V i . 1 d n \ i •*rt ■ ' 2: \ Encyclopaedia O R, A D I C T B RITANNICA; I O N A R Y O F ARTS, SCIENCES, AND MISCELLANEOUS LITERATURE.; Conftrudted on a Plan, BY WHICH THE DIFFERENT SCIENCES AND ARTS Are cligefted into the Form of Diftind TREATISES or SYSTEMS, COMPREHENDING The H i s t o r y, Theory, and Practice, of each, according to the Lateft Difcoveries and Improvements; and full EXPLANATIONS given of the VARIOUS DETACHED PARTS OF KNOWLEDGE, WHETHER RELATING TO Natural and Artificial Objeds, or to Matters Ecclesiastical, Civil, Military, Commercial, &c. 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XVIII. 1NDOCT1 DISCAN-F, e-t a ment me mj niss f. periti. EDINBURGH. PRINTED FOR A. BELL AND C. MACFARQU H AR> MDCCXCVIL Encyclop^d i Britannic a. S T R Strength of STRENGTH of materials, in mechanics, is a fub- i at^ria V3 of fo much importance, that in a nation fo emi- ! nent as this for invention and ingenuity in all fpecies Importance of mamifa&ures, and in particular fo diftinguifhed for of the fub- jts improvements in machinery of every kind, it is fome- what fingular that no writer has treated it in the detail which its importance and difficulty demands. The man of fcience who vifits our great manufactures is delighted with the ingenuity which he obferves in every part, the in¬ numerable inventions which come even from individual arti- fans, and the determined purpofe of improvement and re¬ finement which he fees in every worklhop. Every cotton \ mill appears an academy of mechanical fcience ; and mecha¬ nical invention is fpreading from thefe fountains over the whole kingdom : But the philofopher is mortified to fee this ardent fpirit fo cramped by ignorance of principle, and many of thefe original and brilliant thoughts obfcured and clogged with needlefs and even hurtful additions, and a com¬ plication of machinery which checks improvement even by its appearance of ingenuity. There is nothing in which this want of fcientific education, this ignorance of principle, is fo frequently obferved as in the injudicious proportion of the parts of machines and other mechanical ftru&ures; pro¬ portions and forms of parts in which the ftrength and pofi- tion are nowife regulated by the (trains to which they are expofed, and where repeated failures have been the only leffons. It cannot be otherwife. We have no means of inltruc- tion, except two very fhort and abftrafted treaties of the late Mr Emerfon on the Itrength of materials. We do not recoiled a performance in our language from which our ar- tifis can get information. Treatifes written exprefsly on different branches of mechanical arts are totally filent on this, which is the bafis and only principle of their perform¬ ances. Who would imagine that Price’s British Car- penter, the work of the firfi; reputation in this country, and of which the foie aim is to teach the carpenter to eredt folid and durable ftrudures, does not contain one propofi- tion or one reafon by which one form of a thing- can be drown to be ttronger or weaker than another ? We doubt ver7 m«ch if one carpenter in an hundred can give a reafon to convince his own mind that a joiff is ftronger when laid on its edge than when laid on its broad fide. We fpeak in this firong manner in hopes of exciting fome man of fcience ^s to publifli a fyftem of inftru&ion on this fubjed. The li¬ mits o( our Work will not admit of a detail : but we think it neceffary to point out the leading principles, and to give the traces of that fyHematic connedlion by which all the knowledge already poffeffed of this fubjed may be brought together and properly arranged. This we (hall now attempt m as brie( a manner as we are able. Strength of materials The ftrength of materials arifes immediately or ultimate- ” 7 ,f!°m coheBan of the P"5 of Wks. Our esamiua. •ohefiM. Voi. XVIII, Part I. V "x. S T R tion of this property of tangible matter has as yet been very Strength partial and imperfed, and by no means enables us to apply Matena^ mathematical calculations with precilion and fticcefs. The v ” various modifications of cohefion, in its different appear¬ ances of perfed foftnefs, plafticity, dudility, elafticity, hard- nefs, have a mighty influence on the ftrength of bodies, but are hardly fufceptible of meafurement. Their texture alfo, whether uniform like glafs and dudile metals, cryftallized or granulated like other metals and freeftone, or fibrous like timber, is a circumftance no lef* important; yet even here, although we derive fome advantage from remarking to which of thefe forms of aggregation a fubftance belongs, the aid is ^ but fmall. All we can do in this want of general principles Experi- is to make experiments on every clafs of bodies. Accord-ments ^ ingly philofophers have endeavoured to inftmd the public in this particular. The Royal Society of London at its very firft inftitution made many experiments at their meet¬ ings, as may be icen in the firft regifters of the Society f. f See Several individuals have added their experiments. The moft numerous colledion in detail is by Mufchenbroek, profeffor natural philofophy at Leyden. Part of it was publifhed by Mathem*. himfelf in his Effais de Phyfique, in 2 vols qto ; but the fulltlc.d ColUe* colledion is to be found in his Syftem of Natural Philofo-*,sw* phy, publifhed after his death by Lulofs, in 3 vols 4to. This was tranflated from the Low Dutch into French by Sigaud de la Fond, and publifhed at Paris in 1760, and is a prodigious colledion of phyfical knowledge of all kinds, and may al- moft fuffice for a library of natural philofophy. But this colledion of experiments on the cohefion of bodies is not of that value which one expeds. We prefume that they were carefully made and faithfully narrated ; but they were made on fuch fmall fpecimens that the unavoidable natural inequa¬ lities of growth or texture produced irregularities in the rc« fults which bore too great a proportion to the whole quan¬ tities obferved. We may make the fame remark on the ex¬ periments of Couplet, Pitot, De la Hire, Du Hamel, and others of the French academy. In fhort, if we except the experiments of Buffon on the ftrength of timber, made at the public expence on a large fcale, there is nothing to be met with from which we can obtain abfolute meafures which may be employed with confidence ; and there is nothing in the Englifh language except a Ample lift by Emerfon, which is merely a fet of affirmations, without any narration of cir- cumftances, to enable us to judge of the validity of ills epo- clufions; but the charader of Mr Emerfon, as a man of knowledge and of integrity, gives even to thefe affertions a confiderable value. But to make ufe of any experiments, there muft be employed Rendered fome general principle by which we can generalize their re- by fults. They will otherwife be only narrations of detached ®eiiera^zaa fads. We muft have fome notion of that intermedium, by 1 the intervention of which an external force applied to one part of a lever, joift, or pillar, occafionsa (train on a diftaut part. This can be nothing hut the cohelion between the A parts. Strength of Materials. 5 Stiength tidiued. 6 Caufes known on¬ ly from their ef¬ fects. All bodies cl aide. S T R r « parts. It is this connecting force which is brought into a&ion, or, as we more fiiortly exp refs it, excited. This ac¬ tion is modified in every part by the laws of mechanics. It is this action which is what we call the firength of that part, and its effeCt is the {train on the adjoining parts ; and thus it is the fame force, differently viewed, that constitutes both the {train and the ftrength. When we confider it in the light of a refiftance to fracture, we call it jlrength. We call every thing a force which we obferve to be ever accompanied by a change of motion ; or, more ftrictly fpeaking, we infer the prefence and agency of a force where¬ ver we obferve the ftate of things in refpeCt of motion dif¬ ferent from what we know to be the refult of the aCtion of all the forces which we know to a6t on the body. Thus when we obferve a rope prevent a body from falling, we in¬ fer a moving force inherent in the rope with as much confi¬ dence as when we obferve it drag the body along the ground. The immediate aftion of this force is undoubtedly exerted between the immediately adjoining parts of the rope. The immediate effeCl is the keeping the particles of the rope to¬ gether. They ought to feparate by any external force drawing the ends of the rope contrarywife; and we aferibe their not doing fo to a mechanical force really oppofing this external force. When defired to give it a name, we name it from what we conceive to be its effett, and therefore its charafteriiiic, and we call it cohesion. This is merely a name for the fadf; but it is the fame thing in all our deno¬ minations. We know nothing of the caufes but in the ef¬ fects ; and our name for the caufe is in faft the name of the effe£t, which is cohesion. We mean nothing elfe by gra¬ vitation or magnetifm. What do we mean when we fay that Newton underftood thoroughly/the nature of gravita¬ tion, of the force of gravitation; or that Franklin underftood the nature of the eledtric force? Nothing but this: Newton confidered with patient fagacity the general fads of gravi¬ tation, and has deferibed and claffed them with the utmoft precifion. In like manner, we fhall underhand the nature of cohefion when we have difeovered with equal generality the laws of cohefion, or general fa£ts which are obferved in the appearances, and when we have deferibed and claffed them with equal accuracy. Let us therefore attend to the more fimple and obvious phenomena of cohefion, and mark with care every circum- flance of refemblance by which they may be claffed. Let us receive thefe as the laws of coheffon, charaderiftic of its fuppofed caufe, the force of cohefion. We cannot pretend to enter on this va!l refearch. The modifications are in¬ numerable ; and it would require the penetration of more than Newton to deted the circumflance of fimilarity amidfl millions of diferrminating circumftances. Yet this is the on¬ ly way of difeovering which are the primary fads charac- teriftic of the force, and which are the modifications. The lludy is immenfe, hut is by no means defperate; and we en¬ tertain great hopes that it will ere long be fuccefsfully pro- fecuted : but, in our particular predicament, we mull con¬ tent ourfelves with feleding fuch general laws as ieem to give us the moft immediate information of the circumftances that muft be attended to by the mechanician in his conftruc- tions, that he may unite ftrength with fimplicity, economy, and energy. i/?,Then, it is a matter of fad that all bodies are in a cer¬ tain degree perfedly elaftic ; that is, when their form or bulk is changed by certain moderate comtoreffions or diftrac- tions, it requires the continuance of the changing force to continue the body in this new Rate ; and when the force is removed, the body recovers its original form. We limit the affertion to certain moderate changes : For inftance, take a lead wire of ijth of inch in diameter and ten feet 1 S T R long ; fix one end firmly to the ceiling, and let the wire Strertgtk ef hang perpendicular; affix to the lower end an index like the ^a'er‘ah. hand of a watch ; on fome ftand immediately below let there 1 -1 be a circle divided into degrees, with its centre correfpond- ing to the lower point of the wire : now turn this index twice round, and thus twift the wire. When the index is let go, it will turn backwards again, by the wire’s untwift- ing itfelf, and make almoft four revolutions before it flops; after which it twifts and untwiils many times, the index go¬ ing backwards and forwards round the circle, diminilhing however its arch ot twift each time, till at laft it fettles pre- cifely in its original pofition. This may be repeated for ever. Now, in this motion, every part of the wire partakes equal¬ ly of the twift. The particles are ftretched, require force to keep them in their ftate of extenfion, and recover com¬ pletely their original relative pofitions. Thefe are all the charafters of what the mechanician calls perfed elafticity, This is a quality quite familiar in many cafes ; as in glafs, tempered Reel, &c. but was thought incompetent to lead, which is generally confidered as having little or no elafticity. But we make the affertion in the moil general terms, with the limitation to moderate derangement of form. We have made the fame experiment on a thread of pipe-clay, made by forcing foft clay through the fmall hole of a fyringe by means of a ferew ; and we found it more elaftic than the lead wire : for a thread of -ig-th of an inch diameter and 7 feet long allowed the index to make two turns, and yet com¬ pletely recovered its firft pofition. 2d/y, But if we turn the index of the lead wire four times round, and let it go again, it untwifts again in the fame manner, but it makes little more than four turns back again ; and after many ofcillations it finally flops in a pofi¬ tion aimoft two revolutions removed from its original po/i- tion. It has now acquired a new arrangement of paits, and this new arrangement is permanent like the former; and, g ! what is of particular moment, it is perfe&ly elaflic. This What is change is familiarly known by the denomination of a set.nie3ntby The wire is laid to have taken a set. When we attend3A** minutely to the procedure of nature in this phenomenon, we find that the particles have as it were Aid on each other, flill cohering, and have taken a new pofition, in which their connedling forces are in equilibrio : and in this change of relative fituation, it appears that the connefh’ng forces which maintained the particles in their firit fituations were not in equilibrio in fome oofition intermediate between that of the firft and that of the iaft form. The force required for changing this firft form augmented with the change, but only to a certain degree ; and during this procefs the con- nefting forces always tended to the recovery or this firft form. But after the change of mutual pofition has paffed a certain magnitude, the union has been partly deftroyed, and the particles have been brought into new fituations ; fuch, that the forces which now conneft each with its neighbour tend, not to the recovery of the firft arrange¬ ment, but to pufh them farther from it, into a new fitua¬ tion, to which they now verge, and require force to prevent them from acquiring. The wire is now in fail again per¬ fectly elaftic ; that is, the forces which now conned the particles with their new neighbours augment to a certain degree as the derangement from this new pofition augments. This is not reafoning from any theory. It is narrating fails, on which a theory is to be founded. What we have been juft now faying is evidently a defeription of that fen- ^ fible form of tangible matter which we call duBilhy. It has Duililitf every gradation of variety, from the foftnefs of butter to the firmnefs of gold.. All thefe bodies have fome elafticity ; but we fay they are not perfeilly elaftic, becaufe they do not completely recover their original form when it has been 1 greatly TO Vifcidity IT Ohferved in all ho- S T R [ 3 itrengfh of greatly deranged. The whole gradation may fee moft du Materials, obferved in a piece of glafs or hard failing wax. In ordinary form glafs is perhaps the mod completely elaf- tic body that we know, and may be bent till juft ready to fnap, and yet completely recovers its firft form, and takes no Yet whatever ; but when heated to fuch a degree as juft to be vifible in the dark, it lofes its brittlenels, and becomes fo tough that it cannot be broken by any blow; but it is no longer elaftic, takes any fet, and keeps it. When more heated, it becomes as plaftic as clay : but in this ftate is re- markably diftinguilhed from clay by a quality which we may call viscidity, which is fomething'like dafticity, of wliich. clay and other bodies purely plaftic exhibit no appearance. This is the joint operation of ftrong edhefion and foftnefs. When a rod of perfectly foft gla£ is fuddenly ftretched a little, it does not at once take the fhape which it acquires after feme little time. It is owing to this, that in taking the impreflion of a feal, if we takeoff the feal while the wax is yet very hot, the fharpnefs of the impreffion is deftroyed immediately. Each part drawing its neighbour, and each part yielding, the prominent parts are pulled down and bjunted, and the fharp hollows are pulled upwards and alio blunted. The feal muff be kept on till all has become not only ftiff but hard. This vifeidity is to be obferved in all plaftic bodies wdiich are homogeneous. It is not obferved in clay, becauie it is ^kXc bo*8 not homogent'ol,s> but confifts of hard particles of the ar- Lts.C gillaceous earth flicking together by their attraction for water. Something like it might be made of finely pow¬ dered glafs and a clammy fluid fuch as turpentine. Vifei¬ dity has all degrees of foftnefs till it degenerates to ropy fluidity like that of olive oil. Perhaps fomething of it may be found even in the moft perfeft fluid that we are acquaint¬ ed with, as we obferved in the experiments for aicertaining fpecific gravity. There is in a late volume of the Philofophical Tranfac- tions a narration of experiments, by which it appears that the thread of the fpider is an exception to our firft general law, and that it is perfeClly duftile. It is there afferted, that a long thread of goffamer, furnifhed with an index, takes any petition whatever ; and that though the index be turned round any number of times (even many hundreds), it has no tendency to recover its firft form. The thread takes completely any fet whatever. We have not had an ■opportunity of repeating this experiment, but we have di. flinCtly obferved a phenomenon totally inconfiftent with it. If a fibre of goffamer about an inch long be held by the end horizontally, it bends downward in a curve like a (len¬ der flip of whalebone or a hair. If totally devoid of elafti- city, and perfectly indifferent to any fet, it would hang down perpendicularly without any curvature. When duCtility and elafticity are combined in different proportions, an immenfe variety of fenfcble modes of aggre¬ gation may be produced. Some degree of both are pro¬ bably to be obferved in all bodies of complex conftitution ; that is, which confift of particles made up of many different kinds of atoms. Such a conftitution of a body muft afford many fituations permanent, but eafily deranged. In all thele changes of difpofition which take place among the particles of a duCtile body, the particles are at fuch diftance that they ftill cohere. The body may be ftretched a little ; and on removing the extending force, the body {brinks into its firll form. It alfo refills moderate com- preffions; and when the comprefling force is removed, the body fwells out again. Now the cerpufcular Jail here is, that the particles are aCled on by attractions and repulfions, which balance each other when no external force is aCting on the body, and which augment as the particles are made, 1 S T R by any ext cm til eaufe, to recede from this fituntlon of nwtu- Strength of al inactivity ; for fince force is requifite to produce either the dilatation or the compreffion, and to maintain it, we lz are obliged, by the conftitution of ogr minds, to infer that Particles it is oppofed by a force accompanying or inherent in every adtad on particle of dilatable or compreflible matter ; and as this neceffity of employing force to produce a change indicate|J.epUgjunf, the agency of thefefoorpufcidar forces, and marks their kind, according es the tendencies of the particles appear to bo toward each other in dilatation, er from each other in com¬ preffion ; fo it alfo meafures the degrees of their intenfity. Should it require three times the force to produce a double compreffion, we muft reckon the mutual repulfions triple when the compreffion is doubled ; and fo in other inftances. We fee from all this that the phenomena of gohefion indicate feme relation between the inteniity of the force of cohefion j, and the diftance between the centres of the particles. Tq The great diicover this relation is the great problem in corpufcular Prcbleini11' mechanifm, as it was in the Newtonian invefligation of ^ niefharifni" force of gravitation. Could we diicover this law of aftion ‘ between the corpufcles with the fame certainty and diftimft- nefs, we might with equal confidence fay what will be the refult of any poution which we give to the particles of bodies ; but this is beyond our hopes. The law of gra¬ vitation is fo fimple that the difeovery or detedtion of it amid the variety of eeleftial phenomena required but one ftep ; and in its owm nature its poffible combinations ftdl do not greatly exceed the powers of human refearch. One is al- moft difpofed to fay that the Supreme Being has exhibited it to our reafoning powers as fufficient to employ with fuc- cefs our utmoft efforts, but not fo abftrufe as to difeourage us from the noble attempt. It feems to be otherwife with refpedl to cohefion. Mathematics informs us, that if it de¬ viates fenfibly from the law of gravitation, the fimpieft com- binations will make the joint action of feveral particles an al- moll impenetrable myftery. We muft therefoie content our- felves, for a long while to come, with a careful obfervation of the fimpieft cafes that we can propole, and with the dif¬ eovery of fecondary laws of a£tion, in which many parti¬ cles combine their influence. In pufuance of this plan, we obferve, 3^/y, That whatever is the fituation of the particles of a Particles body with refpedl to each other, when in a quiefeent ftate, ^eP£ m they are kept in thefe fituations by the balance of oppofite forces. rJ'his cannot be refufed, nor can we form to our-j3a]ance felves any other notion of the ftate of the particles of a of forces* body. Whether we fuppofe the ultimate particles to be of certain magnitudes and lhapes, touching each other in fingle points of cohefion ; or whether we (with Bolcovich) con- fider them as at a dillance from each other, and adling on each other by attradlions and repulfions —we mull acknow¬ ledge, in the firft place, that the centres of the particles (by whofe mutual diftances we muft eftimate the dillance of the particles) may and do vary their diftances from each other. What elle can we fay when we oblerve a body in- creafe in length, in breadth, and in thicknefs, by heating it, or when we fee it diminilh in all thefe dimerifions by an ex¬ ternal compreffion ? A particle, therefore, fit-uated in the midft of many others, and remaining in that lituation, muft be conceived as maintained in it by the mutual balancing of all the forces which connedt it with its neighbours. It is llluftra- like a ball kept in its place by the oppofite adlion of two °f fprings. This illullration merits a more particular applica-^ Suppofe a number of balls ranged on the table in the[ tion. angles of equilateral triangles, and that each ball is connedled with the fix which lie around it by means of an elaftic wire curled like a cork-icrew ; fuppofe fuch another ftratum of balls above this, and parallel to it, and fo placed that A Z each 16 33y txam- P’-c* S T R [ 4 1 Strength of eneh ball of the upper rtratum is perpendicularly over the diftance A B ^Materials. centJe 0f equilateral triangle below, and let thefe be v " ■ -' connected with the balls of the . under ftratum by limilar fpiral wires. Let there be a third and a fourth, and any number of fnch ftrata, all connedled in the fame manner. It is plain that this may extend to any fize and fill any fpace. —Now let this aflemblage of balls be firmly contem¬ plated by the imagination, and be fuppofed to (brink con¬ tinually in all its demenfions, till the balls, and their diftances from each other, and the connecting wires, all vanifh from the fight as difcrete individual objeCts. All this is very con¬ ceivable. It will now appear like a folid body, having length, breadth, and thicknefs; it may be comprefled, and will again refume its dimenfions ; it may be ftretched, and wall again (brink ; it will move away when (truck ; in (hort, it will not differ in its fenfible appearance from a folid elaftic body. Now when this body is in a (fate of compreffion, for inftance, it is evident that any one of the balls is at reft, in confequence of the mutual balancing of the aCtions of all the fpiral wires which connedt it with thofe around it. It will greatly conduce to the full under (landing of all that fol¬ lows to recur to this illuftration. The analogy or refem- blance between the effeCts of this conditutioirof things and the effeCts of the corpufcular forces is very great; and wherever it obtains, we may fafely draw conclufions from what we know would be the condition of the balls in par¬ ticular circumftances to what will be the condition of a body of common tangible matter. We (hall juft give one in- (truCtive example, and then have done with this hypotheti¬ cal body. We can fuppofe it of a long (hape, refting on one point; we can fuppofe two weights A, B, fufpended at the extremities, and the whole in equilibrio. We commonly exprefs this (late of things by faying that A and B are in cquilibrio. '1 his is very inaccurate. A is ih faCt in equili¬ brio with the united aCtion of all the fprings which conneCt the ball to which it is applied with the adjoining balls. Thefe fprings are brought into aCtion, and each is in equi¬ librio with the joint aCtion of all the reft. Thus through the whole extent of the hypothetical body, the fprings are brought into aCtion in a way and in a degree which ma¬ thematics can eafily inveftigate. We need not do this : it is enough for our purpofe that our imagination readily dif- covers that fome fpringsare ftretched, otheis are compreffed, and that a preffure is excited on the middle point of fup- port, and the fupport exerts a reaCtion which precifely ba¬ lances it; and the other weight is, in like manner, in im¬ mediate equilibrio with the equivalent of the aCtions of all the fprings which conneCt the laft ball with its neighbours. Now take the analogical or refembling cafe, an oblong piece of folid matter, refting on a fulcrum, and loaded with two weights in equilibrio. For the aCtions of the connecting fprings fubftitute the corpufcular forces, and the reiult will refemble that of the hypothefis. Now as there is fomething that is at lead analogous to a change of diftance of tire particles, and a concomitant change of the inteniity of the connecting j forces, we may exprefs this in the fame way that we are accuftomed to do in fimilar cafes. Let A and B (fig. i.) reprefent the cen- ccccLxxxiv.tres of two particles of a coherent elaftic body in their quiefcent inaftive (late, and let us confider only the mecha¬ nical condition of B. The body may be ftretched. In this cafe the diftance A B of the particles may become A C. In this (late there is fomething which makes it neceffary to employ a force to keep the particles at this diftance.. C has a tendency towards A, or w.e may fay that A attraCts C. We may reprefent the magnitude of this tendency of C to¬ wards A, or this attraction of A, by aline Cc perpendicu¬ lar to AC* Again* the body may be compreffed, and tire Materials. S T R may become A D. Something obliges us to Strength of employ force to continue this compreffion ; and D tends from A, or A appears to repel I). The intenfity of this tendency or repulfion may be reprefented by another per¬ pendicular T> d; and, to reprefent the different directions of thefe tendencies, or the different nature of thefe aCtions, i7 we may fet D on the oppofite fide of A B. It is in tin’s How Bof. manner that the Abbe Bolcovich has reprefented the aCtions cov;ch re* r r , r . , . , , . fm, f XT-.. ipreftntsths Plate of corpufcular forces in his celebrated Theory of Natural Philofophy. Newton had (aid, that, as the great movements corpufcular of the folar fyftem were regulated by forces operating at a forces, diftance and varying with the diftance, fo he ftrongly fuf- peCted (valde fufpicor') that all the phenomena of cohefion, with all its modifications in the different fenfible forms of aggregation, and in the phenomena of chemiftry and phyff- ology, refulted from the iimilar agency o( forces varying with the diftance of the particles. The learned Jefuit pur- fued this thought; and has (hown, that if we fuppofe an ultimate atom of matter endowed with powers of attraction and repulfion, varying, both in kind and degree, with the diftance, and if this force be the fame in every atom, it may be regulated by fuch a relation to the diftance from the neighbouring atom, that a collection of fuch atoms may have all the fenfible appearances of bodies in their different forms of folids, liquids, and vapours, elaftic or unelaftic, and endowed with all the properties which we perceive, by whofe immediate operation the phenomena of motion by impulfe, and all the phenomena of chemiftry, and of animal and ve¬ getable economy, may be produced. He (hows, that not- withftanding a perfeCt famenefs, and even a great fimplicity in this atomical conftitution, there will refult from this union all that unfpeakable variety of form and property which diverfify and embellifti the face of nature. We (hall take another opportunity of giving fuch an account of this cele¬ brated work as it deferves. We mention it only, by the by, as far as a general notion of it will be of fome (ervice on the prefent occafion. For this purpofe, we juft obferve that Bofcovich conceives a particle of any individual fpecies of matter to confift of an unknown number of particles of fimpler conftitution ; each of which particles, in their turn, is compounded of particles (till more (imply conftkuted, and fo on through an unknown number of orders, till we arrive at the fimpleft pofiible conftitution of a particle of tangible ■ matter, fufceptible of length, breadth, and thicknefs, and neceffarily confiding of four atoms of matter. And ha (hows that the more complex we fuppofe the conftitution of a particle, the more muft the fenfible qualities of the aggre¬ gate refemble the obferved qualities of tangible bodies. In particular, he (hows how a particle may be fo conftituted, that although it aft on one other particle of the fame kind through a confiderable interval, the interpofition of a third particle of the fame kind may render it totally, or almoft: totally, inaftive; and therefore an affemblage of fuch particles would form fuch a fluid as air. All thefe curious inferences are made with uncontrovertible evidence; and the greateft encouragement is thus given to the mathematical philofo*- pher to hope, that by cautious and patient proceeding in this way, we may gradually approach to a knowledge ot the laws of cohefion, that will not (hun a comparifon even with the Principia of Newton. Na ftep can be made in this inveftigation, but by obferving with care, and generalizing with judgment, the phenomena, which are abundantly nur merous, and much more at our command than thofe of the great and fenfible motions of bodies. Following this plan, we obferve, Eve/^b - It is matter of faft, that every body has forae degree of comprefiibility and dilatability ; and when the changes of j.ireiiib!e dimenfiou are fo moderate that the body completely recovers and dila- its table. S T R [ 5 ] S T R ef its original dimcnlions on the ceffation of the changing force, Material*. the extenfions or comprefiions are fenfibly proportional to — the extending or comprefiing forces ; and therefore the con- "!Inn ncRtn? hrcu are proportional to the dijlantet of the particlei ;™di'co from their quUfeent, neutral, or inohlive poftm,. fh.s feems ered by to have been ifirft viewed as a law of nature by the penetra- )r Hocke, ti e 0f Robert Hooke, one of the moll eminent phi- lofophers of the laft centut7. He publilhed a cipher, which he faid contained the theory of fpringinefs and ot the mo¬ tions of bodies by the aftion of fprings. It was this, cct, inosssttu When explained in his differtation, publilh¬ ed feme years after, it was ut tenfiofic vis. Ihis is precife- ly the propofition juft now alferted as a general fadt, a law of nature. This differtation is full of curious obfervations of faffs in fupport of his aflertion. In his application to the motion of bodies he gives his'noble difeovery of the ba- lance-fpring of a watch, which is founded on this law. 1 he fpring, as it is more and more coiled up, or unwound, by the motion of the balance, aaS on it with a force proportional to the diflance of the balance from its quiefeent pofition. The balance therefore is a&ed on by an accelerating force, which varies in the fame manner as the force of gravity a&- ing on a pendulum fwinging in a cycloid. Its vibrations therefore mull be performed in equal time, whether they are wide or narrow. In the fame diflertation Hooke mentions all the fails which John Bernoulli afterwards adduced in fup¬ port of Leibnitz’s whimfical db&rine of the force of bodies in motion, or the do&rine of the vires viva; a dodlrine which Hooke might juftly have claimed as his own, had he not feen ao its futulity. And con- Experiments made fince the time of Hooke (how that firmed by this law is ftrictly true in the extent to which we have li¬ the expe- mjted ^ viz. in all the changes of form which will be com- nments of pjetely UIUj0ne by the elafticity of the body. It is nearly true to a much greater extent. James Bernoulli, in his dif¬ fertation on the elaftic curve, relates fome experiments of his own, which feem to deviate confiderably from it; but on clofe examination they do not. The fineft experiments are thofe of Coulomb, publilhed in fome late volumes of the me¬ moirs of the Academy of Paris. He fuipended balls by wires, and obferved their motions of ofcillation, which he found accurately correfponding with this law. This we lhall find to be a very important fa& in the doc¬ trine of the ftrength of bodies, and we defire the reader to make it familiar to his mind. If we apply to this our man¬ ner of exprefling thefe forces by perpendicular ordinates Cr, X) d (fig. i.), we mull take other fituations E, F, of the particle B, and draw E e, F/; and we muft have ~D f — BD : BE, or C r : E r = BC : BE. In fuch a fuppo- fition Y dX> c e muft be a ftraight line. But we lhall have abundant evidence by and by that this cannot be ftriftly true, and that the line Bet which limits the ordinates exr prefifing the attractive forces becomes concave towards the line ABE, and that the part B ) cfeondenfcd, and exerts an elatiicity proportioned to the 'Materials condenfation. This ferves to feparate the die from the metai wlien the ftroke is over. The hollow part of the die has not touched the metal all the while, and we. may- fay that the impreffion was made by air. If this air efcape by any engraving reaching through the border, they cohere infeparably. We have admitted that the glafs plates are in contaft when they cohere thus firmly. But we are not certain of this: for if we take thefe cohering piaffes, and touch them with water, it quickly infinuates itfelf between them. Yet they {till cohere, but can now be pretty eafily fepa- jg rated. Hepulfion It is owing to this repulfion, exerted through its proper lie caufe fpfiere, that certain powders fwim on the furface of water, jf l™116 bo*and are wetted with great difficulty. Certain infefts can nfnsTnT run about on the furface of water. They have brufhy feet, find fpe- which occupy a conliderable furface ; and if their fteps are : fically viewed with a magnifying glafs, the furface of the water -m ^een ^ePre^ec^ arbund, refembling the footfteps of a elves. man walking on feather-beds. This is owing to a repul- fion between the bruih and the water. A common fly cannot walk in this manner on water. Its feet are wetted, becaufe they attract the water inftead of repelling it. A fteel needle, wiped very clean, will lie on the furface of wa¬ ter, making an impreflion as a great bar would make on a featherbed ; and its weight is lefs than that of the difplaced water. A dew drop lies on the leaves of plants without touching them mathematically, as is plain from the extreme brilliancy of the reflection at the pofterior furface ; nay, it may be fometimes obferved that the drops of rain lie on the furface of water, and roll about on it like balls on a table. Yet all thefe iubftances can be wetted; that is, wa¬ ter can be applied to them at fuch diftances that they at¬ tract it. What we faid a little ago of water infinuating itfelf be¬ tween the glafs plates without altogether deftroyir.g their cohefion, (hows that this cohefion is not the fame that obtains between the particles of one of the plates; that is, the twm plates are not in the ftate of one continued mafs. It is highly probable, therefore, that between thefe two ftates there is an intermediate ftate of repulfton, nay, perhaps many fuch, alternated with attractive ftates. A piece of ice is elaftic, for it rebounds and it rings.- Its particles, therefore, when compreffed, reiile ; and when ftretched, eontraCt again. The panicles are therefore in the ftate reprefented by Bin figure 1. aCled on by repulfive forces, 'if brought nearer ; and by attractive forces, if drawn further afunder. Ice expands, like all other bodies, by heat. It abforbs a vaft quantity of fire ; which, by combining its attractions and repulfions with thofe of the particles of ice, changes completely the law of aCtion, without making any fenfible change in the diftance of the particles, and the ice becomes w^ater. In this new ftate the particles are again in limits between attractive and repulfive forces ; for water has been flrown,by the experiments of Canton and Zimmerman, to be elaftic or compreflible. It again expands by heat. It again abforbs a prodigious quantity of heat, and becomes elaftic vapour ; its particles repelling each other at all di¬ ftances yet obferved. The diftance between the particles of one plate of glafs and thofe of another which lies on it, and is carried by it, is a diftance of repulfion ; for the force which fupports the upper piece is afting in oppofition to its weight. I his diftance is lefs than that at which it would Jufpend it below it with a filk fibre interpoltd ; for no pnf- matic colours appear between them when the filk fibre is interpofed. But the diftance at which glafs attrafts w^ater id much lefs than tins, for no colours appear when glafs is wetted with water. This diftance is lefs, and not greater, Strength nf than the other; for when the glaffes have water interpofed Matena!s”, between them inftead of air, it is found, that when any par¬ ticular colour appears, the thicknefs of the plate of water is to that of the plate of air which would produce the fame colour nearly as 3 to 4. Now, if a piece of glafs be wet¬ ted, and exhibit no colour, and another piece of glafs be fim- ply laid on it, no colour will appear ; but if they are ftrong- ly preffed, the colours appear in the fame manner as if the glaffes had air between. Alfo, when glafs is fimply wetted, and the film of water is allowed to evaporate, when it is thus reduced to a proper thinnefs, the colours ftiow them- felves in great beauty. Thefe are a few of many thoufand fafts, by which it is Particles unqueftionably proved that the particles of tangible matter matter are connefted by forces afting at a diftance, varying with the diftance, and alternately attraftive and repulfive. If ailing at» we reprefent thefe forces as we have already done in fig. 1. diftance. by the ordinates Cc,T)cl, E The fame muft be admitted of fibrous bodies, if we fuppofe tending their fibres equally ftrong, equally denfe, and ftmilarly dif- force, pofed through the whole fe&ion ; and this we muft either fuppofe, or muft ftate the diverfity, and meafure the cohe¬ fion accordingly. We may therefore affert, as a general propofition on this fubjedt, that the abfolute ftrength in any part of a body by which it refifts being pulled afunder, or the force which muft be employed to tear it afunder in that part) is propor¬ tional to the area of the fedtion perpendicular to the ex¬ tending force. Therefore all cylindrical or prifmatical rods are equally ftrong in every part, and will break alike in any part; and bodies which have unequal fedtions will always break in the fiendereft part. The length of the cylinder or prifm has no effedt on the ftrength ; and the vulgar notion, that it is eafier to break a very long rope than a Ihort one, is a very great miftake. Alfo the abfolute ftrengths of bodies which have fimilar fedtions are proportional to the fquares of their diameters or homologous Aides of the ledtion. The weight of the body itfelf may be employed to {train it and to break it. It is evident, that a rope may be fo long as to break by its own weight. When the rope is hanging perpendicularly, although it is equally ftrong in every part, it will break towards the upper end, becaufe the ,8 drain on any part is the weight of all that is below it. Its .; we relative strength in any part, or power of withftand-ftrengd1- ing the {train which is adtually laid on it, is inverfely as the quantity below that part. When the rope is ilretched horizontally, as in towing a fhip, the {train arifing from its weight often bears a very fenlible proportion to its whole ftrength. Let AEB (fig. 3.) be any portion of fuch a rope, and AC, BC be tangents to the curve into which its gravity bends it. Complete the parallelogram ACBD. It is well known that the curve is a catcnaria, and that DC is per¬ pendicular to the horizon ; and that DC is to AC as the weight of the rope AEB to the {train at A. In order that a fufpended heavy body may be equally able in every part to carry its own weight, the iedtion in that part mult be proportional to the folid contents of all that is below it. Suppofe it a conoidal fpindle, formed by the revolution of the curve Aae (fig. 4.) round the axis CE. We muft have AC2: ac2 = AEB fob : a E £ fob This condition requires the logarithmic curve for A a e, oi which C c is the axis. Thefe are the chief general rules which can be fafely de¬ duced from our cleareft notions of the coheiion of bodies. In order to make any pradtical ufe of them, it is proper to have fome meafures of the cohefion of fuch bodies as are com- S T R S T R r jo ] ci'xuniftan- ses. Sf"engih of commonly employed in our mechanics, and other druilures M iteiiais. ■yyjig'i'g they are expoied to this kind ot ftrain. iheie muft he deduced folely from experiment. Therefore they The c: he- muft be confide red as no more than general values, or _as fion of me- the averages of many particular trials. L he irregularities talsde,endsare very great, becaufe none of the fubftances are conftant on various tlcxt.ure an(j hrmneis. Metals differ by a thoufand circumftances unknown to us, according to their purity, to the heat with which they were melted, to the moulds in which they were call, and the treatment they have after¬ wards received, by forginsj, wire-drawing, tempering, &c. It is a very curious and inexplicable fa£t, that by forging a metal, or by frequently drawing it through a fmooth hole in a fteel plate, its cohefion is greatly increaied. This operation undoubtedly deranges the natural fituation of the particles. They are fqueezed clofer together in one direc¬ tion ; but it is not in the diretdion in which they reiift the frafture. In this dbedUon they are rather feparated to a greater diftance. The general denlity, however, is augment¬ ed in all of them except lead, which grows rather rarer by wire-drawing : but its eohefion may be more than tripled by this operation. Gold, filver, ancf brafs, have their co¬ hefion nearly tripled ; copper and iron have it more than doubled. In this operation they alfo grow much harder. It is proper to heat them to rednefs after drawing a little. This is called nealing or annealing. It foftens the metal again, and renders it fufceptible of another drawing without the rifle of cracking in the operation. We do not pretend to give any explanation of this re¬ markable and very important fa£l, which has lomething re- fembling it in woods and other fibrous bodies, as will be mentioned afterwards. The varieties in the cohefion of Hones and other minerals, and of vegetable and animal fubftances, are hardly fufeep- trble of any defeription or clafirfication. We fhall take for the meaiure of cohefion the number of pounds avoirdupois which are juft fufficient to tear afunder a rod or bundle of one inch fquare. From this it will be cfduieient eafy to compute the ftrength correfponding to any other 40 Coheiion and ferength metal dimenfion. ijtf, Metals. Gold, caft Silver, caft Copper,, caft Iron, caft Iron, bar Steel, bar Tin, caft; f Japan 1 Barbary Hungary | Anglefea L Sweden f 20,! 1 I Ordinary iStirian 1 Bell Swedifh and Ruffian Horfe-nails C Soft \ Razor temper f Malacca I Banca 4 Block 1 Englifh block L- grain { lbs. ,000 000 q 0,00.0 43,000 19,500 22,000 3i,cco 34,000 37,000 42,000 59,000 68,000 75,000 84,000 71,000 (a) 120,000 150,000 3,100 ^ 3,600/ 3,800 5,200 6,500 Lead, caft Reg ulus of antimony Zinc Bifinutn * lb?, 860 1,000 2,600 2,900 Sfrengthej Mater ids, 41 It is very remarkable that almoft all the mixtures of me-Tenacity tals are more tenacious than the metals themfelves. The of mctfal® change of tenacity depends n.jch on the proportion of the^^”,.^ 1 ingredients, and the proportion which produces the moll tenacious mixture is different in the different metals. We have felefted the following from the experiments of Mufchen- broek. The proportion of ingredients here feledted is that which produces the greateft ftrength. Two parts of gold with one of filver Five parts of gold with one of copper Five parts of iilver with ©ne of copper Four parts of filver with one of tin Six parts of copper with one of tin Five parts of Japan copper with one of Banca tin - Six parts of Chili copper with one of Malacca tin - - . Six parts of Swedilh copper with one of Malac¬ ca tin - Brafs confifts of copper and zinc in an un¬ known proportion ; its ftrength is Three parts of block-tin v/ith one part of lead Eight parts of block-tin with one part of zinc Four parts of Malacca tin with one part of re- gulus of antimony - - Eight parts of lead with one of zinc Four parts of tin with one of lead and one of zinc - - 28,000 50,000 48,500 41,000 41,000 57,000 60,000 64,000 51,000 10,200 10,000 12,000 4,500 13,000 Thefe numbers are of confiderable life in the arts. The mixtures of copper and tin are particularly interefting in the fabric of great guns. We lee that, by mixing "copper whofe greateft ftrength does not exceed 37,000 with tin which does not exceed 6,000, we produce a metal whofe tenacity is almoft double, at the fame time that it is harder and more eafily wrought. It is, however, more fufible, which is a great inconvenience. We alfo fee that a very fmall addition of zinc almoft doubles the tenacity of tin, and increafes the tenacity of lead five times; and a fmall ad¬ dition of lead doubles the tenacity of tin. Thefe are eco¬ nomical mixtures. This is a very valuable information to the plumbers for augmenting the ftrtngth of water- pipes. By having recourfe to thefe tables, the engineer can pro¬ portion the thicknefs of his pipes (of whatever metal) to the preflures to which they are expofed. Woods. We may premife to this part of the table the following general obiervations : ^ 1. The wood immediately furrounding the pith or heart Tenacity c of the tree is the weakeft, and its inferiority is fo much fhergrh oi more remarkable as the tree is older. In this affertion^004, however, we fpeak with fome hefitation. Mufchenbroek’s detail of experiments is decidedly in the affirmative. Mr Buffon, on the other hand, fays, that his experience has taught him that the heart of a found tree is the ftrongeft ; but he gives no initances. We are certain, from many ob- fervationa ftron-p??i!3 Waii an exPer,n]e"t hY Mufchinbroek, to examine the vulgar notion that iron forged from old horfe-nails was wronger than all others, and ffiows its falfity. S T R r trcnpth of fervations of our own on very large oaks and tirs> that the Materia!