferve, that thefe two laft mixtures ought to be fo pale, that the work (hall hardly be vifible ; for they fervc only to foften it •, to unite the teints with one another, and the (hades with the lights, and to drown the traces. Care muft likewife be taken that you work not too much with the red mixture upon the blue teints, nor with the blue upon the others ; but change the colour from time to time, when you per¬ ceive it works too blue or too red, till the work be fi- niftied. The white of the eyes muft be (hadowTed with this fame blue, and a little flefti colour j and the corners, on the fide of the nofe, with vermilion and white ; giving them a little touch of carmine. The whole is foftened with this mixture of vermilion, carmine, white, and a very fmall matter of ochre. The apples or balls of the eyes are done with the mixture of ultramarine and white 5 the laft prevailing a little 5 adding a little biftre, if they are yellowifti 5 or a little black, if they are gray. Make the little black circle in the middle, called the crystal of the eye; and (hadow the balls with indigo, biftre, or black, accord¬ ing to the colour they are of; giving to each a fmall touch of pure vermilion round the cryftal ; which muft be loft with the reft at the finiftnng. This gives viva¬ city to the eye. The round or circumference of the eye is done with biftre and carmine ; that is to fay, the flits or partings, and the eyelids, when they are large and bold ; efpe¬ cially the upper ones; which muft afterwards be foft¬ ened with the red or blue mixtures we have mention¬ ed before, to the end they may be loft in one another, and nothing feem interfered. When this is done, give a little touch of pure white upon the cryftal, on the fide of the lights. This makes the eye (hine, and gives life to it. The mouth is dead-coloured with vermilion, mixed with white ; and finifhed with carmine, which is foft¬ ened as the reft. And when the carmine does not work dark enough, mix a little biftre with it. This is to be underftood of the corners in the feparation of the lips ; and particularly, of certain mouths half open. The hands, and all the other parts of carnation, are done in the fame manner as the faces; obferving, that the ends of the fingers be a little redder than the reft. When your whole work is formed and dotted, mark the reparations of all the parts with little touches of carmine and orpiment mixed together, as well in the (hadowy as the light places ; but a little deeper and ftronger in the firft, and lofe them in the reft of the car¬ nation. The eyebrows and the beard are dead-coloured, as are the ihades of carnations ; and finiflied with biftre, ochre, or bFck, according to the colour they are of, drawing them by little ftrokes the way they ought to go ; that is to fay, give them all the nature of hair. The lights of them muft be heightened wutb ochre and biftre, a little vermilion, and much white. For the hair of the head, make a lay of biftre, ochre, and white, and a little vermilion. When it is very dark coloured, u(e black inftead of ochre. Afterwards form the (hadowy parts with the fame colours, putting lefs Sea. VI. MINIATURE Of lefs white in them ; and fini(h with pure biftre, or mix- Carnations. efl with ochre or black, by fmall ftrokes very fine, and 'l-l'r~v clofe to each other, waving and buckling them accord¬ ing to the curling of the hair. The light parts mull; alfo be heightened by little ftrokes with ochre or or- piment, white, and a little vermilion. After which, lofe the lights and the (hades in each other, by working fometimes with a dark and fometimes with a light co¬ lour. And for the hair about the forehead, through which the (kin is feen, it muft be firfl: formed with the co¬ lour thereof, and that of the carnaTion, working and (hadowing with one and the otTier, as if you defigned to paint none. Then form it, and finifii wuth biftre. The lights are to be heightened as the other. Gray hair is dead-coloured with white, black, and biftre, and finifhed with the fame colour, but deeper ; height¬ ening the bright and clear parts of the hair, as well as thofe of the eyebrows and the beard, with white and very pale blue, after having formed them as the others, with the colour of the flefti or (kin 5 and finifti with biftre. But the mod important thing is to foften one’s work •, to blend the teints in one another, as well as the beard and the hair about the forehead, with the other hair and the carnation *, taking efpecial care not to work rough and dry •, and that the traces, turnings, and windings of the carnation or naked parts, be not interfered. You muft likewife accuftom yourfelf to put white in your colours only in proportion as you work lighter or darker ; for the colour you ufe the fe- cond time muft be always a little ftronger and deeper fhan the firft, unlefs it be for foftening. Different colourings are eafily made, by putting more or lefs of red, or blue, or yellow, or biftre, whe¬ ther for the dead-colouring, or for the finiftring.— That for women ought to be bluifh ; that for child¬ ren a little red j and both frefh and florid. That for men ought to be yellower j efpecially when they are old. To make a colouring of death, there muft be a firfl: lay of white and orpiment, or a very pale ochre : dead- colour with vermilion, and lake, inftead of carmine, and a good deal of wdiite; and afterwards w'ork over it with a green mixture, in which there is more blue than any other colour, to the end the flefti may be li¬ vid and of a purple colour. The tints are done the fame way as in another colouring ; but there muft be a great many more blue than yellow ones, efpecially upon the parts w’hich fly from the fight, and about the eyes j and the laft are only to be upon the parts which rife and come nearer the eye. They are made to die away in one another, according to the ordinary man¬ ner 5 fometimes writh very pale blue, and fometimes with ochre and white, and a little vermilion *, foft¬ ening the whole together. The parts and con¬ tours muft be rounded with the fame colours. The mouth is to be, in a manner, of a quite violet. It is dead-coloured, however, with a little vermilion, ochre, and white ; but finiftied with lake and blue ; and to give it the deep ftrokes, they take biftre and lake, with which they likewife do the fame to the eyes, the nofe, and the ears. If it be a crucifix, or fome mar¬ tyr, upon vAom blood is to be feen, after the finifli- Vol. XIV. Part L PAINTING. 265 ing the carnation, form it with vermilion, and finilh ^ it with carmine, making in the drops of blood a little lj?nu^ap"s; bright reflecting fpark, to round them. For the crovvn of thorns, make a lay of fea green and mafticot; (hadow it with biftre and green $ and heighten the clear and light parts with mafticot. Iron is formed, or firft laid, wuth indigo, a little black and white ; and finiftied with pure indigo, heightening it with white. For painting fire and flames, the lights are done with mafticot and orpiment ; and for the (hades, they mix vermilion and carmine. A fmoke is done with black, indigo, and white, and fometimes with biftre ; one may likewife add vermilion or ochre, according to the colour it is to be of. Pearls are painted by putting a lay of w-hite, and a little blue : they are (hadowed and rounded with the fame colour, deeper ; a fmall white dot is made almoft in the middle on the fide of the light ; and on the other fide, between the (hadow and the edge of the pearl, they give a touch with mafticot, to make the reflexion ; and under the pearls is made a little ihadovv of the co¬ lour of the ground they are upon. Diamonds are made with pure black ; then they heighten them with little touches of wdiite on the fide of the light. It is the fame thing for any other jetvels you have a mind to paint : there is nothing to be done but to change the colour. For making a figure of gold, put a lay of (hell-gold, and (hadow it wuth gallftone. Silver is done the fame way ; excepting that it muft be (hadow7ed with indigo. One great means of acquiring a perfeflion in the art, is to copy excellent originals. We enjoy with pleafure and tranquillity the labour and pains of others. But a man muft copy a great number before he is able to pro¬ duce as fine effefts j and it is better to be a good copier than a bad author. Sect. VI. Of Landfcapes. In the firft place, After having ordered the economy of your landfcape as of your other pieces, you muft form the neareft grounds or lands, wdien they are to appear dark, with fap or lily-green, biftre, and a little verditer, to give a body to your colour ; then dot with this mix¬ ture, but a little darker, adding fometimes a little black to it. For fuch pieces of ground as the light falls upon, and which are therefore clear and bright, make a lay of ochre and white, then (hadow and finifti with biftre. In fome they mix a little green, particularly for (ha¬ dowing and finiftiing. There are fometimes upon the fore part certain red- difti lands ; which are dead-coloured with brown-red, white, and a little green j and finiftied wflth the fame, putting a little more green in them. For the making of grafs and leaves upon the fore¬ ground, you muft, when that is finiftied, form with fea- green, or verditer, and a little white ; and for thofe that are yellowifti, mix mafticot. Afterwards fliadow them with lily-green, or biftre and gallftone, if you would have them appear withered. The grounds or lands at a little diftance are formed L1 with 265 ' MINIATURE with verditer, and fnadowed and fiftiflied with fap- Landicapes green> adding bid re for feme of the touches here and there. * Such as are at a greater diflance, are done with fea-green and a little blue ; and fhadowed with ver¬ diter. In a word, the farther they go, the more bluifli they are to be made j and the fartheft diftance ought to be of ultramarine and white ; mixing in fome places fmall touches of vermilion. Water is painted with indigo and white, and fhadow¬ ed with the fame colour, but deeper; and to finifli it, inflead of dotting, they do nothing but make ftrokes and traces without eroding } giving them the fame turn with the waves, when there are any. Sometimes a lit¬ tle green muft be mixed in certain places, and the light and clear parts heightened with pure white, particularly where the wTater foams. Rocks are dead-coloured like buildings of ftone ; excepting that a little green is mixed for forming and fhadowing them. Blue and yellow teints are made up¬ on them, and loft with the reft in finifhing. And when there are fmall branches, with leaves, mofs, or grafs, when all is finiftied, they are to be railed at top with green and mafticot. They may be made yel- low, green, and reddifh, for appearing dry in the fame manner as on the ground. Rocks are dotted as the reft j and the farther they are off the more grayilh they are made. Caftles, old houfes, and other buildings of ftone and wood, are done in the manner above mentioned ; fpeak- ing of thofe things, when they are upon the firft lines. But when you would have them appear at a diftance, you muft mix brown-red and vermilion, with much white •, and lhadow very tenderly with this mixture 5 and the farther they are off, the weaker are the ftrokes to be for the reparations. If they are covered with flate, it is to be made bluer than the reft. frees are not done till the fky be finiftied •, one may, neverthelefs, fpare the places of them when they con¬ tain a good number ^ and however it be, fuch as come near the eye, are to be dead-coloured wuth verditer, mixing fometimes ochre ; and fhadovved with the fame colours, adding lily-green. Afterwards you muft work leaves upon them by dotting without crofting : for this muft be done with fmall longilh dots, of a darker colour, and pretty full of it, which muft be conduced on the fide the branches go, by little tufts of a little darker colour. Then heighten the lights with verditer or fea-green, and mafticot, making leaves in the fame manner ; and when there are dry branches or leaves, they are dead-coloured with brown-red or gallftone, with white 5 and finilhed with gallftone, without white, or with biftre. The trunks of trees are to be dead-coloured with ochre, white, and a little green, for the light and clear parts j and for the dark, they mix black, adding biftre and green for (hadowing one and the other. Blue and yellow tints are likewife made upon them and little touches given here and there with white and mafticot ; fuch as you ordinarily fee upon the bark of trees. 1 he branches which appear among the leaves are done with ochre, verditer, and white ; or with biftre PAINTING. Sect. VII. and white ; according to the light they are placed in. Of They muft be fhadovved with biftre and lily-green. flowers. Trees, which are at a little diftance, are dead-co- v loured with verditer and fea-green 5 and are lhadowed and finiftied with the fame colours, mixed with lily- green. When there are fome which appear yellowiih, lay with ochre and white, and finilh with gallftone. For fuch as are in the diftances and remote views, you muft dead-colour with fea-green ; with which, for finiftiing, you muft mix ultramarine. Heighten the lights of one and the other with mafticot, by fmall dif- joined leaves. It is the moft difficult part of landfcape, in manner of miniature, to leaf a tree well. To learn, and break one’s hand to it a little, the way is to copy good ones j for the manner of touching them is fingular, and can¬ not be acquired but by working upon trees themfelves j about which you muft obferve to make little boughs, which muft be leafed, efpecially fuch as are below and toward the Iky. And generally, let your landfcapes be coloured in a handfome manner, and full of nature and truth } for it is that which gives them all their beauty. Sect. VII. Of Flowers. It is an agreeable thing to paint flowers, not only on account of the fplendour of their different colours, but alfo by reafon of the little time and pains that are beftowed in trimming them. There is nothing but de¬ light in it ; and, in a manner, no application. You maim and bungle a face, if you make one eye higher than another ; a fmall nofe with a large mouth 3 and fo of other parts. But the fears of thefe difproportions conftrain not the mind at all in flower painting 3 for unlefs they be very remarkable, they fpoil nothing. For this reafon, moft perfons of quality, who divert themfelves with painting, keep to flowers. Neverthe¬ lefs, you muft apply yourfelf to copy juftly 3 and for this part of miniature, as for the reft, we refer you to nature, for fhe is your beft model. Work, then, after natural flowers ; and look for the tints and different colours of them upon your pallet : a little ufe will make , you find them eafily 3 and to facilitate this to you at the firft, we (hall, in the continuance of our defign, Ihow the manner of painting fome 3 for natu¬ ral flowers are not always to be had ; and one is often obliged to work after prints, where nothing is feen but graving. It is a general rule, that flowers are defigned and laid like other figures 3 but the manner of forming and finilhing them is different: for they are firft formed' only by large ftrokes and traces, which you muft turn at the firft the way the fmall ones are to go, with which you finifh 3 this turning aiding much thereto. And for finilhing them, infteacLof hatching or dotting, you draw fmall ftrokes very fine, and very clofe to one ano¬ ther, without crofting; repafling feveral times, till your dark and your clear parts have all the force you would give them. Of Roses.—After making your firft fketch, draw with carmine the red rofe, and apply a very pale lay of carmine and white. Then form the fhades with the fame colour, putting lefs white in it: and laftly, with pure \ Sea. vn. MINIATURE of pure carmine, but very bright and clear at the firft ; < Flowers. fortifying it more and more as you proceed in your ^ work, and according to the darknefs of the {hades. This is done by large ftrokes. Then finiQi •, working upon it with the fame colour by little ftrokes, which you muft make go the fame way with tbofe of the graving, if it be a print you copy •, or the way the leaves of the rofe turn, if you copy after a painting, or after nature $ lofing the dark in the clear parts, and heightening the greateft lights, and the brighteft or moft lightfome leaves, with white and a little car¬ mine. You muft always make the hearts of rofes, and the fide of the Ihadow darker than the reft j and mix a little indigo for ftiadowing the firft leaves, particu¬ larly when the rofes are blown, to make them feem faded. The feed is dead-caloured with gamboge j with which a little fap-green is mixed for ftiadowing. Rofes ftreaked with feveral colours, ought to be paler than others, that the mixture of colours may be better feen ; which are done with carmine 3 a little darker in the (hades, and very clear in the lights; always hatch¬ ing by ftrokes. For white rofes you muft put a lay of white, and form and finifti them as the red ; but with black, white, and a little biftre ; and make the feed a little yellower. Yellow rofes are done by putting in every part a lay of mafticot, and ftiadowing them with gamboge, gallftone, and biftre } heightening the clear and light places with mafticot and white. The ftiles, the leaves, and the buds of all forts of rofes are formed with verditer, with which is mixed a little mafticot and gamboge ; and for ftiadowing them, they add fap green, putting lefs of the other colours when the (hades are deep. The outfide of the leaves ought to be bluer than the infide j wherefore it muft be dead-coloured with fea green, and fap green mixed with that for ftiadowing, making the veins or fibres on this fide clearer than the ground, and thofe on the other fide darker. The prickles which are upon the ftiles and budS of rofes, are done with little touches of carmine, which are made to go every way ; and for thofe'that are upon the (talks, they are formed with verditer and carmine, and ftiadowed with carmine and biftre : making the bottom of the (talks more reddifti than the top, i. e. you muft mix with the green car¬ mine and pure biftre. Of Tulips.—As there is an infinity of tulips, dif¬ ferent from one another, one cannot pretend to men¬ tion the colours with which they are all done. We will only touch upon the handfomeft, ctf&z&flreahed; and thefe ftreaks are dead-coloured with very clear car¬ mine in fome places, and with darker in others 5 fi- niftiing with the fame colour by little ftrokes, which muft be carried the fame way with the ftreaks. And in others is put firft a lay of vermilion. Then they form them by mixing carmine, and finifti them with pure carmine. In fome they put Florence lake over the vermilion inftead of carmine. Some are done with lake and carmine mixed together, and with lake alone, or with white and lake for the firft forming j whether it be rofepink or Florence lake. There are fome of a purple colour, which are formed with ultra- marine, carmine, or lake, fometimes bluer and fome- times redder. The manner of doing both one and the other is the fame •, there is no difference but in the colfursj You muft, in certain places, as between PAINTING. 2&7 the ftreaks of vermilion, carmine, or lake, fometimes Of put blue made of ultramarine and white, and fome- Fi0wers- < times a very bright purple, which is finifhed by ftrokes as the reft, and loft with the ftreaks. There are fome likewife that have fallow tints, that are made with lake, biftre, and ochre, according as they are : but this is only in fine and rare tulips, and not in the common ones. For (hadovving the bottom of them, they ordinarily take indigo and white for fuch whofe ftreaks are of carmine. For fuch as are of lake, they take black and white ; with which, in fome, biftre is mixed, and in others green. Some are likewife to be ftiadovved with gamboge and umber, and always by ftrokes and traces, that turn as the leaves turn. Other tulips are likewife done, called bordered; that is to fay, the tulip is not ftreaked but on the edges of the leaves, where there is a border. It is white in the purple ; red in the yellow ; yellow in the red ; and red in the white. The purple is laid with ultramarine, carmine, and white ; ftiadowing and finifhing it with this mix¬ ture. The border is (pared ; that is to fay, let only a light lay of white be put there, and let it be ftiadovved with very bright indigo. The yellow is formed with gamboge, and (hadowed with the fame colour, mixing ochre and umber or biftre with it. The border is laid with vermilion, and fiaiftied with a very (mail matter of carmine. The red is formed with vermi¬ lion, and finiftied with the fame colour, mixing car¬ mine or lake with it. The bottom and the border are done with gamboge 5 and for finiftiing, they add gallftone and umber, or biftre. The white is ftia¬ dowed with black, blue, and white. Indian ink is very proper for this. The (hadowings of it are very tender. It produces alone the effect of blue and white, mixed with the other black. The border of this white tulip is done with carmine. In all thefe forts of tulips, they leave a nerve or finew in the middle of the leaves that are brighter than the reft : and the borders are drowned at the bottom by fmall traces, turning croffwife j for they muft; not appear cut and feparated, as the ftreaked or party-coloured. They make them likewife of feveral other colours. When they happen to be fuch whofe bottoms on the infide are black, as it were, they form and finifti them with indigo, as alfo the feed about the nozzle or ftalk. And if the bottom is yell*w, it is formed with gamboge, and finiftied by adding umber or biftre. The leaves and the ftalks of tulips are ordinarily formed with fea green, and ftiadowed and finiftied with lily green, by large traces all along the leaves. Some may likewife be done with verditer, mixing mafticot with it, and (ha¬ dowed with fap green, that the green of the {hades may be yellower. The Anemony, or WindJiower.—There are feveral forts of them, as well double as fingle. The la ft are ordinarily wdthout ftreaks. Some are made of a purple colour, with purple and white, ftiadowing them with the fame colour; fome redder, others bluer; fome- times very pale, and fometimes very dark. Others are formed with lake and white, and finifhed with the fame, putting lefs white ; fome without any white at all. Others are formed with vermilion, and (ha- dowed with the fame colour ; adding carmine. We fee likewife white ones, and fome of a citron colour. The laft are laid with mafticot;; and one and the other , L 1 2 ftiadofved MINIATURE PAINTING. fhadowed and finidied fornetimes with vermilion, and fometimes with very brown lake, efpecially near the feed, at the bottom ; which is often likewife of a blackiih colour, that is done with indigo, or black and blue, mixing for fome a little biftre ; and always working by very fine ftrokes and traces, and lofing the lights in the fhades. There are others that are brighter and clearer at the bottom than anywhere elfe; and fometimes they are perfe&ly white there, though the reft of the flower be dark. The feed of all thefe anemonies is done with indigo and black, with a very little white, and (hadowed with indigo ; and in fome it is raifed with mafticot. The double ane- rnonies are of feveral colours. The handfomeft have their large leaves ftreaked. Some are done, that is, the ftreaked or party coloured, with vermilion, to which carmine is added for the finithing •, fhadowing the reft of the leaves with indigo 5 and for the fmall leaves within, a lay is put of vermilion and white, and they are (hadowed with vermilion mixed wuth carmine, mixing here and there fome ftronger touches, efpecially in the heart of the flower, next the great leaves on the fide of the fhadow. They finifti with carmine, by little ftrokes and traces, turning the fame way with the mixed or party colours, and the leaves. They form and finifti the ftreaks or party colours of fome others, as well as the fmall leaves, with pure carmine •, leaving, neverthelefs, in the middle of the laft, a little circle, in which is laid dark purple, which is loft with the reft. And when all is finiihed, they give fome touches with this fame colour round about the fmall leaves, efpecially on the fide of the ftiadow, drowning them with the large ones, the remainder of which is fhadowed either with indigo or black. In fome, the fraall leaves are done with lake or purple, though the party colours of the large ones be done with carmine. There are others, whofe mixed colours are done with carmine, in the middle of moft of the large leaves; putting in fome places vermilion under¬ neath, and lofing thefe colours with the fliadows of the bottom ; which are done wuth indigo and wdiite. The fmall leaves are laid with mafticot, and fliadowed with very dark carmine on the fide of the {hade, and with very clear on the fide of the light, leaving there in a manner pure mafticot, and giving only fome little touches with orpiment and carmine, to feparate the leaves, which may be {hadowed fometimes with a very little pale green. There are double anemonies painted all red, and all purple. The firft are formed wuth ver¬ milion and, carmine, in a manner without white, and fhadowed with pure carmine, well gummed, that they may be very dark. Purple anemonies are laid with pur¬ ple, and white, and finifhed with white. In a word, there are double anemonies as there are Angle ones, of all colours ; and they are done in the fame manner. The green of one and the other is verditer ; wuth wdiich mafticot is mixed for forming. It is fhadowed and fitufhed with fap green. The ftiles of them are a little reddifti 5 wherefore they are fhadow7ed with car¬ mine mixed with biftre, and fometimes with green, af¬ ter having laid them with mafticot. The Carnation and the Pink.—It is with pinks and carnations as with anemonies and tulips ; that is, there are fome mixt-coloured, and others of one fingle colour,. The firft are ftreaked and diverfified fome- Sect. VII. times with vermilion and carmine ; fometimes with pure lake, or with white ; fome ftreaks very dark, and others very pale 5 fometimes by little ftreaks and di- verfifications, and fometimes by large ones. Their bottoms are ordinarily lhadowed with indigo and white. There are pinks of a very pale fleih colour, and ftreaked and diverfified wuth another, a little deeper, made with vermilion and lake. Others, which are of lake and white, are fhadowed and ftreaked without white. Others all red, which are done with vermilion and carmine as dark as poffible. Others all of lake. And, laftly, there are others, wherein nature or fancy is the rule. The green of one and the other is fea green, {hadowed with lily green or fap green. The Red Lily.—It is laid with red lead, formed with vermilion, and in the deepeft of the {hades with carmine ; and finiftied with the fame colour by ftrokes and traces, turning as the leaves turn. The clear and light parts are heightened with red lead and wdiite. The feed is done with vermilion and carmine. The green parts are done with verditer, fliadowed with lily or lap green. I he Day Lily.—There are three forts of them : 1. The gridelin, a little red ; 2. The gridelin, very pale ; and, 3. The white. For the firft they put a lay of lake and white, and fhadow and finifh with the fame colour deeper •, mix¬ ing a little black to deaden it, efpeciully in the darkeit places. The fecond are laid with w’hite, mixed with a very little lake and vermilion, in fuch a manner that thefe two laft colours are hardly feen. Afterwards thev ftiadow with black and a little lake, working redder in the middle of the leaves, next the ftalks; wdfich ought to be, as alfo the feed, of the fame colour, parti¬ cularly towards the top ; and at the bottom a little greener. The ftile of the feed is laid with mafticot, and {ha¬ dowed with fap green. The other day lilies are done by putting a lay of pure white, and ftiadowing and finifhing with black and white. The ftalks of thefe laft, and the greens of them all, are done writh fea green, and {hadowed with fap green. The Hyacinth, or PurpleJiower.—There are four forts of them : The blue, a little dark } Others paler; The gridelin j And the white. The firft are laid with ultramarine and white *, and {hadowed and finiihed with lefs white. Others are laid and {hadowed with pale blue. The gridelines are formed with lake and white, and a very {mall mat¬ ter of ultramarine } and finiihed with the fame colour a little deeper. For the laft they put a lay of white j then they fliadow them with black, with a little white; and finifti them all by ftrokes and traces, following the turnings and windings of the leaves. The green and the ftalks of fuch as are blue, are done with fea and lily green very dark : and in the ftalks of the firft may be mixed a little carmine, to make them red¬ difti. The ftalks of the two others, as alfo the green, are MINIATURE PAINTING. Seft. VII. Of are formed ivltl: vercliter and maflicct, and lliadowed i Flowers, with faj . reen. 'ji.- — Xhe Pion v .—A lay of Venice lake and white muft be put on all parts, pretty ilrong : then ihadc-v with lefs white, and with none at all in the darkeii places : after which nnifli with the fame colour by traces, turning them as for the rofe 5 gumming it very much in the deepeft of the fhades 5 and railing the lights and the edges of the molt lightfome leaves with white and a little lake. Little veins are likewife made, which go like the llrokes in hatching, but are more vilible. The green of tins flower is done with fea green, and fhadowed with fap green. Cowslips.—They are of four or five colours. There are fome of a very pale purple. The gridelin. The white and the yellow. The purple is done wdth ultramarine, carmine, and white ; putting lefs white for lhadowing. The gride¬ lin is laid with Venice lake, and a very fmall matter of ultramarine, with much white ; and fhadorved with the fame colour deeper. For the wdute a lay of white mull be put 5 and they muft be fhadowed with black and white 5 and finilhed, as the others, by tra¬ ces or ftrokes. The heart of thefe cowflips is done with mafticot in the lhape of a liar, which is Ihadow- ed with gamboge, making a little circle in the middle with fap green. The yellow are laid with mafticot, and fhadowed with gamboge and umber. The ftiles, the leaves, and the buds, are formed with verditer, mixed with a little mafticot, and finiflied with fap green j making the fibres or veins, which appear upon the leaves, with this fame colour j and heightening the lights of the largeft with mafticot. The Ranunculus, or Crow-foot.—There are fe- veral forts of them : the fineft are the orange-coloured. For the firft, they put a lay of vermilion, with a very fmall matter of gamboge 5 and add carmine for Iha- dowdng \ finilhing it with this laft colour, and a little gallftone. In the others may be put Venice lake in- flead of carmine, efpecially in the heart of the flower. The orange-coloured are laid with gamboge, and fi- niftied with gallftone, vermilion, and a little carmine ; leaving fome little yellow' ftreaks. The green of the ftalks is done with verditer and very pale mafticot $ mixing lily green to lhadow them. That of the leaves is a little darker. The Crocus.—Thefe are of two colours: Yellow and purple. The yellow are formed with mafticot and gallftone, and fhadowed with gamboge and gallftone : after which, upon each leaf, on the outfide, are made three ftreaks, feparate from one another, with biftre and pure lake •, which are loft, by little traces, in the bottom. The outfide of the leaves is left all yellow.—The purple is laid with car¬ mine, mixed with a little ultramarine, and very pale white. They are formed and finiflied with lefs white j making likewife, in fome, purple ftripes or ftreaks, very dark, as in the yellow ; and in others only fmall veins. The feed of both is yellow7, and is done with orpiment and gallftone. For the ftiles, they put a lay of white, and fliadow with black, mixed with a little green. The green of this flower is formed with very pale verditer, and fliadowed with fap green. The Iris.—The Perfian iris is done by putting, loz the infide leaver a lay of white? and fhadowing them With indigo and green together, leaving a little wfliite feparation in the middle of each and for thofe on the outfide, they put in the fame place a lay of maflicot, which is fhadow’ed with galiftone and orpiment ; making little dark and longifh dots over all the leaf, at a fmall diflance from one another. And at the end of each are made large ftrains, with biftre and lake in fome, and in others with pure indigo, but ver} black. The reft, and the outfide of the leaves, are ihadowed with black. The green is formed with fea green, and very pale mafticot, and fhadowTed with fap green. The Sufian iris is laid with purple and white, putting a little more carmine than ultramarine $ and for the tirades, efpecially in the middle leaves, they put lefs white j and, on the contrary, more ultramarine than carmine 5 making the veins of this very colour, and leaving in the middle of the infido leaves a little yellow finew. There are others which have this very finew in the firft leaves ; the end of which only is bluer than the reft. Others are ftia- dowed and finiftied with the fame purple, redder : They have alfo the middle finew on the outfide leaves ; but white and fliadowed with indigo. There are like¬ wife yellow ones j which are done by putting a lay of mafticot and orpiment; lhadowing them with gallftone, and making the veins upon the leaves with biftre. The green of one and the other is done with fea green, mix¬ ing a little mafticot for the ftiles. They are ihadowed with Tap green. The Jasmine.—It is done with a lay of white, and fhadowed with black and white 5 and for the outfide of the leaves, they mix a little biftre y making the half of each, on this fide, a little reddifti with carmine. The Tuberose.—For the doing of this, they make a lay of white, and lhadow with black, with a little biftre in fome places) and for the outlide of the leaves they mix a little carmine, to give them a reddi lh temt, particularly upon the extremities. The feed is done with mafticot, and lhadow'ed with fap green. The green of it is laid wdth verditer, and ftiadowed with fap green. The Hellebore.—The flower of hellebore is done almoft in the lame manner ; that is, let it be laid with w'hite, and fliadowed wdth black and biftre, making the outfide of the leaves a little reddilh here and there. The feed is laid with dark green, and railed with mafticot. The green of it is foul and rufty, and is formed with verditer, mafticot, and biftre; and linilhed with fap green and biftre. The White Lily.—It is laid with white, and flia- dow-ed with black and white. The feed is done with orpiment and gallftone. And the green is done as in the tuberofe. The Snow-drop.—It is formed and finilhed as the white lily. The feed is laid with mafticot, and Ih^ dowed with gallftone. And the green is done with fea and fap green. The Jonquil.—It is laid with mafticot and gall¬ ftone, and finilhed with gamboge and gallftone. The green is formed with fea green, and Ihadowed with fap green. The Daffodil.—All daffodils, the yellow, the double, and the lingle, are done by putting a lay of mafticot : they are formed with gamboge, and finiftied by adding umber and biftre ; excepting the bell in the middle, which is done with orpimefit and gallftone, bordered 270 MINIATURE ('i bordered or edged with vermilion and carmine. The ~ ^ . w hite are laid with white, and fhadowed with black and white 5 excepting the cup or bell, which is done with mafticot and gamboge. The green is Tea green, ihadowed with fap green. ihe Marigold.— It is done by putting a lay of niallicot, and then one of gamboge ; fhadowing it with this very colour, after vermilion is mixed with it : and for nmOiing, they add galltlone and a little carmine. 1 he green is done with verditer, (hadotved wdth fap green. Fhe Austrian Rose.-—For making the Auftrian rofe, they put a lay of *afticot, and another of gam- boge. I hen they form it, mixing gallftone j and finilh it with the laft colour, adding biftre and a very fmaJI matter of carmine in the deepeft fhades. ■ Ihe Indian Pink, or Trench Marigold.—It is done by putting a lay of gamboge ; fhadowing it with this colour, after you have mixed a good deal of carmine and gallftone with it 5 and leaving about the leaves a little yellow border of gamboge, very clear in the lights, and darker in the fhades> The feed is fhadow¬ ed with biftre. The green, as w'ell of the rofe as the pink, is formed with verditer, and finifhed with fap- green. The Sun-flower.—It is formed with mafticot and gamboge, and finifhed wbth gallftone and biftre. The green is laid with verditer and mafticot, and fhadowed with fap green. The Passion-flower.—It is done as the rofe, and the green of the leaves likewife ; but the veins are done with a darker green. Poetical Pinks and S\veet William.—They are done by putting a lay of lake and white ; fhadowing them with pure lake, with a little carmine for the laft; which are afterwards dotted on all parts with little round dots, feparate from one another; and the threads in the middle are raifed with white. The green of them is fea green, which is finifhed with fap green. Ihe Scabious.—There are two forts of fcabious, the red and the purple. The leaves of the firft are laid with Florentine lake, in which there is a little W'hite j and fhadowed without white *, and for the middle, which is a great bofs or hulk in which the feed lies, it is formed and finifhed with pure lake, with a little ultramarine or indigo to make it darker. Then they make little white longiih dots over it, at a pretty diftance from one another, clearer in the light than in the fliade, making them go every way. The other is done by putting a lay of very pale purple, as well upon the leaves as the bofs in the middle j fhadowing both with the fame colour, a little deeper : and inflead of little white touches for the feed, they make them pur¬ ple ; and about each grain they make out a little circle, and this over the whole bofs or hufk in the middle. The green is formed with verditer and mafticot, and fhadowed with fap green. The Sword or Day Uly.—lx. is laid with Florence lake and very pale white *, formed and finifhed with pure l«ke, very clear and bright in fome places, and very dark in others; mixing even biftre in the thickeft ot the fhades. I he green is verditer, fhadowed with fap green. ^ Hepatica, or Liverwort.——There is red and blue. J he laft is clone by putting on all parts a lay of ultra- 3 PAINTING, s Sea. VlT. marine, wdiite, and a little carmine or lake : fhadovv- ing the infide of the leaves with the mixture, but deeper ; excepting thofe of the firft rank ; for Which, and for the outfide of every one of them, they add indi¬ go and white, that the colour may be paler, and not fo fine. The red is laid with lake columbine and very pale wTite ; and finifhed with lefs white. The green is done with verditer, maflicot, and a little biftre ; and fha¬ dowed with fap green, and a little biftre, efpecially on the outfide of the leaves. The Pomegranate.—The flower of the pomegra¬ nate is laid with red lead fhadowed with vermilion and carmine ; and finifhed with this laft colour. The green is laid wuth verditer and mafticot, and fhadowed with fap green. The flower of the Indian Bean.—It is done with a lay of Levant lake and white ; fhadowing the middle leaves with pure lake ; and adding a little ultramarine for the others. The green is verditer, fhadowed with fap green. I he Columbine.—There are columbines of fevpral colours : the moft common are the purple, the gridelin, and the red. For the purple, they lay with ultrama¬ rine, carmine, and white •, and fliadcw with this mix'- ture. deeper. The gridelin are done the fame way, putting a great deal lefs ultramarine than carmine. The red are done with lake and white, finifhing with lefs white. There are fome mixed flowers of this kind, of feveral colours ; which muft be formed and finifhed as the others, but paler, making the mixtures of a little darker colour. The Lark’s Heel.—Thefe are of different colours, and of mixed colours : the moft common are the pur¬ ple, the gridelin and the red j w'hich are done as the columbines. Violets and Pansies.—Violets and panfies are done the fame way ; excepting that in the hft the tw’o middle leaves are bluer than the others, that is, the borders or edges 5 for the infide of them is yellow' : and there little back veins are made, which take their beginning from the heart of the flower, and die away towards the middle. The Muscipula, or Catch-fly.—There are two forts of it, the wftute and the red ; the laft is laid with lake and white, with a little vermilion, and finifhed with pure lake. As for the k»ot or nozzle of the leaves, it is formed with w'hite and a very fmall matter of vermilion, mixing biftre or gallftone to finifli it. 1 he leaves of the white are laid wdth white ; adding biflre and maflicot upon the knots which are fhadow¬ ed w’ith pure biftre, and the leaves with black and white. The green of all thefe flowers is done with verditer and mafticot, and fhadowed with fap green. The Crown Imperial,—which is of two colours, the yellow and the red. The .firft is done by putting a lay of orpiment, and fhadowing it with gallftonfc and orpiment with a little vermilion. The other is laid with orpiment and vermilion, and fhadowed with gallftone and vermilion ; making the beginning of the leaves next the ftile, with lake and biftre, very dark ; and veins with this mixture both in one and the other, all along the leaves. The green is done with verditer and mafticot, fhadowed with fap green and gamboge. The Cyclamen, or Sowbread.—The red is laid with Of Flowets. Sea. VII. MINIATURE PAINTING. with carmine, a little ultramarine, and much white 5 and finilhed with the fame colour, deeper ; putting, in a manner, only carmine in the middle of the leaves, next the heart, and in the reft add a little more ultra- marine. The other is laid with white, and (liadowed with black. The flalks of one and the other ought to be a little reddifh ; and the green, verditer and fap green. The Gilliflower.—There are feveral forts of gil- liflowers •, the white, the yellow, the purple, the red, and the mixed of various colours. The white are laid with white, and fhadowed with black, and with a little indigo in the heart of the leaves. The yellow, with mafticot, gamboge, and gallftone. The purple are formed with purple and white •, and finifhed with lefs white 5 making the colour brighter in the heart; and even a little yellowiih. The red with lake and white 5 finilhing them with white. The mixed coloured are laid with white, and the mixtures are fometimes made with purple, in which there is much ultramarine j others again, in which there is more carmine. Some¬ times they are of lake, and fometimes of carmine. Some are done with white, and others without wdiite } ihadowing the reft of the leaves with indigo. The feed of all is formed with verditer and mafticot, and finithed with fap green. The leaves and ftiles are laid with the fame green, mixing fap green to finidi them. Fruits, fifhes, ferpents, and all forts of reptiles, are to be touched in the fame manner as the figures of men are j that is, hatched or dotted. Birds and all other animals are done like flowers, by ftrokes or traces. Never make ufe, for any of thefe things, of white lead. It is only proper in oil. It blackens like ink, when only tempered with gum ; efpecially if- you fet your work in a moift place, or where perfumes are. Cerufs of Venice is as fine, and of as pure a white. Be not fparing in the ufe of this, efpecially in forming or dead-colouring j and let it enter into all your mix¬ tures, in order to give them a certain body, w'hich will render your work gluifh, and make It appear foft, plump, and ftrong. The tafle of painters is, neverthelefs, different in this point. Some ufe a little of it, and others none at all. But the manner of the laft is meagre and dry. Others ufe a great deal ; and doubtlefs it is the bell method, and molt followed among fkilful perfons 5 for befides that it is fpeedy, one may by the ufe of it copy all forts of pi£lures j which would be almoft impoffiblc othervvife j notwithftanding the contrary opinion of fome, who fay, that in miniature we cannot give the force and all the different teints we fee in pieces in oil. But this is not true, at leaft of good painters ; and effefts pr®ve it pretty plainly : for we fee figures, landfcapes, pic¬ tures, and every thing elfe in miniature, touched in as grand, as true, and as noble a manner (though more tender and delicate), as they are in oil. However, painting in oil has its advantages •, were they only thefe, that it exhibits more work, and takes up lefs time. It is better defended likewife againft the injuries of time 5 and the right of birth muff be granted it, and the glory of antiquity. But miniature likewife has its advantages; and with¬ out repeating fuch as have been mentioned already, it is neater and more commodious. You may eafily carry all your implements in your pockets, and work when and wherever you pleafe, without fuch a number of preparations. You may quit and refume it when and as often as you will ; which is not done in the other ; in which one is rarely to work dry. To conclude : In the art of painting, excellence does not depend upon the greatnefs of the fubjeft, but upon the manner in which it is handled. Some catch the airs of a face well 3 others fucceed better in land¬ fcapes : fome work in little, who cannot do it in large: fome are {killed in colours, who know little of defign : others, laftly, have only a genius for fiowrers : and even the Baffans got themfelves a fame for animals 3 which they touched in a very fine manner, and better than any thing elfe. • » Minim ij Minifter. M I N MINIM, in Mujic, a note equal to two crotchets, or half a femibreve. See Music. MINIMS, a religious order in the church of Rome, founded by St Francis de Paula, totvards the end of the 15th century. Their habit is a coarfe black wool¬ len fluff, with a woollen girdle, of the fame colour, tied in five knots. They are not permitted to quit their habit and girdle night nor day. Formerly they went barefooted, but are now7 allowed the ufe of fhoes. MINIMUM, in the higher geometry, the leaft quantity attainable in a given cafe. MINISTER, a perfon who preaches, performs re¬ ligious worfhip in public, adminifters the facraments, &c. Minister of State, a perfon to whom the prince in- trufts the adminiftration of government. See Coun¬ cil. Minnin. M I N Foreign Minister, is a perfon fent into a foreign Minifter country, to manage the affairs of his‘province or of the ftate to which he belongs. Of thefe there are two kinds : thofe of the firft rank are ambaffadors and en¬ voys extraordinary, who reprefent the perfons of their fovereigns 3 the minifters of the fecond rank are the or¬ dinary refidents. MINIUM, or Red-lead. See Chemistry In¬ dex. MINNIN, a ftringed inftrument of mufic among the ancient Hebrews, having three or four chords to it, although there is reafon to queftion the antiquity of this inftrument 3 both becaufe it requires a hair bow, which -was a kind of plecftrum not known to the an¬ cients, and becaufe it fo much refembles the modern viol. Kircher took the figures of this, the machul, chinnor, and pfaltery, from an old book in the Vatican library. MINOR, MIN [ 272 1 MI N Minor, MINOR, a Latin term, literally denoting lefs; , inon.a. ufe(] jn oppofition to major, greater. MltsOR, in Law, denotes a perfon under age } or who, by the laws of the country, is not yet arrived at the power of adminiftering his own affairs, or the poffeliion of his eftate. Among us, a pevfon is a mi¬ nor till the age of twenty-one, before which time his a61s are invalid. See Age. and Infant. It is a maxim in the common law, that in the king there is no minority, and therefore he hath no legal guardian 5 and his royal grants and affents to a£ls of parliament are good, though he has not in his natural capacity attained the legal age of twenty-one. It is alfo provided by the cuftom and law of parliament, that no one (hall fit or vote in either houfe, unlefs he be twenty-one years of age. This is likewufe exprefsly declared by flat. 7. and 8 Will. III. cap. 25. with re¬ gard to the houfe of commons. Minor, in Logic, is the fecond propofition of a for¬ mal or regular fyllogifm, called alfo the ajfumption. Minor, in Mufic, is applied to certain concords, which differ from or are lower than others of the fame denomination by a leffer femitone or four comma1;.— Thus we fay, a third minor, or leffer third, or a fixth major and minor. Concords th«t admit of major and minor, i. e. greater and lefs, are faid to be imperfedl concords. MINORCA, an ifland of the Mediterranean, fi- tuated between 39 and 40 degrees of north latitude, and near four degrees of eaft longitude. It is about 33 miles in length from north-weft to fouth-eaft, in breadth from eight to twelve, but in general about ten miles; fo that in fize it may nearly equal the county of Huntingdon or Bedfordfliire. The form is very irregu¬ lar; and the coafts are much indented by the lea, which forms a great number of little creeks and inlets, fome of which might be very advantageous. This iftand is one of tbofe called by the ancient Ro¬ mans Baleares, which arofe from the dexterity of the inhabitants in ufing the fling. It fell under the power of the Romans, afterwards of the northern barbarians, who deftroyed that empire. From them it w^as taken by the Arabs ; who w-ere fubdued by the king of Ma¬ jorca, and he by the king of Spain. The Englilh fub¬ dued it in 1708 ; it w’as afterwards retaken by the French in 1756, but reftored to Britain by the treaty of Paris in 1763. The Spaniards took it in 1782; and in 1798, it again became fubjeft to Great Bri¬ tain. The air of this ifland is much more clear and pure than in Britain ; being feldom darkened wdth thick fogs: yet the low valleys are not free from mills and un- wholefome vapours; and in windy weather the fpray of the fea is driven over the whole ifland. Hence it hap¬ pens that utenfils of brafs or iron are extremely fufcep- tible of ruft, in fpite of all endeavours to preferve them; and houfehold furniture becomes mouldy. The fum- mers are dry, clear, calm, and exceflively hot ; the au¬ tumns moift, warm, and unequal ; at one time perfectly ferene, at another cloudy and tempeftuous. During the winter there are fometirnes violent ftorms, though nei¬ ther frequent nor of long continuance ; and whenever they ceafe, the weather returns to its ufual ferenity. The fpring is always variable, hut refembles the winter Store than the fummer. The changes of heat and cold 2 are neither fo great nor fo fudden in this climate as in Minor many others. In the compafs of a year, the thermo- meter feldom rifes much above the 80th, or falls be¬ low the 48th degree. In fummer there is fcarcely ever a difference of four or five degrees between the heat of the air at noon and at night : and in winter the varia¬ tion is flill lefs conliderable. But this muft be under- ftood of a thermometer flvaded from the influence of the folar beams : for if expofed to them it will often rife 12, 14, or 16 degrees higher than wfliat we have mentioned ; and in other feafons the difference between the heat of the air in the fun and the lhade is much greater. Yet even in the dog-days, the heat of the atmofphere, at leaft in open places, feldom furpaffes that of human blood. The winds are very boifterous about the equinoxes, and fometimes during the winter. At other times they are generally moderate, and, according to the obfervations of feamen, they rarely blow in the fame diretftion near the iflands adjacent to the gulf of Lyons as in the open fea. During the fummer there is commonly a perfeft calm in the mornings and even¬ ings ; but the middle of the day is cooled by refrefliing breezes which come from the eaft, and, following the courfe of the fun, increafe gradually till two or three in the afternoon, after which they infenfibly die away as night approaches. This renders the heat of the fun lefs dangerous and inconvenient ; and if thefe breezes intermit for a day or two, the natives grow7 languid and inaftive from the heat. The northerly winds in general are cfear and healthy, difpel the mifts, and make a clear blue Iky ; whiift thofe which blow from the oppofite quarter, render the air w7arm, moift, and unhealthy. The north wind is fuperior in powder to all the reft ; which appears from hence, that the tops of all the trees incline to the foutb, and the branches on the north fide are bare and blafted. The next to it in force is the north-weft. Both are frequent tow-ards the clofe of winter and in the fpring ; and, being dry and cold, they (hrivel up the leaves of the vegetables, de- ftroy their tender (hoots, and are often exceflively de¬ trimental to the vineyards and riling corn. The pier¬ cing blafts at that feafon from the north-eaft, as they are more moift, and more frequently Attended with rain, are lefs prejudicial. The fouth and fouth-eaft winds are by much the moft unhealthy. In whatever feafons they blow, the air is foggy, and affedfts the breathing ; but in the fummer feafon they are fultry and fuffocating. An exceflive deje&ion of fpirits is then a univerfal complaint ; and on expofmg the ther¬ mometer to the rays of the fun, the mercury has fre¬ quently rifen above the 100th degree. The weft wind is ufually drier than the fouth : the eaft is cold and bluftering in the fpring, and fultry in the fummer. The weather in Minorca is generally fair and dry ; but when it rains, the (bowers are heavy, though of fhort continuance, and they fall moft commonly in the night. The (ky in fummer is clear, and of a beautiful azure, wuthout clouds or rain ; but moderate dews de- feend regularly after funfet. In autumn the weather becomes lefs ferene ; whirlwinds and thunder become frequent; and in the night time lightning, and thofe meteors called falling Jiars, are very common. Water fpouts alfo are often feen at that feafon, and frequently break upon the (bore. A fudden alteration in the wea¬ ther takes place about the autumnal equinox ; the Ikies are M IN ' [ 273 ] MIN Minorca, are darkened with clouds, and the rains fall in fuch quantities, that the torrents thereby occafioned, pour¬ ing down from the hills, tear up trees by the root, car¬ ry away cattle, break down fences, and do confiderable mifchief to the gardens and vineyards. But thefe anni- verfary rains are much more violent than lafting j al¬ ways falling in hidden and heavy {bowers, with inter¬ vals of fair weather. They are accompanied with thunder, lightning, and fqualls of wind, moft common¬ ly from the north. Hail and (now’ are often intermix¬ ed with the rains which fall in winter and in fpring 5 but the fnow, for the moft part, diilolves immediately j and ice is here an uncommon appearance. The whole coaft of Minorca lies law ; and there are only a few hills near the centre, of which the moft con¬ fiderable, named Toro by the inhabitants, may be feen at the diftance of 1 2 or 14 leagues from the land. The furface of the ifland is rough and unequal; and in many places divided by long narrow vales of a confiderable depth, called barancoes by the natives. They begin towards the middle of the ifiand, and after feveral windings terminate at the fea. The fouth-weft fide is more plain and regular than towards the north eaft ; where the hills are higher, with low marftiy valleys be¬ twixt them, the foil lefs fruitful, and the whole trad unhealthy to man and beaft. Near the towns and vil¬ lages the fields are well cultivated, and enclofed with Hone walls j but the reft for the moft part are rocky, or covered wnth woods and thickets. There are fome pools of Handing water, but very few rivulets, which is the greateft defed about the ifland, as the inhabi¬ tants have fcarcely any wholefome water excepting tvhat is faved from the clouds. The foil is light, thin, and very ftony, with a good deal of iea fait, and, in fome places, of calcareous nitre intermixed. In moft places there is fo little earth, that the ifland appears to be but one large irregular rock, co¬ vered here and there with mould, and an infinite varie¬ ty of ftones. Notwithftanding this, however, it is not ,only extremely proper for vineyards, but produces more wheat and barley than could at firlt fight be imagined j and if the peasants may be credited, it wouM always yield a quantity of corn and wine fufficient for the na¬ tives, did not the violence of the winds, and the excef- five drought of the weather, frequently fpoil their crops. The fields commonly lie fallow for two years, and are fown the third. About the latter end of winter, or the beginning of fpring, they are firft broke up : and next autumn, as foon as the rains fall, they are again plough¬ ed and prepared for receiving the proper feeds. The tillage is very eafily performed ; for a plough fo light as to be tranfported from place to place on the plough¬ man’s {boulder, and to be drawn by a heifer, or an afs fometimes aflifted by an hog, is fufficient for opening fo thin a foil. The later the harvelt happens, the more plentiful it proves. The barley is ufually cut down about the 20th of May and the wheat is reaped in June, fo that the whole harveft is commonly got in by Midfummer day. The grain is not thraftied with flails as in this country, but trodden out ®n a fmooth piece of rock by oxen and afles, according to the cuf- tom of the eaftern nations. The natives of Minorca are commonly lean, thin, eno well-built, of a middle ftature, and olive com- Vol. XIV. Part I. plexion ; but their character is by no means agree- Minorca, able. Such is the natural impetuofity of their temper, 'rm~~ that the flighteft caufe provokes them to anger, and they feem to be incapable of forgiving or forgetting an injury. Hence quarrels break out daily, even among neighbours and relations : and family difputes are trani- mitted from father to fon ; and thus, though lawyers and pettifoggers are very numerous in this country, there are ftill too few for the clients. Both fexes are, by conftitution, extremely amorous : they are often be¬ trothed to each other while children, and marry at the age of 14. The wTomen have eafy labours, and com¬ monly return in a few days to their ufual domeftic bu- finefs; but, left the family ftiould become too numer¬ ous for their income, it is a pra&ice among the poorer fort to keep their children at the breaft for two or three years, that by this means the mothers may be hindered from breeding. Bread of the fineft wheat flour, well fermented and well baked, is more than half the diet of people of all ranks. Rice, pulfe, vermicelli, herbs and roots from the garden, fummer fruits, pickled olives and pods of the’ Guinea pepper, make up almoft all the other half, fo that fcarce a fifth of their whole food is fur- niftved from the animal kingdom, and of this fifti makes by much the moft confiderable portion. On Fridays, and other fall days, they abftain entirely from flefh $ and during Lent they live altogether on vegetables and fifti, excepting Sundays, when they are permitted the ufe of eggs, cheefe, and milk. Moft of their difties are high-feafoned with pepper, clones, cinnamon, and other (pices ; and garlic, onions, or leeks, are almoft: ^onftant ingredients. They eat a great deal of oil, and that none of the fweeteft or be ft flavoured ; ufing it not only with falads, but alfo with boiled and fried fifh, greens, pulfe, &c. inftead of butter. A flice of bread loaked in boil-d water, with a little oil and fait, is the common breakfaft of the peafants, well known by the name of olea^ua. Their ordinary meals are very frugal, and confift of very little variety j but on feftivals and other lolemn occafions their entertainments are to the laft degree profule and extravagant, info- much that the bill of fare of a country farmer’s wed¬ ding dinner would fcarce be credited. With regard to other matters, the Minorquins are accufed of prodigious indolence in the wray of bufinefs, and neglefl ot the natural advantages they poffefs. In the bowels of the earth are iron, copper, and lead ores, of none of which any ufe hath been made except the laft. A lead mine was wrorked to advantage fome t:me ayo, and the ore fent into France and Spain for the ufe of the potteries in thofe countries. The proprie¬ tor difcontinued his work on fome fmall difcourage- ment ; and indeed it is faid, that thefe people are of all mankind the moft eafily put out of conceit with an undertaking that does not bring them in mountains of prefent gain, or that admits of the flighteft probabi¬ lity of difappointing their moft fanguine expeflations : nor will their purfe admit of many difappointments ; and thus their poverty co-operating with their natural delpondence and love of eafe, is the principal caufe of their backwardnefs to engage in projefls, though ever fo promifing, for the improvement of their private for¬ tune, and the advantage of the commerce of their M m country. MIN [2 country. This lead ore went under the name of vernis among the natives, as it was wholly ufed by the potters in varnilhing and gla/dng their earthen velTels. There are few exports of any account, and they are obliged to their neighbours for near one-third of their corn, all their oil, and fuch a variety of articles of -lefs confideration, that nothing could preferve them from a total bankruptcy, but the Englilh money circu¬ lated by the troops, which is exchanged for the daily fupplies of provihons, increafed by the multiplication of vineyards, the breeding of poultry, and the production of vegetables, in a proportion of at lead five to one fince the ifland has been in our poffeflion. It will not require many words to enumerate tbeir exports : they make a fort of cheefe, little liked by the Englilh, which fells in Italy at a very great price ^ this, perhaps, to the amount of 8ool. per annum.