*. jieart ;8 much weaker than the exterior parts. 2. The wood next the bark, commonly called the 75° 9,250 8.750 8>33° 8,130 7,650 6.750 6,000 ;5>5CO 4,880 44 Vnd of o- her fub- •antes. Mr Mufchenbroek has given a very minute derail of the experiments on the afh and the walnut, Hating the weights which were required to tear afunder flips taken from the four fides of the tree, and on each fide in a regular progreffion from the centre to the circumference. The numbers of this table correfponding to thefe two timbers may therefore be confi- dered as the average of more than 50 trials made of each ; and he fays that all the others were made with the fame care. We cannot therefore fee any reafon for not confi¬ ding in the rcfults ; yet they are confiderably higher than thofe given by fome other writers. Mr Pitot fays, on the authority of his own experiments, and of thofe of Mr Pa¬ rent, that 60 pounds will juft tear afunder a fquare line of found oak, and that it will bear 50 with fafety. This gives 8640 for the utmoft llrength of a fquare inch, which is much inferior to Mufchenbrotk’s valuation. We may add to thefe, Ivory Bone H orn Whalebone 1 ooth of fea-calf 16,270 5,250 8,750 7,500 4,075 n ] S T R Tire reader will furely obferve, that thefe numbers etc-^trengfli of prefs fomething more than the utmoft cohefion ; tor the A‘^t'-naQ weights are fuch as will very quickly, that is, in a minute ^ or two, tear the rods afunder. It may be faid in general. No fub- that two-thirds of thefe weights will fenfibly impair theftance to ^ ftrength after a confiderable while, and that one half is ^lie utmoft that can remain fufpended at them without rifle f,,rture above ever ; and it is this laft allotment that the engineer fhould reC- one half nj kon upon in his conftruritions. There is, however,confiderable ftrength. differeiace in this refperit. Woods of a very ftraight fibre, fuch as fir, will be lefs impaired by any load which is not luf- ficient to break them immediately^ According to Mr Emerfon, the load which may be fafely fufpended to an inch fquare is as follows : Iron Brafs Hempen rope Ivory Oak, box, yew, plum-tree Elm, afh, beech Walnut, plum Red fir, holly, elder, plane, crab Cherry, hazle Alder, afp, birch, willow Lead ' Freeftone 76,400 35.600 19.600 15,700 7,850 6,070 5>36o 5,000 4,760 4,290 430 914 He gives us a pra&ical rule, that a cylinder whofe dia¬ meter is d inches, loaded to one-fourth of its abiolute ftrength, will Carry as follows : Iron - 135] Good rope - 22 I Oak - 14 [ Fir - 9) Cwt. The rank which the different woods hold in this lift of Mr Emerfon’s is very different from what we find in Mu- fchenbroek’s. But ptecife meafures muff not be expected in this matter. It is wonderful that in a matter of fuch un- queftionable importance the public has not enabled fome perfons of judgment to make proper trials. They are be¬ yond the abilities of private perfons. II. Bobies may be crushed. It is of equal, perhaps greater, importance to know the ft is of im» ftrain which may be laid on folid bodies without danger ofportance to cnifhing them. Pillars and polls of all kinds are expofed to'5rjow' this ilrain in its fimpleftform; and there are cafes where thie^^-^11^1 ftrain is enormous, viz. where it arifes from the oblique po- fition of the parts; as in the fluts, braces, and truffes, which occur very frequently in our great works. It is therefore moft defirable to have fome general know¬ ledge of the principle which determines the ftrength of bo¬ dies in oppofition to this kind of ftrain. But unfortunately we are much more at a lofs in this than in the laft cafe. The mechanifm of nature is much more complicated in the prefent cafe. It muft be in fome circuitous way that com- prefiion can have any tendency to tear afunder the parts of a folid body, and it is very difficult to trace the fteps. If we fuppofe the particles infuperably hard and in con- ta£l, and difpofed in lines which are in the diredlion of the external preffurcs, it does not appear how any preffure can difunite the particles; but this is a gratuitous fuppofition* There are infinite odds againft this precife arrangement of the lines of particles; and the compreflibility of all kinds of matter in fome degree fhows that the particles are in a fitu- ation equivalent to diftance. This being the cafe, and the particles, with their intervals, or what is equivalent to in- B 2 N tervals, S T R [ I pfTfinpth oftervals, being in fituations that are oblique with refpeft to 3VFj,p ’ l- the preffures, it muft follow, that by fqueezing them toge- V * ther in one direction, they are made to bulge out ©r fepa- rate in other direftions. This may proceed fo far that lome may be thus pufhed laterally beyond their limits of cohelion. The moment that this happens the refiftance to compreffion is diminilhed, and the body will now be crufhed together. We may form, feme notion of this by fuppofing a number of fpherules, like fmall lliot, flicking together by means of a cement. Compreffing this in fome particular direction caufes the fpherules to adt among each other like fo many wedges, each tending to penetrate through between the three which lie below It : and this is the fimpleft, and perhaps the only diilindl, notion we can have of the matter. We have reafou to think that the conllitution of very ho. xnogeneous bodies, fuch as glafs, is not very different from this. The particles are certainly arranged fymmetrically in the angles of fome regular folids. It is only fuch an ar¬ rangement that is coniillent with tranfparency, and with the ^ free paffage of light in every direction. 'P},c;r If this be the conflitution of bodies, it appears proba- frren'th ble that the ftrength, or the refiftance which they are ca- 01 ^°fft'1" Pakle of making to an attempt to crufh them to pieces, a'i'-t to' ProPoltional to the area of the feftion whofe plane is fuch a perpendicular to the external force ; for each particle being force fimilarly and equally adled on and refifted, the whole refift¬ ance muft be as their number; that is, as the extent of the fedlion. Accordingly" this principle is afiumed by the few writers who have coniidered this fubjedl; but we confefs that it appears to us very doubtful. Suppofe a number of brittle or friable balls lying on a table uniformly arranged, but not cohering nor in contadl, and that a board is laid over them and loaded with a weight ; we have no hefitation in faying, that the weight neceffary to crufh the whole colie&ion is proportional to their number or to the area of the fedlion. But when they are in contaft (and ftill more if they co¬ here), we imagine that the cafe is materially altered. Any individual ball is crufhed only in confequence of its being bulged outwards in the direction perpendicular to the pref- fure employed. If this could be prevented by a hoop put round the ball like an equator, we cannot fee how any force can cruih it. Any thing therefore which makes this bul¬ ging outwards more difficult, makes a greater force neceffa¬ ry. Now" this effedl will be produced by the mere contadl of the balls before the preffure is applied; for the central ball cannot fwell outward laterally without puffing away the balls on all Tides of it. This is prevented by" the fric¬ tion on the table and upper board, which is at leaft equal to one third of the preffure. Thus any interior ball becomes ilronger by the mere vicinity of the others ; and if we farther fuppofe them to cohere laterally, we think that its ftrength will be ftill more increafed. The analogy between thefe balls and the cohering parti¬ cles of a friable body is very perfedl. We ffould therefore expedl that the ftrength by which it refills being cruffed will increafe in a greater ratio than that of the feeftion, or the fquare of the diameter of iimilar fedlions ; and that a fquare inch of any matter will bear a greater weight in proportion as it makes a part of a greater fedlion. Ac¬ cordingly this appears in many experiments, as will be no¬ ticed afterwards. Mufchenbroek, Euler, and fome others, have fuppofed the ftrength of columns to be as the biqua¬ drates of their diameters. But Euler deduced this from for¬ mulae which occurred to him in the courfe of his algebraic analyfis; and he boldly adopts it as a principle, without looking for its foundation in the phyfrcal affumptions which he had made in the beginning of his inveftigation. But ] S T R fome of his original affumptions w"ere as paradoxical, or atStrergffoj leaft as gratuitous, as thefe refults : and thofe, in parti- Materials, cular, from which this proportion of the ftrength of co- lumns w'as deduced, were almoft foreign to the cafe ; and therefore the inference was of no value. Yet it was recei¬ ved as a principle by IVIulchenbroek and by the academicians of St Peterfburgh. We make thefe very few obfervations, becaufe the fubjedl is of great pra&ical importance ; and it is a oreat obftacle to improvements when deference to a great name, joined to incapacity or indolence, caules authors to adopt his carelefs reveries as principles from which they are afterwards to draw important confequences. mint be acknowledged that we have not as yet eflabliffed the re¬ lation between the dimenfions and the llrength of a pillar on folid mechanical principles. Experience plainly .contradicts the general opinion, that the ftrength is proportional to the area of the fedlion ; but it is itill more inconfiftent with the opinion, that it is in the quadruplicate ratio of the diame- 4^ ^ ters of fimilar lections. It would feem that the ratio de- pends much on the internal llructure o? the body"; and ex- 01)|^ e: periment feems the only method foi afeertaining its general perantut. laws. If we fuppofe the body to be of a fibrous texture, having the fibres lituated in the dire£tion of the preffure, and (lightly adhering to each other by fome kind of cement, fuch a body will fail only by the bending of the fibres, by which they will break the cement and be detached from each other. Some¬ thing like this may be fuppofed in wooden pillars. In fuch cafes, too, it would appear that the refiftance mull be as the number of equally refilling fibres, and as their mutual fup- port, jointly ; and, thererore, as fome function of the area of the fedlion. The fame thing muft happen if the fibres are naturally crooked or undulated, as is obferved in many woods, &c. provided we fuppofe fome fimilarky in their form. Similarity of fome kind mull always be fuppofed,- otherwife we need never aim at any general inferences. In all cafes therefore we can hardly refufe admitting that the ftrength in oppofition to compreffion is proportional to a fundlion of the area of the feftion. As the whole length of a cylinder or prifra is equally preffed, it does not appear that the ftrength of a pillar is at all affe&ed by its length. If indeed it be fuppofed to bend under the preffure, the cafe is greatly changed, becaufe it is then expofed to a tranfverfe drain ; and this increafes with the length of the pillar. But this will be coniidered with due attention under the next clafs of drains. Few experiments have been made on this fpecies of ftrength and drain. Mr Petit fays, that his experiments, and thofe of Mr Parent, ftow that the force neceffary for ernffing a body is nearly equal to that which will tear it afunder. He fays that it requires fomething more than 60 pounds on every fquare line to crulh a piece of found oak. But the rule is by no means general: Glafe, for inftance, will carry a hundred times as much as oak in this way, that is, relling on k; jsut will not fufpend above four or five times as much. Oak will fufpend a great deal more than fir; but fir will carry twice as much as a pillar. Wood's of a foft texture, although confifting of vety tenacious fibies, are more eafily cruffed by their load. This foftnefs of texture is chiefly owing to their fibres not being ftraight but undulated, and there being confiderable vacuities between them, fo that they are eafily bent laterally and cruffed. When a pod is overftrained by its load, it is obferved to fwell fenlibly in diameter. Increafing the load caufes lon¬ gitudinal cracks or ffivers to appear, and it prefently after gives way. This is called crippling. In all cafes where the fibres lie oblique to the ftrain the ftrength is greatly diminifhed, becaufe the parts can then be made [ateiials S T R [ i reng hofmade to Aide ©n each other, when the cohefion of the ce- meriting matter is overcome. # . r . . ^ Mufchenbroek has given fome experiments on this iubjett; hut they are cafes of long pillars, and therefore do not be¬ long to this place. They will be confidered afterwards. The only experiments ©f which we have feen any detail (and it is ufelefs to infert mere affertions) are thofe of Mr Gautluy, in the 4th volume of Rozier’s Journal de Phyjique. This engineer expofed to great preffures fmall re&angular parallelopipeds, cut from a great variety of hones, and noted the weights which crufhed them. The following table ex¬ hibits the medium refults of many trials on two veiy uni¬ form kinds of freeilone, one of them among the harden, anu the other among the fofteft ufed in building. Column lit expreffes the length AB of the feftion in French lines or izths of an inch ; column zd expreffes the breadth BC ; column 3d is the area of the feaion in fquare lines ; column 4th is the number of ounces required to crufh the piece ; column 5th is the weight which was then borne by each fquare line of the feaion ; and column 6th is the round numbers to which Mr Gauthey imagines that thofe in column 5th approximate. 49 spe i- ea.s for is. yur- fe made 1 frte- jne AB BC 8 8 9 9 18 18 12 16 16 18 18 24 Hard Stone. AB X BC Weight 64 7i6 96 2625 128 4496 Soft Stone. 144 560 162 324 432 848 2928 5296 Force 1 T>5 27>3 35>l 3>9 5>3 9 12,2 12 24 36 4 4>5 9 12 50. Met fatis- fadtory. Little can be deduced from thefe experiments: The 1 ft and 3d, compared with the 5th and 6th, (hould furnifh iimilar refults ; for the iff and 5th are refpeaively half of the 3d and 6th: but the 3d is three times ftronger (that is, a line of the 3d) than the firfl, whereas the 6th is only twice as ftrong as the 5 th. It is evident, however, that the ftrength increafes much fafter than the area of the feftion, and that a fquare line can carry more and more weight, according as it makes a part of a larger and larger fedtion. In the feries of experiments on the foft ftone, the individual ftrength of a fquare line feems toincreafe nearly in the proportion of the feftion of which it makes a part. Mr Gauthey deduces, from the whole of his numerous ex¬ periments, that a pillar of hard done of Givry, whole fedtion is a fquare foot, will bear with perfedt fafety 664,000 pounds, and that its extreme ftrength is 871,000, and the fmalleft ftrength obferved in any of his experiments was 460,000. The foft bed of Givry ftone had for its fmalleft ftrength 187,000, for its greateft 311,000, and for its fafe load 249,000. Good brick will carry with fafety 3 20,000 ; chalk will carry only 9000. The boldeft piece of architedfure in this refpeft v/hich he has feen is a pillar in the church of All-Saints at Angers. It is 24 feet long and 11 inches fquare, and is loaded with 60,000, which is not 4th of what is neceffary for crufhing it. We may obferve here by the way, that Mr Gauthey’s meafureot the fufpending ftrength of ftone is vaftly fmall in proportion to its power of fupporting a load laid above it. He finds that a prifm of the hard bed of Givry, of a foot fedtion, is torn afunder by 4600 pounds ; and if it be firmly fixed horizontally in a wall, it will be broken by a weight of 56,000 iufpended a. foot from the wall. If it reft on two props at afoot diftance, it will be broken by 206,000 laid on its middle. Thefe experiments agree fo ill with each 3 1 s T R other, that little ufe can be made of them. The fubjedt is Strength of of great importance, and well deferves the attention of the patriotic philofopher. ^ j A fet of good experiments would be very valuable, be- Good er- caufe it is againft this kind of ftrain that we muft guard by p^rinients. judicious conftrudfion in the moft delicate and difficult Pro'^!^|gj blems which come through the hands of the civil and mili¬ tary engineer. The conftrudtion of ftone arches, and the conftrudtion of great wooden bridges, and particularly the conftruftion of the frames of carpentry called centres in the eredtion of ftone bridges, are the moft difficult jobs that oc¬ cur. In the centres on which the arches of the bridge of Orleans were built fome of the pieces of oak were carrying upwards of two tons on every fquare inch of their fcamling. All who faw it faid that it was not able to carry the fourth part of the intended load. But the engineer underftood the principles of his art, and ran the rifle : and the refult com¬ pletely juftified his confidence ; for the centre did not com¬ plain in any part, only it was found too fupple ; io that it went out of fhape while the haunches only of the arch were laid on it. The engineer corredted this by loading it at the crown, and thus kept it completely in fhape during the pro- grefs of the work. In the Memoirs (old) of the Academy of Peteifburgh for IT'S, there is a jdiffertation by Euler on this fubjedt, but particularly limited to the ftrain on columns, in whick the bending is taken into the account. Mr Fufs has treat¬ ed the fame fubjedt with relation to carpentry in afubfequent volume. But there is little in thefe papers befides a dry ma¬ thematical difquifition, proceeding on affumptions-which (to fpeak favourably) are extremely gratuitous. The moft im¬ portant confequence of the compreffion is wholly overlook¬ ed, as we fhall prefently fee. Our knowledge of the me- chanifm of cohefion is as yet ffir too imperfedt to entitle us to a confident application of mathematics. Experiments fhould be multiplied. ^ The onlyr way we can hope fp make thefe experiments Bow they ufeful is to pay a careful attention to the manner in which a!'e^to ^ the fradture is produced. By difeovering the general re-^ J femblances in this particular, we advance a ftep in our power of introducing mathematical meafurement. Thus, when a cubical piece of chalk is flowly crufhed between the chaps of a vice, we fee it uniformly fplit in a furface oblique to the preffure, and the two parts then Aide along the furface of fra&ure. This fhould lead us to examine mathematically what relation there is between this furface of fradture and the neceffary force ; then we fhould endeavour to determine experimentally the pohtion of this furface. Having difeo- vered fome general law or refemblance in this circurnffance^ we fhould try what mathematical hypothefis will agree with this. Having found one, we may then apply our fimpleft notions of cohefion, and compare the refult of our computa¬ tions with experiment. We are authorifed to fay, that a feries of experiments have been made in this way, and that their re¬ fults have been very uniform, and therefore fatisfadtory, and, that they will foon be laid before the public as the founda-- tions of iuccefsful pradtice in the conftrudtion of arches. Ilf. A Body may be broken across. S3 The moll ufual, and the greateft ftrain, to which mate-1* h of ira- rials are expofed, is that which tends to break them tranf- verfely. It is feldom, however, that this is done in a man-whjt fyra;r, ner perfectly fimple ; for when a beam projedts horizontally will break, from a wall, and a weight is fufpended' from its extremity,3 body the beam is commonly broken near the wall, and the inter- *ranfveiA- mediate part has performed the fundtions of a lever. It fometimes, though rarely, happens that the pin in. the joint of a pair of pincers or feiffars is cut through by the ftrain. r S T R <* Experi¬ ments made to silcertain it. Strengtli of ftrain ; and this is almoftthe only cafe of a fimple traniverfe , iat'riaiS' fratlure. Bein^ fo rare, we may content ourfelves with faying, that in this cafe the ftrength of the piece is propor¬ tional to the area of the fedh'on. Experiments were made for difeovering the refiftances made by bodies to this kind of drain in the following manner : Two iron bars were difpofed horizontally at an inch diftance; a third hung perpendicularly between them, being fupported by a pin made of the fubftance to be examined. This pin was made of a prifmatic form, fo as to fit exactly the holes in the three bars, which were made very exaft, and of the fame fize and fhape. A icale was fufpended at the lower end of the perpendicular bar, and loaded till it tore out that part of the pin which filled the middle hole. This weight was evi¬ dently the meafure of the lateral cohefion of two fedlions. i he fide-bars xvere made to grafp the middle bar pretty ftrongly between them, that there might be no diftance im- pofed between the oppofite preflures. This would have combined the energy of a lever with the purely tranfverfe preffure. For the fame reafon it was neceffary that the in¬ ternal parts of the holes fhould be no fmaller than the edges. Great irregularities occurred in our firft experiments from this caufe, becaufe the pins were fomewhat tighter within than at the edges; but when this was correfted they were extremely regular. We employed three fets of holes, viz. a circle, a fquare (which was occafionally made a rectangle whofe length was twice its breadth), and an equilateral tri- anode. We found in all our experiments the ftreiigth ex¬ actly proportional to the area of the fetlion, and quite in¬ dependent of its figure or pofition, and we found it confi- derably above the diredf cohefion ; that is, it took consider¬ ably more than twice the force to tear out this middle piece than to tear the pin afunder by a direft pull. A piece of fine freeftone required 205 pounds to puli it direftly afun¬ der, and 575 to break it in this way. The difference was very confiant in any one fubftance, butwaried from -yds to ^ds in different kinds of mat . r, being fmalleft in bodies of a fibrous texture. But indeed we could not make the trial on any bodies of confiderable cohefion, becailfe they required fuch forces as our apparatus could not fupport. Chalk, day baked in the fun, baked fugar, brick, and freeitone, were the ftrongeft that we could examine. But the more common cafe, where the energy of a lever intervenes, demands a minute examination. Let DABC (fig. 5*n 1.) be a vertical feftion of a prifma¬ tic folid (that is, of equal fize throughout), projecting hori¬ zontally from a wall in which it is firmly fixed ; and let a weight P be hung on it at B, or let any power P ad at B in a diredion perpendicular to AB. Suppofe the body of infuperable ftrength in every part except in the vertical fec- tion DA, perpendicular to its length. It muft break in this fedion only. Let the cohefion be uniform over the whole of this fedion ; that is, let each of the adjoining par¬ ticles of the two parts cohere with an equal force/. There are two ways in which it may break. The part ABCD may limply Aide down along the furface of fvadure, provided that the power ading at B is equal to the accu¬ mulated force which is exerted by every particle of the lec¬ tion in the diredion AD. But fuppofe this effedually prevented by fomething that fupports the point A. The adion at P tends to make the body turn round A (or round a horizontal line palling thro’ A at right angles to AB) as round a joint. This it can¬ not do without feparating at the line DA. In this cafe the adjoining particles at D or at E will be feparated ho¬ rizontally. But their cohefion refifts this reparation. In order, therefore, that the fradure may happen, the en* C 14 ] S T R 55 Their re- fult. 56 The ftrength of a lever ergy or momentum of the power P, ading by means of the Strerrgh f>f lever x'lB, muft be fuperior to the accumulated energies .of iVtatcri'dk the particles. The endrgy of each depends not only on its ^ cohelive force, but alfo on its fituation ; for the fuppofed infuperable firmnefs of the reft of the body makes it a lever turning round the fulcrum A, and the cohelion of each par¬ ticle, fuch as D or E, ads by means of the arm DA or EA. The energy of each particle will therefore be had by multiplying the force exerted by it in the initant of fradure by the arm of the lever by which it ads. Let us therefore firft fuppofe, that in the inftant of frac¬ ture every particle is exerting an equal force f. The ener¬ gy of D wall be/XDA, and that of E will be /XEA, and that of the whole will be the fum of all thefe produds. Let the depth DA of the fedion be called d, and let any undetermined part of it EA be called x, and then the fpace occupied by any particle will be x. The cohefion of this fpace may be reprefented by f and that of the whole by f d. 'I he energy by which each element x of the line DA, or / refifts the fradure, will be/x x, and the whole accu- cumulated energies will be /x/x x. This we know to be /X 4 eh, or fd X 4 It is the fame therefore as if the co¬ hefion/r/ of the whole fedion had been ading at the point G, which is in the middle of DA. xhe reader who is not familiarly acquainted with this fluxionary calculus may arrive at the fame conclufion in an¬ other way. Suppofe the beam, inftesd of projeding hori¬ zontally frftm a wall, to be hanging fr®m the ceiling, in which it is firmly fixed Let ns confider how tire equal co¬ hefion of every pari operates in hindering the lower part from feparating from the upper by opening round the joint A. The equal cohefion operates juft as equal gravity would do, but in the oppofite diredion. Now we know, by tlrfe moft elementary mechanics, that the effed of this will be the fame as if the whole weight were concentr ated in the centre of gravity G of the line DA, and that this point G is in the middle of DA. Now the number of fibres being as the length d of the line, and the cohefion of each fibre being — /, the cohefion of the whole line is/Xr/or/J. J he accumulated energy therefore of the cohefion in the inftant of fradure is f dY*\d. Now this muft be equal or juft inferior to the energy of the power employed to break it. Let the length AB be called /; then P X / is the cor- refponding energy of the power. This gives us f d \ d-~pl for the equation of equilibrium correfponding to the verti¬ cal fedion ADCB. Suppofe now that the fradure is not permitted at DA, but at another fedion ^ “ more remote from B. The body being priimatic, all the vertical fedions arc equal; and theie-- fore j d\ d is the fame as before. But the energy of the power is by this means increafed, being now = P X B inftead of P X B A : Hence we fee that when the prifmatic body is not iniuperably llrong in all its parts, but .equally ftrong throughout, it muft break clofe at the wall, where the ftrain or energy of the power is greateft. We fee, too, that a power which is juft able to break it at the wall is unable to break it anywhere elfe ; alfo an abfolute cohe- fton fd, which can withftand the powerin the fedion DA, will not withftand it in the fedion ^ ^and will with¬ ftand more in the fedion d'd. I his teaches us to diftinguifh between abfolute and rela¬ tive ftrength. The relative ftrength of a fedion has a refe¬ rence to the ftrain adually exerted on that fedion. This relative ftrength is properly meafured by the power which is juft able to balance or overcome it, when applied at its proper S T R r i Strength rfpreper place. Now fmce we had fd\d-=:pl, we have = for the meafure of the ftretjgth of the fe&ion DA, in relation to the power applied at B. If the folid is a rectangular beam, whofe breadth is b, it is plain that all the vertical fedtions are equal, and that AG or 4 d is the fame in all. Therefore the equation expreffing the* equilibrium between the momentum of the external force and the accumulated momenta of cohefion will be - p l — f d b \ d. The produft db evidently expreffes the area ot the fee- tion of fradlure, which we may call /, and we may exprels the equilibrium thus, pi— f s 4 A and 2 / \ d — j s : p. Now fs is a proper expreffion of the abfolute cohefion of the fedtion of fraAnre, and /> is a proper meafure of its ftrength in relation to a power applied at B. We may therefore fay, that twice the length of a rectangular beam is to the depth as the abfolute cohejion to the relativeJlrength. Since the adtion of equable cohefion is fimilar to the ac¬ tion of equal gravity, it follows, that whatever is the fioure of the fedtion, the relative ftrength will be the fame as if the abfolute coheiion of all tt e fibres were adding at the centre ol gravity of the fedtion. Get g be the diitance between the centre of gravity of the fedtion and the axis of fradture, we (hall have pi zz. jsg, and l:g vz. f s % p. It will be very ufeful to jecolledt this analogy in words : “ The length of a prifmatic beam of any f ape is to the height of the centre of gravity above the lower fde, as the abjolute cohefion to the flrength relative to this length.” Becaufe the relative ftrength of a redtangular beam is fbdfdfbd1 . l or—-—-, it follows, that the relative ftrengths ot different beams are proportional to the abfolute cohefion of the particles, to the breadth, and to the fqnare of the depth diredtly, and to the length inverfely j alio in piifms whole fedtions are fimilar, the ftrengths are as the cubes of the dia¬ meters. Such are the more general refults of the meehanifm of . this tranfverfe ft rain, in the hypothelis that all the particles rice'i ^ ! are cxerting equal forces in the inftant of fradture. We are indebted for this dodtrine to the celebrated Galileo ; and it was one of the firft fpecimens of the application of mathe¬ matics to the fcience of nature. We have not included in the preceding inveftigation that adtion ot the external force by which the fblid is drawn fidewife, or tends to flide along the furface of fradture. We have fuppofed a particle E to be pulled only in the diredtion E r, pei-pendicular to the fedtion of fradture, by the adtion of the crooked lever BAE. But it is alfo pulled in the di- redtion E A; and its readtion is in fome diredtion ‘ E, com¬ pounded of tf by which it refills being pulled outwards ; and f r, by udiich it refifts being pulled downwards. We are but imperfedtly acquainted with the force £ ey and only know that their accumulated fum is equal to the force p : but in all important cafes which occur in pradtice, it is un- necefiary to attend to this force ; becaufe it is fo fmall in comparifon of the forces in the diredtion E e, as we eafily conclude from the ufual fmallnefs of AD in comparifon of AB. 'The hypothefis of equal cohefion, exerted by all the par¬ ticles in'the irrftant of fradture, is not conformable to nature: for we know, that when a force is applied tranfverfely at B, to nature. ^ie beam is bent downwards, becoming convex on the up¬ per fide ; that fide is therefore on the ftretch. The par¬ ticles at D are farther removed from each other than thofe at E, and are therefore ablual/y exerting greater cohefive for¬ ces. We cannot fay with certainty and precifioa in what 5 1 s T R proportion each fibre is extended. It feems moll probable strength of that the extenfions are proportional to the diftances from A. "t We fhall fuppofe this to be really the cafe. Now recalled! the general law which we formerly faid was obferved in all moderate extenfions, viz. that the attra&ive forces exerted by the dilated particles were proportional to their dilata¬ tions. Suppofe now that the beam is lo much bent that the particles at D are exerting their utmoft force, and that this fibre is juft ready to break or adlually breaks. It is plain that a total fradlure rnuft immediately enfue ; becaufe the torce which was fuperior -to the full coheiion of the par¬ ticle at D, and a certain portion of the cohefion of all the reft, will be more than fuperior to the full cohefion of the particle next within D, and a fmaller portion ol the cohe¬ iion of the remainder. Now let F reprefent, as before, the full force of the ex¬ terior fibre D, which is exerted by it in the inftant of its breaking, and then che force exerted at the fame inftant by the fibre E will be had by this analogy AD : AE, or f x d:x — f'. ~t% and the force really exerted by the fibre E. ls/x-. The force exerted by a fibre whofe thicknefs is x is; therefore —XLA but this force refifts the drain by adting d by means of the lever EA or x. Its energy or mo- 57 . Afterr, in- ed on tte eq hdiox ?3 But that hyvothefii rot con¬ formable mentum is therefore /x1; and the accumulated moments 59 of all the fibres in the line AE will be /X fum of —— a This, when x is taken equal to d, will exprefs the momen¬ tum of the whole fibres in the line AD. This, therefore,, ■v di is / —j , or/{ dly orfdX\d. Now / d expreffes the ab* folute cohefion of the whole line AD. The accumulated momentum is therefore the lame as if the abfolute coheiion of the whole line were exerted at -jd ot AD from A. From 1 hefe.premiles it follows that the equation expref-The fing the equilibrium of the (train and cohefion is p / ^ J ^afterrireft Xfd; and hence we deduce the analogy, “ ds thrice the {in ot^er length is to the depthy fo is the abfolute cohefion to the relativcpiincipies* Jlrength.” This equation and this proportion will equally apply to red!angular beams whofe breadth is b ; for we (hall then have p / ^ ri X y A We alfo fee that the relative ftrength is proportional to the abfolute cohefion of the particles, to the breadth, and to the fquare of the depth diredtly, and to the length in¬ verfely : for p is the meafure of the force with which it is fbdld fb d' t , . . ^ t refilled, and/> = ’ In ^ refPcft tliere* fore this hypothefis agrees with the Galilean; but it aftigna to every beam a (mailer proportion of the ablolute cohefion of the ledtion of fradhire, in the proportion of 3 to 2. In the Galilean hypothefis this fedtion has a momentum equal to 4 of its ablolute ftrength, but in the other hypothefis it is only fd. In beams of a different form the proportion may be different. As this is a moft important propofition, and the founda¬ tion of many pradtical maxims, we are anxious to have it clearly comprehended, and its evidence perceived by all.. Our better informed readers will therefore indulge us while we endeavour to prefent it in another point of view, where it will be better feen by thofe who are not familiarly ac¬ quainted with the fluxionary calculus. 4 S T R t I Ftfrcrgth of Fig'. n1 2. A is a pevfpeftive view oF a three fidea beam IVTarerials. projedtiiig horizontally from a wall, ane1. loaded with a weight at B juft fufilcient to break it.. DABC is a vertical plane The far e through its highell point D, in the direftion ol its length, prooofition aY) a is another vertical feftion perpendicular to AB. Xhe prefeme.d p;ece ^ging fuppofed of infuperable ftrength everywhere ex- .cept in the fedtion a I) a, and the cohefion being alio fup- view. pofed iniuperable along the line ^ A o, it can break nowhere but in this feftion, and by turning round a A a as round a hinge Make D d equal to AD, and let D d reprefent the abfolute cohefion of the fibre at D, which abfolute cohefion we expreffed by the fymbol f. Let a plane a d a be made to pats through a a and d, and let d a' a be another crofs feftion. It is plain that the prifmatic folid contained be¬ tween the two iedlions a I) a and n' a a will alfo be juft able to overcome the cohefions aHually exerted by the different fibres in the inftant of frac¬ ture, becaufe the weight of each fibre, luck as E e> is juft fuperior to the cohefion adtually exerted at E. Let 0 be the centre of gravity of the pyramidal folid, and draw 0 O perpendicular to the plane 0 D 0. T. he whole weight of the folid ^ D 0 0 may be conceived as accumula¬ ted in the point 0, and as adfing on the point O,. and it will have the fame tendency to feparate the two cohering furfaces as when each fibre is hanging by its refpedtive point. For this reafon the point O may be called the centre of a3ual effort of the unequal forces of cohefion. The momentum there¬ fore, or energy by which the cohering furfaces are feparated, will be properly meafured by the weight of the folid dJdaa multiplied by OA; and this produd is equal to the produdi of the weight p multiplied by BA, or by / . I hus fuppofe that the cohefion along the line AD only is con- fidered. The whole cohefion will be reprefented by a.tri¬ angle A D d. d reprefents /, and AD is d, and AD is x. Therefore A D is \fd. The centre of gravity 0 of the triangle A D ^ is in the interfe&ion of a line drawn from A to the middle of D d with a line drawn from d to the middle of AD ; and therefore the line 0 0 will make AO — y of A D. Therefore the adtual momentum of cohefion isfXidX^d, = fXdX\dy z=ifdX\d, or equal to the abfolute cohefion a&ing by means of the lever —-. If the fe&ion of fradlure is a retlangle, as in a common joift, whofe breadth a a\^ ^l} it is plain that all the vertical lines 6 ] S T R will be equal to AD, and their cohefions will be reprefented Strength by triangles like A D^; and the whole adtual cohefion Materml will be reprefented by a wedge whofe bafes are vertical ” planes, and which is equal to half of the parallelepiped AD X D X 0 0, and will therefore be=l-/dr/; and the diftance A O of its centre of gravity from the horizontal line A A' will be \ of A D. The momentum of cohefien of a joift will therefore be \f b dX\d, or jb d\d, as we have determined in the other way. *1 he beam reprefented in the figure is a triangular prifm. The pyramid D 0 0 d is y of the prifm a a T) d a'd. If we make s reprefent the iurface oi the triangle a D 0, the pyra¬ mid is 4 of/T The diftance AO of its centre of gravity from the horizontal line A A1 is 4 °f A D, or 4 d. 1 here- fore the momentum of adlual cohefion is 4/y X 4 d, —fs\- df that is, it is the fame as if the full cohefion of all the fibres were accumulated at a point I whofe diftance trpm A is g-th of AD or d ; or (that we may fee its value in every point of view) it is the momentum or the full coheiiou ot all the fibres when accumulated at the point D, or acting at the diftance d = AY). This is a very convenient way of conceiving the momen¬ tum of adlual cohefion, by compaiing it with the mo¬ mentum of abfolute cohefion applied at the diftance AD from the axis of fra&ure. The momentum of the abfo¬ lute cohefion applied at D is to the momentum of adlual cohefion in the inftant of fradlure as AD to AI. . f here- fore the length of AI, or its proportion to AD, is a fort of index of the ftrength of the beam. We fhall call it the Index, and exprefs it by the fymbol i. Its value is eafily obtained. The produdt of the abfolute cohefion by AI mull be equal to that of the actual coheiion by AO. Therefore fay, “ as the prifmatic folid a a Y) dd a' is to the pyramidal folid 0 0 D J, fo is AO to A 1.” We are aftiited in this determination by a very con¬ venient circumftance. In this hypothefis of the adlual co¬ hefions being as the diftances of the fibres from A, the point O is the centre of ofcillation or percuffion of the iur¬ face D 0 0 turning round the axis 0 0: for the momentum of\ cohefidn of the line F F is F F X I ./X E A = F 1’ X E A2, becaufe F/ is equal to E A. Now A O, by the nature of the centre of gravity, is equal to the fum of all thefe mo¬ menta divided by the pyramid a a Yd d’, that is, by the fuin of all the F F X Ff; that is, by the fum of all the FI XE A. fum of F F X E A* , . , . . a , Therefore AO ="h‘ch 18 J"11 the value of the diftance of the centre of percuffion of the triangle 00D from A: (See Rotation). Moreover, if G be the centre of gravity of the triangle 0 D 0, we fhall have D A to G A as the abfolute cohefion to the fum of the cohefions adlually exerted in the inftant of fradlure; for, by the nature of this centre of gravity, A G is equal to fumofrrxEA and the fuB of F F x AG is equal fum of F F ’ to the fum of FF X E A. But the fum of all the lines F F is the triangle 0 D 0, and the fum of all the F F X E A. is the fum of all the re&angles F F//; that is, the pyramid dY) a a. Therefore a prifm whofe bafe is the triangle 0 D 0, and whofe height is AG, is equal to the pyramid, or wih exprefs the fum of the adlual cohefions ; and a prifm, whofe bafe is the fame triangle, and whofe height is Yd d or D 0, expreffes the abfolute cohefion. I herefore D A is to G A as the abfolute cohefion to the fum of the a&ual cohefions. Therefore we have DA:GA — OA:IA. Therefore, whatever be the form of the beam, that is, whatever be the figure of its fedlion, find the centre of ofcillation O, and the centre of gravity G of this ftajon. S T R [ 17 3 S T R Jtrength of Call their diftances from the axis of frafture 0 and g. Then and the momentum of cohefion is/j X ■Materials. AI or i = °_£ d ' d where s is the area of fiafture. This index is eafily determined in all the cafes which generally occur in praftice. In a re&angular beam A I is ^d ©f AD ; in a eylinder (circular or elliptic) AI is rVll18 AD, &c. &c. In this hypothefis, that the cohefion aftually exerted by each fibre is as its extenfion, and that the extenfions of the fibres v'e as their diftancesfrom A (fig. 5. n° 1.), it is plain that tne forces exerted by the fibres D, E, &c. will be repre- fented by the ordinates D E e, &c. to a ftraight line A d. And we learn from the principles of Rotation that the centre of percuffion O is in the ordinate which palfes through the centre of gravity of the triangle A D t/, or (if we confider the whole f°6lion having breadth as well as depth) through the centre of gravity ©f the folid bounded by the planes DA, d A ; and we found that this point O was the centre of effort of the cohefions adually exerted in the inftant of frafture, and that I was the centre of an equal momentum, which would be produced if all the fibres were accumulated there and exerted their full cohefion. This conlideration enables us to determine, with equal facility and neatnefs, the ftrength of a beam in any hypothe¬ fis of forces. The above hypothefis was introduced with a cautious limitation to moderate ftrains, v/hich produced no permanent change of form, or no fett as the artifts call it: and this fuffices for all purpofes of praftice, feeing that it would be imprudent to expofe materials to more violent firains. But when we compare this theory with experi¬ ments in which the pieces are really broken, confiderable deviations may be expected, becaufe it is very probable that in the vicinity of rupture the forces are no longer pro¬ portional to the extenfions. That no doubt may remain as to the juftnefs and com- men m P^etene^s °f theory, we muft fhow how the relative may1 bede- ftren£th may be determined in any other hypothefis. There- termined f°re fuppofe that it has been eftablifhed by experiment on by any o- any kind of folid matter, that the forces a&ually exerted in lhdbhyP°" the.1'nftant of- fra&ure by the fibres at D, E, &c. are as the -ordinates D d'> E watchmaker. The moft delicate oblem in pra&ical me¬ chanics is fo to taper the balance-fpring of a watch that its wide and narrow vibrations may be ifochronous. Hooke s principle ut tenfioJlc vis is not lufficient when v\e take the inertia and motion of the fpring itfelt into the account, ft he figure into which it bends and unbends has alfo an influence. Our readers will take notice that the artift aims at an ac¬ curacy which will not admit an error of and that Harrrfon and Arnold have actually attained it in feveial in- ftances. The taper of a fpring is at prefent a noftrum in the hands of each artift, and he is careful not to impart his fecret. , . , Again, fince the depth of the beam is thus proportional to the radius ©f ultimate curvature, this ultimate or bi cak¬ ing curvature is inverfely as the depth. It may be expreffed When a weight is hung on the end of a prifmatieT© what beam, the curvature is nearly as the weight and the kn^th th^curva. diredlly, and as the breadth and the cube of tL,_ lepth in- porljonap verfely; for the ftrength is =/-7-. Let us fuppofe that Now let the beam this produces the ultimate curvature ^ be loaded with a fmaller weight w, and let the curvature pro- b d* 1 , duced be C, we have this anaIogy/-j7- : ™ — 7-: C, and C —. is evident that this is alfo true of a beam fuppoited at the ends and loaded between the props ; and we fee how to determine the curvature in its different pails* whether arifing from the load, or from its own weight, or from both. . When a beam is thus loaded at the end or middle^ the 68 )efle6tion S T R C . ^9. 1 tr«n^h of loaded point is pulled down, and the fpace through which ftiufes of Europe. Materials. ^ j'g drawn may be called the deflection. This may be confidered as the fub-tenfe of the angle of contact, or as the verfed fine of the arch into which the beam is bent, and is therefore as the curvature when the length of the arches is given (the flexure being moderate), and as the fquare of the length of the arch when the curvature is given. The de¬ flection therefore is as the curvature and as the fquare of • 3 ^ w the length of the arch jointly ; that is, as X /% or as 2 ft tlU The defledion from the primitive flrape is there- fbch fore as the bending weight and the cube of the length di- Cg redly, and as the breadth and cube of the depth inverfely. ’he then- In beams juft ready to break, the curvature is as the invcl'fely> and the defledion is as the fquare of the hf* fuhjeft ^ength divided by the depth ; for the ultimate curvature at iford the the breaking part is the fame whatever is the length ; and neft me- in this cafe the defledion is as the fquare of the length, hods of ex- \yc ]iave ^ more particular in our confideration relawfof fuhjed, becaufe the refulting theorems afford us the ^rpufeuiar hneft methods of examining the laws of corpufcular adion, ftion. that is, for difeovering the variation of the force of cohelion by a change of diftance. It is true it is not the atomical law, or Hylarchic Principle as it may juftly be called, which is thus made acceffible, but the fpecific law of the particles of the fubftance or kind of matter under examina¬ tion. But even this is a very great point; and coinciden¬ ces in this refped among the different kinds of matter are of great moment. We may thus learn the nature of the corpufcular adion of different fubftances, and perhaps ap¬ proach to a difeovery of the mechan'ifm of chemical affini¬ ties. For that chemical adions are infenfible cafes of local motion is undeniable, and local motion is the province of mechanical dilcuffion; nay, we fee that thefe hidden changes are produced by mechanical forces in many impor¬ tant cafes, for we fee them promoted or prevented by means purely mechanical. The converfion of bodies into elaftic vapour by heat can at all times be prevented by a fujjicient external preffure. A ftrong folution of Glauber’s fait will congeal in an inftant by agitation, giving out its latent beat; and it will remain fluid for ever, and return its latent heat in a clofe velfel which it completely fills. Even wa¬ ter will by fuch treatment freeze in an inftant by agitation, or remain fluid for ever by confinement. We know that heat is produced or extricated by fridion, that certain compounds of gold or filver with faline matters explode with irrehftible violence by the fmalleft preffure or agita¬ tion. Such fads fhould roufe the mathematical pliilofo- pher, and excite him to follow out the conjectures of the il- luftrious Newton, encouraged by the ingenious attempts of Bofcovich; and the proper beginning of this ftudy is to attend to the laws of attraction and repulfion exerted by the particles of cohering bodies, difcoverable by experiments made on their adual extenfions and compreffions S T K The cycloid, the catenaria, the elaftic Strength of Curve, the velaria, the cauftics, were reckoned an abundant recompenfe for much ftudy ; and James Bernoulli requefted, ¥ J as an honourable monument, that the logarithmic fpiral might be inferibed on his tombftone. The reward for the ftudy to which we now prefume to iricite the mathemati¬ cians is the almoft unlimited extenfion of natural fcience, important in every particular branch. To go no further than our prefent fubjed, a great deal of important pradi- cal knowledge refpeding the ftrength of bodies is derived from the fingle obfervation, that in' the moderate exten- Irons which happen before the parts are overftrained the forces are nearly in the proportion of the extenfions or fepa« rations ©f the particles. To return to our fubjed. James Bernoulli in his fecound differtation on the elaftic Bernoulli curve, calls in queftion this law, and accommodates his in-calls,!n veftigation to any hypothefis concerning the relation of the forces and extenfions. He relates fome experiments of lute firings where the relation was confiderably different. Strings of three feet long, Stretched by 2, 4, 6, 8, 10 pds. Were lengthened 9, 17, 23, 27, 30 lines. But this is a moft exceptionable form of the experiment. The firings were twifted, and the mechanifm of the extenfions is here exceedingly complicated, combined with compreffions and with tranfverfe twifts, &c. We made experiments on fine flip* of the gum caoutchouc, and on the juice of the berries of the white bryony, of which a fingle grain will draw to a thread of two feet long, and again return into a perfedly round fphere» ' We meafured the diameter of the thread by a microfcope with a micrometer, and thus could tell in every Hate of extenfion the proportional number of particles in the fedlions. We found, that though the whole range in which the diftance of the particles was changed in the proportion of 13 to 1, the extenfions did not fmjibly deviate from the pro¬ portion of the forces. The fame thing was obferved in the caoutchouc as long as it perfe&ly recovered its firft dimen- fions. And it is on the authority of thefe experiments that we prefume to announce this as a law of nature. 7* Hr Robert Hooke was undoubtedly the firft who attend-Which was ed to this fubjeft, and affumed this as a law of nature. Mariotte indeed was the firft who exprefsly ufed it for Hooke, termining the ftrength of beams : this he did about the 1679, correcting the fimple theory of Galileo. Leibnitz indeed, in his differtation in the A8a Erudtiorum 1684 de Rejijlentia Solidorum, introduces this confideration, and wifhes to be confidered as the difeoverer; and he is always acknowledged as fuch by the Bernoullis and others who adhe¬ red to his peculiar doftrines. ButMarriotte had publiflied the doftrine in the moft exprefs terms long before ; and Bulfin- ger, in the Comment. Petropol. 1729, completely vindicates his claim. But Hooke was unqueftionably the difeoverer of this law. It made the foundation of his theory of fprings, announ¬ ced to the Royal Society about the year 1661, and read in 1666. On this cccafion he mentions many things on the ftrength of bodies as quite familiar to his thoughts, which are immediate dedudions from this principle; and among The ex- penments of fimple extenfions and compreffions are quite - «... r .r„ , in u cient, becaufe the total ftretching of a wire is fo fmall, thefe all the fads which John Bernoulli fo vauntingly adduces a quantity, that the miftake of the loocth part of an inch in fupport of Leibnitz’s finical dogmas about the force of bo- occahons an irregularity which deranges any progreflion fo as to make it ufelefs. But by the bending of bodies, a 1 enfion of T55th of an inch may be eafily magnified in the defleClion . of the fpring ten thoufaad times. We know that the inveftigation is intricate and difficult, but not beyond the reach of our prefent mathematical attainments ; vei7 ^ne opportunities of employing all the C 8 ? analyfis. In the lait century and the beginning of t e prefent this was a fufficient excitement to the firft ge- dies in motion ; a dodtrine which Hooke might have claimed as his own, had he not perceived its frivolous inanity. But even with this firft correction of Marriotte, the me- • • J corrected chanifm of. tranlverfe ftram is not fully nor juftly explain-jviari- ed. The force adting in the diredtion BP (fig. 5. n° 1.), andotteitdoe* bending the body ABCH, not only ftretches the fibres onjlot proper, the fide oppofite to the axis of fradture, but compreffes thej^**^1^ fide AB, which becomes concave by the {train. Indeed itnifm 0f cannot do the one without doing the other; For in order tranfverfs C 2 tohrain, S T R r 2° 1 , Strength nf to ftretch the fibres at D, there mud be Come fulcrum, feme quite accidental Materials. fUpport, on which the virtual lever BAD may prefs, that * it may tear afunder the ftretched fibres. I his fulcrum xnuft. fuftain both the preffure arifing from the cohefion of the diftended fibres, and alfo the aftion of the external force, which immediately tends to caufe the prominent part of the beam to Hide alon.j the fe&ion DA. Let BAD (fig- S’ n° I-) fie confidered as a crooked lever, of which A is the fulcrum. Let an external force be applied at B in the dire&ion BP, and let a force equal to the accumu¬ lated cohefion of AD be applied at O in the dire&ion op- pofite to AB, that is, perpendicular to AO ; and let thefe two forces be fuppofed to balance each other by the inter¬ vention of the lever. In the hrlt place, the force at O muft. foe to the force at B as AB to AO : Thetefore, if we make AK equal and oppofite to AO, and AL equal andoppofite to AB, the common principles of mechanics inform us that the fulcrum A is affe&ed in the fame manner as if the two forces AK and AL were immediately applied to it, the force AK being equal to the weight P, and AL equal to the accumulated cohefion actually exerted in the inftant of fra&ure. The fulcrum is therefore really preffed in the dire&ion AM, the diagonal of the parallelogram, and it muft refill in the dire&ion and with the force MA ; and this power of refiftance, this fupport, muft be furnilhed by the repulfive forces exerted by thoje particles only which are in a ftate of a&ual compreffion. The force AK, which is, equal to the external force P, muft be refilled in the direc¬ tion KA by the lateral cohefion of the whole particles between D and A (the particle D is not only drawn forward but downward). This prevents the part CDAB 73 from Hiding down along the fedtion DA. As is fully This is fully verified by experiment. If we attempt to Hip of cork, or any fuch very compreflible experi-1 ^ break a long ment body, we always obferve it to bulge out on. the concave fide before it cracks on the other fide. If it is a body of fibrous or foliated texture, it feldom fails fplintering off on the concave fide ; and in many cafes this fplintering is very deep, even reaching half way through the piece. In hard and granulated bodies, fuch as a piece of freellone, chalk, dry clay, fugar, and the like, we generally fee a confiderable fplinter or Ihiver fly off from the hollow fide. If the frac¬ ture be flowly made by a force at B gradually augmented, the formation of the fplinter is very diftin&ly feen. It forms a triangular piece like a \ b, which generally breaks in the middle. We doubt not but that attentive obferva- tion would fliow that the dire&ion of the crack on each fide of I is not very different from the dire&ion xAM and its correfpondent ©n the other fide. This is by no means a circumftance of idle curiofity, but intimately conne&ed with the mechanifm of cohefion. Let us fee what confequences refult from this ftate of the cafe refpe&ing the ftrength of bodies. Let D A KC (fig. 6.) reprefent a veitical fe&ion of a prifm of comprefiible mate- ef the cafe, rials, fuch as a piece of timber. Suppofe it loaded with a weight P hung at its extremity. Suppofe it of fuch a con- ftitution that all the fibres in AD are in a ftate of dilata¬ tion, while thofe in A a are in a ftate of compreflion. In the inftant of fra&ure the particles at D and E are with-held by forces D 54> anc^ 5^ pounds ; the mean of which is 51. He cut other four i through, and they were broken by 47, 49, 5^’ 4b> mean of which is 4b- I he remaining four were cut yds; and their mean ftrength was 42. Another fet of his experiments is flill more remarkable. Six battens of willow 36 inches long and It fquare were broken by 525 pounds at a medium. Six bars were cut yd through, and the cut filled with a wedge ©f hard wood fluck in with a little force: thefe broke with 551. Six bars were cut half through, and the cut was filled in the fame manner : they broke with 542- Six bars were cut |ths through : thefe broke with 530. A batten cut |ths through, and loaded till nearly broken, was unloaded, and the wedge taken out of the cut. A thicker wedge was put in tight, fo as to make the batten ftraight again by filling up the fpace left by the compref- fion of the wood : this batten broke with 577 pounds. From this it is plain that more than yds of the thicknefs (perhaps nearly ^ths) contributed nothing to the ftrength. The point A is the centre of fra&ure in this cafe j and ia order to eftimate the ftrength of the piece, we may fup- - " pole S T R r rength cfpofe that the crooked lever virtually concerned in the ftrain tatcrials. WTe mult find the point I, which is the centre ' of effort of all the attractive forces, or that point where the full cohefion of AD mult be applied, fo as to have a mo¬ mentum equal to the accumulated momenta of all the variable forces. We mud in like manner find the centre of effort i of the repulfive or fupporting forces exerted by the fibres lying between A and It is plain, and the remark is important, that this lafl centre of effort is the real fulcrum of the lever, although A ts the point where there is neither extenfion nor contraction; for the lever is fupported in the fame manner as ii the repul- fions of the whole line A A were exerted at that point. There¬ fore let S reprefent the furface of fracture from A to D, and y reprefent the abfolute cohefion of a fibre at D in the in- ftant of fracture. We {hall haveyS X I -f- < — p /, or I: I *+■ 1 =/S :p ; that, is, the length AB is to the diltance be¬ tween the two centres of effort I and /, as the abfolute cohe- fion of the feftion between A and D is to the relative ftrer.gth of the feddion. It would be perhaps more accurate to make AI and At equal to the diftances of A from the horizontal lines pafling through the centres of gravity of the triangles dAD and $ A It is only in this conftru&ion that the points I and 1 are the centres of real effort of the accumulated at- tra&ions and repulfions. But I and i, determined as we have done, are the points where the full, equal, a&ions may be all applied, fo as to produce the fame momenta. The final refults are the fame in both cafes. The attentive and duly informed reader will fee that Mr Bulfinger, in a very elaborate differtation on the ftrength of beams in the Com¬ ment. Pet I opolihm. 1729, has committed feveral mi Hakes in his eflimation of the aftions of the fibres. We mention this becaufe his reafonings are quoted and appealed to as autho¬ rities by Mufchenbroek and other authors of note. The fobjecl has been confidered by many authors on the conti¬ nent. Wc recommend to the reader’s perufal the very mi¬ nute difcuflions in the Memoirs of the Academy of Paris for 1702 by Varignon, the Memoirs for 1708 by Parent, and particularly that of Coulomb in the Mem. par let Spavans £trangers, tom. vii. It is evident, from what has been far'd above, that if S and s reprefent the furfaces of the feftions above and below A, and ir o- and^ are the difiances of their centres of gravity from A, and O and 0 the dittances of their centres of ofcil- lation, and D and d their whole depths, the momentum of cohefion will be /S-G-0 76 ns confe- encefar- :r ex. uncd. ±1 D T d -pi. If (as is moft likely) the forces are proportional to the extenlions and compreffions, the diftances AI and At, which Gr*0 ^ are refpeaively = and are refpeaively = 4 D A, and y a A ; and when taken together are = 4 D A. moreover, the extenfions are equal to the compreflions in the* mftant of fraaure, and the body is a reaangular prifm like a common joift or beam, then DA and a A are alfo equal; and therefore the momentum of cohefion is fby.-d fbd* J d, — —, — f b dy,^ d =r pi. Hence we obtain this analogy, “ Six times the length is to the depth as the ablolute cohefion of the feaion is to its relative ftrength.” Phus we fee that the compreflibibty of bodies has a very great influence on their power of withftanding a tranfverfe ftrain. _ We fee that in this moft favourable fuppofition of equal dilatations and comprefiions, the ilrength is reduced to one half of the value of what it would have been had * ie been incoropreffible. This is by no means 21 ] S T R obvious; for it does not readily appear how compreilibi-Strength of lity, which does not diminifh the cohefion of a Angle i-MaCemly fibre, fliould impair the ftrength of the whole. The v—i> reafon, however, is fufhciently convincing when pointed out. In the inftant of frafture a imaller portion of the fec- tion is actually exerting cohefive forces, while a part of it is only ferving as a fulcrum to the lever, by whofe means the ftrain on the feftion is produced. We fee too that this ' diminution of ftrength does not fo much depend on the fen- fible compreffibility, as on its proportion to the dilatability by equal forces. When this proportion is fmall, A a is fmall in comparifon of AD, and a greater portion of the whole fibre is exerting attra&ive forces. The experiments already mentioned of Du Hamel de Monceau on battens of willow fhow that its cempreffibility is nearly equal to its dU latability. But the cafe is not very different in tempered fteel. The famous Harrifon, in the delicate experiments which he made while occupied in making his longitude watch, difeovered that a rod of tempered fteel was nearly as much diminifhed in its length as it was augmented by the fame external force. But it is not by any means certain, that this is the proportion of dilatation and compreftiora which obtains in the very inftant of frafture. We rather imagine that it is not. The forces are nearly as the dilata¬ tions till very near breaking ; but we thinklhat they dimi¬ nifh when the body is juft going to break. But it feems certain that the forces which refill comprefiion increafe faft- er than the compreflions, even before frafture. We know inconteftably that the ultimate refiftances to comprefiion are infuperable by any force which we can employ. The re¬ pulfive forces therefore (in their whole extent) increafe fafter," than the compreflions, and are expreffed by an affyniptotiV branch of the Bofcovician'curve formerly explained. It is therefore probable, eipecially in the more limple fubftancesc, that they inefeafe fafter, even in fuch compreflions as fre¬ quently obtain in the breaking of hard bodies. We are difpofed to think that this is always the cate in fuch bodies as do not fly off in fplinters on the concave fide ; but this muft be underftood with the exception of the permanent changes which may be made by compreflion, when the bo¬ dies are crippled by it. This always increafes the dompref- fion itfelf, and caufes the neutral point to fhift ftill more to¬ wards D. lire effect of this is fometimes very great and fatal. Experiment alone can help us to difeover (he proportion between the dilatability and comprefiibility of bodies. The ftrain now under confiderafion feems the beft calculated foe this refearch. Thus if we find that a piece of wood an inclt fquare requires (2,000 pounds to tear it a funder by a dire£fc pull, and that 200 pounds will break it tranfverfely by a£t- ing 10 inches from the fe&ion of fradure, we muft con¬ clude that the neutral point A is in the middle pf the depth, and that the attradive and repulfive forces are eqyal. Any notions that we can form of the conftitution of fuch fibrous, bodies as timber, make us imagine that the fenfible compref¬ fions, including what arifes from the bending up of the com- preffed fibres, is much greater than the real corpufcular ex- - tenfions. One may get a general convidion of this unex- peded propofition by refleding on what muft happen du¬ ring the fradure. An undulated fibre can only be drawn ftraight, and then the corpufcular extenfion begins ; but it. may be bent up byr compreflion to any degree, the corpuf¬ cular compreflion being little affeded all the while. This- obfervation is very important; and though the forces of corpufcular repulfion maybe almoft infuperable by anycom- preffion that we can employ, a fenfible compreflion may be produced by forces not enormous, fuflieient to cripple the. beam. Of this we Ihsll fee very important inftances after- • wards. Ik S T ft [ 2 Strength of Tt dcferves to be noticed, that although the relative ,Ma emls. ^iengt:tl 0f a priTmatic folid is extremely different in the three hypothefes now conlidered, yet the proportional The pro- ft lengths of different pieces follow the fame ratio ; namely, portional the dire& ratio of the breadth, the diredf ratio of the fquare ilrengtns ofQf the depth, and the inverfe ratio of the length. In the pieces f 1- hrft hypothefis (of equal forces) the ftrength of a rectangular J()W J) (fo # fame ra- beam was -—j ; in the fecond (of attractive forces propor- £'0 ^ ^ f b (fa tional to the extenfions) it was-'-—; and in the third (equal 3 / attractions and repulfions proportional to the extenfions and fbd* f b ik . compremons) it was > or more generally yy> where m exprefies the unknown proportion between the attractions and repullions eorrefponding to an equal extenlion and com- y3 preffion. ‘Tfhe Hence we derive a piece of ufeful information, which is ftrtngth^of conf5rmej gy vrnexcepted experience, that the ftrength pends chief-a-piece depends chiefly on its depth, that is, on that di- ly on its depth. 79 And there¬ fore a in which the cohe* id on is op* .jtofed to the flrarn* menlion which is in the direction of the {train. A bar of timber of one inch in breadth and two inches in depth is four times as ftrong as a bar of only one inch deep, and it is twice as ftrong as a bar two inches broad and one deep ; that is, a joift or lever is always ftrongeft when laid on its ■edge. There is therefore a choice in the manner in which the choice in cohefian is oppofed to the ftrarn. The general aim muft be the manner put the centre of effort I as far from the fulcrum or the neutral point A as poffible, fo as to give the greateft energy or momentum to the coheflon. Thus if a triangular bar projecting from a wall is loaded with a weight at its extre¬ mity, it will bear thrice as much when one of the hides is mppermoft as when it is undermoft. The bar of fig. 5. nB 2. would be three times as ftrong if the fide AB were upper- moft and the edge DC' undermoft. Hence it follows that the ftrongeft ioift that can be cut ■clt joiithas . » ^ *iot the Qtrt of a round tree is not the one which has the greatelt greateft quantity of timber in it, but fuch that the produft of its quantity of breadth by the fquare of its depth Ihall be the greateft pof- Jible. Let A BCD (fig. 7.) be the fe&ion of this joift in- fcribed in the circle, AB being the breadth and AD the depth. Since it is a reftangular feftion, the diagonal BD is a diameter of the circle, and BAD is a right angled tri¬ angle. Let BD be called a, and BA be called x ; then AD is = Vc?—sc2. Now we muft have AB X AD2, «r xXaz — x1, or a* x — x3, a maximum. Its fluxion Ma-triali, 2 3 S T R diameters and C the centre. Draw BD pcrpendiculai* to Strength of BC, and join DC. Then, becaufe BD2 —CD2 — CB% BD is the radius of a circle containing the fame quantity of matter with the ring. If we eftimate the ftrength by the firft hypothefis, it is evident that the ftrength of the'tube will be to that of the folid cylinder, whofe radius is BD, as BD2 X AC to BDZ X BD ; that is, as AC to BD : for BD2 expreffes the cohefion of the ring or the circle, and AC and BD are equal to the diftances of the centres of ef¬ fort (the fame with the centres of gravity) of the ring and circle from the axis of frafhire. The proportion of thefe {Lengths will be different in the other hypothefes, and is not ealily expreffed by a general formula ; but in both it is ftill more in favour of the ring or hollow tube. The following very fimple folution will be readily un- derftood by the intelligent reader. Let O be the centre of ofcillation of the exterior circle, 0 the centre of ofcillation of the inner circle, and iu the centre of ofcillation of the ring included between them. Let M be the quantity of furface of the exterior circle, m that of the inner circle, and that of the ring. M-FO—rc-Fo 5FC2 -4-EC' We have F w — , = 717n h- 41 C and the ftrength of the ring __ yV X F ‘iu and the ftrength of the fame quantity of matter in the form of a folid cylinder is/-* X BD ; lo that the ftrength of the ring is to that of the folid rod of equal weight as F w to B D, or nearly as FC to BD. This will eafily appear by recollecting that FO is = (fee Rotation), and that the mo* Fo FC x—-3X2 x muft be made = 0, or a1 =. 3 x% or x2 = -i. 3 If therefore we make DE = ^ DB, and draw EC perpen¬ dicular to BD, it will cut the circumference in the point C, which determines the depth BC and the breadth CD. Becaufe BD : BC = CD : CE, we have the area of the feftion BC'CD — BD’CE. Therefore the different fec- tions havrag the fame diagonal BIO are proportional to their heights CE. Therefore the feftion BCDA is lefs than the fedtion BrD o, whofe four fides are equal. The joift fo fhaped, therefore, is both ftronger, lighter, and s t cheaper. A hollow The ftrength of A BCD is to that of <7 B it D as ic,coo iubeflrong-to 9186, and the weight and expence as 10,000 to 10,607; er than a fG that ABCD is preferable to 0 B c D in the proportion of ecn'atmn0 * IO’^°7 to 9*^6, or nearly 1 15 to too. the fame From the fame principles it follows that a hollow tube is quantity of ftronger than a folid rod containing the fame quantity of matter, matter. Let fig. 8. reprefent the fedlion of a cylindric . tube, of which AF and BE are the exterior and interior mentum of cohefion is for the inner 2FC 2 circle, &c. * Emerfon has given a very inaccurate approximation to this value in his Mechanics) qto. This property of hollow tubes is accompanied alfo with And mart greater ftiffnefs ; and the fupcriority in ftrength and ftiffnefs is fo much the greater as the furrounding ihell is thinner in proportion to its diameter. Here we fee the admirable wifdom of the Author ofjjenccthe nature in forming the bones of animal limbs hollow. The wiflom of bones of the arms and legs have to perform the office of le-kodin vers, and are thus oppofed to very great tyanfverfe ftrains. By this form they become incomparably ftronger and Itifter, hojow. and give more room for the inleYtion of rr-ufcles, while they are lighter and therefore more agile ; and the fame WH- dom has made ufe of this hollow for other valuable purpofes of the animal economy. In like manner the quills in the wings of birds acquire by their thinneis the very great ftrength which is neceffary, while they are fo light as to give fufficient buoyancy to the animal in the rare medium in which it mult live and fly about. The ftalks of many plants, fuch as all the graffes, and many reeds, are in like manner hollow, and thus poffefs an extraordinary ftrength. Our belt engineers now begin to imitate nature by making many parts of their machines hollow, fuch as their axles ot caft iron, &c. ; and the ingenious Mr Ramfden now makes the axes and framings of his great aitronomical inftruments in the fame manner. In the fuppolltion of homogeneous texture, it is plain that the fradture happens as foon as the particles at D are feparated beyond their utmoft limit of cohefion. This is a determined quantity, and the piece bends till this degree of extenfion is produced in the outermoft fibre. It follows, that the fmalkr we fuppofe the diftance between A and D, the Fip- 84 How a S T R fa tj ^ ,, <5ti,enjth of tKc greater will be the curvature which the beam will ac- 1* Material}. qU{re before it breaks. Greater depth therefore makes a ^ ' * beam not only ttronger but alfo ftiffer. But if the parallel fibres can Aide on each other, both the ftrength and the ftiffnefs will be diminifhed. Therefore if, inftead of one beam D ^ KC, we fuppofe two, DABC and A a KB, not cohering, each of them will bend, and the extenfion of the „ fibres AB of the under beam will not hinder the compref- compound flon ^ ^e adjoining fibres AB of the upper beam. The beam may two together therefore will not be more than twice as fee formed, firong as one ef them (fuppofing DA = A a) inilead of being four times as flrong ; and they will bend as much as either of them alene would bend by half the load. This may be prevented, if it were poflible to unite the two beams all along the learn AB, fotbat the one fhall not Aide on the other. This may be done in fmall works, by gluing them together with a cement as ftrong as the natural lateral co- hefion of the fibres. If this cannot be done (as it cannot in large works), the Aiding is prevented by joggling the beams together ; that is, by cutting down feveral rectangu¬ lar notches in the upper fide of the lower beam, and making fimilar notches in the under fide of the upper beam, and filling up the. fquare fpaces with pieces ef very hard wood firmly driven in, as reprefented in fig. p. Some employ iron bolts by way of joggles. But when the joggle is much harder than the wood into which it is driven, it is very apt ».o woik loofe, by widening the hole into which it is lod¬ ged. 1 he fame thing is fometimes done by fcarfing tire one upon the other, as reprefented in fig. 9. (^2.); but this waftes more timber, and is not fo ftrong, becaufe the mutual hooks which this method forms on each beam are very apt to tear each other up. By one or other of thefe methods, or fome- thmg fimilar, may a compound beam be formed, of any depth, which will be almoft as iliff and ftrong as an entire piece. On the other hand, we may combine ftrength with pli- ablenefs, by compoiing our beam of feveral thin planks laid on each other, till they make a proper depth, and leaving t icm at full liberty to Aide on each other. It is in this manner that coach-lprings are formed, as is reprefented in g. 10. In this afTemblage there muft be no joggles nor bolts of any kind put through the planks or plates; for this would hinder their mutual Aiding. They muft be kept together by ftraps which furround them, or bv ibme- tning equivalent. The preceding obfervations fhow the propriety of fame maxims of .conltruftion, which the artifts have derived from long experience. Thus, if a mortife is to be cut out of apiece which is ex- po ed to a crofs ftrain, it fhould be cut out from that fide which becomes concave by the ftrain, as in fig. u. but by no means as in fig. 12. j If a piece is to be ftrengtbened by the addition of ano¬ ther, the added piece muft be joined to the fide which grows convex by the ftrain, as in fig. 13. and 14. b t ore we go any farther, it will be convenient to recal the reader s attention to the analogy between the ftrain on a beam projedma from a wall and loaded at the extremity, and a beam fupported at both ends and loaded in feme iu- an^nt T P°w - ?,.,S fufficient on this °ccafion to read attentively what is delivered in the article Roofr, na rq.— We learn there that the ftVain on the middle point C (fig. nortef ^ Prtfent T,cIe> °f a reasn&“lar beam AB, fup- pSeTr0158 ^ u "I B’ 18 the fa-e as part CA weiht W SeiidTd’a" ^ ^ °f the b impended at A. I he momentum of the ftrain “ iWxiAE, „rri. ft I 85 : How I ftrength may he | combined With plia- | feienefs. S6 I Maxims of jeonftruc- I lion. 1 ] S T R The momentum of cohefion mufl be equal to this in every Strength nt hypothefis. Materials, Having now confidered in fufficient detail the circum- * ftances which afFed the ftrength of any fedion of a folid body that i* {trained traniverfely, it is neceflary to take no¬ tice of fome of the chief modifications of the ftrain itfelf. We fiiall confider only thofe that occur moft frequently in our conftrudions. The ftrain depends on the external force, and alfo on the lever by which it ads. It is evidently of importance, that fince the ftrain is ex- Theft^a,'* erted in .any fedion by means of the cohefion of the parts depends ora intervening between the fedioft under confideration and the die exter- point of application of the external force, the body muft benal able in all thefe intervening parts to propagate or excite the ftrain in the remote fedion. In.every part it muft be able to refill the ftrain excited in that part. It Aiould therefore be equally ftrong; and it is ufelefs to have any part ftrong- er, becauie the piece will neverthelefs break where it is not ftronger throughout .; and it is ufelefs to make it ftronger (relatively, to its ftrain) in any part, for it will neverthelefs equally fail in the part that is too weak. buppofe then, in the firft place, that the ftrain arifes from, a weight fufpended at one extremity, while the other end is fiimly fixed in a wall, fcuppoimg alfo the crofs lec¬ tions to be all redangular, there are feveral ways of Aiaping the beam fo that it ftiall be equally ft’rong throughout. T-hus it may he equally deep in every part, the upper and under furfaces being horizontal planes. The condition will be fulfilled by making all the horizontal fedions triangles, as in fig. 15. 7 he two fides are vertical planes meeting in an Ci.ge at the extremity D. lor the equation exprefling the balance offtrain and' ftrength is = fbdx. Tharefore fince d 1 is the fame throughout, and al'fo p, we muft have Jb — l, and b (the breadth AD of any fedion ABCD) muft he proportional to / (or AL), which it evidently is. Or, it the beam be of uniform breadth, we muft have d1' everywhere proportional to /. This will be obtained by making the depths the ordinates of a common parabola, of which L. is the vertex and the length is the axis. The upper.or under fide may be a ftraight line, as in fig. 16. or the middle line may be ftraight, and then both upper and under fur&ces will be curved. It is almoft indifferent what is the ftiape of the upper and under furfaces, provided the- diftances between them in ever/ part be as the ordinates of a common parabola. Or, if the fedions are all fimilar, fuch as circles, fquares, or any other fimilar polygons, we muft have d ' or b * pro¬ portional to /, avid the depths-or breadths muft be as the or¬ dinates of a cubical parabola.. It is evident that thefe are alfo the proper forms for aAndtfn the ever movcaole round a fulcrum, and afted on by a force at form of the toe extremity. The force comes in the place of the weightievers fufpended in the cafes already confidered ; and as fuch levers"^ U always are conneded with another arm, we readily fee that ** both arms fliould be faftiioned in the fame manner. Thus n 1 tPe piece tim,Der ma7 be fuppofed a kind of fteelyard, moveable round a horizontal axis OP, in the front of.the wall, and having the two weights P and ^ in equili- bruv The ftrain.. occasioned by each at the fedion in which the axis OP is placed muft he the fame, and each arm OL. and O x muft be equally ftrong in all its parts. The Ion* gltudirnl fedions of each arm muft be a triangle, a common parabola, or a cubic parabola,, according to the conditions previoufly given. > And, moreover, all thefe forms are equally ftrong : For any one of them is equally ftrong in all its parts, and they aie all fuppofed to have the fame fedion.at the front of the 6 wall s 89 The exter¬ nal ftrain- in^ force may he di- flributed over the beam. Jt wall. T R t H •Str.mt}. of wall or St tlie fulcrum. They are not, however, equally • Materials. 'fhe firft, reprefented in fig. 15. will bend lealt " upon tlie whole, and the one formed by the cubic pai abo a will bend moft. But their curvature at the very fulcrum -will be the fame in all. „ , „ , ... It is alfo plain, that if the lever is of the fecond or third ‘kind, that is, having the fulcrum at one extremity, it mult ftillbe of the fame lhape ; for in abltrad inechamcs it is indifferent which of the three points is confidcred as the axis of motion. In every lever the two forces at the extre¬ mities add in one direction, and the force in the middle acts in the oppofite direction, and the great ftrain is always at - that point. Therefore a lever fuch as fig. 15. moveable round an axis palling horizontally through A, and ailing againft an obffacle at OP, is equally able in all its parts to •refill the ftrains excited in thofe parts. The fame principles and the fame cbnfixtnflion will apply to beams, fuch as joifts, fupported at the ends L and x (fig- 15.), and loaded at fome intermediate part OP.. This will appear evident by merely inverting the directions of the forces at thefe three points, or by recurring to the article Roofs, n° 19. Hitherto we have fuppofed the external {training force as ailing only in one point of the beam. But it may be uni¬ formly dillributed all over the beam. To make a beam in fuch circumftances equally ftrong in all its parts, the lhape mull be conliderably different from the former. Thus fuppofe the beam to project from a wall. 9° If it be of equal breadth throughout, its fides being verti- beamitrong'cal planes parallel to each other and to the length, the ver- which pjo- tical fe&ion in the direftion of its length mull be a triangle jjefts from jnftead of a common parabola ; for the weight uniformly dillributed over the part lying beyond any feilion, is as the length beyond that feilion : and fince it may all be con¬ ceived as colle&ed at its centre of gravity., which is the middle of that length, the lever by which this load a&s or ftrains the feftion is alfo proportional to the fame length. The ftrain on the fe&ion (or momentum of the load) is as the fquare of that length. The fe&ion mull have ftrength an the fame proportion. Its ftrength being as. the breadth and the fquare of the depth, and the breadth being conftant, the fquare of the depth of any fe&ion mull be as the fquare of its diftance from the end, and the depth mull be as. that di- ftance ; and therefore the longitudinal vertical fe&ion mull be a triangle. But if all the tranfverfe fe&ions are circles, fquares, or any other limtlar figures, the llrength of every fe&ion, or the cube of the diameter, mitll be as the fquare of the lengths beyond that fe&ion, or the fquare of its diffance from the end ; and the iides of the beam mull be a femieu- bical parabola. If the upper and under furfaces are horizontal planes, it is evident that the breadth mull be as the fquare of the di- flance from the end, and the horizontal fe&ions may be form¬ ed by arches of the common parabola, having the; length for their tangent at the vertex. By recurring to the analogy fo often quoted between a proje&ing beam and a joift, we may determine the proper form of joitls which are uniformly loaded through their whole length. This is a frequent and important cafe, being the office of joifts, rafters, &g. and there are fome circumftances which mull be particularly noticed, becaule they are not fo obvi¬ ous, and have been nrifunderftood. When a beam AB (fig- x7-) is fupported at the ends, and a weight is laid on any point P, a 'llrain is excited in every part of the beam. The load on P caufes the beam to prefs on A and B, and .the props rea& with forces equal and oppofite to theie 1 S T R nreffures. The load at P is to the preffures at A and B as Strength f,j AB to PB and PA, and the preffures. at A is to that at tVlateml,-| B as PB to PA ; the beam therefore is in the fame ftate, wnth refpe& to' ftrain in every part of it, as if it were reft- ing on a prop at P, and were loaded at the ends with weights equal to the two preffures on. the props : and ob- ferve, thefe preffures are fuch as will balance each other, being inverfely as their diftances from P. Let P reprefent the weight or load at P. The preffure on the prop P mull PA t p y —This is therefore the rea&ion of the prop B, AB and is the weight which we may fuppofe fufpended at B9 when we conceive the beam reding on a prop at P, and car¬ rying the balancing weights at A and B. The drain occafioned at any other point C, by the load P at P, is the fame with the ftrain at C, by the weight p x hanging at B, when the beam refts on P, in the manner now fuppofed; and it is the fame if the beam, in® Head of being balanced on a prop at P, had its part AP fixed in a wall. This is evident. Now we have ihown at . , „ PA, . length that the ftrain at C, by the weight P X ^ ^ hanging PA at B, is P X X BC. We defire it to be particularly remarked that the preffure at A has no influence on the ftrain at C, arifing from the a&ion of any load between A and C ; for it is indifferent how the part AP of the projec¬ ting beam PB is fupported. The weight, at A juft per¬ forms the fame office with the wall in which we fuppofe tire beam to be fixed. We are thus particular, becaufe we have feen even perfons not unaccuftomed to difeuffions of this kind puzzled in their conceptions of this ftrain. Now let the load P be laid on fome point /> between C and B. The fame reafoning Ihows us that the point is (with refpe& to drain) in the fame .ftate as if the beam were fixed in a wall, embracing the part p B, and a weight ^ B , « = P X were hung on at A, P B P X X AC. and the ftrain at C is AB In general, therefore, the llrain on any point C, arifing ^ gener; from a load P laid on another point P, is proportional to propofi. the re&angle of the diilances of P and C from the ends “om PAxCB n /> B X CA neareft to each. It is P X r-?; , or P X _ 91 The ftrain upon a beam fup¬ ported at both ends. AB ’ ~ AB ’ according .as the load lies between C and A or between C and B. Cor. i. The ftrains which a load on any point P occa- fions on the points C, c, lying on the fame fide of P, are as the diftances of thefe points from the end B. In like man¬ ner the ftrains an E and e are as E A and e A. Cor. 2. The ilraiu which a load occafions in the part on which it refts is as the re&angle of the parts on each fide. Thus the ftrain occafioned at C by a load is to that at 1) by the fame load as AC X C1j to AL) X 13 B. It la there¬ fore greateft in the middle. . . 93 Let us now confider the ftrain on any point C arifing The ftra from a load uniformly diftributed along the beam. Let AP be reprefented by x, and P by x, and the whole weight diftrihut on the beam by a- Then a'ong tl J • beaai. The weight on P/> is - = « A B* Preffure on B by the weight on Pp = a JL. x Ali AB Or S T R C trfrgth of Materials - - =5 <3 X X Ab* 4-AC* AC1 Pref. on B by the whole wt. on AC = a~p^"=ZaYK^i> AC2 XBC Strain at C by the weight on AC =: a ———* o . . BC2 X AC Strain at C by the weight on BC ~ a —— ■ it vi • - . AC*xBC4-BC1XAC. iJo. by the whole weight on AB =r a —" ; AB : _ ^ AC X BC X AC-f-CB a 2AB* ’ AC X BC 2AB Thus w'e fee that the ftrain is proportional to the rec¬ tangle of the parts, in the fame manner as if the load a had been laid direltly on the point C, and is indeed equal to one-half of the drain which would be produced at C by the load a laid on there. tiftakes in. wa8 nece^'ary to be thus particular, becaufe we fee iis ful)je6kjn f°me elementary treatifes of mechanics, publifhed by au- immitted thors of reputation, millak.es which are very plaufible, and author# ininead the learner. It is there faid, that the preflure at reputa. from a weight uniformly dilfufed along AB is the lame as if it were collefted at its centre of gravity, which would be the middle of AB ; and then the drain at C is faid to be this prelFure at B multiplied by BC. But furely it is not difficult to lee the difference of thefe drains. It is plain that the preffure of gravity downwards on any point be¬ tween the end A and the point C has no tendency to dimi- nilh the drain at C, arifmg from the upward readfion of the prop B ; whereas the preffure of gravity between C and B is almod in direct oppolition to it, and mud diminifh it. We may however avoid the fluxionary calculus with fafety by the confideration of the centre of gravitv, by fuppoling the weights of AC and BC to be colkaed at their refpedtive centres of gravity ; and the refult of this computation will be the fame as above : and we may ufe either method, al¬ though the weight is not uniformly didributed, provided only that we know in what manner it is didributed. , I his invellfgation is evidently of importance in the prac¬ tice of the engineer and architea, informing them what fup- port is neceifary in the different parts of their conftruc- tions. We confidered fome cafes of this kind in the article 95 Roofs. ult°which r lt is, n.ow ea{y to form a that it fhall have the ay have ^ame drength in all its parts. efame re- f- make it equally able in all its parts to carry a given rivefI, • SU,lald 0n any Poillt C taken at random, or uniformly dfpart” d,ffu/ed °.ver *hc whole knKth> the drength of the feaion 1 1 P -at the point C muft be as AC X CB. Therefore 1. If the fides are parallel vertical planes, the fquare of the depth (which is the only variable dfmenfiori) or CD\ muft1,beras AC X CB, and the depths mult be ordinates of an elhpfe. 2. 11 the tranfverfe feftions are'fimflar, we mud make CD * as AC X CB. £ the AUPper and under Surfaces are parallel, the breadth mud be as AC X CB. II. If the beam is neceffarily loaded at fome given point ’ arlT TUId haVC the beam effually able ^ all its parts to refid the drain anfing from the weight at C, we mud -make the drength of every tranfverfe feaion between C and cither end as its didance from that end. Therefore 11 fldeS are paraIlel vertical Plaiies» mud make CD :KF* = AC; AE. 2. If the feftlons are fimilar, then CDJ ;EF3 — AC:AE. Vol. XVIII. Part l. 25 1 S T R 3. II the upper and under furfaces are parallel, then, length of breadth at C ; breadth at E = AC ; AE. Material#. The fame principles enable us tq determine the drain and ^ drength of fquare or circular plates, of different extent, butThe {train equal thicknefs. This may be comprehended in this generalaiid propofition. ftrength of Similar plates of equal thicknefs fupported all round will carry the lame abfolute weight, uniformly diftributed, orplates of reding on fimilar points, whatever is their extent. \ different Suppofe two fimilar oblong plates of equal thicknefs, ande*tent’ bat let their lengths and breadths be L, /, and B, b. Let their drength or momentum of cohefion be C, r, and the drains may be de- from the weights W, iv, be S, s. termined Suppofe the plates fupported at the ends only, and f‘om the refiding frafture tranfverfely. The drains, being as the^n^.I>rm“ weights and lengths, are as WL and w /,. but their coh«-C plCS’ fion are as the breadths; and fince they are of equal rela¬ tive drength, we have WL : S drength or momentum of cohefion of every feAion mudGeneraf be as the produA of the weight beyond it multiplied by SSL the didance of its centre of gravity. For example : it. b Suppofe the beam DLA (fig. 18.) to projcA from the wall, * p!ate and that its fides are parallel vertical planes, fo that the depth CCCCLXixv‘ is the only variable dimenfion. Let LBzrjc and B b = y The element B £ c C is = y x. Let G be the centre of grai vity of the part lying without B b, and ^ be its diftance from the extremity L. Then x—g is the atm of the lever by which the drain is excited in the feAion B b. Let B b ory be as fome power rw of L B ; that is, lety=xTO. Then xm+i the contents of LB£ is The momentum of gravi¬ ty round a horizontal axis at L is yxx'=xm+'x, and the whole momentum round the axis is D The didance of the S T R [ 26 Strength of the ttntrc of gravity from L Is had by ‘•^s mo Materials x± — mentum by tlic whole weight, which ^ ^ie C^U0 t:ent or g js ¥L”!±L. And the dlflance of the centre m-{-2 rcXtw + i _ of gravity from the fedllon B i Is x m-{-2 > x X w4*2 — 3f X t»+i m-\- 2 ' W+2* Therefore the ftrain on the xm+x feftlon Bi is had by multiplying by ?n_p2*^ ^e^r°" dud Is -==—== . This muft be as the fquare of the 7B + 2XOT+l depth, or as _>>*. But.y is as x'”, as Therefore 99 A conoid equally able in eve j y fed ion to bear its own weight. 100 The more a beam its own Weight. lot Small bo¬ dies moie able to withftand the flrain produced by the weight of the ma- we hare m-j-2=r2tw, and m~'l\ that is, the depth mult be as the fquare of the diftance from the extremity, and the curve L £ A is a parabola touching the horizontal line in L. It is eafy to fee that a conoid formed by the rotation of this figure round DL will alfo be equally able in every fec- tion to bear its own weight. We need not profeeute this farther. When the figure of the piece is given, there is no difficulty in finding the ftrain ; and the circumftance of equal ftrength to refill this ftrain is chiefly a matter of curiofity. It is evident, from what has been already faid, that a pro- jefting beam becomes lefs able to bear its own weight, as it proje<9s>theprojefts farther. Whatever may be the ftrength of the ka[on DA» the lenSth ma? be fuch that Jt Wl11 break by its own weight. If we fuppofe two beams A and B of the fame fubftance and fimilar fhapes, that is, having their lengths and diameters in the fame proportionj and farther fuppofe that the ffiorter can juft bear its own weight; then the longer beam will not be able to do the fame: For the ftrengths of the feftions are as the cubes of the diameters, while the ftrains are as the biquadrates of the diameters; becaufe the weights are as the cubes, and the levers by which thefe weights a£l in producing the ftrain are as the lengths or as the diameters. Thefe confiderations (how us, that in all cafes where the ftrain is affe&ed by the weight of the parts of the machine or ftru&ure of any kind, the fmaller bodies are more able to withftand it than the greater; and there feems to be bounds fct by nature to the fize of machines conftru&ed of any given materials. Even when the weight of the parts of the machine is not taken into the account, we cannot chine ^han en^arge in t^e ^ame ProPorti°n i*1 t^e‘r PartS. great bo- ' Thus a fteam-engine cannot be doubled in all its parts, fo die?. as to be ftill efficient. The preffure on the pifton is qua¬ drupled. If the lift of the pump be alfo doubled in height while it is doubled in diameter, the load will be increafed eight times, and will therefore exceed the power. The depth of lift, therefore, muft remain unchanged; and in this cafe the machine will be of the fame relative ftrength as be¬ fore, independent of its own weight. For the beam being doubled in all its dimenfions, its momentum of cohefion is eight times greater, which is again a balance for a qua¬ druple load adling by a double lever.