—The wool they fend abroad may produce qocl. more.—Some wine is expor¬ ted 5 and, if we add to its value that of the home con- fumption, which has every merit of an export, being nine parts in ten taken off by the troops for ready money, it may well be eftimated at i 6,ocol. a-year. In honey, wax, and fait, their yearly exports may be about 400I. and this comes pretty near the fum of their exports, which we eftimate together at 18,look Ilerling jOer annum. A vaft balance lies againd them, if we confider the variety and importance of the articles they fetch from ether countries, for which they mud pay ready cadi. Here it may be neceffary to withdraw fome things from the heap, fuch as their cattle, fheep, and fowls, on which they get a profit; for the country does not produce them in a fufficient abundance to fupply them, efpecially when we have a fleet of men of war llation- ed there. Their imports are, corn, cattle, flieep, fowls, to¬ bacco, oil, rice, fugar, fpices, hardware, and tools of all kinds \ gold and filver lace ; chocolate, or co¬ coa to make it ; tobacco, timber, plank, boards, mill- flones, tobacco pipes, playing cards, turnery ware, feeds, foap, fafidles ; ail manner of cabinetmakers work, iron fpikes, nails, fine earthen ware, gla's lamps, brafiery 5 paper, and other dationary wares 5 copperas, galls, dye duffs, painters brufhes and co¬ lours 5 mufical indruments, mufic, and dringsj watches, wine, fruit ; all manner of fine and printed linens, muflins, cambrics, and laces 5 bottles, corks, darch, indigo, fans, trinkets, toys, ribbands, tape, needles, pins, filk, mohair, lanthorns, cordage, tar, pitch, ro- fin, drugs, gloves, fire arms, gunpowder, ihot, and lead ; hats, caps, velvet, cotton duffs, woollen cloths, dockings, capes, medals, vedments, luftres, pictures, images, agnus dei’s, books, pardons, bulls, relicks, and indulgencies. The ifland is divided into what they ftyle lerminos, of which there were anciently five, now reduced to four, and refemble our counties. The tenrinoof Ciudadella, at the north-weflern extremity of the ifland, is fo fly led from this plaice, which was once a city, and the capital of Minorca. It makes a venerable and majeftic figure, even in its prefent ftate of decay, having in it a large Gothic cathedra], fome other churches and convents, the governor’s palace, and an exchange, which is no contemptible pile —There are in it 600 houfes, which before the feat of government and the courts of judice 74 ] M I N were removed to Mahon, were fully inhabited ; and there are dill more gentlemen’s families here than in all the red of the itland. It hath a port commodious enough for the veffels employed in the trade of this country, which, though in the poffeflion of- a maritime power, is lefs than it formerly was. It is dill, in the flyle of our officers, the bejl quarters (and there are none bad) in the country $ and it there was a civil go¬ vernment, and the place made a free port, the bed jud¬ ges are of opinion it would very foon become a flouri- fliing place again ; and the fortifications, if it ffiould be found neceffary, might then alfo be eafily redored and improved. The termino of Fcrerias is the next, a narrow dip reaching crofs from fea to fea, and the country little cultivated ; it is therefore united to Mercandal. In this lad termino dands Mont-toro in the very centre of the ifle, and the highed ground, ferae fay the only moun¬ tain in it; on the fummit of which there is a convent, where even in the hotted months the monks enjoy a cool air, and at all times a mod delightful profpeck About fix miles north from Mont-toro dands the cadle that covers Port Fornelles, which is very fpacious har¬ bour on the ead lide of the ifland. There are in it flioals and foul ground, which, to thofe vffio are unac¬ quainted wdth them, render it difficult and dangerous ; yet the packets bound from Mahon to Marfeilles fre¬ quently take flicker therein *, and while the Spaniards were in poffeffion of the ille, large fliips and men of war frequented it. At a fmall diftance from this lies ano¬ ther harbour called sldia, which runs far into the land but being reputed unfafe, and being fo near Fornelles, is at prefent ufelefs. The country about it is, however, faid to be the pleafanteft and wholefomeft fpot in the ifland, and almofl the only one plentifully fuppiied with excellent fpring water ; fo that the gardens are well laid out, and the richeft and fineft fiuits grow here in the higbefi perfection. Alaior is the next termino, in which there is nothing remarkable but the capital of the fame name, well fituated on an eminence, in a plea- fant and tolerably cultivated country. The termino of Mahon, at the fouth-eafl: end of the ifland, is at prefent the moft confiderable of them all, containing about 60,000 Englifh acres, and nearly one- half of the inhabitants in Minorca. The town of Mahon derives its name from the Carthaginian general Mago, wffio is univerfally allowed to be its founder.— It Hands on an eminence on the weft ftde of the har¬ bour, the afeent pretty fteep. There are in it a large church, three convents, the governor’s palace, and fome other public edifices. It is large, but the ftreets are winding, narrow and ill paved. The fortrefs of St Philip Hands near the entrance of the harbour, which it covers, is very fpacious, of great ftrength, with fub- terranean works to protect the garrifon from bombs, large magazines, and whatever elfe is neceffary to render it a complete fortification, and hath a numerous and well difpofed artillery. Port Mahon is allowed to be the fineft harbour in the Mediterranean, about go fa¬ thoms wdde at its entrance, but within very large and fafe, ftretching a league or more into the land. Beneath the towm of Mahon there is a very fine quay, one end of which is referved for the ihips of war, and furnifhed wdth all the accommodations neceffary for careening and refitting them 5 the other ferves for merchantmen. On Minorca. Minors 1| Minotaur. MIN [ 275 1 MIN On the other fide of the harbour is Cape Mola, where it is generally agreed a fortrcfs might be conftrufled which would be impregnable, as the callle of St Philip was elleemed before we took it, and bellowed fo much money upon it, that, though fome works were eretled at Cape Mola, it was not judged proper to proceed in the fortifications there at a frelh expence ; at lead this is the only reafon that hath been affigned. Minorca was taken by the Spaniards during the American war, and is now in their poffeiTion. MINORS, or Friers Minor, an appellation which the Francifcans affume, out of Ihow of humility; calling themfelves fratres minores, i. e. lefler brothers, and fometimes minorites. There is alfo an order of regular minors at Naples, which was ellablilhed in the year 1588, and confirmed by Sixtus V. MINOS, in Fabulous HiJionj, a king of Crete, f0n of Jupiter and Europa. He ilourilhed about 1432 years before the Chrifiian era. He gave laws to his fubjefls, which llill remained in full force in the age of the philofopher Plato, about 1000 years after the death of the legiilator. His juflice and moderation precured him the appellation of the favourite of the gods, the confident of Jupiter, and the wife legiilator, in every city of Greece ; and, according to the poets, he was rewarded for his equity after death with the office of fupreme and abfolute judge in the infernal regions. In this capacity he is reprefented fitting in the middle of the fhades,-and holding a feeptre in his hand. The dead plead their different caufes before him ; and the impartial judge {hakes the fatal urn, which is filled with the deftinies of mankind. He married Ithona, by whom he had Lycaftes, who wTas the father of Mffios II.* Minos II. was a fon of Lycalfes, the fon of Mi¬ nos I. and king of Crete. He married Pafiphae, the daughter of Sol and Perfeis, and by her he had many children. He increafed his paternal dominions by the conquelf of the neighbouring ifiands •, but (bowed him- felf cruel in the war which he carried on againll the A- thenians, who had put to death his fon Androgeus. He took Megara by the treachery of Scylla ; and not fatisfied with vi&ory, be obliged the vanquiffied to bring him yearly to Crete feven chofen boys and the fame number of virgins to be devoured by the Mino¬ taur. This bloody tribute was at laft abolilbed when Theseus had deflroyed the monfler. When Djedalus, whofe induftry and invention had fabricated the laby¬ rinth, and whofe imprudence in affiiling Pafiphae in the gratification of her unnatural defires, had offended Minos, fled from the place of his confinement with wings, and arrived fafe in Sicily ; the incenfed monarch purfued the offender, refolved to puniffi his infidelity. Cocalus, king of Sicily, who had hofpitably received Daedalus, entertained his royal gueft with diffembled friendfliip ; and, that he might not deliver to him a man whofe ingenuity and abilities he fo well knew, he put Minos to death. Minos died about 35 years before the Trojan war. He was father of Androgeus, Glau- cus, and Deucalion *, and two daughters, Phaedra, and Ariadne. Many authors have confounded the two Minofes, the grandfather and the grandfon; but Homer, Plutarch, and Diodorus, prove plainly that they were two different perfons. MINOTAUR, in Fabulous Bijiory^ a celebrated monfter, half a man and half a bull, according to this verfe of Ovid, Bemibovemque virum, fernivirumque bovem. Minotv .11 Minftre!. It was the fruit of Pafiphae’s amour with a bull. Mi¬ nos refufed to facrifice a white bull to Neptune, an animal which he had received from the god for that purpofe. This offended Neptune, and he made Pa¬ fiphae the wife of Minos enamoured of this fine bull, which had been refufed to his altars. Daedalus profti- tuted his talents in being fubfervient to the queen’s unnatural defires ) and by bis means, Pafiphae’s hor¬ rible paffions were gratified, and the Minotaur came into the world. Minos confined in the labyrinth this monfter, which convinced the world of his wife’s laf- civioufnefs, and reflefted difgrace upon his family. The Minotaur ufually devoured the chofen young men and maidens which the tyranny of Minos yearly ex- a£led from the Athenians. Thefeus delivered his country from this tribute, when it had fallen to his lot to be facrificed to the voracity of the Minotaur j and by means of Ariadne, the king’s daughter, he de- flroyed the monfter, and made his efcape from the windings of the labyrinth.—The fabulous tradition of the Minotaur, and of the infamous commerce of Pafi¬ phae with a favourite bull, has been often explained. Some fuppofe that Pafiphae was enamoured of one of her huffiand’s courtiers called Taurus; and that Dae¬ dalus favoured the paffions of the queen, by fuffering his houfe to become the retreat of the two lovers. Pafiphae fome time after brought twins into the world, one of whom greatly refembled Minos and the other Taurus; and in the natural refemblance of their coun¬ tenance with that of their fuppofed fathers, originated their name, and confequently the fable of the Mino¬ taur. MI NOW, a very fmall fpecies of cyprinus, fo well known that it needs no defeription. MINSTER, (Saxon, MjnJier or Mynjlre), ancient¬ ly fignified the church of a monaftery or convent. MINSTREL, an ancient term for a finger and inftrumental performer. The word minjlrel is derived from the French mene- Jlner, and was not in ufe here before the Norman con- queft. It is remarkable, that our old monkiffi hifto- rians do not ufe the xvord eithercedus, cantator, or the like, to exprefs a minjlrel in Latin ; but either mimus, hiJlrio,joculator^ or fome other xvord that impliesgejlure. Hence it ftiould feem that the minftrels fet off their finging by mimicry or a£lion; or, according to Dr Brown’s hypothefis, united the powers of melody, poem, and dance. The Saxons as xvell as the ancient Danes, had been accuftomed to hold men of this profeffion in the high- eft reverence. Their (kill was confidered as fomething divine, their perfons were deemed facred, their atten¬ dance was folicited by kings, and they were every¬ where loaded with honours and rewards. In ffiort, poets and their art were held among them in that rude admiration which is ever ffiown by an ignorant people to fuch as excel them in intellectual accomplifiunents. When the Saxons were converted to Chriftianity, in proportion as letters prevailed among them this rude admiration began to abate, and poetry was no longer a peculiar profeffion. The poet and the minftrel be- M m 3 cams MIN [ 276 ] MIN came two perfons. Poetry was cultivated by men of letters indifcriminately, and many of tbe moft popular rhymes were compofed amidft the lelfure and retire¬ ment of monafteries. But the minftrels continued a diftinft order of men, and got their livelihood by fing- ing verfes to the harp at the houfes of the great. There they were ftill hofpitably and refpe&fully re¬ ceived, and retained many of the honours ftiown to their predeceffors the Bards and Scalds. And in¬ deed, though fome of them only recited the compoli- ttons of others, many of them ftill compofed fongs themfelves : and all of them could probably invent a few ftanzas on occafion. There is no doubt but moft of the old heroic ballads were produced by this order of men. For although fome of the larger metrical romances might come from the pen of the monks or others, yet the fmaller narratives were probably com¬ pofed by the mihftrels who fung them. From the amazing variations which occur in different copies of thefe old pieces, it is evident they made no fcruple to alter each other’s produ&ions, and the reciter added or omitted whole ftanzas according to his own fancy or convenience. In the early ages, as is hinted above, this pro- feffion was held in great reverence among the Saxon tribes, as well as among their Danilh brethren. This appears from two remarkable fatfts in hiftory, which ftiow that the fame arts of mulic and fong were equally admired among both nations, and that the privileges and honours conferred upon the profeffors of them were common to both $ as it is well known their cu- ftoms, manners, and even language, were not in thofe times very diflimilar. When King Alfred the Great was defirous to learn the true fituation of the Danilh army, which had in¬ vaded his realm, he affumed the drefs and charadler of a minftrel; and taking his harp, and only one at¬ tendant (for in the earlieft times it was not unufual for a minftrel to have a fervant to carry his harp), he went with the utmoft fecurity into the Danifh camp. And though he could not but be known to be a Saxon, the character he had affumed procured him an hofpitable reception ; he was admitted to entertain the king at table, and ftaid among them long enough to contrive that affault which afterwards deftroyed them. This was in the year 878. About 60 years after, a Danifti king made ufe ef the fame difguife to explore the camp of King Athel- ftan. WTith his harp in his hand, and dreffed like a minftrel, An)j|ff king of the Danes went among the Saxon tents, and taking his ftand near the king’s pa¬ vilion, began to play, and was immediately admitted. There he entertained Athelftan and his lords with his finging and his mufic ; and was at length difmiffed with an honourable reward, though his fongs muft have difcovered him to have been a Dane. Athel¬ ftan was faved from the confequences of this ftratagem by a foldier, who had obferved Anlaff bury the money which had been given him, from fome fcruple of ho¬ nour or motive of fuperftition. This occafioned a dif- covery. From the uniform procedure of both thefe kings, it is plain that the fame mode of entertainment prevailed among both peoples, and that the minftrel was a pri¬ vileged chara&er among both. Even as. late as the reign of Edward II. the minftrels were eafdy admitted MinftreL into the royal prefei)ce, as appears from a paffage in ‘ " v -■ Stow, which alfo thowTs the fplendour of their appear¬ ance. “ In the year 1316, Edward II. did folemnize his feaft of Pentecoft at Weftminfter, in the great hall j where fitting royally at the table with his peers about him, there entered a woman adorned like a minftrel, fitting on a great horfe trapped, as minftrels then ufed, who rode round about the tables, fliowing paf- time ; and at length came up to the king’s table and laid before him a letter, and forthwith turning her horfe, faluted every one, and departed.”-^-The fub~ je& of this letter was a remonftrance to the king on the favours heaped by him on his minions, to the negleft of his knights and faithful fervants. The meffenger was fent in a minftrel’s habit, as what would gain an eafy admiflion j and was a woman concealed under that habit, probably to difarm the king’s refentment ; for. we do not find that any of the real minftrels were of the female fex $ and therefore conclude this was only an artful contrivance peculiar to that occafion. In the 4th year of Richard II. John of Gaunt x eredted at Tetbury in Staffordlhire a court of minftrels, with a full power to receive fuit and fervice from the men of that profeflion within five neighbouring counties, to enadl laws, and determine their controverfies j and to apprehend and arreft fuch of them as fhould refufe to appear at the faid court, annually held on the 16th of Auguft. For' this they had a charter, by which they were empowered to appoint a king of the min¬ ftrels with four officers to prefide over them. Thefe were every year elefted with great ceremony ; the whole form of which is defcribed by Dr Plott 5 in whofe time, however, they feem to have become mere. muficians. Even fo late as the reign of King Henry VIII. the reciters of verfes or moral fpeeches learnt by heart, intruded without ceremony into all companies; not only in taverns, but in the houfes of the nobility them¬ felves. This we learn from Erafmus, whofe argument led him only to defcribe a fpecies of thefe men who did not fing their compofitionsj but the others that did, en¬ joyed without doubt the fame privileges. We find that the minftrels continued down to the reign of Elizabeth j in whofe time they had loft much of their dignity, and were finking into contempt and negleft. Yet ftill they fuftained a character far fuperior to any thing we can conceive at prefent of the fingers of old ballads. , When Queen Elizabeth was entertained at Killing- worth caftle by the earl of Leicefter in 1575, among the many devices and pageants which were exhibited for her entertainment, one of the perfonages introduced was that of an ancient minftrel, whofe appearance and drefs are fo minutely defcribed by a writer there pre¬ fent, and gives us fo diftinft an idea of the chara£ler, that we ffiall quote the paffage at large. “ A perfon very meet feemed he for the purpofe, of a xlv. years old, apparelled partly as he w’ould himfelf. His cap off: his head feemingly rounded tonfterwife : fair kembed, that, with a fponge daintly dipt in a little capon’s greafe, was finely fmoothed, to make it Ikine like a mallard’s wing. His beard fnugly fhaven ; M I N [ 277 ] M I N Mint, {haven : and yet his fliirt after the new trink, with ruffs Minftrel. fa;r ftarched, flecked, and gliftering like a pair of new ihoes marflialled in good order with a fetting flick, and ft rut, ‘ that’ every ruff flood up like a wafer. A fide [i. e. long] gown of Kendale green, after the frefli- nefs of the year now, gathered at the neck with a nar¬ row gorget, faftened afore with a white clafp and a keeper clofe up to the chin •, but eafily, for heat, to undo when he lift. Seemingly begirt in a red caddis girdle: from that a pair of capped Sheffield knives hanging a’ two fides. Out of his bofom drawn from a lappet of his napkin edged with a blue lace, and marked with a D for Damian j for he was but a bachelor yet. “ His gown had fide [i. e. long] fleeves down to midleg, flit from the (boulder to the hand, and lined with white cotton. His doublet fieeves of black wor- fted : upon them a pair of points of tawny chamlet laced along the wrift with blue threaden pointes. A weak towards the hands of fuftian-a napes. A pair of red neather flocks. A pair of pumps on his feet, with a crofs cut at his toes for corns j not new indeed, yet cleanly blackt with foot, and fliining as a flioing horn. “ About his neck a red ribband fuitable to his girdle. His harp in good grace( dependent before him. His wreft tyed to a green lace and hanging by : under the gorget of his gown a fair flaggon chain (pewter for) filver, as a Squire Minftrel of Middlefex, that travelled the country this fummer feafon, unto fair and worftiipful men’s houfes. From his chain hung a fcutcheon, with metal and colour, refplendent upon h:s breaft, of the an¬ cient arms of Iflington.” —This minftrel is defcribed as belonging to that village. We fuppofe fuch as were retained by noble families wore their arms hanging down by a filver chain as a kind of badge. From the expr^flion of Squire Minftrel above, we may conclude there were other in¬ ferior orders, as Yeomen Minftrels or the like. This minftrel, the author tells us a little below, “ after three lowly courtefies, cleared his voice with a hem . .. and wiped his lips with the hollow of his hand for ’filing his napkin 5 tempered a firing or twm with his wrift ; and, after a little warbling on his harp for a prelude, came forth with a folemn fong, warranted for ftory out of King Arthur’s a£ls, &c.” . Towards the end of the 16th century, this clafs of men .had loft all credit, and were funk fo low in the public opinion, that in the 39th year of Elizabeth a ftatute was paffed by which “ minftrels, wandering abroad, were included among “ rogues, vagabonds, and fturdy beggars,” and w?ere adjudged to be punifhed as fuch. This aft feems to have put an end to the pro- feffion, for after this time they are no longer mentioned. MINT, the place in which the king’s money is coin¬ ed. See Coinage. t There were anciently mints in almoft every county in England 5 but the only mint at prefent in the Bri- tifh dominions is that in the tower of London. The officers of the mint are, 1. The warden of the mint, who is the chief j he overfees the other officers, and receives the bullion. 2. The mafter worker who re¬ ceives bullion from the wardens, caufes it to be melted, delivers it' to the moneyers, and, when it is coined, receives it again. 3. The comptroller, who is the overfeer of all the inferior officers, and fees that all the money is made to the juft affize. 4. The affay mafter, ' who wreighs the gold and filver, and fees that it is according to the ftandard. 5. The twm auditors -who take the accounts. 6. The furveyor of the melting ; ■who, after the affay mafter has made trial of the bul¬ lion, fees that it is call out, and not altered after it is delivered to the melter. 7. The engraver 3 who en¬ graves the (lamps and dies for the coinage of the mo¬ ney. 8. The clerk of the irons; who fees that the irons are clean and fit to work with. 9. The melter, who melts the bullion before it be coined. 10. The provoft of the mint 3 who provides for and overfees all the moneyers. 11. The blanchers, who anneal and cleanfe the money. 12. The moneyers 3 fome of whom forge the money, fome (hare it, fome round and mill it, and fome (lamp and coin it. 13. Ihe porters who keep the gate of the mint. Mint was alfo a pretended place of privilege, in Southwark, near the King’s Bench, put down by ftatute. If any perfons, within the limits of the mint, (hall obftruft: any officer in the ferving of any writ or procefs, &c. or affault any perfon therein, fo as he receive any bodily hurt, the offender (hall be guilty of felony, and be tranfported to the plantations, Stat. 9. Geo. I. Mint Marks. It hath been ufual, from old time, to oblige the mafters and workers of the mint, in the indentures made with them, “ to make a privy mark in all the money that they made, as well of gold as of filver, fo that another time they might know, if need were, and witte which moneys of gold and filver among other of the fame moneys, were of their own making, and which not.” And whereas, after every trial of the pix at Weftminfter, the mafters and work¬ ers of the mint, having there proved their moneys to be lawful and good, were immediately entitled to re¬ ceive their quietus under the great feal, and to be dif- charged from all fuits or aftions concerning thofe moneys, it was then ufual for the faid mafters and workers to change the privy mark before ufed for ano¬ ther, that fo the moneys from which they were not yet difcharged might be diftinguifhed from thofe for which they had already received their quietus: which new mark they then continued to (lamp upon all their moneys, until another trial of the pix gave them alfo their quietus concerning thofe. The pix is a ftrong box with three locks, whofe' keys are refpeftively kept by the warden, mafter, and comptroller of the mint 3 and in which are depofited, fealed up in feveral parcels, certain pieces taken at random out of every journey as it is called 3 that is, out of every 15 pounds weight of gold, or 60 pounds weight of filver, before the fame is delivered to the proprietors. And this pix is, from time to time, by the king’s command, opened at Weftminfler, in the prefence of the lord-chancellor, the lords of the coun¬ cil, the lords-commiflioners of the treafury, the ju- ftices of the feveral benches, and the barons of the exchequer 3 before whom a trial is made, by a jury of goldfmiths impannelled and fworn for that purpofe, of the colleftdve weights of certain parcels of the fe¬ veral pieces of gold and filver taken at random from thofe contained in the pix 3 after which thofe parcels being feverally melted, affays are then made of the . bulUotj. Mint. M IN [2 Mn t bullion of gold and.filver fo produced, by tbe melt* Minuet certa5,n ^mal1 quantities of the fame againft equal —weights taken from the refpefiive trial pieces of gold and filver that are depofited and kept in the exchequer for that ufe. This is called the trial of the pix ; the report made by the jury upon that trial is called the verdtB of the fix for that time ; and the indented trial pieces juil above mentioned, are certain plates of ffand- ard gold and ftandard filver, made with the greateft care, and delivered in upon oath, from time to time as there is occafion, by a jury of the mod able and • experienced goldfmiths, fummoned by virtue of a war- rant from the lords of the treafury to the wardens of the myflery of goldfmiths of the city of London for that purpofe ; and which plates being fo delivered in, are divided each, at this time, into feven parts by in¬ dentures, one of which parts is kept in his majefly’s court of exchequer at Wed minder, another by the fait! company of goldfmiths, and two more by the of¬ ficers of his majedy’s mint in the tower ; the remain¬ ing three being for the ufe of the mint, &c. in Scot¬ land. The pix has fometimes been tried every year, or even oftener, but fometimes not more than once in feveral years : and from hence is underdood how it comes to pafs, that, among the pieces that are dated us well as marked, three or more different dates are fometimes found upon pieces iropreffed with the fame mark : and again, that different marks are found upon pieces bearing the fame date. Thefe marks are fird obfervable upon the coins of King Edward III. ; the words above quoted concerning thofe marks are from the indentures made with the lord Hadings, mader and worker to _ King Edward IV.; and the marks themfelves continued to be damped very confpicuoudy upon the moneys, till the coinage by the mill and ferew was introduced and fettled after the Redoration, in the year 1662 : nnce which time, the moneys being made with far greater regularity and exaftnefs than before, thefe marks have either been totally kid afide, or fuch only have been ufed as are of a "more fecret nature, and only known to the officers and engravers concerned in the coinage : and indeed tbe condant praflice that has ever fince prevailed, of dating all the feveral pieces, has rendered all fuch marks of much lefs confequence than before. Mint. See Mentha, Botany and Materia Medic a, Index. MINI URNiE, a town of Campania, between Si- nueffa and Formiae. It was in tbe marlhes in this neigh¬ bourhood that Marius concealed himfelf in the mud to avoid the partizans of SyJla. The people condemned him to death 5 but when his voice alone had terrified the executioner, they Ihowed themfelves compaffionate and favoured his efcape. MINUET, a very graceful kind of dance, confiding ot a coupee, a high dep, and a balance ; it begins with a beat, and its motion is triple. The invention of the minuet feems generally to be aferibed to the French, and particularly to the inha¬ bitants of the province of Poiaou. The word is faid by Menage and Furetiere to be derived from the French menue or menu, “ fmall, or little;” and in ftnanefs fignifies a fmall pace. The melody of this dance confids of two ffrains, which, as being repeated, Rie called teprifest each having eight or more barsj but 3 78 ] M I Pv never an odd number. The meafure is three crotchets Minute in a bar, and is thus marked though it is commonly II performed in the time Walt her ipeaks of a minuet Vdade. ^ in Lully’s opera of Roland, each drain of which con-" v ^ tains ten bars, the fedlional number being 5 ; which renders it very difficult to dance. MINU FE, in Geo/netnj, the 60th part of a degree of a circle. Minute of Time, the 60th part of an hour. Minute, in ArchiteBure, ufually denotes the 60th, fometimes the 3°th, part of a module. See Archi¬ tecture. Minute is alfo ufed for a ffiort memoir, or Iketch of a thing taken in writing. MINUTIUS Felix. See Felix. MI NY An, a name given to the inhabitants of Or- chomenos in Boeotia, from Minyas king of the coun¬ try. O'rchomenos the fon of Minyas gave his name to the capital of the country; and the inhabitants dill retained their original appellation, in cqntradi- dinflion to the Orchoraenians of Arcadia. A colonv of Orchomenians paffed into Theffaly and fettled in lolchos; from which circumdance the people of the place, and particularly the Argonauts, were called Mmijce. This name they received, according to the opinion of iome, not becaufe a number of Orchomeni- ans had fettled among them, but becaufe the chi^F and nobled of them were defeended from the daughters ot Minyas. Part of the Orchomenians accompanied the Tons of Codrus when they migrated to Ionia. The defeendants of the Argonauts, as well as the Argo- nauts themfelves, received the name of Minyce. They fird inhabited Lemnos, where they had been born from the Lemnian women who had murdered their huffiands. They were driven from Lemnos by the Pelafgi, about 1160 before the Chridian era, and came to fettle in Laconia, from whence they paffed into Callifte with a colony of Lacedemonians. MIQUELETS, a name given to the Spaniards who inhabit the Pyrerean mountains on the frontiers of Arragon and Catalonia, and live by robbing. MIQUELON, a fmall defert idand to the fouth- wed of Cape May in Newfoundland, ceded to the French by tbe peace of 1763, for drying and curing their fiffi. W. Long. 54. 30. N. Lat. 47. 22. MIRx'ltBlLIS, Marvel of Peru ; a genus of plants belonging to the pentandria clafs ; and in the natural method ranking with thofe of which the order is doubtful. See Botany Index. MIRACLE, in its original fenfe, is a word of the fame import with wonder j but in its ufual and more appropriate fignification, it denotes “ an effedl con¬ trary to the edabhfhed conditution and courfe of things, or a fenfible deviation from the known laws of nature.” 1 hat the vifible world is governed by dated gene¬ ral rules, or that there is an order of caufes and ef- fetls edabliffied in every part of the fydem of nature which falls under our obfervation, is a fa6l which cannot be controverted. If the Supreme Being, as fome have fuppofed, be the only real agent in the univerfe, we have the evidence of experience, that, in the particular fydem to which we belong, he a£ts by dated rules. If he employs inferior agents to con- duft the .various motions from which the phenomena refult, we have the fame evidence that he has fubjeft- ed M I R [ 279 ] MIR Miracles, ed thofe agents to certain fixed laws, commonly called -—v—- the laws of nature. On. either hypothefis, eiFefls which are produced by the regular operation of thefe laws, or which are conformable to the eftablifhed courfe of events, are properly called natural; and every contradiction to this conilitution of the natural fyftem, and the correfpondent courfe of events in it, is called a miracle. If this definition of a miracle be juft, no event can be deemed miraculous merely becaufe it is ftrange, or even to us unaccountable \ fince it may be nothing more than a regular effe£l of fome unknown lavv of nature. In this country earthquakes are rare •, and for monftrous births perhaps no particular and fatis- fadlory account ran be given : yet an earthquake is as regular an effeft of the eftablifhed laws of nature as any of thofe with which wTe are moft intimately acquainted *, and under circumftances in which there would always be the fame kind of production, the monfter is nature’s genuine iffue. It is therefore ne- ceiTary, before we can pronounce any effeCt to be a true miracle, that the circumftances under which it is pro¬ duced be known, and that the common courfe of na¬ ture be in fome degree underftood ; for in ail thofe cafes in which we are totally ignorant of nature, it is impoffible to determine what is, or what is not, a deviation from its courfe. Miracles, therefore, are not, as fome have reprefented them, appeals to our ig¬ norance. They fuppofe fome antecedent knowledge of the courfe of nature, without which no proper judge¬ ment can be formed concerning thefti; though with it their realitv may be fo apparent as to prevent all pofti- bility of a difpute. Thus, were a phyfician to cure a blind man of a ca- taraft, by anointing his eyes with a chemical prepa¬ ration which we had never before feen, and to the na¬ ture and eftefls of which we are abfolute ftrangers, the cure would undoubtedly be wonderful; but we could net pronounce it miraculous, becaufe, for any thing known to us, it might be the natural effect of the operation of the unguent on the eye. But were be to recover his patient merely by commanding him to fee, or by anointing his eyes with fpittle, we fhouid with the utmoft confidence pronounce the cure to be a mi¬ racle 5 becaufe we know perfectly that neither the hu¬ man voice nor human fpittle have, by the eftablifhed conftituticn of things, any fuch power over the difeafes of the eye. No one is now ignorant, that perfons ap¬ parently dead are often reftored to their families and friends, by being treated in ihe manner recommended by the Humane Society. To the vulgar, and fome- times even to men of icience, thefe effects appear very wonderful; but as they are known to be produced by phyfical agency, they can never be confidered as mi¬ raculous deviations from the laws of nature. On the other hand, no one could doubt of his having witneffed a real miracle who had feen a perfon that had been four days dead come alive cut of his grave at the call of an¬ other, or who had even beheld a perfon exhibiting all the fymptoms of death inftantly refufeitated merely by being dejired to live. Thus eafy is it, in all cafes in which the courfe of nature is underftood, to determine whether any parti¬ cular event be really a miracle ; whilft in circumftances where we know nothing of nature and its courfe, even a true miracle, tvere it performed, could not be admit- Miracles, ted as fuch, or carry any conviflion to the mind of a v" 1 philofopher. If miracles be effects contrary to the eftablifhed con- ftitution of things, we are certain that they will never be performed on trivial occaftons. The conftitution of things was eftablifhed by the Creator and Governor of the univerfe, and is undoubtedly the offspring of infinite wifdom purfuing a plan for the beft of purpofes. From this plan no deviation can be made but by God himfelf, or by fome powerful being ailing with his permifiion. The plans devifed by wifdom are fteady in proportion to their perfection, and the plans of infinite wifdom muft be abfolutely perfeCt. From this confideration, fome men have ventured to conclude, that no miracle was ever wrought, or can rationally be expeCted j but maturer reflection muft foon fatisfy us that all fuch con- cluftons are hafty. Man is unqueftionably the principal creature in this world, and apparently the only one in it who is ca¬ pable of being made acquainted with the relation in which he Hands to his Creator. We cannot, therefore, doubt, but that fuch 4of the laws of nature as extend not their operation beyond the limits of this earth were eftablifhed chiefly, if not folely, for the good of man¬ kind ; and if, in any particular circumftances, that good can be more effectually promoted by an occafional de¬ viation from thole laws, fuch a deviation may be rea- fonably expeCted. Were man, in the exercife of his mental and corporeal powers, fubjeCted to the laws of phyfical neceftity, the circumftances fuppofed would in¬ deed never occur, and of courfe no miracle could be ad¬ mitted. But fuch is not the nature of man. Without repeating what has been faid elfewhere (See Metaphysics, Part III. Chap. V.) of neceftity and liberty, we (hall here take it for granted, that the relation betw’een motives and aClions is different from that between caufe and effeft in phyfics *, and that, mankind have fuch command over themfelves, as that by their voluntary conduCt, they can make themfelves in a great degree either happy or miferable. We know likewife from hiftory, that, by fome means or other, al- moft all mankind were once funk into the groffeft igno¬ rance of the moft important truths; that they knew not the Being by whom they were created and fupported ; that they paid divine adoration to flocks, ftones, and the vileft reptiles ; and that they were flaves to the moft; impious, cruel, and degrading fuperftitions. From this depraved ilate it was furely not unworthy of the common “ Father of all” to refeue his helplel's creature, to enlighten their underftandings that they might perceive what is right, and to prefent to them motives of fufticient force to engage them in the prac¬ tice of it. But the underftandings of ignorant bar¬ barians cannot be enlightened by arguments ■, becaufe of the force of fuch arguments as regard moral fcience they are not qualified to judge. The philofophers of Athens and Rome inculcated, indeed, many excellent moral precepts, and they fometimes ventured to ex- pofe the abfurdities of the reigning fuperftition : but their ledlures had no influence upon the multitude ; and they had themfelves imbibed fuch erroneous no¬ tions refpefling the attributes of the Supreme Being, and the nature of the human foul, and converted thofe notions into firft principles, of which they would not permit ■. MIR [ 280 ] M I R acles. permit an examination, that even among them a tho- v rough reformation was not to be expected from the powers of reafoning. It is Hkevvife to be obferved, that there are many truths of the utmoft importance to mankind, which unaffiifed reafon could never have dif- covered. Atnongft thefe we may confidently reckon the immortality of the foul, the terms upon which God will he reconciled to tinners, and the manner in which that all-perfedl Being may be acceptably worthipped ; about all of which phil fimhers wrere in fuch uncer¬ tainty, that, according to Plato, “ Whatever is let right, and as it Ihould , the preient evil ftate of the world, can be fo only by the particular interpolition of God (a). An immediate revelation from Heayen, therefore, was the only method by which infinite wifdom and perfedl goodnefs could reform a bewdldered and vici¬ ous race. But this revelation, at whatever time we fuppofe it given, mufi: have been made directly either to lome chofen individuals commiflioned to inftruft others, ©r to every man and woman for whofe benefit it was ultimately intended. Were every perfon inftru6ted in the knowledge of his duty by immediate infpiration, and were the motives to practife it brought home to his - mind by God himfelf, human nature would be wholly changed : men would not be roafters of their own ac¬ tions j they wTould not be moral agents, nor by con- fequence be capable either of reward or of punilhment. It remains, therefore, that if God has been gracioully pleafed to enlighten and reform mankind, without deftroying that moral nature which is effential to vir- ture, he can have done it only by revealing his truth to certain chofen inftruments, who were the immediate inltruftors of their contemporaries, and through them have been the in(tru<5fors of fucceeding ages. Let us fuppofe this to have been actually the cafe, and confider how thofe infpired teachers could commu¬ nicate to others every truth which had been revealed to themfelves. They might eafily, if it was part of their duty, deliver a fublime fyilem of natural and moral fcience, and eftablilh it upon the common bafis of ex¬ periment and demonftration ; but what foundation could they lay for thofe truths which unaffilted reafon cannot difeoyer, and which, when they are revealed, appear to have no neceffary relation to any thing pre- vioufiy known ? To a bare affirmation that they had been immediately received from God, no rational be¬ ing could be expefted to affent. The teachers might be men of known veradity, whofe Ample affertion would be admitted as fufficient evidence for any fadt in conformity with the laws of nature j but as every man has the evidence of his own confcioufnefs and ex¬ perience that revelations from heaven are deviations from thefe laws, an affertion fo apparently extravagant ■would be rejedled as falfe, unlefs fupported by lome better proof than the mere affirmation of the teacher. In this Hate of things, we can conceive no evidence fufficient to make fuch dodfrines be received as the truths of God, but the power of working miracles committed to him who taught them. This would, (a) Ei> UGtvciv, 0 rt 7rs§ craQr, « kki yeytflxi city £)e Repub. ho. vi. indeed, be fully adequate to the purpofe. For if there M'racle^ were nothing in the dodirines themfdves impious, im- ——y-— moral, or contrary to truths already known, the only thing which could render the teacher’s afiertion incre¬ dible, would be its implying fuch an intimate commu¬ nion with Gud as is contrary to the efiabliffied courfe of things, by vvhich men are left to acquire all their knowledge by the exercife of their own faculties.—— Let us now fuppofe one of thofe infpired teachers to tell his countrymen, that he did not defire them, on his ip/e dixit, to believe that be bad any preternalu il cemmunion with the Deity, but that for the truth of his alfertion he would give them the evidence or dieir Own fenfes; and after this declaration let us fuppo'e him immediately to raife a perlon from the dead in their prefence, merely by calling upon him to come out of his grave. Would not the only poffible objec-. tion to the man’s veracity be removed by this miracle ? and his affections that he had received fuch and fuch do&rines from God be as fully credited, as if it related to the molt common occurrence ? Undoubtedly it would ; for when fo much preternatural power was vi- fibly communicated to this perfon, no one could have reafon to queltion his having received an equal portion of preternatural knowledge. A palpable deviation from the known laws of nature, in one inftance, is a fenfible proof that.fuch a deviation is poffible in another j and in fuch a cafe as this, it is the witnefs of God to the truth of a man. Miracles, then, under which we include prophecy, are the only direft evidence which can be given of di¬ vine infpiration. When a religion, or any religious truth, is to be revealed from heaven, they appear to be abfolutely neceffary to enforce its reception among men} and this is the only cafe in wffiich we can fuppofe them neceffary, or believe for a moment that they ever have been or will be performed. The hiltory of altffoft every religion abounds witli relations of prodigies and wonders, and of the inter- courfe of men with the gods } but we know of no re¬ ligious fyftem, thofe of the Jews and Chriftians ex¬ cepted, which appealed to miracles as the foie evidence of its truth and divinity. The pretended miracles mentioned by Pagan hifforians and poets are not faid to have been publicly wrought to enforce the truth of a new religion contrary to the reigning idolatry. Many of them may be clearly ffiown to have been mere natu¬ ral events} (fee Magic.) Others of them are repre- fented as having been performed in fecret on the moft trivial occafions, and in obfeure and fabulous ages long prior to the era of the writers by whom they are re- > corded. And fuch of them as at firft view appear to be beft attelled, are evidently tricks contrived for intereft- ed purpofes} to flatter power, or to promote the pre¬ vailing furperftitions. For thefe reafons, as well as on account of the immoral charafter of the divinities by whom they are faid to have been wrought, they are al¬ together unworthy of examination, and carry in the very nature of them the completefl: proofs of falfehood and impollure. But 1, £'/) Tttscvh) KcPxrlxtru TroXnuw. Qicv ftogxv ct-Sjc 1 MIR [ sSr ] MIR Miracle. But the miracles recorded of Mofes and of Chrift v bear a very different chara&er. None of them is re- prefented as wrought on trivial occafions. The waiters who mention them were eye witneffes of the faftsj which they affirm to have been performed publicly, in atteffa- tion of the truth of their refpe£live fyftems. They are indeed fo incorporated with thefe fyftems, that the mi¬ racles cannot be feparated from the dodlrines j and if the miracles wrere not really performed, the doctrines cannot poflibly be true. Befides all this, they were wrought in fupport of revelations which oppofed all the religious fyllems, fuperftitions, and prejudices, of the age in which they were given : a circumftance which of it- felf fets them, in point of authority, infinitely above the Pagan prodigies, as well as the lying wonders of the Romiffi church. It is indeed, we believe, univerfally admitted, that the miracles mentioned in the book of Exodus and in the four Gofpels, might, to thofe who faw them per¬ formed, be fufficient evidence of the divine infpiration of Mofes and of Chriff: ; but to us it may be thought that they are no evidence whatever, as wTe muff; be¬ lieve In the miracles themfelves, if wre believe in them at all, upon the bare authority of human teftimony. Why, it has been fometimes alked, are not miracles wrought in all ages and countries ? If the religion of Chrifl; was to be of perpetual duration, every generation of men ought to have complete evidence of its truth and divinity. To the performance of miracles in every age and in every country, perhaps the fame objedlions lie as to the immediate infpiration of every individual. Were thofe miracles univerfally received as fuch, men wrould be fo overwhelmed with the number rather than with the force of their authority, as hardly to remain ma¬ ilers of their own condu£l j and in that cafe the very end of all miracles would be defeated by their frequency. The truth, however, feems to be, that miracles fo fre¬ quently repeated would not be received as fuch, and of courfe wrould have no authority •, becaufe it wrould be difficult, and in many cafes impofiible, to diffinguifh them from natural events. If they recurred regularly at certain intervals, we could not prove them to be de¬ viations from the knowm lawrs of nature, becaufe we fhould have the fame experience for the one feries of events as for the other; for the regular fucceffion of preternatural effedls, as for the eftabliffied conftitution and courfe of things. Be this, however, as it may, we ihall take the li¬ berty to affirm, that for the reality of the Gofpel mi¬ racles we have evidence as convincing to the reflecting mind, though not fo ftriking to vulgar apprehenfion, as thofe had wrho were contemporary with Chrifl; and his apoftles, and aClually faw’ the mighty works wdiich he performed. To the admirers of Mr Hume’s phi- lofophy this affertion will appear an extravagant para¬ dox •, but we hope to demonftrate its truth from prin¬ ciples which, confiffently with himfelf, that author could not have denied. He has indeed endeavoured ^Ejaycn to prove *, that “no teftimony is fufficient to efta- Muacles. blifh a miracle and the reafoning employed for this purpofe is, that “ a miracle being a violation of the laws of nature which a firm and unalterable experi¬ ence has eftabliffied, the proof againft a miracle, from the very nature of the fa£l, is as entire as any argu- Vol. XIY. Part 1. ment from experience can be ; whereas cur experience Miracle, of human veracity, which (according to him) is the •—' foie foundation of the evidence of teflimony, is far from being uniform, and can therefore never prepon¬ derate againft that experience w hich admits of no ex¬ ception.” This boafted and plaulible argument has with equal candour and acutenefs been examined by Dr Campbell f, w’ho juffly obferves, that fo far is t DifTerta- experience from being the foie foundation of the ev\-tio,1°n dence of teftimony, that, on the contrary, teftimony ^liracles- is the foie foundation of by far the greater part of what Mr Hume calls firm and unalterable experience ; and that if in certain circumftances we did not give an implicit faith to teftimony, our knowldge of events W'ould be confined to thofe which had fallen under the immediate obfervation of our own fenfes. For a ffiort view' of this celebrated controverfy, in which the Chri- ftian fo completely vanquiihes the philofopher, fee the word Abridgment. But though Dr Campbell has expofed the fophiftry of his opponent’s reafoning, and overturned the ciples from which he reafons, we are perfuaded that he might fafely have joined iffue with him upon thofe very principles. To us, at lead, it appears that the teftimony upon which we receive the Gofpel miracles is precifely of that kind which Mr Hume has acknow¬ ledged fufficient to eftablifh even a miracle. “ No teftimony (fays he) is fufficient to eftablifh a miracle, unlefs the teftimony be of fuch a kind that its falfe- hood would be more miraculous than the fa£t which it endeavours to eftablilh. When one tells me that he faw a dead man reftored to life, I immediately confi- der with myfelf whether it be more probable that this perfon fhould either deceive or be deceived, or that the faift which he relates ftiould really have happened. I weigh the one miracle againft the other; and ac¬ cording to the fuperiority which I difeover, I pronounce my decifion, and always rejeft the greater miracle.” In this paffage every reader may remark wffiat did not efcape the perfpicacious eye of Dr Campbell, a ftrange confufion of terms} but as all miracles are equally eafy to the Almighty ; and as Mr Hume has elfewhere ob- ferved, that “ the raifing of a feather, when the wind w'ants ever fo little of a force requifite for that pur¬ pofe, is as real a miracle as the raifing of a houfe or a fhip into the aircandour obliges us to fuppofe, that by talking of greater and lefs miracles and of always reje&ing the greater, he meant nothing more, but that of two deviations from the known laws of nature he always rejefts that which in itfelf is leaft probable. If, then, w'e can fhow that the teftimony given by the apoftles and other firft preachers of Chriftianity to the miracles of their mafter would, upon their fuppofi- tion that thofe miracles were not really performed, have been as great a deviation from the known laws of nature as the miracles themfelves, the balance muff; be confi- dered as evenly poifed by oppofite miracles *, and wdiilft it continues fo, the judgement muff: remain in a ftate of fufpenfe. But if it (hall appear, that in this cafe the falfe teftimony would have been a deviation from the laws of nature lefs probable in itfelf than the miracles recorded in the Gofpels, the balance will be inftantly de- ftroyed ; and by Mr Hume’s maxim we fhall be obliged to reject the fuppofition of falfehood in the teftimony N n of M I H [ 2;* Miracle, of the apoftles, and admit the miracles of Chnfl'to have been really performed. In this argument we need not wafle time in proving that thofe miracles, as they are reprefented in the writ¬ ings of the New Teftnment, were of fuch a nature, and performed before fo many witneffes, that no impoiition could poffibly be prafiited on the fenies of thofe who affirm that they were prefent. From every page of the Gofpels this is fo evident, that the philofophical adverfaries of the Chriflian faith never fuppofe the apo- jfles to have been themfelves deceived, but boldly ac- cufe them of bearing falfe witnefs. But if tnis accufa- tion be weli founded, their teftimony itfelf is as great a » miracle as any which they reoord of themfelves or of their Mafter. It has been fhown elfewherc (fee Metaphysics, N° r^S.), that by the law of affociation, which is one of the laws of nature, mankind, in the very procefs of learning to fpeak, neceffarily learn to fpeak the truth •, that ideas and relations are in the mind of every man fo clofely aflfociated with the words by which they are ex- preffsd in his native tongue, and in every other lan¬ guage of which he is matter, that the one cannot be en¬ tirely feparated from the other ; that therefore no man can on any occafion fpeak falfehood witiiout fome ef¬ fort ; that by no effort can a man give conliftency to a unpremeditated detail of falfehood, if it be of any length, and include a number of particulars } and that it is i’till lefs poffible for feveral men to agree in fuch a detail, when at a diftance from each other, and crofs quefiion- ed by their enemies. This being the cafe, it follows, if the teftimony of the apoftles to their own and their Matter’s miracles be falfe, either that they mutt have conceited a con- fiftent fcheme of falfehood, and agreed to publitti it at every hazard ; or that God, or fame powerful agent appointed by him, mutt have dilfolved all/ the aflfocia- tions formed in their minds between ideas of fenfe and the wmrds of language, and arbitrarily formed new af- fociations, all in exadf conformity to each other, but all in direct contradiction to truth. One or other of thefe events mutt have taken place •, becaufe, upon the fup- polition of falfehood, there is no other alternative. But fuch a diffblution and formation of aflbeiations as the latter implies, muft, to every man who ihall attentively confider it, appear to be as real a miracle, and to re¬ quire as great an exertion of power, as the refurreftion of the dead. Nor is the fuppofed voluntary agreement of the apottles in a fcheme of falfehood an event lefs mi¬ raculous. When they fat down to fabricate their pre¬ tended revelation, and to contrive a feries of miracles to which they were unanimoufly to appeal for its truth, it is plain, ftnce.they proved fuccefsful in their daring enterprife, that they mutt have clearly forefeen every poffible circumttance in which they could be placed, and have prepared confident anfwers to every queftion that could be put to them by their moft inveterate and moft enlightened enemies ; by the ftatefman, the lawyer, the philofopher, and the prieft. That fuch foreknow¬ ledge as this would have been miraculous, will not fine¬ ly be denied ; fince it forms the very attribute which we find it moil difficult to allow even to God himielf. It is not, however, the on/y miracle which this fuppof- tion would compel us to fwallow. The tfery refolution of the apottles to propagate the belief of falfe miracles j ] M I U in fupport of fuch a religion as that which is taught in the New Teftament, is as great a miracle as human imagination can eaftly conceive. When they formed this defign, either they mutt have hoped to fucceed, or they mutt have forefeen that they fliould fail in their undertaking ; and in either cafe, they chafe evil for its own fake. They could not, if they forefaw that they ftiould fail, look for any thing but that contempt, difgrace, and perfecution, which were then the inevitable confequences of an unfuccefs- ful endeavour to overthrow the eftahlilhed religion. Nor could their profpedts be brighter upon the fuppoft- ticn of their fuccefs. As they knew themfelves to be falfe witneffes and impious deceivers, they could have no hopes beyond the grave •, and by determining to cp- pofe all the religious fyitems, fuperftitions, and preju¬ dices of the age in which they lived, they wilfully ex- pofed themfelves to inevitable milery in the prefent life, to infult, and imprifonment, to ftripes and death. Nor can it be faid that they might look forward to power and affluence when they fflould, through fufferings, have converted their countrymen 5 for fo delirous were they of obtaining nothing but mifery, as the end of their miffion, that they made their own perfecution a teft of the truth of their doffrines. They introduced the Ma¬ tter from whom they pretended to have received thefe doclrines as telling them, that “ they were fent forth as ftieep in the midft of wolves ; that they ihouid be deli¬ vered up to councils, and fcourged in fynagoguesj that they ttiould be hated of all men for his name’s fake j that the brother fliould deliver up the brother to death, and the father tbe child ; and that he who took not up his crofs and followed after him was not worthy of him.” The very fyftem of religion, therefore, which they invented and refolved to impofe upon mankind, was fo contrived, that the worldly profperity of its firtt. preachers, and even their exemption from perfecution, w7as incompatible with its iuccefs. Had thefe clear pre¬ dictions of the Author of that religion, under whom the apottles acted only as minifters, not been verified, all mankind muft have inftantly perceived that their pre¬ tence to infpiration was falfe, and that Chriftianity was a foandalous and impudent impofture. Ail this the apoftles could not but forefee when they formed their plan for deluding the world. Whence it follows, that when they refolved to fupport their pretended revela¬ tion by an appeal to forged miracles, they wilfully, and with their eyes open, expofed themfelves to inevitable mifery, whether they ttiould fucceed or fail in their en¬ terprife ; and that they concerted their meafures fo as not to admit of a poffibility of recompenfe to themfelves, either in this life or in that which is to come. But if there be a law of nature, for the reality of which we have better evidence th^n ive have for others, it is, that “ no man can choofe mifery for its own fakef or make the acquilition of it the ultimate end of his purfuit. The exiftence of other laws of nature we know by tef- timony and our own obfervation of the regularity of their efFeifts. The exiftence of this law is made known to us not only by thefe means, but alfo by the ftill clearer and more conclufive evidence of our own con- feioufnefs. Thus, then, do miracles force themfelves upon our affent in every poflible view which we can take of this interefting fubjeft. If the tettimony of the firft preacher Mii'acle. MIR [2 Miracle preachers of Chriftianity was true, the miracles record- K ed in the Gofpel were certainly performed, and the doc- Mirandola.tr-nes of our rejjg5on are derived from heaven. On the other hand, if that teilimony was falfe, either God mult have miraculoufly effaced from the minds of thofe by whom it was given all the affociations formed between their fenfible ideas and the words of language, or he mult have endowed thofe men frith the gift of prefci- enee, and have impelled them to fabricate a pretended revelation for the purpofe of deceiving the world, and involving themfelves in certain and forefeen de¬ ft rudtion. The power neceffary to perform the one feries of thefe miracles may, for any thing known to us, be as great as that which would be requifite for the perform¬ ance of the other •, and, confidered merely as exertions of preternatural power, they may feem to balance each other, and to hold the mind in a ftate of fufpenfe. But when we take into confideration the difterent purpofes for which thefe oppofite and contending miracles were wrought, the balance is inftantly deftroyed. The mi¬ racles recorded in the Gofpels, if real, were wrought in fupport of a revelation which, in the opinion of all by W'hom it is received, has brought to light many import¬ ant truths which could not otherwife have been made known to men } and which, by the confeflion of its ad- verfaries, contains the pureft moral precepts by w7hich the condudl of mankind w7as ever direffed. The oppo¬ fite feries of miracles, if real, was performed to enable, and even to*compel, a company of Jews, of the loweft rank and of the narroweft education, to fabricate, with the view of inevitable deftruftion to themfelves, a con- fiftent fcheme of falfehood, and by an appeal to forged miracles to impofe it upon the world as a revelation from heaven. The objeft of the former miracles is worthy of a Gad of infinite w'ifdom, goodnefs, and power. The objeft of the latter is abfolutely inconfift- ent with wifdom and goodnefs, which are demonftrably attributes of that Being by whom alone miracles can be performed. Whence it follows, that the fuppofition of the apoftles bearing falfe teftimony to the miracles of their Matter, implies a feries of deviations from the laws of nature, infinitely lefs probable in themfelves than thofe miracles : and therefore by Mr Hume’s maxim, we muft neceflarily reje<5l the fuppolition of faifehood in the teftimony, and admit the reality of the miracles. So true it is, that for the reality of the Gofpel miracles we have evidence as convincing to the reflecting mind, as thofe had who w'ere contemporary with Chrift and his apoftles, and were aftual witneffes to their mighty works. MIRANDA-DE-Ebro, a town of Spain, in Old Caftile, with a ftrong cattle 5 feated in a country that produces excellent wine. W. Long. 3. 