—But if we now con- fider the increafe of the weight of the machine itfelf, which muft be fupported, and which muft be put in motion by the intervention of its cohefion, we fee that the large ma¬ chine is weaker and lefs efficient than the fmall one. There is a fimilar limit fet by nature to the fize of plants and animals formed of the fame matter. The cohefion of an herb could not fupport it if it were increafed to the fize of a tree, nor could an oak fupport itfelf if 40 or ] S T R eo times bigger, nor could an animal of the make of a Strength r lon^-legged fpider be increafed to the fize of a man; the / articulations of its legs could not fupport it. _ 102 Hence may be underftood the prodigious fuperiority of Even fmal the fmall animals both in ftrength and agility. A man by animals ar falling twice his own height may break his firmeft bones. A moufe may fall 20 times its height without rifle ; and even^ a^Jr. the tender mite or wood-loufe may fall unhurt from the top of a fteeple. But their greateft fuperiority is in refpeft .of nimblenefs and agility'. A flea can leap above 500 times its own length, while the ftrength of the human mufcles could not raife the trunk from the ground on limbs of the fame eonftru£lion. The angular motions of fmall animals (in which confifts their nimblenefs or agility) muft be greater than thofe of large animals, fuppofing the force of the mucfuhr fibre to be the fame in both. For fuppofing them fimilar, the num¬ ber of equal fibres will be as the fquare of their linear di¬ menfions ; and the levers by which they aft are as their linear dimenfions. The energy therefore of the moving force is as the cube of thefe dimenfions. But the momen¬ tum of inertia, or Jp. r% is as the 4th power: Therefore the angular velocity of the greater animals is fmaller.. The number of ftrokes which a fly makes with its wings in a fe- cond is aftonifhingly great} yet, being voluntary, they arc the effedls of its agility. We have hitherto confined our attention to the fimpleft form in which this tranfverfe ftrain can be produced. This was quite fufficient for fhowing us the mechanifm of nature by which the ftrain is refifted ; and a very flight attention is fufficient for enabling us to reduce to this every other w7ay in which the ftrain can be produced. We fhall not take up the reader’s time with the application of the fame principles to other cafes of this ftrain, but refer him to what has been faid in the article Roofs. In that article we have fhown the analogy between the ftrain on the feflion of a beam pro- je&ing from a wall and loaded at the extremity, and the ftrain on the fame fe&ion of a beam fimply refting on fup. ports at the ends, and loaded at fome intermediate point or points. The ftrain on the middle C of a beam AB (fig-19*) fo fupported, arifing from a weight laid on there, is the fame with the ftrain which half that weight hanging at B wopjd produce on the lame fedlion C if the other end of the beam were fixed in a wall. If therefore 1000 pounds hung on the end of a beam projefting 10 feet from a wall will juft break it at the wall, it will require 4000 pounds on its middle to break the fame beam refting on two props jo feat afunder. We have alfo fhown in that article the additional ftrength which will be given to this beam by ex¬ tending both ends beyond the props, and there framing it firmly into other pillars 01 fupports. We can hardly add any thing to what has been faid in that article, except few obfervations on the effefts of the obliquity of the ex-cy0f the ternal force. We have hitherto fuppofed it to a£l in theexternal direftion BP (fig. 6.) perpendicular to the length of theforc€* beam. Suppofe it to aft in the direftion BPr, oblique to BA. In the article Roof we fuppofed the ftrain to be the fame as if the force/) afted at the diftance AB', but ftill perpendi- dicular to AB : fo it is. But the ftrength of the feftion A A is not the fame in both cafes ; for by the obliquity of the aftion the piece DCKa is preffed to the other. We are nofc fufficiently acquainted with the corpufcular forces to fay precifely what will be the effeft of the preffure arifing from this obliquity ; but we can clearly fee, in general, that the point A, which in the inftant of frafture is neither ftretched nor compreffed, muft now be farther up, or nearer a S T R [ : fcengOi pfto I) ; and therefore the number of particles which are ex- Materials. ertjng cohefive forces is fmaller, and therefore the ftrength is diminUhed. Therefore, when we endeavour to proportion the /Irength of abeam to the ftrain ariiing from an external force »£Ung obliquely, we make too liberal allowance by increafing this external force in the ratio of AB to AB. We ac¬ knowledge our inability to affign the proper correction. But this circumftancc is of very great influence. In many ma¬ chines, and many framings of carpentry, this oblique aftion of the ftraining force is unavoidable ; and the moll enor¬ mous drains to which materials are expofed are generally of this kind. In the frames fet up for carrying the ring- ftones of arches, it is hardly poflible to avoid them : for although the judicious engineer difpofes his beams fo as to fuftain only preflures in the direction of their lengths, tend¬ ing either to crufli them or to tear them afunder, it frequent¬ ly happens that, by the fettling of the work, the pieces come to check and bear on each other tranfverfely, tending to break each other acrofs. This we have remarked upon in the article Roofs, with refpedl to a trufs by Mr Price (fee Roofs, n° 40, 41, 45). Now when a crofs ftrain is thus combined with an enormous preflure in the diredtion of the length of the bream, it is in the utmoft danger of fnapping fuddenly acrofs. This is one great caufe of the carrying away of mafts. They are comprefled in the di- redlion of their length by the united force of the Ihrouds, and in this ftate the tranfverfe adlion of the wind foon com¬ pletes the fraCture. i°4 _ When confidering the comprefiing ftrains to which ma- >n columns ter'a^s are exP°fed, we deferred the ditcuflion of the ftrain on columns, obferving that it was not, in the cafes which ufually occur, a Ample comprefllon, but was combined with a tranC- verfe ftrain, arifing from the bending of the column. When the column ACB (fig. 20.) refting on the ground at B, and loaded at top with a weight A, aCting in the vertical direftion AB, is bent into a curve ACB, fo that the tangent at C is perpendicular to the horizon, its condition fomewhat refembles that of a beam firmly fixed between B and C, and ftrongly pulled by the end A, fo as to bend it between C and A. Although we cannot conceive how a force adting on a ftraight column AB in the diredlion AB can bend it, we may fuppofe that the force adled firft in the horizontal di¬ redlion A £, till it was bent to this degree, and that the rope was then gradually removed from the diredlion A ^ to the diredlion AB, increafing the force as much as is neceffary for preferving the fame quantity of flexure. Dbferva- aut^or (we believe) whoconfidered this import- iviis on ant fubjedl with fcrupulous attention was the celebrated Euler, Euler’s the-who publiftied in the Berlin Memoirs for 1757 his Theory 'jy Strength of Columns. The general propofition ;olumns. titabhft^d by this theory is, that the ftrength of prifmatical co¬ lumns is in the diredt quadruplicate ratio of their diameters and the inverfe duplicate ratio of their lengths. He profe- cuted this fubjedl in the Peterfburgh Commentaries for 1778, confirming his former theory. We do not find that any other author has beftowed much attention on it, all feeming to acquiefce in the determinations of Euler, and to confider the iubjedt as of very great difficulty, requiring the application of the moft refined mathematics. Mufchenbioek lias compared the theory with experiment; but the compari- fon has been very unfatisfadtory, the difference from the theoiy being fo enormous as to afford no argument for its juftnefs. But the experiments do not contradidl it, for they we lb anomalous as to afford no conclufion or general rule whatever. .To ky ^ie truth, the theory can be confidered in no Q.">er ight than as a fpecimen of ingenious and very artful raic analyfis, Euler was unqueftionably the firll analylt 7 1 S T R in Europe for refource and addrefs. He knew this, and length enjoyed his fuperiority, and without fcruple admitted any Materials.* phyfical affumptions which gave him an opportunity of dif- v playing his (kill. The inconiiftency of his aflumptions with the known laws of mechanifm gave him no concern ; and when his algebraic proceffes led him to any conclufion which would make his readers ftare, being contrary to all our ufual notions, he frankly owned the paradox, but went on in his analyfis, faying, “ Sed analy/t magis jidendum” Mr Robins has given fome very rifible inftances of this confidence in his analyfis, or rather of his confidence in the indolent fubmif- fion of his readers. Nay, fo fond was he of this kind of amufement, that after having publiflied an untenable Theory of Light and Colours, he publiftied feveral Memoirs, ex¬ plaining the aberration of the heavenly bodies, and deducing fome very wonderful confequences, fully confirmed by expe¬ rience, from the Newtonian principles, which were oppofite and totally inconfiftent with his own theory, merely becaufe the Newtonian theory gave him “ occafionem analyfeos pro- movendx.” We are thus fevere in our obfervations, becaufe his theory of the ftrength of columns is- one of the ftrong- eft inftances of this wanton kind of proceeding, and becaufe his followers in the Academy of St Peterfburgh, fuch as Mr Fufs, Lexill, and others, adopt his conclufions, and merely echo his words. Since the death of Dan. Bernoulli no member of that academy has controverted any thing advan¬ ced by their Profejfor fublimis geometric, to whom they had been indebted for their places and for all their knowledge, having been (moft of them) his amanuenfes, employed by this wonderful man during his blindnefs to make his com¬ putations and carry on his algebraic inveftigations. We are not a little furprifed to fee Mr Emerfon, a confiderable ma¬ thematician, and a man of very independent fpirit, haftily adopting the fame theory, of which we doubt not but our readers will eafily fee the falfity. Euler confiders the column ACB as in a condition pre- cifely fimilar to that of an elaftic rod bent into the curve by a cord AB conne&ing its extremities.—In this he is not miftaken.—But he then draws CD perpendicular to AB, and confiders the ftrain on the fedlion C as equal to the momentum or mechanical energy of the weight A ailing in the direition DB upon the lever nr D, moveable round the fulcrum r, and tending to tear afunder the particles which cohere along the fe&ion rC*. This is the fame principle (as Euler admits) employed by James Bernoulli in his inveftigation of the elaftic curve ACB. Euler confiders the ftrain on the feition r * as the fame with what it would fuftain if the fame power ailed in the horizontal direilion EF on a point E as far removed from C as the point D is. We reafoned in the fame manner (as has been obferved) in the article Roofs, v/here the obliquity of ailion was Inconfiderable. But in the prefent cafe, this fubftitution leads to the greatefl miftakes, and has rendered the whole of this theory falfe and ufelefs. It would be juft if the column were of materials which are incompreffible. But it is evident, by what has been faid above, that by the compreffion of the parts the real fulcrum of die lever ffiifts away from the point r, fo much the more as the compreffion is greater. In the great compreffions of loaded columns, and the almoll unmeafurable compreffions of the trufe beams in the centres of bridges, and other cafes of chief im¬ portance, the fulcrum is fhiited far over towards *, fo that very few fibres refill the fradlure by their cohefion; and thefe lew have a very feeble energy or momentum, on ac¬ count of the Ihort arm of the lever by which they aft. This is a moft important confideration in carpentry, yet makes no element of Euler’s theory. The confequence ot this is, that a very’ frnall degree of curvature is fufficient to caufe the co- D 2 luma S T R C 28 ] S T R Strength oflumn or ftrutt to fnap in an inftant, as is wcllknown to every are called, to flay the middle of long heamt, which are ^nKth j Materials, experienced carpenter. The experiment by Mufchenbroek, employed as pillars, limits, or trufs beams, and are ex- Maten-» which Euler makes ufe of in order to obtain a meafure of pofed, by their pofition, to enormous preffures in the di-^^" ' ftrength in a particular inftance, from which he might de- redlion of their lengths. Such Hays may be obferved, dif- 70fi Th's ther. duce all others by his theorem, is an inconteftable proof of this. The force which broke the column is not the twentieth part of what is necefiary for breaking it by add¬ ing at E in the direction Ei1. Euler takes no notice of this immenfe difcrepancy, becaufe it mull have caufed him to abandon the fpeculation with which he was then amufmg himlelf. The limits of this Work do not afford room to enter ry laife ant) minutely upon the refutation of this theory; but we can vklrti. eafily fhow it3 ufciefsnefS) by itg total inconfillency with common obfervation. It refults legitimately from this theory, that if CD have no magnitude, the weight A can have no momentum, and the column cannot be broken— True,—it cannot be broken in this way, fnapped by a tranf- verfe fradture, if it do not bend ; but we know very well that it can be crulhed or crippled, and we fee this frequent¬ ly happen. This circumflance or event does not enter into Euler’s inveftigation, and therefore the theory is imperfeft at leaft and ufelefs. Had this crippling been introduced in the form of a phyficial affumption, every topic of reafon- ing employed in the procefs mull have been laid afide, as the intelligent reader will ealily fee But the theory is not only imperfedl, but lalfe. The ordinary reader will be con¬ vinced of this by another legitimate confequence of it. Fig. .20. n° 2. is the fame with fig. 106 ot Emerfm’s Mechanics, pofed with great judgment and economy, in the centres em¬ ployed by Mr Perronet in the eredtion of his great llono arches. He was obliged to corredl this omiffion made by his ingenious predeceffor in the beautiful centres of the bridge of Orleans, which we have no hefitation in affirming to be the linell piece of carpentry in the world. It only remains on this head to compare thefe theoretical deductions with experiment. Experiments on the tranfverfe ftrength of bodies are eafily made, and accordingly are very numerous, efpecially thole made on timber, which is the cafe moft common and molt interelling. But in this great number of experiments there are very few from which we can draw much pradtieal infor¬ mation. The experiments have in general been made on fuch fmall fcantlings, that the unavoidable natural inequalities bear too great a proportion to the ftrength of the whole piece. Accordingly, when we compare the experiments of different authors, we find them differ enormoufly, and even the experiments by the fame author are very anomalous. The completeft feries that we have yet leen is that detailed by Belidor in his Science des Jngenieurs. They are contain-experi- ed in the following table. The pieces were found, even-ments grained oak. The column b contains the breadths of the1”^ ^ pieces in inches ; the column d contains their depths ; the 1 0 column / contains their lengths ; column p contains the S T R [ '■enpth ff comparing Experiments ift and 3d, the ftrength ap- tateriak pCar3 proportional to the breadth. ^ Experiments 3d and 4th (hew the ftrength proportional arollarles to the fquare of the depth. duced Experiments ift and 5 th (hew the ftrength nearly in the >01 them, jnverfe proportion of the lengths, but with a feniible de» ficiency in the longer pieces. Experiments 5th and 7th fhew the ftrengths proportional to the breadths and the fquaie of the depth. Experiments ift and 7th fhew the fame thing, compound¬ ed with the inverfe proportion of the length : the deficiency relative to the length is not fo remarkable here. Experiments lit and 2d and experiments 5th and 6th fhew the increafe of ftrength, by fattening the ends, to be in the propoition of 2103. The theory gives the propor¬ tion of 2 to 4. But a difference in the manner of fixing may produce this deviation from the theory, which only luppofed them to be held down at places beyond the props, as when a joifl is held in the walls, and all'o refts on two pillars between the walls. (See what is faid on this fubjedt in the article Roof, § tQ-) » where note, that there is a miftake, when it is faid that a beam fupported at both ends and loaded in the middle will carry twice as much as if one end were fixed in the wall and the weight fufpended at the other end. The reafoning employed there fhows that it will carry four times as much. The chief fource of irregularity in fuch experiments is the fibrous, or rather plated texture of timber. It confifts of annual additions, whofe cohefion with each other is vaftly weaker than that of their own fibres. Let fig. 21. repre- fent the leftion of a tree, and ABCD, abed the feftion of two battens that are to be cut out of it for experiment, and let AD and ad be the depths, and DC, dc the breadths. The batten ABCD will be the ftrongeft, for the fame reafon that an affemblage of planks fet edgewife will form a ftronger joift than planks laid above each other like the plates of a coach-fpring. Mr Buffon found by many trials that the ftrength of ABCD was to that of abed (in oak) nearly as 8 to 7. The authors of the different experiments were not careful that their battens had their plates all difpofed fimilarly with refpeft to the drain. But even with this precaution they would not have afforded fare grounds of computation for large works ; for great beams occupy much, if not the whole, of the feftiou of the tree ; and from this it has happened that their ftrength is lefs than in proportion to that of a fmall lath or batten. In fhort, we can truft no experiments but fuch as have been made en large beams. Thefe muft be very rare, for they are molt expenfive and laborious, and exceed the abilities of moft of thofe who are difpofed to ftudy this matter. . But we are not wholly without fuch authority. Mr Buf¬ fon and Mr Du Hamel, two of the firft philofophers and me¬ chanicians of the age, were directed by government to make experiments on this fubjedt, and were fupplied with ample funds and apparatus. The relation of their experiments is to be found in the Memoirs of the French Academy for 1740, 1741, 1742, 1768 ; as alfo in Du Hamel’s valuable performances fur VExploitation des Arbres, et fur la Confer- •vation et le Eranfport de Bois. We earneftly recommend thefe differtations to the perufal of our readers, as containing much ufeful information relative to the ftrength of timber, tg ] s T R and the beft methods of employing it. We fhall here give Strength of an abltradf of Mr Buffon’s experiments. Material?.^ He relates a great number which he had profecuted during j t x two years on fmall battens. He found that the odds of a Mr Buf- fmgle layer, or part of a layer, more or lefs, or even a dif-f00’* e*pe- ferent difpofition of them, had fuch influence that he was™™^9 011 obliged to abandon this method, and to have recourfe to thef0UI1(^ largeft beams that he was able to break. The following table exhibits one feries of experiments on bars of found oak, clear of knots, and four inches fquare. This is a fpecimen of all the reft. Column ift is the length of the bar in feet clear between the fupports. Column 2d is the weight; of the bar (the 2d day after it was felled) in pounds. Two bars were tried of each length. Each of the firft three pairs confifted of two cuts of the fame tree. The one next the root was always found the heavieft, ftiffeft, and ftrongeft. Indeed Mr Buffon fays that this was invariably true, that the heavieft was always the .ftrongeft ; and he recommends it as a certain (orfure) rule for the choice of timber. He finds that this is always the cafe when the timber has grown vigoroufly, forming very thick annual layers. But he alio obferves that this is only during the advances of the tree to maturity ; for the ftrength of the different circles approaches gradually to equality during the tree’s healthy growth, and then it de¬ cays in thefe parts in a contrary order. Our tool-makers affert the fame thing with refpedl to beech : yet a contrary opinion is very prevalent; and wood with a fine, that is, a fmall grain, is frequently preferred. Perhaps no perfon has ever made the trial with fuch minutenefs as Mr Buf¬ fon, and we think that much deference is due to his opinion. Column 3d is the number of pounds neceffary for breaking the tree in the courfe of a few minutes. Column 4th is the inches which it bent down before- breaking. Column 5th is the time at which it broke. The experiments on other fizes were made in the fame' way. A pair at leaft of each length and fize was takeni The mean refults are contained in the following table. The beams were all fquare, and their fizes in inches are placed at the head of the columns, and their lengths in feet are in th© firft column. s t n gtcenet'h of Material--, 5312 4550 4025 3b1 2 2987 11525 9787 8308 7125 6075 5320 4350 3700 3225 2975 2162 *775 1893c *5525 1315° 11250 9100 7475 6362 5562 4950 32200 26050 22350 *9475 16175 *3225 11000 9245 8375 8 47649 3975° 32800 27750 23450 *9775 16375 13200 11487 11525 10085 8964 8068 6723 5763 5042 4482 4° 3 4 3667 3362 288 r Mr Buffbn had found by numerous trials that oak-timber loft much of its ftrength in the courfe of drying or feafoning; and therefore, in order to fecure uniformity, his trees were all felled in the fjame feafon of the year, were fquared the day after, and tried the third day. Trying them in this green Hate gave him an opportunity of obferving a very curious and unaccountable phenomenon. When the weights were laid brilkly on, nearly fufficient to break the log, a very fenfible fmoke was obferved to ifiue from the two ends with a fharp hilling noife. This continued all the while the tree was bending and cracking. This fhows that the log is af- fefted or drained through its whole length; indeed this muft be inferred from its bending through its whole length. It alfo Ihows us the great effe&s of the compreflion. It is a pity Mr Buffon did not take notice whether this fmoke iffued from the upper or compreffed half of the fe&ion only, or whether it came from the whole. Obferva- We muft now make fome obfervations on thefe experi- tions on Mr meats, in order to compare them with the theory which we 30 ] s T R which we can conceive the length of a beam ta have, increafe the ftrain at the fedtfon of fra&ure by employing lN Ue'u^ the intervening beam as a lever. But we do not diftinftly fee what change this can produce in the mode of adlion of the fibres in this feftion, fo as either to change their cohefion or the place of its centre of effort: yet fome* thing of this kind muft happen. We fee indeed fome circumftances which mull contribute to make a fmaller weight fufficient, in Mr Buffon’s experi¬ ments, to break a long beam than in the exadl inverfe pro¬ portion of its length. In the firft place, the weight of the beam itfelf augments the ftrain as much as if half of it were added in form of a weight. Mr Buffon has given the weights of every beam - on which he made experiments, which is very nearly 74 Biiffon’ experi¬ ments. Jhave endeavoured to ellablilh, Mr Buffon confiders the experiments with the 5-inch bars as the ffandard of comparifon, having both extended thefe to greater lengths, and having tried more pieces of each length. Our theory determines the relative ftrength of bars of the fame fe&ion to be inverfely as their lengths. But (if we except the five experiments in the firft column) we find a very great deviation from this rule. Thus the 5-inch bar of 28 feet long Ihould have half the ftrength of that of 14 feet, or 2650; whereas it is but 1775. The bar of 14 feet Ihould have half the ftrength of that of 7 feet, or 5762 ; whereas it is but 5300. In like manner, the fourth of 11525 is 2881 ; but the real ftrength of the 28-feet bar is *775* We have added a column A, which exhibits the ftrength which each of the 5-inch bars ought to have by the theory. This deviation is moft diftin&ly feen in fig. 22. where BK is the fcale of lengths, B being at the point 7 of the fcale and K at 28. The ordinate CB is = 11525, and the other ordinates DE, GK, See. are refpe&ively = 7 CB The lines DF, GH, &c. are made =r 4350, .Length* pounds per cubic foot. But they are much too fmall to account for the deviation from the theory. 1 he half weights of the 5-inch beams of 7, 14, and 28 feet length are only 45, 92, and 182 pounds; which makes the real ftrains in the experiments 11560, 5390, and 1956} which are far from having the proportions of 4, 2, and 1. s Buffon fays that healthy trees are univerfally llrongeft at the root end ; therefore, when we ufe a longer beam, its middle point, where it is broken in the experiment, is in a weaker part of the tree. But the trials of the 4-inch beams fhow that the difference from this caufe is almoft infenfxble. The length muft have fome mechanical influence which the theory we have adopted has not yet explained. It may not however be inadequate to the tafk. The very ingeni¬ ous inveftigation of the elaltic curve by James Bernoulli and other celebrated mathematicians is perhaps as refined an ap¬ plication of mathematical analyfis as we know. Yet in this inveftigation it was neceffary, in order to avoid almoft infuper- able difficulties, to take the fimpleft poffible cafe, viz. where the thicknefs is exceedingly fmall in comparifon with the length. If the thicknefs be confiderable, the quantities ne- gledled in the calculus are too great to permit the conclu- fion to be accurate, or very nearly fo. Without being able to define the form into which aa elaftic body of confiderable thicknefs will be bent, we can fay with confidence, that in an extreme cafe, where the compreffien in the concave fide is very great, the curvature differs coniiderably from the Bernoullian curve. But as our inveftigation is incomplete and very long, we do not offer it to the reader. The fol- pro”^[{ lowing more familiar confiderations will, we apprehend, ren-^^. the der it highly probable that the relative ftrength of beams relative decreafes fafter than in the inverfe ratio of their length. The curious obfervatiou by Mr Buffon of the vapour which iffued ^)eanis^v I775> expreffing the ftrengths given by experiment. The ic-leet bar and the 24-feet bar are remarkably anoma¬ lous. But all are deficient, and the defedl has an evident progreffion from the firft to the laft. The fame thing may be fhown of the other columns, and even of the firft, though it is very fmall in that column. It may alfo be obferved in the experiments of Belidor, and in all that we have feen. We cannot doubt therefore of its being a law of nature, de¬ pending on the true principles of cohefion and the laws of mechanics. But it is very puzzling, and we cannot pretend to give a fatisfadory explanation of the difficulty. The only effed • • • ■ — creafes with a hiffing noife from the ends of a beam of green oak,er thaI, while it was breaking by the load on its middle, fhows that the inverfi the whole length of the piece was affeded : indeed it muft ratio of be, fince it is bent throughout. We have (hown above,^eir, that a certain definite curvature of a beam of a given form' “ is always accompanied by rupture. Now fuppofe the beam A ot 10 feet long, and the beam B of 20 feet long, bent to the fame degree, at the plac« of their fixure in the wall } the weight which hangs on A is nearly double of that which muft hang on B. The form of any portion, fuppofe 5 feet, of thefe two beams, immediately adjoining to the wall, is confiderably different. At the diftance of 5 feet the cur¬ vature of A is,4- of its curvature at the wall. The curva¬ ture of B in the correfponding point is Jths of the fame cur¬ vature at the wall. Through the whole of the intermediate 5 feet, therefore, the curvature of B is greater than that of A. This muft; make it weaker throughout. It muff occa- fion the fibres to Aide more on each other (that it may ac¬ quire this greater curvature), and thus affed their lateral union ; S T R . £ 3 Strergth eftinioR ; and therefore thofe which are Wronger will not aflift Materials, ^^eir weaker neighbours. To this we muft add, that in the u—-'T”"-' fhorter beams the force with which the fibres are prefled la¬ terally on each other is double. This muft impede the mu¬ tual Aiding of the fibres which we mentioned a little ago; nay, this lateral comprefiion may change the law of longitudinal cohefion (as will readily appear to the reader who is ac¬ quainted with Bofcovich’s do&rines), and increafe the ftrength of the very furface of fra&ure, in the fame way (however inexplicable) as it does in metals when they are hammered or drawn into wire. The reader muft judge how farthefe remarks are worthy of his attention. The engineer will carefully keep in mind the important fad, that a beam of quadruple length, inftead of having ^th of the ftrength, has only about ^-th ; and the philofopher ftiould endeavour to difcover the caufe of this diminution, that he may give the artift a more accurate rule of computation. We Vat not Our ignorance law ^7 which the cohefion of the iifcover the particles changes by a change of diftancc, hinders us from preafe re- difcovering the precife relation between the curvature and lation be- jjjg momentum of cohefion; and all we can do is to multiply •uiVature experiments, upon which we may eftablifti feme empirical ind the rules for calculating the ftrength of folids. Thofe from tnotrentum which we muft reafon at prefent are too few and too ano- jf cohefion. malous to be the foundation of fuch an empirical formula. We may, however, obferve, that Mr Buffon’s experiments give us confiderable afiiftance in this particular: For if to each of the numbers of the column for the 5-inch beams, correfted by adding half the weight of the beam, we add the conftant number 1245, we (hall have a fet of numbers which are very nearly reciprocals of the lengths. Let 1245 be called r, and let the weight which is known by experi¬ ment to be neceflary for breaking the 5-inch beam of the length a be called P. We fiiall have a — c zz p. Thus the weight necefiary for breaking the 7-foot bar is 11560. This added to 1245, and the fum multiplied by 89635 Let / be 18 ; then — 7, gives P 4- c X a = 89635. hi U ti ti< "? 115 ifei to uj delation between — *245 =r 3725, p, which differs not more than from what experiment gives us. This rule holds equally well in all the other lengths except the 10 and 24 foot beams, which are very anomalous. Such a formula is abun¬ dantly exadt for pradlice, and will anfwer through a much greater variety of length, though it cannot be admitted as a true one; becaufe, in a certain very great length, the ftrength will be nothing. For other fizes the conftant number muft change in the proportion of d or perhaps of p. The next comparifon which we have to make with the theory is the relation between the ftrength and the fquare ■ ar.d ^ie depth of the fedtion. This is made by comparing Pquare of each other the numbers in any horizontal line of the the depth table. In making this comparifon we find the numbers of the fee. the five-inch bars uniformly greater than the reft. We imagine that there is fomething peculiar to thefe bars : They are in general heavier than in the proportion of their fedtion, but not fo much fo as to account for all their fuperi- ority. We imagine that this fet of experiments, intended as a ftandard for the reft, has been made at one time, and that the feafon has had a confiderable influence. The fadt however is, that if this column be kept out, or uniformly dimmiihed about TVth Jn their ftrength, the different fizes will deviate very little from the ratio of the fquare of the depth, as determined by theory. There is however a fmall deficiency in the bigger beams.- i ] S T R We have been thus anxious in the examination of thefe Strength oF experiments, becaufe they are the only ones which have . i \ been related in fufficient detail, and made on a proper kale for giving us data from which we can deduce confidential maxims for pradtice. They are fo troublefome and expen- five that we have little hopes of feeing their number greatly increafed; yet furely our navy board would do an unfpeak- able fervice to the public by appropriating a fund for fuch experiments under the management of fome man oi fcience. II(y There remains another comparifon which is of chiei im- proportiont portance, namely, the proportion between the absolute between cohesion and the relative strength. It may be gue^e,i»^£Qp°|utc from the very nature of the thing, that this muft be very an/the re¬ uncertain. Experiments on the ablolute ftrength muft. bejative confined to very fmall pieces, by reafon of the very great ftrength.- forces which are required for tearing them afunder. The values therefore deduced from them muft be fubjedt to great inequalities. Unfortunately we have got no detail of any experiments; all that we have to depend on is two paffages of Mufchenbroek’s EJfa'tt de Phyjique} in one of which he fays that a piece of found ©ak x^ths of an inch fquare is torn afunder by 1150 pounds; and in the other, that an oak plank 12 inches broad and 1 thick will juft fufpend 189163 pounds. Thefe give for the cohefion of an inch fquare 15,755 and l5>7^3 pounds. Bouguer, in his Traits du Navire, fays that it is very well known that a rod of found oak ^th of an inch fquare will be torn afunder by 1000 pounds. This gives 16000 for the cohefion of a fquare * inch. We fliall take this as a round number, eafily ufed in our computations. Let us compare this with Mr Buffon’s trials of beams four inches fquare. The abfolute cohefion of this fedfion is 16,000 X 16 = 256,000. Did every fibre exert its whole force in the in- ftant of fradture, the momentum of cohefion would be the fame as if it had all adted at the centre of gravity of the fedtion at 2 inches from the axis of fradture, and is there¬ fore 512000. The 4-inch beam, 7 feet long, was broken by 5312 pounds hung on its middle. The hah of this, or 2656 pounds, would have broken it, if fufpended at its ex¬ tremity, projedting 3x feet or 42 inches from a wall. The momentum of this ftrain is therefore 2656 X42, = i 11552. Now this is in equilibrio with the adlual momentum of cohe¬ fion, which is therefore 111552, inftead of 512000. The ftrength is therefore diminifhad in the proportion of 512000 to 111552, or very nearly of 4,59 to 1. As we are quite uncertain as to the place of the centre of effort, it is needlefs to confider the full cohefion as afting at the centre of gravity, and producing the momentum 512,000 ; and we may convert the whole into a Ample mul- tiplyer m of the length, and fay, as m times the length is ta the depth, fo is the abfolute cohefon of the ftBion to the re¬ lative Jlrength. Therefore let the abfolute cohefion of a fquare inch be called f, the breadth Z, the depth d, and the length l (all in inches), the relative ftrength, or the exter* f b dz nal force which balances it, is —, or in round num- fbd- 9>1*1 bers for m = 2 X 4,59- This great diminution of ftrength cannot be wholly ac¬ counted for by the inequality of the cohefive forces exerted in the inftant of fradfure ; for in this cafe we know that the centre of effort is at -fd of the height in a redlangular fec- tion (becaufe the forces really exerted are as the extenfionS' of the fibres). The relative ftrenath would be and . . 3' p would have been 8127 inftead of 2656. We muft aferibe this diminution (which is three times greater than that produced by the inequality of the cohe- fiver S T R t 3* 3 S T R StrensA offive forces) to the compreffion of the under part of the Materials. ^eam . an(i we muft endeavour to explain in what manner this compreflion produces an effeft which feems fo little ex¬ plicable by fuch means. As we have repeatedly obferved, it is a matter of nearly 'imiverfal experience tlyit the forces adually exerted by the particles of bodies, when ftretched or compreffed, are very nearly in the proportion of the diftances to which the par¬ ticles are drawn from their natural poiitions. Now, altho’ we are certain that, in enormous compreffions, the forces in- creafe falter than in this proportion, this makes no feniible change in the prefent cjueftion, becaufe the body is broken 'before the compreffions have gone fo far ; nay, we imagine that the comprelfed parts are crippled in moll cafes even before the extended parts are torn afunder. Mufchenbroek aflerts this with great confidence with refpeft to oak, on the authority of his own experiments. He fays, that al¬ though oak will fufpend half as much again as fir, it will not fupport, as a pillar, two-thirds of the load which fir will fupport in that form. We imagine therefore that the mechanifm in the prefent cafe is nearly as follows : Let the beam DCK a (fig. 23.) be loaded at its extre¬ mity with the weight P, adting in the direction KP perpen¬ dicular to DC. Let D A be the fe&ion of frafture. Let DA be about yd of D a. A will be the particle or •fibre which is neither extended nor compreffed. Make & & :T) d— DA : A a. The triangles DA d, A A will reprefent the accumulated attrafting and repelling forces. Make AI and A f = y DA and y A A. The point I will be that to which the full cohefion D d or f ok the particles in AD muft be applied, fo as to produce the fame momen¬ tum which the variable forces at I, D, &c. really produce at their feveral points of application. In like manner, i is the centre of fimilar effort of the repulfive forces excited by the compreffion between A and a, and it is the real fulcrum of a bended lever li K, by which the whole effeCf is produ¬ ced. The effect is the fame as if the full cohefion of the ftretched fibres in AD were accumulated in I, and the full repulfion of all the compreffed fibres in A a were accumu¬ lated in i. The forces which are balanced in the operation are the weight P, afting by the arm k i, and the full cohe¬ fion of AD afting by the arm I i. The forces exerted by the compreffed fibres between A and A only ferve to give fupport to the lever, that it may exert its ftrain. We imagine that this does not differ much from the real procedure of nature. The pofition of the point A may be different from what we have deduced from Mr Buffon’s ex¬ periments, compared with Mufchenbroek’s value of the ab- folute cohefion of a fquare inch. If this laft fhould be only 12000, DA muft be greater than we have here made it, in the proportion of 12000 to 16000. For I r muft ftill fee made = y A a, fuppofing the forces to be propor¬ tional to the extenfions and compreffions. There can be no doubt that a part only of the cohefion of D A operates an refilling the irafture in all fubllances which have any compreffibility; and it is confirmed by the experiments of Mr Du Hamel on willow, and the inferences are by no means confined to that fpecies of timber. We fay therefore, that when the beam is broken, the cohefion of AD alone is exerted, and that each fibre exerts a force proportional to its extenlion ; and the accumulated momentum is the fame as if the full cohefion of AD were afting by the lever I i r=:yd of D A. It may be faid, that if only 4d of the cohefion of oak be . exerted, it may be cut ^ds through without weakening it. But this cannot be, becaufe the cohefion of the whole is em¬ ployed in preventing the lateral Hide fo often mentioned. We have no experiments to determine .that it may »e>/beS’rengt},,, cut through yd without iofs of its ftrength. r^aterial«, This muft not be confidered as a fubjeft of mere fpecula- L j"" tive curiofity : It is intimately connefted with all the prac¬ tical ufes which we can make of this knowledge ; for it is almoft the only way that we can learn the comprefiibility of timber. Experiments on the direft cohefion are indeed difficult, and exceedingly expenfive if we attempt them in large pieces. But experiments on compreffion are almoft imprafticable. The moft inftruftive experiments would be, firll to eftabhfh, by a great number of trials, the tranfverfe force of a modern batten ; and then to make a great num¬ ber of trials of the diminution of its ftrength, by cutting it through on the concave fide. This would very nearly give us the proportion of the cohefion which really operates in refifting fraftures. Thus if it be found that one-half of the beam may be cut on the under fide without diminution of its ftrength (taking care to drive in a flice of harder wood), we may conclude that the point A is at the middle, or fomewbat above it. Much lies before the curious mechanician, and we are as yet very far from a fcientific knowledge of the ftrength of timber. , In the mean time, we may derive from thefe experiments A ^, of Buffon a very ufeful praftical rule, without relying onpra&jca; any value of the abfolute cohefion of oak. We fee that the rule majt ftrength is nearly as the breadth, as the fquare of the depth, deduced nr and as the inverfe of the length. It is moft convenient to from J Buffim’i meafure the breadth and depth of the beam in inches, andexpen. its length in feet. Since, then, a beam four inches fquare ments. and feven fee't between the fupports is broken by 5312 pounds, we muft conclude that a batten one inch fquare and one foot between the fupports will be broken by 581 pounds. Then the ftrength of any other beam of oak, or the weight which will juft break it when hung on its middle, 3d* is 581 / But we have feen that there is a veiy confiderable devia¬ tion from the inverfe proportion of the lengths, and we muft endeavour to accommodate our rule to this deviation. We found, that by adding 1245 to each of the ordinates or numbers in the column of the five-inch bars, we had a fet of numbers very nearly reciprocal of the lengths ; and if we make a fimilar addition to the other columns in the propor¬ tion of the cubes of the fixes, we have nearly the fame refult. The greateft error (except in the cafe of experiments which are yery irregular) does not exceed iVth of the whole. Therefore, for a radical number, add to the 5312 the num¬ ber 640, which is to 1245 very nearly as 4’ to y5. This gives 5952. The 64th of this is 93, which correfponds to a bar of one inch fquare and feven feet long. Therefore 93 X 7 will be the reciprocal correfponding to a bar of one foot. This is 651. Take from this the prefent empirical 6 40 correftion, which is -7— , or 10, and there remains 641 for 0 4 1 the ftrength of the bar. This gives us for a general rule b d* /> =r 65 1 --7— — \ ob d* l Example, Required the weight neceffary to break an oak beam eight inches fquare and 20 feet between the 8 X 81 props, /> = 651 X —— — l o X 8 X 8 \ This is 11545, whereas the experiment gives 11487. The error is very {mall indeed. The rule is moll deficient in companion with the five-inch bars, which we have already faid appear ftrong- er thaa the reft. The R r S T oF The following procefs is eafily remembered by fuch as Mater.ale. are not algebraifts. —v ^ Multiply the breadt-h in inches twice by the^ depth, and call this productMultiply j by 65 an(^ divide by the length in feet. From the quotient^ take 10 times/. The remainder is the number of pounds which will break the beam. We are not fufficiently fenfible of our principles to be confident that the correction ro/fhould be in the propor¬ tion of the feftion, although we think it molt probable. It is quite empirical, founded on Bufton’s experiments. There- fore the fafe way of ufing this rule is to fuppofe the beam fquare, by increaiing or diminidling its breadth till equal to the depth. Then find the ftrength by this rule, and dimi- liifh or increase it for the change which has been made in its breadth. Thus, there can be no doubt that the ftrength of the beam given as an example is double of that of a beam of the name depth and half the breadth. The reader cannot but obferve that all this calcula¬ tion relates to the very greateft weight which a beam will bear for a very few minutes. Mr Buffon uniformly found that two-thirds of this weight fenfibly impaired its ftrength, and frequently broke it at the end of two or three months. One-half of this weight brought the beam to a certain bend, . • which did not increafe after the firfl minute or two, and may be borne by the beam for any length of time. But the beam contracted a bend, of which it did not recover any conlider- able portion. One-third feemed to have no permanent ef- fedt on tire beam ; but it recovered its reCtilineal fhape com¬ pletely, even after having been loaded feveral months, pro¬ vided that the timber was feafoned when firft loaded ; that is to fay, one-third of the weight which would quickly break a feafoned beam, or one-fourth of what would break one juft felled, may lie on it for ever without giving the beam a fett. We have no detail of experiments on the ftrength of other kinds of timber: only Mr BufFon fays, that fir has about T^ths or the ftrength of oak; Mr Parent makes it -V^ths ; Emerfon, ^ds, &c. We have been thus minute in our examination of the me- chanifm of this tranfverfe ftrain, becaufe it is the greattft to which the parts of our machines are expoled. We wifh to imprefs on the minds of artifts the neceffity of avoiding this as much as poftible. They are improving in this refpeCt, as may be feen by comparing the centres on which ftone arches of great fpan are now turned with thofe of former times. 1 he} were formerly a load of mere joifls refting on a multitude of polls, which obftrufted the navigation, and were frequent¬ ly lofing their fhape by fome of the polls finking into the ground. Now they are more generally truffes, where the beams abutt on each other, and are relieved from tranfverfe Trains. . But many performances of eminent artifts are ftill very mjudicioufly expofed to crofs ftrains. We may in- itance one which is confidered as a fine work, viz. the bridge at Walton on Thames. Here every beam of the great arch is a joifl, and it hangs together by framing. The ", Pl.ece ot carpentry that we have feen is the centre em- ployed m turning the arches of the bridge at Orleans, de- M-xibed by Perronet. In the whole there is not,one crofs irain. i he beam, too, of Hornblower’s fleam-engine, de- th,atnarticl.e> 18 very fcientifically conltrurScd. IV. I he laiUpecies of ftrain which we are to examine is that produced by twiftmg. This takes place in all axles vduch conned the working parts of machines. cent nl1<>U/hu WC P.ret€nd t0 have a very difiind con- wHch it eft m‘).dt5lca'10nr°1f thecohefion of a body by that when^ 11 l '1S ^iri,d ffram, we can have no doubt Von. XVlilTtf8 a^^e’ t^ie rcftfiance mull be nS Strain pt0 duced hy Swilling. 