10. N. Lat. 42. 52. MIRANDO-DE-Douro, or Duero, a ftrong town of Portugal, and capital of the province of Tra-los- Montes, with a bifRop’s fee. It is well fortified, and feated on a rock near the confluence of the rivers Douro and Frefna. W. Long. 5. 40. N. Lat. 41. 30. MIR ANDO LA, a town of Italy, and capital of a duchy of the fame name, fituated between the duchies of Mantua and Modena j is well fortified, and has alfo a ftrong citadel and fort. It has been fevcral times ta¬ ken and retaken. E. Long. 11. 5. N. Lat. 44. 52. 83 ] Mis MIRIAM, fifter of Aaron and Mofes, makes trvo Mxnaaf or three remarkable appearances in Scripture. It was owing to her that her mother wras employed by Pha- ture raoh’s daughter as nurfe to Mofes. She put herfelf —v— at the head of the women of Ifrael after their paflage through the Red !ea, in order to ftng the fong which the men had fung before. She joined with her bro¬ ther Aaron in murmuring againft Mofes, and was fe- verely chaftifed for that adlion ; for (he became leprous, and continued feparate from the r wore his own hair, which like his expences was very fmall. All this time the income of Mr Elwes was increaf- ing hourly, and his prefent expenditure was next to nothing ; for the little pleafures he had once engaged in he had now given up. He kept no houfe, and only one old fervant and a couple of horfes : he refided with his nephew : his two fons he had flationed in Suffolk and Berkfhire, to look after his refpedlive eftates: and his drefs certainly was no expence to him ; for had not other people been more careful than himfelf, he would not have had it even mended. When he left London, he went on horfeback to his country feats with his couple of hard eggs, and with¬ out once flopping upon the road at ary houfe. He always took the moft unfrequented road, and ufed every fhift to avoid turnpikes. Marcham was the feat he now chiefly vifited ; which hnd fome reafon to be flattered with the preference, as his journey into Suf¬ folk coft him only twopence-halfpeny, while that into Berkfhire amounted to fourpence ! As Mr Elrves came into parliament without ex¬ pence, he performed his duty as a member would have done in the pure days of ouj: conffitutioni What he had not bought he never attempted to fell; and he went forward in that ftraight and direft path, which can alone fatisfy a reflefting mind. Amonglt the frnaller memorials of the parliamentary life of Mr Elwes may be noted, that he did not follow the cu- flom of members in general by fitting on any parti¬ cular fide of the houfe, but fat as occafion prefented itfelf on either indifcriminately ; and he voted much in the fame manner, but never rofe to fpeak. In his attendance at the houfe, he was always early and late $ and he never left it for dinner, as he had accuflomed himfelf to falling, fometimes for 24 hours in conti¬ nuance. When he quitted parliament, he was, in the com¬ mon phrafe, “ a fifh cut of water!” The fiyle of Mr Elvves’s MIS [2 Mifer. Elwes’s life had left him no domeftic fcenes to which v he could retire—his home was dreary and poor—his rooms received no cheerfulnefs from fire y and while the outfide had all the appearance of a “ Houfe to be Let,” the infide was a defert; but he had his penury alone to thank for this, and for the want of all the little confolations which fhould attend old age, and fmooth the paffage of declining life. At the clofe of the fpring of 1785, he wilhed again to vifit, which he had not done for fome years, his feat at Stoke. .But then the journey was a moft ferious obje£l to him. The famous old fervant was dead ; all the hcrfes that remained xvith him were a couple of worn-out brood mares ; and he himfelf was not in that vigour of body in which he could ride 60 or 70 miles on the fufle- nance of two boiled eggs. The mention of a poll chaife would have been a crime—“ He afford a poll chaife, indeed ! where was he to get the money ?” would have been his exclamation. At length he was carried into the country as he was carried into parliament, free of expence, by a gentleman who was certainly not quite fo rich as Mr Elwes. When he reached Stoke—the feat of more affive fcenes, of fomewhat re- fembling hofpitality, and where his fox hounds had fpread fomewdiat like vivacity around—he remarked, he had expended a great deal of money once very fooliflily j but that a man grew' wifer by time.” The rooms at this feat, which were now much out of repair, and would have all fallen in but for his fon John Elwes, Efq. who had refided there, he thought too expenfively furnifhed, as worfe things might have ferved. If a window was broken, there was to be no repair but that of a little'brown paper, or that. of piecing in a bit of broken glafs j wdiich had at length been done fo frequently, and in fo many fhapes, that it would have puzzled a mathematician to fay “ what figure they defcribed.” To fave fire, he would walk about the remains of an old greenhoufe, or fit with a fervant in the kitchen. During the harveft he xvould amufe himfelf with going into the fields to glean the corn on the grounds of his own tenants ; and they ufed to leave a'little more than common to pleafe the old gentleman, who was as eager after it as any pau¬ per in the parilh. In the advance of the feafon, bis morning employment was to pick up any ftray chips, bones, or other things, to carry to the fire, in his pocket—and he was one day furprifed by a neighbour¬ ing gentleman in the aft of pulling down, with fome difficulty, a crow’s neft for this purpofe. On the gentleman xvondering why he gave himfelf this trou¬ ble—“ Oh, Sir, (replied old Elwes), it is really a ffiame that thefe creatures ffiould do fo. Do but fee what walle they make ! They don’t care how extravagant they are !■” As no gleam of favourite paffion, or any ray of amufement, booke through this gloom of penury, his infatiable defire of faving was now become uniform and fyftematic. He ufed Hill to ride about the coun¬ try on one of thefe mare?—but then he rode her very economically, on the foft turf, adjoining the road, without putting himfelf to the expence of {hoes, as he obferved, “ The turf was fo pleafant to a hcrfe’s foot !” And when any gentleman called to pay him a vifit, and" the boy who attended in the ftables was profufe enough to put a little hay before his horfe; old Ehves 87 ] MIS would ffily fteal back into the liable, and take the hay very carefully away. That very ftrong appetite which Mr Elwes had in fome meafure reftrained dur¬ ing the long fitting of parliament, he now indulged moft voracioully, and on every thing he could find. To (ave, as he thought, the expence of going to a butcher, he would have a whole ffieep killed, and fo eat mutton to the—end of the chapter. When he oc- cafionally had his river drawn, though fometimes horle loads of fmall fifti were taken, not one would he fuf- fer to be thrown in again; for: he obferved, He ftiould never fee them again !”' Game in the laft ftate of putrefaction, and meat that walked about his platey would he continue to eat, rather than have new things killed before the old provifion was finiffied. With this diet—the charnel houfe offufenance—his drefs kept pace—-equally in the laft ftage of abfolule dijfolution. Sometimes he would walk about in a tattered brown- coloured hat, and fometimes in a red and white wool¬ len cap, like a prifoner confined for debt. His {hoes he never would fuffer to be cleaned, left they fhould be worn out the fooner. But ftill, with all this felf-denial—that penury of life to which the in¬ habitant of an alms houfe is not doomed—ftill did he think he was profufe, and frequently fay, “ He muft be a little more careful of his property.” His difquietude on the fubjeCt of money was now conti¬ nual. When he went to bed, he would put five or ten guineas into a bureau ; and then, full of his mo- .ney, after he had retired to reft, and fometimes in the middle of the night, he would come down to fee if it was there. • The feene of mortificaTion at which Mr Elw7es was now arrived was all but a denial of the common ne- ceffaries of life : and indeed it might have admitted a doubt, whethel or not, if his manors, his fi(h ponds, and fome grounds in his own hands, had not furniftied a fubliftence, where he had not any thing actually to buy, he would not, rather than have bought any thing, have ftarved. Strange as this may appear, it is not ex¬ aggerated.—He one day, during this period, dined upon the remaining part of a moor hen, which had been brought out of the river by a rat ! and at another ate an undigefted part of a pike which a larger one had fwallowed, but had not finilhed, and which were taken in this ftate in a net. At the time this laft circumftance happened, he efifeovered a ftrange kind of fatisfaClion ; for he faid to a friend, “ Aye ! this xvas killing two birds with one fione !” In the room of all comment-— of all moral—let it be remarked, that at this time Mr Elwes was perhaps worth nearly hundred thoufand pounds ! and, at this period, he had not made his will, of courfe was not faving from any fentiment of aftedion , for any per fon. The fummer of 1788 Mr Elwes pafled at his houfe in Welbeck ftreet, London ; and he paffed that fum¬ mer without any other fociety than that of two maid fervants; for he had now given up the expence of keeping any male domeftic. . His chief employment ufed to be that of getting up early in a morning to vifit fome of his houfes in Mary-le-bone, xvhich during the fum¬ mer were repairing. As he was there generally at , four o’clock in a morning, he was of courfe on the fpot before the workmen ; and he ufed contentedly to fit.down on the fteps before the door, to fcold them, t MIS r 288 1 M I s them when they did . come. The neighbours who ufed to fee him appear thus regularly every morning, and who concluded, from his apparel, that he was one of the workmen, obferved, “ there never was io punctual a man as the old carpenter.” During the whole morn¬ ing he wTould continue to run up and down flairs to fee the men were not idle for an inftant, with the fame an¬ xiety as if his whole happinefs in life had been centered in the finifhing of this houfe, regardlefs of the greater property he had at a flake in various places, and for ever employed in the minutice only of affairs. Indeed fuch was his anxiety about this houfe, the rent of which was not above 50I. a-year, that it brought on a fever which nearly coff him his life : but the fate which drag¬ ged him on thus ftrangely to bury him under the load of his own wealth, feemed as refifflefs as it was unac¬ countable. In the mufcular and unencumbered frame of Mr Ehves there was every thing th it premifed extreme length of life \ and he lived to above 70 years of age without any natural, diforder attacking him : but, as Lord Bacon has well obferved, “ the minds of fome men are a lamp that is continually burning and fuch was the mind of Mr Elwes.^ Removed from thofe cccafional public avocations wdiich had once engaged his attention, money was nowr his only thought. He rofe upon money—upon money he lay down to reft ; and as his capacity funk away from him by degrees, he dwindled from the real c?.res of his property into the puerile concealment of a few guineas. This little ftore he would carefully wrrap up in various papers, and de- pofiting them in different corners, would amufe him- felf with running from one to the other, to fee whe¬ ther they were all fafe. Then forgetting, perhaps, where he had concealed fome of them, he would be¬ come as ferioufly afflidled as a man might be who had loft all his property. Nor was the day alone thi& fpent—-he would frequently rife in the middle of the night, and be heard walking about different parts of the houfe, looking after what he had thus hidden and forgotten. During the winter of 1789, the laft winter Mr El- wes was fated to fee, his memory vifibly weakened every day ; and from the unceafing wi(h to fave money, he now began to fear he ftiould die in want of it. Mr Gibfon had been appointed his builder in the room of Mr Adams; and one day, when this gentleman wait¬ ed upon him, he faid with apparent concern, “ Sir, pray confider in w hat a wretched flate I am $ you fee in what a good houfe I am living j and here are five guineas, which is all I have at prefent 5 and how I ftiall go on with fuch a fum of money puzzles me to death. I dare fay you thought I was rich j now you fee how7 it is !” Mr George Elwes having now fettled at his feat at Marcham in Berkfliire, he w7as naturally defirous that, in the affiduities of his wnfe, his father might at length find a comfortable home. In London be was certain¬ ly moft uncomfortable : but ftill, with thefe tempta¬ tions before and behind him, a journey wnth any ex¬ pence annexed to it was infurmountable. This, how¬ ever, w7as luckily obviated by an offer from Mr Partis, a gentleman of the law, to take him to his ancient feat in Berklhire with his purfe perfectly whole. But there was one circumflance ftill very diftreffing—the 2 old gentleman had now nearly worn out his laft coat, Mifer and he would not buy a new one ; his fon, therefore, If. with a pious fraud, contrived to get Mr Partis to buy ‘ f^e" him a coat and make him a prefent of it. Thus for- merly having had a good coat, then a bad one, and at laft no coat at all, he was kind enough to accept one from a neighbour. Mr Elwes carried with him into Berkfhire five gui¬ neas and a half, and half a crown. Left the mention of this fum may appear lingular, it Ihould be faid, that previous to his journey he had carefully wrapped it up in various folds of paper, that no part of it might be loft. On the arrival of the old gentleman, Mr George Elwes and his wife did every thing they could to make the country a fcene of quiel! to him. But “ he had that wTithin” which baffled every effort of this kind. Of his heart it might be faid, “ there was no peace in Ifrael.” His mind, call aw7ay upon the vaft and troubled ocean of his property, extending beyond the bounds of his calculation, returned to a- mufe itfelf with fetching and carrying about a few gui¬ neas, which in that ocean was indeed a drop. But na¬ ture had now carried on life nearly as far as Ihe was able, and the fand w7as almoft run out. The firft fymp- tom of more immediate decay was his inability to enjoy his reft at night. Frequently would he be heard at midnight as if ftruggling with fome one in his cham¬ ber, and crying out, “ I will keep my money, I will j nobody (hall rob me of my property.” On any one of the family going into his room, he would ftart from this fever of anxiety, and, as if waking from a troubled dream, again hurry into bed, and feem uncon- fcious of w7hat had happened. At length, on the 26th November 1789, expired this miferably rich man, whofe property, nearly reaching to a million, extended itfelf almoft through every county in England. MISERICORDIA, in Law, is an arbitrary fine impofed on any perfon- for an offence : this is cal'n d mifericordia, becaufe the amercement ought to be but fmall, and lefs than that required by magna charta. If a perfon be outrageoufly amerced in a court that is not of record, the writ called moderata mifericordia lies for moderating the amercement according to the nature of the fault. MISFORTUNE. An unlucky accident. Misfortune, or chance, in Law, a deficiency of the will j or committing of an unlawful a£t by misfor¬ tune or chance, and not by defign. In fuch cafe, the will obferves a total neutrality, and does not co-operate with the deed ; wThich therefore wants one main ingre¬ dient of a crime. See Crime. Of this, when it affedls the life of another, we have fpoken under the article Homicide j and in this place have only occafion to obferve, that if any accidental mifcbicf happens to follow from the performance of a lawful a£f, the party Hands excufed from all guilt: but if a man be doing any thing unlawful, and a confe- quence enfues which he did not forefee or intend, as the death of a man or the like, his want of forefight lhall be no excufe j for, being guilty of one offence, in doing antecedently what is in itfelf unlawful, he is criminally guilty of whatever confequence may follow the firft mifbehaviour. MISFEASANCE, in law books, fignifies a tref- pafs. MISLETOE, Miiletoe il Mifprifion. MIS [ MISLETOE. See Viscum, Botany index. MISNOMER, in Lavo, a mifnaming or miftaking a perfen’s name. The Chriftian name of a perfon ftiould always be perfect ; but the law is not fo ftrifl in regard to furnames, a fmall millake in which will be dii'penfed with to make good a contraft, and fupport the act of the party. See Plea to IndiElment. MISPRISIONS, (a term derived from the old French, mefyris, a negleft or contempt), are, in the acceptation of our law, generally underftood to be all fuch high offences as are under the degree of capital, but nearly bordering thereon : and it is faid, that a mifprifion is contained in every treafon and felony what- foever; and that, if the king fo pleafe, the offender may be proceeded againft for the mifprifion only. And upon the fame principle, while the jurifdidtioa of the flar- chamber fubfiiled, it was held that the king might re¬ mit a profecution for treafon, and caufe the delinquent to be cenfured in that court, merely for a high mifde- meanor : as happened in the cafe of Roger earl of Rut¬ land, in 43 Eliz. who was concerned in the earl of Effex’s rebellion. Mifprifions are generally divided in¬ to two forts ; negative, which confilf in the conceal¬ ment of fomething which ought to be revealed j and po- fitive, which confift in the commiffion of fomething which ought not to be done. i. Of the firft, or negative kind, is what is called inifprijion of treafon ; confifting in the bare knowledge and concealment of treafon, without any degree of af- fent thereto j for any affent makes the party a princi¬ pal traitor; as indeed the concealment, which was conftrued aiding and abetting, did at the common law; in like manner as the knowledge of a plot againfl the ffate, and not revealing it, w7as a capital crime at Florence, and other ftates of Italy. But it is now en¬ acted by the ftatue I & 2 Ph. & Mar. c. 10. that a bare concealment of treafon {hall be only held a mif¬ prifion. This concealment becomes criminal, if the party apprifed of the treafon does not, as foon as con¬ veniently may be, reveal it to fome judge of aflize or juflice of the peace. But if there be any probable cir- cumftances of affent, as if one goes to a treafonable meeting, knowing beforehand that a confpiracy is in¬ tended againft the king ; or, being in fuch company once by accident, and having heard fuch treafonable confpiracy, meets the fame company again, and hears more of it, but conceals it ; this is an implied affent in law, and makes the concealer guilty of a6tual high treafon. Mifprifion of felony is alfo the concealment of a fe¬ lony which a man knows, but never affented to ; for, if he affented, this makes him either principal or ac- ceffory. And the punifhment of this, in a public of¬ ficer, by the ftatute Weftm. I. 3 Edw. I. c. 9. is im- prifonment for a year and a day ; in a common perfon, imprifonment for a lefs difcretionary time ; and, in both, fine and ranfom at the king’s pleafure : which pleafure of the king muft be obferved, once for all, not to fignify any extrajudicial will of the fovereign, but fuch as is declared by his reprefentatives, the judges in his courts of juftice 5 voluntas regis in curia, non in comer a. 2. Mifprifions, which are merely pofitive, are ge¬ nerally denominated contempt or high mifdemeanours; of which the principal is the mal adminijlration of fuch Vol. XIV. Part I. 289 ] M I .S high officers as are in public truft and employment. This is ufually punifhed by tke method of parliamen¬ tary impeachment; wherein fuch penalties, fhort of death, are inflifted, as to the wifdom of the houfe of peers fhall feem proper ; confifting ufually of banifh- ment, imprifoment, fines, or perpetual difability. Hither alfo may be referred the offence of embczxling the public money, called among the Romans peculatus; which the Julian law punifhed with death in a magiftrate, and with deportation, or banifhment, in a private perfon. With us it is not a capital crime, but fubjedts the com¬ mitter of it to a difcretionary fine and imprifonment.—• Other mifprifions are, in general, fuch contempts of the executive magiftrate as demonftrate themfelves by fome arrogant and undutiful behaviour towards the king and government : for a detail of which, vide Blackftone’s Comment, iv. 22. MISSAL, the Romifh mafs-book, containing the feveral mafles to be faid on particular days. It is de¬ rived from the Latin word tnijfa, wdiich, in the ancient Chriftian church, fignified every part of divine fer- vice. MISSEL-bird, a fpecies of Turdus. See Tur- dus, Ornitholqgy Index. MISSIO, among the Romans, was a full difeharge given to a foldier after 20 years fervice, and differed from the exauRoratio, which was a difeharge from duty after 17 years fervice. Every foldier had a right to claim his mifio at the end of 20 years. MISSION, in Theology, denotes a powrer or com- miflion to preach the gofpel. Jefus Chrift gave his difciples their miffiion in thefe words, Go and teach all nations, &c. The Romanifts reproach the Proteftants, that their minifters have no million, as not being authorized in the exercife of their miniftry, either by an uninter¬ rupted fucceffiion from the apoftles, or by miracles, or by any extraordinary proof of a vocation. Many among us deny any other midion neceffary for the miniftry than the talents neceffary to dil- charge it. Mission is alfo ufed for an eftablifhment of people zealous for the glory of God and the falvation of fouls ; who go and preach the gofpel in remote coun¬ tries and among infidels. There are millions in the Eaft as well as in the Weft Indies. Among the Romanifts, the religious orders of St Dominic, St Francis, St Auguftine, and the Jefuits, have millions in the Levant, America, &c. The Jefuits have alfo miftions in China, and all other parts of the globe where they have been able to penetrate. There have been alfo feveral Prote- ftant miflions for diffufing the light of Chriftianity through the benighted regions of Afia and America. Of this kind has been the Danifh miflion planned by Frederic IV. in 1706. And the liberality of private benefadlors in our own country has been alfo extended to the fupport of miflionaries among the Indians in America, &c. MISSIONARY, an ecclefiaftic who devotes him- felf and his labours to fome miflion, either for the in- ftru£tion of the orthodox, the convi£tion of heretics, or the converfion of infidels. See Jesuits. MISSISSIPPI, a noble river in America, which waters about fivd-eighths of the United States, forming O 0 their Miflal II Mifliffippi MIT [ 290 ] M I T Mlffiflippi their u’eAern boundary, and feparating them from the province of Louiliana and the Indian country. Its i ' ' ; length has not been accurately afcertained, but it is conjedlured to be upwards of 3000 miles. There are numerous tributary ftreams which fall into it from the W. and E.; and the country on both fides of the ri¬ ver, is faid to be equal in goodnefs and fertility to any in North America. It is navigable as far as to what are denominated the falls of St Anthoni/, and fome fay farther". There are fait fprings on each fide of this river, which produce fait of an excellent quality, and large quantities of coal are found on its upper branches. Its mouths alfo form an ifland of confider- able extent. Thefe are fituated between 290 and 30° N. Lat. and between 89® and 90° W. Long. MISSOURI, a river in Louifiana, which falls into the Miflifiippi from the weft, 195 miles above the mouth of the Ohio, and about 1160 miles from the Balize in the gulf of Mexico. The extent of its navi¬ gation is not fufficiently known ; but by the map of Captain Hutchins it appears to be navigable 1300 miles. The progrefs of fettlement by the Spaniards on the fouth and weft, and by the Englilh on the north and eaft, is reported by late travellers to be aftonilhing; and according to the map of Mr M’Kenzie, it appears that there is a communication by water, attended with little difficulty, from the upper lakes to Nootka found, or its vicinity. In a voyage of difcovery undertaken by Captains Lewis and Clarke in 1805, under the aufpices of the American government, it appears that the Miffouri at the diftance of 3848 miles by the courfe of the river from its junction with the Miffiffippi, divides into three branches, to which they gave the names of Jefferfon’s, Madifon’s, and Gallatin’s rivers5 and the firft of thefe, Jefferfon’s river, and the only one explored, is naviga¬ ble for 248 miles. Phil. Mag. xxvii. 13. MISSUS, in the Circenfian games, were the match¬ es in horfe or chariot races. The ufual number of tnijfus or matches in one day was 24 ; though the emperor Domitian prefented the people with too. The laft match w7as generally made at the expence of the people, who made a colledtion for the purpofe •, hence it was called mijfus cerarius, a fubfcription plate. MIST, or Fog. See Fog. MISTAKE, any wwong adlion committed, not through an evil defign, but through an error of judge¬ ment. Mistake, in Law. See Ignorance. MISUSER, in Law, is an abufe of any liberty or benefit •, as “ He (hall make fine for his misuser.” Old. Nat. Br. 149. By mifufer a charter of a corpo¬ ration may be forfeited ^ fo alfo an office, &c. MITCHELSTOWN, a port town of Ireland, in the county of Cork and province of Muniler in Ireland, where there is a college founded by the Earl of King- fton for the fupport of 12 decayed gentlemen and 1 2 decayed gentlewomen, who have 40I. yearly, and hand- fome apartments. MITE, a fmall piece of money mentioned Luke xii. 59. and xxi. 2. In the Greek it is %o$gtty7ns, h e. g//a~ drans, or a quarter of the Roman denarius fo that the mite was wmrth about feven farthings, or two pence of our money. Mite. See Acarus, Entomology Index, MIT EL LA, bastard American sanicle : A Mltella genus of plants belonging to the decandria clafs, and in ^ . the natural method ranking under the 13th order, Sue- eulentce. See Botany Index. —y—. MITHRA, feafts of, in antiquity, were feafts cele¬ brated among the Romans in honour of Mithras or the fun. The moft ancient inftance of this Mithras among the Romans occurs in an infeription dated in the third confulate of Trajan, or about the year of Chrift 101. This is the dedication of an altar to the fun under the above name, thus inferibed, Deo Soli Mithrce. But the worlhip of Mithras was not known in Egypt and Syria in the time of Origen, who died about the year of Chrift 263 ; though it was common at Rome for more than a century before this time. The worffiip of Mi¬ thras was proferibed at Rome in the year 378, by or¬ der of Gracchus, prefect of the praetorium. According to M. Freret, the feafts of Mithras were derived from Chaldea, where they had been inftituted for celebrating the entrance of the fun into the fign Taurus. MITHRAS, or MiTHRA, a god of Perfia and Chal¬ dea, fuppoled to be the fun. His worlhip was intro¬ duced at Rome. He is generally reprefented as a young man, whole head is covered with a turban after the manner of the Perfians. He fupports his knee upon a bull that lies on the ground, and one of whofe horns he holds in one hand, while with the other he plunges a dagger in his neck. MITHRIDATE, an old term, in Pharmacy; an antidote, or compofition, in form of an eleftuary, fup- pofed to ferve either as a remedy or a prefervative a- gainft poilons. It takes its name from the inventor, Mithridates king of Pontus, who is faid to have fo for¬ tified his body again!! poifons with antidotes and prefer- vatives, that when he had a mind to defpatch himfelf, he could not find any poifon that would take effeff. MITHRIDATES, the name of feveral kings of Pontus. See Pontus. Mitiiridates VII. furnamed Kupator and the Great, fucceeded to the throne at the age of 11 years, about 123 years before the Chriftian era. The beginning of his reign was marked by ambition, cruelty, and arti¬ fice. He murdered his own mother, who had been left by his father co-heirefs of the kingdom 3 and he forti¬ fied his conftitution by drinking antidotes again!! the poifon with which his enemies at court attempted to deftroy him. He early inured his body to hardffiip, and employed himfelf in the moft manly exercifes, of¬ ten remaining whole months in the country, and mak¬ ing frozen fnow and the earth the place of his repofe. Naturally ambitious and cruel, he fpared no pains to acquire himfelf power and dominion. He murdered the two fons whom his lifter Laodice had had by Aria- rathes king of Cappadocia, and placed one of his own children, only eight years old, on the vacant throne. Thefe violent proceedings alarmed Nicomedes king of Bi- thynia, who had married Laodice the widow of Ariara- thes. He fuborned a youth to be king of Cappadocia, as the third fon of Ariarathes 3 and Laodice was lent to Rome to impofe upon the fenate, and affure them that her third fon was noxv alive, and that his preten- fions to the kingdom of Cappadocia were juft and w^ell grounded. Mithridates, on his part, fent to Rome Gordius the governor of his fon 3 who folemnly declar¬ ed before the Roman people, that the youth who fat MIT [ 2oi ] Ml T MIthri- on tlie tlirone of Cappadocia was tlie third fon and ^atcs* lawful heir of Ariarathes, and that he was fupported as "J v 1 fuch by Mithridates. This intricate affair difpleafed the Roman fenate ^ and finally to fettle the difpute they took away the kingdom of Cappadocia from Mithri¬ dates, and Paphlagonia from Nicomedes. Thefe two kingdoms being thus feparated from their original pof- feffors, were prefented with their freedom and indepen¬ dence j but the Cappadocians refufed it, and received Ariobarzanes for king. Such were the firft feeds of enmity between Rome and the king of Pontus. Mithri¬ dates never loft an opportunity by which he might lef- fen the influence of his adverfaries j and the more ef¬ fectually to deftroy their power in Afia, he ordered all the Romans that were in his dominions to be maffacred. This was done in one night, and no lefs than 150,000, according to Plutarch, or 80,000 Romans, as Appian mentions, were made the viftims of his cruelty. This called aloud for vengeance. Aquilius, and foon after Sylla, marched againft Mithridates with a large army. The former was made prifoner ; but Sylla obtained a vidlory over the king’s generals; and another decifive engagement rendered him matter of all Greece, Mace¬ donia, Ionia, and Afia Minor. This ill fortune was ag¬ gravated by the lofs of about 200,000 men, who were killed in the feveralengagements that had been fought; and Mithridates, weakened by repeated ill fuccefs by fea and land, fued for peace from the conqueror, which he obtained on condition of defraying the expences which the Romans had incurred by the war, and of remaining fatisfied with the poffeflions which he had re¬ ceived from his anceftors. While thefe negotiations of peace were carried on, Mithridates was not unmindful of his real intereft. His poverty, and not his inclina¬ tions, obliged him to wifti for peace. He immediately took the field with an army of 140,000 infantry, and 16,000 horfe, which confifted of his own forces and thofe of his fon-in-law Tigranes king of Armenia. With fuch a numerous army he foon made himfelf maf- ter of the Roman provinces in Afia ; none dared to op- pofe his conquefts ; and the Romans, relying on his fi¬ delity, had withdrawn the greateft part of their armies from the country. The news of his warlike prepara¬ tions were no fooner heard, than Lucullus the conful marched into Afia ; and without delay he blocked up the camp of Mithridates who was then befieging Cyzi- cus. The Afiatic monarch efcaped from him, and fled into the heart of his kingdom. Lucullus purfued him with the utmoft celerity ; and would have taken him prifoner after a battle, had not the avidity of his fol- diers preferred the plundering of a mule loaded wdth gold to the taking of a monarch who had exercifed inch cruelties againft their countrymen, and Ihowm himfelf fo faithlefs to the moil folemn engagements. After this efcape Mithridates was more careful about the fafety of his perfon ; and he even ordered his wives and lifters to deftroy themfelves, fearful of their falling into the enemy’s hands. The appointment of Gla- brio to the command of the Roman forces, inftead of Lucullus, was favourable to Mithridates, who recover¬ ed the greateft part of his dominions. The fudden arrival of Pompey, however, foon put an end to his vidlories. A battle in the night was fought near the Euphrates, in which the troops of Pontus laboured under every difadvantage. The engagement was by moon-light, and as the moon then fliown in the face Mithri- of the enemy, the lengthened lhadows of the arms of, (iates- the Romans having induced Mithridates to believe that the twro armies were clofe together, the arrow's of his foldiers were darted from a great dilxance, and their efforts rendered ineffedtual. An univerfal overthrow enfued, and Mithridates, bold in his misfortunes, rufli- ed through the thick ranks of the enemy at the head of 800 horfemen, 500 of whom periftied in the at¬ tempt to follow him. He fled to Tigranes ; but that monarch refufed an afylum to his father-in-law, whom he had before fupported with all the colledted forces of his kingdom. Mithridates found a fafe retreat among the Scythians; and though deftitute of powder, friends, and refources, yet he meditated the overthrow of the Roman empire, by penetrating into the heart of Italy by land. Thefe wild projects were rejefled by his fol- kwers, and he fued for peace. It was denied to his ambafl’adors ; and the vidlorious Pompey declared, that, to obtain it, Mithridates mutt alk it in perfon. Pie fcorned to truft himfelf in the hands of his enemy, and refolved to conquer or to die. His fubjedts refufed to follow him any longer ; and revolting from him, made his fon Pharnaces king. The fon fhowed himfelf un¬ grateful to his father ; and even, according to forae w'riters, he ordered him to be put to death. This un¬ natural treatment broke the heart of Mithridates; he obliged his wfife to poifon herfelf, and attempted to do the fame himfelf. It was in vain : the frequent anti¬ dotes he had taken in the early part of his life, ttrength- ened his conftitution againft the poifon ; and when this was unavailing, he attempted to ftab himfelf. The blow was not mortal ; and a Gaul who wTas then pre- fent, at his owm requeft, gave him the fatal ftroke, a- bout 64 years before the Chriftian era. Such w'ere the misfortunes, abilities, and miferable end, of a man, who fupported himfelf fo long againft the power of Rome, and wko, according to the declarations of the Roman authors, proved a more powerful and indefatigable ad- verfary to the capital of Italy than the great Hannibal, Pyrrhus, Perfeus, or Antiochus. Mithridates has been commended for his eminent virtues, and cenfured for his vices. Asa commander he deferves the moft un¬ bounded applaufe ; and it may create admiration to fee him waging w'ar with fuch fuccefs, during fo many years, againft the moft powerful people on earth, led to the field by a Sylla, a Lucullus, and a Pompey. He was the greateft monarch that ever fat on a throne, according to the opinion of Cicero ; and indeed no greater proof of his military chara&er can be brought, than the mention of the great rejoicings which hap¬ pened in the Roman armies and in the capital at the news of his death. No lefs than 12 weeks were ap¬ pointed for public thankfgivings to the immortal gods; and Pompey, who had fent the firft intelligence of his death to Rome, and who had partly haftened his fall, w'as rewarded with the moft uncommon honours. It is faid that Mithidrates conquered 24 nations, whofe different languages he knew, and fpoke with the fame eafe and fluency as his own. As a man of letters he alfo deferves attention. He was acquainted with the Greek language, and even wrote in that dialed! a trea- tiie on botany. His fkill in phyfic is well known ; and even now there is a celebrated antidote which bears his name, and is called miihridale. Superftition as well as O 0 2 nature M 1 T j 2< Mitliiidati- nature had united to render him great j and, if we rely cu‘rn upon the authority of Jultin, his birth was accompanied Mittimus by the appearance of two large comets, which were feen t-—y—w for 70 days fucceffively, and whofe fplendour eclipfed the mid-day fun, and covered the fourth part of the heavens. MITHRIDATICUM bellum, the Mithridatic IVar, one of the longed and molt celebrated wars ever carried on by the Romans againft a foreign power. See Povrus. MITRA, was a cap or covering for the head, worn by the Roman ladies, and fometimes by the men ; but it was looked upon as a mark of effeminacy in the laft, efpecially when it was tied upon their heads. MITRE, a facerdotal ornament worn on the head, by bilhops and certain abbots on folemn occafions j being a fort of cap, pointed and cleft at top. The high prieff among the Jews wore a mitre or bonnet on his head. The inferior priefts of the fame nation had likewife their mitres; but in what relpeft they differ¬ ed from that of the high prieft, is uncertain. Some contend that the ancient bifhops wore mitres; but this is by no means certain. Mitre, in ArchiteElure, is the workmen’s term for an angle that is juft 45 degrees, or half a right one. If the angle be a quarter of a right angle, they call it a half mitre. To defcribe fuch angles, they have an inftrument called the tmtre fqiiare; with this they ftrike mitre lines on their quarters or battens ; and for defpatch, they have a mitre box, as they call it, which is made of two pieces of wood, each about an inch thick, one nailed upright on the edge of the other ; the upper piece hath the mitre lines ftruck upon it on both fides, and a kerf to direft the faw in cutting the mitre joints readily, by only applying the piece into this box. Mitre is ufed by the writers of the Irilh hiftory for a fort of bale money, which was very common there about the year 1270, and for 30 years before and as many after. There were belides the mitre feveral other pieces, called, according to the figures imprefled upon them, rolaries, lionades, eagles, and by the like names. They were imported from France and other countries, and were fo much below the proper currency of the king¬ dom, that they were not worth fo much as a halfpenny each. They were at length decryed in the year 1300, and good coins ftruck in their place. Thefe were the firft Irifh coins in which the feeptre was left out. They were ftruck in the reign of Edward, the fon of our Henry III. and are ftill found among the other anti¬ quities of that country. They have the king’s head in a triangle full faced. The penny, when well pre- ferved, weighs 22 grains; the halfpenny lojj grains. MtfTAU, the capital of the duchy of Courland. It is ftrongly fortified ; but was taken by the Swedes in 1701, and by the Mufcovites in 1706. E. Long. 23. 91. N. Lat. 56. 44. MITTIMUS, as generally ufed, hath two fignifi- cations. 1. It fignifies a writ for removing or tranf- ferring of records from one court to another. 2. It fignifies a precept, or command in wwiting, under the hand and feal of a juftice of the peace, direffed to the gaoler or keeper of fome prifon, for the receiving and 2 ] M O A fafe keeping of an offender, charged with any crime, Mitylene until he be delivered by due courfe of law. n II MITYLENE, or My TELE NIC, in Ancient Georra- plnj, a celebrated, powerful, and affluent city, capital of the iftand of Lefbos. It received its name from Mity/ene, the daughter of Macareus, a king of the country. It is greatly commended by the ancients for the ftatelinefs of its buildings and the fruitfulnefs of its foil, but more particularly for the great men it produced : Pit- tacus, Alcaeus, Sappho, Terpander, Theophanes, Hel- lanicus, &x. were all natives of Mitylene. It was long a feat of learning ; and, with Rhodes and Athens, it had the honour of having educated many of the great men of Rome and Greece. In the Peloponnefian war, the Mitylenians fuffered greatly for their revolt from the power of Athens; and in the Mithridatic wars, they had the boldnefs to refill the Romans, and difdain the treaties which had been made between Mithridates and Sylla. See Metelin. MIXT, or mixt body, in Chemiftry, that which is compounded of different elements or principles. MIXTURE, a compound or affemblage of feveral different bodies in the fame mafs. Chemical mixture is attended with many phenomena which are never obferv- ed in fimple mixtures ; fuch as heat, effervefcence, &c. To chemical mixture belong the union of acids and alkalies, the amalgamation of metals, folution of gums, &c. and upon it depend many of the principal opera¬ tions of Chemistry. See that article,/xt/ESw. Mixture, in Pharmacy, a medicine which differs from a julep in this refpeft, that it receives into its compofition not only falls, extrafts, and other fub- ftances diffoluble in water; but alfo earths, pow'ders, and fuch fubftances as cannot be diffolved. MIZEN, in the fea language, is a particular mail or fail. The mizen mail Hands in the fternmoft part of the fhip. In fome great ftrips there are two of thefe; when that next the main-maft is called the main-mi%en, and that next the poop the bonaventure mi%en. MIZRAIM, or Misraim, the dual name of Egypt, ufed in Scripture to denote the Higher and Lower E- gypt, which fee. It fometimes occurs lingular, Mat&or : 2 Kings xix. Ifaiah xix. Micah vii. MNEMOSYNE, in fabulous hiftory, a daughter of Coelus and Terra. She married Jupiter, by wdiom ihe had the nine Mufes. The word mnemofyne fignifies “ memory and therefore the poets have rightly call¬ ed Memory the mother of the Mufes, becaufe it is to that mental endowment that mankind are indebted for their progrefs in fcience. MNIUM, marshmoss ; a genus of the natural or¬ der of mufei, belonging to the cryptogamia clafs of plants. See Botany Index. MOAB, in Ancient Geography, a country of Arabia Petraea ; fo called from Moab the fon of Lot, to whofe pofterity this country was allotted by divine appoint¬ ment, Deut. xi. 9. It was originally occupied by the Emim, a race of giants extirpated by the Moabites, ibid. Moab anciently lay to the fouth of Ammon, before Sihon the Amorite ftripped both nations of a part of their territory, afterwards occupied by the Ifraelites, Numb. xxi.; and then Moab was bounded by the river Arnon to the north, the Lacus Afphaltites to the weft, the M O C the brook Zared to the fouth, and the mountains Abarim to the eaft. MOAT, or Ditch, in fortification, a deep trench dug round the rampart of a fortified place, to prevent furprifes. The brink of the moat, next the rampart, is called the fcarpe \ and the oppofite one, the counterfearpe. A dry moat round a large place, with a ilrong gar- xifon, is preferable to one full of water j becaufe the paffage may be difputed inch by inch, and the be- fiegers, when lodged in it, are continually expofed to the bombs, grenades, and other fire works, which are thrown inceffantly from the rampart into their works. In the middle of dry moats, there is fometimes another fmall one, called cunette; which is generally dug fo deep till they find water to fill it. The deepeft and broadett moats are accounted the belt *, but a deep one is preferable to a broad one : the ordinary breadth is about 20 fathoms, and the depth about x6. To drain a moat that is full of water, they dig a trench deeper than the level of the water, to let it run off; and then throw hurdles upon the "mud and llime, covering them with earth or bundles of rulhes, to make a fure and firm paffage. MOATAZAL1TES, or Separatists, a religious fefl among the Turks, who deny all forms and quali¬ ties in the Divine Being 5 or who diveft God of his at¬ tributes. There are two opinions among the Turkilh divines concerning God. The firft admits metaphyfical forms or attributes 5 as, that God has wifdom, by which he is wife; power, by which he is powerful 5 eternity, by which he is eternal, &c. The fecond allows God to be wife, powerful, eternal ; but will not allow any form or quality in God, for fear of admitting a mul¬ tiplicity. Thofe who follow this latter opinion are called Moata%alites ; they who follow the former, Se- phalites. The Moatazalites alfo believed that the word of God was created in fubjefto, as the fchoolmen term it, and to confift of letters and found ; copies thereof being written in books to exprefs or imitate the original : they denied abfolute predeflination, and affirmed that man is a free agent. This fe6t is faid to have firft invented the fcholaltic divinity, and is fubdivided into no lefs than 20 inferior feds, which mutually brand one another wfith infidelity. MOBILE, moveable, any thing fufceptible of motion, or that is difpofed to be moved either by it- felf or by fome other prior mobile or mover. Primum Mobile, in the ancient aitronomy, was a ninth heaven or fphere, imagined above thofe of the planets and fixed ftars. This was fuppofed to be the firft mover, and to carry all the lower fpheres round along with it •, by its rapidity communicating to them a motion whereby they revolved in 24 hours. But the diurnal revolution of the planets is now accounted for without the affiftance of any fuch primum mobile, Perpetuum Mobile. See Perpetual Motion. MOCHO, Moco, or Mohha; by fome fuppofed to be the Mufa or Muza of Ptolemy, is a port and town on the Red fea, of confiderable trade 5 contains about 10,000 inhabitants, Jews, Armenians, and Moham¬ medans } and it gives name to a kingdom extending MOD along the mofl fouthern coaft of Arabia ; cf which that Macho part which lies next the fea is a dry barren defert, in Mo''le_ fome places 10 or 12 leagues over j but bounded by ^ mountains, which being well watered, enjoy an al- moft perpetual fpring j and befides coffee, the peculiar produce of this country, yields corn, grapes, myrrh, frankincenfe, caffia, balm, gums of feveral forts, man¬ gos, dates, pomegranates, &c. The weather here is fo hot and fultry in fummer, efpecially when the fouth wind blows, that it would be infupportable, if it was not mitigated by the cool breezes that generally blow from the mountains on the north, or the Red and Arabic feas on the weft and eaff. The heat in winter is equal to that of our warmeft fummers ; and it is very feldom that either clouds or rain are leen. The city of Mocho is now7 the emporium for the trade of all India to the Red fea. The trade was removed hither from Aden, in confequence of the prophecy ot a ffieik, much rever¬ ed by the people, who foretold that it wmuld loon be¬ come a place of extenfive commerce notwithftanding its difadvantageous fituation. 1 he buildings here are lof¬ ty, and tolerably regular, having a pleafant afped from Mecca. The fteeples of feveral mofques are very high, prefenting themfelves to view at a great diffance. Their markets are w’ell ftored with beef, mutton, lamb, kid, camels, and antelopes fieffi, common fowls, Guinea hens, partridges, and pigeons. I he fea affords plenty of filh, but not favoury ; which fome think proceeds from the extreme faltnefs of the water and the nature of their aliment. The markets are alio flocked with fruit, fuch as grapes, peaches, apricots, quinces, and neftarines ; although neither ffirub nor tree is to be feen near the town, except a few date trees. Frequent¬ ly no rain falls here in two or three years, and leldom more than a Ihower or two in a year j but in the mountains, at the diftance of about 20 miles from Mocha, the earth is watered with a gentle fhower every morning, which makes the valleys fertile in corn and the fruits natural to the climate. The Arab inha¬ bitants, though remarkably grave and fuperftitious, are faid to be extremely covetous and hypocritical ; robbing, thieving, and committing piracy, without the leaft fcruple or remorfe. The Englifh and Dutch com¬ panies have handfome houfes here, and carry on a great trade in coffee, olibanum, myrrh, aloes, liquid ftorax, white and yellow arfenic, gum arabic, mum¬ my, balm of Gilead, and other drugs. One inconve¬ nience, however, they fuftain from the violence and exaftions of the Arabian princes 5 but the king’s cu* floms are eafy, being fixed at three per cent, to Euro¬ peans. Of the coins at Mocha, the mod current is the camaffie, which rifes and falls in value at the bank¬ er’s diferetion : they are from 50 to 80 for a current dollar, which is but an imaginary fpecies, being always reckoned one and a half per cent, lower than Spanilh dollars. MOCKING Bird. See Turdus, Orkitiiologt Index. MOCOCO. See Lemur, Mammalia Index. MODE, which is a word of the lame general im¬ port with manner, is ufed as a technical term in gram¬ mar, metaphyfics, and mufic. For its import in Gram¬ mar, fee that article, N° 80. Mode, in Metaphysics, feems properly to denote the manner of a thing’s exiftence : but Locke, whofe. language c [ 293 3 r MOD [ 294 ] MOD Mode, language In that fcience is generally adopted, ufes the ■ a/iodel- word in a fenfe fomewhat different from its ordinary and proper fignification. “ Such complex ideas, which, however compounded, contain not in them the fuppo- lition of fubfifting by themfelves, but are confidered as dependencies on, or affedtions of, fubftances,” he calls modes. Of thefe modes, there are, according to him, two forts, which deferve diftin£t confideration. Firft, There are fome “ which are only variations, or differ¬ ent combinations of the fame fimple idea, without the mixture of any other, as a do%en or a /core ; which are nothing but the ideas of fo many dilfindl units added together and thefe he calls Jlmple modes. Secondly, “ There are others compounded of fimple ideas of fe- veral kinds put together to make one complex one $ v. g. beauty, confifting of a certain compofition of co¬ lour and figure, caufing delight in the beholder; theft, which being the concealed change of the pofleftion of any thing without the confent of the proprietor, con¬ tains, as is vifible, a combination of feveral ideas of fe- veral kinds $” and thefe he calls mixed modes. For the juft diftindlion between ideas and notions, as well as between ideas and the qualities of external objedls, which in this account of modes are all confounded to¬ gether, fee Metaphysics. Mode, in Mujic, a regular difpofition of the air and accompaniments, relative to certain principal founds upon which a piece of mufic is formed, and which are called the effential founds of the mode. Our modes are not, like thofe of the ancients, cha- ra&erized by any fentiment which they tend to excite, but refult from our fyftem of harmony alone. The lounds eflential to the mode are in number three, and form together one perfeft chord. 1. The tonic or key, which is the fundamental note both of the tone and of the mode. 2. The dominant, which is a fifth from the tonic. 3. The mediant, which properly conftitutes the mode, and which is a third from the fame tonic. As this third may be of two kinds, there are of confe- quence two different modes. When the mediant forms a greater third with the tonic, the mode is major j when the third is leffer, it is minor. See Music. MODEL, in a general fenfe, an original pattern, ^ propofed for any one to copy or imitate. Different U This word is particularly ufed, in building, for an kinds ot artificial pattern made in wood, ftone, plafter, or other models. matter, with all its parts and proportions, in order for the better conducing and executing fome great work, and to give an idea of the effedt it will have in large. In all great buildings, it is much the fureft way to make a model in relievo, and not to truft to a bare defign or draught. There are alfo models for the building of Ihips, See. and for extraordinary ftaircafes, &c. They alfo ufe modes in painting and fculpture; whence, in the academies, they give the term model to a naked man or women, difpofed in feveral poftures, to afford an opportunity to the fcholars to defign them in 2 various views and attitudes. General Models in imitation of any natural or artificial fub- method of ftance, are moft ufually made by means of moulds -making compofed of plafter of Paris. For the purpofe of models. making thefe moulds, this kind of plafter is much more fit than any other fubftance, on account of the power it has of abforbing water, and focn condenfing 4 into a hard fubftance, even after it has been rendered Model, fo thin as to be of the confiftence of cream. This happens in a ftiorter or longer time as the plafter is of a better or worfe quality j and its good or bad pro¬ perties depend very much upon its age, to which, therefore, particular regard ought to be had. It is fold in the {hops at very different prices 5 the fineft be¬ ing made ufe of for cafts, and the middling fort for moulds. It may be very eafily coloured by means of almoft any kind of powder excepting what contains an alkaline fijlt j for this would chemically decompofe the fubftance of it, and render it unfit for ufe. A very confiderable quantity of chalk would alfo render it foft and ufelefs, but lime hardens it to a great degree. The addition of common fize will like wife render it much harder than if mere water is made ufe of. In making either moulds or models, however, we muft; be careful not to make the mixture too thick at firft j for if this is done, and more wTater added to thin it, the compofition muft always prove brittle and of a bad quality. The particular manner of making models (or cajls, as they are alfo called) depends on the form of the fubjedl to be taken. The procefs is eafy, where the parts are elevated only in a flight degree, or where they form only a right or obtufe angle with the prin¬ cipal furface from which they projeft ; but where the parts projeft in fmaller angles, or form curves inclined towards the principal furface, the work is more diffi¬ cult. This obfervation, however, holds good only with regard to hard and inflexible bodies 5 for fuch as are foft may often be freed from the mould, even though they have the ftiape laft mentioned. But though this be the cafe with the foft original fubftance, it is not ft) with the inflexible model when once it is caft. The moulds are to be made of various degrees of thicknefs, according to the fize of the model to be caft j and may be from half an inch to an inch, or, if very large, an inch and a half. Where a number of models are to be taken from one mould, it will like- wife be neceffary to have it of a ftronger contexture than where only a few are required, for very obvious reafons. ^ It is much more eafy to make a mould for any foft Anatomical fubftance than a rigid one, as in any of the vifeera of models, the animal body } for the fluidity of the mixture makes it eafily accommodate itfelf to the projedling parts of the fubftance j and as it is neceffary to inflate thefe fubftances, they may be very readily extra&ed again by letting out the air which diftended them. When a model is to be taken, the furface of the original is firft to be greafed, in order to prevent the plafter from flicking to it j but if the fubftance itfelf is flippery, as is the cafe with the internal parts of the human body, this need not be done : when neceffary, it may be laid over with linfeed oil by means of a painter’s brulh. The original is then to be laid on a ^na_ fmooth table, previoufly greafed or covered with AtomicalIn- cloth, to prevent the plafter flicking to it; then {wx-Jlru&or. round the original with a frame or ridge of glaziers putty, at fuch a dirtance from it as will admit the plafter to reft upon the table on all fides of the fubjedl for about an inch, or as much as is fufficient to give the proper degree of ftrength to the mould. A fuffi¬ cient M O D [ 295 ] MOD Model, cient quantity of plafter is then to be poured as uni- —y-™— formly as poffible over the whole fubftance, until it be everywhere covered to fuch a thicknefs as to give a proper fubftance to the mould, which may vary in proportion to the fize. The whole mult then be fuf- fered to remain in this condition till the plafter has attained its hardnefs ; when the frame is taken away, the mould may be inverted, and the fubjedt removed from it; and w'hen the plafter is thoroughly dry let it be well feafoned. Having formed and feafoned the moulds, they muft next be prepared for the cafts by greafing the infide of them with a mixture of olive oil and lard in equal parts, and then filled with fine fluid plafter, and the plane of the mould formed by its refting on the furface of the table covered to a fufficient thicknefs with coarfe plafter, to form a ftrong bafis or fupport for the call where this fupport is requifite, as is particularly the cafe where the thin and membranous parts of the body are to be reprefented. After the plafter is pour¬ ed into the mould, it muft be fuffered to ftand until it has acquired the greateft degree of hardnefs it will receive •, after which the mould muft be removed : but this will be attended with feme difficulty when the fhape of the fubjedf is unfavourable ; and in fome cafes the mould iriuft be feparated by means of a fmall mallet and chiflel. If by thefe inftruments any parts of the model ftiould be broken off, they may be cemented by making the twro furfaces to be applied to each other quite Wet ; then interpofing betwixt them a little li¬ quid plafter 5 and laftly, the joint fmoothed after being thoroughly dry. Any fmall holes that may be made in the mould can be filled up with liquid plafter, after the fides of them have been thoroughly wetted, and fmoothed over with the edge of a knife. In many cafes it is altogether impradticable to pre¬ pare a mould of one piece for a whole fubjedt} and therefore it muft: be confidered how this can be done in fuch a manner as to divide the mould into the fewreft pieces. This may be effedfed by making every piece cover as much of the pattern as poffible, without fur¬ rounding (uch projedting parts, or running into fuch hollow's as would not admit a feparation of the mould. It is impoffible, however, to give any particular direc¬ tions in this matter which can hold good in every in- ftance, the number of pieces of which the mould is to confift being always determined from the ffiape of the pattern. Thus the mould of the human calculus will require no more than three pieces, but that of an os femoris could fcarce have fewrer than ten or twelve.