33 1 . S T It proportional to the number. Therefore if wc fuppofe the ^rensjtfc of two parts ABCD, ABFE (fig. 24.), of the body EFCD Ma^f;a,s* to be of infuperable {length, but cohering more weakly in the common furface AB, and that one part ABCD is pufh-The refill¬ ed laterally in the direftion AB, there can be no doubt that a ce muft it will yield only there, .and that the refiftance will be pro-be Pr'’Por- ponional to the furface. , . . . In like manner, we can conceive a thin cylindrical tube,of jiartick*. of which KAH (fig. 25.) is the fedlion, as cohering more weakly in that fedion than anywhere elfe. Suopofe it to be grafped in both hands, and the two parts twilled round the axis in oppofite diredions, as we would twift the two joints of a flute, it is plain that it will firft fail in this fedion, which is the circumference of a circle, and the particles of the two parts which are contiguous to this circumference will be drawn from each other laterally. The total refin¬ ance will be as the number of equally refifting particles, that is, as the circumference (for the tube being fuppofed very thin, there can be no fenfible difference between the dilatation of the external and internal particles). We can now fuppofe another tube within this, and a third within the fecond, and fo on till we reach the centre. If the par¬ ticles of each ring exerted the lame force (by fuffering the fame dilatation in the diredion qt the circumference), the 1 efifiance of each ring of the fedion would be as its circum¬ ference and its breadth (fuppofed indefinitely fmall), and the whole refiftance would be as the furface ; and this would reprefent the refiftance of a folid cylinder. But when a cy¬ linder is twilled in this manner hy an external force appli¬ ed to its circumference, the external parts will fuffer a greater circular extenfion than the internal ; and it appears that this extenfion (like the extenfion of a beam {trained tranfverfely) will be proportional to the diflance of the par¬ ticles from the axis. We cannot fay that this is demon- ftrable, but we can afiign no proportion that is more pro¬ bable. I his being the cafe, the forces fimultaneoufly ex¬ erted by each particle will be as its diftance from the axis. Therefore the. whole force exerted by each ring will be as the fquare of its radius, and the accumulated force adually exerted will be as the cube of the radius; that is, the accu- mulated force exerted by the whole cylinder, whofe radius is CA, is to the accumulated force exerted at the fame time by the part whofe radius is CE, as CA3 to CE3. The whole cohefion now exerted is juft two-thirds of what it would be if all the particles were exerting the fame attractive forces which are juft now exerted by the particles in the external circumference. This is plain to any perfon in the leaft familiar with the fluxionary calculus. But fuch as are not may eafily fee it in this way. Let the redangle AC c a be fet upright on the furface of the circle along the line CA, and revolve round the axis C r. It will generate a cylinder whofe height is C c or A a, and having the circle KAH for its baft’ If the diagonal C a be fuppofed alfo to revolve, it is plain that the triangle c C a will generate a cone of the fame height, and having for its bale the circle deferibed by the revolution of c a, and the point C for its apex. The cylindrical furface generated by A a will dxprefs the whole cohefion exerted by the circumference A.HK, and the cylindrical furface ge¬ nerated by E ^ will reprefent the cohefion exerted by the circumference ELM, and the folid generated by the triangle C A a will reprefent the cohefion1 exerted by the whole circle AHK, and the cylinder generated by the reftangle AC r a will reprefent the cohefion exerted by the fame fur¬ face if each particle had fuffered the extenfion A a. Now it is .plain, in the firft place, that the folid genera¬ ted by the triangle e EC is to that generated by a AC as EC 3 to AC 3. In the next place, the folid generated by E a AC S T R [ Strength of^ AC ;s tw0.thi’rice Plate C C C C L XXXV. _ St'-etto. on timber irregular. S T R [35 Strength of to each arm, a&ing In oppofite direfiions. Thus the centre Materials i3ecame the neutral point, and the refiftance to twill was found to be ^da 0f the fimple lateral ftrength. We beg leave to mention here that our fuccefs in thefe experiments encouraged us to extend them much farther. We hoped by tbefe means to difcover the ablolute coheiion of rhalb day tTiany lubftances,’which would have required an enormous ap- and wax, paratus and a moll unmanageable force to tear them afunder ratisfiAoryjdiredlly. But we could reafon with confidence from the hut tliofe refinance to twifi (which we could eafily meafure), provided that we could afcertain the proportion of the direft and the lateral ilrengths. Our experiments on chalk, finely pre¬ pared clay, and white bees-wax (of one melting and one temperature), were very confiftent and fatisfaffory. But we have hitherto found great irregularities in this propor¬ tion in bodies of a fibrous texture like timber. Thefe are the mofl important cafes, and we ftill hope to be able to accomplifh our project, and to give the public fome valuable information. T his being our foie objeft, it was our duty to mention the method which promifes fuccefs, and thus excite others to the talk ; and it will be no morti¬ fication to us to be deprived of the honour of being the firft who thus adds to the flock of experimental knowledge. When the matter of the axle is of the moll fimple tex¬ ture, Inch as that of metals, we do not conceive that the length of the axle has any influence on the fradlure. It is otherwife if it be of a fibrous texture like timber : the fibres are bent before breaking, being twilled into Ipirals like a cork-fcrew. The length of the axle has fomewhat of the influence of a lever in this cafe, and it is eafier wrenched afunder if long. Accordingly wc have found it fo; but we 119 liave n°t been able to reduce this influence to calculation. Concluding ^ur reader* are requefted to accept of thefe endeavours rema ks. to communicate information on this important and difficult fubjedl. We are duly fenfible of their imperfection, but flat¬ ter ourfelves that we have in many inftances pointed out the method which mult be purfued for improving our knowledge on this fubjedt ; and we have given the Eng- lilh reader a more copious lift of experiments on the ftrength of mateiials than he will meet with in our lan¬ guage. Many ufeful deductions might be made from thei'e premifes reipedfing the manner of difpofing and combi¬ ning the ftrength of materials in our ftrudtures. The belt form of joints, mortifes, tenons, fcarphs ; the rules for jog- gling, tabling, faying, fiftiing, See. pradtifed in the delicate art ol mall-making, are all founded on this dodtrine : but the difeuffion of thefe would be equivalent to writing a complete treatife of carpentry. We hope that this will be executed by lome intelligent mechanician, lor there is nothing in our language on this fubjedl but what is almoll contemptible ; yet there is no mechanic art that is more fufceptible or fcientific treatment. Such a treatife, it well executed, could not fail of being well received by the pub- bc in this age of mechanical improvement. . S'! RENG 1 HENERS, or Corroborants, fuch me¬ dicines as add to the bulk and firmnefs of the folids ; and fucli are all agglutinant and aftringent medicines. See Ma¬ teria Mfdica, p.649. art. 6. S I RE I CHING, in navigation, is generally underftood to imply the progreffion of a Ihip under a great furf ace of fail, when clofe-hauled. The difference between this term and Jtandmg, conhfts apparently in the quantity of fail; which i 1 S T R STRIATED leaf, among botanifts, one that has a number of longitudinal furrows on its furface. STRIKE, a meafure of capacity, containing four bulhels. , Alfo an inftrument ufed in meafuring corn. STRIX, the owl, in ornithology, a genus belonging to the order of accipitres. The bill is hooked, but has no cere or wax ; the noftrils are covered with fetaceous fea¬ thers ; the head is very large, as are alfo the ears and eyes ; and the tonyue is bifid. There are 46 fpecies; the moft remarkable are, 1. The bubo, or great-eared owl, in fize is almoft equal to an eagle. Irides bright yellow; head and whole body finely varied with lines, fpots, and fpecks of black, brown, cine¬ reous, and ferruginous. Wings long; tail (hurt, marked with dufky bars. Eegs thick, covered to the very end of the toes witli a clofe and full down of a teftaceous colour. Claws great, much hooked, and duiky. — It has been fhot in Scotland and in Yorkfhire. It inhabits inacceffible rocks and defert places; and preys on hares and feathered game. Its appearance in cities was deemed an unlucky omen ; Rome itfelf once underwent a luftration becaufe one of them ftray- ed into the capitol. The ancients had them in the utmoft abhorrence ; and thought them, like the fcreeoh-owls, the meffengers of death. Pliny ftyles it bubofunebrh, and no£!is monjlrum. Solaque culminlbus ferali carmine bubo Stcpe queri et longas in jhtum ducere voces. Virgil. Perch'd on the roof, the bird of night complains, In lengthen’d fhrieks and dire funereal drains. Striated Strix. ?. The otus, or long-eared owl, is found, though not frequently, in the north of England, in Chefnire, and in Wales. Mr Haffelquift faw it alive in Cairo, and it is not unfrequent all over Egypt. Its weight, according to Dr Latham, is nine ounces; the length 14 inches and a half; the breadth 34 ; the irides are of a bright yellow ; the bill black ; the breaft and belly are of a dull yellow, marked with {lender brown ftrokes pointing downwards; the thighs and vent-feathers of the fame colour, but un- fpotted. The back and coverts of the wings are varied with deep brown and yellow; the quill-feathers of the {ame colour, but near the ends of the outmoft is a broad bar of red ; the tail is marked with duiky and reddifti bars, but beneath appears afh-coloured ; the horns or ears are about an inch long, and confift of fix feathers variegated with yellow and black ; the feet are feathered down to the claws. the latter may be very moderate ; ‘but ilretching generally jgnihes excels : as, we law the enemy at day break ftretch- Jke fouthward under a croud of fail, &c. Falconer. S I RET 1 O, in Italian mufic, is fometimes ufed to ligni- 7 thft the. ^eafure is te be Ihort and concife, and confe- quently quick. In this fenfe it Hands oppofed to Largo. 3-lThe Irachyotos,orfhort-eared owl, is 14 inches long; three feet broad; the head is fmall and hawk-like ; the bill is duiky; weight 14 ounces; the circle of feathers that immediately fur- rounds the eyes is black ; the larger circle white, terminated with tawny and.black ; the feathers on the head, back, and coverts of the wings, are brown, edged with pale dull yel¬ low ; the breaft and belly are of the fame colour, marked with a few long narrow ftreaks of brown pointing down¬ wards ; the quill-feathers are duiky, barred with red ; the tail is of a very deep brown, adorned on each fide of the fhaft of the four middle feathers with a yellow circle which con¬ tains a brown fpot; the tip of the tail is white. The horns of this fpecies are very fmall, and each conlifts of on¬ ly a Angle feather ; thefe it can raife or deprefs at pleafure ; and in a dead bird are with difficulty difeovered. This kind is fcarcer than the former; both are folitary birds, avoiding inhabited places. Thefe fpecies may be called long-nuinged owls ; the wings when clofed reaching beyond the end of the tail; whereas in the common kinds they fall fhort of it.—This is a bird of paffage, and has been obfer- ved to viftt Lincolnlhire in the beginning of Odtober, and E 2 to S T R [ 36 ] S T R Strir, to retire early in tbe fpring ; To probably, as it performs its ' migrations with the woodcock, its fummer-retreat is Nor¬ way. During day it lies hid in long old grafs; when di- iturbed, it feldom flies far, but will bght, and lit looking at one, at which time the horns may be feen very diftindlly. It has not been obferved to perch on trees like other owls ; it ufually flies in fearch of prey in cloudy hazy weather. Farmers are fond of feeing thefe birds in the fields, as they clear them from mice. It is found frequently on the hill ot Hoy in the Orkneys, where it flies about and preys by day like a hawk. It is found alfo, as we mentioned before, in Lancalhire, which is a hilly and woody country ; and in New England and Newfoundland. 4. The Jlammea, or common white owl. The elegant plumage ot this bird makes amends for the uncouthnefs of its form: a circle of foft white feathers furround the eyes. The upper part of the body, the coverts, and fecon- dary feathers of the wings, are of a fine pale yellow : on each fide of the lhafts are two grey and two white fpots placed alternate: the exterior fides of the quill-feathers are yellow ; the interior white, marked on each fide with four black fpots : the lower fide of the body is wholly white ; the interior fides of the feathers of the tail aVe white ; the exterior marked with fome obfcuie dulky bars ; the legs are feathered to the feet : the feet are covered with fhort hairs : the edge of the middle claw is ferrated. The ufual weight is 11 ounces ; its length 14 inches; its breadth 3 feet.— This fpecies is almoft domeftic ; inhabiting, for the greatefl part of the year, barns, hay-lofts, and other out houfes ; and is as ufeful in clearing thofe places from mice as the conge¬ nial cat: towards twilight it quits it:? perch, and takes a re¬ gular circuit round the fields, fkimming along the ground in queft of field-mice, and then returns to its ufual refidence : in the breeding-feafon it takes to the eaves of churches, holes in lofty buildings, or hollows of trees. During the time the young are in the neft, the male and female alter¬ nately lally out in queft of food, make their circuit, beat the fields with the regularity of a fpaniel, and drop inftant- ly on their prey in the grafs. They very fddom ftay out above five minutes ; return with their prey in their claws; but as it is neceflary to fhift it into their bill, they always alight for that purpofe on the roof, before they attempt to enter their neft. This fpecies does not hoot ; but fnores and hifl’es in a violent manner ; and while it flies along will often fcream moft tremendoufly. Its only food is mice. As, the young of thefe birds keep their neft for a great length oi time, and are fed even long after they can fly, ma¬ ny hundreds of mice will fcarcely fuffice to iupply them with food. Owls call up the bones, fur, or feathers of their prey, in form of fmall pellets, after they have de¬ voured it, in the fame manner as hawks do. A gentle¬ man, on grubbing up an old pollard afh that had been the habitation of owls for many generations, found at the bot¬ tom many bufhels of this reje&ed fluff. Some owls, when they are fatisfied, hide the remainder of their meat like dogs. 5. The Jlrtdula, or tawny owl. The female of this fpecies weighs 19 ounces; the length is 15 inches ; the breadth 2 feet 8 inches; the irides are dufky ; the ears in this, as in all owls, very large ; and their ienfe of hearing very ex- quifite. The colour of this kind is fufficient to diftinguifh it from every other: that of the back, head, coverts of the wings, and on the Icapular feathers, being a fine tawny red, elegantly fpotted and powdered with the black or dulky fpots of various fizes : on the coverts of the wings and on the Icapulars are leveral large white fpots : the coverts of Strit. is varioufly blotched, barred and fpotted with pale red and black ; in the two middle feathers the red predominates: vT-,‘* the breall and belly are yellowilh, mixed with white, and marked with narrow black ftrokes pointing downwards: the legs are covered with feathers down to the toes.—This is a hardier fpecies than the former ; and the young will feed on any dead thing, whereas thofe of the white owl muft have a conftant fupply of frelh meat. It is the ftrix of Aldrovandus, and what we call the fcreech-orw't; to which the folly of fuperftition had given the power of pre- faging death by its cries. The ancients believed that it fucked the blood of young children : a farrbilt'S, stroking. :e Brief ccount of (r a!efl¬ it; Great ii'Sy Lon u, t606, of a rufous white : the head and neck are white, and not fo full of feathers as thofe of owls generally are, and from this circumflance it appears not unlike a hawk: a large patch of dark brown furrounds each eye, giving the bird much the appearance of wearing fpe&acles; the legs are covered with feathers quite to the toes, and are of a yellowifh colour. A fpecimen of this curious biid may be feen in the Leverian mufeum. STROBILUS, in botany, a pericarp formed from an amentum by the hardening of the fcalesr STROKING, or rubbing {jently with the hand, a me¬ thod which has been employed by fome perfons for curing difeafes. Mr Greatrakes or Greatrix, the famous Infh ftroker, is faid to have uerformed many wonderful cures. He gives the following account of his difcovery of this art, and of the fuccefs with which he praCtifed it “ About 1662 I had an impulfe ((ays he), or a ilrange perfuafion in my own mmd (of which I am not able to give any rational account to another), which did very frequently fuggefl to me, that there was bellowed on me the gilt of curing the king’s evil; which, for the extraordinarinefs of it, I thought fit to con¬ ceal for iorae time ; but at length I communicated this to my wife, and told her, that I did verily believe that God had given me the bltffing of curing the king’s evil; for whether I were in private or public, lleeping or waking, ftill I had the fame impulfe. But her reply to me was, that fire conceived this was a ftraage imagination ; yet, to prove the contrary^ a few days after there was one William Ma¬ ther of c alterbridge in the parilh of Lxfmore, who brought his fon William to my houie, defiring my wife to cure him, who was a perfon ready to afford her charity to her neigh¬ bours, according to her fmall fkill in chirurgery. On which my wife told me, there w'as one that had the king’s evil very grievoully in the eyes, check, and throat; whereupon I told her, that fhe fhould now fee whether this were a bare fancy or imagination, as fire thought it, or the di&ates of God’s Spirit on my heart. Then 1 laid my hands on the places afkaed, and prayed to God for Jefus fake to heal him; and bid the parent two or three days afterwards to bring the child to me again, which accordingly he did; and I then faw the eye was almoft quite whole; and the node, which was almoft as big as a pullet’s egg, was fuppurated ; and the throat ftrangely amended ; and, to be brief (to God’s glory I {'peak it) within a month dilcharged itfelf quite, and was perfectly healed, and fo continues, God be praifed.” Then there came to him one Margaret Macftiane of Bal- linecly, in the patifh of Lifmore, wTo had been affii&ed with the evil above feven years, in a much more violent de- gree ; and loon after, his lame inereafing, he cured the lame difeafe in many other perfons tor three years. He did not meddle all this time with any other diftemper; till about the end of theft three years, the ague growing epidemical, tie tound, as formerly, that there was bellowed on him the gift of curing that difeafe. He cured Colonel Phaire, of Gahirmony m the county of'Corke, of an ague, and after- wards many other perfons of different dillempers, by itro- jmg ; fo that his name was wonderfully cried up, as if fome civine perfon had been lent from above. January j66c 6, he came over to England, at the requeft .of the earl of Gr- rery ; in order to cure the lady of the lord-vifcount Con¬ s’ 0yvag;ey ln Warwickfhire, who had for many years aboured under a moft violent headache.. He Raid at Lg- endeavT °J 3 m?nth,; and thou^ ^ failed in his neoule in^w rC ieV£ that ady’ hc cured valt numbers of p opie in thofe parts and at Worcefter. 1 10Ugh we are 110 friends to the.marvellous, nor believe it poflible that either the king’s evil or ague can be cured by ftroking or fridtion of any kind, whether gentle or fevete, we have no hefitation to acknowledge that many cures might be performed by Mr Greatiakes. Every reflefting per¬ fon who reads the foregoing account which he gives ofhim- felf will fee that he was an enthufiaft, and believed himfelf guided by a particular revelation ; and fuch is the credulity of mankind, that his pretenfions were readily admitted, and men croudcd with eagernefs to be relieved of their difeafes. But it is well known to phyficians, that in many cafes the imagination has accomplifhed cures as wonderful as the force of medicine. It is owing chiefly to the influence of ima¬ gination that we have fo many accounts frotn people of ve¬ racity of the wonderful effefts of quack medicines. We are perfedfly affured that thefe medicines, by their natural ope¬ ration, can never produce the effedls afcribed to them ; for there is no kind of proportion between the medicine and the effedl produced, and often no connexion between the medi¬ cine and the difeafe. S PROM A i'EUS, in ichthyology, a genus of fifhes be¬ longing to the order of abodes. I he head is compreffed ; the teeth are placed in the jaws and palate ; the body is oval and flippery ; and the tail is forked J here are three fpecies according to Gmelin, the fiatola, paru, and cu- marca. S PROMBOLI, the moft northern of the Lipari iflands. It is a volcano, which conftantly difcharges much fire and fmoke. It rifes in a conical form above the furface of the fea. On the eaft fide it has three or four little craters ran¬ ged near each other, not at the fummit, but on the decli¬ vity, nearly at two-thirds o its height. But as the furface of the volcano is very nigged and interfered with hollow- ways, it may be naturally concluded, that at the time of fome great eruption, the fummit and a part of this fide fell in, as muft have happened alfo to Veftivius; confequently, the common chimney is at this day on the declivity, al¬ though always in the centre of the whole bale. It is inha¬ bited notwithftandiag its fires ; but care is taken to avoid the. proximity of the crater, which is yet much to be feared. “ I was affured (fays M. de Luc) by an Englifhman, who, like me, had the curiofity to vifit thefe iffes, that the line weather having invited him and his. company to land at Stromboli, they afcended a volcano, whole craters at that time threw out nothing ; but that while they were atten¬ tively viewing them, unapprehenfive of any danger, they were fuddenly fainted by fuch a furious di{charge, as to be obliged to retreat with precipitation, and not without one of the company being wounded by a piece of fcoria,” Of all the volcanoes recorded in hiftory, Stromboli feems to be the only one that burns without ceafing. Etna and Vcfu- - vius often he quiet for many months, and even years, with— out the leaft appearance of fire ; but Stromboli is ever at work, and for ages paft. has been looked upon as the great. , lighthoufe of thefe leas~ E.Long. 15.45. N. Lat. 3c. o. o I ROMBUS, in natural hiftenyya genus of vermes, be¬ longing to the order of tejtacea. The animal is a limax 5 the if ell is univalve and fpiral ; the opening is much dila¬ ted, and ends in a canal which turns to the left. Gmelin enumerates 53 fpccies ; of which only one is peculiar to Britain, the pes pelecani. The fpires are ten; the lip is fingered ; the point very .{harp ; the length two inches. S I RONGOLI, a town ol the kingdom of Naples, with a bifhop s fee. it is fituated on a rugged mountain, is about three miles from the fea, and feven north from St Severino. It is iuppoied to be the ancient Pelelia, which made a con- fpicuous figure in the fecond Punic war by its obftinate re- hftancc agamit Hannibal. Near its wails Marcellus the ri¬ val Stromateus II Strong oli. v 1 Slrontlfe* ^iranfac- tions of the Ir'ijh Aca¬ demy, Vol. V. cTranf ac¬ tions of the Royal Socie ty of Edin. burgh, Vol. ill. S T R C 3 • val of Hannibal was {lain in a flarmifh. E. Long. 17. 26. 1N. Lat. 39. 20. STRONTITES, or strontian earth, a new fpecies of earth lately difeovered at Strontian in Scotland. Who the difeoverer of this earth was we have not learn¬ ed ; but Dr Kirwan fays, the firft information he received of it was from Dr Crawford in the year 1 79^' t-be Mi¬ ners Journal for February 179* a good defeription of its external appearance, with feme account of its chemical pro¬ perties, was publilhed from the obfervations of Mr Suker. Dr Kirwan examined it in Oftober I793> anb found it to he a new earth between the barytic and common limeftone. Dr Hope, who is now joint profeffor of chemiftry with Dr Black in the univerfity of Edinburgh, read a paper on the 4th November 1793 before the Royal Society of Edin¬ burgh, intitled “ An Ascount of a Mineral from Stron¬ tian, and of a peculiar Species of Earth which it contains an abridgment °f which is publifhed in the third volume of the Edinburgh Philofophical Tranfa&icns. Mr SchmeifTer read a paper on the fame fubjedl before the Royal Society of London in May >794) which is publilhed in their Tranf- a&ions for that year, p. 418, &c. Its external charaAers are thefe : Its colour is whitiih or light green ; its luftre common ; its traniparency interme¬ diate between the femitranfparent and opaque ; its fraAure itriated, prefenting oblong diftmA concretions, fomewhat uneven and bent; itshardnefs moderate, being ealily ferateh- ed, but notferaped. It is very brittle ; and its fpecific gra¬ vity from 3,4 to 3,644. For a full account of its chemical qualities we muft refer to the books already mentioned, as all the accounts of it which we have feen are too long to infert here, and as we do not confider the circumftance of its being a newly difeo¬ vered earth a fufficient reafon for running into a tedious de¬ tail till its utility be afeertained. We fhall, however, men¬ tion fome of its mod remarkable qualities. It requires 180 times its weight of water at a low temperature to diilolve it. When diffolved in boiling water, and allowed to cool, it de- pofits tranfpareut cryftals, which when expofed to the air become white and powdery. It is not afleAed by the ful- phuric acid ; but when diluted, 10,000 parts of it will dif- folve one of ftrontites. Diluted nitric acid diffolves it ra¬ pidly. The muriatic acid, whether diluted or oxygenated, diffolves it in a fimilar manner. Strontites has a ftrong refemblance to barytes, but eflen- tially differs from it. Its fpecific gravity is lefs; it parts with its carbonic acid when urged by heat fomewhat more readily, and without fuffering lulion ; when calcined, it im¬ bibes moifture with vaffly greater avidity, fwelling and cracking with more heat and noife. Strontites diffolves much more abundantly in hot water than barytes; and the form of the cryftals of thefe pure earths is very diffimitar. The compounds generated by ffrontites differ from thole of barytes. It will fufflce to mention the nitrate and muriate. This earth, united to nitric and muriatic acid, forms falts that futfer changes from expofure to air, which do not hap¬ pen to the nitrate and muriate of barytes. They are like- wife much more foluble in water, and have cryftals of a pe¬ culiar figure. The combinations of ftrontites with acids are not, like thofe of barytes, decompoled by pruffiate of lime or ofbpotafh. Strontites and its compounds tinge fame, which barytes does not. Laftly, thefe earths difagree in the order of their attraAions. From thefe conhderations it is concluded, that the mineral is not aerated barytes. It alfo is diftinguifhed from calcareous fpar or limeftone : for it is much heavier, and retains its fixed air with more ot'ftinacy in the fire. The incomparably greater folubility $ ] S T R of the pure earth in hot than in cold water, and the etyft&l- 3tro>48 line form it affumes, fufficiently diftinguifh it from lime, which the difpofition of the nitrate and muriate to cryftai- \ lize no lefs tends to do. The moft remarkable quality of ftrontites is that ef tin¬ ging flame of a red colour. The muriate has it in the moft eminent degree, and its effeAs are well exhibited by putting a portion of the fait on the wick of a candle, which is there¬ by made to burn with a very beautiful blood-red flame. The nitrate Hands next, then cryftallized ftrontites, and after k the acetite. A hundred parts of ftrontites are compoled of 61.2f of earth, 30.20 of carbonic acid, and 8.59 of water, ST ROPHE, in ancient poetry, a certain number of verfes, including a perfeA fenfe, and making the firft part of an ode. See Poetry, n° 130. STRUM.dE, fcrophulous tumors arifirg on the neck and throat, conftituting what is commonly called the king's evil. Sec Medicine, n° 349. STRUMPFIA, in botany ; a genus of plants belonging to the clafs of fyngenejia, and to the order of monogamia. T he calyx is quinquedentate and luperior ; the corolla is pentapetalous ; and the berry monofpermous. There is only one fpecies, the maritima. STRUTHIO, in natural hiftory ; a genus of birds be¬ longing to the order of grallx of Linnaeus; but, according to the new claffification of Dr Latham, it forms, along with the dodo, caffuarius, and rhea, a feparate order under the name of’Jlruthious, As the dodo or didus, and rhea, have been already deferibed in their proper place, we will now give fome account of the oftrich and calTowary. I. The Ostrich (the Camelus of Linnaeus) has a bill p|a,e fomevvhat conical ; the wings are fo fhort as to be unfit cccclxxh for flying ; the thighs and fides of the body are naked ; the feet are formed for running, having two toes, one only of which is furnifhed with a nail. In this refpeA it differs entirely from the caflbwary, which has three toes complete. The oftrich is without doubt the largeft of all birds : it is nearly eight feet in length, and when Handing upriuht from fix to eight feet in height. We are told in the Gentleman’s Magazine*, that two oftriches were fhown # Voln in London in the year 1750, a»d that the male was xc feetp. 53^ in height, and weighed three hundred weight and a quarter. T he head and bill fomewhat refemble thofe of a duck ; and the neck may be likened to that of a fwan, but that it is much longer; the legs and thighs refemble thofe of an hen; though the whole appearance bears a ftrong refemblance to that of a camel. But though ufually feven feet high from the top of the head to the ground, from the back it is only four ; fo that the head and neck are above three feet Ions. From the top of the head to the rump, when the neck is ftretched out in a right line, it is fix feet long, and the tail is about a foot more. One of the wings, without the fea¬ thers, is a foot and an half ; and being ftretched out, with the feathers, is three feet. The plumage is much alike in all; that is, generally blactc and white; though iome of them are faid to be grey. There are no feathers on the fides, nor yet on the thighs, nor un¬ der the wings. The lower part of the neck, about half way, is covered with ftill fmaller feathers than thofe on the belly and back ; and thoie alfo are of different colours. All thefe feathers are of the fame kind, and peculiar ' to the oftrich ; for other birds have feveral forts, fome of which are foft and downy, and others hard and ftrong. Oftrich-feathers are almoft all as foft as down, being utterly unfit to ferve the animal for flying, and ftill lefs adapted to be a proper defence againit external injury. The feathers s T R [ 39 7 s T R Strothin. 0f othfr birds have the webs broader «n one fide than the -—r~J other, but tiiofe of the oitrich have their (haft exa&ly in the middle. ?j/he upper part of the head and neck are covered with a very fine clear white hair, that fhines like the brifilts of a hog; and in fgnae places there are fmall tufts of it, confining of about i 2 hairs, which grow from a iingle ihaft about the thicknefs of a pin. At the end of each wing there is a kind of fpur almoft like the quill of a porcupine. It is an inch long, being hol¬ low and of an horny fubltance. There are two of thefe on each wing ; the large ft of which is at the extremity of the bone of the wing, and the other a foot lower. The neck fetms to be more {lender in proportion to that of other birds, from its not being furnilhed with feathers. The fir in in this part is of a livid flelh-colour, which fome, improperly, would have to be blue. The bill is fhort and pointed, and two inches and an half at the beeinning. The external form of the eye is like that of a man, the upper eye-lid be¬ ing adorned with eye-lalhes which are longer than thole on the Ikl below. The tongue is fmall, very fhort, and com- pofed of cartilages, ligaments, and membranes, intermixed with fiefhy fibres. In fome it is about an inch long, and very thick at the bottom ; in others it is but half an inch, being a little forked at the end. '1 he thighs are very flefhy and large, being covered with a white Ikm inclining to rednefs, and wrinkled in the man¬ ner of a net, whole mefiies will admit the end of the finger. Some have very imall feathers here and there on the thighs; aud others again have neither feathers nor wrinkles. What are called the legs of birds, in this are covered before with laige leaks. Ihe end af the foot is cloven, and has two very large toes, which, like the leg, are covered with kales Thefe toes are of unequal iizes. The largeft, which is on the innde, is feven inches long, including the claw, which is near three-fourths of an inch in length, and almoft as broad. J he other toe is but four inches long, and is with¬ out a claw. 0 diinks; and tne place of its habitation feems to confirm Struthio. the ahertion. In thefe formidable regions oftnehes are feen jv ™"*" in large flocks, which to the diftant fpeftator appear like a regiment of cavalry, and have often alarmed a whole cara- van.^ There is no defert, how barren foever, but what is capable of fupplying thefe animals with provifion ; they eat aimoft every thing ; and thefe barren tracts are thus doubly grateful, as they afford both food and fecurky. The oftrich is of all other animals the moft voracious. It will devour leather, grals, hair, iron, ftones, or any thing that is given, i hofe fubftances which the coats of the itomach cannot {often* pafs whole ; lo that j^lafs, ftones, or iron, are exclu- ** ded in the form in which they were devoured. In an oftrich diftecled by Ranby, there appeared fuch a quantity of he¬ terogeneous fubftances, that it was wonderful how any ani¬ mal could digeft fuch an overcharge of nouriftunent. * Va- lifmen alfo found the firil ftoniach filled with a quantity of incongruous fubftances ; grafs, nuts, cords, ftones, glals, brals, copper, iron, tin, lead, and wood ; a piece of (lone was found among the reft that weighed more than a pound. He law one of thefe animals that was killed by devouring a. quantity of quicklime. It would feem that the oftrich is- obliged to fill m> the great capacity of its ftomach in order to be at eate ; but that nutritious fubitances not occurring* it pouis in whatever offers to fupply the veil. In their native deferts, however, it is probable they live chiefly upon vegetables, where they lead an inoffenfive and locial life ; the male, as Thevenot affures us, afforting with the female with connubial fidelity. They are laid to be very much inclined to vtntry ; and the make of the parts in both fexes ieems to confirm the report. It is probable alfo they copulate like other birds, by comprefiion. They lay very large eggs, fome of them being above five inches in dia¬ meter, and weighing above fifteen pounds. Thefe eggs, have a very hard fheil, fomewhat refembling thofe of the crocodile, except that thofe of the latter are lefs and round- I he internal parts of this animal are formed with no lefs iurprifing peculiarity. At the top of the breaft, under the Ikm, the at is two inches thick ; and on the fore-part of iV.lfAh-7!11 -S 7 hard,aS fuet’ aad about two inches Til S* r ""I pW r Xt has two di/Hna ftoraachs. f he hrft, which is lowermoft, in its natural fituation fome- vvhat refembles tne crop-in other birds; but it is confider- ab y larger than the other ftomach, and is furniflied with ftroug nmfcular fibres, as well circular as longitudinal. The fecond ftomach or g.zxard has outwardly the fhape of the ftomach 0 d man ; arid HPon opening is always \rnnd filled with a variety of difeordant fubllanee, ; hay IrX barlev tLT;5' fomc a*" ftTfcj ::;ed s:;; ^ _n ., lt 1° tnc?1 lb a natlve oriIy of the torrid regions of Africa and has long been celebrated by thofe who have hn ? A'r‘ca» to mention the animals of ,ha region rf fl ^ OCCarGo" heel in Scripture as unfit ,o d 'at™ and n f f T C' N cient writers deferibe it as well 1, * ■* 1 ^ ^ tbe an_ the t .T , , as wel1 known in their times, i ike the race of the elephant, it is tranfmhierl /llce tnwture} and has never been know! t!? ^"’1'"'“‘’T that country which firil produced it It ff1 °Jt " to hve amono- thp 1%, ,1 F j e • lt’ ‘cems formed zone ;• and as n f/ 7 bU”UHff dcferts of ^ torrid penial influ’ence J 11 0W"S itS bIrth to fhs*'r or mere fertile * ’fh c mio rates mto traifts more mild * fhe Arabians affm that the oftrich never The feafon for laying depends on the climate where the animal is bred. In the northern parts of Africa, this fea- kn is about the beginning of July; in the fouth, it is about the latter end of December. Tbefe birds are very prolific, and lay generally from 40 to 50 eggs at one clutch, which- are as big as a child’s head. It has been commonly report¬ ed, that the female depofits them in the land, and covering them up, leaves them to be hatched by the heat of the cli¬ mate, and then permits the young to ihift for themfelves. Very httfe o* this, however, is true : no bird has a ftron-rer aftecuon for her young than the oftrich, nor none watches her eggs with greater affiduity. It happens, indeed, in thofe hot climates, that there is lefs necefiky for the continual incubation of the female ; and Are more frequently leaves her eggs, which are in no danger of being chilled by the- weather : but though (he fometimes forfakes them by day, ke always carefully broods over them by night; and Kol- ben wdro has feen great numbers of them at the Cape of Good Hope, affirms, that they fit on their eggs like other bnds, and that the male and the female take this office by turns, as he had frequent opportunities of obferviW Nor is .t more true what rs faid of their forfaking their youn^v aiter they are excluded the ffiell. On the contrary7, thf young ones are not even able to walk for feveral days after they are hatched. During this time the old ones are very afhduous m Applying them with grafs, and very careful to de.end them from danger; nay, they encounter every dan- ger m therr defence. The young, when brought forth, are ,, £‘n a^i'col°ur the firft year, and are covered with feathers ad over. But in time thefe feathers drop; and thofe parts which S T It t 40 1 S T R Sfraihio. which ave covered afTurae a different and more becoming plumage. The beauty of a part of this plumage, particularly the long feathers that compofe the wings and tail, is the chief rcafon that man has been fo aftive in purfuing this harmlefs bird to its deferts, and hunting it with no 1'mall degree oi expence and labour. The ancients ufed thofe plumes in their helmets ; our military wear them in their hats ; and the ladies make them an ornament in their drefs. Thofe ■feathers which are plucked from the animal while alive are much more valued than thole taken when dead, the latter ** being dry, light, and fubjedl to be worm-eaten. Bdide the value of their plumage, fome of the favage na¬ tions of Africa hunt them alfo for their flefh ; which they confider as a dainty. They fometimes alfo breed thefe birds tame, to eat the young ones, of which the females are hud to be the greateft delicacy. Some nations have obtained the name of Struthophagl, or ojlx'ich eaters, ftom their peculiar fondnefs for this food ; and even the Romans themfelves -were not averfe to it. Even among the Europeans now, the egcrs of the oftrich are faid to be well tafted, and ex¬ tremely nourifhing ; but they are too fcarce to be fed upon, although a lingle egg be a lufficient entertainment lor eight men. As the fpoils of the oftrich are thus valuable, it is not to be wondered at that man has become their moft afliduous purfuer. For this purpofe, the Arabians train up their beft and fleeteft- horfes, and hunt the oftrich ftill in view. Per¬ haps, of all other varieties of the chafe, this, though the moft laborious, is yet the moft entertaining. As foon as the hunter comes within fight of his prey, he puts on his horfe with a gentle gallop, fo as to keep the oftrich ftill in fight; yet not fo as to terrify him from the plain into the moun¬ tains. Of all known animals, the oftrich is by far the fwfft- eft in running ; upon obferving himfelf, therefore, purfued at a diftance, he begins to run at nrft but gently ; either infenfible of his danger, or fure of efcaping. In this fitua- tion, he fomewhat refembles a man at full fpeed ; his wings, like two arms, keep working with a motion correfpondent to that of his legs; and his fpeed would very foon fnatch him from the view of his purfuers ; but, unfortunately for the filly creature, inftead of going off in a direff line, he takes his courfe in circles; while the hunters ftill make a fmall courfe within, relieve each other, meet him at unex- pe&ed turns, and keep him thus ftill employed, ftill follow¬ ed, for two or three days together. At laft, fpent with fa¬ tigue and famine, and finding all power of efcape impoffible, he endeavours to hide himfelf from thofe enemies he cannot avoid, and covers his head in the land or the firlt thicket he meets. Sometimes, however,, he attempts to face his pur¬ fuers ; and though in general the moft gentle animal in na¬ ture, when driven to deiperation he defends himfelf with his beak, his wings, and his feet. Such is the force of his motion, that a man would be utterly unable to withftand him in the fhock. The Struthophagi have another method of taking this bird : they cover themfelves with an oftrich’s fkin, and paf- fing up an arm through the neck, thus counterfeit all the motions of this animal. By this artifice they approach the oftrich, which becomes an eafy prey. He is fometimes alfo taken by dogs and nets ; but the moft ufual way is that mentioned above. When the Arabians have thus taken an oftrich, they cut its throat; and making a ligament below the opening, they fhake the bird as one would rinfe a barrel; then taking ©If the ligature, there runs out from the wound in the throat a ■confiderable quantity of blood mixed with the lat of the ani- ®al, and this is confidered as one of their greateft dainties. They next /lea the bird 5 and of the fit in, which is ft rang and thick, fometimes make a kind of veft, which anfwers the purpofes of a cuirats and a buckler. There are others who, more compaffionate or more pro¬ vident, do not kill their captive, but endeavour to tame it, for the purnofes or' {applying thofe feathers which are in fo great requeit. The inhabitants of Dara and Lybia breed up whole flocks of them, and they are tamed with very little trouble. But it is not for their feathers alone that they are prized in this domeftic ftate; they are often ridden upon and ufed as horfes. Moore aflures us, that at Joar he faw a man travelling upon an oftrich ; and Adanfon afterts, that at the fadlory of Podore he had two oftriches, which were then young, the ftrongeft of which ran fwifter than the beft Englilh racer, although he carried two negroes on his back. As foon as the animal perceived that it was thus loaded, it fet off running with all its force, and made feveral circuits round the village ; till at length the people were obliged to Hop it by barring up the way. Howr far this ftrength and fwiftnefs maybeufeful to mankind, even in a polifhed ftate, is a matter that perhaps deferves inquiry. II. The Cassowary (the Cafuarius of Linnaeus, and Ga- leated CaJJb'wary of Dr Latham) was firft brought into Eu¬ rope from Java by the Dutch about the year 1597* nearly equal in fize to the oftrich, but its legs are much thicker and ftronger in proportion. This conformation gives it an air of ftrength and force, which the fiercenefs and iin- gularity of its countenance confpire to render formidable It is five feet and an half long from the point of the bill to the extremity of the claws. The legs are two feet and an half high from the belly to the end of the claws. The head and neck together are a foot and an half; and the largeft toe, including the claw, is five inches long. The claw alone of the leaft toe is three inches and a half in length. The wing is fo fmall that it does not appear, it being hid under the feathers of the back, in other birds, a part of the feathers ferve for flight, and are different from thofe that ferve mere¬ ly for covering; but in the caffowary all the feathers are of the fame kind, and outwardly of the fame colour. They are generally double, having two long ihafts, which grow out of a fhort one, which is fixed in the /km. Thofe that are double are always of an unequal length ; for fome are 14 inches long, particularly on the rump, while others are not above three. The beards that adorn the ftem or fhaft are about half-way to the end, very long, and as thick as an horfe-hair, without being fubdivided into fibres. The ftem or draft is flat, (hining, black, and knotted below; and from each knot there proceeds a beard; likewife the beards at the end of the large feathers are perfectly black, and to¬ wards the root of a grey tawny colour ; fhorter, more foft, and throwing out fine fibres like down; fo that nothing ap¬ pears except the ends, which are hard and black ; becaufe the other part, compofed or down, is quite covered. There are feathers on the head and neck ; but they are fo ftrort and thinly fown, that the bird’s fkin appears naked, except towards the hinder part of the head, where they are a little longer. The feathers which adorn the rump are extremely thick; but do not differ in other refpe&s from the reft, ex¬ cepting their being longer. The wings, when they are de¬ prived of their feathers, are but three inches long ; and the feathers are like thofe on other parts of the body. The ends of the wings are adorned with five prickles, of different lengths and thicknefs, which bend like a bow: thefe are hollow from the roots to the very points, having only that flight fubftmee within which all quills are known to have. The longeft of thefe prickles is 11 inches ; and it is a quar¬ ter of an inch in diameter at the root, being thicker there than towards the extremity; the point feema bioken off- a The Plate CC VC L XXXVI. c/u'rt/a/uii. 'en’Txvrt' //(/nr r/./■}.■// S T It Struthio. The part, however, which moft dHlIflguhhes this animal is the head ; which, though fmall, like that of an oftrich, does not fail to infpire fome degree of terror. It is bare of feathers, and is in a manner armed with an helmet of horny fubftance, that covers it from the root of the bill to near half the head backwards. This helmet is black before and yellow behind. Its fubflance is very hard, being formed by the elevation of the bone of the Ikull; and it confifts of fe- veral plates, one over another, like the horn of an ox. Some have fuppofed that this was ihed every year with the fea¬ thers ; but the moft probable opinion is, that it only exfo¬ liates flowly like the beak. To the peculiar oddity of this natural armour may be added the colour of the eye in this animal, which is a bright yellow; and the globe being above an inch and a half in diameter, give it an air equally fierce and extraordinary. The hole of the ear is very large and Open, being only covered with fmall black feathers. The fides of the head, about the eye and ear, being deftitute of any covering, are blue, except the middle of the lower eye¬ lid, which is white. The part of the bill which anfwers to the upper jaw in other animals is very hard at the edges above, and the extremity of it is like that of a turkey-cock. The end of the lower mandible is flightly notched, and the whole is of a greyiih brown, except a green fpot on each fide. As the beak admits a very wide opening, this con- tributes not a little to the bird’s menacing appearance. The neck is of a violet colour, inclining to that of Hate ; and it is red behind in feveral places, but chiefly in the middle. About the middle of the neck before, at the rife of the large feathers, there are two proceffes formed by the fkin, which referable fomewhat the gills of a cock, but that they are blue as well as red. The Ikin which covers the fore¬ part of the breaft, or. which this bird leans and refts, is hard, callous, and without feathers. The thighs and legs are co¬ vered with feathers, and are extremely thick, ftrong, ftraight, and covered with fcales of feveral ftiapes ; but the legs are t 41 3 S T R ir?.r!’ ^ ft°nes> but even live and burning coals, without Struthio teftifying the fmalleft fear or feeling the leaft injury. It is II faid, that the paflage of the food through its gullet is per- Str>'mon- formed fo fpeedily, that even the very eggs which it has ~ fwallowed whole pafs through it unbroken in the fame form they went down. In faft, the alimentary canal of this ani. mal, as was oblerved above, is extremely fhort; and it may happen, that many kinds of food are indigeftible in its fto- mach, as wheat or currants are to man, when fwallowed whole. The cafibwary’s eggs are of a grey-afh colour, inclininar to green. They are not fo large nor fo round as thofe of the oftrich. They are marked with a number of little tu¬ bercles of a deep green, and the fhell is not very thick. The largeft of thefe is found to be 15 inches round one way. and about 12 the other. 1 The fouthern parts of the moft eaftern Indies feem to be the natural climate of the caflowary. His domain, ifwc may fo call it, begins where that of the oftrich terminates. The latter has never been found beyond the Ganges; while the caffowary is never feen nearer than the iflands of Banda, Sumatra, Java, the Molucca iflands, and the correfponding parts of the continent. _ Yet even here this animal feems not to have multiplied in any confiderable degree, as we find one of the kings of Java making a ptefent of one of thefe biids to the captain of a Hutch (hip, confidering it as a very great rarity. 2. The Cafuarius Novt Hollanduty or New Holland caf¬ fowary, differs confiderably from the common caffowary. It is a much larger bird, ftanding higher on its legs, and having the neck longer than in the common one. Total GWwr length feven feet two inches. The bill is not greatly diffe-^'7^’' rent from that of the common caffowary ; but the horny 0?^ appendage or helmet on the top of the head in this fpecies J is totally wanting: the whole of the head and neck is alfo covered with feathers, except the throat and fore part of t^faTe likewife^r ‘hd '^h'h “ “"f oth"Pla“- The ,hc neck^bout haKa^Xh aV„«Vo wdl feaXred t !Xt: btx ^and within. U ance’ blackwithout and white The plumage in general confifts of a mixture of brown The internal parts are equally remarkable Th, , (T flT ^ are fomewhat curled or bent at bafe. Upon the whole! it has the h«d „f\, d E' iX’ T' 15 ,thtre1 ;,n)’ appearance of a tail. The legs are e.eof a l™, the defence of a porcopine, New HoHand, as feeera, -r.1. n r- 8 . KPe.ct.e<1 that the caf- of them have been feen about Botany Bay and other parts. r t> ^ mat tnc cal- Wary was one of the moft fierce and terrible animals of the creation. But nothing is fo oppofite to its natural charac- " • a\tack8 others > and inftead of the bill, when attacked, it rather makes ufe of its legs, and kicks like a l:rXr"g3nft;ts ^ ^ The mannerin which thisanimal moves is not lefs extraor- dmary than tts appearance. Inftead of goint; dircaly fo!- ward, it feems to kick up behind with one leg j and7 then making a bound onward with the other, it goes with fu!h prodigious velocity, that the fwifteft racer would be left far «heTohftrichmeE,CSr'e Ofrrac!,0“tn'fs w,,:ch we ™ lowseverv th' .1 “ ftr0ng^. t're- Tile calTowary f.al- let. The D, "ithwt C°T the capacity of its gul- Vot. XVIII. Paru’,1131 11 devour not only glafs, Although it cannot fly, it tuns fofwiftly, that a greyhound can fcarcely overtake it. The flelh is faid to be in taile not unlike beef. . ^ f RUTHIOLA, in botany ; a genus of plants belong¬ ing to the clafs of tetrandria, and order of monogynia. The corolla is wanting ; the calyx is tubulous, with eight glan- dules at its mouth ; the berry is without juice, and mono- fpermous. The fpecies are three, the virgata, ereda, and nana, all of foreign extra&ion. . STRYCHNOS, in botany : A genus of plants belong- ing to the clafs of pentandria, and order of monogynia ; and in the natural fyftem ranging under the 28th order, Luride. The corolla is quinquefid; the berry is unilocular, with a woody bark. 1 he fpecies are three, the nux vomica, co« lubnna, and potatorum, natives of foreign countries. BTRYMON (anc. j, formerly Conozus ,’.a river con- ^ ftituting S T U r 4* i S T U Strvpe, Suiart. ftitutinp* tKs aficieot limits of Macedonia and Thrace ; rifing w in mount Scombrus (Ariftotle). Authors differ as to the ' modern name of this river. . STRYPE (John), was defcended irom a German tami- ly, born at London, and educated at Cambridge. _ He was vicar of Low Layton in Effex, and diftinguifhed hnnfelf by his compilations of Lives and Memoirs ; in which, as Dr Eirch remarks, his fidelity and induftry will always give a value to his writings, however deftitute they may be of the graces of ftyle. lie died in 1737, after having enjoyed his vicarage near 68 years. . . STUART (Dr Gilbert), was born at Edinburgh in the year 1742- His father Mr George Stuart was profef- for of humanity in the univerfity, and a man of confiderable eminence for his claffical talk and literature. For thde ac- complifhments he was probably indebted in no fmall degree to his relation the celebrated Ruddiman, with whom both he and his fon converfed familiarly, though they afterwards xmited to injure his fame. Gilbert having finifhed his claflical and philofophical ftu- tlies in the grammaf-fchool and univerfity, applied himfelf to jurifprudence, without following or probably intending to follow the profeffion of the law. For that profeffion he lias been reprefented as unqualified by indolence ; by a paf- fion which at a very early period of life he difplayed for ge¬ neral literature ; or by boundlefs diffipation and all thefe circumftances may have contributed to make him relinquifh purfuits in which he could hope to fucceed only by patient perfeverance and ftrift decorum of manners. That he did not walk his youth in idlenels, is, however, evident from An Hiftorical Differtation concerning the Antiquity of the Britilh Conftitution, which he publifhed before he had com* pleted his twenty-fecond year, and which had fo much me¬ rit as to induce the univerfity of Edinburgh to confer upon the author, though fo young a man, the degree of LL.D. After a ftudious interval of fome years, he produced a valuable work, under the title of A View of Society in Europe, in its Progrefs from R.udenefs to Refinement; or, Inquiries concerning the Hdtory of Laws, Government, and Manners. He had read and meditated with patience on the moft important monuments of the middle ages ; and in this volume (which fpeedily reached a fecond edition) he aimed chiefly at the praife of originality and invention, and ^ifcovered an induftry that is feldom connedkd with ability and difcernment. About the time of the publication of the fit ft edition of this performance, having turned his thoughts to an academical life, he alked for the profefibr- fhip of public law in the univerfity of Edinburgh. Accord¬ ing to his own account he had been promifed that place by the minifter, but had the mortification to fee the profeflbr- fhip beftowed on another, and all his hopes blafted by the influence of Dr Robertfon, whom he reprefented as under ob- Jigations to him. ^ To the writer of this article, who was a, ftranger to thefe rival candidates for hiftorical fame, this part of the ftory feems very incredible ; as it is not eafy to conceive how it ever could be in the power of Dr Stuart to render to the learned Principal any efiential femce. It was believed in¬ deed by the earl of Buchan, and by others, who obferved that the illiberal jealoufy not unfrequent in the world of letters, was probably the fource of this oppofition ; which entirely broke the intimacy of two perfons who, before that time, were underftood to be on the moft friendly footing with each other. Ingratitude, however, is as likely to have * Chalmers vJce of Dr Stuart as of Dr Robertfon; for we *” hT>Sn-^ have been told by a writer *, who, at leaft in one inftance, 1 has completely proved what he affirms, that “ fuch was Gil¬ bert Stuart’s laxity of principle as a man, that he confider. ed ingratitude as one of the moft vernal fins ; fuch was his conceit as a writer, that he regarded no one’s merits but his own ; fuch were his difappointments, both as a writer and a man, that he allowed his peeviihnefs to four into ma¬ lice, and indulged his malevolence till it fettled in corrup- Stuart, Stucco. tion. Soon after this difappointment Dr Stuart went to Lon¬ don, where he became from 1768 to 1774 one of the wri¬ ters of the Monthly R eview. In 17 7 2 Dr Adam^reftor of the high fchool at Edinburgh, publiihed a Latin Grammar, which he intended as an improvement of the famous Ruddi- man’s. Stuart attacked him in a pamphlet under the name of Bufoly, and treated him with much feverity. In do- injr this, he was probably a&uated more by fome perfonat difiike of Dr Adam than by regard for the memory of his learned relation; for 011 other occafions he fhowed fufneient- ly that he had no regard to Ruddiman’s honour as a gram¬ marian, editor, or critic. _ In i-774 he returned to his native city,, and began tne Edinburgh Magazine and Review, in which he difcufled the liberty and conftitution of England, and diftinguifhed himfelf by an inquiry into the charaaer of John Knox the reformer, whofe principles he reprobated in the feyereft terms. About this time he revifed and publiftied Sullivan’s Ledures on the Conftitution of England. Soon after he turned his thoughts to the hiftory of Scotland, and pub¬ lifhed Obfervations concerning its Public Law and Confti- tutional ITiftory; in which he examined with a critical care the preliminary book to Dr Robertfon s Hiftory. His next work was The Hiftory of the Reformation ; a book which deferves praife for the eafy dignity of the narrative* and for ftrid impartiality. His laft great work, The HiU tory of Scotland from the Eftablifhment of the Reformation to the Death of Queen Mary, which appeared in 1782, has been very generally read and admired. PL's purpofe was to vindicate the char after of the injured queen, and expofe the weaknefs of the arguments by which Dr Robertfon had en¬ deavoured to prove her guilty: but though the ftyle of this work is his own, it contains very little matter.which was not furmfhed by Goodall and Pytler ; and it is with the arms which thefe two writers put into his hands that Dr Stuart vanquished his great antagonift. In 1782 he once more vifned London, and engaged m the Political Herald and Englifh Review ; but the jaundice and dropfy increafing on him, he returned by fea to his na¬ tive country, where he died m the houfe of his father on the 13th of Auguft 1786. In his perfon Dr Stuart was about the middle fize and juftly proportioned. His countenance was modeft and ex- preffive, fometimes glowing with fentiments of friendflup, of which he was truly fufeeptible, and at others darting that fatire and indignation at lolly and vice which appear in feme of his writings. He was a boon companion ; and, with a conftitutien that might have Hood the Ihock of ages, he fell a uremature martyr to intemperance. His talents were cer¬ tainly great, and his writings are ufeful ; but he feems to have been influenced more by paffion than prejudice, and in his charafter there was not much to be imitated. STUCCO, in building, a compolition of white marbte pulvenfed, and mixed with plaikr ol lime ; and the whole being lifted and wrought up with water, is to be ufed like common plaikr r this is called by Pliny marmoratum opus, and albarium opus. ■ .... A patent has been granted to Mr B. Higgins for in- ven ing a new kind of ftucco, or water-cement, more firm and durable than any heretofore. Its compofition, as ex- trafted S T U r 43 1 S T U Ptuf?o. traced from the fpecification figned by Idmfelf, Is as fob V—^Iows: “ Drift-farid, or quarry (a) fand, which conjifts chief-, ly of hard quartofe fiat-faced grains with fharp angles; which is the freeft, or may be moll eafily freed by waffling, from clay, fairs, and calcareous, gypfeous, or other grains lefs hard and durable than quartz ; which contains the fmall- eft quantity of pyrites or heavy metallic matter infeparable by wafiring ; and which fuffers the fmalleft diminution of its bulk in wafhing in the following manner—is to be pre¬ ferred before any other. And where a coarfe and a fine fand of this kind, and correfponding in the fize of their grains with the coarfe and fine fands hereafter deferibed, cannot be eafrly procured, let fuch fand of tbe foregoing quality be chofen as may be forted and cleanfed in the fol¬ lowing manner: “ Let the fand be lifted in ftreaming clear water, thro’ a fieve which fhall give pafiage to all fuch grains as do not exceed one-fixteenth of an inch in diameter; and let the ft ream of water and the fitting be regulated fo that all the fand, which is much finer than the Lynn-fand commonly ufed in the London glafsjhoufes, together with clay and every other matter fpecifically lighter than fand, may be wafhed away with the ftream, whilft the purer and coarfer fand, which pafles through the fieve, fubfides in a conveni¬ ent receptacle, and whilft the coarfe rubbilh and rubble re¬ main on the fieve to be rejected. “ Let the fand which thus fubfides in the receptacle be ■walhed in clean ftreaming water through a finer fieve, fo as to be further cleanfed and foiled into two parcels ; a coar¬ fer, which will remain in the fieve which is to give paflage to fuch grains of fand only as are lefs than one-thirtieth of an inch in diameter, and which is to be faved apart under the name of coarfe fancl; and a finer, which will pafs thro* State*, the fieve and fubfide in the water, and which is to be faved ^ apart under the name offine fond.—Let the coarfe and the fine fand be dried feparately, either in the fun or on a clean iron-plate, fet on a convenient furface, in the manner of a fand-heat (b), “ Let lime be chofen (c) which is ftone-lime, which, heats the moft In flaking, and flakes the quickeft when du¬ ly watered ; which is the frefheft made and clofeft kept ,; which difl’olves in diftilled vinegar with the leaft effervef- cence, and leaves the fmalleft refidue infolufele, and in this relidue the fmalleft quantity of clay, gypfum, or martial matter. “ Let the lime chofen according to thefe important rules be put in a brafs-wired fieve to the quantity of 14 pounds. Let the fieve be finer than either of the foregoing ; the fi¬ ner, the better it will be: let the lime be flaked (d) by plunging it in a butt filled with foft water, and railing it out quickly and fuffering it to heat and fume, and by re¬ peating this plunging and railing alternately, and agitating the lime, until it be made to pals through the fieve into the water; and let the part of the lime which does not eafily pafs through the fieve be rejected: and let frefh portions of the lime be thus ufed, until as many (e) ounces of lime have parted through the fieve as there are quarts of water in the butt. Let the water thus impregnated Hand in the butt clofely covered (f) until it becomes clear ; and through wooden (g) cocks placed at different heights in the butt, let the clear liquor be drawn off as fall ( h ) and as low as the lime fubfides, for ufe. This clear liquor I call the ce¬ menting liquor (1). The freer the water is from faline mat¬ ter, the better will be the cementing liquor made with it. F 2 “ Let (a) “ This is commonly called pit-fand. (b) “ The fand ought to be ftirred up continually until it is dried, and is then to be taken off; for otherwife the eva¬ poration will be very flow, and the fand which lies next the iron plate, by being overheated, will be difcoloured. (c) “ "1 he preference given to ftone-lime is founded on the prefent practice in the burning of lime, and on the cloier texture of it, which prevents it from being fo foon injured by expofure to the air as the more fpongy chalk- lime is; not on the popular notion that ftone-lime has fomething in it whereby it excels the beft chalk in the cementing properties.. The gypfum contained in lime-ftone remains unaltered, or very little altered, in the lime, after the buro- jng; but it is not to be expeAed that clay or martial matter fhould be found in their native ftate in well-burned lime & for they concrete or vitrify with a part of the calcareous earth, and conftitute the hard grains or lumps which remain un» diflolved in weak acids, or are feparable from the flaked lime by lifting it immediately through a fieve. (d) “ This method of impregnating the water writh lime is not the only one which may be adopted. It is, how¬ ever, preferred before others, becaufe the water clears the fooner in confequence of its being warmed by the flaking lime ; and the gypfeous part of the lime does not diffufe itfelf in the water fo freely in this way as it does when the lime is flaked to fine powder in the common method, and is then blended with the water ; for the gypfeous part of the lime flakes at lirft into grains rather than into fine powder, and will remain on the fieve after the-pure lime has paffed through, long enough to admit of the intended feparation ; but when the lime is otherwife flaked, the gypfeous grains have time to flake to a finer powder, and pafiing through the fieve, difiblve in the water along with the lime. I ave imagined that other advantages attended this method of preparing the lime-water, but I cannot yet fpeak of them with precifion. * it o 1 r (e) “ If the water contains no more acidulous gas than is ufually found in river or rain water, a fourth part of this quantity of lime, or lefs, will be fufficient. (f ) “ I he calcareous cruft which forms on the furface of the water ought not to be broke, for it afiifts in excluding the air, and preventing the abforption of acidulous gas whereby the lime-water is fpoiled. (g) i Brafs-cocks are apt to colour a part of the liquor. <$ -Time-water cannot .be kept many days unimpaired, in any veffels that are not perfectly air-tight. If the liquor be drawn off before it clears, it will contain whiting, which is injurious ; and if it be not inftantly ufed after it is drawn limpid Tom toe bntt into open veffels, it will grow turbid again, and depofit the lime changed to whiting by the gas ab- orbed fiom the air. i he calcareous matter which fubfides in the butt refembles whiting the more nearly as the lime has een more fpan'ngly employed; in the contrary circumftances, it approaches to the nature of lime; and in the intermedi- ate, at^’ ^ ^ common compofition of the plafterers for infide ftucco. 5, t‘me writing this Ipecification, I preferred this term before that of lime-water, on grounds which I aad not fufficiently examined. s T U [ 44 ] S T. U take 98 pounds of the fine fand, wet it with the -cementmg t 5 liquor, and mix it with the purified lime and the bone- ^ afh in the quantities and in* the manner, iabove defcribed ; with this difference only, that 15 pounds of lime, or (o) thereabouts, are to be ufed inftead of r 4 pounds, if the greater part of the fand be as fine as Lynn fand. . This I call ivater-cement fine-grained. It is to be ufed in giving the laft coating, or the finifh to any work intended to imitate the finer-grained ftones - or ftucco. But it may be applied to all the ufes of the water-cement coarfe-grained, and in the fame manner. “ When for any of the foregoing purpofes of pointing, building, &c. fuch a cement is required much cheaper and coarfer-grained, then much coarfer clean fand than the forego¬ ing coarfe fand, or well-wafhed fine rubble, is to be provided. Of this coarfe fand or rubble take 56 pounds, of the forego¬ ing coarfe fand 28 pounds, and oi the fine fand 14 pounds £ and after mixing thefe, and wetting them with the cement¬ ing liquor in the foregoing manner, add 14 pounds, or fomewhat lefs, of the (p) purified lime, and then 14 pounds or fomewhat lefs of the bone-alh, mixing them together in the manner already defcribed. When my cement is requi¬ red to be white, white fand, white lime, and the whiteft bone-aih are to be chofen. Grey land, and grey bone-afh formed of half-burnt bones, are to be chofen to make the cement grey ; and any other colour of the cement is obtain*- ed, either by choofing coloured fand, or by the admixture of the necefiary quantity of coloured talc in powder, or of coloured, vitreous, or metallic powders, or other, durable co¬ louring ingredients commonly ufed in paint. “ To the end that fuch a water-cement as I have defert- bed may be made as ufeful as it it pofiible in all circum- ftances ; and that no perfon may imagine that my claim and i right under thefe letters-patent may be eluded by divers .va¬ riations, which may be made in the foregoing procefs with¬ out producing any notable deleft in the cement; and to. the end that the principles of this art, as well as the art itfelf, of making my cement, may be gathered from this fpecifica- tion and perpetuated to the public ; I (hall add the follow¬ ing obfervations : “ This my water-cement, whether the coarfe or fine . grained, is applicable in forming artificial ftone, by making alternate layers ol the cement and of flint, hard fl.one,-or brick, (it) “ The vapour which arifes in the flaking of lime contributes greatly to the flaking of thefe pieces which lie in its Way $ and an unneceflary wafte of the liquor is prevented, by applying it to the lime heaped in a pit or in a veffel, which may reftrain the iffue of the vapour, and direft it through the mafs. If more of the liquor be ufed than is neceflary to flake the lime, it will create error in weighing the flaked powder, and will prevent a part of it from palling freely thro® the fieve. The liquid is therefore to be ufed fparingly, and the lime which has efcaped its aftiba is to be fprinkled apart with frelh liquor. # ..... . f (1,) “ When the aggregation of the lumps of lime is thus broken, it is impaired much fooner titan it is in the former ftate, becaufe the air more freely pervades it. ( m) “ Becaufe it confifts of heterogeneous matter or of ill-burnt lime ; which laft. will flake and pafs through the fieve, if the lime be not immediately fifted after the flaking, agreeable to the text. (n) “ Thefe,proportions are intended for a cement made with lharp fand, for incruftation in expofed fituations, where it is neceflary to guard againft the effefts of hot weather and rain. In general, half this quantity of bone-alhes will be found fufficient; 'and although the incruftation in this latter cafe will not harden deeply fo foon, it will be ultimately ftronger, provided the weather be favourable. “ The injuries which lime and mortar fuftain by expofure to the air, before the cement is finally placed in a quiefcenl Hate, are great; and therefore our cement ia the worfe for being long beaten, but the better as it is quickly beaten until the mixture is effefted, and no longer. , (0) “ The quantity of bone-afhes is net to be increafed with that of the limebut it is to be leliened as the expoiure and purpofes of the work will admit. (p) “ Becaufe lefs lime is neceffary, as the fand is coarfer* Stucco. w Let pounds of the aforefaid chofen lime be flaked, —-V- 1' by gradually fprinkling on it, and efpecially on the unfla¬ ked pieces, the cementing liquor,in a clofe (k) clean place. Let the flaked part be immediately (l) fifted through the laft-mentioned fine brafs-wired fieve : Let the lime which paffes be ufed inftantly, or kept in air-tight veflels, and let the part of the lime which does not pafs through the fieve be rejefted (m).—This finer richer part of the lime which pafles through the fieve I call purified lime. “ Let bone-afh be prepared in the ufual manner, by grinding the whiteft burnt bones, but let it be fifted, to.be much finer than the bone-afh commonly fold for making cupels. “ The moft eligible materials for making my cement be¬ ing thus prepared, take 56 pounds of the coarfe fand and 42 pounds of the fine fand; mix them on a large plank of bard wood placed horizontally ; then fpread.the fand fo that it may Hand to the height of fix inches, with a flat furface on the plank; wet it with the cementing liquor; and let any fuperfluous quantity of the liquor, which the fand in the condition deferibed cannot retain, flow away off the plank. To the wetteft fand add 14 pounds of the putrefi¬ ed lime in feveral fucceflive portions, mixing and beating them up together in the mean time with the inftruments ge¬ nerally ufed in making fine mortar : then add 14 pounds of the bone-alh in fucceffive portions, mixing and beating all together. The quicker and the more perfeftly thefe ma¬ terials are mixed and beaten together, and the fooner the cement thus formed is ufed, the better (n) it will be. This I call the water-cement coarje-grained, wlrich.- is to be applied In building, pointing, plaftering, ftnccoing, or other work, as mortar and ftucco now are ; with this difference chiefly, that as this cement is fhorter than mortar or common ftuc¬ co, and dries fooner, it ought to be worked expeditioufly in all cafes; and in ftuccoing, it ought to be laid on by Ai¬ ding the trowel upwards on it; that the materials ufed along with this cement in building, or the ground on which it is to be laid in ftuccoing,- ought to be well wetted with the cementing liquor in the inflant of laying on the cement; and that the cementing liquor is to be ufed when it is ne- ceffary to moiften the cement, or when a liquid is required to facilitate the floating of the cement. « When fuch cement is required to be of a finer texture, S T U [ 45 ] S T U Stucao. b»ckr in moulds of the figure of the intended {lone, and by expofing the mafies fo formed to the open (qJ air to harden. “ When fiich cement is required for water (a) fences, two-thirds of the prefcribed quantity of bone-afhes are to be omitted ; and in the place thereof an equal meafure of pow¬ dered terras is to be ufed ; and if the fand employed be not of the coarfeft fort, more terras mufl. be added, fo that the terras fhall be by weight oiie-fixth part of the weight of the fand. When fuch a cement is required of the fineil grain (s) or in a fluid form, fo that it may be applied with a brufh, flint powder, or the powder ot any quartofe or hard earthy fubftance, may be ufed in the place of fand; but in a quan¬ tity fmaller, as the flint or other powder is finer ; fo that the flint-powder, or other fuch powder, fhall not be more than fix times the weight of the lime, nor lefs than four times its weight. The greater the quantity of lime within thcfe limits, the more will the cement be liable to crack by quick drying, and vice verfa. “ Where fuch fand as I prefer cannot be conveniently procured, or where the fand cannot be conveniently wafhed and forted, that fand which mofl refembles the mixture of coarfe and fine fand above prefcribed, may be ufed as I have dire&ed, provided due attention is paid to the quantity of the lime, which is to be greater (t) as the quantity is finer, and vice verfa. “ Where fand cannot be eafily procured, any durable {lony body, or baked earth grofsly powdered (u), and fort¬ ed nearly to the fizes above prefcribed for fand, may be ufed in the place o! fand, meafure for meafure, but not weight for weight, unlefs fuch grofs powder be as heavy fpecifically as fand. “ Sand may be cleanfed from every fofter, lighter, and lefs durable matter, and from that part of the fand which is too fne, by' various methods preferable (x), in certain circum- ftances, to that which I have deferibed. “ Water may be found naturally free from fixable gas, felenite, or clay ; fuch water may, without any notable in¬ convenience, be ufed in the place of the cementing liquor ; ^ and water approaching this Hate will not require fo much lime as I have ordered to make the cementing liquor ; and a cementing liquor fufficiently ufeful may be made by vari¬ ous methods of mixing lime and water in the deferibed pro¬ portions, or nearly fo. “ When ftone-lime cannot be procured, chalk-lime, or fhell-lime, which bell refembles ftone-lime, in the charac¬ ters above written of lime, may be ufed in the manner de¬ feribed, except that fourteen pounds and a half of chalk- lime will be required in the place of fourteen pounds of ftone-lime. The proportion of lime which I have prefcri¬ bed above may be increafed without inconvenience, when the cement or ftucco is to be applied where it is not liable to dry quickly ; and in the contrary circumftance, this pro¬ portion may be diminifhed ; and the defeft of lime in quan¬ tity or quality may be very advantageoufly fupplied (y), by caufing a confiderable quantity of the cementing liquor to foak into the work, in fucceffive portions, and at diftant intervals of time, fo that the calcareous matter of the cement¬ ing liquor, and the matter attra&ed from the open air, may fill and ftrengthen the work. “ The powder of almoft every well dried or burnt ani¬ mal fubftance may be ufed inftead of bone-alli; and feveral earthy powders, efpecially the micaceous and the metallic ; and the elixated afhes of divers vegetables whofe earth will not burn to lime ; and the afhes of mineral fuel, which are of the calcareous kind, but will not burn to lime, will an- fwer the ends of bone-afii in fome degree. “ The quantity of bone-afli deferibed may be leflened without injuring the cement, in thofe circumftances efpeci. ally which admit the quantity of lime to be leflened, and in thofe wherein the cement is not liable to dry quickly. And the art of remedying the- defeas of lime may be ad^ vantageoufiy pradifed to fupply.the deficiency of bone afli, efpecially in building, and in making artificial ftone with this cement. STUD, M “ the7 muft not be expofed to the rain until they are almoft as ftrong as frefh Portland ftone ; and even then they ought to be flickered from it as much as the circumftances will admit. Thefe ftones may be made very hard and beautiful, with a fmall expence of bone-afh, by foaking them, after they have dried thoroughly and hardened, in the lime hquor, and repeating this procefs twice or thrice, at diftant intervals of time. The like efted was experienced in mcruflations. r (r) ‘‘ In my experiments, mortar made with terras-powder, in the ufual method, does not appear to form fo ftromr a cement for water-fences as that made, according to the fpecification, with coarfe fand; and I fee no morereafon for avoiding the ufe of fand m terras-mortar, than there would*be for rejeding ftone from the embankment. The bone- tlfisMancV11 t US PlaCe arC the dark ^rey °r ^aclc fort‘ * am not yet iuII7 fatisfied about the operation of them in iS) .“The qualities and iifes of fuck fine calcareous, cement are recommended chiefly for the purpofe of fmoothtW and nnilhing the ftronger cruftaceous works,, or for wafhing walls to a lively and uniform colour. For this laft intentiorf tne mixture mult be as thin as new cream,- and laid on brillly with a brufh, in dry weather; and a thick and durable coat •S ° , ipac|e by repeated^wafhuig ; but is not to.be attempted by ufing.^thicker liquor; for the coat made with this laft s pt to kale, whilft the former endures.the weather much longer than any other thin calcareous covering that has been app ied in this way. Fine yellow-ochre is the cheapeft colouring-ingredient fur fuch wafli, when it is required to imitate ijath-ftone, or the warm-white Hones.,,. ^ ^ T | 44 if fea-fand be well wafhed in frefh water, it is as good as any other round fand. “ The cement made with thefe and the proper quantities. of purified, lime and lime-water, are inferior to the be , as the grains of thefe powders are .more peiifhable and brittle than thofe of fand. They will not therefore be employed, unlefs for the fake of evaiion, or for want of fand: in this latter cafe, the finer powder ought to be wafhed miiV* anci tbe ne,xt Pa[agrapb is inferted with a view to evafiorvs, as well as to fuggeft the eafier and cheaper ed to^each ^ be a^°Pte^ in certaia circumftances,. by artifts who unduftartd the principles which I endeavour- the^thod nf8 Pra ^ order to take poffeffion of the place offered him by the ma- giftrates. The year following he opened a fchool, which became famous, and by his means obtained of Maximilian II. the title of an univerfity in 1566. He was very well {killed in polite literature, wrote Latin with great purity, and was a good teacher. His talents were not confined to the fchool ; for he was frequently intruded with deputations iu Germany and foreign countries, and difeharged thefe em¬ ployments with great honour and diligence. He fhowed extreme charity to the refugees on account of religion : He not only laboured to afiift them by his advice and recom¬ mendations ; but he even impoverifhed himfelf for them. He died in his 8 2d year, after he had been for fome time blind. He publiftied many books ; the principal of which are, I. Partitiones DialeSica. 2. De Educatione Principum. 3. De Nobilitate yinghcana. 4' Lingu* Latinae re/olvends Ratio. 5. Excellent Notes on Ariftotle’s and Hermogenes’s Rhetoric, &c. Fie ought not to be confounded with yohn Sturmius, a native of Mechlin, and phyfician and profeffor of mathema¬ tics at Louvain, who alfo wrote feveral works. STURNUS, the Starling ; agenus of birds belonging to the order of pajferes. The beak is Tubulated, depreffed* and fomewhat blunt; the fiaperior mandible is entire, and fomewhat open at the edges ; the noftrils are marginated above ; and the tongue is fharp and emarginated. T. here are 15 fpec»«:s according to Dr Latham ; the vulgaris, capenfis, ludovicianus, militaris, cellaris, carunculatus, gallinaceus, fericeus, viridis, olivaceus, moritanicus, loyca, dauuricus, junceti, and mexicanus. The vulgaris, or common ftarling, is the only fpecies ©f the fturnus that is indigenous. The weight of the male of this fpecies is about three ounces; that of the female rather lefs. The length is eight inches three quarters: Lathst the bill is brown or yellow, but in old birds generally yellow. The whole plumageisblack,very refplendent, with changeable 0 ’ blue, purple, and copper: each feather marked with a pale yellow fpot. The leffer coverts are edged with yellow, and {lightly gloffed with green. The quill-feathers and tail dulky : the former edged with yellow on the exterior fide ; the lalt with dirty white. The legs of a reddifir brown. The ftare breeds in hollow trees, eaves of houfes, towers, ruins, cliffs, and often in high rocks over the fea, fuch as that of the ifle of Wight. It lays four or five eggs, of a paie- greenifh afh-colour ; and makes its neft of ftraw, fmall fibres of roots, and the like. In winter, flares affemble in vaft flocks ; they colledf in myriads in the fens of Lincoln {hire, and do great damage to the {en-men, by roofling on the reeds, and breaking them down by their weight; for reeds are the thatch of the country, and are laid up in harveft: with great care. Thefe birds feed on worms and infedfs } and it is faid that they will get into pigeon-houfes, for the fake of fucking the eggs. Their flelh is fo hitter as to be fcarce eatable. They are fond of following oxen and other large cattle as they feed in the meadows, attradled, it is faid, by the iufe&s which flutter round them, or by thofe, perhaps, 5 which Sty*, Style. ' iufffin'j m. Hi- lory of Ihds, 'o). iii. STY which fwarm in their clung, or in meadows From this habit is derived the German name Hinder Staren. J They arc alfo accufed of feeding on the carcafes that are expofed on gibbets ; but it is probably in fearch only of infects. They live feven or eight years, or even longer, in the domeftic ftate. The wild ones cannot be decoyed by the call, becaufe they regard not the feream of the owl. A method has been difeovered of taking entire families, by fix¬ ing to the walls and the trees where they' lodge pots of earthen ware of a convenient form, which the birds often prefer to place their nells in. Many are alfo caught by the gin and draw-net. In fome parts of Italy' it is common to employ tame weafels to drag them out of their nefls, or rather their holes; for the artifice of man confifts in em¬ ploying one enflaved race to extend his dominion over the reft. The ftare, it is faid, can be taught to fpeak either French, German, Latin, Greek, &c. and to pronounce phrafes of fome length. Its pliant throat accommodates itfelf to every infleftion and every accent. It can readily articulate the letter R, and acquires a fort of warbling which is much fu- perior to its native fong. This bird is fpread through an extenfive range in the ancient continent. It is found in Sweden, Germany, France, Italy, the Ifle of Malta, the Cape of Good Hope, and is everywhere nearly the fame ; whereas thofe American birds which have been called flares, prefent a great diverfity of appearance. STYE, or Stythe, in the eye. See Crithe. STYLE, a word of various fignincations, originally de¬ duced from^/?y/or, a kind ot bodkin wherewith the ancients wrote on plates of lead, or on wax, &c. and which is ftill uled to write on ivory-leaves and paper prepared for that purpofe, &c. Style, in dialling, denotes the gnomon or cock of a dial railed on the plane thereof to project a fhadow. Style, in botany. See Botany, Seft. iv. p. 434. Style, in language, is the peculiar manner in which a man exprtffes his conceptions. It is a picture of the ideas which rife in his mind, and of the order in which they are there produced. T. he qualities of a good ftyle may be ranked under two heads ; perfpicuity and ornament. It will readily be ad- Plati* nutted, that perfpicuity ought to be efientially connected with every kind of writing ; and to attain it, attention muft be paid, firft to fingle words and phrafes, and then to the conftrudtian of fentences. When confidered with refpedl to words and phrafes, it requires thefe three qualities ; purity, propriety, and precifion. When confidered with regard to fentences, it requires a clear arrangement of the words and unity in the LHe ; to which, if ftrength and harmony be added, the ftyle will become ornamented. One of the moft important diredirrns to be obferved by him who vvifhes to form a good ftyle, is to acquire clear and precife ideas on the fubjeA concerning which he is to write or fpeak. 1 o this muft be added frequency of compo- frtion, and an acquaintance with the ftyle of the belt authors. A fervile imitation, however, of any author is carefully to be avoided ; for he who copies, can hardly avoid copying faults as well as beauties. A ftyle cannot be proper unlefs it be adapted to the fubjedt, and likewife to the capacity of uisr hearers, if we are to fpeak in public. A fimple, clear, and unadorned ftyle, fuch as that of Swift, is fitted for in¬ tricate d.fquifition ; a ftyle elegant as Addifon’s, or impe¬ tuous like Johnfon’s, is moft proper for fixing the at- tentmn on truths, which, though known, are too much B^,e1 c ’ mull not be inattentive to the ornaments ^ * "j1 * -l, WC W1^ that our labours fhould be read and ad¬ mired : but he is a contemptible writer, who looks not r 47.] STY in general, beyond the drefs of language, who lays not the chief ftrefs upon his matter, and who does not regard ornament as a fecondary and inferior recommendation. For further ob- fervations on the different kinds of ftyle, fee Oratory, n° 99, &c. Style, in jurifprudence, the particular form or man¬ ner of proceeding in each court of jurifditlion, agreeable to the rules and orders eftabliihed therein : thus we fay, the flyle of the court of Rome, of chancery, of parliament, of the privy-council, &c. Style, in mufic, denotes a peculiar manner of finging* playing, or compofing ; being properly the manner that each perfon has of playing, finging, or teaching ; which is very different both in refpecl of different geniufes, of coun. tries, nations, and of the different matters, places, times, fubjedts, paffions, expreffions, &c. Thus we fay, the ftyle of Paleftrina, of Lully, of Corelli, of Handel, &c. ; the ftyle of the Italians, French, Spaniards, &c. Old Srrin, the Julian method of computing time, as the New Sms is the Gregorian method of computation. See Kalendar. STYLEPHORLTS chordatits, a genus of fifties belong¬ ing to the order of afodes. This very curious genus was ccccx'xx^vt’ difeovered by Dr Shaw, who read a defcription oi it be¬ fore the Linnsean Society in the year 17,88. The eyes are fixed on cylindrical pillars which lie clofe together. The roilmm, or narrow part which is terminated by the mouth, is conne&ed to the back part of the head by a flexible lea¬ thery duplicature, which permits it either to be extended in fuch a manner that the mouth points diredtly upwards, or to fall back fo as to be received into a fort of cafe, formed by the upper part of the head. There are three pairs of branchiae lituate under the throat. The pe&oral fins are Tranfac- Imall; the dorfal fin runs from the head to within about au/''”x <’/'/> inch and a half of the tail ; the caudal fin is fhoriy and is ^ furnifhed with five remarkable fpines. The body is extreme- ^’ V°A" ** ly long, and compreffed very much, and gradually dimi. nifties as it approaches the tail, which terminates in a procefs or flung of an enormous length, and finifties in a very fine point. This firing, or caudal procefs, feems to be flrength- ened throughout its whole length, or at lead as far as the eye can trace it, by a fort of double fibre or internal part. The ftylephorus chordatus is a native of the Weft Indian Sea. It was taken between the iflands of Cuba and Martini- co, near a fmall duller of little iflands about nine leagues from fhore, and was feen fwimming near the furface. The whole length of this uncommon animal from the head to the extremity of the caudal procefs is about thirty-two inches, of which the procefs itfelf meafures twenty-two. STYLET, a fmall dangerous kind of poniard which rnay he concealed in the hand, chiefly ufed in treacherous affaflinations. I he blade is ufually triangular, and fo fmall that the wound it makes is almoft imperceptible. STYL.ITES, pillar sa iNTs, in eecldxaftical hiftory, an appellation given to a kind of folitaries, who flood motionlefs. upon the tops of pillars, raifed for this exercife of their pa¬ tience, and remained there for feveral years, amidft the admi*. ration and applanfe of the ftupid populace. Of thefe we find feveral mentioned in ancient writers, and even as low as th@ twelfth century, when they were totally fuppreffed. The founder of the order was St Simeon Stylites-, a fa¬ mous anchoret in the fifth century, who firft took up his abode on a column fix cubits high * then on a fecond of twelve cubits, a third of twenty-two,, a fourth, of thirty-fix, and on another of forty cubits, where he thus paffed thirty- feven years of his life. The tops of thefe columns were only three feet in diameter, and were defended by a rail that reached almofl to the girdle, femewhat refembling a pulgitL loidej II Styrax. STY pulpit. There was no lying down in it. _ . devout people of the Eaft, imitate this extraordinary kind or life to this day. STYLOCERALOIDES, name6 0f different STYLO Gloss us, ( mufcles in ■ the human ' Sino-lfyoidaut, f bGdy. See Table of the \ Mufcles under Anatomy. STYLO IDES, J J STYLOS ANTHES, in botany: A genus of the dria order, belonging to the diadelphia'c\a.\s> of plants ; and in the natural method ranking under the 3 2d order, Papili- onacett. The calyx is tubulated, vtry long, having the co¬ rolla attached to it. The legumen or pod biarticulated and hooked. Of this there are two fpecies, both itatives of Ja¬ maica, viz. f. Procumbent, the hedyfarum procumbent of Lin- nseus; a figure of which may be feen in Sloane’s Natural Hiftory of Jamaica. 2. V'tfcofa, xhttrifo/ium 2. of Browne; -a figure of which is alfo given by Sloane. STYPTIC, in pharmacy, a medicine which by its aftrin* gency ftops haemoirhagies, See. ‘See'FHARMACY, n® 547- STYRAX, the storax-tree, in botany : A genus of plants belonging to the clafs of decandr'ta, and to the order of monogynia ; and in the natural fyftem ranging under the 18th order, bicornet. ' Linnaeus only mentions one fpecies of this genus, the Jlyrax-oJJicinale 4 but Aiton, in his Hortus Keivenfu, has added two more ; namely, the grande folium and / Uvigatum;; and we believe a fourth may now be added, the fid rax benzoin. The officinale ufually rifes above twenty feet in height; it • -fends off many ftrong branches, which are covered with a roughilh bark of a grey colour: the leaves are broad, elliptical, entire, fomewhat pointed, on the upper furface fmooth, and of a light green colour, on the under furface covered with a whitith down ; "They are placed alternately, and Hand upon fFtodvlllt'j fhort footllalks: the flowers are large, white, and difpofed Medial in clufters upon fhort peduncles, which terminate the Botany, branches: the corolla is monopetalous, funnel-fhaped, and ®ol. ii. divided at the limb into five lance-fhaped fegments : the fila¬ ments are ten, placed in a regular circle, and feem to adhere towards the bafe: the anther* are ereft and oblong: the germen is oval, and fupports a flender ftyle, with a fimple r ftigma: the fruit is a pulpy pericarpium, which contains one e or two nuts of an oval compreffed figure. The refinous drug called flora* iflues in a fluid ftate from incifions made in the trunk or branches of the tree. Two forts of this refin have been commonly diftinguifhed in the {hops. 1. Storax in the tear : is fcarcely, if ever, found in feparate tears, but in maffes, fometimes compofed of whi- tifli and pale reddilh brown tears, and fometimes of an uniform reddifh yellow or browniflr appearance ; unttuous and foft like wax, and free from vifiblc impurities. This is fuppofed to be the fort which the ancients received from Pamphylia in reeds or canes, and which was thence named calamita. 