— Where any internal pieces are required, they are firft to be made, and then the outer pieces after the former have become hard. To make a mould upon a hard and dry fubftance, we muft, in the firft place, rub the furface of it fmoothly over wdth the mixture of oil and lard above mentioned. Such hollows as require internal pieces are then to be filled up with fluid plafter •, and while it continues in this ftate, a wire loop muft be intro¬ duced into it, by which, when hardened, it can be pulled off. The plafter fhould be fomewhat raifed in a pyramidal form around this wire, and afterwards cut fmooth with a knife while yet in its foft ftate 5 preferving tw’O or three angular ridges from the loop to the outer edge, that it may fix the more fteadily in the outer piece of the mould to be afterwards made upon it. Let the outer piece then be well greafed, to prevent the fecond piece from adhering \ the loop being enclofed with fome glaziers putty, both to pre¬ vent the fecond piece from adhering and to preferve a hollow place for the cord. To form the fecond or outfide piece, mix a quan¬ tity of plafter proportioned to the extent of furface it is to cover and the intended thicknefs of the mould : when it is juft beginning to thicken, or af- fumes fuch a confiftence as not to run off very eafily, fpread it over the internal piece or pieces as well as the pattern, taking care at the fame time not to go too far left it fhould not deliver fafely 5 and as the plafter becomes more tenacious, add more upon the pattern until it has become fufficiently thick, keeping the edges fquare and fmooth like the edge of a board. The plafter ffiould be fpread equally upon all parts, which is beft done by a painter’s pallet knife or a- pothecary’s bolus knife: but for this the inftrument Ihould be fomewhat lefs pliable than it is commonly made. When the outfide piece is hardened, the edges are to be pared fmooth, and nearly made fquare with a {mall pointed knife. Little holes of a conical ffiape are to be made with the point of a knife about an inch diftant from one another, according to the fize of the piece. Thefe are defigned to receive the fluid pla¬ fter in forming the adjacent parts of the mould, and occafion points correfponding to the hollow's •, and are intended to preferve the edges of the different pieces fteadily in their proper relative fituations. The third piece is then to be formed in a manner fimilar to the fecond ; greafing the edges of the former plentifully with hog’s lard and oil, to prevent the pieces from ad¬ hering to each other. Thus the pattern is to be wholly enclofed, only leaving a proper orifice for pouring in the plafter to form the model 5 fmall holes being alfo bored in the mould oppofite to the wire- loops fixed in the infide pieces, through which a cord is to be conveyed from the loop to confine fuch pieces during the time of calling. In fome cafes, however, it is not neceflary that the mould Ihould totally en- clofe the pattern 5 for inftance, where a model is to be made of a pedcftal, or a bull of any part of the hu¬ man body. The bottom of fuch moulds being left open, there is accordingly ample room for pouring in the plafter. After the mould is completely formed, it is next to be dried either naturally or by a gentle artificial heat, and then feafoned in the following manner :—>- Having been made thoroughly dry, which, if the mould is large, will require tw'O or three weeks, it is to be bruffied over plentifully with linfeed oil boiled with fugar of lead, finely levigated litharge, or oil of vitriol. The infide and joints of the mould fhould be particularly well fupplied with it. If the mould be large, it is needlefs to attend to the outfide j but when the moulds are fmall, it will not be improper to boil them in the oil 5 by which means their pores are more exactly filled than could otherwife be done. After the moulds have undergone this operation, they are again fet by to dry, when, being greafed with olive oil and hog’s lard, they are fit for ufe. If linieed oil be ufed for greafing the moulds, it will in a ffiort time impart a difagreeable yellowr colour to the cafts. The Model. MOD [ 296 ] M O D Model. Xlie mould being properly prepared and feafoned, "nothing more is requiiite to form the model than to pour the hneft liquid plafler of Paris into it. After a layer of this, about half an inch in thicknefs, has been •fo rmed all round the mould, we may ufe the coarfer kind to fill it up entirely, or to give to the model 4 what thicknefs we pleafe. Models Befides the models which are taken from inanimate from living bodies, it has been frequently attempted to take the -fubjedts. exadt refemblance of people while living, by ufing their face as the original of a model, fiom whence to take a mould ; and the operation, however difagree- able, has been fubmitted to by perfons of the higheft ranks in life. A confiderable difficulty occurs in this, however, by reafon of the perfon’s being apt to (brink and dillort his features when the liquid is poured up¬ on him ) neither is he altogether without danger of fuffocation, unlefs the operator well underltands his bufi- nefs. To avoid tbe former inconvenience, it wfill be pro¬ per to mix tbe plafier with warm inflead of cold wa¬ ter, by which means the perfon will be under no temp¬ tation to (brink 5 and to prevent any danger of a fa¬ tal accident, tbe following methoel is to be pra&ifed : Having laid the perfon horizontally on his back, tbe head mud firft be raifed by means of a pillow to the exact pofition in which it is naturally carried when the body is ere£t 5 then tbe parts to be reprefented nauft be very thinly covered over with fine oil of al¬ monds by means of a painter’s bruffi 5 tbe face is then to be firft covered with fine fluid plafter, beginning at the upper part of the forehead, and fpreading it over tbe eyes, wffiich are to be kept clofe, that tbe plafter may not come in contact with tbe globe ; yet not clofed fo ftrongly as to caufe any unnatural ’wrinkles. Cover then the nofe and ears, plugging firft up the meatus auditor^ with cotton, and the noftrils with a frnall quantity of tow rolled up, of a proper fize, to exclude the plafter. During tbe time that the ncife is thus Hopped, tbe perfon is to breathe through the mouth : in this date the fluid plafter is to be brought down low enough to cover the upper lip, obferving to leave the rolls of tow projedfting out of tbe plafter. When the operation is thus far carried on, the plafter muft be buf¬ fered to harden ; after wffiich the tow may be with¬ drawn, and tbe noftrils left free and open for breathing. The mouth is then to be clofed in its natural pofition, and the plafter brought down to the extremity of the chin. Begin then to cover that part of the bread which is to be reprefented, and fpread tbe plafter to the outfides of the arms and upwards, in fuch a manner as to meet and join that which is previoufly laid on the face : when the whole of tbe mafs has acquired its due hardnefs, it is to be cautioufly lifted, without breaking, or giving pain to the perfon. After tbe mould is conftrufted, it muft/- which he gave to his brother Hulaku or Hulagfl, to tK-na, 3S. tend his dominions weftward. In 1255 he entered Iran, where he fuppreffed the Ifmaelians or Affaffins, of whom an account is given under the article Assas¬ sins, and two years afterwards he advanced to Bagdad, which he took, and cruelly put the caliph to death, treating the city with n@ more lenity than the Moguls ^3 , ufually treated thofe which fell into their hands. Eve-®^^ ry thing was put to fire and fword $ and in the city and its neighbourhood the number of fiain, it is faid, a- mounted to i,6oo,oco. The next year he invaded Sy¬ ria ; the city of Damafcus w’as delivered up, and, as it made no refiftance, the inhabitants were fpared j but Aleppo being taken by ftorm, a greater {laughter en- fued there than had taken place at Bagdad, not even- the children in their cradles being fpared. Some cities of this country revolted the next year, or the year af¬ ter •, but falling again into the hands of the Moguls, they were plundered, and the inhabitants butchered- without mercy, or carried into fiavery. Hulaku died in 1264, and at his death we may fix the greateft extent of the Mogul empire. It now com¬ prehended the whole of the continent of Alia, except¬ ing part of Indoftan, Siam, Pegu, Cochin China, and a few of the countries of Lefter Alia, which had not been attacked by them ; and during all thefe vaft con¬ quefts no Mogul army had ever been conquered, ex cept one by Jaloloddin, as mentioned under the article Gazna.—From this period, however, the empire be-it beghis to gan to decline. The ambition of the khans having(ie(;ijne. prompted them to invade the kingdoms of Japan and Cochin China, they were miferably difappointed in their ■ attempts, and loft a great number of men. The fame bad fuccefs attended them in Indoftan •, and in a Ihort time this mighty empire broke into feveral fmaller ones. The governors of Perfia being of the family of Jenghiz Khan, owned no allegiance to any fuperior ; thole of Tartary did the fame. The Chinefe threw oft the yoke ; and thus the continent of Afia wore much the lame face that it had done before Jenghiz Khan began hi$ conquefts. The i M O G [ 302 ] Mogms. 7he fuccefiors of Hulaku reigned in Perfia till the a wall 16 Becomes a great con¬ queror. year 1335 j but that year Abufaid Khan, the eighth from Hulaku, dying, the affairs of that country fell into confufion for want of a prince of the race of Jenghiz Khan to fucceed to the throne. The empire, therefore, was divided among a great number of petty princes who fought againfl each other almoft without intermiffion, till in the year 1369 Timur Bek, or Ta- . *3 ^ merlane, one of thefe princes, having conquered a num- 'crowued" ber others, was crowned at Balkh, with the porn- emperor of P0lls title of Saheb Karan ; that is, “ the emperor of i5alkh. the age, and the conqueror of the world.” As he had juft before taken that city, and deftroyed one of his moft formidable rivals who had (hut himfelf up in it, the new emperor began his reign with beheading fome of the inhabitants, impriloning others, burning their houfes, and felling the women and children for Haves. In 137° he crofted the Sihun, made war on the Getes, and attacked Karazm. Next year he granted a peace to his enemies 5 but two years after, he again invaded the country of the Getes, and by the year 1379 ha'd fully conquered that country as well as Korazan ; and from that time he continued to extend his conquefts in much the fame manner as Jenghiz Khan had done, though with lefs cruelty.—In 1387 he had reduced Ar¬ menia, Georgia, and all Perfia j the conqueft of which laft was completed by the redu£lion of Ifpahan, 70,000 of the inhabitants of which were flaughtered on ac¬ count of a fedition raifed by fome ralh or evil difpofed perfons. After the redu£lion of Perfia, Timur turned his arms northward and weft ward, fubduing all the coun¬ tries to the Euphrates. He took the city of Bagdad ; , fubdued Syria; and having ravaged great part of Ruf- Invades andfia, returned to Perfia in 1396, where he fplendidly Jndoftan ^ea^e<^ ^Eole army. In ] 398 he invaded Indof- tan, crofted the Indus on the 17th of September, redu¬ ced feveral fortreffes, and made a vaft number of cap¬ tives. However, as he was afraid that, in cafe of any emergency, thefe prifoners might take part udth the enemy, he gave orders to his foldiers to put all their In¬ dian flaves to death 5 and in confequence of this inhu- jnan order, more than 100,000 of thefe poor wTretches were flaughtered in lefs than an hour. In the beginning of the year 1399 Timur was met by the Indian army ; whom after a defperate battle, he defeated with great daughter, and foon after took the city of Delhi the capital of the country. Here he feat- ed himfelf on the throne of the Indian emperors, and here the fnarifs, kadis, and principal inhabitants of the city, came to maKe their fubmiflion, and begged for mercy. The tame elephants and rhinocerofes likewife Mere brought to kneel before him as they had been ac- cuhomed to do to the Indian emperors, and made a great cry as if they implored his clemency. Thefe war elephants, 120 in number, were, at his return, fent to Samarcand, and to the province where his fons refided. Aftei this, at the requeft of the lords of the court, Ti¬ mur made a great feaft ; at which he diftributed pre- )3 tents to the princes and principal officers. ShiT <■ ** AhiA •,lmc ,COI,Mcd of «“« cities, called itroyed, ‘^7/r9 Old. Delhi, and Je/uin Pencil. Seyri was fur- andthein- r°tinded with a wall in form of a circle. Old Delhi habitants was the fame, but much larger, lying fouth-weft of the daughter- other. Thefe two parts were joined^ on each fide by M O G and the third, lying between them, was called Moguls. Jehan Penah, which was larger than Old Delhi. Pe- nah had ten gates j Seyri had feven, three of which looked towards Jehan Penah j this laft had 13 gates, fix to the north-'weft, and feven to the fouth-eaft. Eve¬ ry thing feemed to be in a quiet pofture ; when, on the 12th of January 1399, the foldiers of Timur being af- fembled at one of the gates of Delhi, infulted the inha¬ bitants of the fuburbs. The great emirs were ordered to put a flop to thefe diforders j but their endeavours wrere not effedlual. The foltanas having a curiofity to fee the rarities of Delhi, and particularly a famous "pa¬ lace adorned with loco pillars, built by an ancient king of India, went in with all the court j and the gate being on that occafion left open for every body, above rjjOOo foldiers got in unperceived. But there was a far greater number of troops in a large place between Delhi, Seyri, and Jehan Penah, who committed great diforders in the two laft cities. This made the inhabi¬ tants in defpair fall on them j and many, fetting fire to their houles, burnt their wives and children. The fol¬ diers feeing this confufion, did nothing but pillage the houfes; while the diforder was increafed by the admif- fion of more troops, who feized the inhabitants of the neighbouring places who had fled thither for fhelter. i he emirs, to put a flop to this mbchief, caufed the gates to be ffiut: but they were quickly opened by the foldiers within, who rofe in arms againft their officers 5 fo that by the morning of the 13th the whole army was entered, and this great city was totally deftroyed. Some foldiers carried out 150 flaves, men, women, and chil¬ dren 5 nay, fome of their boys had 20 flaves a piece to their (hare. The other fpoils, in jewels, plate, and ma- nufa&ures, were immenfe; for the Indian women and girls were adorned with precious ftones, and had brace¬ lets and rings on their hands, feet, and even toes, fo that the foldiers were loaded with them. On the 1 5th, in Old Delhi, the Indians retired into the great mofque, to defend themfelves; but being attacked by the Tar- tats, they wrere all flaughtered, and towers erected with their heads. A dreadful carnage now enfued through¬ out the whole city, and feveral days were employed be¬ fore the inhabitants could be made to quit it entirelv • and as they went, the emirs took a number of them for their fervige. The artifans were alfo diftributed among the princes and commanders; all but the mafons, who were referved for the emperor, in order to build him a fpacious ftone mofque at Samarcand. After this terrible clevaftation, Timur marched into the difterent provinces of Indoftan, everywhere defeat¬ ing the Indians who oppofed him, and flaughtering the Ghebrs or worffiippers of fire. On the 23th of March lie fet out on his return, and on the 9th of May ar¬ rived at Samarcand. In a few months after his arrival, he was obliged to undertake an expedition into Perfia, where affairs were in the utmoft diforder on account of the mifcondudl of his fon, whom he had appointed fo- vereign of that empire. Here Timur foon fettled mat¬ ters ; after which he again fet out on an expedition weft ward, reduced many places in Georgia which had not fubmitted before, and invaded and conquered Sy- ria. At the fame time he quarrelled with Bajazet the iirnur Turkifti fultan, then bufied in an enterprife againftKbL Conftantinople, in which he would probably have fuc-zet the^' ceeded had not Timur interpofed. The caufe of thisTurkifll quarrelfultatl- M O G [ 30 Moguls, quarrel at firft was, that Bajazet had demanded tribute r > £rom a prjnce WJ}0 v^s under Timur’s protedion, and is faid to have returned an infulting anfwer to the Tar¬ tar ambafiadors who were fent to him on that account. Timur, however, who was an enthufiaft in the caufe of Mahometanifm, and confidered Bajazet as engaged, in the caufe of heaven when befieging a Chriftian city, was very unwilling to difturb him in fo pious a work j and therefore undertook feveral expeditions againft the princes of Syria and Georgia, in order to give the Turkifh monarch time to cool and return to reafon. Among other places, he again invefled the city of Bag¬ dad, w-hich had call; off its allegiance to him ; and hav¬ ing taken it by Itorm, made fuch a dreadful maffacre of the inhabitants, that 1 20 towrnrs were ere&ed with the heads of the (lain. In the mean time Bajazet conti¬ nued to give frelh provocation, by protecting one Kara Yufef a robber, who had even infulted the caravan of Mecca 5 fo that Timur at length refolved to make war upon him. The fultan, however, forefeeing the dan¬ ger of bringing fuch a formidable enemy againfl: him- felf, thought proper to afk pardon, by a letter, for what was paft, and promife obedience to limur’s wall for the future. This embaffy was gracioufly received •, and Ti¬ mur returned for anfwer, that he would forbear hoftili- ties, provided Bajazet would either put Kara Yufef to death, fend him to the Tartar camp, or expel him out of hjs dominions. Along with the lurkilh ambafiadors he fcnt one of his own 5 telling Bajozet that he would march into the confines of Anatolia, and there W’ait his final anfwer. 20 BEjazet de¬ feated and taken pri- Ipner. Death of Tamerlane and diffohi' tion of his empire. Though Bajazet had fecmed at firfi: willing to come to an agreement with Timur, and to dread his fuperior power ) yet he nowr behaved in firch an unfatisfaftory manner, that the Tartar monarch defired him to pre¬ pare for war } upon which he raifed the fiege of Con- ftantinople, and having met Timur with an army great¬ ly inferior to the Tartars, was utterly defeated and ta¬ ken prifoner. According to fome accounts, he was treated with great humanity and honour •, while others inform us, that he was (hut up in an iron cage, againfl: which he dalhed out his brains the following year. At any rate, it is certain that he was not reftored to liberty, but 'died in confinement. This viClory was followed by the fubmiflion of many places of the Lefler Afia to Timur; the Greek empe¬ ror owned himfelf his tributary, as did alfo the fultan of Egypt. After this Timur once more returned to Georgia, which he cruelly ravaged •, after which he marched to Samarcand, where he arrived in the year 1-405. Here, being now an old man, this mighty con¬ queror began to look forward to that ftate which at one time or other is the dread of all living creatures ; and Timur, in order to quiet the remorfes of his own con- fcience, came to the following curious refolution, which he communicated to his intimate friends 5 namely, that “ as the vafl: conquefts he had made were not obtained without fome violence, which had occafioned the de- ftruftion of a great number of God’s creatures, he was refolved, by way of atonement for his paft crimes, to perform fome good action j namely, to maKe war on ’ the infidels, and exterminate the idolaters of China.” This atonement, however, he did not live to accom- plilh ; for he died the fame year of a burning ftver, in the ^ift year of his age and 36th of his reign. 3 1 M O H On the death of Timty, his empire fell immediately into great diforder, and the civil wars continued for five or fix years; but at laft peace was reftored, by the v fettlement of Shah Rukh, Timur’s fon, on the throne. He did not, however, enjoy the empire in its full ex¬ tent, or indeed much above one half of it ) having only Karazm, Khoraffan, Kandahar, Perfia, and part of Hindoftan. Neither was he able, though a brave and warlike prince, to extend his dominions, though he tranfmitted them to his fon Uhig Beg. He proved a wife and learned monarch *, and is famous for the aftro- nomical tables which he caufed to be eompofed, and which are well known at this day. He was killed in 1448 by his fon Abdollatif, who fix months after was put to death by his own foldiers. Aiter the death ot Abdollatif, Abdollah, a grandfon of Shah Rukh, fei- zed the throne ; but, after reigning one year, was ex¬ pelled by Abuiaid Mirza, the grandfon of Miran Shah the fon of Timur. His reign was one continued feene of wars and tumults ; till at laft he was defeated and ta¬ ken prifoner by one Haflan Beg, who put him to death in 1468. From this time we may look upon the em¬ pire of Timur as entirely diflblved, though his descend¬ ants ftill reigned in Perfia and Indoftaa, the latter of which is ftill known by the name of the Mogul's em- Moguls n Mohilof. pire. _ 22* On the death of the above mentioned monarch, his of fon Babr or Babor fucceeded him, but was foon drivenHnr out by the Ufbeck Tartars j after which he refided fome time in Gazna, whence he made incurfions into Hindo¬ ftan, and at length became mafter of the whole empire, excepting the kingdoms of Dekan, Guzerat, and Ben¬ gal.—For the tranfaftions fubfequent to this period, fee Hindostan and India. MOHAIR, in commerce, the hair of a kind of goat frequent about Angora in Turkey j the inhabitants of which city are all employed in the mamifafture of cam- blets made of this hair. Some give the name mohair to the camblets or fluffs made of this hair : of thefe there are two kinds \ the one fmooth and plain, the other watered like tabbies : the difference between the two only confifts in this, that the latter is callendered, the other not. There are alfo mohairs both plain and watered, whofe woof is of wool, cottoa, or thread. Mohair Shell, in Conchology, a name given to a fpecies of voluta, which feems of a clofely and finely reticulated texture, and refembles on the furface a piece of mohair or a very clofe filkworm’s web. MOHAWKS. See Muck. Mqhavpk Country, a part of North America, inha¬ bited by one of the five nations of the Iroquois, fituated between the province of New York, and the lake On¬ tario or Frontignac. MOHILA, .or Moelia, one of the Comora iflands in the Indian fea, between the north end of Madagafcar and the continent of Africa. The inland parts are mountainous and woody ; but the lands adjoining to the fea are watered by feveral fine ftreams. The ifland abounds with provifions of all kinds ; and the Eaft In¬ dia fhips of different nations fometimes touch here for refrerhment. MOHILOF, a large and ftrong city of Poland, in the province of Lithuania, and palatinate of Mfciflau. It is well built, populous*.and has a confiderable trade. Nearv- M O I Near this place the Swedes obtained a great victory over the Ruffians in 1707. MOIDORE, a Portuguefe gold coin, value il. 7s. fterling. P.iOIErit (Medietas'), the half of any thing. I\iOLv A, a town of Ireland, in the county of Down and province of Lifter, 69 miles from Dublin 5 noted for its linen manufacture. It gives title of earl to the family of Rawdon. MOISTURE. See Humidity. ■1 he moifture of the a:r has conliderable effects on the human body. For the quantity and quality of the food, and the proportion of the meat to the drink, be- ing given, the weight,of a human body is lefs, and con- fequently its difcbarges greater in dry weather than in wet weather ; which may be thus accounted for: the moifture of the air moiftens the fibres of the fkin and leffens perfpiration by leffening their vibratory motion. When perfpiration is thus leffened by the moifture of tire air, urine indeed is by degrees increafed, but not equally. Hence, according to Dr Eryan Robinfon, we learn, that to keep a body of the fame weight in wet weather as in dry, either the quantity of food .muft b£ leffened, or the proportion of the meat to the drink increafed : and both thefe may be done by lef- fening the drink without making any change in the meat. The inftrument ured for determining the degree of moifture in the air, is called an hygrometer. See Hy¬ grometer. MOIVRE, Abraham, a learned mathematician, was born at Vitri in Champagne, in France, 1667, v\heie his father wTas a furgeon. At the revocation of the edict of Nantes, he came to England. Before he left France, he had begun the ftudy of mathema¬ tics ; and having perfected himfelf in that fcience in London, he was obliged, byneceffity, to teach it. New¬ ton’s Principle, which accidentally fell into his hands, ffiowed him how little progrefs he had made in a fcience’ of which he thought himfelf mafter. From this w’ork he acquired a knowledge of the geometry of infinites with as great facility as he had learned the elementary geometry 5 and in a fhort time he was fit to be ranked with the moft celebrated mathematicians. His fuccefs in thefe ftudies procured him a feat in the Royal Society of London and in the Academy of Sciences at Paris. His merit was fo w’ell underftood in the former, that he was thought capable of deciding in the famous difpute between Leibnitz and Newton concerning the differen¬ tial calculus.—He publifhed a Treatife on Chances in I73*> and another on Annuities in 17525 both ex¬ tremely accurate, "I he Philofophical Tranfaflions con¬ tain many interefting memoirs of his compofition.— Some of them treat of the method of fluxions 5 others are on the lunula of Hippocrates 5 others on phyfical aftronomy, in which he refolved many important pro¬ blems j and others, in fhort, on the analyfis of the games of chance, in which he followed a different coune from that of Montmort. Towards the clofe of Ins life he loft his fight and hearing 5 and the demand for fleep became fo great that he required 20 hours of it in a day. He died at London, 1754, aged 87. His knowledge was not confined to mathematics ; but he retained to the laft a tafte for polite literature. He Vi as intimately acquainted wuth the belt authors of anti- 3 r 304 ] MOL quity 5 and he was frequently confulted about difficult paffages in their works. Rabelais and Moliere were his favourite French authors: he had them by heart 5 and he one day obferved to one of his acquaintance, “ that he would rather have been Moliere than New¬ ton.” He recited whole feenes of the Mifanthrope with that delicacy and force with which he remembered to have lieard them recited at Paris 70 years before, by Moliere’s own company. The charatfter indeed ’was fomewffiat fimilar to his own. He judged feverely of mankind 5 and could never conceal bis difgull at" the converfation of a fool, or his averfion to cunnincr and diffimulation. He was free from the affeflation of fci¬ ence, and no one could know him to be a mathemati¬ cian but from the accuracy of his thoughts. His con¬ verfation was general and inftruftive. Whatever he faffi was W'ell digefted and clearly expreffed. His ftyle poffeffed more ftrength and folicity than ornament and animation 5 ^but he was always corrett, and he bellowed as much pains on his icntences as on his calculations. * could never endure any bold affertions or indecent witticifms againft religion. Mola, an ancient town of Italy, in the kingdom of Naples, and in the Terra di Lavoro, where they .pre¬ tend to Ihow the ruins of Cicero’s houfe. It is feated on the gulf of Venice, in E. Long. 17.50. N. Lat 41, 5- Mola Salfa ((Salt Cahe), in antiquity, was barley parched, and afterwards ground to meal or flour, then mixed with fait and frankincenie, with the addition of a little water. Thus prepared, it was fprinkled be¬ tween the horns of the vi&im before it was killed in fa- enfice. This aft was called immolatio, and was com¬ mon to the Greeks as well as Romans; with this dif¬ ference, that the mola of the Romans was of wheat. The Greeks called it sAn or MGLARES, or Dentes molares, in Anatomy, the large teeth, called in Engliffi the grinders. See Anatomy Index. MOLASSES, or Molosses. See Molosses. MOLDAVIA, a province of Turkey in Europe, bounded on the north-eaft by the river Niefter, which divides it from Poland 5 .on the eaft, by Beflarabia 5 on the fouth by the Danube, which parts it from Bulga¬ ria 5 and on the weft, by Walachia and Tranfylvania. It is 240 miles in length and 150 in breadth. It lies in a good air and fruitful foil, producing corn, wine, rich paftures, a good breed of horfes, oxen, ffieep, plenty of game,^ fiffi, fowl, honey, wax, and all European fruits. Its principal rivers are the Danube, Niefter, Pruthj Bardalach, and Ceret. 1 he inhabitants are Chriftians or the Greek church, and Jaffy is the principal town. It has been tributary to the Turks fince the year 1574 5 who appoint a prince who is a native of the country’ but have no regard to his being of the principal fami¬ lies. . I he province pays a large yearly tribute to the Turkiffi government ; befides raffing a great body of horfe at its own expence. MOLE, a river in Surry, which has taken its name from running under ground. It firft difappears at Box- hill, nearDarking, in the county of Surry, and emerges again near Leatherhead. Mole. See Talpa, Mammalia Index; and for methods of deftroying, fee Vermin, DeJh uBion of. Mole, in Midwifery, a mafs of fieffiy matter, of a fpherical MOL Mole, Moliere. fpherical figure, generated in the uterus, and fometimes miftaken for a child. See MiDWlFER'f. Mole, or Marie. See N^evus. Mole, in ArchiteBure, a maffive work formed of large ftones laid in the fea by means of coffer dams, ex¬ tended either in a right line or an arch of a circle, be¬ fore a port, which it ferves to clofe \ to defend the vef- fels in it from the impetuofity of the waves, and to pre¬ vent the paifage of (hips without leave. Thus we fay the mole of the harbour of Medina, &c. Mole is fometimes alfoufed to fignify the harbour itfelf. Mole, {mules), among the Romans, was alfo ufed for a kind of maufoleum, built in manner of a round tower on a fquare bafe, infulate, encompalfed with co¬ lumns, and covered with a dome.—ITe mole of the emperor Adrian, now the caflle of St Angelo, was the greateil and moft (lately of all the moles. It was crowned with a brazen pine apple, wherein was a gold¬ en urn containing the alhes of the emperor. Mole Cricket. See Gryllotalpa, Entomology Index Mole Hills. Thefe little hillocks of earth are a very great prejudice to the pafture lands, not only in wafting fo much of the land as they cover, but in obftrufting the feythe in mowing. In the weft of England they ufe a peculiar inftrument for the breaking up of thefe $ it is a flat board, very thick-; and of about eight inches in diameter, into which there is faftened a perpendicu¬ lar handle of three or four feet long. It has four broad and {harp iron 'teeth at the front, which readily cut through the hill, and fpread the earth it confifts of; and behind there is a large knob proper for breaking the clods with, if there are any. Some ufe a fpade, or other common inftrument, in the place of this, but not fo w7ell. There is, however, a much better inftrument even than this, for deftroying thefe hills, where they are in very great numbers. This is a kind of horfe ma¬ chine ; it has a (harp iron about three feet over, and with a ftrong back.—It is about four or five inches broad, and has two long handles for a horfe to be har- neffed to, and a crofs bar of iron to ftrengthen it at the bottom of the handles, reaching from the one handle to the other. The middle of this crofs bar is furnilhed with one, two, or more (harp pieces of iron like fmall ploughfhares, to cut the mole hills into two, three, or more parts. The iron behind is of a femicircular fi¬ gure. A fingle horfe is harnefled to this machine, and a boy muft be employed to drive it, and a man to hold and guide it; the (harp irons or (hares are the firft things that meet the hill, they run through it, break its texture, and cut it into feveral parts •, and the circu¬ lar iron following immediately behind them, cuts up the whole by the roots, and leaves the land level. This inftrument will deftroy as many mole hills in one day as a common labourer can do in eight, and wmuld be of very great advantage to the kingdom if brought into general ufe. MOLIERE, John Baptist, a celebrated French comedian and dramatic writer, whofe true name was Pocquelin, which for fome reafon he changed to that of Moliere. He was the fon of a valet de chambre, and was born at Paris about the year 1620. He went through the ftudy of the claflics under the Jefuits in the college of Clermont, and was defigned for the bar; but at his quitting the law fchools, he made choice of the adlor’s Vol. XIV. Part I. [ 3°5-1 MOL profeflion. From a ftrong attachment to the dfama, his whole ftudy and application were diredled to the ftage, and he continued till his death to exhibit plays,, which were greatly applauded. It is faid the firft mo¬ tive of his going upon the flage was to enjoy the com¬ pany of an atfrefs for wrhom he had contraefed a vio¬ lent fondnefs. His comedies are highly efteemed. And it is no wonder he fo juftly reprefented domeftic feuds, and the torments of jealous hufbands, or of thofe who have reafon to be fo ; for it is aflerted that no man-ever experienced this more than Moliere. His laft comedy was Le Malade Imaginaire, which was brought on the ftage in 1673 ; and Moliere died on the fourth night of its reprefentation 5 fome fay in a&ing the very part of the pretended dead man, which gave fome exercife for the wits of the time •, but according to others he died in his bed that night, from the burlting of a vein in his lungs by coughing. The king, as a laft mark, of his favour, prevailed with the archbilhop of Paris to fuffer him to be buried in confecrated ground though he had irritated the clergy by his Hartuff. I he moft efteemed editions of his works are that of Amfterdam, 5 vols. i2mo, 1699 ; and that of Paris, 6 vols. 4to, 1734‘ MOLINISTS, in ecclefiaftical hiftory, a (cef in the Romifti church, who follow the doiftrine and fentiments of the Jefuit Molina, relating to futficient and efficaci¬ ous grace. He taught that the op nations of divine grace were entirely confiftent with the freedom of hu* ' man will ; and he introduced a new kind of hypothefis to remove the difficulties attending the dodtrines of predeftination and liberty, and to reconcile the jarring opinions of Auguftines, Thomifts, Semi-Pelagians, and other contentious divines. He affirmed, that the de¬ cree of predeftination to eternal glory was founded up¬ on a previous knowledge and confideration of the merits of the eledfj that the grace, from whofe operation, thefe merits are derived, is not efficacious by its own intrinfic power only, but alfo by the confent of our own will, and becaufe it is adminiftered in thofe circumftances, in which the Deity, by that branch of his knowledge which is called feienlia media, forefees that it will be efficacious. The kind of prefcience, denominated in the fchools fci- entia media, is that foreknowledge of future contingents that arifes from an acquaintance with the nature and fa¬ culties of rational beings, of the circumftances in which they (hall be placed, of the objedts that {hall be pre- fented to them, and of the influence which their circum¬ ftances and objedts muft have on their adlions. MOLINOSISTS, a fedl among the Romanifts, who adhere to the dodlrine of Molinos. Thefe are the fame with what are otherwife called ^uietifts, whofe chief principle was, that men ought to annihilate themfelves in order to be united to God, and afterwards remain in quietnefs of mind, without being troubled for what (hall happen to the body. Molinos, the author of thofe opinions, was a Spanifh prieft, and was born in 1627. His 68 propofitions were examined in 1687 by the pope and inquifitors, who decreed that his dodlrine w-as falfe and pernicious, and that his books (hould be burn¬ ed. He was forced to recant his errors publicly in the Dominican church, and was condemned to perpetual imprifonment. He was then 60 years old, and had been fpreading his dodfrine 22 years before. He died in prifon in 1692. MOLLUGO, African chickweed ; a genus of £ q ^ plants MoiiniftS 1! Mollugo. MOL [ ] MOL Mc;IuLa, plants belonging to the triandrla clafs, and in the na- ^MuciLs. ^ turrj method rankind under the 22d order, Caryophyllei. See Botany lnd.tx, MOLLUSCA, in the Linnsean fyflem, one of the orders of vermes or worms. Thefe are limple naked animals, not included in a (hell, but furnifhed with limbs. See Helminthology Index. MOLOCH, a falfe god of the Ammonites, who de¬ dicated their children to him, by making them “ pafs through the fire,” as the Scriptures exprefs it. There are various opinions concerning this method of confe- cration'. Some think, the children leaped over a fire facred to Moloch ; others, that they paffed between two fires ; and others, that they were really burnt in the fire, by way of factifice to this god. There is foun¬ dation for each of thefe opinions. For, firft, it was ufual among the pagans to luftrate or purify with fire j and, in the next place, it is exprefsly faid, that the in¬ habitants of Sepharvaim burnt their children in the fire to Anamelech and Adramelech j much fuch deities as Moloch of the Ammonites. Mofes, in feveral places, forbids the Ifraelites to de¬ dicate their children to this god as the Ammonites did, and threatens death and utter extirpation to fuch per- fofts as were guilty of this abominable idolatry. And there is great probability that the Hebrews were much addicted to the \-orlhip of this deity : fince Amos, and after him St Stephen, reproaches them with having- carried along with them into the wildemefs the taber¬ nacle of their god Moloch. Solomon built a temple to Moloch upon the mount of Olives •, and Manaffeh, a long time after, imitated his impiety, by making his fon pafs through the fire in honour of Moloch. It was chiefly in the valley of Tophet and Hinnom, to the eaft of Jerufalem, that the Ifraelites paid their idolatrous worlhip to this falfe god of the Ammonites. There are various fentiments concerning the relation which Moloch had to the other pagan divinities. Some believe he was the fame with Saturn, to whom it is well known that human facrifices were offered. Others fuppofe him to be Mercury •, others, Mars *, others, Mi¬ thras 5 and others, Venus. Laftly, Others take Moloch to be the fun, or the king of heaven. Moloch was likewife called Mi/com; as appears from what is faid of Solomon, that he went after Afhtaroth the abomi¬ nation of the Zidonians, and Milcom the abomination of the Ammonites. MOLOSSES, Molasses, or MeiaJJes^ that grofs fluid matter remaining of fugar after refining, and which no boiling will bring to a confidence more folid than that of fyrup ; hence alfocalled fyrup of fugar. Properly, moloffes are only the fediment of one kind of fugar called chypre, or brown fugar, which is the refufe of other fugars not to be whitened or reduced into loaves. Moloffes ifre much ufed in Holland for the prepara¬ tion of tobacco, and alfo among poor people inftead of fugar. There is a kind of brandy or fpirit made of moloffes ; but by fome held exceedingly unwholefome. See below-. Artificial Molosses. There has been found a me¬ thod of making moloffes from apples without the ad¬ dition of fugar. The apple that fucceeds bell in this operation is a fummer fweeting of a middle fize, plea- fant to the tnffe, and fo full of juice that feven buihels Moloffes will yield a barrel of cyder. Jl rrL c , - . . i • i . Molucca 1 he manner ol making it is this : the apples are to jfl.inc}s_ be ground and preffed, then the juice is to be boiled ——y—— in a large copper, till three quarters of it be evapora¬ ted : this rvill bfe done with a moderate fire in about fix hours, with the quantity of juice above mentioned 5 by this time it will be of the confifience and tafte as well as of the colour of moloffes. This new- molaffes ferves all the purpofes of the com¬ mon kind, and is of great ufe in preferving cyder. Two quarts of it, put into a barrel of racked cyder, will pre- ferve it, and give it an agreeable colour. The invention of this kind of moloffes w-as owing to Mr Chandler of Woodftock in New England, who liv¬ ing at a diftance from the fea, ai d where the com¬ mon molaffes was very dear and fcarce, provided this for the fupply of his own family, and introduced the praftice among people of the neighbourhood. It is to be obferved, that this fort of apple, the fweeting, is of great ufe in making cyder ; one of the very belt kinds we know being made of it. The people in New- England alfo feed their hogs with the fallings of their orchards of thefe apples j and the confequence of this is, that their pork is the fineft in the world. Molosses Spirit; a very clean and pure fpirit, much ufed in England, and made from moloffes or common treacle diffolved in water, and fermented in the fame manner as malt or the common malt fpirit. See Di¬ stillation. MOLOSSI, a people of Epirus, who inhabited that part of the country which was called MoloJJtay or MoloJJits, from King Moloffus, a fon of Pyrrhus and Andromache. This country had the bay of Ambracia on the fouth, and the country of the Perrhaebeans on the eaft. The dogs of the place were famous, and re¬ ceived the name of MoloJJi among the Romans. Do- dona was the capital of the country, according to fome w-riters. Others, however, reckon it as the chief city of Thefprotia. MOLOSSUS, in the Greek and Latin poetry, a foot confifting of three long fyllables. As aitdiri^ can- tabant, virtutem. It takes its name either from a dance in ufe among the people called MoloJJi or Epirotce; or from the temple . of Jupiter Moloffus, where odes w-ere fung, in w-hich this foot had a great fiiare j or elfe becaufe the march of the Molofli, w hen they went to the combat, was compofed of thefe feet, or had the cadence thereof. The fame foot was alfo called among the ancients. Vertumnus, extenjipes, liippius, et cannius. MOLUCILLA, a genus of plants belonging to the didynamia clafs, and in the natural method ranking under the 4 2d order, Verticillatx. See Botany Index. MOLTEN-grease. See Farriery, N° 499. MOLUCCA ISLANDS, lie in the Eaft Indian fea under the line; of which there are five principal, name¬ ly, Ternate, Tydor, Machian, Motyr, and Bachian. The largeft of them is hardly 30 miles in circumfe¬ rence. They produce neither corn, rice, nor cattle, except goats : but they have oranges, lemons, and other fruits and are moft remarkable for fpices, efpe- cially cloves. They have large fnakes, which are not venomous, and very dangerous land crocodiles. At prefent they have three kings j and the Dutch, who arq MON Molwitz are very flrong here, keep out all other European na Mona t‘ons» being jealous of their fpice trade. The religion — / is idolatry ; but there are many Mahometans. They were difcovered by the Portuguefe in 1511, who fet¬ tled upon the coaft ; but the Dutch drove them away, and are now mafters of all thefe illands. MOLWITZ, a town of Silelia, in the province of Grotlka, remarkable for a battle gained by the Pruf- fians over the Auftrians in 1741. E. Long. 16. 45. N. Lat. 50. 26. MOLY. The name of this plant is rendered fa¬ mous by Homer : and hence has been much inquired into, as to its true fenfe, by the botaniits of almoft all times. I he old interpreters of Homer explain this word by the “ wild rue and the only reafon for this is, that at forae time, probably long after the days of Homer, the people of Cappadocia called the wild rue moly. But this plant is wholly different from the moly of Homer, which Theophraftus affirms grew in his time in Arcadia in great plenty, and had a round bulbous root like an onion, and long and graffy leaves like the fquill. On the whole, the moly of Homer feems to have been a fpecies of allium or garlic. MOLYBDENA, a metal. See Chemistry and Mineralogy Index. MOMBAZA, or Monbaza, a town of Africa, in an ifland of the fame name, with a calfle and a fort; feated on the eaftern coafl, oppofite to the country of Mombaza in Zanguebar, 75 miles fouth of Melinda, and fubjeft to Portugal. E, Long. 39. 30. S. Lat. 3. 15. Mombaza, a country of Africa in Zanguebar, fub- je£t to the Portuguefe, from whence they export Haves, gold, ivory, rice, fleffi, and other proviflons, with which they fupply the fettlements in Brafil. The king of this country being a Chriftian, had a quarrel with the Portuguefe governor, took the caftleby affault in 1631, turned Mahometan, and murdered all the Chriftians j but in 1729 they became mafters of the territory again. MOMENT, in the dodtrine of time, an inftant, or the moft minute and indivifible part of duration. MOMENTUM, in Mechanics, fignifies the fame with impetus, or the quantity of motion in a moving body ; which is always equal to the quantify of matter multiplied into the velocity 3 or, which is the fame thing, it may be confidered as a reflangle under the quantity of matter and velocity. See Mechanics. MOMORDICA, male balsam apple ; a genus of plants belonging to the monoecia clafs j and in the natural method ranking under the 34th order, Cucurbi- tacece. See Botany Index. MOM US, in fabulous hiftory, the god of raillery, or the jefter of the celeftial affembly, and wffio ridicu¬ led both gods and men. Being chofen by Vulcan, Neptune, and Minerva, to give his judgement concern¬ ing their wmrks, he blamed them all: Neptune for not making his bull with horns before his eyes, in order that he might give a furer blow; Minerva for building a houfe that could not be removed in cafe of bad neighbours 5 and Vulcan, for making a man wnthout a wdndow in his breaft, that his treacheries might be i'een. For his free reflefHons upon the gods, Momus , w^s driven from heaven. Pie is generally reprefented raffing a malk from his face, and holding a fmall figure in his hand. 5 [ 307 1 MON MONA, in Ancient Geography, tw7o iflands of this Mo-it name in the fea lying, between Britain and Ireland. I! I he one defcribed by Cmfar, as fituated in the middle paflage between both iflands, and ftretching out in ~ length from fouth to north. Called Monaa-da (Ptole- my); Monapia, or Monabia (Pliny). Suppofed to be the ifle of Man.—Another Mona, (Tacitus) 5 an ifland more to the fouth, and of greater breadth ; fituated on the coaft of the Ordovices, from which it is fepa- rated by a narrow ftrait. The ancient feat of the Druids. Now called Anglefey, the ifland of the An¬ gles or Englifh. Mona, an ifiand of the Baltic fea, fouth-wTeft of the ifland of Zealand, fubject to Denmark. E. Long. 12. 30. N. Lat. 55. 20. Mona. See Inchcolm. MONACO, a fmall but handfome and ftrong town of Italy, in the territory of Genoa, with a caftle, cita¬ del, and a good harbour. It is feated on a craggy rock, and has its own prince, under the prote&ion of France. E. Long. 7.-33. N. Lat. 43. 48. MONAD. See Leibnitzian Philofophy. MONADELPHIA, (from alone, and AkXtpux. a brotherhood;) a “ Angle brotherhood The name of the 16th clafs in Linnaeus’s fexual fyflem, confiflingof plants with hermaphrodite flowers; in which all the fta- mina are united below into one body or cylinder, through which pafies the piftillum. See Botany Index. MONAGHAN, a county of Ireland, fituated in the province of Ulfler, is bounded by Tyrone on the north, Armagh on the eaft, Cavan and Louth on the fouth, and Fermanagh on the w7eft. It is a mountain¬ ous tra£l, but in fome places is well improved. It con¬ tains 170,090 Irifh plantation acres, and is about 30 miles long and 22 broad. The linen trade of this county is averaged at 104,000]. yearly. Monaghan, the capital towmof the county of that name, is diftant 62 miles from Dublin, and gives title of baron to the family of Blayney. It was anciently called Muinechan. An abbey was founded here in a very early age, of wffiich Moelodius the fon of Aodh w7as abbot. In 1462, a monaftery for conventual Fran- cifcans was eredted on the file of this abbey, which was granted on. the general fuppreffion of monafteries to Edward Withe, and a caftle has been ftnce eredted on the fite by Edwrard Lord Blayney. MONANDRIA, (from /xovog alone, and xvrg a man or Jirjband), the name of the firft clafs in Linnmus’s fexual fyftem 5 confifting of plants with hermaphrodite flowers, which have only one flamen. MONARCHY, a large ftate governed by one ; or a ftate where the fupreme power is lodged in the hands of a Angle perfon. 1 he word comes from the Greek “ one who governs alone j” formed of [tove?. Joins, and imperium, “ government.” Of the three forms of government, viz. democracy, ariftocracy, and monarchy, the laft is the moft powerful, all the Anews of government being knit together, and united m the hand of the prince 5 but then there is imminent danger of his employing that (Length to improvident or oppreflive purpofes. Asa democracy is the beft cal¬ culated to diredt the end of a law, and an ariftocracy to invent the means by which that end (hall be obtained, a monarchy is moft At for carrying thofe means into exe¬ cution. O q 2 The MON [ 308 ] MO N Manarchy. The moft ancient monarchy was that of the Affy- jians, which was founded foon after the deluge. We iifually reckon four grand or univerfal monarchies ; the AlTyrian, Perfian, Grecian, and Roman ; though St AugufUne makes them but two ; viz. thofe of Baby¬ lon and Rome. Belus is placed at the head of the feries of AiTyrian kings who reigned at Babylon, and *■ is by profane authors efleemed the founder of it, and by feme the fame whom the Scriptures call Nimrod. The principal AlTyrian kings after Belus were Ninus, who built Nineveh, and removed the feat of empire to it f Semiramis, who, difguifing her fex, |took pofief- lion of the kingdom inllead of her fon, and was killed and fucceeded by her fon Ninyas; and Sardanapalus, the laft of the Affyrian monarchs, and more effeminate than a -woman. After his death the Affyrian empire was fplit into three feparate kingdoms, viz. the Me¬ dian, Alfyrian, and Babylonian. The firft king of the Median kingdom was Arbaces •, and this kingdom lafted till the time of Aftyages, who was fubdued and diverted of his kingdom by Cyrus. In the time ©f Cyrus there arofe a new and fecond monarchy called the Perfian, which flood upwards of 200 years from Cyrus, whofe reign began A. M. 3468, to Darius Codomannus, wdio was conquered by Alex¬ ander, and the empire tranflated to the Greeks A. M. 3674.—The firft monarch was Cyrus, founder of the empire. 2. Cambyfes, the fon of Cyrus. 3. Smer- dis. 4. Darius, the fon of Hyftafpis, who reigned 521 years before Chrirt. 5. Xerxes, who reigned 485 years before Chrirt. 6. Artaxerxes Longimanus, who reigned 464 years before Chrift. 7. Xerxes the fe¬ cond. 8. Ochus, or Darius, called Nothus, 424 years before Chrift. Cf. Artaxerxes Mnemon, 405 years before Chrift. 10. Artaxerxes Ochus, 359 years before Chrift. 11. Arfes, 338 years before Chrift. 12. Darius Codomannus, 336 years before Chrift, who was defeated by Alexander the Great, and deprived of his kingdom and life about 331 years before Chrift : the dominion of Perfia after his death was tranftated to the Greeks. The third monarchy was the Grecian. As Alex¬ ander, when he died, did not declare- who ftrould fuc- ceed him, there ftarted up as many kings as there were commanders. At firft they governed the provinces that were divided among them under the title of vice¬ roys 5 but when the family of Alexander the Great was extin6t, they took upon them the name of kings. Hence, in procefs of time, the whole empire of Alex¬ ander produced four diftinft kingdoms, viz. 1. The Macedonian ; the kings of which, after Alexander, were Antipater, Caffander, Demetrius Poliorcetes, Se- leucus Nicanor, Meleager, Antigonus Dofon, Philip, and Perfeus, under whom the Macedonian kingdom was reduced to the form of a Roman province. 2. The Afiatic kingdom, which upon the death of Alexander fell to Antigonus, comprehending that country now called Natolia, together with fome other regions be¬ yond Mount Taurus. From this kingdom proceeded two lefler ones, viz. that of Pergamus, whofe laft king, Attalus, appointed the Roman people to be his heir 5 and Pontus, reduced by the Romans into the form of a province, when they had fubdued the laft king, Mith-. ridates. 3. The Syrian, of whofe tw-enty-two kings the rnoft celebrated were, Seleucus Nicanor, founder of the kingdom; Antlochus Deus; Antiochus the Great; Monarchy Antiochus Epiphancs; and Tigranes, who was con- II quered by the Romans under Pompey, and Syria re. Monaftere- duced into the form of a Roman province. 4. The ■ ^ ' . Egyptian, which was formed by the Greeks in Egypt, and flourilhed near 240 years under 1 2 kings, the prin¬ cipal of w hom wrere, Ptolemy Lagus, its founder ; Pto¬ lemy Pbiladelphus, founder of the Alexandrian library ; and Queen Cleopatra, who was overcome by Auguftus, in confequence of which Egypt was added to the demi¬ nion of the Romans. The fourth monarchy was the Roman, which lafted 244 years, from the building of the city until the time when the royal power w'as abrogated. The kings of Rome were Romulus, its founder ; Numa Pompilius ; Tullus tloftilius; Ancus Martius; Tarquinius Prif- cus ; Servius Tullius ; and Tarquin the Pround, who was baniftied, and with whom terminated the regal porver. There feems in reality no neceffity to make the Medes, Perfians, and Greeks, fucceed to the whole power of the Aflyrians, to multiply the number of the monarchies. It was the fame empire ftill; and the feveral changes that happened in it did not confti- tute different monarchies. Thus the Roman empire wras fucceffively governed by princes of different na¬ tions, yet without any new monarchy being formed thereby. Rome, therefore, may be faid to have imme¬ diately fucceeded Babylon in the empire of the world. See Empire. Of monarchies fome are abfolute and defpotic, where the will of the monarch is uncontroulable ; others are limited, where the prince’s authority is reftrained by laws, and part of the fupreme power lodged in other hands, as in Britain. See Government. Some monarchies again are hereditary, where the fucceflion devolves immediately from father to fon ; and others are eleftive, where, on the death of the monarch, his fucceffor is appointed by ele&ion, as in Poland. Fifi/i-Monarchy Men, in the ecclefiaftical hiftory of England, were a fet of wrong-headed and turbu¬ lent enthufiafts who arofe in the time of Cromwell, and who expedted Chrift’s fudden appearance upon earth to eftablifh a new kingdom ; and, a£lihg in confequence of this illufion, aimed at the fubverfton of all human government. MONARDA, Indian horehound, a genus of plants belonging to the diandria clafs ; and in the natu¬ ral method ranking under the 42cf order Verticillatce. See Botany Index. MONASTEREVAN, a port town of Ireland, in the county of Kildare and province of Leinfter, 36 miles from Dublin, fo called from a magnificent abbey which was founded here, in which St Evan in the be¬ ginning of the 7th century placed a number of monks from South Munfter, and which had the privilege of being a fanftuary. The confecrated bell, which be¬ longed to this faint, was on folemn trials fworn upon by the whole tribe of the Eoganachts, and was always committed to the care of the Mac Evans, hereditary chief juftices of Munfter; the abbot of this heufe fat as a baron in parliament.—At the general luppreftion of monafteries, this abbey was granted to Lord Audley, who afligned it to Vifcount Ely. It afterwards came into MON r 309 ] MON Monaftery. into the family of Moor, earls of Drogheda, and has been beautifully repaired by the prefent Lord Drogheda, ftill wearing the venerable appearance of an abbey. There is a nurfery at Monafterevan for the charter fchools of the province of Leinfler j and the grand canal has been carried up to this town from Dublin, fince which it has been much improved and enlarged with feveral new buildings. MONASTERY, a convent or houfe built for the reception of religious $ whether it be abbey, priory, nunnery, or the like. Monastery is only properly applied to the houfes of monks, mendicant friars, and nuns. The reft are more properly called religious houfes. For the origin of monafteries, fee Monastic and Monk. The houfes belonging to the feveral religious orders which obtained in England and Wales were, cathe¬ drals, colleges, abbeys, priories, preceptories, com- mandries, hofpitals, friaries, hermitages, chantries, and free chapels. Thefe were under the dire&ion and management of various officers. The diffolution of houfes of this kind began fo early as the 1312, when the Templars were fuppreffed ; and in 1323 their lands, churches, advowfons, and liberties, here in England, were given by 17 Ed. II. ft. 3. to the prior and brethren of the hofpital of St John at Jerufalem. In the years I39°> I437> I44I» ,I459> i497».I5°5» 1508, and 1515, feveral other houfes were diffolved, and their revenues fettled on different colleges in Oxford and Cambridge. Soon after the laft period, Cardinal Wol- fey, by licenfe of the king and pope, obtained a dif¬ folution of above 30 religious houfes for the founding and endowing his colleges at Oxford and Ipfwich. About the fame time a bull was granted by the fame pope to Cardinal Wolfey to fupprefs monafteries, where there were not above fix monks, to the value of 8000 ducats a-year, for endowing Windfor and King’s Col¬ lege in Cambridge •, and two other bulls were granted to Cardinals Wolfey and Campeius, where there were lefs than twelve monks, and to annex them to the greater monafteries $ and another bull to the fame car¬ dinals to inquire about abbeys to te fuppreffed in or¬ der to be made cathedrals. Although nothing ap¬ pears to have been done in confequence of thefe bulls, the motive which induced Wolfey and many others , to fupprefs thefe houfes was the defire of promoting learning ; and Archbifliop Crammer engaged in it with a view of carrying on the Reformation. There were other caufes that concurred to bring on their ruin : many of the religious were loofe and vicious j the monks were generally thought to be in their hearts attached to the pope’s fupremacy.} their revenues were not employed according to the intent of the do¬ nors } many cheats in images, feigned miracles, and counterfeit relicks, had been difcovered, which brought the monks into difgrace j the Obfervant friars had op- pofed the king’s divorce from Queen Catharine 5 and thefe circumftances operated, in concurrence with the king’s want of a fupply and the people’s defire to fave their money, to forward a motion in parliament, that in order to fupport the king’s ftate and fupply his wants, all the religious houfes might be conferred up¬ on the crown which were not able to fpend above 200I. a-year j and an adl was paffed for that purpofe 27 Hen. VIII. c. 28. By this ad! about 380 houfes were Monaftery. diffolved, and a revenue of 30,000!. or 32,000!. a-year ,J came to the crown j befides about ioo,oool. in plate and jewels. The fuppreflion of thefe houfes occafion- ed difcontent, and at length an open rebellion : when this was appeafed, the king refolved to fupprefs the reft of the monafieries, and appointed a new vifita- tion : which caufed the greater abbeys to be furren- dered apace j and it was ena&ed by 31 Hen. VIH. c. 13. that all monafteries, &c. which have been fur- rendered fince the 4th of February, in the 27th year of his majefty’s reign, and which hereafter (hall be fur- rendered, Ihall be veiled in the king. The knights of St John of Jerufalem were alfo fuppreffed by the 32 Hen. VIII. c. 24. The fuppreflion of thefe greater houfes by thefe two a6ts produced a revenue to the king of above ioo,oool. a-year, befides a large fum in plate and jewels. The laft a£t of diffolution in this king’s reign was the adl of 37 Hen. VIII. c. 4. for diffolving colleges, free chapels, chantries, &c. which adl was farther enforced by 1 Edw. VI. c. 14. By this adl were fuppreffed go colleges, no hofpitals, and 2374 chantries and free chapels. The number of houfes and places fuppreffed from firft to laft, fo far as any calculations appear to have been made, feems to be as follow : Gf leffer monafteries, of which we have the va¬ luation, - 1 Of greater monafteries, Belonging to the hofpitallers, Colleges, Hofpitals, Chantries and free chapels, 374 186 48 90 no 2374 Total 3182 Befides the friars houfes and thofe fuppreffed by Wol¬ fey, and many fmall houfes of which we have no parti¬ cular account. The fum total of the clear yearly revenue of the feveral houfes at the time of their diffolution, of which we have any account, feems to be as follow : Of the greater monafteries, L. 104,919 13 34. Of all thofe of the leffer monafteries of which we have the valuation, 29,702 1 Knights hofpitallers head houfe in London 2385 12 8 We have the valuation of only 28 of their houfes in the country 3026 9 5 Friars houfes ©f which we have the valuation 731 2 o|> Total L. 140,786 19 3I- If proper allowances are made for the leffer monafte- ries and houfes not included in this eftimate, and for the plate, &c. which came into the hands of the king by the diffolution, and for the value of money at that time, which was at leaft fix times as much as at pre¬ fent, and alfo confidcr that the eftimate of the lands was generally fuppofed to be much under the real worth, we muft conclude their whole revenues to have been immenfe. It does not appear that any computation hath been made of the number of perfons contained iq the re¬ ligious houfes. Thofe MON Is "Monaftery, Thofc of tlie leffer monafteries diffolved by .Monafhc. yin. were reckoned at about 10,000 If we fuppofe the colleges and hofpitals to have contained a proportionable number, thefe will make about - - 5347 If we reckon the number in the greater mona¬ fteries, according to the proportion of their revenues, "they will be about 35,000 j but as probably they had larger allowances in proportion to their number than thofe of the leffer monafteries, if we abate upon that account 5000, they will then be 30,000 One for each chantry and free chapel, 2374 Total 47,721 But as there were probably more than one perlbn to officiate in feveral of the free chapels, and there wrere other houfes which are not included within this calcu¬ lation, perhaps they may be computed in one general eftimate at about 50,000. As there were penfions paid to almoft all thofe of the greater monafteries, the king did not immediately come into the full enjoy¬ ment of their whole revenues : however, by means of what he did receive, he founded fix new. biffioprics, viz. thofe of Weftminfter (which was changed by Queen Elizabeth into a deanery, with twelve prebends and a fchool), Peterborough, Chefter, Gloucefter, Briftol, and Oxford. And in eight other fees he fonnded deaneries and chapters, by converting the priors and monks, into deans and prebendaries, viz. Canterbury, Winchefter, Durham, Worcefter, Roche- fter, Norwich, Ely, and Carlifle. He founded alfo the colleges of Chrift-church in Oxford and Trinity in Cam¬ bridge, and finifhed King’s college there. He like- W’ife founded profefforffiips of divinity, law, phyfic, and of the Hebrew and Greek tongues, in both the faid univerfities. He gave the houfe of Greyfriars and St Bartholomew’s hofpital to the city of London, and a perpetual penfion to the poor knights of Wind- for, and laid out great firms in building and fortifying many ports in the channel. It is obfervable, upon the whole, that the diffolution of thefe houfes was an abl, not of the church, but of the ftate j in the pe¬ riod preceding the Reformation, by a king and par¬ liament of the Roman catholic communion in all points except the king’s fupremacy $ to which the pope him- felf, by his bulls and licenfes, had led the way. MONASTIC, fomething belonging to monks, or the monkifli life. The monaftic profeffion is a kind of civil death, which in all worldly matters has the fame effeft wfith the natural death. The council of Trent, &c. fix fixteen years for the age at which a perfon may be admitted into the monaftical ftate. St Anthony is the perfon who, in the fourth cen¬ tury, firft inftituted the monaftic life; as St Pacho- mius, in the fame century, is faid to have firft fet on •foot the coenobitic life, 1. e. regular communities of religious. In a ftiort time the deferts of Egypt be¬ came inhabited with a fet of folitaries, who took up¬ on them the monaftic profeffion. St Bafil carried the monkifti humour into the eaft, where he compofed a rule which afterwards obtained through a great part of the weft. In the nth century the monaftic difcipline was grown very remifs. St Odo firft began to retrieve it 4 o ] MON in the monafiery of ^luny j that monaftery, by the Monda conditions of its eredion, was put under the immediate II protedion of the holy fee ; with a prohibition to all Mon^tan- powers, both fecular and ecclefiaftic?!, to difturb the u—y— monks in the polfeffion of their effeds or the eledion of their abbot. In virtue hereof they pleaded an exemp¬ tion from the jurifdidion of the biffiop, and extended this privilege to all the houfes dependent on Cluny. This made the firft congregation of feveral houfes, under one chief immediately fubjed to the pope, fo as to conftitute one body, or, as they now call it, one religious order. Till then, each monaftery was inde¬ pendent and fubjed to the biffiop. See Monk. MONDA, or Mu NBA, in Ancient Geography} a river of Lufitania, running mid-way from eaft to weft into the Atlantic, between the Durius and Tagus, and wafhing Conimbrica. Now the Mondego, a river of Portugal, which running by Coimbra, falls into the Atlantic, 30 miles below it. MONDAY, the fecond day of the week, fo called as being anciently facred to the moon j q. d. moon- day. MONDOVI, a confiderable town of Italy, in Piedmont 3 with a citadel, univerfity, and bilhop’s fee. It is the largeft and moft populous town of Piedmont, and is feated in E. Long. 8. 6. N. Lat. 44- 33- MONEMUGI, an empire in the fouth of Africa, has Zanguebar on the eaft, Monomotapa on the fouth, Motamba and Makoko on the weft, and Abyffinia on the north and partly to the eaft, though its boun¬ daries that way cannot be afcertained. It is divided into the kingdoms of Mujaco, Makoko or Anfiko, Gingiro, Cambate, Alaba, and Monemugi Proper. This laft lies in the middle of the torrid zone, and a- bout the equinoftial line, fouth of Makoko, weft of Zanguebar, north of Monemotapa, and eaft of Con¬ go and of the northern parts of Monomotapa. To afcertain its extent, is too difficult a talk, being | a country fo little frequented. The country known, a- bounds with gold, filver, copper mines, and elephants. The natives clothe themfelves in filks and cottons, which they buy of ftrangers, and wear collars of tranf- parent amber beads, brought them from Cambaya: which beads ferve alfo inftead of money ; gold and fil¬ ver being too common, and of little value among them. Their monarch always endeavours to be at peace with the princes round about him, and to keep an open trade with Quitoa, Melinda, and Mombaza, on the eaft, and with Congo on the weft 3 from all which places the black merchants refort thither for gold. The Portuguefe merchants report, that on the eaft fide of Monemugi there is a great lake full of fmall iflands, abounding with all forts of fowl and cattle, and inhabited by negroes. They relate alfo, that on the main land eaftward they heard fometimes the ringing of bells, and that one could obferve buildings very much like churches 3 and that from thefe parts came men of a brown and tawny complexion, who traded with thofe iflanders, and with the people of Monemugi. This country abounds in palm wine, oil, and honey. MONETARIUS, or Moneykr, a name which an¬ tiquaries and medalifts give, to thofe who ftruck the an¬ cient coins or monies. Many of the old Roman, &c. coins have the name of MON t 31 Money, of the mandarins, either written at length, or at leaft —'"V—-' the initial letters of it. See Medal. MONEY, a piece of matter, commonly metal, to which public authority has affixed a certain value and weight to ferve as a medium in commerce. See Coin, Commerce, and Medals ; alfo the article Bank. Money is ufually divided into real or effective, and imaginary or money of account, I. Rzal Money. i. Hijlory of real money. Real money includes all coins, or fpecies of gold, lilver, copper, and the like ; which have courfe in common, and do really exift. Such are guineas, piftoles, pieces of eight, ducats, &c. Real money, civilians obferve, has three effential qualities, viz. matter, form, and weight or value, For the matter, copper is that thought to have been firft coined 5 afterwards filver ; and laftly gold, as be¬ ing the moil beautiful, fcarce, cleanly, divifible, and pure of all metals. The degrees of goodnefs are expreffed in gold by carats $ and in filver by pennyweights, &c. For there are feveral reafons for not coining them pure and with¬ out alloy, viz. the great lofs and expence in refining them, the neceffity of hardening them to make them more durable, and the fcarcity of gold and filver in molt countries. See Alloy. Among the ancient Britons, iron rings, or, as fome fay, iron plates, were ufed for money ; among the La¬ cedemonians, iron bars quenched with vinegar, that they might not ferve for any other ufe. Seneca ob- ferves, that there was anciently damped money of lea¬ ther, corium forma pub lie a impreffum. And the fame thing was put in practice by Frederic II. at the liege of Milan ; to fay nothing of an old tradition among ourfelves, that in the confufed times of the barons wars the like was done in England : but the Hollan¬ ders, we know, coined great quantities of pafteboard in the year 1574. iks to the form of money, it has been more various than the matter. Under this are comprehended the weight, figure, impreffion, and value. For the impreffion, the lews, though they detefted images, yet damped on the one fide of their fhekel the golden pot which held the manna, and on the other Aaron’s rod. The Dardans damped two cocks fight¬ ing. The Athenians damped their coins with an owl, or an ox ; whence the proverb on bribed lawyers, Bos in lingua. They of ^Egina, with a tortoife } whence that other faying, Virtutem et fapientiam vincunt tejlu- dines. Among the Romans, the monetarii fometimes impreiled the images of men that had been eminent in their families on the coins: but no living man’s head was ever damped on a Roman coin till after the fall of the commonwealth. From that time they bore the em¬ peror’s head on one fide. From this time the practice of damping the prince’s image on coins has obtained among all civilized nations; the Turks and other Ma¬ hometans alone excepted, who, in detedation of images, inferibe only the prince’s name, with the year of the tranfmigration of their prophet. As to the figure, it is either round, as in Britain ; multangular or irregular, as in Spain j fquare, as in fome parts of the Indies 3 or nearly globular, as in mod of the red,. i ] MON Alter the arrival of the Romans in this ifland, the Britons imitated them, coining both gold and filver with the images of their kings damped on them. When the Romans had fubdued the kings of the Bri¬ tons, they alfo fuppreffed their coins, and brought in their own 3 which were current here from the time of Claudius to that of Valentinian the younger, about the fpace of 500 years. Mr Camden obferves, that the mod ancient Englifh coin he had known was that ol Ethelbert king of Kent, the fird Chridian king in the idand 3 in whofe time all money accounts begin to pafs by the names of pounds, Jhillings, pence, and mancufes. Pence feems borrowed from the Latin pecunia, or rather from pendo, on ac¬ count of its jud weight, which was about threepence of our money. Thefe were coarfely damped with the king’s image on the one fide, and either the mint- mader’s, or the city’s where it was coined, on the other. Five of thefe pence made their fchilling, pro¬ bably fo called from fei/ingus, which the Romans ufed for the fourth part of an ounce. Forty of thefe fchil- lings made their pound 3 and 400 of thefe pounds were a legacy, or a portion for a king’s daughter, as appears by the lad will of King Alfred. By thefe names they trandated all fums of money in their old Englilh teda- ment 3 talents by pundes ; Judas’s thirty pieces of filver by thirtig fcillinga ; tribute money, by pennimng; the mite by feorthling. But it mud be obferved, they had no other real mo¬ ney, but pence only 3 the red being imaginary moneys, i. c. names of numbers or weights. Thirty of thefe pence made a mancus, which fome take to be the fame with a mark ; manca, as appears by an old MS. was quinta pars uncite. Thefe mancas or mancufes were reckoned both in gold and filver. For in the year 680 we read that Ina king of the Wed Saxons obliged the Kentidunen to buy their peace at the price of 30,000 mancas of gold. In the notes on King Canute’s laws, we find this didindtion, that mancufa was as much as a mark of filver, and manca, a fquare piece of gold, valued at 30 pence. The Danes introduced a way of reckoning money by ores, per oras, mentioned in Domefday book 3 but whether they were a feveral coin, or a certain fum, does not plainly appear. This, however, may be ga¬ thered from the Abbey book of Burton, that 20 ores were equivalent to two marks. They had alfo a gold coin called by%antine, or bezant, as being coined at Condantinople, then called Byzantium. The value of which coin is not only now lod, but was fo entirely forgot even in the time of King Edward III. that whereas the bifhop of Norwich was fined a byzantine of gold to be paid the abbot of St Edmund’s Bury for infringing his liberties (as it had bc-en ena&ed by parliament in the time of the Conqueror^, no man then living could tell how much it was 3 fo it was referred to the king to rate how much he dmuld pay. Which is the more unaccountable, becaufe but 10.0 years be¬ fore, 200,000 bezants were exadded by the foldan for the ranfom of St Louis of France t which were then valued at 100,000 livres. Though the coining of money be a fpecial prero¬ gative of the king, yet the ancient Saxon princes com¬ municated it to their fubjetds 3 infomuch that in every good town there was at lead one mint 3 but at Lon¬ don Money. MON [ 312 ] * M O N Money. cJyn eight ; at Canterbury four for tfie king, two for ~the archbifliop, one for the abbot at Winchefter, hx at Rochefter, at Haftings two, &c. The Norman kings continued the fame cuftom of coining only pence, with the prince’s image on one fide, and on the other the name of the city where it was coined, with a crofs fo deeply impreffed, that it might be eafily parted and broke into two halves, which, fo broken, they called halfpence; or into four parts, w hich they called fourthings or farthings. In the time of King Richard I. money coined in the eaft parts of Germany came in fpecial requeft in Eng* land on account of its purity, and was called eajlerling fnoney, as all the inhabitants of thofe parts were called Ea/lerlings. And ihortly after, fome of thofe people Ikiiled in coming were lent for hither, to bring the coin to perfection ; w hich fince has been called Jlerling for Eajlerling. See STERLING. King Edward I. who firfl adjufted the meafure of an ell by the length of his arm, herein imitating Charles the Great, was the firft alfo w ho eftabhihed a certain fiandard for the coin, which is expreffed to this effect by Greg. Rockley, mayor of London, and mint-ma- fter.—“ A pound of money containeth twelve ounces : .m a pound there ought to be eleven ounces, twro ealf- erlings, and one farthing ; the reft alloy. The faid pound ought to wTeigh twenty (hillings and three pence in account and wTeight. The ounce ought to weigh twrenty pence, and a penny tw'enty-four grains and a half. Note, That eleven ounces twm pence fterling ought to be of pure filver, called leaf fiver ; and the minter muft add of other weight feventeen pence half¬ penny farthing, if the filver be fo pure.” About the year 1320, the ftates of Europe firft be¬ gan to coin gold ; and among the reft, our King Ed¬ ward III. The firft pieces he coined were called flo- rences, as being coined by Florentines: afterwards he coined nobles ; then rofe-nobles, current at 6s. 8d. half nobles called half pennies, at 3s. 4ft. of gold ; and quarters at 2od. called farthings of gold. The fucceed- ing kings coined rofe-nobles, and double rofe-nobles, great fovereigns, and half Henry nobles, angels, and Ihillings. King James I. coined units, double crowns, Britain crowns : then crowns, half-crowns, &c. 2. Comparative value of Money and Commodities at different periods. The Englilh money, though the fame names do by no means correfpond wdth the fame quan¬ tity of precious metal as formerly, has not changed fo much as the money of moft other countries. From the time of William the Conqueror, the proportion between the pound, the (hilling, and the penny, feems to have been uniformly the fame as at prefent. Edward III. as already mentioned, was the firft of our kings that coined any gold ; and no copper was coined by authority before James I. Thefe .pieces were not called farthings, but farthing tokens, and all people were at liberty to take or refufe them. Before the time of Edward III. gold w7as exchanged, like any other commodity, by its weight; and before the time of James I. copper wTas (lamped by any one perfon who chofe to do it. In the year 712 and 727, an ewe and lamb were rated at is. Saxon money till a fortnight after Eafter. Between the years 900 and 1000, two hydes of land, 3 each containing about 120 acres, were fold for loo (hillings. In 1000, by King Ethelred’s laws, a horfe was rated at 30s. a mare or a colt of a year old, at 20s. a mule or young afs, at 1 2s. an cx at 30s. a cow at 24s. a fwine at 8d. a fheep at is In 1043, a quarter of wheat w7as fold for 6od. Hence it is computed, that in the Saxon times there was ten times lefs money, in proportion to commodities, than at prefent. Their nominal fpecie, therefore, being about three times high¬ er than ours, the price of every thing, according to our prefent language, muft be reckoned thirty times cheaper than it is now. In the reign of William the Conqueror, commodi¬ ties were ten times cheaper than they are at prefent.; from which wre cannot help forming a very high idea of the wealth and powder of that king : for his revenue was 400.000I. per annum, every pound being equal to that weight of filver, confequently the whole may be eftimated at 1,200,000!. of the prefent computa¬ tion j a fum wdiich, confidering the different value of money between that period and the prefeiit, was equi¬ valent to 12,000,cool, of modern eftimation. The moft neceffary commodities do not feem to have advanced their price from William the Conqueror to Richard I. The price of corn in the reign of Henry III. was near half the mean price in our times. Bithop Fleet- wood has (liown, that in the year 1240, which w^as in this reign, 4I. 13s. pd. was worth about 50I. of our pre¬ fent money. About the latter end of this reign, Robert de Hay, redlor of Souldern, agreed to receive loos, to purchafe to himfelf and fuccelfor the annual rents of 5s. in full compenfation of an acre of corn. Burchers meat, in the time of the great fcarcity in the reign of Edward II. was, by a parliamentary or¬ dinance, fold three times cheaper than our mean price at prefent ; poultry fomewhat low’er, becaufe being now confidered as a delicacy, it has rifen beyond its proportion. The mean price of corn at this period was half the prefent value, and the mean price of cattle one eighth. In the next reign, which was that of Edward III. the mod necelfary commodities were in general about three or four times cheaper than they are at prefent. In thefe times, knights, who ferved on horfcback in the army, had 2s. a day, and a foot archer 6d. which lad would now be equal to a crown a-day. This pay has continued nearly the fame nominally (only that in the time of the commonwealth the pay of the horfe was advanced to 2s. 6d. and that of the foot is. though it was reduced again at the Reftora- tion), but foldiers were proportionably of a better rank formerly. In the time of Henry VI. corn was about half its prefent value, other commodities much cheaper. Bi- (hop Fleetwood has determined, from a mod accurate confideration of every circumftance, that 3I. in this reign was equivalent to 28I. or 30I. now. In the time *,f Henry VII. many commodities were three times as cheap here, and in all Europe, as they are at prefent, there having been a great in- creafe of gold and diver in Europe fince his time occa- (ioned by the difeovery of America. The commodities whofe price has rifen the moft fince before the time of Henry VII, are butchers meat, ‘ fowls, Money. ■ ■■ Mwaadf # MON [313] MON Money, fowls, and fifh, efpecially the latter. And the reafon why corn was always much dearer in proportion to other eatables, according to their prices at prefent, is, that in early times agriculture was little underrtood. It required more labour and expence, and was more precarious than it is at prefent. Indeed, notwith- ilanding the high price of corn in the times we are fpeaking of, the raifing of it fo little anfwered the ex¬ pence, that agriculture was almoft univerfally quitted for grazing j which was more profitable, notwithttand- ing the low price of butchers meat. So that there was' conftant occafion for ftatutes to reftrain grazing, and to promote agriculture $ and no effe&ual remedy was found till the bounty upon the exportation of corn j fince which, above ten times more corn has been raifed in this country than before. The price of corn in the time of James I. and con- fequently that of other necefi'aries of life, was not lower, but rather higher, than at prefent : wool is not two thirds of the value it was then ; the finer manu- fa&ures having funk in price by the progrefs of art and induftry, notwithftanding the increafe of money. Butchers meat was higher than at prefent. Prince Henry made an allowance of near 4d. per pound for all the beef and mutton ufed in his family. This may be true with refpeft to London $ but the price of butchers meat in the country, which does not even now much exceed this price at a medium, has certainly greatly increafed of late years, and particularly in the northern counties. The prices of commodities are higher in England than in France j befides that the poor people of France live upon much lefs than the poor in England, and their armies are maintained at lefs expence. It is computed by Mr Hume, that a Britilh army of 20,®oo men, is maintained at near as great an expence as 60,000 in France, and that the Englilh fleet, in the war of 1741, required as much money to fupport it as all the Roman legions in the time of the emperors. However, all that we can conclude from this is, that money is much more plentiful in Europe at prefent than it wTas in the Roman empire. In the 13th century, the common intereft which the Jews had for their money, Voltaire fays, was 20 per cent. But with regard to this, we muft confider the great contempt that nation was always held in, the large contributions they were frequently obliged to pay, the riik they ran of never receiving the princi¬ pal, the frequent confifcations of all their effects, and the violent perfecutions to which they were expofed j in which circumftances it was impoflible for them to lend money at all, unlefs for moft extravagant intereft, and much difproportioned to its real value. Before the difcovery of America, and the plantation of our colonies, the intereft of money was generally 12 per cent, all over Europe; and it has been growing gra¬ dually lefs fince that time, till it is now generally about four or five. When fums of money are faid to be raifed by a whole people, in order to form a juft eftimate of it, we muft take into confideration not only the quantity of the precious metal according to the ftandard of the coin, and the proportion of the quantity of coin to the commodities, but alfo the number and riches of the people who raife it; for populous and rich coun- Vol. XIV. Part I. tries will much more eafily raife any certain fum of Money, money than one that is thinly inhabited, and chiefly v by poor people. This circumftance greatly adds to our furprife at the vaft fums of money railed by Wil¬ liam the Conqueror, wdio had a revenue nearly in value equal to i2,qoo,ooo1. of our money (allowance being made for the ftandard of coin and the proportion it bore to the commodities), from a country not near fo populous or rich as England is at prefent. Indeed, the accounts hiftorians give us of the sevenues of this ■ prince, and the treafure he left behind him, are barely credible. II. Imaginary Money, or Money of Account, is that which has never exifted, or at leaft which does not exift in real fpecie, but is a denomination invented or retained to facilitate the dating of accounts, by keep¬ ing them ftill on a fixed footing, not to be changed, like current coins, which the authority of the fovereign raifes or lowers according to the exigencies of the ftate. Of which kind are pounds, livres, marks, maravedies, &c. See the annexed Table, where the fidlitious mo¬ ney is diftinguithed by a dagger(f). Moneys of Account among the Ancients.—1. The Gre¬ cians reckoned their fums of money by drachma, mintc, and talenta. The drachma was equal to y^d. fterling; 100 drachmae made the mina, equal to 3I. 4s. yd. fter¬ ling 5 60 minae made the talent, equal to 193I. 15s. fterling ; hence 100 talents amounted to 19,375!. fter¬ ling. The mina and talentum, indeed, were different in different provinces : their proportions in Attic drachms are as follow : The Syrian mina contained 25 Attiq drachms 5 the Ptolemaic 33^- j the Antiochic and Eu- boean 100; the Babylonic ii6j the greater Attic and Tyrian 133-fj the Aiginean and Rhodian i66y. The Syrian talent contained 15 Attic minae 5 the Ptolemaic 20 j the Antiochic 60 j the Euboean 60 ; the Babylo¬ nic 70 5 the greater Attic and Tyrian 80 j the ^Egi- nean and Rhodian 100. 2. Roman moneys of account were the fejlertius and fejlertium. The leftertius was equal to id. 3^q. fter¬ ling. One thoufand of thefe made the feftertium, equal to 81. is. jd. 2q. fterling. One thoufand of thefe feftertia made the decies feftertium (the adverb centies being always underftood) equal to 8072I. 18s. 4d. fterling. The decies feftertium they alfo called decies centena millia nummum. Centies feftertium, or centies HS, were equal to 80,729!. 3s. 4d. Millies HS to 807,291!. 13s. 4d. Millies centies HS to 888,020!. 16s. 8d. Theory of Money. 1. Of Artificial or Material Money. I. As far back as our accounts of the tranfa&ions of mankind reach, w*e find they had adopted the pre¬ cious metals, that is, filver and gold, as the common meafure of value, and as the adequate equivalent for every thing alienable. The metals are admirably adapted for this purpofe : they are perfedlly homogeneous ; when pure, their maffes, or bulks, are exa&ly in proportion to their weights 5 no phyfical difference can be found between two pounds of gold, or filver, let them be the produc¬ tion of the mines of Europe, Afia, Africa, or Ame¬ rica : they are perfe&ly malleable, fufible, and fuffer R r the M O N [ 3 ^oveY' the tnoft exact divifion which human art is capable to give them : they are capable of being mixed with one another, as well as with metals of a bafer, that is, of a lefs homogeneous nature, fuch as copper : by this mixture they fpread themfelves uniformly through the whole mafs of the compofed lump, fo that every atom of it becomes proportionally pofleiTed of a (hare of this noble mixture ; by which means the fubdi- vilion of the precious metals is rendered very exten- live. Their phyfical qualities are invariable : they lofe no¬ thing by keeping j they are folid and durable; and though their parts are feparated by friction, like every other thing, yet ftill they are of the number of thofe which fuffer leaf! by it. If money, therefore, can be made of any thing, that is, it the proportional value of things vendible can be meafured by any thing material, it may be meafured by the metals. II. The two metals being pitched upon as the mofl: proper fubftances for realizing the ideal fcale of money, thofe who undertake the operation of adjufting a ftand- ard, mull conftantly keep in their eye the nature and qualities of a fcale, as well as the principles upon w'hich it is formed. The unit of the fcale mufl: confiantly be the fame, although realized in the metals, or the whole operation fails in the moll eilential part. This realizing the unit is like adjuhing a pair of compaHes to a geometrical fcale, wdiere the fmalleft deviation from the exadt open¬ ing once given mufl; occafion an incorrefl meafure. The metals, therefore, are to money what a pair of compaffes is to a geometrical fcale. This operation of adjufting the metals to the money of account implies an exaft and determinate propor¬ tion of both metals to the money unit, realized in all the fpecies and denominations of coin, adjufted to that ftandard. The fmalleft particle of either metal added to, or taken away from, any coins, which reprefent certain determinate parts of the fcale, overturns the whole fyftem of material money. And if, notwithftanding fuch variation, thefe coins continue to bear the fame denominations as before, this will as effeflually de- ftroy their ufefulnefs in meafuring the value of things, as it would overturn the ufefulnefs of a pair of com- paftes, to (ufter the opening to vary, after it is adjuft¬ ed to the fcale reprefenting feet, toifes, miles, or leagues, by which the diftances upon the plan are to be mea¬ fured. III. Debafing the ftandard is a good term, be- caufe it conveys a clear and diftinft idea. It is dimi- niftiing the weight of the pure metal contained in that denomination by which a nation reckons, and which we have called x\\z money unit. Railing the ftand¬ ard requires no farther definition, being the dired con¬ trary. IV. Altering the ftandard (that is, railing or debaf¬ ing the value of the money unit) is like altering the national meafures or weights. This is beft difeovered by comparing the thing altered with things of the fame nature which have fuffered no alteration. Thus, if the foot of meafure was altered at once over all Eng¬ land, by adding to it, or taking from it, any propor- [4 ] MON tional part of its ftandard length, the alteration would Money be beft difeovered by comparing the new foot with ““""V” that of Paris, or of any other country, which had fuf¬ fered no alteration. Juft fo, if the pound fterling, which is the Englilh unit, ftiall be found anyhow changed, and if the variation it has met with be diffi¬ cult to afeertain becaufe of a complication of circum- ftances, the beft way to difeover it, will be to compare the former and the prefent value of it w:th the money of other nations which has fullered no variation. This the courfe of exchange will perform with the greatell exa&nefs. V. Artifts pretend, that the precious metals, when abfolutely pure from any mixture, are not of fufficient hardnefs to conftitute a folid and lafting coin. They are found alfo in the mines mixed with other metals of a bafer nature ; and the bringing them to a ftate of perfedt purity occafions an unneceflary expence. To avoid, therefore, the inconvenience of employing them in all their purity, people have adopted the expedient of mixing them with a determinate proportion of other metals, which hurts neither their fufibility, malleabi¬ lity, beauty, nor luftre. This metal is called &licy: and, being confidered only as a fupport to the princi¬ pal metal, is accounted of no value in itfelf. So that eleven ounces of gold, when mixed with one ounce of filver, acquires by that addition no augmentation of value whatever. 1 his being the cafe, we ftiall, as much as poffible, overlook the exiftence of alloy, in Ipeaking of money, in order to render language lefs fubjedlto ambiguity. 2. Incapacities of the Metals to perform the Ojficfof an invariable Meafure of Value. I. Were there but one fpecies of fuch a fubftance as wre have reprefented gold and filver to be ; were there but one metal pofleffing the qualities of purity, divifi- bility, and durability ; the inconveniences in the ufe of it for money would be fewer by far than they are found to be as matters ftand. Such a metal might then, by an unlimited divifion into parts exactly equal, be made to ferve as a toler¬ ably fteady and univerfal meafure. But the rivalfliip between the metals, and the perfeft equality which is found between all their phyfical qualities, fo far as regards purity and divifibility, render them fo equally well adapted to ferve as the common meafure of value, that they are univerfally admitted to pafs current as money. What is the confequence of this ? that the one mea- fures the value of the other, as well as that of every other thing. Now the moment any meafure begins to be meafured by another, whofe proportion to it is not phyfically, perpetually, and invariably the fame, all the ufefulnefs of fuch a meafure is loft. An example will make this plain. A foot of meafure is a determinate length. An Englifa foot may be compared with the Paris foot, or with that of the Rhine ; that is to fay, it may be mea¬ fured by them : and the proportion between their lengths may be exprefled in numbers, which pro¬ portion will be the fame perpetually. The meafur¬ ing the one by the other will occafion no uncertain¬ ty ; and we may fpeak of length by Paris feet, and be M O N Money, be perfectly well underftood by others who are ufed ■—V to meafure by the Englilh foot, or by the foot of the Rhine. But fuppofe that a youth of x 2 years old takes it into his head to meafure from time to time, as he ad¬ vances in age, by the length of his own foot, and that he divides this growing foot into inches and decimals: what can be learned from his account of meafures ? As he increafes in years, his foot, inches? and fubdivilions, will be gradually lengthening •, and were every man to follow his example, and meafure by his own foot, then the foot of a meafure now eftablillied would totally ceafe to be of any utility. This is juft the cafe with the two metals. There is no determinate invariable proportion between their va¬ lue ; and the confequence of this is, that when they are both taken for meafuring the value of other things, the things to be meafured, like lengths to be meafured by the young man’s foot, without changing their re¬ lative proportion between themfelves, change, however, with refpeft to the denominations of both their mea¬ fures. An example will make this plain. Let us fuppofe an ox to be worth 3000 pounds weight of wheat, and the one and the other to be worth an ounce of gold, and an ounce of gold to be worth ex¬ actly 15 ounces of fdver : if the cafe fliould happen, that the proportional value between gold and filver Ihould come to be as 14 is to 1, would not the ox, and confequently the wheat, be efiimated at lefs in filver, and more in gold, than formerly ? Farther, Would it be in the power of any ftate to prevent this variation in the meafure of the value of oxen and wheat, without putting into the unit of their money lefs filver and more gold than formerly ? If therefore any particular ftate fhould fix the ftand- ard of the unit of their money to one fpecies of the metals, while in faft both the one and the other are adlually employed in meafuring value ; does not fuch a ftate refemble the young man who meafures all by his growing foot ? For if filver, for example, be re¬ tained as the ftandard, while it is gaining upon gold one fifteenth additional value ; and if gold continue all the while to determine the value of things as well ss filver ; it is plain, that, to all intents and purpofes, tins filver meafure is lengthening daily like the young man’s foot, fince the fame weight of it muft become every day equivalent to more and more of the fame commodity , notwithftanding that we fuppofe the fame proportion to fubfift, without the leaft variation, between that commodity and every other fpecies of things alien¬ able. Buying and felling are purely conventional, and no man is obliged to give his merchandife at what may be fuppofed to be the proportion of its worth. The ufe, therefore, of an univerfal meafure, is to mark, not only the relative value of the things to which it is ap¬ plied as a meafure, but to difeover in an inftant the proportion between the value of thofe, and of every other commodity valued by a determinate meafure in all the countries of the world. Were pounds fterling, livres, florins, piaftres, &c. which are all money of account, invariable i» their values, what a facility would it produce in all con- Verfions ! what an afliftance to trade ! But as they are ,11 limited or fixed to coins, and confequently vary from M O N- time to time, this example Ihows the utility of the in- Money- variable meafure which we have deferibed. 'Tv There is another circumftance which incapacitates the metals from performing the office of money ; the fubftance of which the coin is made, is a commodity which rifes and finks in its value with refpe and the pound fterling, which is 4r of the guinea, contains 112.994, which we may date at 113 grains of fine gold. The coinage in England is entirely defrayed, at the expence of the ftate. The mint price for the metals is the very fame with the price of the coin. Whoever carries to the mint an ounce of ftandard filver, receives for it in filver coin 5s. 2d. or 62d.: whoever carries an ounce of (landard,gold receives in gold coin 3I. 17s. 1 o|d. the one and the other making exaftly an ounce of the fame finenefs with the bullion. Coin, therefore, can have MON [ 31 Money, have no value in the market above bullion j confe- ''““■’“■quently, no lofs can be incurred by thofe who melt it down. When the guinea was firft {truck, the government (not inclining to fix the pound fterling to the gold coin of the nation) fixed the guinea at 20 (hillings, (which was then below its proportion to the filver), leaving it to feek its own price above that value, ac¬ cording to the courfe of the market. By this regulation no harm was done to the Englifh filver itandard j becaufe the guinea, or 118.644 grains fine gold, being worth more, at that time, than 20 (hillings, or 1718.7 grains fine filver, no debtor would pay with gold at its ftandard value •, and whatever it was received for above that price was purely conven¬ tional. Accordingly guineas fought their own price until the year 1728, that they were fixed a-new, not below their value as at firft, but at what was then reckoned their exadt value, according to the proportion of the metals, viz. at 21 (hillings j and at this they were or¬ dered to pafs current in all payments. This operation had the effedl of making the gold a ftandard as well as the filver. Debtors then paid in¬ differently in gold as well as in filver, becaufe both were fuppofed to be of the fame intrinfic as well as current value j in which cafe no inconvenience could follow' upon this regulation. But in time filver came to be more demanded j the making of plate began to prevail more than formerly, and the exportation of fil¬ ver to the Eaft Indies increafing yearly, made the de¬ mand for it greater, or perhaps brought its quantity to be proportionally lefs than before. This changed the proportion of the metals j and by (low degrees they have come from that of I to 15.2 (the proportion they were fuppofed to have when the guineas were fixed and made a lawful money at 21 (hillings) to that of 14.5, the prefent fuppofed proportion. The confequencc of this has been, that the fame gui¬ nea which was worth 1804.6 grains fine filver, at the time it was fixed at 2is. is now worth no mere than 1719.9 grains of fine filver according to the proportion of 144 to 1. Confequently debtors, who have alw’ays the option of the legal fpecies in paying their debts, will pay pounds fterling no more in filver but in gold •, and as the gold pounds they pay in are not intrinfically worth the filver pounds they paid in formerly according to the fta- tute of Elizabeth, it follows that the pound fterling in filver is really no more the ftandard, fince nobody will pay at that rate, and fince nobody can be compel¬ led to do it. Befides this want of proportion between the metals, the filver coined before the reign of George I. is now become light by circulation j and the guineas coined by all the princes fince Charles II. pafs by tale, though many of them are confiderably diminifhed in their weight. Let us now examine what profit the want of propor¬ tion and the want of weight fn the coin can afford to the money-jobbers in melting it down or exporting it. Did every body confider coin only as the meafure for reckoning value, without attending to its value as a me¬ tal, the deviations of gold and filver coin from perfeft 8 ] MON exafrnefs, either as to proportion or-weight, would oc- Money, cafion little inconvenience. -—-y—- Great numbers, indeed, in every modern focietyr confider coin in no other light than that of money of account \ and have great difficulty to comprehend what difference any one can find between a light dulling and a heavy one, or what inconvenience there can poffibly refult from a guinea’s being fame grains of fine gold too light to be worth 21 (hillings ftandard weight. And did every one think in the fame way, there would be no occafion for coin of the precious metals at all ; lea¬ ther, copper, iron, or paper, would keep the reckon- *ng as well as gold and filver. But although there be many who look no farther than at the damp on the coin, there are others whofe foie bufinefs it is to examine its intrinfic w'orth as a commodity, and to profit of every irregularity in the weight and proportion of metals. By the very inftitution of coinage, it is implied, that every piece of the fame metal, and fame denomination with regard to the money-unit, (hall pafs current for the fame value. It is, therefore, the employment of money-jobbers, to examine, with a fcrupulous exa&nefs, the precife weight of every piece of coin which comes into their hands. The firft objeft of their attention is, the price of the. metals in the market: a jobber finds, at prefent, that with 14.5 pounds of fine filver bullion, he can buy one pound of fine gold bullion. He therefore buys up with gold coin all the new fil¬ ver as faft as it is coined, of which he can get at the. rate of 15.2 pounds for one in gold ; thefe 15.2 pounds filver coin he melts down into bullion, and converts that back into gold bullion, giving at the rate of only 14.5 pounds for one. By this operation he remains with the value of of one pound weight of filver bullion clear profit upon the 154 pounds he bought; which is really loft by the man who inadvertently coined filver at the mint, and gave it to the money-jobber for his gold. Thus the (late lofes the expence of the coinage, and the pub¬ lic the convenience of change for their guineas. But here it may be afleed, Why (hould the money- jobber melt down the filver coin ? can he not buy gold with it as well without melting it down ? He cannot ; becaufe when it is in coin he cannot avail himfelf of its being new and weighty. Coin goes by tale, not by weight j therefore, were he to come to market with his new filver coin, gold bullion being fold at the mint price, we (hall fuppofe, viz. at 3I. 17s. lO^d. fterling money per ounce, he w'ould be obliged to pay the price of what he bought with heavy money, which he can equally do with light. He therefore melts down the new filver coin, and fells it for bullion, at fo many pence an ounce ; the price of which bullion is, in the Englifti market, al¬ ways above the price of filver at the mint, for the rea- fons now to be given. When you fell ftandard filver bullion at the mint, you are to be paid in weighty money ; that is, you re¬ ceive for your bullion the very fame weight in ftand¬ ard coin ; the coinage cofts nothing : but when you fell bullion in the market, you are paid in worn-out filver, M O N Money, {liver, In gold, in bank notes, in ftiort, in every fye- -—y cies 0f lawful current money. Now all thefe pay¬ ments have fome defedl: the filver you are paid with is worn and light; the gold you aie paid with is over¬ rated, and perhaps alfo light ; and the bank notes muff have the fame value with the fpecie with which the bank pays them ; that is, with light frlver or over¬ rated gold. It is for thefe reafons, that filver bullion, which is bought by the mint at 5s. 2d. per ounce of heavy filver money, may be bought at market at 65 pence the ounce in light filver, overrated gold, or bank notes, which is the fame thing. Further, We have feen how the impofition of coin¬ age has the efteft of railing coin above the value of bullion, by adding a value to it which it had not as a 'metal. Juft fo, when the unit is once affixed to certain de¬ termined quantities of both metals, if one of the metals fnould afterwards rife in value in the market, the coin made of that metal mult lofe a part of its value as coin, although it retains it as a metal. Confequently, as in the firft cafe it acquired an additional value by being coined, it mutt now acquire an additional value by be¬ ing melted down. From this we may conclude, that when the Itandard is affixed to both the metals in the coin, and when the proportion of that value is not made to follow the price of the market, that fpecies which rifes in the market is melted down, and the bullion is fold for a price as much exceeding the mint price as the metal has rifen in its value. If, therefore, in England, the price of filver bullion is found to be at 65 pence the ounce, while at the mint it is rated at 62 ; this proves that filver has rifen ^T above the proportion obferved in the coin, and that all coin of ffandard weight may confequently be melted down with a profit of ^r. But as there are feveral other circumflances to be attended to which regulate and influence the price of bullion, we {hall here pafs them in review, the better to difcover the nature of this diforder in the Englifh coin, and the advantages which money-jobbers may draw’ from it. The price of bullion, like that of every other mer- chandife, is regulated by the value of the money it is paid with. If bullion, therefore, fells in England for 65 pence an ounce, paid in filver coin, it mull fell for 65 Ihillings the pound troy ; that is to fay, the (hillings it is com¬ monly paid with do not exceed the weight of of a pound troy : for if the 65 (hillings with which the pound of bullion is paid weighed more than a pound troy, it would be a (horter and better way for him who wants bullion to melt down the (hillings and make ufe of the metal, than to go to market with them in order to get lefs. We may, therefore, be very certain, that no man will buy filver bullion at 65 pence an ounce, with any (lulling which weighs above of a pound troy. We have gone upon the fuppofition that the ordi¬ nary price of bullion in the Englifh market is 65 pence per ounce. This has been done upon the authority of fome late writers on this fubjedf : it is now proper to point out the caufes which may make it deviate from that value.. MON I. It may, and certainly will vary, in the price, ac- Money, cording as the currency is better or w’or*e. When ^ the expence of a war, or a wrong balance of trade, have carried off a great many heavy guineas, it is natu¬ ral that bullion (hould rife ; becaufe then it will be paid for more commonly in light gold and filver ; that is to fay, with pounds fterling, below the value of 113 grains fine gold, the worth of the pound fterling in n^w guineas. II. This wrong balance of trade, or a demand for bullion abroad, becoming very great, may occafion a fcarcity of the metals in the market, as well as a fcarcity of the coin ; confequently, an advanced price muft be given for it in proportion to the greatnefs and height of the demand. In this cafe, both the fpecie and the bullion muft be bought with paper. But the rife in the price of bullion proceeds from the demand for the metals and the competition between merchants to procure them, and not becaufe the paper given as the price is at all of inferior value to the fpecie. The leaft diferedit of this kind would not tend to diminifh the value of tire paper ; it would annihilate it at once. Therefore, fince the metals muft be had, and that the paper cannot fupply the want of them when they are to be exported, the price rifes in proportion to the difficul¬ ties in finding metals elfewhere than in the Englifh market. III. A hidden call for bullion, for the making of plate. A goldfmith can well afford to give 67 pence for an ounce of fllver, that is to fay, he can afford to give one pound of gold for 14 pounds of filver, and per- haps for lefs, notwithftanding that what he gives be more than the ordinary proponion between the metals, becaufe he indemnifies himfelf amply by the price of his workmanfhip ; juft as a tavern keeper wall pay any price for a fine fiffi, becaufe, like the goldfmith, he buys for other people. IV. The mint price has as great an effect in bring¬ ing down the price of bullion, as exchange has in raif- ing it. In countries where the metals in the coin are juftly proportioned, where all the currencies are of le¬ gal weight, and where coinage is impofed, the opera¬ tions of trade make the price of bullion conftantly to flubluate between the value of the coin and the mint price of the metals. j Now let us fuppofe that the current price of filver bullion in the market is 65 pence the ounce, paid in lawful money, no matter of what weight or of what metal. Upon this the money-jobber falls to work. A1F {hillings which are above -gT of a pound troy, he throws- into his melting pot, and fells them as bullion for bjd. per ounce; all thofe which are below that weight he carries to market, and buys bullion with them at 65di per ounce. What is the confequence of this ? That thofe who fell the bullion, finding the (hillings which the money-jobber pays with perhaps n6t above ^g- of a pound troy, they on their fide raife the price of their bullion to 66d. the ounce. This makes new work for the money-jobber ; for he muft always gain. He now weighs all Ihillings as they come to hand ; and as formerly he threw into his melting pot thofe only which were worth more than -gV of a pound troy; he now throws in all that are in va- f 319 1 MON [ 3 Money, lue above -~s. He then fells the melted {hillings at 66d. the ounce, and buys bullion with the light ones at the fame price. This is the confequence of ever permitting any fpe- cses of coin to pafs by the authority of the {lamp, with¬ out controlling it at the fame time by the weight : and this is the manner in which money-jobbers gain by the currency of light money. It is no argument againft this expofition of the mat¬ ter to fay, that filver bullion is feldom bought with fil- ver com *, becaufe the pence in new guineas are worth no more than the pence of (hillings of 65 in the pound troy : that is to fay, that 240 pence contained in -Jx of a new guinea, and 240 pence contained in 28 (hil¬ lings of 65 to the pound troy, differ no more in the in- trinfic value than 0.83 of a grain of fine filver upon the whole, which is a mere trifle. Whenever, therefore, drillings come below the weight of ^5- of a pound troy, then there is an advan¬ tage in changing them for nerv guineas •, and when that 'is the cafe, the newr guineas will be melted dowm, and profit will be found in felling them for bullion, upon the principles we have juft been explaining. We h ave already given a fpecimen of the domeftic operations of the money-jobbers j but thefe are not the mod prejudicial to national concerns. The jobbers may be fuppofed to be Engliihmen j and in that cafe the profit they make remains at home : but whenever there is a call for bullion to pay the balance of trade, it is evident that this will be paid in filver coin 5 never in gold, if heavy filver can be got ; and this again carries away the filver coin, and renders it at home fo rare, that great inconveniences are found for want of the lef- (er denominations of it. The lofs, however, here is confined to an inconvenience ; becaufe the balance of trade being a debt which muft be paid, we do not con- fider the exportation of the filver for that purpofe as any confequence of the diforder of the coin. But be- fides this exportation which is neceffary, there are others which are arbitrary, and which are made only with a view to profit of the wrong proportion. When the money-jobbers find difficulty in carrying on the traffic we have defcribed, in the Englifti market, becaufe of the competition among themfelves, they carry the filver coin of the country, and fell it a- broad for gold, upon the fame principles that the Eaft India Company (end filver to China in order to pur- chafe gold. It may be demanded, What hurt this trade can do to Britain, fince thore who export filver bring back the fame value in gold ? Were this trade carried on by na¬ tives, there would be no lofs •, becaufe they would bring home gold for the whole intrinfic value of the filver. But if we fuppofe foreigners fending over gold to be coined at the Englifh mint, and changing the gold in¬ to Englifti filver coin, and then carrying off this coin, it is plain that they muft gain the difference, as wrell as the money-jobbers. But it may be anfwered, That having given gold for filver at the rate of the mint, they have given value for wfftat they have received. Very right j but fo did Sir Hans Sloane, when he paid five guineas for an overgrown toad : he got value for his money *, but it was value only to himfelf. Juft fo, whenever the Englilh government (hall be obliged to reftore the proportion of the metals (as they muft do), 3 20 1 MON this operation will annihilate that Imaginary Value which Money, they have hitherto fet upon gold ; which imagination is l'—y—■ the only thing which renders the exchange of their fil¬ ver againft the foreign gold equal. But it is farther objefted, that foreigners cannot carry off the heavy filver 5 becaufe there is none to carry off. Very true 5 but then they have carried off a great quantity already : or if the Englifti Jews have been too (harp to allow fuch a profit to fall to ftrangers, (which may or may not have been the cafe), then this diforder is an effeflual flop to any more coinage of fil¬ ver for circulation. 7. Of the Diforder in the Britifj Coin, fo far as it affeEls the Value of the Pound Sterling Currencij. From what has been faid, it is evident, that there muft be found in England two legal pounds fterling, of different values ; the one worth 113 grains of fine gold, the other worth 1718.7 grains of fine filver. We call them different : becaufe thefe two portions of the precious metals are of different values all over Eu¬ rope. But befides thefe two different pounds fterling, which the change in the proportion of the metals has created, the other defefts of the circulating coin produce fimilar effe£ls. The guineas coined by all the princes fince King Charles II. have been of the fame ftandard weight and finenefs, 444 in a pound troy of ftandard gold 41- fine : thefe have been conftantly wearing ever fince they have been coined ; and in proportion to their wearing they are of lefs value. If, therefore, the new guineas are below the value of a pound fterling in filver, ftandard weight, the old muft be of lefs value Kill. Here then is another cur¬ rency, that is, another pound fterling 5 or indeed, more properly fpeaking, there are as many different pounds fterling as there are guineas of different weights. This is not all $ the money-jobbers having carried off all the weighty filver, that which is worn with ufe, and redu¬ ced even below the ftandard of gold, forms one curren¬ cy more, and totally deftroys all determinate proportion between the money unit and the currencies which are fuppofed to reprelent it. It may be afked, bow, at this rate, any filver has remained in England ? It is anfwered, that the few weighty (hillings which ftill remain in circulation, have marvelloufly efcaped the hands of the money-jobbers : and as to the reft, the rubbing and wearing of thefe pieces has done what the (late might have done ; that is to fay, it has reduced them to their due proportion with the lighted gold. The diforder, therefore, of the Englifti coin has ren¬ dered the ftandard of a pound fterling quite uncertain. To fay that it is 1718.7 grains of fine filver, is quite ideal. Who are paid in fuch pounds ? To fay that it is 113 grains of pure gold, may alfo not be true $ be¬ caufe there are many currencies worfe than the new guineas. What then is the confequence of all this diforder ? What effeft has it upon the current value of a p*und fterling ? And which way can the value of that be de¬ termined ? The operations of trade bring value to an equation, notwithftar.ding the greateft irregularities poflible $ and fo MON [ 321 1 MON Honey. value over all the world by the means of foreign ex¬ change. This is a kind of ideal fcale for meafuring the Britilh coin, although it has not all the properties of that defcribed above. Exchange confiders the pound fterling as a value determined according to the combination of the va¬ lues of all the different currencies, in proportion as payments are made in the one or the other ; and as debtors generally take care to pay in the worft fpecies they can, it confequently follows, that the value of the pound fterling fhould fall to that of the loweft currency. Were there a fufficient quantity of worn gold and lilver to acquit all bills of exchange, the pound fterling would come down to the value of them} but if the new gold be alfo neceffary for that purpofe, the value of it muft be proportionally greater. All thefe combinations are liquidated and compen- fated with one another, by the operations of trade and exchanee ; and the pound fterling, which is fo different in itfelf, becomes thereby, in the eyes of commerce a de¬ terminate unit; fubjedl, however, to variations, from which it never can be exempted. Exchange, therefore, is one of the beft meafures for valuing a pound fterling, prefent currency. Here oc¬ curs a queftion : Does the great quantity of paper money in England tend to diminifh the value of the pound fterling ? We anfwer in the negative. Paper money is juft as good as gold or filver money, and no better. The va¬ riation of the ftandard, as we have already faid, muft influence the interefts of debtors and creditors propor¬ tionally everywhere. From this it follows, that all aug¬ mentation of the value of the money unit in the fpecie muft hurt the debtors in the paper money j and all diminutions, on the other hand, muft hurt the creditors in the paper money as well as everywhere elfe. The payments, therefore, made in paper money, never can contribute to the regulation of the ftandard of the pound fterling ; it is the fpecie received in liquidation of that paper money which alone can contribute to mark the value of the Britifh unit j becaufe it is affixed to nothing elfe. From this we may draw a principle, “ That in countries where the money unit is entirely affixed to the coin, the a£!ual value of it is not according to the legal ftandard of that coin, but according to the mean proportion of the aftual worth of thofe currencies in which debts are paid. From this we fee the reafon why the exchange be tween England and all other trading towns in Europe has long appeared fo unfavourable. People calculate the real par, upon the fuppofition that a pound fter¬ ling is worth 1718.7 grains troy of fine filver, when in fa6i the currency is not perhaps worth 1638, the va¬ lue of a new guinea in filver, at the market proportion of 1 to 14.5 ; that is to fay, the currency is but 95.3 per cent, of the filver ftandard of the 43d of Elizabeth. No wonder then if the exchange be thought unfavour¬ able. From the principle we have juft laid down, we may gather a confirmation of what we advanced concerning the caufe of the advanced price of bullion in the Englifh market. When people buv bullion with current money at a Vol. XIV. Part I. determinate price, that operation, in conjunflion with Money, the courfe of exchange, ought naturally to mark the atlual value of the pound fterling with great exaft- nefs. If therefore the price of ftandard bullion in the Eng¬ lifh market, when no demand is found for the exporta¬ tion of the metals, that is to , fay, when paper is found for paper upon exchange, and when merchants verf^d in thefe matters judge exchange (that is, re¬ mittances) to be at par, if then filver bullion can¬ not be bought at a lower price than 65 pence the ounce, it is evident that this bullion might be bought with 65 pence in fhillings, of which 65 might be coin¬ ed out of the pound troy Engliih ftandard filver ; fince 65 per ounce implies 65 (hillings for the 12 ounces or pound troy. This plainly (hows how ftandard filver bullion fhould fell for 65 pence the ounce, in a country where the ounce of ftandard filver in the coin is worth no more than 62 j and were the market price of bullion to ftand uniformly at 65 pence per ounce, that w'ould fliow the value of the pound fterling to be tolerably fixed. All the heavy filver coin is now carried off $ be¬ caufe it was intrinfically worth more than the gold it paffed for in currency. The filver therefore which re¬ mains is worn down to the market proportion of the metals, as has been faid ; that is to fay, 20 fhillings in filver currency are worth 113 grains of fine gold, at the proportion of 1 to 14.5 between gold and filver. Now, as 1 is to 14.5, fo is 113 to 1638 : fo the 20 fhillings current w’eigh but 1638 grains fine filver, inftead of 17x8.7, which they ought to do ac¬ cording to the ftandard. Now let us fpeak of ftandard filver, fince we are examining how far the Englifh coin muft be worn by ufe. The pound troy contains 5760 grains. This, ac¬ cording to the ftandard, is coined into 62 fhillings j confequently, every (hilling ought to weigh 92.9 grains. Of fuch (hillings it is impoffible that ever ftandard bullion fhould fell at above 62 pence per ounce. If therefore fuch bullion fells for 65 pence, the fhil¬ lings with which it is bought muft weigh no more than 88.64 grains ftandard filver : that is, they muff: lofe 4.29 grains, and are reduced to of a pound troy. But it is not neceffary that bullion be bought with fhillings : no ftipulation of price is ever made farther, than at fo many pence fterling per ounce. Does not this virtually determine the value of fuch currency with regard to all the currencies in Europe? Did a Spaniard, a Frenchman, or a Dutchman, know the exaft quantity of filver bullion which can be bought in the London market for a pound fterling, would he inform himfelf any farther as to the intrinfic value of that money unit ? would he not underftand the value of it far better from that civcumftance than by the courfe of any exchange, fince exchange does not mark the intiinfic value of money, but only the va¬ lue of that money tranfported from one place to ano¬ ther ? • The price of bullion, therefore, when it is not in¬ fluenced by extraordinary demand, (fuch as for the payment of a balance of trade, or for making an ex- S f traordinary Money. M ON [' 322 ] M traorcmary provifion of plate), but when it (lands at ment for a pound ide-rling ; what every body knows to be meant by the meant by the common marKet price, is a very tolerable raeafure of the value of the actual money (landard in any country. I) lt; he therefore true, that a pound (lerling cannot purenafe above 1638 grains of fine filver bullion, it will require not a little logic to prove that it is really, or has been for thefe many years, worth any more ; not with (landing that the (landard weight of it in "Eng¬ land is regulated by the laws of the kingdom at 1718.7 grains of fine filver. If to this valuation of the pound (lerling drawn from the price of bullion, we add the other drawn from the courfe of exchange •, and by this we find, that when paper is found for paper upon exchange, a pound ileiling cannot purchafe above 1638 grains of fine filver in any country m Europe: upon thefe two authorities we may very fafely conclude (as to the mat¬ ter of fact at lead) that the pound (lerling is not Avorth more, either in London or in any other trading city •, and if this be the cafe, it is juft worth 20 (hil¬ lings of 65 to the pound troy. Ir therefore the mint were to coin (hillings at that rate,, and pay for filver bullion at the market price, that is, at the rate of 65 pence per ounce in thofe new coined (hillings, they would be in proportion to the gold • (liver would be carried to the mint equally with gold, and would be as little fubjeft to be exported or melted down. It may be inquired in this place, how far the coining tne pound troy into 65 (hillings is contrary to the laws of England ? 