2. Common flora*: in large mafles, confiderably lighter and lefs compaft than the former, and having a large ad¬ mixture of woody matter like faw-duft. This appears to be the kind intended by the London college, as they di- reft their ftyrax calamita to be purified, for medicinal ufe, by foftening it with boiling water, and prefling it out from the feces betwixt warm iron plates; a procefs which the firft fort does not ftand in need of. And indeed there is rardy any other than this impure rtorax to be met with in the (hops. Storax, with feme of the ancients, was a familiar remedy as a refolvent, and particularly ufed in catarrhal complaints, -coughs, afthmay, menftrual obftrutb’ons, &c« and from its Stym; Plate 1 Lcuiis's Materia Medico, wol. it. t 48 ] ! S T Y The faquirs, or affinity to the ballams it was alfo preferibed in ulceration^ ■ ■ of the lungs, and other ftates of pulmonary conlumption. And out pharmacopoeias formerly diredled the/>/'/«/<* efly race', but this odoriferous drug has now no place in any of the officinal compounds ; and though a medicine which might feem to promife feme efficacy in nervous debilities, yet by modern pradlitioners it is almoft totally difregarded. T\itflyrax benzoin is deferibed by Dr Dryander in the Philofophical Tran factions for I7^7» P* ^c’ . ^ hasCCCCI,Ba' been characterized by oblong acuminated leaves, which are downy underneath, and nearly of the length of the racemi. The botanical charadler of this tree was miftaken by modern botanitls till Dr Dryander afeertained it to be altyrax. Ben¬ zoin was long fuppofed to be the produce of a fpecies of laurus. Linnaeus dete&ed this error : but he committed ano¬ ther; for he tells us, that it is furnilhed by a flirub which, in the country where it grows, is called croton bezoe ; and after¬ wards, m his Supplementum Plantarum, defenbes the fame plant a fecond time, under the name of terminalia benzoin. This tree, which is a native of Sumatra, is deemed in fix years of fufficient age for affording the benzoin, or when its trunk acquires about feven or eight inches in diametei ; the bark is then cut through longitudinally, or fomewhat oblique¬ ly, at the origin of the principal lower branches, from which the drug exudes in a liquid ftate, and by expofure to the fun and air foon concretes, when it is feraped off from the bark with a knife or chifel. The quantity of benzoin which one tree affords never exceeds three pounds, nor are the trees found to fuftain the effe&s of thefe annual incifions longer than ten or twelve years. The benzoin which iffues firft from the wounded bark is the pureft, being foft, ex- tremely fragrant, .and very white ; that which is lefs efteem- ed is of a brownifh colour, very hard, and mixed with va¬ rious impurities, which it acquires during its long continu¬ ance upon the trees. Efchelfkron diftinguilhes benzoin into three kinds, viz. camayan poeti, or white benjamin, which, upon being melted in a bladder by the heat of the fun, appears marked with red ftreaks or veins. Camayan hamatta is lefs white than the former, and often fpotted with white circles, called eyes, from the number of which it* goodnefs is eftimated : it likewife melts by the heat of the fun. Camayan itam, or black benjamin, which requires to be melted in hot water for its prefervation in bladders. In Arabia, Perfia, and other parts pf the Eaft, the coarfer kinds of benjamin are confumedffor fumigating and perfuming the temples, and for deftroying infe&s. The benzoin which we find here in the {hops is in large brittle maffes, compofed partly of white, partly of yeilowifh or light brown, and often alfo of darker coloured pieces: that which is cleareft, and contains the moft white matter, called by authors benzoe amygdaloides, is accounted the beft. This refin has very little tafte, impreffing on the palate only a flight fweetnefs : its fmell, efpecially when rubbed or heated, is extremely fragrant and agreeable. It totally diffolves in rectified fpirit, (the impurities excepted, which are generally' in a very fmall quantity), into a deep yellowifh red liquor, and in this ftate difeovers a degree of warmth and pungency, as well as fweetnefs. It imparts, by digeftion, to water alio a confiderable (hare of its fragrance, and a flight pungency: the filtered liquor, gently exhaled, leaves not a reiinous or mucilaginous extraft, but a cryftalline matter, feemingly of a faline nature, amounting to one-centh or one eighth of the weight of the benzoin. Expofed to the fire in proper veffels, it yields a quantity of a white faline concrete, called floret benzoesi- of an acidulous tafte and grateful odour, foluble in re&ified fpirit, and in water by die affiftance of heat. 5 The STY ftyrp*, -Styx, 'Mf. nf ■ K, Se. ty of E- iburgt, 4. ii. The pvlHetpal ufe of thl? fragrant refm U in perfumes, and as a cofmetic ; for which Jaft purpofe, a foiution oi it in fpirit of wine is mixed with fo much water as is fuflicient to render it milky, as twenty times its quantity or more. It proraifes, however, to be applicable to other ufes, and to approach in virtue, ns in fragrance, to ftorax and baliam of Tolu It is faid to be of great fervice in diforders of the bread, for refolving obflrudtions of the pulmonary veffels, and promoting expeftoration : in which intentions the flowers are fometimes given, from three or four grains to fifteen. The white powder, precipitated by water from folurions of the benzoin in {pirit, has been employed by fome as limilar and fuperior to the flowers, but apoears to be little other than the pure benzoin in fubftance : it is not the ialine. but the refinous matter of the benzoin, that is rnofl difpofed to be precipitated from fpirit by water. The flowers, fnuffed- up the nofe, are faid to be a powerful er- rhine. Liquid ftorax is a refinous juice obtained from a tree call¬ ed by Linnaeus /iquidambar jlyraafiuc, a native of Virginia and Mexico, and lately naturalized in this country. The juice called liquidambar is faid to exude from incifions made in the trunk of this tree, and the liquid ftorax to be obtained by boiling the bark or branches in water. Two forts of liquid Itoi^ax an; diftinguifhed by authors : one, the purer part of the rtfinous matter that rifes to the furface in boiling, fe- parated by a ftrainer, of the confiftence of honey, tenacious like turpentine, of a reddifti or afh brown colour, moderately tranfparent, ol an acrid umPcuous tafte, and a fragrant fmell, faintly tefembling that of the folid ftorax, but fomewhat difagreeable : the other, the more impure part, which re¬ mains on the ftiainer, is not tranfparent, in fmell and tafte is much weaker, and contains a coniiderable proportion eft the fubftance of the bark. What is moft commonly met with und?r this name in the fhops is of a weak fmell and a grey colour, and is fuppofed to be an artificial cornpofition. Liquid ftorax has been employed chiefly in external ap¬ plications. Among us, it is at prefent almoil wholly in tlifufe. ST\ X (fab. hift.), a celebrated river of hell, round which r 49 3 SUB were conveyed in a boat acrofs the lake Acherufia} and StiuM* that Charon was a boatman who had long officiated in that 11 fervice.' The learned Dr Blackwell fays, in his life of Hc>,SuW*via! mer, that, in the old Egyptian language, Charoni fignified “ ferryman.” SUABIA, a circle of Germany, bounded on the north by the circle of Franconia and that of the Lower Rhine ; on the weft by the circle of the Lower Rhine and Alface ; on the fouth by Switzerland ; and on the Gaft by the circle of Bavaria. Of all the circles of the empire, Suabia is the moft divided ; it contains four ecclefiaftic and thirteen lay principalities, nineteen independent prelacies and abbeys, twenty-fix earldoms and lordfhips, and thirty-one free cities. The prime directors of the circle, as they are termed, are the bifiiop of Con fiance and the duke of Wirtemberg. The duke has the iole direction of all that relates to war. The mixture of the various forms of government and re- ' lioious fedls ; the opprcffion exercifed by the great on the poor ; the game conftantly played by the emperor, who pofTeffes many pieces of detached country in Suabia, which depend not on the circle, and can, in confequence of his pri¬ vileges as archduke of Auftria, extend his pofieffions in it by various ways; are circumftances (fays baron Riefbeckj which give the cultivation of the country, and the chanrfter of the inhabitants, a molt extraordinary caft. In feveral of^^T/ the poll towns where you flop, you fee the higheft degree Germany, of cultivation in the midft of the moft lavage wildnefs ; a *• great degree of knowledge and polifh of manners, mixed with the groffeft ignorance and fuperftition ; traces of liber¬ ty, under the deepeft oppreffion ; national pride, together v iththe contempt and negleft of the native countiy ; in fhort, all the focial qualities in linking contrail and oppofi- tion to each other. Thofe parts of Suabia which belong to the great potentates, fuch as Wirtemberg, A uftria, and Baden, are certainly the moft improved The whole of Suabja may comprehend about nine hundred German fquare miles, and two millions of people. More than half of thefe are fubjedts of the three above mentioned princes, though they are not proprietors of near one half of the lands. SCARES (Francis), a Jefuit, was born in Granada on it flows nine times. The gods held the waters of the Styx in The yth of January 1548. He was a profefibr of theolo-y luck veneration, that to fwear by them was reckoned an oath at Alcala, Salamanca, Rome, and Coimbra in Portugal, altogether inviolable. If any of the gods had perjured He died at Lifbon in 1617 with the greateft refi rnation; tliernielves, Jupiter obliged them to drink the waters of the “ I never thought (faid he) that it was fo eafy to die.’* Styx, which hilled them for one whole year into a femelefs His memory was aftonifliimr, he could repeat the whole of ilupidity, for the nine following jears they were deprived of his voluminous works by Heart. His writings lift 23 folio the ambrofia and the neftar of the gods, and after the ex¬ piation of the years of their puuifhment, they were reftored to the aflembly of the deities, and to all their original privileges. It is faid that this veneration was fhown to the Styx, be- caulc it received its name from the nymph Styx, who with hei three daughters affiiled Jupiter in his war againft the Titans. * & Styx was a river which it was neceffary for departed fnades to pafs before they could enter the infernal regions; and it was the office of Charon to ferry them over in a boat which was kept for that purpofe. The ghofts of thofe who had not been honoured with the rites of fepulture were obliged to wander an hundred years before Charon could admit them into his boat to convey them before the judges of Hades. What could have given rife to this fable of Charon and his boat, it is not very material to inquire. Mythological writers have faid, that'the Greeks learned it from the Egyptians, which is indeed probable enough ; that the Egyptians framed both this, and fome other fables re ating to tne. dead, from certain cuftoms peculiar to their country ; that in particular there was, not far from Mem- u 3 buryin£'Place> t0 whlch th? ^ad bodies Vox-, XVIII. part I. volumes, and are nioftly on theological and moral fubjedls. Ilis Treatife of Laws has been reprinted in this country. His Defence of the Catholic Faith againil the Errors of England was written at the requell of pope Paul V. This book was publicly burnt at London by order of James I. When Snares heard it, he is faid to have exclaimed, O that I too could feal with my blood the truths which I have defended with my pen !” SUBAH, the general name of the viceroyftiips, or great¬ er governments, into which the Mogul empire was divided, confifting of feveral provinces. The jimfdidlion of a fubah- dar, the fame as fubahfhip, fubaedaree, or nizamut. SUBAHDAR, the viceroy, lord-lieutenant, or governor, holding a fubah ; the fame as nabob or nazim. Alfo the black commander of a company of Seapoys. SUBALTERN, a fubordinate officer, or one who dif- charges his poll under the command and fubjecl to the di¬ rection of another; fuch are lieutenants, fub lieutenants, cornets, and enfigns, who ferve under the captain. SUBCLAVIAN, in anatomy, is applied, to any thing under the arm-pit or fhoulder, whether artery, nerve, vein, or mufcle. G SUB- SUB . £ 50 Sub deacon SUB-DE \CON, an Inferior miniller, w!io anciently at- I! . tended at the altar, prepared the facred veffels, delivered SUb)kUlU* them to the deacons in time of divine fervice, attended the ^ doors of the church during communion-fervice, went on the the bifhop’s embaffies with his letters or meffages to foreign churches, and was inverted with the firft of the holy orders. They were fo fubordinate to the fuperior rulers of the church, that, by a canon of the council of Laodicea, they were for¬ bidden to fit in the prefence of a deacon without his leave. According to the canons, a perfon muft be twenty-two years of age to be promoted to the order of fubdeacon. See Deacon. SUBDOMINANT, in mufic, a name given by M. Rameau to the fourth note of the tone, which of confe- quence is the fame interval from the tonic when defcending as the dominant in riling. This denomination arifes from the affinity which this author finds by inverfion between the minor mode of the fubdominant and the major mode of the tonic. SUBDUPLE ratio, is when any number or quantity is contained in another twice. Thus 3 is faid to be fubdu- ple of 6, as 6 is duple of 3. See Ratio. SUBDUPLICATE ratio of any two quantities, is the ratio of their fquare roots. SUBER, the cork-tree, in botany. See Qjjercus. SUBJECT, a perfon under the rule and dominion of a fovereign prince or Hate. Subject is alfo ufed for the matter of an art or fcience, or that which it confiders, or whereon it is employed : thus the human body is the fubjeft of,medicine. SUBINFEUDATION, was where the inferior lords, in imitation of their fuperiors, began to carve out and grant to others minuter eftates than their own, to be held of them- felves ; and were fo proceeding downwards in irifinitum, till the fuperior lords obferved, that by this method of fubin- feudation they loft all their feodal profits, of wardffiips, marriages, and efcheats, which fell into the hands of thefe mefne or middle lords, who were the immediate fuperiors of HlfriMonc's the terre-tenant, or him who occupied the land. This oc- Cammcn- cafioned the flat, of Weftm. 3. or quia emptores, 18 Edw. I. iury, vol.ii, to be made ; which direfts, chat, upon all fales or feoffments of lands, the leoffee ffiall hold the fame, not of his immediate feoffer, but of the chief lord of the fee o! whom fuch feof- fer himfelf held it. And from hence it is held, that all manors exifting at this day mull have exifted by immemorial prefcription ; or at leaft ever fiince the 18 Edw. I. when the flatHte of quia emptores was made. SUBI TO, in the Italian mufic, is ufed to fignify that a thing is to be performed quickly and hartily : thus we meet with vo/ti fulito, turn over the leaf quickly. SUBJUNCTIVE, in grammar. See Grammar. SUBLIMA TE, a chemical preparation, confitfting of quickfilver united with the marine acid. See Chemistry- Index. SUBLIMATION, in chemiftry, the condenfing and collefting, in a folid form, by means of veffels aptly conftrudt- ed, the fumes of bodies raifed from them by the application of a proper heat. See Chemistry, n° 581. SUBLIME, or Sublimity. See the article Grandeur and Sublimity SUBLINGUAL artery. See Anatomy. Svblingual Glands, in anatomy, two glands under the tongue, placed one on each fide thereof. SUBMULTIPLE, in geometry, &c. A fubmultiple number, or quantity, is that which is contained a certain number ot times in another, and which, therefore, repeated a certain number of times* becomes exa£Uy equal thereto. ] S U B _ Thus 3 is a fubmultiple of 21. In which fenfe a fubmulti* ST multi" pie coincides with an aliquot part. Plc Submultiple Ratio, is that between the quantity con- StlWJrlr<> tained and the quantity containing. Thus the ratio of 3 - tion.' to 21 is fubmultiple. In both cafes fubmultiple is the re--y—, verfe of multiple : 21, e. gr. being a multiple of 3, and the ratio of 21 to 3 a multiple ratio. SUBORDINARIES. See Heraldry, Chap. III. Seft. II. page 454. SUBORDINATION, a relative term, exprefiing an inferiority betwixt one perfon and another. SUBORNATION, in law, a fecret, underhand, pre¬ paring, inftru&ing, orbringing in a falfe witnefs ; and from htxvze fubornation of perjury is the preparing or corrupt allu¬ ring to perjury. The punifhment for this crime'was formerly death, then banifhment or cutting out the tongue, afterwards forfeiture of goods ; and it is now a fine and imprifonment, and never more to be received as evidence. The ftatute 2 Geo* II. c. 23. fuperadded a power for the court to order the of¬ fender to be fent to the houfe of corre&ion for a term not exceeding feven years, or be tranfported for the fame period. SUBPCENA, in law, a writ wheieby common perfons are called into chancery, in fuch cafes where the common law hath provided no ordinary remedy ; and the name of it proceeds from the words therein, which charge the party called to appear at the day and place affigned, fub poena cen¬ tum librarum. See. The fubpoena is the leading procefs in the courts of equity ; and by ftatute, when a bill is filed againft any perfon, procefsxof fubpoena (hall be taken out to oblige the defendant to appear and anfwer the bill, &c. Subpoena ad tejlificandum, a writ or procefs to bring in witneftes to give their teftimony. If a witnefs on being ferved with this procefs does not appear, the court will ifiue an attachment againft him ; or a party, plaintiff or defendant, injured by his non-attendance, may maintain an adftion againft the witnefs. See Blachjl. Com. Vol.III.p. 369. Subpoena in Equity, a procefs in equity, calling on a defendant to appear and anfwer to the complainant’s bill. See ftatute 9th Geo. II. c. 29. which ena£ls, that where the party cannot be found to be ferved with a fubpoena, and abfeonds (as believed) to avoid being ferved, a day fhali be appointed him to appear to the hill of the plaintiff; which is to be inferted in the London Gazette, read in the pariftr-church where the defendant laft lived, and fixed up at the Royal Exchange : and if the defendant doth not appear upon that day, the bill ihall be taken pro confejfo. SUBREPTI TIOUS, a term apulied to a letter, licence, patent, or other aft, fraudulently obtained of a fuperior, by concealing fome truth which, had it been known, would have prevented the conceffion or grant. SUBROGATION, or Surrogation, in the Civil Law, the aft of fubftituting a perfon in the place, and in- titling him to the rights, of another. In its general fenfe, iub- rogation implies a fucceffion of any kind, whether of a per¬ fon to a perfon, or of a perfon to a thing. There are two kinds of fubrogation *. the one convention¬ al, the other legal. Conventional fubrogation is a contraft whereby a creditor transfers his debt, with all appurtenance* thereof, to the profit of a third perfon. Legal fubroga¬ tion is that which the law makes in favour of a perlon who difeharges an antecedent creditor; in which cafe there is a legal tranflation of all rights of the ancient creditor to the perfon of the new one. SUBSCPvIPTION, in general, fignifies the frgnature put at the bottom of a letter, writing, or inftrument. In commerce, it is ufed for the (hare or intereft which, particular perfons take in a public flock or a trading com- 8 pany, SUB r 5t ] sue nbularia. &c- are to>*the dunum (Caeiar),is now called Sojjfons. T1 ! 1 tVt V!.0!* /~\ t O f" O £» *v-\ i.'M 1 •. 1 / l rm *• V» /■* iS r~\ r> »*» _ Sue?, SUET, Sevum, or Sebum, in anatomy, the folid fat found in feveral animals, as fheep. oxen, &c. but not in the human fpecies. See the article Fat.—It is of the fevum that tal¬ low is made. SUETONIUS tranquillus (Cains), a famous Latin hillorian, was born at Rome, and became iecretary to the emperor Adrian, about the i i8th year or the Chritlian era; but that poll was taken from him three years after, when feveral perfons fell under that prince’s difpleafure for not fhowiny the emprefs Sabina all the refpect fhe deferved. During his difgrace he compofed many works, which are loft. fhofe now extant are his Hillory of the XII firft Emperors, and a part of his Treatife of the llluftrious Grammarians and Rhetoricians. Pliny the Younger was his intimate friend, and perfuaded him to publifh his books. His Hiltpry of the XI i Roman Emperors has been much commended by moil of our polite fcholars. He reprefents, in a continued feries of curious and interefting particulars, without any digrefllons or reflections, the aftions of the emperors, without omitting their vices, which he expofes with all their deformity, and with the fame freedom men¬ tions the good qualities of the very fame peifons ; but the horrid dififolutenefs and obfcene adfims he relates of Tibe¬ rius, Caligula, Nero, &c. have made fome fay, that he wrote the lives pf the emperors with the fame licentioufnefs with which they lived. The edition of this hiflory procured by Graevius at Utrecht in 1672, with the excellent Commen¬ taries of Torrentius and Caiaubop, and the notes of fame other learned critics, is much efteemed. Burmau alfo pu- blifhed an edition in two vols gto with notes. SUEVI, the Catti or Chatti of Casfar (Strabo), placed on the Rhine : the reafon of Caelar’s calling them thus does number of 28 at a time, might be attacked without oopo- fition ; for the fhips themfelves are incapable of refiftance, none having any other artillery than four rulty fwivels. Suez has always been, notwithftanding its local difadvan* tages, a place of great trade, on account of its geographi¬ cal htuation. It was by the gulph of Suez that the com¬ modities of India were formerly conveyed to Europe, till the diicovery of the paffage by the Cape of Good Hope converted that trade into a new channel. As the ifthmus of Suez, which feparates the Red Sea from the Mediterra¬ nean, is not more than 57 miles, it has been frequently' pro- pofed to join thele two feas together by a canal. As there are no mountains nor remarkable inequalities of furface, this plan would at firft view apoear eafy to be executed. But though the difference of levels would not prevent a junction, the great difficulty arifes from the nature of the corrcfponding coails of the Mediterranean and the Red Sea, which are of a low an I Tandy foil, where the waters form lakes, fhoals, and moraffes, fu that veffels cannot ap¬ proach within a coniiderable diftance. It will therefore be found fcarcely poflible to dig a permanent canal amid thefc fhi:ting fands : not to mention, that the Ihore is deftitute of harbours, which muff be entirely the work of art. The country behdes has not a drop of frefh water, and to fup- ply the inhabitants, it muff be brought as far as from the Nile. I he beft and only method therefore of .effecting this junction, is that which has been already fuccefsfully prac- tifed at different times; which is, by making the river itfelf the medium of communication, for which the ground is per- fedtly well calculated ; for Mount Mokattam fuddenly ter¬ minating in the latitude of Cairo, forms only a low and fe- micircular mound, round which is a continued plain from zzrsJztcooMmb,y diaant from r psr.mr I he ancients, who early underflood the advantage to be de¬ rived Suevi (Tacitus), a common name of the people fitua- ted between the Elbe and the Viftula, diftinguifhed other- whe by particular names ; as in Ptolemy, Sucvt Avgeii, Sue- nn bemones. SUEVUS (anc. geog.), a river of Germany, thought to be the fame with the Viadrus or Oder, emptying itfek at three mouths into the Baltic, the middlemoit of which is called Sw'.ne or Swine; which laft comes nearer the name Suevus. SUEZ, a fmall fea-port town, fituated near the northern extremity of the Red Sea, and about 30 hours journey eaft from Cairo. 'I he country around it is a Tandy plain, with¬ out the imalleft fpot of verdure. The only water which lived fiom this fituation, adopted the idea of joining the two feas by a canal connedled with the river. Strabo * obfei ves, * m, xvi^ that this \\'as firll executed under Setoftris, who reigned about the time of the Trojan war ; and this work was fo con- iiderable as to occahon it to be remarked, “ that it was loo cubits (or 170 feet) wide, and deep enough for large vef- fels.1 * * * 5’ After the CUeeks conquered the country, it was re- ilored by the Ptolemies, and again renewed by Trajan. la' fhoit, even the .Arabs themfelves followed thefe examples, “In the time of Omar ebnel-Kattab (lays the hifloriaa E Makin), the cities of Mecca and Medina fuffering from famine, the Calif ordered Amrou governor of Egypt to cut a canal from the Nile to Kolzoum, that the contributions of can be drunk is brought from El Naba nr tVn f • * a canat from the Nile to Kolzoum, that the contributions of the diilaiice of th,M IHTu^dTt iffotclift ^ 1 . J j “ au 10 ivj uidGKlin that without a mixture of rum it is infupportable to Euro- peans. ^ I he town itfelf is a colle&ion of miferabie ruins, the khans Dung the only folid buildings; yet from March till June, the feafon when the Jidda and Yambo fleet arrives the town becomes crowded; but after its departure nobody remains except the governor, who is a Mamlouk, l2 or perions wko form his lioufehold, and tlie garrifon. The fortrefs „ a defer,celel. heap of ruins, which the Arabs com !'nd,gaSap If’ becaul!: 11 contains fix brafs four pounders, Z T ,t g!!rTS' afide when thev tire. i he haibour is a wretchwl .1. _ way, I his canal is the fame which runs at prefent to Cairo, and lofes itielf in the country to the north-eaft of Berket-el- liadjj or the Lake of the Pilgrims. 1 he place on the well coatt of the gulph of Suez, where the children of iirael are fuppofedto have entered it, is called Aadeu, about fix miles to 'the north of Cape Korondel, on the other fide of the gulph, as we are informed in a letter tiom the ingenious Edward Wortley Montague, F. R. S* to Dr Wat Ion, containing an account of his journey from Cairo to the Written Mountains in the defert of Sinai, The / "Suez Suffolk. S U F C 54 The Britifh nation, we believe, never attempted to carry 1 for Suez, laden with piece-goods of Bengal and coaft ma nufaftures. The command of the vefiels was committed to Captain Greig, a meritorious feaman ; and the management of the goods was entrufted to Mr Straw, a gentleman di- ftinguifhed for his mercantile knowledge. The fale turned out to advantage ; but fuch great expences were incurred m making prefents to the bey of Cairo and Suez, as to con- fume the whole profits gained by the fale ot the cargo. The great purpofe of the expedition ■was, however, accom- plifhed, as a firman was obtained from th(j government of Cairo to trade by the way of Suez. In confequence of this, three (hips went to Suez the following year, and as many In t778 The opening of this trade alarmed the jealoufy of the Eaft India Company ; they applied to our govern¬ ment, and orders were given to relinquifh this promifing commerce Thefe orders reached Egypt fooner than Bengal, and the confequence was fatal to the unfortunate adventu¬ rers who vifited Suez that year (1779)- By a P*311 con* certed between the beys, a large body of Bedouin Arabs attacked the caravan pafiing from Suez to Cairo with goods valued at 12 lacks of rupees. The goods were plun¬ dered, the Europeans were flripped and left naked in the defert, expofed to the burning rays of the fun, without a drop of water to quench their thirft, or food to fupport life. Moft of them died, and fome of their bodies were afterwards found mangled and disfigured by wolves. We have been favoured with a particular account of the fuffer- ings of our countrymen by a correfpondent, which, we are forry, we have not room to infert. Thofe who wifh to cbtain a more full account may confult the Annual Regi- for 1781 or 1782. SUFFETULA (anc. geog.), a town of Africa, in the dominions of Carthage ; probably fo called from Suffetes, the title of the magiftrates of that city. It is now called Spaitla, in the kingdom of Tunis, and has many elegant re¬ mains of antiquity. There are three temples in a great meafure entire ; one of them of the Compofite order, the other two Corinthian. “ A beautiful and perfeft capital of the Compofite order (fays Mr Bruce), the only perfect one that now exilts, is defigned in all its parts in a very large fize ; and with the detail of the reft of the ruin, is a precious monument of what that order was, now in the col- feftion of the king.” The town itfelf (he fays) is fitua- ted in the moft beautiful fpot in Barbary, furrounded by great numbers of juniper-trees, and watered by a plealant ftream, which finks under the earth at that place, without appearing any morfc. SUFFOCATION, in medicine, the privation of re- fpiration or breathing. See the articles Drow'ning, Hang¬ ing, &c. SUFFOLK, a county of England. Its name is con- trafted from Southfoiky fo called from its fit nation in regard to Norfolk. It is bounded on the weft by Cambridge- ftiire ; on the fouth by Effex, from which it is parted by the river Stour ; on the eaft by the German Ocean; and on the north by Norfolk, feparated from it by the Leffer Isu^b's edi Oufe and the Waveney. From weft to eaft it is 52 miles in length, about 20 at a medium in breadth, and 196 in cir¬ cumference. It contains 22 hundreds, 29 market towns, 575 parifhes, upwards of 34,000 houfes, and more than 200,000 inhabitants. The whole is divided into two parts, viz. the Liberty of St Edmund, and the Geldable ; the for¬ mer of which contain the weft parts of the county, and the other the eaft; and there is a grand jury for each at the vn of Cam eris Bri- annia. S U G aflizes. The air is/reckoned as wholefome and pleafant as Suffagm anv in the kingdom, nor is it otherwife upon the fea coaft, ' • - " ■ ^ , * r r r ,t n-es. The very rich, being a compound of clay and marie. Towards the fea there are large heaths and tra&s of fand ; but thefe produce hemp, rye, and peafe, and feed great flocks of fheep. A- bout Newmarket the foil is much the fame ; but in high Suffolk or the woodlands, befides wood, there are very rich paftures, where abundance of cattle are fed. In other parts of the county, as about Bury, there is plenty of corn. Af this county is noted for the richnefs of its paftures, fo is it for butter and cheefe, efpecially the former, which is faid to be remarkably good ; fo that being packed up in fir¬ kins, it is fold for all ufes both by lea and land, and con¬ veyed to many parts of England, efpecially to Lopdon. The inland parts of the county are well fupplied with wood for fuel, and thole upon the fea-coaft with coals from New- caftle. The manufa&ures of the county are chiefly wool¬ len and linen cloth. It lies in the diocefe of Norwich, has two archdeacons, viz. of Sedbury and Suffolk ; gives title of earl to a branch of the Howards ; fends two members to parliament for the county, and two for each of the follow¬ ing places, Ipfwich, Dunwich, Orford, Aldborough, Sud¬ bury, Eye, and St Edmund’s-Bury. The county is ex¬ tremely well watered by the following rivers, which either traverfe its borders, or run acrofs into the German Ocean, viz. the Leffer Oufe, the Waveney, the Blithe, the Dcben, the Orwell or Gipping, and the Stour. SUFFRAGAN, an appellation given to Ample bifhop* with regard to archbifhops, on whom they depend, and to whom appeals lie from the bifhops courts. Suffragan is likewife the appellation given to a biftiop, who is occafionally appoiated to refide in a town or village, and affift the diocefan. SUFFRAGE, denotes a vote given in an affembly, where fomething is deliberated on, or where a perfon is ele&ed to an office or benefice. SUFFRUTEX, among botanifts, denotes an underfhrub, or the loweft kind of wmody plants, as lavender. SUGAR, a folid fweet fubftance obtained from the juice of the fugar-cane ; or, according to chemifts, an effential fait, capable of cryftallization, of a fweet and agreeable fla¬ vour, and contained in a greater or lefs quantity in al- moft every fpecies of vegetables, but moft abundant in the fugar-cane. 1 As the fugar-cane is the principal produftion of the Weft Valneof Indies, and the great fource of their riches ; as it is fo im-fuKar pertant in a commercial view, from the employment which it gives to feamen, and the wealth which it opens for mer¬ chants; and befides is now become a neceffary of life—it may juftly be efteemed one of the moft valuable plants in the world. The quantity conlumed in Europe is eftimated at nine millions Sterling, and the demand would probably be greater if it could be fold at a reduced price. Since fugar then is reckoned fo precious a commodity, it muft be an ob¬ ject of defire to all perfons of cmiofity and refearch, to ob¬ tain fome general knowledge of the hiftory and nature of ‘ the plant by which it is produced, as well as to underftand the procefs by which the juice is extra&ed and refined. We will therefore firft inquire in what countries it originally flourifhed, and when it was brought into general ufe, and became an article of commerce. From the few remains of the Grecian and Roman authors which have furvived the ravages of time, we can find no proofs that the juice of the fugar-cane was known at a very early period. There can be no doubt, however, that in thofe countries where it was indigenous its value was not long con- Su^ar. SVG [ 55 ] SVG toncca?ec!. It is not improbable that it was known to travelled into the Eafl about the year 1250, found fugar in s,’gar ^he ancient Jews; for there is fome reafon to fuppofe, that abundance in Benoal. Vafco de Gama, who doubled the the Hebrew word nip, which occurs frequently in the Old Cape of Good Hope in 1497, relates, that a coniiderable biv known Tellament, and is by our tranflators rendered fometimes ca/a- trade in fu^ar was then carried on in the kingdom of Ca- —* Greek and Roman au¬ thors. : -I Was proha blv known X Ciuuucin., auu in uui — to the an- mus and fometimes fiveet-cane, does in faff mean the lu cent Jews. gar.canet qqie pafage in which we have obferved it mentioned is Exod. xxx. 23. where Mofes is commanded to make an ointment with myrrh, cinnamon, kene, and caflia. Now the kene does not appear to have been a native of E- pypt nor of Judea; for in Jeremiah vi. 20. it is mentioned as coming from a fat country. “ To what purpefe cometh there to me incenfe from Sheba and the fweet-cane from a far country ?” This is not true of the calamus aromaticus, 3 which grows fpontaneoufly in the Levant, as well as in many Account of parts of Europe. If the cinnamon mentioned in the pafTage ^ by of Exodus quoted above was true cinnamon, it mult have come from the Eaft Indies, the only country in the world from which cinnamon is obtained. There is no difficulty therefore in fuppofmg, that the fugar-cane was exported from the fame country. If any credit be due to etymology, it confirms the opinion that kene denotes the fugar-cane ; for the Latin word canna and the Englifh word, cane are evi¬ dently derived from it. It is alfo a curious fact, that fachar or Jheker in Hebrew, figniftrt inebriation, from which the Greek word aa.xx3? “ fugar” is undoubtedly to be traced. The fugar cane was firft m?de known to the weftern parts of the world by the conquefts of Alexander the Great. » Lib. xv Strabo * relates that Nearchus his admiral found it in the Eaft Indies in the year before Chrift 325. It is evidently alluded to in a fragment of Theophraftus, preferred in Pho- tius. Varro, who lived A. C. 68, defcribes it in a frag- ; Lit. xvi;.ment quoted by Ifidorus $ as a fluid prefled from-reeds of ap. 7. a large fize, which was fvveeter than honey J|. Diofcorides, about the year 35 before Chrift, fays “ that there is a kind of [xv.' Cai ’ honey cahed faccharon, which is found in India and Arabia Felix. It has the appearance of fait, and is brittle when chewed. If diflfolved in water, it is beneficial to the bowels and ftomach, is ufe:ul in difeaies o^the bladder and kidneys, and, when fprinkled on the eye, removes thofe fubftances that obi cure the iight.‘,> ihis is the hrft account we have of its medical qualities. Oalen often prefenbed it as a me¬ dicine. Lucan relates, that an oriental nation in alliance with 1 ompey uied the juice of the cane asa common drink. Unique bibunt tenera dulcet ab arundine fuccos. Lib. iii, 237. Pliny fays it was produced in Arabia and India, but 11 that the heft came from the latter country. I« Is alfo men¬ tioned by Arrian, in his Periplus of the Red Sea, by the name of {/achat) as an article of commerce from India to Nat Hi/, the Red Sea. iElian If, Tmuilian J, and Alexander Aphro- i- ^“'‘chfeust, mention it as a fpecies of honey procured from Lib. ii. canes (a). •, vb. 7y. That the fugar-cane Is an indigenous plant in fome parts a native f 'nn f havTe the ^ongeft reafon to believe ; ftheS f?1 1 hunberg f^nd in JW and has accordingly mem ‘d,e8* ZtV- a nar Tatrr in his F/ora J°P°nica, Publi^d in 1784. Olheck alfo found it in China in It'may indeed have been tranfplanted from fome other coun¬ try ; but as it does not appear from hiftory that the inha¬ bitants of Japan or Chma ever carried on any commerce trade in fugar was then carried on in the kingdom of licut. On the authority of Diofcorides and Pliny', too, we ffiould be difpofed to admit, that it is a .native of Arabia, did wd net find, on confulting Niebuhr’s Travels, that that botanift has omitted it when enumerating the molt valuable plants of that country. If it be a fpontaneous production of Arabia, it mult ftill flouriffi in its native foil. Mr Bruce found it in LTpper Egypt. If we may believe the relation of Giovan Lioni, a confide rable trade was carried on in fugar in Nubia in 1500 : it abouifted alfo at Thebes, on the Nile, and in the northern parts of Africa, about the fame period. y There is reafon to believe that the fugar-cane was intro-?ntro^ucet* duced into Europe during the crufades ; expeditions which however romantic in their plan, and unfuccefsful in their during the execution, were certainly productive of many advantages to crufades. the nations of Europe. Albertus Aquenfis, a monkifh writer, obferves, that the Chriftian foldiers in the Holy Land frequently derived refreffiment and fupport during a fearcity of provifrons by fucking the canes. Thisxplant flourifhed alfo in the Morea, and in the Hands of Pmodes and Malta; from which it was tranfported into Sicily. The date of this tranfaCtion it is not eafy to afeertain ; but we are fure that fugar was cultivated in that Hand previous to the year 1166 ; for Lafitau the Jefuit, who wrote a hi¬ ftory of the Portuguefe difeoveries, mentions a donation made that year to the monaftery of St Bennet, by William the fecond king of Sicily, of a mill for grinding fugar-canes, with all its rights, members, and appurtenances. trom Sicily, where the fugar cane ftill flourifhes on the fides of mount Hybla, it was conveyed to Spain, Madeira, n'OrvUl V the Canary and Cape tie Verd Hands, foon after they were Travels! * difeovered in the 13th century. 6 * An opinion has prevailed^, that the fugar-cane is not a na- SuPP°Rel tive of the weftern continent, or its adjacent Hands the Weft^ta™etive Indies, but was conveyed thither by the Spaniards or Por-of America tuguefe foon after the difeovery of America by Columbus.01- the Weft- From the teftimony of Peter Martyr, in the third book oflndiei* his firft decade, compofed during Columbus’s fecond voyage, which commenced in 1493 an(d ended in 1495, it appears, that the fugar-cane was known at that time in Hilpaniola. It may be faid, that it was brought thither by Columbus ; but for this aftertion we have found no diredl evidence ; and though we had dired evidence, this would not prove that the fugar-cane was not an indigenous plant of the Weft In¬ dies. There are authors of learning who, after inveftigating this fubjedf with attention, do not hefitate to maintain, that it is a native both of the Hands and of the continentof Ame¬ rica. I. Lab at has fupported this opinion- with much appear¬ ance ol truth jl ; and, in particular, he appeals to the tefti- 1 Tom. ia. mony of Thomas Gage, an Engliihman, who vifited Newc-Xv’- Spam in 162;. Gage enumerates fugar-canes among the rh^ L- provifrons w.th which the Chandbes of Guadaloupe fuppliednion on" - is (hip. “ Now (fays Labat) it is a tael that the Spaniards P°feci fry had never cultivated an inch of ground in the Smaller tilles. Their drips commonly touched at thofe Hands in¬ deed for wood and water; and they left fwine in the view with remote nations, it could only be conveved> fT °! )vaod.a'ld. water» ?nd tht7 left fwine in the view neighbouring country. Marco Polo, a noble Venetian who a with freffi provifions fuch of their countrymen , nooie v enetian, who as might call there in future ; but it would be abiurd in the - higheit aftiocs, in Volume IV.Ty D? Falcone^ may°S confulted? ^ ^ and 11x10,1116 ages' a *paper of the Manchefter Trat& r Sugar. s u a W’ned decree to fuppofe, that they would plant fu^^r- canes, and at the fame time put hoa8 afhore to ^rtroy them, u Neither had the Spaniards any motive tor hdtovi, this plant on itlands which they conficlered as ot no kmd uns v . .1 Wen men- of imoortance, except for the purpofe that has been men- j .U-if vP.' Pti^mibes munit have cul- 8 From tedi- snor-y, lUlUUltanvvj —J.— 11 . , -i tioned ; and to fuppofe that the Charaibes might have c tivated, after their departure, a produdion of which they knew nothing, betrays a total ignorance ot the Indian cil- pofition and charadter. , t " But (continues Labat) we have furer teflimony, and v i n fnorar-cane fuch as proves, beyond all contradiction, that the fugar-cane is the natural production of America, tor, betides t .e evi¬ dence of Francis XImints, who, in a Treatife on American > Plants, printed at Mexico, aflerts, that the fugsr-cane grows without* cultivation, and to an extraordinary fize, on the banks of the river Plate, we are a (hired by Jean de l.ery, a Proteftant minifter, who was chaplain in 1550 to the Dutch garrifou in the fort of Coligny, on the river Janei¬ ro, that he himfelf found fugar-canes in great abundance in many places on the banks of that river, and m lituations ne¬ ver vifited by the Portuguefe. Father Flennepen and other voyagers bear teftimony in like manner to the growth ot the cane near the mouth of the Mitfifirppi ; and Jean ue X-aet to its fpontaneous production in the ifland of St \ in¬ tent. It is not for the plant itfelf, therefore, but for the feeret of making fugar from it, that the Wetl Indies aie in¬ debted to the Spaniards and Portuguefe ; and thefe to the nations of the eatt.” , . , , , , T r Such is the reafoning of Labat, which the learned Lah- tau has pronounced incontrovertible; and it is pi fatly (Lengthened by recent difeoveries, the fugar cane having been found in many of the ifiands of the Pacific Ocean by our late illuftrious navigator Captain Cook. FkfcnHtion fugar-cane, or faccharum officinarum of hotanifts, is a < i' the fu- jointed reed,commonly meafuring (the flag part not included) from three feet and a half to feven feet in height, hut fome- times riling to 12 feet. When ripe it is of a fine if raw co¬ lour inclining to yellow, producing leaves or blades, the edges of which are finely and lharply ferrated, and termina¬ ting in tin arrow decorated with a panicle. I he joints in one ftalk are from 40 to 60 in number, and the llalks riling from one root are fometimes very numerous. The young fnoot afeends from the earth like the point of an arrow ; the {haft of which foon breaks, and the two lirft leaves, which had been inclofed within a quadruple {heath of feminal leaves, rife to a coniiderable height (b). See PlateCCCCLXXXVL M is the arrow and N the lower part with the root. As the cane is a rank fucculent plant, it mult require a ftrong deep foil to bring it to perfection, perhaps indeed no foil can be too rich for this purpofe. The foil which ex¬ perience has found to be moll favourable to the cultivation of it in the Weft Indies is the dark grey loam ot St Chrif- topher’s, which is fo light and porous^as to be penetrable by the flrghteft application of the hoe. The under llvatum is gravel from 8 to' 1 2 inches deep. Canes planted in par¬ ticular fpots in this illand have been known to yield 8000 gar canc. To Soil moft favourabe to its growth. <6 j S' IT G' pounds of Mtifcovado fugar from a fingle acre. The av*« Sugar, rao-e produce of the ifland for a feries of years has been j 6,coo hegfteads of 16 cwt. which is one-half only of the whole cane-land, or 8500 acres. Wrhen annually cut, it gives nearly two'hogfheads of 16 cwt. per acre lor the whole of the land in ripe canes. Next to the aftry loam of St Chnftopher’s is the loil which in Jamaica is called brick-mold ; not as refembling a brick in colour, but as containing fuch a due mixture of clay and fand as is fuppofed to render it well adapted for the ufe of the kiln. It is a deep, warm, and mellow, hazel earth, eafily worked; and though its furface foon grows dry after'rain, the under ftratun retains a confiderabk degree of rnoifture in the drieft weather ; with this advantage too, that even in the wetteft feafon it feldom requires trenching. Plant canes, by which is meant canes of the firft growth, have been known in very fine feafons to yield two tons and a half of fugar per acre. After this may be reckoned the black mold of feveral varieties. The heft is the deep black Eiw.rA1, earth of Barbadoes, Antigua, artd fome. other of the wind- ward ifiands ; but there is a ipecies of this mold in Jamaica*^ that is but little, if any thing inferior to it, which abounds ^ ^ with limeftone and flint on a iubftrattim ot foapy rnatle* Black mold on clay is more common; but as the mold is ge¬ nerally {hallow, and the clay (tiff and retentive of water, this la ft fort of land requires great labour, both in ploughing and trenching, to render it profitable. When manured and properly pulverized, it becomes very productive. It is un- ncceffary to attempt a minute defeription of all the other foils which are found in thefe ifiands. There is, however, a peculiar fort of land on the.north fide of Jamaica, chiefly in the parifh of Trelawney, that cannot be pafled over un¬ noticed, not only on account of its Icarcity hut its value ; few foils producing finer fugars, or fuch ns anfwerfb ‘well in the pan ; an expreffion fignifying a greater return of refined fugar than common. The land alluded to is generally of a red colour; the {hades of which, however, vary tonfiderably from a deep chocolate ty a rich fcailet ; in fome places it approaches to a bright yellow, but it is-everywhere remark¬ able, when firft turned up, for a glofty or Ihining furface, and if wetted ftains the fingers like paint. n As in every climate there is a feafon more favourable for f,rppe( vegetation than others, it is of great importance that plants fbn for for feed be committed to the ground at the commencementplaiui“i of this feafon. As the cane requires a great deal of moil- ture to bring it to maturity, the propereft feafon for plant¬ ing it is in the months of September and October, when the autumnal rains commence, that it may be fufficiently luxu¬ riant to fhade the ground before the dry weather fets in. Thus the root is kept moift, and the crop is ripe for the mill in the beginning of the enfuing year. Canes planted in the month of November, or later in the feafon, lole the advantage of the autumnal rains; and it orten happens that dry weather in„the beginning of the enfuing year retards their vegetation until the vernal or May rains fet in, when they fprout both at the roots and the joints ; fo that by (b) “A field of canes, when {landing, in the month of November, when it is in arrow or full hlofiom (fays Mr Beck- ford in his deferiptive Account of the Ifiand of Jamaica), is one of the moft beautiful produaions that the pen or pencil can pofhbly deferibe. It in common rifes from three to eight feet or more in height ; a difference of growth that very itrongly marks the difference of foil or the varieties of culture. It is when ripe of a bright and golden yellow ; and where obvious to the fun, is in many parts very beautifully ftreaked with red : the top is of a darkifh green ; but the more dry it becomes, from either an excefs of ripenefs or a continuance of drought, of a ruflet yellow, with long and narrow leaves depending; from the centre of which fhoots up an arrow like a filver wand from two to fix feet in height ; and from the fummits of which grows out a plume of white feathers, which are delicately fringed with a lilac dye ; and