1 he moment a (late pronounces a certain quantity ©f gold to be worth a certain quantity of filver, and orders thefe refpe&ive quantities of each metal to be received as equivalents of each other, and as lawful money in payments, that moment gold is made a ftand- ard as much as (liver. If therefore too fmall a quan¬ tity of gold be ordered or permitted to be confidered as an equivalent for the unit, the filver ftandard is from that moment debafed } or indeed, more properly fpeak- mg, all filver money is from that moment proferibed ; or who, from that time, will ever pay in (liver, when he can pay cheaper in gold ? Gold, therefore, by fuch a aw, is made the ftandard, and all declarations to the contrary are againft the matter of faft. Were the king, therefore, to coin filver at 65 (hil¬ lings m the pound, it is demonflration, that by fuch am j he would commit no adulteration upon the ftand- ?.rc! : the adulteration is already committed. The flandard has defeended to where it is by (low de¬ grees, and by the operation of political caufes only ; and nothing prevents it from falling lower bul the ftandard of the'gold coin. Let guineas be now left to leex their value as they did formerly, and let light iilver continue to go by tale, we (hall fee the guineas up at 30 (hillings in 20 years time, as was the cafe in J695. It is as abfurd to fay that the ftandard of Queen izabeth has not been debafed by enafting that the Enghfti unit (hall be acquitted with 113 grains of fine goid as it would be to affirm that it would not be de- baled from what it is at prefent by enafting that a pound of butter (hould everywhere be received in pay. O N although the pound fter- Money. ling (hould continue to confill of three ounces, 17 penny- ——v weights, and 10 grains of ftandard filver, according to the fiatute of the 43d of Elizabeth. In that cafe, moft debtors would pay in butter ; and filver would, as at prefent, acquire a conventional value as a metal, but would be looked upon no longer as a ftandard, or as money. If therefore, by the law of England, a pound fter- ling^ muft conlift of 1718.7 grains troy of fine filver 5 by tne law of England alio, 113 grains of gold mult be of the fame value : but no law can eftablifh that proportion j conlequently, in which ever ivay a refor¬ mation be brought about, Come law muft be reverfed j confequently, expediency, and not compliance with law, mufi be the motive in reforming the abufe. from what has been (aid, it is not at all furprifmg that the pound fterling fhould in faft be reduced near¬ ly to the value of the gold. Whether it ought to be kept at that value is another queftion. All that we here decide is, that coining the pound troy into 65 (hidings would reftore the proportion of the metals, and render both fpecies common in circulation. But reftoring the weight and proportion of the coin is not the difficulty which prevents a reformation of the Eng¬ lish coinage. 8. Circnmjlances to be attended S in a New Regulation of the Britijh Coin. To.people who do not underftand the nature of fuch operations, it may have an air of juftice to fuppoit the unit at what is commonly believed to be the ftand¬ ard of Queen Elizabeth, viz. at 1718.7 grains of fine filver. The regulating the ftandard of both filver and gold 4:o fi fine, and the pound fterling to four ounces ftandard (liver, as it flood during the reign of Queen Mary I. has alfo its advantages, as Mr Harris has ob- ferved. It makes the crown-piece to weigh juft one ounce, the (lulling four pennyweights, and the penny eight grains: confequently, were the new ftatute to bear, that the weight of the coin (hould regulate its currency upon certain occafions, the having the pieces adjufted to certain aliquot parts of weight would make weighing eafy, and would accuftom the common people to judge of the value of money by its weight, and not by the (lamp. In that cafe, there might be a conveniency in ftrik- ing the gold coins of the fame weight with the filver j becaufe the proportion of their values would then ccn- ftantly be the fame with the proportion of the metals. The gold crowns would be worth at prefent, 3]. 12s. 6d. the half-crowns il. 16s. 3d. the gold (hillings 14s. 6d. and the half 7s. 3d. I his was anciently the prac¬ tice in the Spaniffi mints. I he interefts within the (late can be nowife per- fedlly protefled, but by permitting converfions of value from the old to the new ftandard, whatever it be, and by regulating the footing, of (uch converfions by aCl of parliament, according to circumftances. For this purpofe, rve (hall examine thofe interefts which will chiefly merit the attention of governmer* when they form a regulation for the future of acquit! ting Money. MON [ 323 ] MO N ting permanent contrafls already entered into. Such as may be contra&ed afterwards will naturally follow the new ftandard. The landed intereft is no doubt tl# moft confider- able in the nation. Let us therefore examine, in the firlt place, what regulations it may be proper to make, in order to do juflice to this great clafs, with refpeCt to the land tax on one hand, and with refpeCt to their lef- fees on the other. The valuation of the lands of England was made many years ago, and reafonably ought to be fupported at the real value of the pound fterling at that time, according to the principles already laid down. The general valuation, therefore, of the whole kingdom will rife according to this fcheme. . This will be con- fidered as an injufticej and no doubt it would be fo, if for the future, the land tax be impofed as heretofore, without attending to this circumftance 5 but as that im- pofition is annual, as it is laid on by the landed intereif itfelf, who compofe the parliament, it is to be fuppofed that this great clafs will at lead take care of their own intereft. Were the valuation of the lands to be ftated accord¬ ing to the valuation of the pound fterling of 1718.7 grains of filver, which is commonly fuppofed to be the flandard of Elizabeth, there would be no great injury done : this would raife the valuation only 5 per cent, and the land tax in proportion. There is no clafs of inhabitants in all England fo much at their eafe, and fo free from taxes, as the clafs of farmers. By living in the country, and by confutn- ing the fruits of the earth without their fullering any alienation, they avoid the effef! of many excifes, which, by thofe who live in corporations, are felt upon many articles of their confumption, as well as on thofe which are immediately loaded with thefe impofitions. For this reafon it will not, perhaps, appear unreafon- able, if the additional 5 per cent, on the land tax were thrown upon this clafs, and not upon the land¬ lords. With refpeft to leafes, it may be obferved, that wm have gone upon the fuppofttion that the pound fterling in the year 1 728 wTas worth 1718.7 grains of fine filver, and 1x3 grains of fine gold. There would be no injuftice done the leflees of all the lands in the kingdom, were their rents to be fixed at the mean proportion of thefe values. We have obferved howr the pound fterling has been gradually diminiftiing in its worth from that time by the gradual rife of the filver. This mean proportion, therefore, will nearly anftver to w'hat the value of the pound fterling was in 1743 ; fuppofing the rife of the filver to have been uni¬ form. It may be farther alleged in favour of the landlords, that the gradual debafement of the ftandard has been more prejudicial to their intereft in letting their lands, than to the farmers in difpofing of the fruits of them. Proprietors cannot fo eafily raife their rents upon new leafes, as farmers can raife the prices of their grain according to the debafement of the value of the cur¬ rency. The pound fterling, thus regulated at the mean pro¬ portion of its worth, as it Hands at prefent, and as it flood in 1728, may be realized in 1678.6 grains of fine filver, and J 15.76 grains fine gold j which is 2.4 per cent, above the value of the prefent currency. No in¬ jury, therefore, would be done to leflees, and no un- reafonable gain would accrue to the landed intereft, in appointing converfions of all land rents at 24 per cent, above the value of the prefent currency. Without a thorough knowledge of every circumftance relating to Great Britain, it is impoflible to lay down any plan. It is fufficient here briefly to point out the principles upon which it muft be regulated. The next intereft to be confidered is that of the na¬ tion’s creditors. The right regulation of their concerns wall have a confiderable influence in eftablifhing public credit upon a folid bafis, by making it appear to all the wmrld, that no political operation upon the money of Great Britain can In any refpeft either benefit or pre¬ judice the intereft of thofe wTho lend their money upon the faith of the nation. The regulating alfo the inte¬ reft; of fo great a body, wall ferve as a rule for all cre¬ ditors w'ho are in the fame circumftances, and will upon other accounts be produftive of greater advantages to the nation in time coming. In 1749, a new regulation w’as made with the pub¬ lic creditors, when the intereft of the whole redeemable* national debt was reduced to 3 per cent. This cir¬ cumftance infinitely facilitates the matter with refpeft to this clafs, fince, by this innovation of all former con- tradls, the w'hole national debt may be confidered as contracted at, or pofterior to, the 25th December 1749. Were the ftate, by an arbitrary operation upon money (which every reformation muft be), to diminiih the value of the pound fterling in which the parlia¬ ment at that time bound the nation to acquit thofe capitals and the intereft upon them, would not all Eu¬ rope fay, That the Britifh parliament had defrauded their creditors ? If therefore the operation propofed to be performed fhould have a contrary tendency, viz. to augment the value of the pound fterling wdth which the parliament at that time bound the nation to ac¬ quit thsfe capitals and interefts, muft not all Europe alfo agree, That the Britifh parliament had defrauded the nation ? The convention with the ancient creditors of the ftate, who, in confequence of the debafement of the ftandard, might have juftly claimed an indemnification for the lofs upon their capitals, lent at a time when the pound fterling w'as at the value of the heavy fil¬ ver, removes all caufes of complaint from that quarter. There was in the year 1749 an innovation in all their contracts $ and they are n»w to be confidered as creditors only from the 25th of December of that year. Let the value of the pound fterling be inquired in¬ to during one year preceding and one pofterior to the tranfaftion of the month of December 1749. The great fums borrowed and paid back by the nation dur¬ ing that period, will furnifh data fufficient for that calculation. Let this value of the pound be fpecified in troy grains of fine filver and fine gold bullion, with¬ out mentioning any denomination of money according to the exact proportion of the metals at that time. And let this pound be called the pound of natio?ial credit. This firft operation being determined, let it be enact¬ ed, that the pound fterling, by which the ftate is to S f 2 borrow' Money. M ON [32 Money, borrow Tor the future, and that in which the creditors “-''v are to be paid, fhall be the exa& mean proporfon be¬ tween the quantities of gold and filver above fpecified, according to the aftual pronortion of the metals at the time fuch payments uiall be made : or that the fums (hall be borrowed or acquitted, one half in gold and one half in filver, at the refpedive requifitions of the creditors or of the Hate, when borrowing. All debts contradfed pofterior to 1749 may 'oe mads liable to converfions. The confequence of this regulation will be the infen- fible eflablifhment of a bank money. Nothing would he more difficult to eftabliih, by a pofitive revolution, than fuch an invariable meafure $ and nothing will be found fo eafy as to let it efttiblifti itfelf by its own ad¬ vantages. This bank money will be liable to much fewer inconveniencies than that of Amfterdam. There the perfons tranfadling muft be upon the fpct •, here, the fieriing currency may, every quarter of a year, be adjufiect by the exchequer to this invariable ftand- ard, for the benefit of all debtors and creditors who incline to profit of the liability of this meafure of va¬ lue. This fcheme is liable to no inconvenience from the variation of the metals, let them be ever fo fre¬ quent or hard to be determined •, becaufe upon every occafion where there is the fmalleft doubt as to the adlual proportion, the option competent to credi¬ tors to be paid half in filver and half in gold wull re¬ move. Such a regulation will alfo have this good effedl, that it will give the nation more juft ideas of the na¬ ture of money, and confequently of the influence it ought to have upon prices. If the value of the pound fterling ftrall be found to have been by accident lefs in December 1749 than it is at prefent ; or if at prefent the currency be found below wffiat it has commonly been fince 1749 5 ’n juftice to the creditors, and to prevent ail complaints, the nation may grant them the mean proportion of the value of the pound fterling from 1749 to 1760, or any other which may to parliament appear reafon- able. z This regulation muft appear equitable in the eyes of all Europe •, and the ftrongeft proof of it will be, that it will not produce the fmalleft effeft prejudicial to the intereft of the foreign creditors. The courfe of exchange wuth regard to them will fland precifely as before. A Dutch, French, or German creditor, will receive the fame value for his intereft in the Englifti flocks as heretofore. This muft filence all-clamours at home, being the moft convincing proof, that the new regu¬ lation of the coin will have made no alteration upon the real value of any man’s property, let him be debtor cr creditor. The intereft of every other denomination of credi¬ tors, whofe contrails are of a frefh date, may be regu¬ lated upon the fame principles. But where debts are of an old Handing, juftice demands, that attention be had to the value of money at the time of contrailing. Nothing but the liability of the Englifti coin, when compared with that of other nations, can make fuch a propofal appear extraordinary. Nothing is better known in France than this ftipulation added to obli- 4 1 MON gations, Argent cm cours de ce jour; that is to fay, That the fum (hall be repaid in coin ot the fame, inuinfic ‘ value with what has been lent. YY by fhould luch a claule be thought reafonabie for guarding people againft arbitrary operations upon the numerary value of the coin, and not be found juft upon every occafion where the numerary value of it is found to be changed, let the caufe be wffiat it will ? The next intereft we lhall examine is that of trade. When men have attained the age of 21, they have no more occafion for guardians. This may be applied to traders; they can parry with their pen every inconve¬ nience which may refult to other people from the changes upon money, provided only the laws permit them to do themfelves juftice with refpedft to their en¬ gagements. This clais demands no more than a right to convert all reciprocal obligations into denominations of coin of the fame intrinfic value with thofe they have Mdnev. contra&ed in. The next intereft is that of buyers and fellers ; that is, of manufacturers with regard to confumers, and of fervants with refpeft to thole who hire their perfonal fervice. The intereft of this clafs requires a moft particular attention. They muft, literally fpeaking, be put to fchool, and taught the firft principles of their trade, which is buying and felling. They muft learn to judge of price by the grains of filver and gold they receive : they are children of a mercantile mother, however war¬ like the father’s difpofition. If it be the intereft of the Hate that their bodies be rendered robuft and aClive, it is no lefs the intereft of the ftate that their minds be inftrufted in the firft principles of the trade they exer- cife. For this purpofe, tables of converfion from the old ftandard to the new muft be made, and ordered to be put up in every market, in every Ihop. All duties, all excifes, muft be converted in the fame manner. Uni¬ formity muft be made to appear everywhere. The fmalleft deviation from this will be a Humbling block to the multitude. Not only the intereft of the individuals of the clafs we are at prefent confidering, demands the nation’s care and attention in this particular ; but the profpe- rity of trade, and the w7ellbeing of the nation, are alfo deeply interefted in the execution. The whole delicacy of the intricate combinations of commerce depends upon a juft and equable vibration of prices, according as circumftances demand it. The more, therefore, the induftrious claffes are inftrufted in the principles which influence prices, the more eafily will the machine move. A workman then learns to fink his price without regret, and can raife it without avidity. When principles are not underftood, prices cannot gently fall, they muft be pulled down; and mer¬ chants dare not fuffer them to rife, for fear of abufe* even although the perfedlion of an infant manufacture fnould require it. The laft intereft is that of the bank of England, which naturally muft regulate that of every other. Had this great company follow^ed the example of other banks, and eftablifhed a bank-money of an inva¬ riable ftandard as the meafure of all their debts, and credits, they would not have been liable to any incon¬ venience upon a variation of the ftandard. The MON [ 325 ] MON Money. The bank of England was proje£led about the year —-Y—- 1694, at a ^me when the current money of the nation was in the greateft diforder, and government in the greateft didrefs both for money and for credit. Com¬ merce was then at a very low ebb ; and the only, or at lead the mod profitable, trade of any, was jobbing in coin, and carrying backwards and forwards the pre¬ cious metals from Holland to England. Merchants profited alfo greatly from the effe£ls which the utter diforder of the coin produced upon the price of mer- chandife. At fuch a juncture the refolution was taken to fnake a new coinage ■, and upon the profpedt of this, a com¬ pany was found, who, for an exclufive charter to hold a bank for 13 years, willingly lent the government upwards of a million derling at 8 per cent (in light money we fuppofe), with a profpedt of being repaid both intered and capital in heavy. This was not all : part of the money lent was to be applied for the eda- blidiment of the bank j and no lefs than 40C0I. a-year was allowed to the company, above the full intered, for defraying the charge of the management Under fuch circumdances the introdudion of bank- money was very fuperfluous, and would have been very impolitic. That invention is calculated againd the raifing of the dandard : but here the bank profited of that rife in its quality of creditor for money lent; and took care not to commence debtor by circulating their paper until the effect of the new regulation took place in 1695 ; that is, after the general re-coinage of ail the clipped filver. From that time till norv, the bank of England has been the balls of the nation’s credit, and with great reafon has been condantly under the mod intimate pro- teflion of every minider. The value of the pound derling, as we have feen, has been declining ever fince the year 1601, the dandard being fixed to filver during all that century, while the gold wTas condantly riling. No fooner had the pro¬ portion taken another turn, and filver begun to rife, than the government of England threw the dandard virtually upon the gold, by regulating the value of the guineas at the exadl proportion of the market. By thefe operations, however, the bank has condantly been a gainer (in its quality of debtor) upon all the paper in circulation ; and therefore has lod nothing by not having edablilbed a bank-money. The intered of this great company being edablifhed upon the principles wTe have endeavoured to explain, it is very evident, that jhe government of England never will take any dep in the reformation of the coin which in its confequences can prove hurtful to the bank. Such a dep would be contrary both to judice and to common Jenfe. To make a regulation which, by raif¬ ing the dandard, would prove beneficial to the public creditors, to the prejudice of the bank (which we may call the public debtor), would be an operation upon public credit like that of a perfon who is at great pains to fupport his houfe by props on all fides, and who at the fame time blows up the foundation of it with gun¬ powder. We may therefore conclude, that with regard to the bank of England, as well as every other private bank¬ er, the notes which are condantly payable upon de¬ mand mud be paade liable to a converfion at the a£!ual value of the pound derling at the time of the new re¬ gulation. That the bank will gain by this, is very certain; but the circulation of their notes is fo fwift, that it would be abfurd to allow to the then poflelfors of them that indemnification w’hich naturally fhould be diared by all thofe through whofe hands they have pafled, in pro¬ portion to the debafement of the dandard during the time of their refpedlive pofieflion. Befides thefe confiderations, which are in common to all dates, the government of Great Britain has one pe- fculiar to itfelf. The intered of the bank, and that of the creditors, are diametrically oppofite : every thing which raifes the dandard hurts the bank ; every thing w’hich can fink it hurts the creditors: and upon the right management of the one and the other, depends the folidity of public credit. For thefe reafbns, with¬ out the mod certain profpeft of conducing a reditution of the dandard to the general advantage as well as ap¬ probation of the nation, no minider will probably ever undertake fo dangerous an operation. We (hall now propofe an expedient which may re¬ move at lead fome of the inconveniences which would, refult from fo extenfive an undertaking as that of regu¬ lating the refpe£Hve intereds in Great Britain by a po- fitive law, upon a change in the value of their money of account. Suppofe then, that, before any change is made in the coin, government fliould enter into a tranfa&iqn with the public creditors, . * d afeertain a permanent value for the pound derling for the future, fpecified in a de¬ termined proportion of the fine metals in common bul¬ lion, without any regard to money of account, or to any coin whatever. This preliminary dep being taken, let the intended alteration of the dandar.d be proclaimed a certain time before it is to commence. Let the nature of the change be clearly explained, and let all fuch as are en-* gaged in, contra&s which are diffolvable at will upon the predations dipulated, be acquitted between the parties, or innovated as they (hall think proper ; with certification, that, poderior to a certain day, the di- pulations formerly entered into fhalLbe binding accord¬ ing to the denomiviations of the money of" account in the new dandard. As to permanent contrafb, which cannot at bnce be fulfilled and diflblved, fuch as lealies, the parliament may either preferibe the methods and terms of conver¬ fion or a liberty may be given to the parties to annul the contra6l, upon the 'debtor’s refufing to perform bis agreement according to the new dandard. Contrails, on the other hand, might remain dable, with refpeft to creditors w’ho would be fatisfied with payments made on the footing of the old dandard. If the rife intended (hould not be very confiderable, no great injudice can follow fuch a regulation. Annuities are now thoroughly .underdood, and the value of them is brought to fo nice a calculation, that nothing will be eafier than to regulate thefe upon the footing of the value paid for them, or of the fubjeft affefled by them. If by the regulation, land rents are made to rife in denomination, the an¬ nuities charged upon them ought to rife in propor¬ tion ; if in intrinfic value, the annuity diguld remain as it was. 9. Regulation} . MON "Money. 9. ’Regulations which the Principles of this Inquiry point out as expedient to be made by a new Statute for regu¬ lating the Britijh Coin. Let us now examine what regulations it may be proper to make by a new ftatute concerning the coin of Great Britain, in order to preferve always the fame exafl; value of the pound fterling realized in gold and in filver, in fpite of all the.incapacities inherent in the metals to perform the fun&ions of an invariable fcale or meafure of value. r. The firft point is to determine the exaft number of grains of fine gold and fine filver which are to com- pofe it, according to the then proportion of the metals in the London market. 2. To determine the proportion of thefe metals with the pound troy ; and in regard that the'ftandard of gold and filver is different, let the mint price of both metals be regulated according to the pound troy fine. 3. To fix the mint price within certain limits ; that is to fay, to leave to the king and council, by pro¬ clamation, to carry the mint price of bullion up to the value of the coin, as is the prefent regulation, or to fink it to per cent, below that price, according as government fhall incline to impofe a duty upon coinage. 4. To order, that filver and gold coin {ball be (truck of fuch denominations as the king fhall think fit to ap¬ point j in which the proportion of the metals above determined fhall be conftantly obferved through every denomination of the coin, until neceflity (hall make a new general coinage unavoidable. 5. To have the number of grains of the fine metal in every piece marked upon the exergue, or upon the legend of the coin, in place of fome initial letters of titles, which not one perfon in a thoufand can decy¬ pher ; and to make the coin of as compact a form as poffible, diminifhing the furface of it as much as is confident with beauty. 6. That it (hall be lawful for all contra&ing parties .to fiipulate their payments either in gold or filver coin, or to leave the option of the fpecies to one of the parties. 7. That where no particular flipuhtion is made, creditors (hall have power to demand payment, half in one fpecies, half in the other; and when the fum can¬ not fall equally into gold and filver coins, the fraclions to be paid in filver. 8. That in buying and felling, when no particular fpecies has been ftipnlated, and when no aft in writing has intervened, the option of the fpecies (hall be com¬ petent to the buyer. 9. That all fums paid or received by the king’s re¬ ceivers, or by bankers, (hall be delivered by weight, if demanded. 10. That all money which (hall be found under the legal weight, from whatever caufe it may pjoceed, may be rejefted in every payment whatfoever*, or if offered in payment of a debt above a certain fum, mi', be taken according to its weight, at the then mint price, in the option of the creditor. 11. That no penalty (hall be incurred by thofe who melt down or export the nation’s coin ; but that walk¬ ing, clipping, or diminifhing the weight of any part [ 326 ] MON of it (hall be deemed felony, as much as any other theft, if the perfon fo degrading the coin (hall after- U wards make it circulate for lawful money. 7 o prevent the inconveniencies proceeding from the variation in the proportion between the metals, it may be provided, 12. That upon every variation of proportion in the market price of the metals, the price of both (hall be changed, according to the following rule : Let the price of the pound troy fine gold in the coin be called G. Let the price of ditto in the filver be called S. Let the new proportion between the market price of the metals be called P. Then (fate this formula: G S ^p+—=to a pound troy fine filver, in fterling currency. pound troy fine gold, in fieri, currency. This wull be a rule for the mint to keep the price of the metals conftantly at par with the price of the market j and coinage may be impofed, as has been defcribed, by fixing the mint price of them at a certain rate belowT the value of the fine metals in the coin. 13. As long as the variation of the market-price of the metals fhall not carry the price of the rifing metal fo high as the advanced price of the coin above the bullion, no alteration need be made on the denomina¬ tion of either fpecies. 14. So foon as the variation of the market price of the metals (hall give a value to the rifing fjiecies, above the difference between the coin and the bullion 5 then the king (hall alter the denominations of all the coin, filver and gold, adding to the coins of the rifing metal exaftly what is taken from thofe of the other. An ex¬ ample will make this plain : Let us fuppofe that the coinage has been made ac¬ cording to the proportion of 14.5 to 1 ; that 20 (hil¬ lings, or 4 crown-pieces, (hall contain, in fine filver, 14.5 times as many grains as the guinea, or the gold pound, (hall contain grains of fine' gold. Let the new proportion of the metals be fuppofed to be 14 to 1. In that cafe, the' 20 (hillings, or the 4 crowns, wrill contain Ay more value than the guinea. Now fince there is no queftion of making a new' general coinage upon every variation, in order to adjuft the propor¬ tion of the metals in the weight of the coins, that pro¬ portion might be adjufted by changing their refpedive denominations according to this formula : Let the 20 (hillings, or 4 crowns, in coin, be called S. Let the guinea be called G. Let the difference between the old proportion and the new, which is Aw be called P. Then fay. P p S~~ =a pound fterling, and G-f-——a pound fieri. By this it appears that all the filver coin niuft be raifed in its denomination and all the gold coin mull be lowered in its denomination ^ > yet (till S+G will be equal to two pounds fterling, as before, whe¬ ther they be confidered according'to the old or ac¬ cording to the new denominations. But it may be obferved, that the impofition of coin¬ age rendering the value of the coin greater than the value I M ON [ 327 ] MON •’vToney. value of the bullion, that circumftance gives a certain latitude in fixing the new denominations of the coin, fo as to avoid minute fractions. For, providing the deviation irom the exaft proportion fhall fall within the advanced price of the coin, no advantage can be taken by melting down one fpecies preferably to ano¬ ther ; fince, in either cafe, the lofs incurred by melting the coin nauft be greater than the profit made upon felling the bullion. The mint price of the metals, however, may be fixed exactly, that is, within the value . of a farthing upon a pound of fine filver or gold. This is eafily reckoned at the mint; although upon every piece in common circulation the fractions of farthings would be inconvenient. 15. That notwithftanding of the temporary varia¬ tions made upon the denomination of the gold and filver coins, all contrails formerly entered into, and all ftipulations in pounds, (hillings, and pence, may con¬ tinue to be acquitted accoiding to the old denomina¬ tions of the coins, paying one-half in gold and one- half in fiJver : unlefs in the cafe where a particular Ipecies has been ftipulated ; in which cafe, the fums muil be paid according to the new regulation made upon the denomination of that fpecies, to the end that neither profit or lofs may refult to any of the parties. 16. That notwithftanding the alterations @n the mint price of the metals, and in the denomination of the coins, no change ftiall be made upon the weight of the particular pieces of the latter, except in the cafe of a general re-coinage of one denomination at lead : that is to fay, the mint muft not coin new gui¬ neas, crowns, &c. of a different weight from thqfe al¬ ready in currency, although by fo doing the fradlions might be avoided. This would occafien confufion, and the remedy would ceafe to be of any ufe upon a new change in the proportion of the metals. But it may be found convenient, for removing the fmall frac¬ tions in {hillings and lixpences, to recoin fuch deno¬ minations altogether, and to put them to their in¬ teger numbers of twelve and of fix pence, without changing in any refpeft their proportion of value to all other denominations of the coin : this will be no great expence, when the bulk of the filver coin is put into 5 {hilling pieces. By this method of changing the denominations of the coin, there never can refult any alteration in the value of the pound fterling ; and although fraflions of value may now and then be introduced, in order to prevent the abufes to which the coin would othemlfe Money, be expofed by the artifice of thofe who melt it down, — yet ftill the inconvenience of fuch fra£lions may be avoided in paying, according to the old denomina¬ tions, in both fpecies, by equal parts. This will alfo prove demonilratively, that no change is there¬ by made in the true value of the national unit of money. 17. That it be ordered, that (hillings and fixpences {hall only be current for 20 years j and all other coins, both gold and filver, for 40 years, or mere. For af- certaining which term, there may be marked, upon the exergue of the coin, the laft year of their cur¬ rency, in place of the date of their fabrication. This term elapfed, or the date effaced, that they {hall have no more currency whatfoever j and, when offered ii* payment, may be received as bullion at the actual price of the mint, or refufed, at the option of the cre¬ ditor. iS. That no foreign coin ftnall have any/^a/cur¬ rency, except as bullion at the mint price. By thele and the like regulations may be pre¬ vented, imo, The melting or exporting of the coin in general. 2(fo, The melting or exporting one fpecies, in order to fell it as bullion at an advanced price. pio, The profit in acquitting obligations preferably in one fpecies to another. 4(0, The degradation of the ftandard, by the wearing of the coin, or by a change in the proportion oetween the metals. 5/0, The circu¬ lation of the coin below the legal weight. 6ta, The profit that other nations reap by paying their debts; more cheaply to Great Britain than Great Britain can pay her’s to them. And the great advantage of it is, that it is an uni¬ form plan, and may ferve as a perpetual regulation, compatible with all kinds of denominations of coins, variations in the proportion of the metals, and with the impofition of a duty upon coinage, or with the pre- ferving it free ; and further, that it may in time be adopted by other nations, who will find the advantage of having their money of account preferved perpetually at the fame value, with refpedl to the denominations o£ all foreign money of account eftablilhed on the fame principles. But for a fuller difeuflion of this fubje£t we muft: refer cur readers to Mr Wheatley’s Effay on the Theory of Money and Principles of Commerce. London 1807 ; and to a Treatife on the Coins of the Realm, in a letter to the king, by the Earl of Liver¬ pool, London 1805. A TABLE M O Dutcli Coins. German Coins. r-'-n N French Coins, '-T 0\’-n ^ >>>>> n S 0 d S > > d o QO'J -fi. CO !>>!>£>>> d 2 02 S ’ ^ 5. ° o ££ r .i s-,r c o dpp 2 f* t?1 ^ s d d n p: M P 2! < O *-s "i ^ 5. ^ ■5! Srro c. ^ rs g O, a, ’ o ^ O ►-d d 2- S ^ ^ S co ?• o . ^ *0 w >> n d o o i: 32S 1 Englifh Coins. OJ i3 m. 5 'O OO'J OSCn 40 Co d O o co d o &P. ^ O 2? C r- c —.2 o >T,,-r'0 " — 5 M O N § 5' = p . Cl. ^ ^ d CO O § g, D- 3‘ Hr-j^ d H 3 m! d? 2 d. O ^ ^ ^ n a o' ^ p d a. s 2 " o 3 " I’S a- 2* K> • 2,4^ s0 3 CD Q, S d; d s* ^ /-h 3 c -td ^ d d C O 3 c era « co co ^ co p E ^ > > n o 3 3. O w 3" cr ^ vs ^ 55 ^ &3 5 c H > bd lr< W O o S5 O'. w -§ ko o o rr. w 3 f? rs o d O'! ^ >—< m d * _j 12 r0Q 0^ era ^ era <- o ^ “ P , o s O < 4^ Oj H VO o 3 40. IO ET n C N 0[H_. cr' o Cr1 <■■, 3 3 ^ 3 CO p (D w 3 d - 5-§ ^ CO O ora o era 3^ 3T CS n o 3 5 -3 n C3 3 o a-X era § cr 2 ^ 2. 3‘»d CO ^ d n o|» Cn]0 a5 H cr vs p 3 GO - £° O O S d n-. p W -• ^ D 3 O Q- ^ ?=' £- ^ s" ^ ?? 5 HI 2. ora" p cr o 3’ - < I I 4* K|H G^i Vi ^ -p». 00 Vl GO GO CO C\ o or, OO GO VI -K 0\ VO I _ I 3 N> ] 0\4>- O CO o 00 CO Co VO 4^ o VO id 4^ 4^ Co 0 -p- d vb 3 on 00 00 3 4^ C^ OV GO -U vp 'j 00 4* 4-* 3 Gr. 3 00 d Go w 4^ 4i. GO p CO p\ 3 GO bo ON+i C\ bo 4^ 4^ I ! —T ' -.1 3 ON .3 *3 00 w 4- Go 3 VO o\ 4I vb is = I I I U »l I I M 3 3 3 Go OGo I Gn Cn p ra to or, 3 bo , GO G.1 3 as o -h Gn ffi 4g OO Os ^1 4- to 3 vi VO vp G^i ~~0 VO Go CO O Go O Co 00 00 do CO Go 3 VI ov to 4C COGo Ov O O G,J VO 0C4* VO bevi go vc vb VI VI 3 ; ~~ OWO K) 4^- O VO 004^ VO 00 OvGo vc VO •~_j 00 Ov—1 C3V Ov to O COVI 3 Go Go O 4* m 00 cc co vo 4i. O vo Cv vt Gn Go OV 00 vr 4- 3 OC M OC Gr, vp vi vb bv Co 00 Gn to M IO to 3 3 to 03 OOVOVO O-Cr, VO vO VO 4^- VC VO VO vooto Grt GD 4- Cm Gr, cv G04-OJ MOvbow’dj^ ’ cv u d VO p\ bo Co to K) 3 Ovvt 3 VO 4^ 3 Go VO to 4* OC 00 004^ VO 3 Gn to OO Ov 3 to d — dj 4^ Cn to to to to 3 — 0 3 O O VO VO CO OO VO GO 00 CIO OO to 4k. VO bO O Go -|J- O 3 Gr, OO O bo 0 4-0 00 00 to OO'J '~i GO to Ov4i. 4- Co vh 4- Os O o to Gr, tO 3 bO 3 — VO Vt Gr, Cv~p to pi 4- <0 4g 4g 3 G» to to 10 to to to to Goo 4. 3 to GM to bo to 4- M Ov to - 3 Ov O O vp -p Vri p\ 4* Gao bovb 3 V| to to GM 3 Gr, tJ 3 OO Ov p 3 to O X 4- Os VI OV GrJ >-a Gr, VO ffi c CD n Crq C d < s* o- S w a. c Ov C* 4— O-vo 5 b OV ora o n 3 2- =r o m' p’ 5 rj O p ’-a -• O 3 vr, f-4^ c’ W Hf tr (T) 3 3 3 cr* ora 2 •d ^ £. o o “ ora 3- 3 3 ^ 3 S' 3, co o _ 3o 3 P H ^ > W r* ^ ^rj ri) o o H-* • Sj 3 Pd- 3T CD 3 2 S • • re to cr UNIVERSAL EUROPE, Northern Parts. E 329 ] UNIVERSAL TABLE Of the prefent State of the Real and Imaginary Moneys of the World". f This mark is prefixed to the Imaginary Money, or Money of Account. All Fractions in the Value Englifh are Parts of a Penny. — This mark fignifies is, make, or equal to. A Farthing 2 Farthings 2 Halfpence 4 Pence 6 Pence 12 Pence 5 Shillings 20 Shillings 21 Shillings ENGLAND and SCOTLAND. London, Brijlol, Liverpool, A Fening - - o O 4 Fenings a Cruitzer - 00 3 Cruitzers a Keyler Grolli - 00 4 Cruitzers a Batzen - 00 15 Cruitzers an Ort Gould - 00 16 Cruitzers a Gould - o 2 90 Cruitzers fa Rixdollar - 0 3 2 Goulds a Hard Dollar - 048 '24c Cruitzers a Ducat - 094 POLAND and PRUSSIA. Cracow, Warfaw, b?c. Danisic, Koningsberg, b'c. A Shelon - . 000 3 Shelons zz a Grofh 5 Grofhen a Couftic 3 Couflics a Tinfe o o o o o o 24 MON POLAND, &c. 18 Grofhen ~ 30 Grofhen 90 Grofhen 8 Florins 5 Rixdollars an Ort a Florin fa Rixdollar a Ducat a Frederic d’Or o o O I ° 3 o 9 o 17 d. 8f. 2 6 4 6 LIVONIA. Biga, Revel, Narva, b'c. A Blacken - - 00 6 Blackens — a Grofh - 00 9 Blackens a Vording - 00 2 GrolLen a Whiten - 00 6 Grofhen a Marc - 00 30 Groflien a Florin - 01 90 Grofhen fa Rixdollar - 0 3 108 Groflien an Albertus - 04 64 Whitens a Copperplate Dollar c 5 °TT Oto of-f r 1 2 2 6 2-V Zi s DENMARK, ZEALAND, and NORWAY. Copenhagen, Sound, b'c. Bergen, Drontlmm, rh'c. A Skilling - - 00 O-j^j 6 Skillings — a Duggen - o o 3-g- 16 Skillings fa Marc - 009 20 Skillings a Rixmarc - o o 24 Skillings a Rixort - o 1 i-§ 4 Marcs a Crown - 030 6 Marcs a Rixdollar - 046 11 Marcs a Ducat - 083 14 Marcs a Hatt Ducat - o 10 6 SWEDEN and LAPLAND. Stockholm, Upfal, L'c. Thorn, Ac. f A Runftick - - 00 2 Runfticks = a Stiver - 00 8 Runflicks a Copper Marc o o 3 Copper Marcs a Silver Marc - 00 4 Copper Marcs a Copper Dollar o o 9 Copper Marcs a Caroline - 01 3 Copper Dollars a Silver Dollar - 01 3 Silver Dollars a Rixdollar - 0 4 2 Rixdollars a Ducat - 0 9 °T^ °tV 44 6f- 2 6t 8 4 RUSSIA and MUSCOVY. Peterjburg, Archangel, Ac. Mofcow, Ac. A Polufca - - 00 2 Polufcas r; a Denufca - 00 2 Denufcas fa Copec - 00 3 Copecs an Altin - 00 10 Copecs a Grievener - 00 25 Copecs a Polpotin - 01 5c Copecs a Poltin - 02 100 Copecs a Ruble - 0 4 2 Rubles a Xervonitz - 09 n * 7 °Too' O——— w i o o n 2 7 0To lU Sr i4 3 6 BASIL. Zurich, Zug, Ac. A Rap - - 000 3 Rapen = a Fening - o o O-^ 4 Fenings a Cruitzer - o o of 12 Fenings fa Sol - o o if 15 Fenings-, 'TT 4 EUROPE, Southern Parts. France and Navarre. Switzerland. 15 Fenings 18 Fenings 20 Sols 60 Cruitzers 108 Cruitzers M O N BASIL, &c. = a Coarfe Batzen a Good Batzen f a Livre a Gulden a Rixdollar, C 331 1 £■ O O O o o A Denier 4 Deniers 3 Cruitzers 4 Cruitzers 5 Cruitzers 6 Cruitzers 20 Sols 75 Cruitzers 135 Cruitzers BERN. Lucern, Neufchatel, °x. it if 2 2f O 6 6 °TT of of 4f 3 nf 1 of o Cambray, Valenciennes, itfc. A Denier - - 00 12 Deniers =r a Sol - 00 15 Deniers fa Patard - 00 15 Patards fa Piette - 00 20 Sols a Livre Tournois o o 20 Patards fa Florin - 01 60 Sols an Ecu of Ex. o 2 1 of Livres a Ducat - ° 9 24 Livres a Louis d’Or 1 o o/t Of Of 9t 10 of 6 3 o Dunkirk, St Omers, St Quintin, is'c. A Denier - - 00 12 Deniers a Sol - 00 15 Deniers fa Patard o o 15 Sols fa Piette o o 20 Sols fa Li-vre Tournois o o 3 Livres an Ecu of E^ o 2 24 Livres a Louis d’Or 1 o 254 Livres a Guinea - 1 1 32f Livres a Moeda - 17 U2-T of of 7f 10 6 o o o 'M O N Paris, Lyons, Marfei/les, is'c. Bourdeaux, Bayonne, is'c. A Denier 3 Deniers 2 Liards 12 Deniers 20 Sols 60 Sols 6 Livres 10 Livres 24 Livres a Liard a Dardene a Sol fa Livre Tournois an Ecu of Ex. an Ecu fa Piftole a Louis d’Or £• o o o o o o o o I d. Ott Of Of Of 10 6 o 4 o PORTUGAL. Lifbon, Oporto, fa'c. f A Re 10 Rez 20 Rez 5 Vintins 4 Teftoons 24 Vintins 10 Teftoons 48 Teftoons 64 Teftoons o o a Half Vintin o o a Vintin O o a Teftoon - 00 a Crufade of Ex. o 2 a New Crufade o 2 fa Milre - 05 a Moeda - 1 7 a Joanefe - 1 16 O 17 °Too off 6f 3 7f o o Madrid, Cadiz, Seville, is’c. New Plate. A Maravedie - - o a Quartil, - o a Rial - o a Piftarine o fa Piaftre of Ex. o a Dollar - o fa Ducat of Ex. o fa Piftole of Ex. o a Piftole - o 2 Maravedies 34 Maravedies 2 Rials 8 Rials 10 Rials 375 Maravedies 3 2 Rials 36 Rials o o o o 3 4 4 14 16 OfVv OtVs 5t 10 7 6 nf 4 9 Gibraltar, Malaga, Denia, is'c. Velon. f A Maravedie 2 Maravedies 4 Maravedies 34 Maravedies 15 Rials 512 Maravedies 60 Rials 2048 Maravedies 78 Rials — an Ochavo fa Quartil fa. Rial Velon a Piaftre of Ex. fa Piaftre fa Piftole of Ex. a Piftole of Ex. a Piftole 3 3 14 16 16 OtVt Barcelona, Saragojfa, Valencia, isr'c. Old Plate. A Maravedie - - o ka Soldo - o a Rial Old Plate o fa Libra - a fa Ducat - o fa Dollar - o fa Ducat - o fa Ducat - o a Piftole - o 16 Maravedies =2: 2 Soldos 20 Soldos 24 Soldos 16 Soldos 22 Soldos 21 Soldos 60 Soldos o o o 5 6 4 6 5 16 0fVf 3f 6f 7f 9 6 2f lof 9 GENOA. AW/, &3V. A Denari CORSICA. Bajlia, is’c. 1 2 Denari 4 Soldi 20 Soldi 30 Soldi a Soldi a Chevalet fa Lire a Teftoon X t 2 O ^! (JTW5- n 5*' 5 °To^ Iff 8f 5 Lires Southern Parts, W Ch O Mi/an, Modena, Parma, Pavia, T5"& 6’ O °To 74- 3 6 6 o o o CHINA. Pekin, Canton, isc. A Caxa 10 Caxa ; 10 Candereens 35 Candereens 2 Rupees 70 Candereens 7 Maces 2 Rupees to Maces a Candereen a Mace a Rupee a Dollar a Rixdollar an Ecu a Crown fa Tale o o o o o o o o o JAPAN. Jeddo, Meaco, is'e. A Plti 20 Pitis = 15 Maces 20 Maces 30 Maces 13 Ounces Silver 2 Ounces Gold 2 Japanefes a Mace an Ounce Silver a Tale an Ingot an Ounce Gold a Japanefe a Double O Of o 4 4 10-r 6 8 2r Ounces Gold fa Cattee 9 3 3 6 6 12 12 66 3 u t—I Pd EGYPT. 0/V and New Cairo, Alexandria, Sayde, is’e. An Afper 3 Afpers : 24 Medins 80 Afpers 30 Medins 96 Afpers 32 Medins 200 Afpers 70 Medins a Medin an Italian Ducat fa Piaftre a Dollar a Ecu a Crown a Sultanin a Fargo Dollar o 10 o 10 °4- 1t 4 o 6 o o o o BARBARY. Algiers, Tunis, Tripoli, Una, is'e. 10 An Afper Afpers Afpers 2 Rials 4 Doubles 24 Medins 30 Medins 180 Afpers 15 Doubles a Medin a Rial old Plate a Double a Dollar a Silver Chequin a Dollar a Zequin a Pi dole o o O I o ‘ 6 1 1 4 6 3 4 4 6 8 10 016 9 MOROCCO. A Fluce 24 FIuqcs Santa Crux, Mcquiruz,, Fec, Sallee, is’e. — a Blanquin Tangier s^, O O Cxbr 0 0 2 4 Blanquils West-Indies. <3 o •—t fit <1 4 Blanquils 7 Blanquils 14 Blanquils 2 Q^uartos 28 Blanquils 54 Blanquils 100 Blanquils MON MOROCCO, &c. — an Ounce an Oflavo a (Quarto a Medio a Dollar a Xequin a Piftole r ENGLISH. Jamaica, Barbadoes, ani/b, Portuguefe, Dutch, and Danifh Dominions, either on the Continent or in the Weft Indies, fee the Moneys of the refpe&ive nations. Ancient Monux. See Coins and Medals. Paper Monet. See the article Bank. MONK anciently denoted, “ a perfon who retired from the world to give himfelf up wholly to God, and to live in folitude and abftinence.” The word is de¬ rived from the Latin monachus, and that from the Greek “ folitary j” of pwos^folus, “ alone.” The origin of monks leems to have been this : The perfecutions which attended the firft ages of the Gofpel forced fome Chriftians to retire from the w7orld, and live in deferts and places moft private and unfrequented, in hopes of finding that peace and comfort among beafts which were denied them among them. And this being the cafe of fome very extraordinary perfons, their example gave fo much reputation to retirement, that the practice was continued when the reafon of its com¬ mencement ceafed. After the empire became Chriftian, inftances of this kind were numerous j and thofe whofe fecurity had obliged them to live feparately and apart, became afterwards united into focieties. We may alfo add, that the myftic theology, w?hich gained ground towards the clofe of the third century, contributed to produce the fame effect, and to drive men into folitude for the purpofes of enthufiaftic devotion. J he monks, at leaft the ancient ones, were diftin- guifhed into folitaries, ccenobites, and farabaites. The folitary are thofe who live alone, in places- re- aiote from all towns and habitations of men, as do ftill 4 fome of the hermits. The ccenobites are thofe who live in community with feveral others in the fame houfe, and under the fame fuperiors. The farabaites were ftrolling monks, having no fixed rule or refidence. The houfes of monks again w'ere of two kinds, viz. monq/leries and laurce. See Monastery and Laura. Thofe we call monks now-a days are ccenobites, who live together in a convent or monaftery, who make vows of living according to a certain rule eftabliftied by the founder, and wear a habit which diftinguifties their order. T hofe that are endowed, or have a fixed revenue, are moft properly called monks, tnonachi; as the Chartreux, Benediftines, Bernardines, &c. The Mendicants, or thofe that beg, as the Capuchins and Francifcans, are more properly called religious and friars ; though the names are frequently confounded. The firft monks were thofe of St Anthony; who, to¬ wards the cloie of the fourth century, formed them into a regular body, engaged them to live in fociety wdth each other, and prefcribed to them fixed rules for the direaion of their conduft, Thefe regulations, which Anthony had made in Egypt, were foon introduced into Paleltine and Syria by his difciple Hilarion. Almoft about the fame tirpe, Aones or Eygenius, with their companions Gaddanas and Azyzas, inftituted the mo- naftic order in Mefopotamia and the adjacent countries ; and their examplejwas followed with fuch rapid luccefs, that MON [ 335 .1 .that in a fhort time the whole eaft was filled with a lazy in the year fet of mortals, who, abandoning all human connexions, advantages, pleafures, and concerns, wore out a lan- guiihing and miferable life amidft the hardflnps of want, and various kinds of fulfering, in order to arrive at a more clofe and rapturous communication with God and angels. _ From the eaft this gloomy inftitution palled into the weft, and firft into Italy and its neighbouring iflands ; though it is uncertain who tranfplanted it thither. St Martin, the celebrated biftiop of Tours, erefted the firft mcnafteries in Gaul, and recommended this religi¬ ous folitude with fuch power and efficacy, both by his inftru&ions and his example, that his funeral is faid to have been attended by no lefs than 2000 monks. Fiom hence the monaftic difcipline extended gradually its pro- grefs though the other provinces and countries of Europe. There W'ere befides the monks of St Bafil (called in the Eaft Calogeri, fromxaAs? ysgwv, “good old man”) and thofe of St Jerome, the hermits of St Au- guftine, and afterwards thofe of St Benedict and St Bernard 5 at length came thofe of St Francis and St Dominic, with a legion of others j all which fee under their proper heads, Benedictines, &c. Towards the clofe of the 5th century, the monks, who had formerly lived only for themfelves in folitary retreats, and had never thought of affuming any rank among the facerdotal order, were now gradually di- ftinguiffied from the populace, and endowed with luch opulence and honourable privileges that they found themfelves in a condition to claim an eminent ftation among the fupports and pillars of the Chriftian com¬ munity. The fame of their piety and famftity was fo great, that bifliops and prefoyters wTere often chofen out of their order; and the paffion of ereTing edifices and convents, in which the monks and holy virgins might ferve God in the moft commodious manner, w7as at this time carried beyond all bounds. How'ever their licentioufnefs, even in this century, was become a pro¬ verb 5 and they are faid to have excited the moft dreadful tumults and feditions in various places. The monaftic orders were at firft under the immediate jurif- di&ion of the biffiops, from which they were exempted by the Roman pontiff about the end of the 7th century j and the monks, in return, devoted themfelves wholly to advance the interefts and to maintain the dignity of the biftiop of Rome. This immunity which they ob¬ tained was a fruitful fource of licentioufnefs and diforder, and occafioned the greateft part of the vices with which they were afterwards fo juftly charged. In the 8th century the monaftic difcipline was extremely relaxed both in the eaftern and w^eftern provinces, and all efforts to reftore it were ineffeflual. Neverthelefs, this kind of inftitution was in the higheft efteem, and no¬ thing could equal the veneration that was paid about the clofe of the 9th century to fuch as ’devoted them¬ felves to the facred gloom and indolence of a convent. This veneration induced feveral kings and emperors to call them to their courts, and to employ them jn civil affairs of the greateft moment. Their reformation was attempted by Louis the Meek, but the effedl was of ffiort duration. In the I ith century they were exempt¬ ed by the popes from the authority of their fovereigns, and new orders of monks were continually eftabliftied j infemuch that in the council of Lateran that was held MON I215, a decree was paffed, by the advice of Innocent III. to prevent any new monaftic inftitu- tions; and feveral were entirely fuppreffed. In the 1 5th and 16th cenuries, it appears, from the teftimonies of the beft writers, that the monks were generally lazy, illiterate, profligate, and licentious epicures, whole views in life w7ere confined to opulence, idlenefs, and pleafure. However, the Reformation'had a manifeft influence in reftraining their exceffes, and rendering them more circumfpett and cautious in their external conduft. Monks are diftinguilhed by the colour of their ha¬ bits into black, white, graij, &c. Among the monks, fome are called monks of the choir, others profejfed monks, and others lay monks ; which laft are dellined for the fervice of the convent, and have neither clericate nor literature. Cloijlered Monks, are thofe who actually refide in the houfe : in oppolition to ^/rr?-monks, who have benefices depending on the monaftery. Monks are alfo diftinguilhed into reformed, whom the civil and ecclefiaftical authority have made mailers of ancient convents, and put in their power to retrieve the ancient difcipline, which had been relaxed ; and ancient, who remain in the convent, to live in it ac¬ cording to its eftablilhment at the time when they made their vows, without obliging themlelves to any new r'eform. ,, Anciently the monks were all laymen, and were only diftinguifhed from the reft of the people by a particular habit and an extraordinary devotion. Not only the monks were prohibited the priefthood, but even pnefts were exprefsly prohibited from becoming monks, as ap¬ pears from the letters of St Gregory. Pope Syricius was the firft who called them to the clericate, on oc- cafion of fome great fcarcity of priefts, that the church was then fuppoled to labour under: and fince tiiat time, the priefthood has been ufually united to the monaftical profeffion. Monk, George, a perfonage memorable for having been the principal agent in reftoring Charles II. to his crow7n, w7as defcended from a very ancient family, and born in Devonftiire in 1608. Being an unprovided younger fon, he dedicated himfelf to arms from his youth, and obtained a pair of colours in the expedition to the Ifle of Rhee : he ferved afterwards in the Low Countries wfith reputation, in both King Charles’s nor¬ thern expeditions ; and did fuch fervice in quelling the Iriffi rebellion, that he was appointed governor of Dublin, but was fuperfeded by parliamentary authority. Being made major-general of the Irilh brigade employ¬ ed in the fiege of Nantwich in Chelhire, he was taken prifoner by Sir Thomas Fairfax, and remained confined in the Tourer of London until the year 1646 ; when, as the means of obtaining liberty, he took the covenant, and accepted a command in the Irifh fervice under the parliament. He obtained the command in chief of all the parliamentary forces in the north of Ireland, where he did fignal fervices, until he was called to account for a treaty made wflth the Iriffi rebels; a circumftance wfliich was only obliterated by fiis future good fortune. He ferved in Scotland under Oliver CromwHl with fuch fuccefs, that he was left there as commander in chief-, and he was one of the commiffioners for uniting that kingdom with the new erected commonwealth.,. He Monk. MON Monk He ferved at fea. alfo againft the Dutch ; and was trea- •MonJomh ted OH return> Oliver is faid to have ^ t- 'grown jealous of him. He was, however, again fent to Scotland as commander in chief, and continued there five years: when he diffembled fo well, and improved circumftances fo dexteroufly, that he aided the defires of a wearied peoole, and reitored the king without any difturbance : for which he was immediately rewarded both with honours and profit : (See Britain, N° 194, &c.)—He was created duke of Albemarle, with a grant of ^ocol. per annum eltate, befide other emo¬ luments ; and enjoyed the confidence of his mailer without forfeiting that of the people. After his death in 1670, there was published a treatife compofed by him while he remained prifoner in the l ower, en¬ titled, “ Obfervations on Military and Political Af¬ fairs,” a fmall folio. Monk Fifh. See Squalus, Ichthyology Index. Monk's Head, or Wolf's bane. See Aconitum, Bo¬ tany Index. MONKEY. See Simia, Mammalia Index. MONMOUTH, James, Duke of, fon to Charles II. by Mrs Lucy Walters, was born at Rotterdam in 1649. Upon the Relloration, he w’as called over to England, wEere the king received him with all ima¬ ginable joy, created him earl of Orkney (which w^as changed into that of Monmouth), and he took his feat in the houfe of peers in the enfuing felfion of parliament. He married Anne, the heirefs of Francis earl of Buc- cleugh and hence it came to pafs that he had alfo the title of Buccleugh, and took the furname of Scot, ac¬ cording to the cuftom of Scotland. In 166S his father made him captain of his life-guard of horfe ; and in 1672 he attended the French king in the Netherlands, and gave proofs of bravery and condufl. In 1673 the king of France made him lieutenant-general of his army, wdth which he came before Maeftricht, and be¬ haved himfelf with incredible gallantry, being the firlt who entered it himfelf. He returned to England, was received with all poflible refpedl, and wras received chancellor of the univerfity of Cambridge. After this he went to aflift the prince of Orange to raife the fiege of Mons, and did not a little contribute towards it. He returned to England 5 and was fent in quality of his father’s general, to quell an infurre&ion in Scot¬ land, whch he effefted •, but foon after he fell into difgrace; for, being a Protefiant, he w’as deluded into ambitious fchemes, upon the hopes of the exclufion of the duke of York : he confpired againft his father and the duke and wdien the latter came to the throne by the title of James II. he openly appeared in arms, en¬ couraged by the Proteftant army ; but coming to a de- cifive battle before he had fufficient fcices to oppofe the royal army, he was defeated, taken foon after concealed in a ditch, tried for high treafon, condemned, and be¬ headed in 1685, aged 36. See Britain, N° 242, 249 —265. Monmouth, the capital of the county of Mon- mouthlhire in England, 129 miles from London. It has its name from its fituation at the conflux of the Monow or Mynwy, and the Wye, over each of which it has a bridge, and a third over the Frothy. Here was a cable in William the Conqueror’s time, which Henry III. took from John baron of Mon- jniouth. It afterwards came to the houfe of Lan- r 336 1 MON cafter, who bellowed many privileges upon the town. Here Henry V. furnamed of Monmouth, was born. 1 he famous hiftorian Geoffrey was alfo born at this place. Formerly it gave the title of ear/ to the fa¬ mily of Carey, and of duke to King Charles the Se¬ cond’s eldeft natural fon ; but now of earl to the Mordaunts, who are alfo earls of Peterborough. It is a populous and well-built place, and carries on a confiderable trade with Briftol by means of the Wye. It has a weekly market, and three fairs. Monmouthshire, a county of England; anciently- reckoned a part of Wales, but in Charles II.’s time ta¬ ken into the Oxford circuit, and made an Englilh coun¬ ty. It is bounded on the north by Herefordlhire, on the eaft by Gloucefterlhire, on the fouth by the river Severn, and on the weft by the Wellh counties of Brecknock and Glamorgan. Its extent from north to fouth is about 30 miles, from eaft to weft 26, and in circumference no. It is fubdivided into fix hundreds, and 127 parilhes. In 1801, this county contained 8948 houfes, and 9903 families. The whole popula¬ tion amounted to 45,582 perfons. It fends only three members to parliament, that is, one for Monmouth, and two for the county. The air is temperate and healthy j and the foil fruitful, though mountainous and woody. The hills feed (beep, goats, and horned cattle ; and the valleys produce plenty of grafs and corn. This county is extremely well watered by feveral fine rivers 5 for, befides the Wye, which parts it from Gloucefterfliire, the Mynow, which runs between it and Herefordlhire, and the Rumney, which divides it from Glamorgan- fhire, it has, peculiar to itfelf, the Ulk, which enters this county a little above Abergavenny, runs moftly fouthward, and falls into the Severn by the mouth of the Ebwith ; which laft river runs from north to fouth, in the weftern fide of the county. All thefe rivers, ef- pecially the Wye and Ufk, abound with fifh, particu¬ larly falmon and trout. MONOCEROS, Unicorn, in AJlronomy, a fouth- ern conftellation formed by Hevelius, containing in his catalogue 19 (tars, and in the Britannic Catalogue 31, Monoceros. See Monodon, Cetology Index. MONOCHORD J an inftrument by which the fe¬ veral proportions of mufical founds and intervals, as well in the natural as in tempered fcales arc tried. Originally it had, as its name implies, only one ftringj but it is better conftrufted with two ; for, by means of this additional firing, we have an opportunity of judg¬ ing of the harmony of two tempered notes in every pof- fible variety of temperament. The reader who may wifh for further information re- fpe&ing the conftruftion and ufe of monochords, may confult the appendix to Mr Atwood’s Treatife on Rec¬ tilinear Motion, and Mr Jones’s obfervations on the fcale of mufic, monochord, &c. in his Phyfiological Difquifitions. Monochord is alfo ufed for any mufical inftru- ment that confifts of only one firing or chord ; in this fenfe the trumpet marine may properly be called a mo¬ nochord. MONOCULUS, a genus of.infedfs of the order of aptera. See Entomology Index. MONODON, a genus of filhes belonging to the or¬ der of cete. See Cetology Index. MONODY, in ancient poetry, a mournful kind of fong, Monmouth- (hire I! Monody. MON r 357 1 Mo N Mbnceda fong, fung by a petfon all alone, to give vent to his M ^ , grief. The word is derived from |t4«yas*, “ alone,” and fites. y" “ 1 fing-” u—y- MONOECIA, from uwo;, alone, and e where lie Hncl ^ie of twm very extraordinary twin monfters, who. eviden¬ ced during their life a great difference in their moral and phyfical qualities. We are obliged fimply to re¬ fer to thefe Memoirs, as they are too long for abridge- ment. . It is obferved by Haller, that in fome monfters tne natural ftrudlure is changed by fome ftiock or paflion.. in others the ftrudlure, independent of any -accident is originally monftrous •, fuch as when all the members are reverfed from left to right, when the perfon has fix fingers, and in many other.inftances.. M. de Mau- pertuis mentions, that there is at Berlin a family who have had fix fingers on each hand for feve.ral genera¬ tions. Mi. de Riville faw an inftance of tms at ivfalta, of which he has given a defcription. M. .Renou, fur- geon at Pommeraye in Anjou, has publiftied an ac¬ count of fome families with fix fingers, wnich are to be found in feveral parifhes of the Lower Anjou, and which have exifted there from time immemorial. This deformity is perpetuated in tnefe families even when, they intermarry wfith perfons wftio are free from it. Whether the propagation of thefe fupernume.rary or¬ gans, w’hich are not only ufelefs but inconvenient and even difagreeable, be owing to the father or mother, their; children of both fexes are fubjeft. to it indifcri- minately. A father or mother with fix fingers fre¬ quently have a part, and fometimes the whole,, of their children, free from this deformity ; but it again makes its appearance, and in a very great degree, in the third generation. From this it appears, that this fault m the conformatioh is hereditary. M. Reaumur has like¬ wife publithed the hiftory of a family in the ifland of Malta, the children of wftiich are born wfith fix^fingeis and fix toes. But it deferves to be inquired, Whether thefe fupernumerary fingers are real fingers ? ihe rea¬ der may here confult the 'journal de Physique for No¬ vember 1774, p. 37 2. This variety oifexdigitary hands and feet is not comprehended in the Recherches fur quelqites conformations monjlrueufes des doigts dans Phomme, which is inferted in the Memoirs of the A.ca- demy of Sciences for 177 1. In the journal de Physique for-Auguft 1776, w7e find a defcription of a double ute¬ rus and vagina obferved in a wmman who died in child¬ bed, by Dr Purcell cf Dublin ; and in that for June *78.85 Monftcr. er M O N [ 342 1 MON 1788, we Lave an account of a man with feven fingers on each hand, by Baron Dietrich. Several raonfirous produftions are to be feen in the cabinet at Chantilly. 1. T wo calves joined together in the body, with each a feparate head and neck, and four legs in whole. 2. Two calves united only by the pelvis, with only one anus and one tail : the whole is fupported by fix legs, four before and two behind. 3. A lamb with fix legs, four of which are behind. 4. The Ikelcton of a ram, which has likewife fix legs. 5. A he rmaphrodite deer. 6. The head of a foal, which has only one eye in the middle of the forehead. 7. Some leverets with fix and eight legs. 8. A puppy, the lips of which are divided fourfold. 9. Some fce- tufes of a hog which have a kind of tube upon their forehead one or two inches long ; and another, the hinder part of which is double in every thing. 10. Two double human foetufes joined by the belly, with four fnns and three legs. 11. A young chicken with two bodies and one head. 12. A pigeon and a duck, each with two bills. 13. A duck with two heads. 14. A pigeon until four feet. 15. A capon with three feet; the third being fixed to the anus. 16. Two heads of ft calf joined together, each of them with two ears : the'e two fields were both fixed to cne neck. 17. In the Menagerie at Chantilly there was formeily to be feen a cow with five feet, the fifth of which was con- nefled with the dug. 18, A rabbit without ears. 19. Two cats, each having two heads. 20. Two leve¬ rets newly brought forth, well fhaped in the body and •legs, but connecled together by means of only one head. 21. Several eggs, in the figure of which there occur fome monftrous appearances and extraordinary deformities, fufficient to fliow that they are contrary to to the eftablilhed form of nature. Mr Home, furgeon, fome time ago prefented to Mr John Hunter, the double Jkull of a child, born at Cal- • cutta in May 1783 of poor parents aged 30 and 35, and 'which lived to be nearly two years old. The body of this child was naturally formed : but the head had the phenomenon of appearing double; another head of the fame fize, and almoft equally perfeft, be¬ ing attached to its upper part. In this extraneous and preternatural head no pulfation could be felt in the ar¬ teries of the temples, but the fuperficial veins were very evident; one of the eyes had been hurt by the fire, upon which the midwife, in her firlt alarm, threw the child: the other moved readily; but the iris was not affecled by the approach of any thing to it. The ex¬ ternal ears of this head were very imperfeft ; the tongue adhered to the lower jaw, except for about half an inch at the lip, which was loofe ; the j3w was ca¬ pable of motion, but there were no teeth. The child was fhown about the ftreets of Calcutta for a curiofity ; but was rendered unhealthy by confinement, and died at laft of a bite of the cobra de capelin. It was dug up by the Eaft India Company’s agent for fait at I umlock, and the Ikull is now in the mufeum of Mr Hunter. . Among the monfirous produ&ions of the animal kingdom, we may rank thole individuals which ought only to pofiefs one fex, but in which we obferve the union or the appearance of two. See the articles Av- i*ROGYM:s and Hermaphrodite. M. Fabri arranges mutilations of the members, dif- 3\ tortions, gibbofities, tumors, divifions of the lips or Monfter. of the palate, comprefiions of the cranium, and many other deformities of this kind, in the dais of morbific monftruolities. In that which he calls connatural (connaturelle) monftruofities, are placed the plurality, tranfpofition, and infertion of the parts. To explain thefe faffs, a great many writers have had recourie to the effefl of the imagination of pregnant women I he caules of the firft clafs of monllruofities are dif- culled by M. Fabri, who obferves, that fome of them, are internal with regard to the mother, and others ex¬ ternal. By an internal caufe he here means all thofe depravations or morbific principles which can afiefl the fluids, and which vitiate the form and ftruffure of the folids; in particular the uterus, in which fuch de¬ pravations have often been found to occur. To thefe he adds violent affeclions of the mind, fpafmodic con- traflions, hyfteric convulfions, and the many inconve¬ niences of this kind to which women are'extremelv fubjecf. External caufes comprehend every thing which can act externally upon the foetus contained in the uterus, fuch as the prefiure of the clothes ; and in fiicrt every thine which prevents the free dilatation of the belly in wmnen that are pregnant, violent mo¬ tions, falls, blows, and all accidents of this kind. Thefe external caufes, and efpecially the firfl, comprefs the foetus in the womb, and oblige it to remain in a very- confined fituation. This according to the obfervation of Hipocrates, produces thole embryos which are born with fome entire part wounded. M. Fabri maintains, that all deformities of the foetus proceed, from fome me¬ chanical and accidental caufes. The name of monjlers is likewife given to animals enormous for bulk ; fuch as the elephant among ter- reftrial quadrupeds, and the fhark and the whale among fea animals; to other animals remarkable for fiercenefs and cruelty ; and to animals of an extraordi¬ nary fpecies, which, we are told, arifes from the copulation of one animal with another of a different genus. According to the report of travellers, Africa abounds with monfters of this kind ; and accounts of the Faff are full of defcriptions of fea monfters, which, however are feldom to be feen, fuch as fea men, mer¬ maids, <&'c. Monfters are more common and more extraordinary in the vegetable than in the animal kingdom, becaufe the different juices are more eafily deranged and con¬ founded together. Leaves are often feen, from the in¬ ternal parts of which other leaves fpring forth, and it is not uncommon to fee flowers of the ranunculus from the middle of which iffues a ftalk bearing another flowen M. Bonnet informs us, that in certain warm and rainy years he has frequently met with monfters or this kind in rofe trees. This obferver faw a rofe, from the centre of which iffued a fquare ftalk of a whitilh colour, tender, and without prickles, which at its top bore two flower buds oppofite to each other, and totally deflitute of a calyx ; a little above the buds iflued a petal of a very irregular fliape. Upon the prickly ftalk which fupported the rofe, a leaf was obferved which had the fliape or a trefoil, together with a broad flat pedicle. In the memoirs of the Academy of Sciences for 1707, p. 448, mention is made of a rcfe, from the centra of the leaves of which iffued a rofe branch two or three inches long, and furnilhed with MON [ 343 ] MON J.ionfler with leaves. See the fame Memoirs For 1749, p. 44. II and for 1724, p. 20. In the Memoirs for 1775, a Montague. yery fingu]ar inftance is mentioned of a monftruoiity ~ observed by M. Duhamel, in an apple tree ingrafted with clay. At the place of the infertioa, there ap¬ peared a bud which produced a ftalk and fome leaves ; the ftalk and the pedicle of the leaves were of a pulpy fubftance, and had the moft pcrfeft refemblance both in tafte and fmell to the pulp of a green apple. An extraordinary chamcemelum is mentioned in the Acia Helvetica. M. Bonnet, in his Recherches fur Rufagc dec feuilles, mentions likewife fome monftrous produc¬ tions which have been found in fruits with kernels, analogous in their nature to thofe which occur in the flowers of the ranunculus and of the rofe tree. He has feen a pear, from the eye of which iffued a tuft of 13 or 14 leaves, very w ell ftiaped, and many of them of the natural fize. He has feen-another pear which gave rife to a ligneous and knotty ftalk, on which grew another pear fomewhat larger than the firft.— The ftalk had probably flouriihed, and the fruit had formed. The lilium album po/yanthos, obferved fome years ago at Breflaw, which bore on its top a bundle of flowers, conftfting of 102 lilies all of the common fhape, is well known. M. Reynier has mentioned fome indivieiuals monftrous with refpect to the flower, in the Journal de Physique et /Plliftoire Naturelle, for November 1785. He has likewife .mentioned a mon¬ ftrous tulip which is feen in the gardens of fome ama¬ teurs ; juniper berries with horns ; a balfamine with three fpurs, &c. Thefe vegetable produdlions which are fo extra¬ ordinary, and fo contrary to the common courfe of things, do neverthelefs prefent deviations fubjedf to particular laws, and reducible to certain principles, by diftinguiftiing fuch as are perpetuated either by feed or by tranfplanting, from thofe which feem to be only accidental. Monftruoflties which are perpetuated exift in the original organization of the leed of the plant, fuch as marked or curled leaves, &c. The word moti- fer is more properly applied to thofe irregularities in plants, which arife from frequent tranfplantation, and from a particular culture, fuch as double flowers, Sic. : but thofe monflruofities which are not perpetuated, and which arife from accidental and traniient caufes deran¬ ging the primitive organization of the plant when it comes to be unfolded, as is the eflfecl of difeafes, of heat or cold, of a fuperfluity or fcarcity of juiceK, of a de¬ pravation of the veffels contributing to nutrition, of the fting of infefts, of contuflons and natural grafts, retain alfo the name of monfers. Of this kind are knobs or fwellings, Hunting, gall nuts, certain ftreaks, and other fimilar defeSls. MONT •BLANC. See MJlt-BlANC. MONTAGUE, Lady Mary Wortley, accom¬ panied her huiband who was fent on an embafly to Con- ftantinople in the beginning of the 18th century. On her return (he introduced the praclice of inoculation into England, and thence acquired great celebrity. She cultivated the belles lettres *, and at one period of her life (he was ’the friend of Pope, and at another his enemv. While they were at enmity with each other, Lady Mary Montague embraced every opportunity of defaming the poet, who well knew how to take re¬ venge. Both of them carried their animofity to fo great a height, that they became the fubjecl of public Mon converfation. After a long life, full of Angular and ~ romantic adventures, (lie died about the year 1760. From her we have Letters, written during her travels from the year 1716 to the year 1718. They have been tranflated into French, and publilhed at Rotterdam 1764, and at Paris 1783, one ,vol. 12mo. They are compofed in a lively, interefting, and agreeable ftyle, and contain many curious fafts relating to the manners and government of the Turks, which are nowhere elfe to be found. The Baron de Tott, who lived many years at Conftantinople, attacked them with great Se¬ verity ; but they have been defended with equal zeal by M. Guis of Marfeilles, who has published a valuable work on Turkey. It need not appear extraordinary, that perfons who have vilited the fame country Ihouid not fee things in the fame light. How few travellers agree in their accounts of the fame objefls, which they neverthelefs pretend to have feen and to have examined with attention. Montague, Edward Wortley, fon of the former, palled through fuch variegated feenes, that a bare re¬ cital of them would favour of the marvellous. From . Weftufnfler fchool, where he was placed for education, he ran away three feveral times. He exchanged clothes with a chimney-iweeper, and he followed for fome time that footy occupation. He next joined himfelf to a filherman, and cried flounders in Rother- hithe. He then failed as a cabin boy to Spain ; where he had no fooner arrived, than he ran away from the veffel, and hired himfelf to a driver of mules. After thus vagabondizing it for fome time, he was difeovered by the conful, who returned him to his friends in Eng¬ land. They received him with a joy equal to that of the father of the prodigal fon in the gofpel. A private tutor was employed to recover thofe rudiments of learn¬ ing which a life of dlflipation, of blackguardifm, and" of vulgarity, might have obliterated. Wortley was fent to the WTeft Indies, where he remained fome time ; then returned to England, afted according to the dig¬ nity of his birth, was chofen a member, and ferved in two fucceflive parliaments. His expences exceeding hi.s income, lie became involved in debt, quitted his native country, and commenced that wandering traveller he continued to the time of his death. Having viflted moft of the eaftern countries, he contrafled a partiali¬ ty for their manners. He drank little wine, a great deal of coffee ; wore a long beard ; fmoked much : and, even whilft at Venice, he was habited in the eaft¬ ern ftyle. lie fat crofs legged in the Turkifti faftrion through choice. With the Hebrew, the Arabic, the Chaldaic, and the Perfian languages, he was as well ac- quainted as with his native tongue. He publiftred (e- veral pieces. One on the “ Rife and Fall of the Ro¬ man Empiree.” Another an exploration of “ The Caufes of Earthquakes.” As this gentleman was remarkable for the uncommon incidents which at¬ tended his life, the clofe of that life was no lefs marked with Angularity. Pie had been early mar¬ ried to a woman who afpired to no higher a cha¬ racter than that of an induftrioijs waftrerwoman. As the marriage was folemnized In a frolic, Wortley ne¬ ver deemed her fufficiently the wife of his bofom to' cohabit with her. She was allowed a maintenance. She lived contented, and was too fubmiffive to be trouble forr.L . MON [ 344 1 M O N Montague troublefome on account of the conjugal rites. Mr Mon- tugue, on the other hand, was a perfect patriarch in his jVorna.i.i,-. manners. He had wives of almoft every nation. When he was with Ali Bey in Egypt, he had his houiehold of Egyptian females, each ft riving who fhould be the happy (lie who could gain the greateft afcendency over this Anglo-Eaftern baftiaw. At Conftantinople, the Grecian women had charms to captivate this un¬ fettled wanderer. In Spain a Spanifh brunette, in Italy the olive-complexioned female, were folicited to partake the honours of the bridal bed. It may be afked what became of this group of wives ? Mr Mon¬ tague was continually ftiifting the place, and confe- quently varying the fcene. - Did he travel with his wives as the patriarchs did with their flocks and herds ? No fuch thing. Wortley, confidering his wives as bad travelling companions, generally left them behind him. It happened, however, that news reached his ears of the death of the original Mrs Montague the wafherwoman. Wortley had no iffue by her •, and without iffue male, a very large eflate would revert to the fecond fon of Lord Bute. Wortley, owing the fa¬ mily no obligations, was determined, if poflible, to defeat their expectations. He refolved to return to England and marry. He acquainted a friend with his intentions : and he commiflioned that friend to adver- tife for any young decent woman who might be in a pregnant Rate. Several ladies anfwered it. One out of the number was felefted, as being the moft eligible objeCt. She waited with eagernefs for the arrival of her expeCted bridegroom •, but, behold, whilft he was on his journey, death very impertinently arrefted him in his career. Montague Iflartd, one of the Hebrides, in the South fea, near Sandwich ifland. E. Long. 168. 37. S. Lat. 17. 26. MONTAIGNE, Michel de, a French gentleman, was born in Perigord in 1533. His father educated him with great care, and made him learn Latin as other children learn their mother tongue. His tutors wTere Nicholas Gronchi, who wrote De Comitiis Roma- norum ; William Guerenti, who wrote on Ariftotle j George Buchanan j and M. Anthony Muret. He was alfo taught Greek by way of recreation j and becaufe fome think that darting children out of their fleep fpoils their underftanding, he was awakened every morning with the found of mufic. He was counfellor for a while in the parliament of Bourdeaux •, after¬ wards made mayor of Bourdeaux. He publiftied his Ejftiys, fo much known in the world, in 1580. Mon¬ taigne had a great deal of wit and fubtlety, but no fmall (hare of conceit and vanity. The learned and ingenious are much divided in their opinion about his works. He died in 1592. MONTALCINO, a fmall populous town of Italy, in Tufcany, and in the territory of Sienna, with a bi- ihop’s fee. It is feated on a mountain, 17 miles fouth- eaft of Sienna, and 44 fouth-eaft of Florence. E. Long. II. 30. N. Lat. 43. 7. MONTALTO, an epifcopal town of Italy, in the Marca of Ancona j feated on the river Monacio, 10 miles north of Afcoli, and 45 fouth of Ancona. E. Long. 13. 30. N. Lat. 42. 54. MONTAN1STS, Chriftian heretics, who fprang up about the year 171, in the reign of the emperor I Marcus Aurelius. They were fo called from their Montanifts- leader, the herefiarch Montanas, a Phrygian by birth ; ^ ^ wdrence they are fometimes ftyled Phrygians and Caia- ti-;j " Phrygians. , —. J Montanus, it is faid, embraced Chriftianity in hopes of rifing to the dignities of the church. He pretended to infpiration 5 and gave out, that the Holy Ghoft had inftruCted him in feveral points, which had not been revealed to the apoftles. Prifcilla and Maxrmilla, two enthuftaftic women of Phrygia, prefently became bis difciples j and in a ftiort time he had a great number of followers. The biftiops of Alia, being affembled together, condemned his prophecies, and excommuni¬ cated thofe who difperfed them. Aftenvards they wrote an account of what had paffed to the wreftem churches, where the pretended prophecies of Montanus and his followers were likewdfe condemned. The Montanifts, finding themfelves expofed to the cenfure of the whole church, formed a Ichifm, and fet up a diftinft fociety under the direftion of thofe who called themfelves prophets. Montanus, in conjumftion with Prifcilla and Maximilla, was at the head of the fed!. Thefe fedfaries made no alteration in the creed. They only held, that the Holy Spirit made Montanus his organ for delivering a more perfedf form of difci- pline than what was delivered by the apoftles. They refufed communion for ever to thofe who were guilty of notorious crimes, and believed that the biftiops had no authority to reconcile them. They held it unlaw¬ ful to fly in time of perfecution. They condemned fe¬ cond marriages, allowed the diffolution of marriage, and obferved three lents. The Montanifts became feparated into two branches, one of which were the difciples of Proclus, and the other of HLfchines. The latter are charged with fol¬ lowing the heterodoxy of Praxes and Sabellius con¬ cerning the Trinity. MONTARGIS, a confiderable town of France, in the Orleannois, and capital of the Gatinois $ feated on the river Loire, 62 miles fouth of Paris. E. Long. 2. 36. N. Lat. 48. 1. MGNTAUBAN, a confiderable towm of France, in Guienne, and territory of Quercy, feated on the river Tame, 20 miles north of Touloufe. E. Long. 1. 27. N. Lat. 43. 56. MONTBAZON, a town of France, in Touraine, 135 miles fouth-weit of Paris. E, Long. o. 45. N. Lat. 47. 17. MONTBELLIARD, a ftrong town of France, ca¬ pital of a province of the fame name, between Alface and the Franche Compte, feated near the rivers Alaine and Doux, 33 miles weft of Bafle, and 45 north-eaft of Bezan$on. E. Long. 6. 30. N. Lat. 47. 31. MONTBLANC, a tor n of Spain, in the province of Catalonia, 15 miles north of Tarragon. E. Long. 1. 5. N. Lat. 41. 20. MONTBRISION, a confiderable town of Fiance, and capital of Forez, feated on the river Veziza, 4ct miles weft of Vienne, and 250 fouth by eaft of Paris. E. Loner. 4, 27. N. Lat. 4^. 32. MONTECCHIO, a conftderable town of Italy, ire the duchy of Reggio, id miles fouth-eaft of Parma, and eight north-weft of Reggio. E. Loner. \ r r4. N. Lat. 38. 8. M ONT £-FALCcy MON [ 345 1 M ° N Monte- MONTE-Falco, a town of Italy, in the territory Falco 0f Church and duchy of Snoletto •, feated on a ,, ^ r mountain near the river Clitunno, 12 miles welt of quieu." Spoletto. E. Long. 12. 40. N. Lat. 42. 58. — MoNTE-Falcone, a town of Italy, in Friuli, with a caftle. It belongs to the Venetians, and is near the river Ponzano, 10 miles north-weft of Aquileia, and 12 north-weft of Triefte. E. Long. 13 o. N. Lat. 46. 4. Monte Fiafcone, a fmall but populous town of Italy, in the territory of the Church, with a biihop’s lee 5 feated on a mountain, near the lake Boliena, in a coun¬ try abounding with excellent wine, 1 2 miles fouth-weft of Orvieto, and 45 north-weft of Rome. E, Long. 12.4. N. Lat. 42. 26. MoNTE-Marano, a populous town of Italy, in the kingdom of Naples, and in the Farther Principato; feated on the river Galore, 18 miles fouth of Benevento. E. Long. 15. o. N. Lat. 40. 48. Monte-Alor-o-novo, or Monte-major el-novo, a con- fiderable town of Portugal, on the road from Lilbon to Badajoz. W. Long, 9. 35. N. Lat. 38. 42. „ MoNTE-Mor-o-velho, or Monte-major-el-velho, a town of Portugal in the province of Beira, with a very large caftle, feated in a fertile country, 10 miles fouth-weft of Coimbra, and 83 north of Lilbon. W. Long. 8. 9. N. Lat. 40. 5. MoNTE-Pelofo, an epifcopal town of Italy, in the kingdom of Naples, and in the Bafilicata 5 feated on a mountain near the river Bafiento, 14 miles call of Ci- renza. E. Long. 16. 28. N. Lat. 40. 46. Monte Pulfiano, a town of Italy, in Tufcany, with a biihop’s fee ; feated on a high mountain, near the river Chiana, in a country noted lor excellent wine, 25 miles fouth-eaft of Sienna, and 50 fouth by eaft of Florence. E. Long. 11. 49. N.'Lat. 43. 10. MoNTE-San&o, formerly called Mount Athos, a moun¬ tain of Turkey in Europe, on the gulf of Contefla. It is called Monte-Sanao, or the Holy Mount, becaufe there are 2 2’ monafteries thereon, in which are 4000 monks, who never fuller a woman to come near them. It is 17 miles fouth of Salonichi. E. Long.-24. 39. N. Lat. 40. 27. MoNTE-Verde, a town of Italy, in the kingdom of Naples, and in the farther Principato, with a biihop’s lee : 6o'miles eaft of Naples. E. Long. 15. 42. N. Lat. 40. 51. . MONTEGO bay, a town of Jamaica, and, next to Kingfton, the moft flourifhing in the ifland. It has a very conliderable commerce. T he harbour is capaci¬ ous ; but rather expofed to the north winds, which at certain times in the year blow with great violence. In June 1795, a fre confumed an immenfe quantity of llores, and great part of the town. MONTESA, a very ftrong town of Spain, in the kingdom of Valencia. It is the feat of an. order of knighthood of the fame name ; and is five miles from Xativa. W. Long. o. 30. N. Lat. 39. o. MONTESQUIEU, Charles de Sexondat, Ba¬ ron, a moft illuftrious Frenchman defcended, from an ancient and noble family of Guienne, was born at. the caftle of La Brede, near Bourdeaux, in 1689. The greateft care was taken of his education ; and at the age of 20 he had aftually prepared materials for his Spirit of Laws, by well digefted extracts from thofe Vol. XIV. Part I. immenfe volumes of civil law which he had ftudied, Montef- not barely as a civilian, but as a philofopber. He be- (lmeu' came a counfellor of the parliament of Bourdeaux in 1714, and was received prefident a mortier two years after. In 1721 he pubiifhed his Perfian Letters ^ in which, under the fcreen of Oriental manners, he fatiri- zed thofe of France, and treated of feveral important fubjedts by delicate tranfient glances: he did not avow this publication 5 but was no fooner pointed out as the author, than zeal without knowledge, and envy under the malk of it, united at once againft the Perfian Letters. He was received into the French academy in 1728 ; and having previoully quitted his civil employ¬ ments, he entirely devoted bimfelf to his genius, and was no longer a magiftrate, but a man of letters, Fla¬ ying thus fet himfelf at liberty, he travelled through Germany, Italy, Switzerland, Holland, and England, in which laft country he refided three years,, and con¬ tracted intimacies with the greateft men .hen alive ; for Locke and Newton were dead. The refult of his ob- fervations was, “ that Germany was fit to travel in, Italy to fojourn in, England to think in, and France to live in.” On his return he retired for tivo years to his eftate at La Brede, where he finilhed his work On the Caufes of the Grandeur and Declenfion of the Romans; which appeared in 1734. The reputation acquired by this laft wmrk only cleared the way for his greater undertaking, the Spirit of Laws, which was printed at Geneva in 2 vols. qto, 1750. This was immediately attacked by the adverfaries of his Perfian Letters, in a multitude of anonymous pamphlets ; con¬ taining all the reproaches to which a liberal mind is expofed from craft and ignorance. M. Montefquieu drew7 up a defence of this work ; which for truth, mo¬ deration, and delicacy of ridicule, may be regarded as a model in its way. This great man w*as peaceably enjoying that fulnefs of efteem which his great merits had procured him, when he fell fick at Paris, and died on the 10th of February 1755.—The following charadler of this great man is drawn by Lord Chefter- field. “ His virtues did honour to human nature, his writingsjuftice^ A friend to mankind, he afferted their undoubted and unalienable rights with freedom, even in his own country ; whofe prejudices in matters of religion and government he had long lamented, and endeavoured, not without feme fuccefs, to remove. He well knew, and juftly admired, the happy conftitution of this country, where fixed and known laws equally reftrain monarchy from tyranny, and liberty from li- centioufnefs. His works will illutlrate his name, and furvive him, as long as right reafon, moral obligation, and the true fpirit of laws, ihall be underftood, re- fpedfed, and maintained.” As to his perional qualities, we are ^old by his eulogift, M. d’Alembert, that “ he was of a fweet, gay, and even temper. Plis converfation was fpirited, agreeable, and inftrudfive. Nobody told a ^ftory in a more lively manner, or with more grace and lefs a {lie dilation. He had frequent abfence of mind ; but always awaked from it by feme unexpedted ftroke that re-animated the languiftiing converfation. Though he lived with the great, he retired whenever he could to his eftate in the country, and. there met his books, his philofophy, and his repofe. Surrounded at his leifure hours with peafants, after paving ftudi.ed man in the commerce of the world, he ftudied him in thoie X x fimple M ON [ - Monipzu- ample people folely inftruaed by nature. With them l-—t-^— - ^'e cheeirally conyerfed 5 he endeavoured, like Socrates, to find out their genius, and appeared as happy with them as in the moft brilliant aflemblies ; efpecially u'ien reconciled their difterences, and by his bene¬ ficence relieved them from their dilli-eires.” Lefides the works already mentioned, JVI. Montef- quieu wrote feveral fmall pieces, as the Temple of Gni- du.', Lyfimachus, atid an EiTayupon rafie, whiclr is left rinfinilhed. His works have been collefted fince his deatn, and printed at Paris in a fplendid edition, in quaiio. i. ney have hkewife all of them been tranflated into Englifii. ^ EZUMA, or Moxte^uma, was emperor or king of Mexico when Cortez invaded that coun¬ try in 1518, invited thither, as he pretended, by the inhabitants, whofe children Montezuma, in the blind- r.efs^of his fuperftition, had facrificed to his idols. The warlike animals on which the Spanilh officers were mounted, the artificial thunder with which they were timed, the wooden cafiles on which they had croffed the ocean, the armour with which they were covered, the vidfories which they gained wherever they went • all thefe circumftances, added to that foolifli difoolition to wonder which always characterizes a fimple people, fo operated upon the minds of the Mexicans, that when Cortez arrived at the city of Mexico, he was received by Montezuma as his mafter, and by the inhabitants as a god. At firft they fell down in 'the ftreefs when a Spamlh valet paffed by 5 but by degrees the court of Montezuma grew familiar with the It rangers, and ven¬ tured to treat them as men. Montezuma, unable to expel^ them by force, endeavoured to infpire them with confidence at Mexico by expreflions of frienbfhip while he employed fecret means to weaken their power in other quarters. With this view, one of his generals , who had private orders to that purpofe, attacked a paity of the Spaniards wdio were Rationed at Vera Cruz ; and, although his troops were unfuccefsful, yet three or four of the Spaniards were killed. The head of one of them was carried to Montezuma. In confequence or tuis, Cortez did what has been reckoned one of the boldeff political ftrokes that ever was performed, file ran to the palace, followed by fifty of his troops : and, by perfuaflon and threats, carried the emperor prifoner into the Spamfh quarters. He afterwards obliged him to deliver up thofe who had attacked his troops at Vera Cruz : and, like a general who puniihes a com¬ mon loldier, he loaded Montezuma with chains. He next obliged him to acknowledge himfelf in public the vaflal of Charles V.; and, in name of tribute for this homage, Cortez received 600,000 merks of pure gold. Montezuma foon afterwards fell a facrifice to his fub- miffiion to the Spaniards. He and Alvaro, the lieu¬ tenant of Cortez, were befieged in the palace by i2°0r°ir0 ^f‘;x,crans* The emperor propofed to (how !Unr™r0 hlS ,fubje£h’ tb3t he perfuade them to defift from the attack : but the Mexicans no longer confidered him m any other light but as the fiave^of loreign conquerors. In the midft of his fpeecli, he received a blow with a Rone which wounded him mor¬ tally; and he expired foon after, A. D. 1520 See Cortez. This unfortunate prince left two fons and three daughters, who embraced the ChriRian faith The eldeft received baptifm, and obtained from Charles 46 ] M O N ^ . lands, revenues, and the title of count de IMontc- i-uma. He died in 1608 ; and his family is one of the mofl powerful in Spain. MONTFERRAT, a province of Italy, with the title of a duchy ; bounded on the eaft by the duchy of Miian, and part of the territory of Genoa ; on the north, by the Vercellefe and Canavefe ; on the we if, by Piedmont properly fo called; and on the fouth by the territory of Genoa, from whence it is feparated by the Apennine mountains. It contains 200 towns and caitles ; and is very fertile and well cultivated, abound¬ ing in corn, wine, oil, and filk. It belongs to the king or Sardinia, and Cafal is the capital town." MONTFORT, a town of France, in Upper Bre¬ tagne, feated on the River Men, 12 miles from Rennes. Wi Long. 1.58. N. Lat. 48. S. ^ Montfort, a hand fame and flrong town of the Netherlands, in the United Provinces, with an ancient caiile ; feated on the river Yflel, {even miles from Utrecht. E. Long. 5. o. N. Lat. 52. 4. Monti ort, a town of Germany, in the circle of Suabia, on the confines of Tirol, 16 miles fouth of Lindow, and the lake Conflance. It is capital of a country of the fame name, which has been almofl all purchafed by the houfe of Auftria. E. Long. o. N. Lat. 47. 22. . Moxtfort-de-lf.mos, an ancient town of Spain, intne kingdom of Galicia, with a magnificent caftle, wnere the Comarca of Lemos refides. It is feated in a fertile country, 25 miles north-eafl of Orenfa, and ? c fouth-eaft of Compofiella. W. Long. 7. 9. N. Lat. AIontfort-l’amuly, a town in the IRe of France, vMlh the title of a duchy, 25 miles from Paris. E. Long 2. 50. N. Lat. 48. 45. 6' MON 1 GAI Z, a to\vn ijf Lowrer Hunga-y, in the county of Pereczas, with a Rrong fortrefs. It is en- compalled with a great morafs, and art and nature have rendered it almofl impregnable. It was defended by th" princefs Ragotfky, wife of Count Tekeli, when befieged by an army of the imperialiRs, who were obliged" to raife the fiege in 1688. E. Long. 21. cc.N. Lat. 46. 26 MONTGERON, Louis-Basile-Carre be, was born at Paris in 1 686 : his father was mafler of re- quefls. He was fcarcely 25 years of age when he pur- chafed the place of counfellor in parliament, where by bis wit and external qualifications he gained confider- ab'e reputation. Deeply engaged in all the vices which Row from irreligion, he was converted by an extraordinary circumftance. He went on the 7th of September 1731 to the tomb of Deacon Paris, with an intention to examine, with the rigour of the fevereR critic, the miracles which were reported to be per- ormed there. But, according to his own account, he felt himfelf fuddenly beat, to the earth by innumerable baflies of light with which lie was furrounded. His incredulity was converted into flaming zeal, and he Became the apoflle of the faint whom he formerly ri¬ diculed. . Prom that moment be devoted himfelf to the fanatic!fm of convuljions, with the fame impetuo- flty of chara&er with which he had run into the mofl fliameful exceffes. He had not long been the difciple of Janfenifm when he fuffered perfecution. When the chamber of inquefls. was banifhed in 1732, he v-.ms lent into the mountains of Auvergne; which, in- Read Montferrat il Montgeron. M O N Montgeran Resd of cooling, tended rather to Montgome- ryfhire. inflame During his exile, he formed the plan of colle&ing the proofs of the miracles wrought at the tomb of the abbe Paris, and of compofmg what he called a De- monjlration of them. On his return to Paris, he pre^ pared to execute this plan 5 and on the 29th of July 1757, he actually prefented to the king at Verfailles a volume in quarto luperbly bound. This work he accompanied with a fpeech, which is a mixture or zeal and argument in a tolerable ftyle. In confe- quence of this work, which fome confider as a mafter- piece of eloquence, and others as a mafs of abfurdi- ties, he was committed to the Baftile. After a few months confinement, he was fent to an abbey of Be- nedi&ine monks in the diocefe of Avignon 5 whence he was, in a ihort time carried to Viviers. Pie was afterwards confined in the citadel of Valence, where he died, A, D. 1 574> agec* 68- The work which he prefented to the king was entitled La verite des Mi- + * Krty* /I in tevs'e/lififi /JP A/f. P/71'7 C (7*1*/?.—— tacles operees par Lintercc{jion de M. Pans, of the year in Julius Csefar’s time had anticipated its true place 67 whole days : thefe he intercalated be¬ twixt November and December : fo that the year con¬ fided, for this onetime, of 15 months or 443 days, lids reformation was called the 'Julian correShon, and and this year the year of confufon. At the end of 1 2 years,^ by the ignorance of priefts, who did not under- ftand intercalation, 12 days had been intercalated for nine. This was obferved by Auguftus Caefar, and rec¬ tified, by ordering 12 years to pais without any interca¬ lary days. 1 he order and fuccefiion of months was the fame as that of Numa: But January, March, May, /hnnti/is, Sexti/is, October, and December, had each 31 days; April, June, September 30, and February, in common years, 28 ; but every fourth year or biflex- tile 29. This, with a very little difference, is the ac¬ count obferved at prefent. ^umti/is, in compliment to Julius Caefar was called July, becaufe in this month he was born ; and Sextihs, in honour of Auguftus, was called Auguft; both which names are flill continued.—— See Year. Each month by the Romans was divided into ka¬ lends, nones, and ides, ad of which were reckoned back¬ wards. Ihe kalends were the firft day of the month. J he nones fell on the feventh, *nd the ides on the 13th, of March, May, July, Oftober—but in all other months the nones were on the fifth, and the ides on the 13th. For the more eafy comprehenfion of the Roman manner of dating, according to this divifion of the months, here follows adable. Mon tfi. March M O N Month ' - 11 . Montpelier. March May July Odlober KalencLe 6 j 5 4 4 5! 3 . 6 Pnd. Non. ~j\ No rue 8 7 6 5 4 3 . Prid Idas Idas n 16 15 M 13 12 I I IO January Auguft December April June September November Februarv. 7 6 5 4 3 rid. Kal. Kalends 4 3 Prid. Non. Nome 8 7 6 5 4 3 Pn>/. Zst/j- fans T9 18 *7 16 x5 'M !3 12 11 10 9 8 7 6 5 4 3 Prid. Kal. Kalends 4 3 . Prid. Non. Nonce 8 7 6 5 4 3 . Prid. Idas Idas 18 ■7 16 15 J4 *3 12 11 10 9 7 6 5 4 3 Prid. Kalendce 4 _3 . /V/<7. iYo«. No ns. 8 7 6 5 4 3 . pr/r/. /c/wr Idas 16 I5 14 J3 12 11 10 9 8 7 6 5 4 3 Pn’c/. Kal. Kal. N. B. Every leap year, February coniriling of 29 days, the 24th and 25th of that month are written fexto Kal. Mart. ; hence leap year is called BiJJcxtihs. MONTI A, a genus of plants belonging to the tri- andria clafs, and in the natural method ranking with thofe of which the order is doubtful. See Botany Index. MONTINIA, a genus of plants belonging to the dioecia clafs. See Botany Index. MONTMEDI, a fmall but rtrong town of France, in Luxemburg, feated on the river Chire, which di¬ vides it into the upper and lower towns. It is 22 miles fouth-eaft of Sedan, 27 fouth-rveft of Luxem¬ burg, and 135 north-eald of Paris. E. Long. 5. 23. N. Lat. 49. 32. MONTMORENCI, Francois Htnry dp:. See Luxemburg. MONTMORENCY, a town of France, with the title of a duchy, remarkable for the tombsmf the dukes of this name. It is feated on a hill, near a large val¬ ley, fertile in fruits, efpecially excellent cherries. E. Long. 2. 24. N. Lat. 48. 59. MONTPELIER, one of the finefl: towns of France, and the mod confiderable in the department of Herault, excepting Thouloufe, is fituated in E. Long. 3. 58. N. Lat. 43. 37. This town has been long famous for its falubrious air, and on this account has been the frequent 349 ] MON refort of invalids. But the climate, according to fomeNontpclier, travellers, is conllderably changed, having at times con- :^QJtrea1, dant rains for three months together, and often very thick fogs. Its dtuation, though on an eminence, never could be healthy; for between it and the Mediter¬ ranean (which is about three leagues dillant) it is one continued marfti, covered with noxious vapours, which, when the fea breeze fets in, blows direttly on the town and the country adjacent 5 of the fad effects of which, its unhealthy inhabitants, with their meagre looks, are the mod convincing prools. This city Hands upon a riling ground fronting the Mediterranean •, on the other fide is an agreeable plain, extending about the fame diftance towards the moun¬ tains of the Cevennes. It is reckoned well built, yet the dreets are in general narrow and the houfes dark. The inhabitants, many of whom are Protedants, are fuppofed to amount to 40,000, are fociable, gay, and good tempered. The trade oi Montpelier is very ex- teniive in wane, cordials, oil, verdigris, and iakpetre \—- and the manufactures in filk and woollen goods are con¬ fiderable. The markets are w?ell fupplied with filh, poul¬ try, butcher’s meat, and game, at reaionable rates. The wine of the country is itrong and harlh : Burgundy is dear, and fo is Iweet wine of Frontignan, though made in the neighbourhood of Cette. Liquors of various forts are compounded and diddled at Mont¬ pelier. The environs are extremely plealant, having on xone fide La Place de Peyrou, which forms a fine ter¬ race. From thence on a clear day, may be teen to the eaftward the Alps, which form the frontiers of Italy *, to the fouth weft, the Pyrenean mountains, which form thofe of Spain, both at about 50 leagues diftant ; and to the fouthward a mold extenfive view of the Mediter¬ ranean. Not far from thence is a noble aqueduCf, with a double tier of arches 5 by this, water is brought from a mountain at three leagues diftance, into two bafons in a finall elegant temple at the weft end of the totvn. Here alfo is a royal garden, where on certain days- public ledfures wrere formerly held on botany. On the other fide of the town is the eiplanade, a beautiful wralk, bordered on each fide by olive trees, from whence there as a pleafing profpedi of the fea and the country adjacent to the town. Previous to the revolution, Montpelier had a univerfity, an academy of fciences, and it was the fee of a bilhop. MONTREAL, an illand of North America, in the river St Lawrence, nine leagues in length, and three leagues broad, and about 60 miles above Quebec. It was taken from the French by generals Amherft and Murray on the 8th of September 1760. The foil of the ifiand is exceedingly rich and good, producing all kinds’of European fruits and vegetables in great abun¬ dance, with variety of garden fruits. The iouth fide is the moft inhabited, and of courfe beft cultivated j and befides the fettlements, which are numerous, the ifland is adorned with villas, for the retirement of the more wealthy merchants during the fummer fealbn. Since this place has been in the pofleflion of Britain, it has fullered much by fires, the houfes being moftly built of wood. The town of Montreal, fituated on this illand, and formerly called Ville Marie, is the fecond place in Canada for extent, buildings and ftrength 5 and befides. polfelling the advantage of a Ids rigorous climate, for delightfulnefe- M ON [ z Mor.trcal denghtfulnefs of fit oat ion is infinitely preferable to Que- MontirrEt.be.C: ftands on 1,16 fic^e orr a ^!J5 doping to the fouth, ——y—1'with many acrreeable villas upon it, which, with the ifiand of St Helen, and the river (which is here about two miles broad), form a moll charming landfcape. Though the city is not very broad from north to fouth, it covers a great length of ground from ead to well, and is nearly as large and populous as Quebec. The ilreets are regular, forming an oblong fquare; the houfes well ' uilt, and in particular the public eidhce ^3,. ]lang vourKl the cornice of the fanfluary. Funds have been bequeathed by different devotees for furnifhing them with oil. T iie choir above flairs is de¬ corated with the life of Chrift, in good wooden carv¬ ing. A gallery runs on each fide of the chancel, for the convenience of the monks. A large iron grate di¬ vides the church from the chapel of the Virgin, where the image Hands in a niche over the altar, before which burn four tapers in large fiiver candleflicks, the prefent of the duke of Medina Cell. In the facrifly, and paffages leading to it, are prelfes and cupboards full of relicks and ornaments of gold, fiiver, and precious ftones ; they point out, as the moil remarkable, two crotvns for the virgin and her fon, of ineftimable va¬ lue *, fome large diamond rings: an excellent cameo of Medufa’s head; the Roman emperors in alabafter } and the fword of St Ignatius. But as no offerings to this miraculous flatue can be rejedled or otherwife dif- pofed of, the ihelves are crorvded with moil vvhinifical ex votos, viz. fiiver legs, fingers, breafls, ear rings, watches, two wheeled chaifes, boats, carts, and fuch like trumpery. On different parts of the mountain, as already noti¬ ced, are a number of hermitages. Each of thefe fo- litary retreats, which at a diftance feem deftitute of every thing, has a chapel, a cell, a well in the rock, and a little garden. The inhabitant of one of them, which is dedicated to St Beneto, has the privilege of making an annual entertainment on a certain day j on which day all the other hermits are invited, when they receive the facrament from the hands of the mountain vicar, and after divine fervice dine together. I hey meet alfo at this hermitage, on 'the days of the faints to which their feveral hermitages are dedicated, to fay mafs and commune with each other. But at otner times they live in a very folitary and recline manner, perform various penances, and adhere to very rigid rules of abflinence ; nor do they ever eat flefh j nor are they allowed to keep within their walls either dog cat, bird, or any living thing, led their attention fhould be withdrawn from heavenly to earthly affec¬ tions. Moil of thefe hermits are faid to be perions of fortune and family, difgufled with the world, who have retired thither to devote themfelves to meditation, felf- denial, and contrition. Montserrat, one of the Caribbee ifles, belonging to Great Britain. It is a very fmall, but very plea- fant illand, fo called by Columbus from its refemblance to the famous mountain near Barcelona in Catalonia. It lies in W. Long. 6r. o. N. Lat. 16. 50. having Antigua to-the north-eafl, St Chriflopher’s and Nevis to the north-w7eil, and Guadaloupe lying fouth fouth- eafl at the diilance of about nine leagues. It is about nine miles in diameter, and is fuppofed to contain about 40,000 or 50,000 acres. The climate is warm, but lefs fo than in Antigua, and is efteemed very healthy. The furface is mountainous, but with pleafant, rich, and fertile valleys ; the hills are covered with cedars and other fine trees. Here are all the animals as well as vegetables and fruits that are to be found in the other iilands. The inhabitants railed formerly a confiderable quantity of indigo. The produce now is chiefly cotton, rum, and fugar. There is no good harbour, but three to¬ lerable roads, at Plymouth, Old Harbour, and Ker’s Bay. Meon. i ] M O O MONUMENT, in arckiteflure, a building deflined Monument to preferve the memory, &c. of the perfon who raffed it, or the perfon for whom it was raifed } fuch are a . maufoleum, a triumphal arch, a pyramid, &c.^ MOOD, or Mode. See Mode. Moods of SyIlogifm. See Logic, N° 85. Mood, or Mode, in grammar, the different manner of conjugating verbs. See Gravktar. MOON, {Luna D ), in afironorny, one of the hea¬ venly bodies, ufually ranked among the planets ; but with more propriety accounted a fatellite, or fecondary planet. Among the ancients, the moon was an objecl of prime regard.—-By the Hebrews (he wras more regarded than the fun, and they were more inclined to rvorfhip her as a deity. The new moons, or firft days of every month, were kept as feflivals among them, which were cele¬ brated with found of trumpets, entertainments, and fa- crifice. (See Numb, xviii. 11. x. 16. 1 Sam. xx. 5— 18.) People were not obliged on thefe days to reft. The feafis of new moons were a miniature reprefentation of the fealt of trumpets, which was held on the firft of the month Tifri, which was the beginning of the civil year. The Jews not being acquainted with the phyfical caufe of eclipfes, looked upon them, whether of fun or moon, as figns of the divine difpleafure. The Grecians looked upon the moon as favourable to marriage ; and the full moons, or the times of conjundlion of fun and moon, were held the mofl lucky feaions for'celebrating marriages ) becaufe they imagined the moon to have great influence over generation. The full moon was held favourable for any undertakings by the Spartans : And no motive could induce them to enter upon an ex¬ pedition, march an army, or attack an enemy, till the full of the moon. The moon was fuppofed both by Greeks and Romans to prefide ever child-birth.—The patricians at Rome wrore a crefcent on their fhoes, to diftinguifh them from the other orders of men. This crefcent was called Lunula. Some fay it was of ivory, ethers that it was worked upon the Ihoe, and others that it was only a particular kind of fibula or buckle. For the aftronomical phenomena conne£led with the moon, fee Astronomy Index. Harvejl-Moon.—It is remarkable, that the moon, during the week in which fhe is full in harveft, riles fooner after funfetting than fhe does in any other full moon week in the year. By doing .fo, file affords an immediate fupply of light after funfet, which is very beneficial to the farmers for reaping and gathering in the fruits of the earth : and therefore they diilinguifh this full moon from all the others in the year, by call¬ ing it the harvejl moon. Influence of the Moon on the Human Body.—The fa¬ mous Dr Mead was a believer in the influence of the fun and moon on the human body, and publifhed a book to this purpofe, entitled Ds Imperio Solis ac Lunce in Corpore humano : but this opinion has been exploded by moft philofophers, as equally unreafonable in itfelf, and contrary to fa£l. As the mofl accurate and fenfible barometer is not affeiled by the various pofitions of the moon, it is not thought likely that the human body fhould be affefled by them. Several learned and in¬ genious men, however, Hill confider Dr Mead’s doc¬ trine as far from being unfounded. Moon, Influence of on the Earth's Atniofpherc.—It > . has Moon. MOO [35 has been the opinion of the vulgar in almofl all ages and countries, that the changes which take place in ] MOO the Hate of our atmofphere, or the changes of the wea¬ ther, depend in a great meafure on certain fituations of the moon. This particular opinion is alluded to by Virgil (a), and is applied in the (hepherd of Banbury’s rules forjudging 'of the weather (b). We have, under Meteorology, N° 90 to 92, given the refult of lome oblervafions on the connetfion between the changes of the moon and thofe of the weather. It can fcarcely be c^oubted that an opinion fo gene¬ rally received muft be founded on fomething more than fancy orprejudce and ; indeed the obfei vations of feveral eminent meteorologiffs within the laft thirty years have contributed materially to favour this opinion. Inde¬ pendent of aflual obfervation, it appears reafonable to infer, that a body fo large, and fo near the earth, as the moon, whofe gravitating influence on the earth’s furface in producing the flux and reflux of the flea, cannot be altogether inactive with refpedt to the air, a fluid much more fufceptible of changes than the fea. We have already noticed (Meteorology, N® 14.) the theory' of Mr Luke How’ard, on the moon’s influ¬ ence on the mercury of the barometer, and we are now to give a fliort account of what has been advanced on her general influence by the philofophers of the conti¬ nent. Among thefe, Signior Toaldo may be faid to have led the way. from obfervations made at Padua, during fifty years, .on the (late of the weather that correfponded to certain changes of the moon, he found that thefe changes were always accompanied by good or bad weather; and he at length became enabled to foretel with fome degree of certainty what would be the flate of the atmofphere that fhould follow any fituation of the moon. There are ten fituations of the moon, which, according to Toaldo, are capable of producing a fenfible effedt on the See A[lro- earth’s atmofphere. Thefe are the fy^igies* or new and full moon; the quadratures ; the affldes, or apogee and perigee ; the lunflices, or thefe points when the moon is neareft to our zenith and at the greateft diftance from it; and the moon’s equinoxes. There are three differ¬ ent relations of the moon’s motion producing a corre- fponding number of revolutions, each having a certain duration, and each correfponding to fome of the above ten fituations, as it will be feen by the following table. nomyy i\° 90, Revolutions. 1. Synodical, in regard to the fun; continues 29 days ■ I 2 hour's 44 minutes. 2. udnomaltflic, in regard' to the moon’s courfe ; con¬ tinues 27 days 13 hours 43 minutes. Situations. 'New moon. Firfl. quarter. Full moon. _Laft quarter. Apogeum. Perigeum. 3. Periodical, in regard to T Afcending equinoxes, the moon’s paiiing the equa j Northern luniflices. tor ; continues 27 days, 7 J Defcending equinoxes, hours, 43 minutes. (_Southern luniilices. Sig. Toaldo has calculated a feries of probabilities that a change of weather will take place on the approach of any one of thefe ten fituations, and thefe he has ex- preffed in a tabular form as follows. That a change will take place at ' Ncwt moon Fir ft quarter Full moon Laft quarter Perigeum Apogeum Afceqding equinox Northern lunlftice Defcending equinox [_ Southern luniftice > is Moon. 6:1 5:2 5:2 5:4 7:1 4:1 r3:4 11:4 . 11:4 J l 3:I In general, each of the ten fituations changes the weather that prevailed under the preceding fituatiem, and it feldoru happens that a change of weather takes place without a correfponding change in the lunar fituations. From the inequality of their revolutions, thefe fituations are often combined, and by this union their effeef in producing changes of the atmofphere is greatly increafed, efpecially when a union takes place between the fyzigies and apfides. Thus, r New' moon with perigee That a change N Ditto with apogee will follow j Full moon with perigee C IS v Ditto with apogee J Thefe combined fituations are generally accompanied or followed by ftorms and tempefts, efpecially when they take place near the moon’s paffage over the equator. This is more particularly the cafe ,in the months of March and September, and we find that at the new and full moon in thefe months, the w'eather takes a certain charadler, by which it is diftinguifhed for the fucceeding three or fix months. The fame takes place at the folftices, efpecially at the winter folftice. The new moon does not always, however, produce a change of weather; and this want of effebt is moft likely to hap¬ pen at thofe new moons which are moft diflant from the apfides. Though Toaldo confiders it as perfectly afeertained that each fucceeding fituation of the moon alters that ftate of the atmofphere which had been produced by the preceding fituation ; it muft, however, be obferved to at lome fituations of the moon favour good and others bad weather. Thus the perigee, the new and full moon, the paffage over the equator, and the northern luniftice are favourable to bad weather, while the apo¬ gee (A)- lunafque fequentes Ordine refpicies ; nunquam te craflina fallet Hora, neque infidiis nobfis capiere ferenae. Georg. I. 424. (B) 1. IJorns of the moon obfeure—Rain. 2. When the moon is red—Wind. 3. On the fourth day of the new moon, ir bright, with lharp horns—iVo winds nor ram till the month he flnijhed. 4 MOO [ 353 1 MOO Moon, gee, quadratures, and louthern lunitlice, are more favour- *r‘~^ able to good weather. The changes produced by the influence of the lunar fituations, feldom take place on the exadt days on which thefe fituations happen, but either precede or follow them; and Toaldo has found that, in the fix winter months, the changes of weather commonly precede the lunar fituations, whereas in the fix fummer months they more commonly follow them. There are certain days before and after new and full moon, which deferve particular attention in forming our judgements of the weather, efpecially the odlants or the fourth day before new and full moon, as at thefe times the weather is inclined to change, and it may be pretty certainly predicted, that a change will follow at the next lunar fituation. Virgil has particularly noti¬ ced this fourth day as a fure mark of the fucceeding weather (c). If the weather continues unchanged on the fourth, fifth, and fixth day of the moon, it proves that the lunar influence is at that time very weak, and we are to expeft no change till the full moon, or perhaps till the next new moon. Sig. Toaldo compared a diary which he had kept for many years of the ftate of the barometer with the ten fituations of the mopn, and from the comparifon deduced the following -conclufions, viz. 1. That at the time of the moon’s apogee, the mer¬ cury rifes higher by the fixth part of a line than at the perigee. 2. That at the time of the quadratures it is higher by the tenth of a line than at the time of the fyzigies. 3. That it is higher by a fourth of a line at the fouthern than at the northern luniffice. This corre- fpondence of the lunar fituations with the afcent of the mercury in the barometer does not hold at the time of the moon’s paffage through her equino61ial points. The mercury is then higher, efpecially when file is palling in Libra ; and as fuch fituations of the moon generally indi¬ cate bad weather, this circumftance is not conformable to meteorological obfervations. In this cafe Toaldo thinks that we muft be guided, in our jifHgement of the weather, rather by the moon than by the barometer. The cafe is fimilar during the coincidence of the equinoffial points with the perigee, at which time the mercury is unufually high j but this coincidence is a fign of great irregularity. According to Toaldo, the rifing and fetting of the moon, as well as its fuperior and inferior paffage of the meridian, all which fituations he calls the moon’s angles, may ferve for foretelling rain. The feafons moft expo- fed to rain, are the riling and fetting of the moon j while it;, paffage over the meridian is moft favourable to good weather. It has ever been obferved that during rainy days, the fky ahvays clears a little while the moon is palTing the meridian. An exception to this rule muft, however, be made when the moon’s angle does not coin¬ cide with that of the fun. You XIV. Part I. (c) Luna revertentes cum primum colligit ignes, Si nigrum obfeuro comprenderit aera cornu j Maximus agricolis pelagoque parabitur imber. At, fi virgineum fuffuderit ore ruborem, Ventus erit j vento femper rub«t aurea Phoebe. Bad years take place when the apfides of the moon Moon, fall in the four cardinal points of tile zodiac. f heir —" intervals, therefore, are as four to five, eight to nine, &c. or as the intervals of the paffage of the apfides through the four cardinal points of the zodiac. Thus the year 1777 was, in general, a bad year j and in that year the apfides of the moon were in the equinoifial figns $ and it is probable that the years in which the apfides fall in the figns Taurus, Leo, Virgo and Aqua¬ rius, will be good and moderate years, as the year 1776 really was j and in that year the apfides of the moon were in Taurus and Virgo. Every iBth year muft be fimilar. We, however, cannot depend upon a return altogether the fame, on account of the three different revolutions of the moon j and therefore it may happen, that the epoch of this ex¬ traordinary year may be retarded a year or perhaps two. Though approximations only are here given, this does not prevent their being ufeful to farmers, if they only pay attention to circumftances. Belides, various excep¬ tions muft be made for different parts of the earth 5 and it is difficult to determine thefe before-hand, as what regards this fyftem is applicable to the wffiole globe ; but when the refult of the fyftem has been improved by local obfervations, the conjectures for each country will be attended with more certainty. The 54th year muft have a greater fimilarity to the firft than to all the reft j becaufe, at this period, the fituations of the moon, in regard to the fun and the earth, are again found in the fame points. The quantity of the rain which falls in nine fucceffive years, is almoft equal to that which falls in the next following nine. But this is not the cafe when we com¬ pare in like manner the quantity of rain which falls in fix, eight, or ten years*. * See Phil The obfervations of M. Lamarck, though they con- vo1, firm the opinion of the moon’s general influence on the atmofphere, do not agree with thofe of Toaldo, as to the fituations of that luminary which correfpond to the changes of the weather. He could not find that agree¬ ment between the fyzigies and quadratures of the moon and a change of weather, which has been fo much dwelt on by Toaldo; but he is of opinion, that we are to confider the declination of the moon as the principal caufe of her influence on the atmofphere. Lalande had conceived the idea that when the moon entered the northern hemifphere, or had north declination, the weather was moft likely to be cold and dry, and that when fhe paffed to the fouth of the equator, it wras likely to be rainy. The obfervations of Lamarck, however, tend to eftablifh the contrary opinion. Lamarck confiders the two following principles as eftabliffied by his obfervations 5 viz. 1. That it is in the elevation af the moon above, and her deprejjion below, the equator that we are to fearch for thofe regularly varied effeBs which floe produces on our atmofphere. 2. That the determinable circumjlances, which con- Y y fpb'e Sin ortu in quarto (namque is certiffimus au&or) Pura, neque obtufis per coelum cornibus ibit j Totus et ille dies, et qui nafeentur ab ilio Exaftum ad menfem, pluvia ventifque carebunt. See Note (b) Georg. I 427. MOO [ 35+ J MOO Moon, fpirc to increafe or diminijh the moon's influence in her ' v different declinations, are her apogees and perigees, her eonjuTiciionx with and oppofltions to the fun; and laflly, the folar fo/flices and equinoxes. Confidcring that every lunar month, or every revolu¬ tion of the moon in the zodiac, may be divided into two diftindl portions, each containing about fourteen days, and each giving occafion to a particular atmofpheric conltitutmn, we may affume thefe as two circumllances of importance in meteorology, and we may call one the boreal or northern conliitution, viz. that in which the moon paffes through the fix northern figns of the zodiac, and the other, the auflrai or fouthern conflitu- tion, viz. that in which file traverfes the fix fouthern figns. _ , Lamarck is convinced by obfervation, that in thefe climates, during a boreal conflitution, there chiefly pre- vai loutherly, fouth-wreflerly, and wefterly winds, though fometimes, in the fummer, the winds pafs to the fouth- eaft. In general, during this conftitution, the barome¬ ter exhibits only moderate elevations of the mercury ; mofl commonly the feafon is rainy or moifl, and the air loaded wdth clouds. And laftly, it is particularly during this conftitution that we obferve the effects of llorms and tempefis, when the caufes which occafion them become active. .On the contrary, during an auftral conftitution, the winds which chiefly predominate blow from the north and north-w’eft, and in the fummer north-eaft, and even eafterly winds. In general during this conftitution, the barometer exhibits confiderable elevations-in the column of mercury, at leaft.if the wind is not very ftrong j the weather is then moft ufually clear, cold and dry, and in the fummer it is feldom (we might almoft fay never) during this conftitution that ftorms are formed. Thefe atmofpheric conftitutions are not, however, fo permanently charadlerifed as to render it eafy to diftin- guilh them at all times by the ftate of the atmofphere. The atmofpheric air is a moveable fluid, and fo eafily difplaced, that it is not furpriling that in the temperate zones, wdiere the influence of the heavenly bodies a£ls lefs ftrongly than between the tropics, from various caufes, that counteraft very often the regular influence of the moon, and tend to malk and even change its ef- fedls. The perturbations which thefe variable caufes pro¬ duce on the regular effe£Is of the influence of the inoon on the atmofphere, occafion in fadt many variations in the two atmofpheric conftitutions which we have been deferibing ; and this is doubtlefs the reafon why they have been hitherto difregarded. M. Lamarck pofitive- ly aflerts, that thefe perturbations, though frequent, and fometimes very confiderable, do not prevent the cha- radler ot each of thefe conftitutions from being remark¬ ed in the greateft number of cafes. The probability that he finds, according to his ob- fervations, is eftimated at five out of eight j that is to fay, out of 48 atmcfpheric conftitutions comprehended in the lunar year, he eftimates there will be found at leaf! 30 agreeing with the principles pointed out in his memoir j and he adds, that among the difturbing caufes which modify the before-mentioned effects, feveral may be forefeen, and perhaps even appreciated as to their quantity of effedl. He confiders what is here pointed out as a fad! \ as an order of things which any one may prove by obferva- Moon, tion *. ' v * Lamarck has alfo endeavoured to afeertain what truth 'y0^* there may be in the periodical return of the variations^, and of the atmofphere at the end of nineteen years ; and \\zNtchol. has found, by comparing meteorological oblervations,^0^' 4toj that this return is far from being fo corredt as is gene-v0^' ^v‘ rally believed. Aftronomers alfo know7 well, that the cycle of nine¬ teen years is not exadt within an hour and a half; an error which amounts to a whole day in the courfe of 308 yearsf Phil.Mag, M. Cotte has alfo bellowed much attention on this ' ’ V* fubjed! of the moon’s influence j but appears to think that our obfervations are not fufficiently. numerous or accurate, to deduce any thing like a corredt theory, and he is not difpofed to go fo far as M. Lamarck. M. Cotte agrees in general with Mr Luke Howard’s obfervations on the moon’s influence. (See Meteoro¬ logy). He noted, during the fpace of 34 years and five months, (from the lit of January 1768, to the 22d of May 1802), the afeending and delcending di- redtion of the barometer in each of the fyzigies and quarters of the moon which have occurred through that period of lime. He ftates the total fum of the eleva¬ tions and depreffions of the mercury at each of the phafes as follow7s» F°r 3+i Years. New Moon, ift Quar. Full Moon. 2d Quar. Sum of elevations 218 296 199 290 times. depreflions 281 229 279 106 Differences 63 67 80 84 Thefe refults, of nearly 35 years’ obfervations, con¬ firm, as will be feen, the conclufions drawn by Mr Ho¬ ward, both from his obfervations for one year at Plaiftow7, and thofe made for 10 years in the Royal Society’s apartments. It is to be remarked, iff, That the four numbers, which exprefs the differences between the elevations and depreflions are nearly in an exadt proportion, fince 63 : 67 :: 80 . 85^. 2dly, That the two latter phafes, viz. the full moon and laft quarter, have more effedt than the two firft. jdly, He examined what phafes of the moon corre- fponded to the greateft and leaf! height of the mercury for each month during ten years, and obtained the fol¬ lowing refults. Fono Years. New Moon. 1 ft Quar. Full Moon. Greateft elevation 7 occurred at Greateft depref- 7 fion occurred at _y3° 40 34 26 29 2d Quar. 28 times. 27 Differences 4 6 3 1 T he fcience may be therefore faid to have advanced one ftep farther towards perfedlion on this occafion ^ and it is to be hoped that, by redoubling our diligence in multiplying obfei vations, and combining them in va¬ rious ways to obtain their refults, its progrefs may be ftill accelerated. The uieful purpoles which may be thereby anfwered in philofophy, agriculture, and medi¬ cine, may be properly urged to cbfervers as the means of MOO Moon 0f fapporting their ardour, and indemnifying them for Moore t^°^e farcafms and relieftions which even fome karned i men have been pleafed to beifow upon obfervations of *Fhil.Mag. this fort, together with their authors. * v»l. xiii. MeoN-Eyes, among horfes, when the weaknefs of the eye increafes or decreafes according to the courfe of the moon ; fo that in the wane of the moon his eyes are muddy and troubled, and at new moon they clear up. This obfervation is probably inaccurate. MooN-Jlone, or Adularia. See Adularia, Mine¬ ralogy Index. Moon-Wort. See Lunaria, Botany Index. MOOR, in country affairs, denotes a traft of land, ufually overrun with heath. MooR-Cock, or Gor-Cock. See Tetrao, Ornitho¬ logy Index. Moor Land, or moory foil, in Agriculture, is a black, light, and foft earth, very loole, and without any admixture of Hones 5 and with very little clay or fand. MOORE, or More, Edward, an ingenious writ¬ er, was bred a linen draper, but quitted bufinefs to join the retinue of the Mufes; and he certainly had a very happy and pleafing talent for poetry. In his Trial of Selim the Perfian, he complimented Lord Lyttleton in an elegant kind of panegyric, couched under the ap¬ pearance of accufation : and his Fables for the Female Sex, for eafy verfification, poignant fatire, and ftriking morals, approach nearer to the manner of Gay than any other of the numerous imitations of that author. He wrote alfo three dramatic pieces ; The Gamefler, a tragedy ; The Foundling, and Gil Bias, comedies. The fuccefs of thefe was not fuch as they merited, the firff of them having met with a cold reception, for no other apparent reafon but becaufe it too nearly touched a favourite and fafhionable vice j and the fecond hav¬ ing been condemned for its fuppofed refemblance to Sir Richard Steele’s Confcious Lovers, but to which good judges have been inclined to give it greatly the prefe¬ rence. Mr Moore married a lady of the name of Ha¬ milton, daughter to Mr Hamilton table-decker to the princefles, who had herfelf a very poetical turn, and has been faid to have affifted him in the writing of his tragedy. One fpecimen of her poetry, however, was handed about before their marriage, and has fmee ap¬ peared in print in different colledlions of fongs, parti¬ cularly in one called the Goldfinch. It was addreffed to a daughter of the famous Stephen Duck ; and be¬ gins with the following ftanza : Would you think it, my Duck ? (for the fault I muff own), Vour Jenny at laft is quite covetous grown : Though millions if Fortune fhould lavilhly pour, I Hill would be wretched if I had not More. And after half a dozen ftanzas more, in which, with great ingenuity and delicacy, and yet in a manner that expreffes a great affeftion, fhe has quibbled on our au¬ thor’s name, fhe concludes with the following lines : You may wonder, my girl, who this dear one can be, Whofe merit can boaff fuch a conqueft as me : But you fhan’t know his name, tho’ I told you be¬ fore, It begins with an M, but I dare not fay More. MOO In the year 17J3, Mr Moore commenced a weekly Mooring mifcellaneous paper, entitled, The 'World, by Adam H ^ Fit%-Adam, in which undertaking he was afiifled by 1 oor an ,s; Lord Chefterfield with fome effays. This paper was colle&ed into volumes, and Mr Moore died foon after. MOORING, the a£t of confining and fecuring a fhip in a particular ftation, by chains or cables, which are either faftened to the adjacent fliore, or to anchors in the bottom. A (hip may be either moored by the head, or by the head and Hern j that is to fay, fhe may be fecured by anchors before her, without any behind •, or (lie may have anchors out, both before and behind her ; or her cables may be attached to ports, rings, or moorings, which anfwer the fame purpofe. When a fhip is moored by the head with her own anchors, they are difpofed according to the circum- ftances of the place where (lie lies and the time (he is to continue therein. Thus, wherever the tide ebbs and flows, it is ufual to carry one anchor out towards the flood, and another towards the ebb, particularly where there is little room to range about ; and the anchors are laid in the fame manner, if the veflfel is moored head and ftern in the fame place. The fituation of the anchors, in a road or bay, is isfually oppofed to the reigning winds, or thofe which are moft dangerous 5 fo that the (hip rides therein with the effort of both her cables. Thus if fire rides in a bay, or road, which is expofed to a northerly wind and heavy fea from the fame quarter, the anchors parting from the oppofite bows ought to lie eaft and weft from each other : hence both the cables will retain the fhip in her fta¬ tion with equal effort againft the a the mafts or cable bolts. A great number of moorings of this fort are fixed in the har¬ bours adjacent to the king’s dock-yards, as Deptford, Chatham, Portfmouth, Plymouth, &c. MOORLANDS, a tradl fo called, in the north part of Staffbrdftiire, where the land rifes gradually in¬ to fmall hills, which run through the midft of England in one continued ridge, rifing higher and higher to Scotland, and fending forth many rivers. The foil here is fo foul and cold, that the fnows lie almoft all the year on the, tops of the hills; and it is withal very rug¬ ged and barren : it, however, yields plenty of ccai, lead, copper, rance-marble, and millftones •, and fome of the limeilone hills bear fuch a fweet though (hort grafs, as is very.grateful to the oxen, of which here is Y y 2 a [ .155 1 MOP [ 356 ] M O R Mrors M opfus. a very good breed. It is obferved here, that the weft wind always brings rain, and the eaft and fouth fair weather 5 that though this tra6l is full of bogs, it is as healthy as any other part of the county 5 and that it produces the fame plants as the Peak of Derby. MOORS. See Morocco. Moors, in the Me of Man, thofe who fummon the courts for the feveral (headings j fuch as the lords bai¬ liff’s. Every moor has the like office with our bailiff of the hundred. MOOSE, or Elk. See Cervus, Mammalia Index. MOOT, a difficult cafe, argued by the young bar- riffers and (Indents at the inns of court, by way of exercife, the better to qualify them for practice, and to defend the caufes of their clients. This, which is called mooting, is the chief exercife of the inns of court. Particular times are appointed for the arguing moot cafes: the place where this exercife is performed was anciently called t/ioot-hall; and there is a bailiff, or furveyor of the moots, annually chofen by the bench to appoint the moot men for the inns of chan¬ cery, and to keep an account of the performance of txercifes. The word is formed either from the Saxon vie tan, gemetan, “ meeting j” or from the French mot, “ word.” MOPSUS, in fabulous hiftory, a celebrated pro¬ phet, fon of Manto and Apollo, during the Trojan war. H e was confulted by Amphimachus, king of Colophon, who wiffied to know what fuccefs would attend his arms in a war which he was going to undertake. He pre¬ dicted the greateff calamities $ but Calchas, who had teen a foothfayer of the Greeks during the Trojan war, promifed the greateff fucceffes. Amphimachus follow¬ ed the opinion of Calchas \ but the prediction of Mop- fus was fully verified. This had fuch an effedt upon Calchas, that he died foon after. His death is attri¬ buted by fome to another mortification of the fame na¬ ture. The two foothfayers, jealous of each other’s fame, came to a trial of their (kill in divination. Cal¬ chas firft alked his antagonift, how many figs a neigh¬ bouring tree bore ? 10,000 except one, replied Mopfus, and one (ingle veffel can contain them all. The figs w'ere gathered, and his conjedtures w*ere true. Mopfus now to try his adverfary, a(ked him how many young ones a certain pregnant fow would bring forth ? Cal^ chas con felled his ignorance ; and Mopfus immediately faid that the fow7 would bring forth on the morrow ten young ones, of which only one (hould be a male, all black, and that the females (hould all be known by their white (freaks. The morrow proved the veracity of his prediction ; and Calchas died by excefs of the grief which his defeat produced. Mopfus after death was ranked among the gods, and had an oracle at Ma- lia, celebrated for the true and decifive anfwers which it gave.—Another Mopfus, fon of Ampyx and Chloris, born at Titareffa in Theffaly, He was the prophet and foothfayer of the Argonauts, and died at his re¬ turn from Colchis by the bite of a ferpent in Libya. Jafon eredled him a monument on the fea (bore, where afterwards the Africans built him a temple, where he gave oracles. He has often been confounded with the fen of Manto, as their profeflions and their names were alike. MORiEA, a genus of plants belonging to the tri- andria clafs; and in the natural method ranking under the 6th order, Enfatce. See Botany Index. MORAI, is the name given at Otaheite in the South fea to the burying grounds, w’hich are alfo places of worffiip. This is a pile of (lone railed pyramidically upon an oblong bafe or fquare 267 feet long and 87 wide. On each fide is a (light of (leps 5 thofe at the (ides being broader than thofe at the ends j fo that it terminated not in a fquare of the lame figure wdth the bafe, but in a ridge like the roof of a houfe. There w7ere 11 of thele fteps to one of thefe morais, each of which w7as 4 feet high, fo that the height of the pile w7as 44 feet •, each ftep was formed of one courfe of white coral (lone, which was neatly fquared and poliffi- ed ; the reft of the mafs (for there was no hollow with¬ in) confided of round pebbles, wffiich, from the regula¬ rity of their figure, feemed to have been wrought. The foundation was of rock ftones, which were alfo fquared. In the middle of the top flood an image of a bird carved in wTood, and near it lay the broken one of a filh carved in (lone. The whole of this pyramid made part of one fide of a fpaxious area or fquare 360 feet by 354, which was walled in with (lone, and paved with flat ftones in its whole extent. About 100 yards to the weft of this building was another paved area or court, in which were feveral fmall ftages raifed on wooden pillars aboufc^ feven feet high, which are called by the Indians ewat- tas, and feem to be a kind of altars, as upon thefe are placed provifions of all kinds, as offerings to their gods- On fome of them were feen whole hogs, and on others the fkulls of above 50, befides the (kulls of many dogs. The principal objeft of ambition among the natives is to have a magnificent morai. The male deities (for they have them of both fexes) are wmrffiipped by the men, and the female by the women •, and each have morais, to which the other fex is not admitted, though they have alfo merais common to both. MORAL PHILOSOPHY, or MORALS. MORAL PHILOSOPHY is, “ The rdence of manners or DUTY •, which it traces from man’s nature and condition, and (hows to terminate in his hap- pinefs.” In other words, it is, “ The knowledge of our DUTY and felicity $” or, “ The art of being vir¬ tuous and happy.” It is denominated an art, as it contains a fyftem of rules for becoming virtuous and happy. Whoever pra61ifes thefe rules, attains an habitual power or fa¬ cility of becoming virtuous and happy. It is likewife called a fcience, as it deduces thofe rules from th^ principles and connexions of our nature, and proves that the obfervance of them is produilive of our happi- nefs. It is an art, and a fcience of the higheft dignity, im¬ portance, and ufe. Its object is man’s duty, or his con¬ duct 357 MORAL PHILOSOPHY. Hiftory. du& in the feveral morr.1 capacities and connexions which he fuftains. Its office is to dire6t that condudl j to (how whence our obligations arife, and wffiere they terminate. Its ufe, or end, is the attainment of hap- pinefs } and the means it employs are rules for the right conduct of our moral powers. Moral Philofophy has this in common with Natural Phijofophy, that it appeals to nature or fad ; depends on obfervation j and builds its reafonings on plain un¬ controverted experiments, or upon the fulleft indudion of particulars of which the fubjed will admit. We muft obferve, in both thefe fciences, how nature is af- feded, and what her condud is in fuch and fuch cir- cumftances : Or, in other words, we muft colled the appearances of nature in any given inflance j trace thefe to fome general principles or laws of operation j and then apply thefe principles or laws to the explaining of other phenomena. Therefore Moral Philofophy inquires, not how man might have been, but how he is, conftituted : not into 'what principles or difpofitions his adions may be art¬ fully refolved, but from what principles and difpofi¬ tions they adually flow : not what he may, by educa¬ tion, habit, or foreign influence, come to be or do, but wdrat, by his nature, or original conftituent principles, he is formed to be and do. We difcover the office, ufe, or deflination of any work, whether natural or artificial, by obferving its ftrudure, the parts of which it confifts, their connexion or joint adion. It is thus we under- itand the office and ufe of a watch, a plant, an eye, or hand. It is the flare with a living creature of the ra¬ tional or brute kind. Therefore, to determine the of¬ fice, duty, or deftination of man ; or, in other words, what his bufinefs is, or what condud he is obliged to purfue; wre mufl: infped his eonftitution, take every part to pieces, examine their mutual relations one to the other, and the common effort or tendency of the whole. It has not been thus, however, that the fcience has always been taught. The earlieft moralifts did not ered fyftems upon a juff analyfis of the powers of the human mind 5 nor have all thole who thought fuch a foundation neceffary to be laid, deduced their theories from the very fame principles. As moral truths are not capable of rigid demonifration, it appears to us, that we cannot more properly introduce the fyftem which we have adopted, than by giving our readers a ftiort view of the rnofl celebrated fyflems that have been maintained by others. They will thus have an oppor¬ tunity of judging for themfelves of the refpedive me¬ rits of the different theories, and of adopting that which {hall appear to them to place pradical virtue on the fixmeft bafis. r History of the Science of Morals. Various 0- pinions Whilff there has been a remarkable agreement concerning among the writers on morality, as to the particular the cnten- a&;ons which are virtuous and thofe which are vici- tue°8tcr* ous > an(* they have uniformly taught, that it is our duty and our intereft to perform the one and to avoid the other •, they have yet differed exceedingly concerning the tef or criterion of virtue, as well as con¬ cerning the principle or motive by which men are in¬ duced to purfue it. One caufe of this difference in opinion refpeding matters of fuch univerfal import¬ ance, may perhaps be traced to the miflakes into which philofophers are apt to fall concerning the ori¬ ginal ftate of man. It is very generally taken for granted, that the firft Probable men were lavages of the loweft rank, and that the race cau.Ie t^1*s gradually civilized itfelf during the courfe of manyvariety* fucceeding ages. Without mutual intercourfe, the progrefs of civilization could never liave commenced ; and as the pradice of juftice is abfolutely neceffary to every fpecies of friendly intercourfe, thofe original fa- vages, it is fuppofed, muff have been juff in their deal¬ ings, and juff upon fome principle which has its fouiv* dation in human nature. But to develope the prin¬ ciple by which lavages are influenced in their condud, no tedious or intricate procefs of reafoning can be ne¬ ceffary. It muft have a place in every mind, and be inftantaneous in all its decifions. ITtnce it has been fuppofed, that the principle to which modern philo¬ fophers have given the name of the moral fenfe, is iti- ftindive j that it is the foie judge of virtue and vice ; and that Jts admonitions have fuch authority, as to en¬ force obedience wuthout regard to the confequences of any adion. Other philofophers, who deny that the moral fenfe is inftindive, and who yet fuppofe that the original ftate of man was favage, are forced to pile hypothefis upon hypothefis, each unnatural in itfelf, and all con- tradidory to one another, in order to account for the commencement of civilization and the formation of &- ciety. It has been fuppofed, that the defire of felf- prefervation and the love of power are the governing principles in human nature ; that in the favage ftate every man had a right to every thing which he could feize by fraud or force ; that all had an innate propen- fity to invade each other’s property ; and that hence war, rapine, and bloodlhed, prevailed univerfally, till the favages difcovered the expediency of uniting under fome form of government for their mutual protedion. But before the original ftate of man had been made the bafis of fuch oppofite theories as thefe, it would furely have been proper to inquire upon what grounds that Hate has been fuppofed to be favage. To us thefe grounds appear to be nothing better than mere ima¬ ginations ; the dreams of poets, and of fuch philofo¬ phers as bend fads to their own fyftems. In the au¬ thentic hiftory of our fpecies, there is no evidence, in¬ deed there can be no evidence, that the firft men were favages ; and every thing which we know of human nature leads us to believe, that had they been fo, the race could never have been civilized but by the mira-- culous interpofition of lome fuperior being. The only record of the earlieft ages of the world to which the fmalleft credit is due, reprefents all the nations of the earth as having fprung from one pair, and that pair as having been inftruded in their duty by their beneficent Creator. If this be the fad, and no confiftent theift can controvert it, the- precepts of morality would be originally conveyed from one generation to another; ^ not in a fyftematical or fcientific form, but as the laws Modes of of the Univerfal Sovereign, whofe authority demand- communi- ed implicit obedience. Accordingly the firft teachers of morals were men of fuperior rank, as well as of eminent talents, who formed colledions Heft mora* of iRaxims derived from theij: snceftors, “ with the lifts. view 358 MORAL PH \fements 0r Pe^e^‘ng Subordination *, poliibing manners, the Science a, educating youth. Such were the Proverbs of of Ethics. the Words of Agur, and the Wifdoni of the fon or S!rach.,, Ihefe inftru6fors did not analyze the human mind into its various faculties, and build a fydem of morals either upon a particular inftindt point¬ ing to the fupreme good, or upon the fitnefs of things diicovered by reafon. Short ifolated fentences were the mode in which they conveyed their precepts; wdiich they prefaced by obferving, that “ the fear of the Lord is the beginning of knowledge j” and enforced by the aflurance, that “ length of days, and long life, and peace, fliould they add to thofe who obeyed them.” The fayings of the celebrated wife men of Greece w^ere colle&ions of apophthegms, made in the fame manner, and delivered with fimilar views. Thales and Pytha- t Bmce's gcras f, who founded the one the Ionic and the other B-lements, the Italic fchool, made collefrions of precepts for the field’s’lli- C0nc^u<^: as we^ a ftate as °f private life. “ Neither JloryofPbi-^e crimes 110r the thoughts of bad men (faid Thales) lofophy. are concealed from the gods. The only method of be- ing juft, is to avoid doing that which we blame in others.” Of Pythagoras it is related by Porphyry and Laertius, that from Samos he repaired to Delos, x and after prefenting an offering of cakes to Apollo, there received, or pretended to receive, moral dogmas from the prieffefs; which he afterwards delivered to his difciples under the charafter of divine precepts. Among!! thefe w’ere the followung : That, “ next to gods and demons, the higheft reverence is due to pa¬ rents and legillators ; and that the laws and cuftoms of our country are to be religiouily obferved.” To thefe maxims or apophthegms, which, for the fake of delighting the ear and aiding the memory, were fometimes delivered in verfe, fucceeded, as has been fuppofed, the mode of inftru6tion by fable or al¬ legory. But the truth (eems to be, that this method of communicating moral and political wifdom w’as as ancient as the other; for we have a beautiful fpecimen of it in the ninth chapter of the book which relates the tranfaftions of the Judges of Ifrael. The fables of Efop, too, which were written at a very early period, remain lafling modes of this fpecies of art among the Greeks. When the inftruftors of mankind had proceeded thus far as to give an artificial form to their precepts they foon advanced a ftep farther, and reduced their obfervations into claffes or predicaments. Pythago¬ ras, who vifited Egypt, has been fuppofed to have learned from its priefts the method of arranging the virtues into difiind claffes. But it is the opinion of 4•Mr ifrw', &c. firft principles of virtuous condudf-which are common to all mankind, are, according to this excellent moral- ift, laws of God: and the conclufive argument by which he fupports this opinion is, that no man departs from thefe principles with impunity. “ It is fre¬ quently poftible (fays he) for men to fereen themfelves from the penalty of human laws, but no man can be unjuft or ungrateful without fuffering for his crime ; hence I conclude, that thefe laws mull have proceed¬ ed from a more excellent legiflator than man.” From this it would appear, that in the opinion of Socrates, conference, or the moral fenfe, approving of any ac¬ tion, is the criterion by which it is known to be vir¬ tuous, and the will of God that which obliges men to perform it. Socrates himfelf left no writings behind him, nor, as Origin of far as we know, offered any regular and complete theorythe Grei'k of ethics. . His difciplcs, however, who were nume-^c^s‘ ious and diftinguifhed, became the founders of the ce¬ lebrated Greek fedls. Among them the firft great queftion was, “ what are the foundations of virtue ?” and the fecond, “ what are the diftindlions betwixt good and evil, happinefs and mifery ?” The anfwers given to thefe important queftions divided the philo- fophvTs and their difciples into diftmbf orders. In aniuer to the former queftion, Plato taught *, * Enfield. that ‘ virtue is to be purfued for its own fake ; and <5 that being a divine attainment, it cannot be taught Theories but is the gift of God.” This feems to differ in no-°f Plat0’ thing, but the name, from the doctrine of thofe mo¬ derns who place the foie foundation of virtue in the approbation of the moral fenfe. The founder of the academy indeed has no fuch phrafe as moral fenfe in any _ of _ his writings with which we are acquainted ; but if virtue cannot be taught, and if it is to be pur- iued for its own fake, it muft in itfelf be good, and the objeft of fome feeling, whether called fenfe, in- Jhnfl, or pafjion. His folution of the fecond queftion agitated among the fedls is not indeed very confident with this neceffary inference from his anfwer to the ’ firft; but for his inconfiftencies we are not account¬ able. “ Our higheft good (he fays) confifts in the contemplation and knowledge of the firft good, which is mind or God ; and all thofe things which are called good by men, are in reality fuch only fo far as they are derived, from the firft and higheft good. The only power in human nature which can acquire a refem- blance to the fupreme good, is reafon ; and this re- emblance confifts in prudence, juftice, fandlity, and temperance.” Ariftotle, the founder of the Peripatetic fchool, wasof Anlto- the pupil of Plato ; but of the two great moral quef-tle, Dons.he gives folutions fomewhat different from thofe of his mafter. “ Virtue (according to him J) is ei-t EnfeldL ther.theoretical or practical. Theoretical virtue con¬ fifts in the due exercife of the underftanding ; pradlical, in the purfuit of what is right and good. Practical vir¬ tue is acquired by habit and exercife.” This theory feems to differ little from that adopted by Cudworth, Clarke, and Price, whien fhall be confidered afterwards. With 359 Hiftory. MORAL PH With refpefl to happinefs or good, the doftrine of Ariffotle is very rational. “ Pleafures (he fays) are effentially different in kind. Difgraceful pleafures are wholly unworthy of the name. The purelt and nobleft pleafure is that which a good man derives from virtu¬ ous actions. Happinefs, which confifls in a conduct conformable to virtue, is either contemplative or ac¬ tive. Contemplative happinefs, which confifls in the purfuit of knowledge and wifdom, is fuperior to adlive happinefs, becaufe the underflanding is the higher part of human nature, and the objedts on which it is em¬ ployed are of the nobleft kind. The happinefs which arifes from external poffefiions is inferior to that which arifes from virtuous adtions j but both are neceffary to > produce perfedt felicity.” 8 The Stoics, another celebrated fedt of Greek phi- efthe lofophers, maintained *, that “ nature impels every ^tpCS’ , man to purfue whatever appears to him to be good.” J ‘ ‘ According to them, “ felf-prefervation and defence is the firft law of animated nature. All animals necef- farily derive pleafure from thofe things which are fuit- ed to them j but the firft objedt of purfuit is, not plea¬ fure, but conformity to nature. Every one, there¬ fore, who has a right difcernment of what is good, will be chiefly concerned to conform to nature in all his adtions and purfuits. This is the origin of moral obligation.” With refpedt to happinefs or good, the Stoical dodtrine was altogether extravagant: They taught, that “ all external things are indifferent, and cannot affedt the happinefs of man ; that pain, which does not belong to the mind, is no evil; and that a wife man will be happy in the midft of torture, becaufe virtue itfelf is happinefs (a).” As the Stoics held that there is but one fubftance, partly adlive and partly paflive, in the univerfe (fee Metaphysics, N° 261, 262), and as they called the adlive principle God, their dodlrine, which makes vir¬ tue conlift in a conformity to nature, bears no fmall refemblance to that of thofe moderns who reft moral obligation on the Divine will. It was therefore on better grounds than has been fometimes fuppofed, that Warburton, when cbaradlerizing the founders of } D/i> I^eg t^ie th1"66 principal fedls in Greece, reprefented J Plato of Mops. as the patron of the moralfenfe; Arijlotle, of the effen- tial differences ; and Zeno, of arbitrary will. Thefe principles, when feparated from each other, and treated in the manner of the ancients, may not each be able to bear the fuperftrudlure which wras raifed upon it ; but the principles of moft of the other fedls were much lefs pure, and infinitely more dangerous. $ 'Eternal Cudworth $, whofe teftimony wmen relating the and immu- dodtrines of antiquity is entitled to the fulleft credit, tralit^°~ aff*rrns> that Ariftippus the founder of the Cyrenaic 9 fchool, Derriocritus, and Protagoras, with their follow- of Anftip- ers among the atomills, taught, that “the diftindtion Pus> Demo- between virtue and vice is merely arbitrary ; that no- cntus, ai d thing is juft «>r unjuft, facred or profane, but as it is ° ’ agreeable or contrary to ellablilhed laws and cuftoms ; IL o s o P H Y. that what is juft to-day, hirnian authority may make unjuft to-morrow ; and that prefent pleafure is the fo- vereign good of man.” 10 With thefe impieties, the moral dodtrines of Epi-and °f Epi¬ curus have very unjuftly been confounded. The phy-cumf* fical and metaphyfical fyftems of that philofopher are indeed ftrange compofitions of ingenuity and abfurdity, truth and falfehood ; and the moral precepts of many of his follow’ers were in the higheft degree licentious and impure. But his own life was exemplary; and his ethical fyftem, if candidly interpreted, is much more rational than that of the Stoics; though it muft be confefied, that no fedl produced men of more deter¬ mined virtue than the fchool of Zeno. According to Epicurus *, “ the end of living, or the ultimate * EnfielcCr good which is to be fought for its owm fake, is hap- Hifiory. pinefs. The happinefs which belongs to man, is that ftate in which he enjoys as many of the good things, and fuffers as few of the evils incident to human na¬ ture as poflible; palling his days in a fmooth courfe of tranquillity. Pleafure is in its own nature good, as pain is in its nature evil. The one is therefore to be purfued, and the other to be avoided, for its own fake. Pleafure and pain are not only good and evil in themfelves, but they are the meafure of what is good or evil in every abjeft of delire and averfion ; for the ultimate reafon w’hy we purfue one thing and avoid another is, becaufe we expedl pleafure from the former, and apprehend pain from the latter.—That pleafure, however, rvhich prevents the enjoyment of a greater pleafure, or produces a greater pain, is to be Ihunned ; and that pain which either removes a greater pain, or procures a greater pleafure, is to be endured.” Upon thefe felf-evident maxims, Epicurus builds his fyftem of ethics ; and proves, with great force of ar¬ gument, “ that a Heady courfe of virtue produces the greateft quantity of happinefs of which human nature is capable.” Without a prudent care of the body, and a Heady government of the mind, to guard the one from difeafes and the other from the clouds of prejudice, happinefs is unattainable. By temperance we enjoy pleafure, without fuffering any confequent inconveni¬ ence. Sobriety enables us to content ourfelves with Ample and frugal fare. Gentlenefs, as oppofed to an irafcible temper, greatly contributes to the tranquillity and happinefs of life, by prefevving the mind from perturbation, and arming it againft the alfaults of ca¬ lumny and malice. Fortitude enables us to bear thofe pains which prudence cannot Ihun, and banilhes fear from the mind ; and the practice oijiflice is abfolutely neceilary to the exiftence of fociety, and by confe- quence to the happinefs of every individual.” Thefe reafonings come home to every man’s bofom ; and had not this philofopher, by denying the providence, if not the being, of God, moft unhappily excluded from his fyftem the very poflibility of a future ftate of re¬ tribution, his moral philofophy would have 'been the moft rational, and of courfe the moft ufeful, of anv thai (a) Since this fhort hiftory was written, a very pleafing view of Stoicifm has been giyen to the public in Fergufon’s Principles of Moral and Political Science ; a work which the ftudent of ethics will do well to confult. Perhaps the amiable author may unintentionally have loftened the auftere dogmas of the Porch, by transfufing in¬ to them fomething of the mild fpirit of the gofpel; but, if fo, he has much improved the fyftem of Zenoa 3<5o II The eclec¬ tic philofo- phers of Alexan¬ dria. 12 Extinction and revival of moral fcience in Europe. *3 Theories «f Hobbes, MORAL PHILOSOPHY. Hiftory. that was taught in the fchools of Greece. This enor¬ mous defect, however, laid it open to the groffell cor¬ ruptions 5 and by his followers it was in fadt corrupted fo as to countenance the mod impure and criminal pleafures of fenfe. Thefe feveral fyftems of ethics continued to be cul¬ tivated wfth more or lefs purity through all the revo¬ lutions of the Grecian dates, and they were adopted by the Romans after Greece itfelf became a province of the empire. They had been introduced into Egypt during the reigns of the Ptolemies, and were taught with much celebrity in the fchools of Alexandria.— The philofophy which was mod cultivated in thofe fchools was that of Plato ; but from a dedre of uni¬ formity which took poffefTion of the Alexandrian Pla- tonids, many of the dogmas of Aridofle and Zeno, as well as the extravagant fidlions of the ead, were in¬ corporated with the principles of the old academy.— The patrons of this heterogeneous mafs have been call¬ ed ecleBic philofophers, becaufe they profeffed to felefl from each fydem thofe dofrrines which were rational and important, and to rejeft every thing which was falfe or futile •, but they added nothing to the purity of Plato’s ethics, and they increafed the obfcurity and my- fticifm of his phyfics and metaphyfics. After the fubverfion of the Roman empire, every fpecies of philofophy, if fyllogidic wrangling deferve not that name, was banifhed for ages from the fchools ofjEurope ; and ethics, properly fo called, gave place to ecclefiadical cafuidry, and to the dudy ®f the civil and canon law. When the Greeks, whom the fury and fanaticifm of Mahomet II. had driven from Condanti- nople, introduced into Italy the knowledge of their own language, the cabinets of ancient philofophy were again unlocked •, the fydems of the different.fe&s were adopted with the utmod avidity/} and, without ac¬ curate invedigation of their refpe&ive merits, men be¬ came Platonids, Peripatetics, or Stoics, as fancy or caprice prompted them to choofe their leaders. The of Aridotle, in particular, had not lefs autho¬ rity over his modern admirers than it had of old in the Lyceum at Athens. At length the fpirit of Luther and the genius of Bacon broke thefe fetters, and taught men to think for themfelves as well in fcience as in religion. In phyfics, the effetts produced by the writ¬ ings of Bacon wTere great and rapid } for in phyfics the ancient theories were totally and radically wrong.— With refpeft to morals, however, the cafe was differ¬ ent. Each of the celebrated fchools of antiquity was in poffeffion of much moral truth, blended indeed with error : and long after the Stagyrite and his rivals had lod all influence in phyfical fcience, philofophers of eminence followed them implicitly in the fcience of ethics. At this day, indeed, there is hardly a theory of mo¬ rals at all diftinguifhed, to w’hich fomething very fimilar may not be found in the writings of the ancients.— Hobbes adopted the principles of Democritus and Protagoras, and taught exprefsly that “ there is no criterion of juflice or injudice, good or evil, befides the laws of each ftate j and that it is abfurd to inquire at any perfon except the eftablilhed interpreters of the the law, whether an a£Hon be right or wrong, good or evil (b).” Thefe impious abfurdities have been often confuted. Cud worth, who compofed his True Intel¬ lectual Syltcm of the Univerfey in order to trace the meta- phyfical atheifm of Hobbes to its fource, and to ex- pofe it to the public in all its wTeaknefs, undertook likewife to overthrow his ethical fyftem, in a treatife, entitled Of Eternal and Immutable Morality. That work was left unfinifhed } but the theory of its great author was adopted, illufirated, and very ably fupport- ed, by the doctors Clarke and Price. According to thefe three admirable fcholars, “ we 0f feel ourfelves irrefiftibly determined to approve fome worth, afiions, and to difapprove others. Some aftions we Clarke, ^ cannot but conceive of as and others as ; anc^ I>nc€*. and of all aftions we are led to form fome idea, as ei¬ ther ft to be performed or unfit, or as neither fit nor unfit to be performed, i. e. as indifferent. The pow-er within us which thus perceives and determines, they declare to be the underjfanding ; and they add, that it perceives or determines immediately or by intuition, becaufe right and wrong denote fimple ideas. As there are fome propofitions, which when attended to necef- farily determine all minds to believe them, fo are there fome adlions whofe natures are fuch, that when obferv- ed, all rational beings immediately and neceffarily ap¬ prove them. He that can impartially attend, it is laid, to the nature of his own perceptions, and determine that when he conceives gratitude or beneficence to be right, he perceives nothing true of them, or underflands no¬ thing, but only fujfers from a fenfe, has a turn of mind which appears unaccountable : for the more we ex¬ amine, the more indifputable it will appear to us, that we exprefs necefffary truth, w'hen we fay of fome adlions that they are right, and of others that they are wrong.” It is added, that “ we cannot perceive an aftion to be right without approving it, or approve it without being confcious of fome degree of fatisfaBion and compla¬ cency } that we cannot perceive an adlion to be wrong without difapproving it, or difapprove it without being difpteafed with it j and that the fiffl muff be liked, the lajl difliked ; the firfi loved, the lafil hated.” By the patrons of this fyftem, obligation to aftion, and rightnefs of aflion, are held to be coincident or identical. “ Vir- ture, they affirm, has a real, full, obligatory power, an¬ tecedently to all laws, and independently of all will } for obligation is involved in the very nature of it. To affirm that the performance of that which to omit would be wrong is not obligatory, unlefs conducive to private good, or enjoined by a fupericr power, is a mani- feii contradiffion * * Price's Few men have deferved better of letters and philo- Review, fophy than Cud worth, Clarke, and ’Price} and yet an natural afftfiion, and the like. Of the private paf- fions (d), fome refped merely the fecurity and defence, of the creature, fuch as refentment and fear; whereas others MOkAL PHILOSOPHY. (d) Here we ufe pafuens and affedions without diftindion. Their difference will be marked afterwards. Part I. MORAL PHILOSOPHY. 3« Public paf- fyns. otliers aim at fomepojltive adrantage or good, as wealth, eafe,fame. The former fort, therefore, becaufe of this difference of objects, may be termed defenjive paflions. Thele anfvver to our dangers, and prompt us to avoid them if we can, or boldly to encounter them when we cannot. The other clafs of private paflions, which purfue private pojitive good, may be called appetitive. How¬ ever, we fhall ftill retain the name of private in con- tradiflin&ion to the defenjive paflions. Man has a great variety of wants to fupply, and is capable of many enjoyments, according to the feveral periods of his life, and the different fituations in which he is pla¬ ced. To thefe therefore a fuitable train of private paf- fions correfpond, which engage him in the purfuit of whatever is necelfary for his fubfiftence or welfare. Our public or facial affe&ions are adapted to the fe- vcral facial connexions and relations which we bear to Others, by making us fenfible of their dangers, and in- terefting us in their wants, and fo prompting us to fe- Cure them againft one and fupply the other. This is the firfl: ftep then to difcover the duty and dejlination of man, the having analyzed the principles of which he is compofed. It is neceffary, in the next place, to confider in what order,proportion, and meafure, of thofe inward principles, virtue, or a found moral temper and right condudt, confifts j that we may dif¬ cover whence moral obligation arifes. Chap. II. O^Duty, or Moral Obligation. 360 37 '‘The' mea- lx is by the end or defign of any power or movement fure of tlurt we muft direct its motions, and effimate the degree powers. of force neceffary to its juft aftion. If it wTant the force requifite for the obtaining its end, we reckon it defec¬ tive j if it has too much, fo as to be carried beyond it, we fay it is overcharged j and in either .cafe it is im¬ perfect and ill contrived. If it has juft enough to reach the fcope, we' efteem it right and as it ftiould be. 38 Let us apply this reafoning to the paflions. Meafure of The defence and fecurity of the individual being the fvve paf-1* a^m t^ie defenfive pajfions, that fecuritij and defence |^ns> muft be the meafure of their frength or indulgence. If they are fo weak as to prove infufticient for that end, or if they carry us beyond it, i. e. raife unneceflary com¬ motions, or continue longer than is needful, they are unfit to anfwer their original deiign, and therefore are in an unfound and unnatural (late. The exercife of fear or of refentment has nothing defirable in it, nor can we give way to either without painful fenfations. Without a certain degree of them, we are naked and expofed. With too high a proportion of them, we are miferable, and often injurious to others. Thus cowardice or timidity, which is the excefs of fear, in- ftead of faving us in danger, gives it too formidable an appearance, makes us incapable of attending to the beft means of prefervation, and difarms us of courage, our natural armour. Fool-hardinefs, which is the rvant of a due meafure of fear, leads us heedlefsly into dan¬ ger, and lulls us into a pernicious fecurity. Revenge, i. e. excejjive refentment by the violence of its commo tion, robs us of that prefence of mind which is often the beft £uard againft injury, and inclines us to purfue the aggtetTb> with more feverity than felf-defence requires. Tufllanimity, or the want of a juft indignation againft wrong, leaves us quite unguarded, and tends to fink Of Moral the mind into a paflive enervated tamenefs. There- QbllSatl0ff,f fore, “ to keep the defenfive paflions duly propor- “ tioned to our dangers, is their natural pitch and te- nor.” ^ The private paflions lead us to purfue fome poftivc Meafure of fpecies of private good : that good therefore which is the private the objeCl and end of each muft be the meafure of their pa 10 refpeClive force, and direCl their operation. If they are too weak or fuggifh to engage us in the purfuit of their feveral obje&s, they are evidently deficient; but if they defeat their end by their impetuojity, then are they drained beyond the juft tone of nature. Thus vanity, or an excejjive pajjion for applaufe, betrays into fucb meanneffes and little arts of popularity, as make us forfeit the honour we fo anxioufly court. On the other hand, a total indifference dbout the ejleem of man-, kind, removes a ftrong guard and fpur to virtue, and lays the mind open to .the moft abandoned profecutions. Therefore, “ to keep our private paflions and defires pro¬ portioned to our wants, is the juft meafure and pitch of this clafs of affeCtions.” 4# The defenfve and private paflions do all agree in Compara* general, in their tendency or conduciveneis to the in-tive forc<^‘ terert o«r good of the individual. Therefore, when there is a collifion of intereft, as may fometimes hap¬ pen, that aggregate of good or happinefs, which is com¬ pofed of the particular goods to which they refpec- tively tend, muft be the common ftandard by wdiich their comparative degrees of ftrength are to be meafured: that is to fay, if any of them, in the degree in which they prevail, are incompatible with the greateft aggre¬ gate of good or moft extenfive intereft of the indivi¬ dual, then are they unequal and difproportionate. For in judging of a particular fystem or conjlitution of powers, we call that the fupreme or principal end, in w’hich the aims of the feveral parts or powers coincide, and to- which they are fubordinate ; ancffteckon them in due proportion to each other, and right with regard to the whole, when they maintain that fubordination of fub- ferviency. Therefore, “ to proportion our defenfive and private paflions in fuch meafure to our dangers and wants as beft to fecure the individual, and obtain the greateft aggregate of private good or happinefs, is their juft balance or comparative ftaii jard in cafe of competition.” ^ In like manner as the public or facial affeClions point Meafure at the good of others, that good muft be the meafure the P?bIic of their force. When a particular affeCtlon, as gratitude or friendfhip, which belongs to a particular focial connexion, viz. that of a bencfaOtor or of a friend, is too feeble to make us act the grateful or friendly part, that affeCtion, being infuflicient to anfwer its end, is defective and unfound. If, on the other hand, a parti¬ cular palfion of this clafs counteract or defeat the inte¬ reft it is defigned'-to promote, by its violence or dif- proportion, then is that paflion exeejjive and irregular. Thus natural ajfe&ion, if it degenerates into a pefionate fondnefs, not only hinders the parents from judging coolly of the intereft of their offspring, but often leads them into a moft partial and pernicious indul¬ gence. ' . 4* • As every kind affeCtion points at the good of its Collifi0" of- particular objeCt, it is poflible there may fometimes be^aI a. coDifion of interefts or goods. Thus the regard due 368 Of Moral Obligation MORAL PHILOSOPHY. Jalance of affedlion. 44 (Limits of private af- fe&ions. to a friend may interfere with that which we owe to • a community. In fuch a competition of interefts, it is evident that the greatejl is to be chofen ; and that is the greatell intereft which contains the greateft fum or a£8regate public good, greateft in quantity as well as duration. This then is the common Jiandard by which the refpedtive forces and fubordinations of the focial affections muft be adjufted. Therefore we conclude that “ this clafs of affeCtions are found and regular when they prompt us to purfue the intereft of indivi¬ duals in an entire confiftency with the public good f or in other words, “ when they are duly proportioned to the dangers and wants of others, and to the va¬ rious relations in which we ftand to individuals or to fc- cietij.^ Thus we have found, by an induction of particulars, the natural pitch or tenor of the different orders of af'ec- tion, confidered apart by themfelves. Now, as the vir¬ tue or perfection of every creature lies in following its nature, or aCHng fuitably to the juft proportion and harmony of its feveral powers ; therefore, “ the vir¬ tue of a creature endowed with fuch affeftions as man muft confift in obferving or aCHng agreeably to their natural pitch and tenor 1'' But as there are no independent affeClions in the fabric of the mind, no paffion that ftands by itfelf, without fome relation to the reft, we cannot pronounce of any one, conftdered apart, that it is either too ftrong or too weak. Its ftrength and juft proportion muft be meafured not only by its fubferviency to its own im¬ mediate end, but by the refpeCt it bears to the whole fyftem of affeClions. Therefore we fay a paftion is too ftrong, not only wTen it defeats its own end, but when it impairs the force of other pafllons, which are equally neceffary to form a temper of mind fuited to a certain economy or fate; and too weak, not merely on account of its infufficiency to anfwer its end, but becaufe it cannot fuftain its pa t or office in the balance of the whole fyftem. Thus the love of life may be too fron% when it takes from the regard due to one’s country, ®nd will not allow one bravely to encounter dangers, or even death, on its account. Again, The love of fame may be too weak when it throws down the fences which render virtue more fecure, or weakens ‘the incentives which make it more aClive and public fpirited. If it be alked, “ How far may the affe&ions towards private good or happinefs be indulged ?” One limit was before fixed for the particular indulgence of each, viz. their fubordination to the common aggregate of good to the private fyftem. In thefe therefore a due regard is always fuppofed to be had to health, reputa¬ tion, fortune, the freedom of a El ion, the unimpaired exer- cfe °f reafon, the calm enjoyment of one's felf which are all private godds. Another limit now refults from the balance of affedlion juft named, viz. “ The fecurity and happinefs of others or, to exprefs it more gene¬ rally, “ a private affedtion may be fafely indulged, when, by that indulgence, we do not violate the obli¬ gations which refult from our higher relations or public connexions.” . A juft refpeft therefore being had to thefe boundaries which nature has fixed in the breart of every man, what fhould limit our purfuits of private happinefs ? Is nature fullen and penurious ? or, does Part I the God of nature envy the happinefs of his off- Of Moral fpring ? Obligation. Whether there is ever a real collifion of xntereffs v J between the public and private fyftem of affeftions, or Collifion of the ends which each clafs has in view, will be after-interefts. wards confidered ; but where there is no collifion, there is little or no danger of carrying either, but efpecially the public affedfions, to excefs, provided both kinds are kept fubordinate to a difereet and cool felf- love, and to a calm and unive'rfal benevolence, which principles ftand as guards at the head of each fyftem. 45 This then is the conduct bf the paflions, confidered as particular and fparate forces, carrying us out to their refpedtive ends j and this is their balance or economy, confidered as compoundpowers, or powers mutually re¬ lated, adting in conjundtion towards a common end, and confequently as forming a fystetn or whole. ^ Now, whatever adjufts or maintains this balance whatever in the human conftitution is formed for di-tl0n reeling the paffions fo as to keep them from defeating Powers* their own end or interfering with each other, muft be a principle of a fuperior nature to them, and ought to diredt their meafures and govern their proportions. But it was found that reafon or refledtion is fuch a principle, which points out the tendency of our paf¬ fions, weighs their influence upon private and public happinefs, and (hows the beft means of attaining either. It having been likewife found that there is another direfting or controlling principle, which we call con¬ science or the MORAL SENSE, which, by a native kind of authority, judges of affedlions and adtions, pronoun¬ cing [ovaejuf and good, and others unjuf and ill; it follows, that the paffions, which are mere impulfe or blind forces, are principles inferior and fubordinate to this judging faculty. Therefore, if we would follow the order of nature, i. e. obferve the mutual refpedls and the fubordination which the different parts of the human conftitution bear one to another, the paffions ought to be fubjedted to the diredtion and authority of the leading or controlling principles. ^ We conclude, therefore, from this induElion, that In what it the confutation or juft economy of human nature confifts0011^5* in a regular fubordination of the paftions and affeEtions to the authority of conftcience and the dircElion of rea¬ fon. That fubordination is regular, when the proportion Economy of formerly mentioned is maintained; that is to fay, nature or “ when the defenfve paflions are kept proportioned n^t tem* to our dangers; when the private paffions are propor-1**' tioned to our wants; and when the public affedlions are adapted to our public connexions, and proportioned to the wants and dangers of others.” But tht natural fate, or the found and vigorous co/z-Human fitution o; any creature, or the juft economy of its virtue and powers, we call its health and perfeElion; and the adling perfection, agreeably to theie, its virtue or goodnefs. Therefore, “ the health and perfeElion of man muft lie in the aforefaid fupremacy of confcience and reafon, and in the fubordination of the paflions to their authority and di- reElion. And his virtue ox goodnefs muft confift in adt- ing agreeably to that order or economy." That fuch an ornament of the mind, and fuch ahowcon- condudl of its powers and paffions, will ftand the tefttormal?!e of reafon, cannot admit of any difpute. For, upon at