indeed is, in its appearance, not much unlike the tuft that adorns this particular and elegant tree. S U G r J7 ] .S. U ° Soper, the time they are cut the field is loaded with unripe for the want of attention in this particular, •—v fuckers inftead of fugar-canes. A January plant, however. A careful ma¬ nager will remove at the fame time all the lateral fhoots or Sugar, commonly turns out well ; but canes planted very late in the fpring, though they have the benefit of the May rains, fel- dom anfwer expeftation ; for they generally Come in unfea- fonably, and throw the enfuing crops out oF regular rota¬ tion. They are therefore frequently cut before they arc ripe ; or if the autumnal feafons fet in early, are cut in wet weather, which has probably occafioned them to fpring a- fredi; in either cafe the effect is the fame : The juice is un- concofted, and all the fap being in motion, the root is de¬ prived of its natural nourifhment, to the great injury of the ratoon. The chief objection to a fall plant is this, that the canes become rank and top heavy, at a period when vio¬ lent rains and high winds are cxpedted, and are therefore frequently lodged before they are fit to be cut. Method of The fugar-cane is propagated by the top-fiioots, which planting are cut from the tops of the old canes. The ufual method of planting in the Weft Indies is this : The quantity of land intended to be planted, being cleared of weeds and ,1 other incumbrances, is firft divided into feveral plats of cer¬ tain dimenfions, commonly from 15 to 20 acres each ; the i fpaces between each plat or divifion are left wide enough for roads, for the convenieney of carting, and are called inter¬ vals. Each plat is then fubdivided, by means of a liny and wooden pegs, into fmall fquares of about three feet and a half. Sometimes indeed the fquares are a foot larger ; but this circumftance makes but little difference. The negroes are then placed in a row in the firft line, one to a fquare, and direfted to dig out with their hoes the feveral fquares, commonly to the depth of five or fix inches. The mold which is dug up being formed into a bank at the lower fide, the excavation or cane-hole feldom exceeds 15 inches in width at the bottom, and two feet and a half at the top. r! he negroes then fall back to the next line, and proceed as be'ore, Thus the feveral fquares between each line are formed into a trench of much the fame dimenfions with that which is made by the plough. An able negro will dig from 100 to 120 of thefe holes for his day’s work of ten hours ; but if the land has been previoufly ploughed and lain tallow, the fame negro will dig nearly double the num¬ ber in the fame time (c). Pit! The cane-holes or trench being now completed, whether f)I by the plough or by the hoe, and the cuttings fele&ed for planting, which are commonly the tops of the canes that have been ground for fugar (each cutting containing five or fix gems), two of them are lufficient for a cane hole of the dimenfions deferibed. ft hefe, being placed longitudinally in the bottom of the hole, are covered with mold about two inches deep ; the reft of the bank being intended for future life. In 12 or 14 days the young fprouts begin to appear ; 13 and as foon as they rife a few inches above the ground, : are> °r *° ke> carefully cleared of weeds, and 1 * ' furniftred with an addition of mold from the banks. This is ufually performed by the hand. At the end of four or , five months the banks are wholly levelled, and the fpaces t between the rows carefully hoe-ploughed. Frequent clean- r mgs, while the canes are young, are indeed fo effentially ne- ceffary, that no other merit in an overfeer can compenfate Vol. XVIII. Part I. l 14 fuckers that fpring up after the canes begin to joint, as they feldom come to maturity, and draw nourishment from the original plants. “ In the cultivation of other lands, in Jamaica efpecially The plough (fays Mr Edwards, the elegant historian of the Weft Indies,5111^ whofe fuperior excellence has induced us frequently to refer . to him in the courfe of this article), the plough has been 0 introduced of late years, and in fome few cafes to great ad¬ vantage ; but it is not every foil or fituation that will admit the ufe of the plough ; fome lands being much too Itony, and others too fteep ; and I am forry I have occafion to re¬ mark, that a pradtice commonly prevails in Jamaica, on pro¬ perties where this auxiliary is ufed, which would exhautt the fineft lands in the world. It is that of ploughing, then crofs-ploughing, round-ridgimr, and harrowing the fame lands from year to year, or at lead every other year, with¬ out affording manure: accordingly it is found that this me¬ thod is utterly deftruCtive of the ratoon or fecond growth, and altogether ruinous. It is indeed aftoniihing that any planter ot common reading or obfervation fhould be paffivff under fo pernicious a fyftem. Some gentlemen, however, of late manage better : their praClice is to break up ftiff and clayey land, by one or two ploughings, early in the fpring, and give it a fummer’s fallow. In the autumn following, being then mellow and more eafily worked, it is holed and planted by manual labour after the old method, which has been already deferibed. But in truth, the only advantage- EJivardt'* ous fyftem of ploughing in the Weft Indies is to confine it °f to the fimple operation of holing, which may certainly be performed with much greater facility and difpatch by theVol. ir. plough than by the hoe ; and the relief which, in the cafe of ftiff and dry foils, is thus given to the negroes, exceeds all eftimation, in the mind of a humane and provident own¬ er. On this fubjeft I fpeak from praClical knowledge. At a plantation of my own, the greateft part of the land which is annually planted is neatly and fufficiently laid into cane- holes, by the labour of one able man, three hoys, and eight ©xen, with the common fingle-wheeled plough, 'fhe plough- firare indeed is fomewhat wider than ufual; but this is the only difference, and the method of ploughing is the fimpleft poffible. By returning the plough back along the furrow, the turf is alternately thrown to the right and to the left, forming a trench feven inches deep, about two feet and a half wide at the top, and one foot wide at the bottom. A fpace of 18 or 20 inches is left between each trench, on which the mold being thrown by the fhare, the banks are properly formed, and the holing is complete. - Thus the land is not exhaufted by being too much expofed to the fun ; and in this manner a field of 20 acres is holed'with one plough, and with great eale, in 13 days. The plants are afterwards placed in the trench as in the common me¬ thod, where manual labour alone is employed. In molt parts of the Weft Indies it is ufual to hole and plant a certain proportion of the cane-land, commeuly one- third in annual rotation. Canes of the firft year’s growth Canc^na- are called plant canes^ as has been already obferved. Theroedac- fprouts that fpring from the roots of the canes that havecordu,° to rj- .the age of keen their roots. fnrLJrr, " negI(?es work at l^s hufmefs very unequally, according to their different degrees of bodily ftrength, it is nlnnoh C-t ^ ^ra i ^ t0 ^Ut t'vo negroes *<> a fingle fquare ; but if the land has not had the previous affiftance of the to eafe’tL'001111110!! 7 ^ ,abour of 5° able negroes for 13 days to hole 20 acres. In Jamaica, fome gentlemen, holintr ana nW ^ r T*" * US laborious Part of thc planting-bufinefs performed by job-work. The ufual price far land is commonlv'asmuch ^ ^ t0 L' 4? 7 S* Sttrli.ag)- The coll of faffing and clearing heavy wood- Sugar. 16 Manures employed. The fugar- cane de- rtroye 1 by monkeys. S U G" [58 been nrevioufly eut for fugar are tailed ro/oew; the firft yearly returns from their roots are called/r// ratoons ; the fecond year’s growth, fecond ratoons. Mr Edwards informs us, that the manure generahy uied is a compoft formed, ift, Of the_ vegetable afaes, drawn from the fires of the boiling and ftill houfes. 2dly, recu- lencies difeharged from the ftill-houfe, mixed up with rub- bilh of buildings, white-lime, &c. jdly, Refufe, or held- trafh (i.> iv< too ripe, and then the fruit hath not the requifite qualities. The time of gathering them ftould be at a fixed feafon, and probably the months of March and April are the nt- - - • • ‘'all the fweet fruits are ripe at that thither by the French, when they poffeffed half that ifiand; they come down from the rocks in filent parties by night, and having polled centinels to give the alarm if any thing approaches/they deftroy incredible quantities of the cane, by their gambols as well as their greedinefs. It is in vain to fet traps for thefe creatures, however baited ; and the on ly way to protect the plantation, and deflroy them, is to iy way to protect tne pwauu-iuii, > * . r fet a numerous watch, well armed with fowling-pieces,#and tell for it; becaule r will nprfnrm this fervice time, while tlie lour furnifted with dogs. The negroes will perform this fervice cheerfully, for they are very-fond of monkeys as food. 1 ne celebrated Father Labat fays,, they are very delicious, but the white inhabitants of St Kitt’s never eat them. The low-land plantations fuffer as much by rats as thofe on the mountains do from monkeys ; but the rats, no more than the monkeys, are natives of the place ; they came with the time, while’the four ones do not arrive to a flate of matu¬ rity till the months of July and Augufl. The Englift cut their canes in Match and April; but they are not induced to do this on account of their ripenefe. The drought that prevails in their iflands renders the rams which fall in September neceffary to their planting ; and as the monkeys, are natives of the place; uiey came w^u tnC the canes are 18 m®Rt^ ^ )"°d 3 „ dipping from Europe, and breed in the ground under loofe bn/A ^ iflands (fays Mr Edwards) A feafjru rocks and buftes : the field negroes eat them greedily, and . r 1 T r d Lftiuitv to man and b‘aall Sof£ft*v‘ty- thev are laid to be publicly fold In the markets at Jama,- is the feafon of gladnefs and fefti 5 iuicetf the cane “w'' ra ' l o fr-e the t'lantatlons from thefe vermin, the breed palatable, lalutary, and nounlhing, is the juice ot the cant, vol „ Cof wild ca[: mould’be encoukred, and fnakes’fuffered fhat every individual of the an- — multiolv unmolefted : they may alfo be poifoned wrth ar- of it, derives health and vigour from its ule 1 feniefand the rafped root of the calfava made into pellets, and fickly among the negroes exhibit * f|^rlfu'| fe ^ and plentitully fcattered over the g-ounds. This pradlice, in a lew weeks after the null » ^ however is dangerous ; for as the rats when thus poifoned mg hortes, oxen, and mules, though almoh confta y teome exceeding thirfty* they run in droves to the neigh- work doling this feafon, vet, b“"S bouring ftreams, which they poifon as they drink, and the the green tops or this noble plant, and iome o e cattle grazing on the banks of thefe'polluted waters have mings from the boiling-houfe, improve more than at a y frequently penfted bv drinking after them : It is fafer there- other period of the year. Even the pigs and poultry fore to make the pallets of flour, kneaded with the juice of ten on the refufe. In ftort, on a ^U-regulated P^ntatio", the ni ht-ftade, the Lent of which will drive them away under a humane and benevolent dircftor, there is luch an inc - - A • — • - n t ji • appearar)ce during crop-time of plenty and bufy cheerful- nefs, as to foften, in a great mealure, the hardfttps of fla- very, and-induce a fpedlacor to hope, when the milenes of life are reprelented as iniupportable, that they are fometimes exaggerated through the medium of fancy.” The plants being cut, the branches at the top are given to the cattle for food ; the top-fhoot, which is lull of eyes. though they will not eat it. There is an Eafl Indian ani¬ mal called mangoes, which bears a natural antipathy to rats; if this animal was introduced into our fugar iflands, it would probably extirpate the whole race of thefe noxious vermin. The formica otnntvora of Linnaeus, the carnivorous ant, which is called in Jamaica the rnjjlc’s ant, would foon clear a fugar plantation of rats. ('d) The account given in the text concerning the time when the fugar-canes are collected, we have taken from the Abbe Raynal’s Hiflory of the Trade and Settlements of the Eadt and Weil Indies ; but Mr Cazaud obferves, thzl i February, March, and April, all the canes, whatever be their age, are as ripe as the nature of the foil ever allows tnern^ ^ to be. He fays farther, that the drynefs ob the weather, and'not the age of the canes, which increafes from January to April, is the caufe that in January 400 gallons of juice commonly yield 48 gallons of fugar and molaiies one witir ano¬ ther ; in February from 96 to 64 ; in March from 64 to 72 ; in April fometimes 80 ; after which period tne lugar ler- ments, and even burns, when the refiner is not very expert at his bufinefs SUO r 59 1 S U G Sugar, V. he juice trailed ts preferved for planting. The cancs ?irc ent into pieces «—V-—about a yard long, tied up in bundles, and carried in carts ’h/ernes to t^e where they are bruifed, and the juice is extraft- /hen cut ed from them. The mill coufilts principally of three up- re fent to right iron-plated rollers or cylinders, from 30 to 40 inches lemill. in length, and from 20 to 25 inches in diameter; and the middle one, to which the moving power is applied, turns the other two by means of cogs. Between thefe rollers, the canes (being previdufly cut fliort, and tied into bundles) are twice comprefied ; for having palled through the firft and fecond rollers, they are turned round the middle one by a circular piece of frame-work or fereerr, called in Jamaica the Dumb- returner, and forced back through the fecond and third ; an operation which fqueezes them completely dry, and fometimes even reduces them to powder. The cane juice is received in a leaden bed, and thence conveyed into a vefiel called the receiver. The refufe, or macerated rind of the cane (which is called cane-trajh, in contradiilintfion to field- trafi), ferves for fuel to boil the liquor. The juice as it flows from the mill, taken at a medium, contains eight parts of pure water, one pare of fugar, and am them. one part confiding of coarfe oil and mucilagious gum, with a portion of elfential oil. jfltbuftd -A-3 this juice has a ftrong difpolition to fermentation, it r purify- TTurft be boiled as foon as poffible. There are fome water- git are, mJUg t}iat wjp grind with great eafe canes fufficient for 30 hoglheads of fugar in a week. It is neceflary to have boil¬ ing veflels, or clarifiers, that will correfpond in dimenfions to the quantity of juice flowing from the receiver. Thefe clarifiers are commonly three in number, and are fometimes capable of containing toco gallons each; but it is more ufual to fee them of 300 or 400 gallons each. Befides the clarifiers which are ufed for the firll boiling, there are ge¬ nerally four coppers or boilers. The clarifiers are placed in the middle or at one end of the boiling-houfe. ff at one end, the boiler called the teache is placed at the other, and feveral boilers (generally three) are ranged between them. The ■ teache is ordinarily from 70 to too gallons, and the boilers between the clarifiers and teache diminifh in fize from the firft to the lad. Where the clarifiers are in the middle, there is ufually a let of three boilers of each lide, which con- ftitute in eftedl a double boihng-houle. On very large eftates this arrangement is found.ufeful and neceflary. The objeftion to fo great a number is the expence of fuel ; to obviate which, in fome degree, the three boilers on each fide of the clarifiers are commonly hung to one fire. i he juice runs from the receiver along a wooden gutter lined with lead into the boiling-houfe, where it is received into one of the clarifiers. When the clarifier is filled, a fire is lighted, and a quantity of Briflol quicklime in powder, which is cafled temper, is poured into the veffel. The ufe of the lime is to unite with the fuperabundant acid, which, for the fuccefs of the procefs, it is neceffary to get rid of. The quantity fufficient to feparate the acid muft vary ac¬ cording to the ftrength of the quicklime and the quality of the liquor. Some planters allow a pint of lime to every 100 gallons o! liquor ; but Mr Edwards thinks that little more than half the quantity is a better medium proportion, and even then, that it ought to be diffolved in boding, wa¬ ter, that as little of it as poffible may be precipitated. The beat is fuffered gradually to increafe till it approaches within few degrees of the heat of boiling water, that the impurities may be thoroughly feparated. But if the liquor were iuffered to boil with violence, the impurities would again incorpo¬ rate with it. _ It is known to be fufficiently heated when fmtfi i’eSlnS t0 nfe in bl‘fters> which break into white • 1 ’ afjJaPPear generally in about 40 minutes. The fire u eniy extinguiflied by means of a damper, which1 ie dari excludes the eternal air, and the liquor is allowed to re- mam about an hour undiflmrbrd, during which period the ~*'v impurities are colle&ed in feum on the furface. The juice is then drained off either by a fyphon or a cock ; the feum - being of a tenacious gummy nature, does not flow out with the liquor, but remains behind in the clarifier. The liquid juice is conveyed- from the clarifier by a gutter into the eva¬ porating boiler, commonly termed the and if it has been obtained from good canes it generally appears tranfparent. ^ In the evaporating boiler, which fhould be large enough And four to receive the contents of the clarifier, the liquor is allowed c0PPers. to boil; and as the feum rifes it is taken off. The feurru ming and evaporation are continued till the liquor becomes finer and thicker, and fo far diminilhed in bulk that it may be ealily contained in the fecond copper. When put into the fecond copper, it is nearly of the colour of Madeira wine ; the boiling and feumming are continued, and if the impurities be confiderable, a quantity of lime water is ad¬ ded. This procefs is carried on till the liquor be fufficiently diminifhed in quantity to be contained in the third copper. After being purified a third time, it is put into the fourth copper, which is called the teache, where it is boiled and eva¬ porated till it is judged fufficiently pure to be removed from the fire. In judging of the purity of the,liquor, many of the negroes (fays Mr Edwards) guefs folely by the eye (which by long habit they do with great accuracy), judging by the appearance of the grain on the back of the ladle : but the pra&ice moft in ufe is to judge by what is called the touch ; i e. taking up with the* thumb a fmall portion of the hot liquor from the ladle ; and, as the heat diminifhes, drawing with the fore-finger the liquid into a thread. This thread will fuddenly break, and fhrink from the thumb to the iufpended finger, in different lengths, according as the liquor is more or lefs boiled. The proper boiling height for ftrong mufeovado fugar is generally determined by a thread of a quarter of an inch long. It is evident, that cer¬ tainty in this experiment can be attained only by long habit, and that no verbal precepts will furnifh any degree of (kill in a matter depending wholly on conftant prattice. . The juice being thus purified by paffing through the cla- After being rifier and four coppers, it is poured into coolers, which arecl;irifietl h ufually fix in number. The removal from the teache to the18 cool.ed’, cooler is called fnking. The cooler is a (hallow wooden indh-eed * veffel 7 feet long, from 5 to 6 wide, about 1 1 inches deep, from it* and capable of containing a hogfliead of fugar. As the li- meiaffea. quor cools, the fugar grains, that is, colle&s into an irregulaf mafs of imperfedl cryftals, feparatmg itfelf from the melaffes. It is then removed from the cooler, and conveyed to the cu- ring-houfe, where the melaffes drain from it. For receiving them there is a large ciftern, the Hoping fides of which are lined with boards. Dire&ly above the ciffern a frame of joift-work without boarding is placed, on which empty hog (heads without heads are ranged. The bottoms of thefe hogfheads are pierced with 8 or to holes, in each of which the ftalk of a plantain leaf is fixed fo as to pro- jedl 6 or 8 inches below the joifts, and rife a little above the top of the hogfhead. The hogflieads being filled with the contents of the cooler, confifting of fugar and melaffes, the melaffes being liquid, drain through the fpungy ftalk, and drop into the ciftern. After the melaffes are drained off, the fugar becomes pretty dry and fair, and is then called mufeovado or ra and who, by indulging a large family of children sdb during the decompulition otthe Tuga” whbhTcominued bee/know^in 7^ ha3 reni;":kcd’tl,at the'PlaSue ,las ”e«r An/^nW. of ammoniac. If the juice be exnofed to p0rt,10n .bable ,tbat the frequency of malignant fevers of all kindsPhasandrother mentation, . wine is oLi^ /li" " l7 ,t ^“u'^ ^ ^ ^ > — general 2^' ^ba ^ and^moo/ntT,/ f“gnr are fPP11^ are indeed numerous adelicious.feafonXX^^l^^isuf^t pharmacy for tt unties with medicines, and removes th7r qu!?r,'eaT fl‘1V0U.r: ■' ,s the bafls of all fyrups. M. Mac- f“g"r XT 3 7V ^i8^017 raa"“r h°“' ofeful has alX T'//mP y a “r kr^g Sugar able article „f fo^d L a"d 3 ValU' would defend that clafs of people who are TSSTbi^' to malignant fevers from being fo often affe&ed by them, . numerous and frequent diforders of the breaft which, occur in all countries where the body is expofed to a variable temperature of weather, fugs* affords the bafis of many agreeable remedies. It. is ufeful in weakneffes and acrid defluxions upon other parts of the body. Many ffi&s might be adduced in favour of this affertion. Dr Ruffi mentions only one, which, from the venerable name of ' the perfon whofe cafe furnifhed it, cannot fail of command¬ ing attention and credit. Upon my inquiring of Dr Frank w,*41 ■ in, at the requeft of a friend (fays our relpeflable authotj/lirKm about a year before he died, whether he had found any reliefthe Pain of’ from the pain of the ftone from the blackberry jam, of which.the * t m t j J Utlly WillU A x a,llCie ot t00d in cafes of neceffitv M Tu '"T ■ , la,rSe quantities, he told me that he had, but that he Lennes, firft furgcon to the kte Dukf of Orkan^nuhl f " ^ medielnfaI part of the jam refided wholly in the- the following ftory k tn ^ c pubhfli- lugar ; and as a reafon for thinking fo, he added that 7 411 .the Gazette dc Sanu, which confirms often found-the fame relief by taking about h^f a pint of a 3 fyrup. 4* JJot hurt¬ ful to the teeth* Shigar, f.rj-n'n, prepareS by boilin.- o i.v.v»v --or , - T -V—-" before he went to bed, that he did from a dofe of opium. It has been fuppofed by fome of the early phyficians o ur country, that the fugar obtained from the maple-tree is more medicinal than that obtained from the Weft India lugai- cane ; but this opinion I believe is without foundation. It is preferable iivits qualities to the Weft-India fugar only from its fuperior ckanlinefs. . . « Cafes may occur in which fugar may be required in me¬ dicine, or in diet, by perfons who rehife to be benefited, even indire£Ily by the labour of flaves. In iuch cafes the innocent maple fugar will always be preferred. It has been faid, that fugar injures the teeth ; but this opinion now has fo few advocates, that it does not deferve a fenous re¬ in the account which we have given above of the method of cukivatinjr and manufa&uring fugar, we have had in our eye the plantations in the Weft Indies, where flaves alone are employed ; but we feel a peculiar pleafure in having it m our 43 power to add a ihort defection of the method ufed in the Siwar ma- Indies, becaufe there fugar is manufactured by tree •nufadured ^ on a jan w}lIc^ ;s much more economical than what is Indie* bv followed in the Weft Indies. The account which we mean iremen! to give is an extraft from the report of the committee of Privy-council for trade on the fubjedt of the African flave- trade, drawn up by Mr Botham. We fhall give it m the author’s own words. ^ , “ Havino' been for twro years in the Eughih and trench Weft-Indian iflands, and flnee condu&ed fugar eftates in the Eaft-Indies; before the abolition of the flave-trade was 44 agitated in parliament, it may be deflrable to knovy that Of a fuye- fugar of a fuperior quality and inferior price to that in our ilor qnalit) jqan(js produced in the Eaft-Indies; that the culture of and at a the canej ^ manufaaure of the fugar and arrack, is, with thefe material advantages, carried on by free people. China, Bengal, the coaft of Malabar, all produce quantities of fugar and fpirits; but as the moft confiderable growth of the cane is carried on near Batavia, I fhall explain the improved manner in which fugar eftates are there condufted. The proprietor of the eftate is generally a wealthy Dutchman, who has evedled on it fubftantial mills, boiling and curing houfes. He rents this eftate to a Chinefe, who reftdes on TT G [ 6* 1 S U G a little brawn ftg* m wattr, juft trader at Batavia, as the governmentAereis . ° r- r . ? T4. »ovver jprici;. 45 How iugar ag a fuperintendant ; and this renter (fuppoiing the eftate -eftates are to con£^ Gf ,co or more acres) rekts it to freemen in par- ^ativia. at cels of 50 or 60 on thefe conditions: " rr" ‘ rL“n That they fhall plant it in canes, and receive fo much per pecul oi I33t pounds for every pecul of fugar that the canes fhall pro¬ duce.” When crop time comes on, the fuperintendant collefts a fufftcient number of perfons frem the adjacent towns -or villa¬ ges, and takes off his crop as follows. To any fet of tradef- men who bring their carts and buffaloes he agrees to give fuch a price /vr pecul to cut all his crop of canes, carry them to the mill and grind them. A fecond to boil them per pecul. A third to clay them and baflcet them for market per pecul. So that by this method of conducing a fugar eftate the renter knows to a certainty what the produce of it will coft him per pecul. He has not any permanent or unneceffa- ry expence ; for when the crop is taken oft, the tafkmen return to their feveral purfuits in the towns and villages they came from ; and there only remains the cane planters who are preparing the next year’s crop. I his like all other complex arts, by being divided into feveral branches, renders the labour cheaper and the work more perfe&ly done. Only clayed fugars are made at Batavia; thefe are in quality iequal to the beft fort from the Weft Indies, and are fold fo fow from the fugar eftates as eighteen fhillings fterling per pecul of jjjiiibs. This is not the felling price' to the fu'mr fubjedtfto duties irripofed at will. The Shabander ex adts a dollar per pecul on all fugar exported. The price of common labour is from qd to 1 od per day. By the method of carrying on the fugar eftates, the tafkmen gain conhder- ably more than this not only from working extraordinary hours, but from being confldered artifts in their feveral branches. They do not make fpirits on the fugar eftates. The melaffes is fent for fale to Batavia, where one diftillery may purchafe the produce of an hundred eltates. Here is a vaft laving and reduftion of the price of fpirits ; not as in the Weft Indies, a diftillery, for each eftate ; many cen¬ tre in one, and arrack is fold at Batavia from 2 I to 25 nx- dollars per leaguer of 160 gallons; fay 8 d^w gallon. ^ The Sugar Maple, (the acer faccharinum of Linnaeus), Deft tip as well as the fugar-cane, produces a great quantity of fugar. This tree grows in great numbers in the weftern counties ^ of all the middle ftates of the American union. Thofe which grow in New York and Pennfylvania yield the fugar in a greater quantity than thofe which grow on the waters of Ohio—Thefe trees are generally found mixed with the beech, hemlock, white and water afh, the cucumber-tree, linden, afpen, butter nut, and wild cherry trees. They fometimes appear in groves covering five or fix acres in a body, but they are more commonly interfperfed with fome or all of the foreft trees which have been mentioned. From ■TmnjS 30 to 50 trees are generally found upon an acre of ground. They grow only in the richeft foils, and frequently in ftony^"“ ground. Springs of the pureft water abound in their neigh-F^^, bourhood. Theysare, when fully grown, as tail as the white and black oaks, and from two to three feet in diameter. They put forth a beautiful white bloffom in the fpring be¬ fore they fhow a fingle leaf. The colour of the bloffom diftinguilhes them from the acer rubrqm, or the common maple, which affords a bloffom of a red colour. The wood of the fugar maple-tree is extremely inflammable, and is pre¬ ferred upon that account by hunters and furveyors for fire¬ wood. Its fmall branches are fo much impregnated with fugar as to afford fupport to the cattle, horfes, and fheep ^ oAhe firft fettlers, during the winter, before they are able to cultivate forage for that purpofe. Its afhes afford a great quantity of potafh, exceeded by few, or perhaps by none, of the trees that grow in the woods of the United States. The tree is fuppoied to arrive at its full growth in the woods in twenty years. It is not injured by tapping ; on the contrary, the oftener™^: it is tapped, the more fyrup is obtained from it. In this| is tapp refpedf it follows a law of animal fecretion. A fingle tree^j mii! had not only furvived, but flourifhed after forty-two tappings fyrup i> in the fame number of years. The effey'hCICai fugar maple-tree into a garden, or by defraying fuch other ture. ^ trees as belter it from the rays of the fun, the quantity of the fap mi'ht be increafed, and its quality much improved. A farmer in Northampton county, in the ftate 0: Pennfylvania, planted a number of thefe trees above twenty years ago in c| his meadow, from three gallons of the fap of which he ob¬ tains every year a pound of fugar. It was obferved former¬ ly, that it required live or fix gallons of the fap of the trees jo which grow inthe woods toproduce the famequantity of fugar. The fap di- The fap diftils from the wood of the tree. Trees which lie wood ^aVC keen cut ^own *n t^e w*nter for the fupportof the do- n the>0 meh’c animals of the new fettlers, yield a confiderable quan¬ tity of fap as loon as their trunk? and limbs feel the rays of the fun in the fpring of the year. It is in confequence of the fap of thefe trees being equally diffufed through every part of them, that they live three years after they are girdled, that is, after a circular incifion is made through the bark into the fubftance of the tree for the purpofe of de- ftroying it. It is remarkable that grafs thrives better under this tree in a meadow, than in fituations expofed to the con- ftant adfion of the fun. The feafon for tapping the trees is in hebruary, March, and April, according to the weather which occurs in thefe months. increaftd Warm days and frefty nights are moil favourable to a y warm plentiful difcharge of fap. 1 he quantity obtained in a day from a tree is from five gallons to a pint, according to the greater or lefs heat of the air. Mr Lowe informed Arthur Noble, Efq; that he obtained near three and twenty gallons ol fap in one day (April 14. 1789.) from the Tingle tree which was before mentioned. Such inftanees of a profu- fion of fap in lingle trees are however not very common. 1 here is always a fulpenfion of the difcharge of fap in the f from the n5llt if -a fu?Ceed a warm The perforation in cc. trce 13 mac^e with an axe or an auger. The latter is piefened from experience of its advantages. I he auger is introduced about three quarters of an inch, and in an afeend- ing direction (that the fap may not be frozen in a flow cur¬ rent in the mornings or evenings), and is afterwards deepen¬ ed gradually to the extent of two inches. A fpout is in¬ troduced about half an inch into the hole made by this auger, and projedls from three to twelve inches from the tr- fyout is generally made of the fumach or elder, which ufually grows in the neighbourhood of the fiumr 5i ays ami ofty ights. 5* ow the tii . r* n ***'■' * O' x cut**, w ii e tree is -mfl; tapped on the fouth fide ; when the Jerufalem to announce. trees. difcharge of its fap begins to leffen, an opening is made on the north fide, from which an increafed dilcharge takes place. The fap flows from four to fix weeks, according to the temperature of the weather. Troughs l?rge enough to contain three or four gallons made of white pine, or white afh, or of dried water afh, afpen, linden, poplar, or common maple, _ are placed under the fpout to receive the fap, which is earned every day to a large receiver, made of either of the trees before mentioned. From this receiver it 53 ss conveyed, after being ftrained, to the boiler reduced We underftand that there are three modes* of reducing r jar by the fap to fugar ; by evaporation, by freezing, and by boif- jJes. g ’ . • Which the latter 13 moft g^eral, as being the molt expeditious. We are farther affured, that the profit of the agreeable6 ^ iT 10 hs lugar* Jt afford3 moft geeable melaffes, and an excellent vinegar. The fap ' nch is fuitable for thefc purpofes is obtained after the fap melaffes may be made to compofe the bafis of a plea- fant fummer beer. The fap of the maple is moreover ca¬ pable of affording a fpirit; but we hope this precious juice will never be proftituted to this ignoble purpofe. Should the ufe of fugar in diet become more general in this coun¬ try (fays Dr Rufh), it may tend to lefien the inclination or fuppofed necefitty for fpirits, for I have obferved a rehfh for fugar in diet to be feldqm accompanied by a love for ftrong drink. J4 There are feveral other vegetables raifed in our own Sugar pro- countiy which afford fugar; as beet-roots, fldrrets, parfneps, - potatoes, ecleri, rcd-cabbage ftalks, the young flioots of in- vegeubieL dian wheat. The fugar is moft readily obtained from thefe, by making a tindlure of the fubjeft in rectified fpirit of wine ; which, when faturated by heat, will depofitthe fugar upon {landing in the cold. Suga r of Milk. See Sugar of Milk. Jlculof Sugar. See ChemisiKY-Index. SUGILLATION, in medicine, an extravafation of blood in the coats of the eye, which at firft appears of a red- diftr colour, and afterwards livid or black. If the diforder is great, bleeding and purging are proper, as are alio difeutients. SUICIDE, the crime ol felf-murder, or the perfon who commits it. We have often wifhed to fee a hiftory of crimes drawn up by a man of ability and refearch. In this hiilory we would propofe that the author fhould deferibe the crimes pe¬ culiar to different nations in the different llages of fociety, and the changes which they undergo in the progrefs of ci¬ vilization. Alter having arranged the hiftorical faefts, he might, by comparing them with the religion and the know¬ ledge of the people, deduce fome important general conclu- fions, which would lead to a difeovery of the caufe of crimes* and of the remedy moft proper to be applied. Some crimes are peculiar to certain ftages of fociety, iome to cer¬ tain nations, &c. Suicide is one of thofe crimes which we are led to believe Suicide not common among favage nations. The firft inftances of among, the¬ ft recorded in the Jewifti hiftory are thofe of Saul and Ahi-Jews’ tophelfor we do not think the death of Samfon a proper example. We have no realon to fuppofe that it became common among the Jews till their wars with the Romans, when multitudes flaughtered themfelves >hat they might not fall alive into the hands of their enemies. But at this oe- riod the Jews were a moft defperate and abandoned race" of men, had corrupted the religion of their fathers, and rejeft- ed that pure fyftem which their promifed Meffiah came to When it became remarkable among the Greeks, we have Among th? not been able to difeover ; but it was forbidden by Pytha-Greeks, goras, as we learn from Athemeus, by Socrates and Ariftotle, and by the Theban and> Athenian laws. In the earlieft ages of the Roman republic it was feldom committed ; but when luxury and the Epicurean and Stoical philofophy had- corrupted the fimplicity and virtue of the Roman chara&er, then they began to feek fhelter in fuieide from their misfor¬ tunes or the effects of their own vices. The religious principles of the bramins of India led them The Bra. to admire fuicide on particular occafions as honourable, mms and Accuflomed to abftinence, mortification, and the contemptGe,lt00SK of death, they confidered it as a mark of wCaknefs ol mind to fubmit to the infirmities of old age. We are-informed that the modern Gentoos, who frill in moft things coiriorrn to the cufloms of their anceftors, when old and infirm; are frequently brought to the banks of rivers* particularly to< thofs. fMcMt. Still linhertfori tdmerica. S U I ' £ I t, , . t^ofe of the Ganges, that they may die in its facred ftreams, “ father of Hang iter which they believe can wafh away the guilt of their fins. , But the maxims of the bramins, which have encouraged TUlRhap. thjs practice, we are aflured by Mr Holwell, are a corrup- voL »• tion 0f the doarines of the Shaftah, which pofitively forbid JItlivell's filicide under the fevereft punifhment. The practice which Jnterefling religion or affeaion has eftablifhed among the Gentoos tor Events, &c.wol"en at the death of their huibands to burn themfelves ,cl" u alive on the funeral pile, we do not think ought to he con. fidered as fuicide, as we are not anxious to extend the mean- ing of the word; for were we to extend it thus far, it would be as proper to apply it to thofe who choofe rather to die in battle than make their efcape at the expence of their ho¬ nour. Thus we fhould condemn as filicides the brave Spar¬ tans who died at Thermopylae in defence of their country : we fhould alfo be obliged to apply the fame difgraceful epi¬ thet to all thofe well-meaning but weak-minded Chriftians in this ifland, who in the laft centuiy chofe rather to die as martyrs than comply with commands which were not mo¬ rally wrong. According to the Gentoo laws, “ it is proper for a woman after her hufband’s death to burn herfelf in the fire with his corple. Every woman who thus burns fhall remain in paradife with her hufband three crote and fifty lacks of years. If file cannot, fhe mull, in that calc preferve an inviolable chaftity. If fhe remain chaile, fire goes to paradife ; and if fhe do not preferve her chaility, fhe 4 goes to hell.” Among the A cuftom fimilar to this prevailed among many nations Americans. on the contJnent of America. When a chief died, a cer¬ tain number of his wives, of his favourites, and of his flaves, were put to death, and interred together with him, that he might appear with the fame dignity in his future ftation, and be waited upon by the fame attendants. This pei fua- fion is fo deeply rooted, that many of their retainers offer themfelves as vidims; and the fame cuftom prevails in many of the negro nations in Africa. If we can believe the hiftorians of Japan, voluntary death is common in that empire. The devotees of the idol A- mida drown themfelves in his prefence, attended by their re¬ lations and friends, and feveral of the priefts, who all con- fidei the devoted perfon as a faint who is gone to everlaft- ing happinefs. Such being the fuppofed honours appio- --j—j ~j priated to a voluntary death, it is not furprifing that the Ja- itheEafiand panefe anxioufly cherifh a contempt of life. Accordingly Wj/l lialies,-s a part of tl)e e(iucation Gf their children “ to repeat poems in which the virtues of their anceftors are celebrated, an utter contempt of life is inculcated, and fuicide is fet up &s the moft heroic of a&ions.” A notion feems alfo to have prevailed among the an¬ cient Scythian tribes, that it was pufillanimous and ig¬ noble for a man whofe ftrength was wafted with difeafe or infirmity, fo as to be ufelefs to the community, to con¬ tinue to live. It was reckoned an heroic a&ion volun¬ tarily to feek that death which he had not the good for¬ tune to meet in the field of battle. Perverfion of moral feeling does not fpring up, we hope, fpontaneoufly in any nation, but is produced by fome peculiarities of fituation. A wandering people like the Scythians, who roamed about from place to place, might often find it impofiible to attend the fick, or to fupply from their precarious ftore the wants ©f the aged and infirm. The aged and infirm themfelves, no longer able to fupport the chara&er of warr iors, would find themfelves unhappy. In this way the pra&ice of putting to death fuch perfons as were ufelefs to the community might originate, and afterwards be inculcated as honourable ; but he who put an end to his infirmities by his owu hand, ob¬ tained a charafter ftill more illuftrious. The tribes of Scandinavia, which worfhipped Odin the The Japa- ficfe, and jRaynaP t Jfi/lory of 6 Scythians,, S U I - khuv w* were taught, that dying hi the field of Suie’d*, battle was the moft glorious event that could befal them, This was a maxim fuited to' a warlike nation. In order to And7San> eftablifh it more firmly in the mind, all were excluded iromdmavhaj, Odin’s feafi of heroes who died a natural death. In Afgar- dia flood the hall of Odin ; where, feated on a throne, he received the fouls of his departed heroes. This place was called Valhalla, fignifying “ the hall of thofe who died by violence,” Natural death being thus deemed inglorious, and punifhed with exclufion from Valhalla the paradife of Odin, he who could not enjoy death in the field of battle was led to feek it by his own hands when ficknefs or old age began to aTail him. In fuch a nation fuicide muft have been very common. _ 1 ^ ® As fuicide prevailed much in the decline of the Roman * prevail, empire, when luxury, licentioufnefs, profligacy, and phtlofophy, pervaded the world, fo it continued to prevailof the^ even after Chriftianity was eftablifhed. The Romans, when man em. they became converts to Chriftianity, did not renounce theirpuc. ancient prejudices and falfe opinions, but blended them with the new religion which they embraced. The Gothic na¬ tions alfo, who fubverted the Roman empire, while they re¬ ceived the Chriftian religion, adhered to many of their for¬ mer opinions and manners. Among other criminal pra&ices which were retained by the Romans and their conquerors, that of fuicide was one ; but the principles from which it proceeded were explained, fo as to appear more agreeable to the new fyftem which They had efpoufed. It was com¬ mitted, either to fecure from the danger of apoftacy, to procure the honour of martyrdom, or to preferve the crown " of virginity. 9 When we defeend to modern times, we lament to find foToocom. many inftances of fuicide among the moft polifhed nations, who have the belt opportunities of knowing the atrocity of that un-^j't not natural crime. The Englifh have long been reproached by fo-mo:e(oi reigners for the frequent commiffion of it; and the “ gloomy E'lgM month of November” has been ftigmatized as the feafon1^^ when it is moft common. But this difgraceful imputation, we think, may be juftly attributed, not to the greater fre¬ quency of the crime in England than in other places, but to the cuftom of publifhing in the newfpapers every inftance of fuicide which is known. Mr Moore, who lately publifh- ed a full inquiry into this fubjeft, was at great pains to ob¬ tain accurate information concerning the perpetration of this crime in different countries. Mercier, who wrote in 1782, pA fays, that the annual number of filicides in Paris was then 10 about 150. He does not tell us how he came by the in-Thertf formation ; but we have the authority of the Abbe Fonta-^jf1' na for afferting, that more perfons put an end to their lives^ Lo: in Paris than in London. The Abbe had this information from the lieutenant of the police. Mr Moore was informed' eva,^ by one of the principal magiftrates of Geneva, that in thatacc®^ ~ j--o * * - _ _7 to the^ city, which contains about 25,000 inhabitants, the average. number of filicides is about eight, The average number of filicides, from what caufe foever, for the laft 28 years, lias been 32 each year for London, Southwark, and Weftmin- fler. In Edinburgh, which contains 80,000 inhabitants, we are convinced the average number of filicides does not exceed four. Mr Moore found, from the accounts with which he was favoured by the feveral coroners of the coun¬ ty of Kent, that for the laft. 18 years the number has been upwards of 32 each year. Kent is fuppofed to contain 2oo,qoo inhabitants, and London 800,000. It is eafy therefore to fee, that in the metropolis many inftances of fuicide muft occur which are never the fubjeft of legal in¬ quiry, and confequently never made known to the world. Whereas in the country towns and villages of Kent it is fcarcely poflible to conceal fuch an adioa as felf-murder from .accost Suicide. S U I [ 65 1 S U I from the knowledge of the whole neighbourhood. The cal- Among the moral caufes which are fuppofed to co ope- Suicde — iro..*. <.— |n proc)nCing fuicide in Britain, the freedom of our con- it In what rank and fituation fuicide is moft com mon. T» Phyfical paufes to :W hich it fiat, been jferibed in Britain. JWoore's Full In¬ quiry into tie Caufes of Suicide. culation therefore refpeciing Kent we may receive as true, while we muit increaie the average number in London very confiderably. Mr Moore computes the average number of filicides in England every year at a thoufand; but the prin¬ ciples on which he founds this opinion are fo imperfedt and vague, that we do not think it can be depended on as co¬ ming near the truth. It might lead to fome interefting conclufions to compare together, not only the number of filicides in different coun¬ tries, but alfo the rank and principles, the fex and age, of i- thofe unhappy perfons by whom it has been committed. Mercier fays, that at Paris it was the lower ranks who were moft commonly guilty of it; that it was moRly committed in garrets or hired lodgings ; and that it proceeded from po¬ verty and oppteffion. A great many, he fays, wrote letters to the magiftrates before their death. Mr Moore’s corre- fpondent from Geneva informed him, that from the year 1777 to 17S7 more than too filicides were committed in Geneva; that two-thirds of thefe unfortunate perfons were men ; that few of the clerical order have been kr^wn to commit it; and that it is not fo much the end of an im¬ moral, irreligious, difiipated life, as the effedt of melancholy and poverty. By the information obtained from the coro¬ ners of Kent, it appears, that of the 32, three-fourths have 11 —ii’ ina iwivc vapauic ui managing ms woraiy anairs, or maxing a vviil, e royed themfelves by hanging ; that the proportion of and of difpofing of his property, immediately before his males to femJllpR Vine v.-w* ^ ~ „ f~4. ^ — L ^ C J . ..rii* r i 1 rate in producing fuicide in Britain, the freedom o llitution and laws is reckoned one. That rational liber-^!K, 1,uoraj ty fhould have any tendency to encourage crimes of anyCa«i*es. kind, a Chriltian philofopher can never allow ; for fuch an opinion is totally difcountenanced by enlightened views of nature. Mercier has aferibed the frequency of fuicide in " Paris to the opprefiion of the late government. Now it ap¬ pears fomewhat extraordinary, that fuicide 111 one country fhould be occalioned by liberty, and in another by the want of it. One of thefe opinions mull be falfe, and it is furely not difficult to diftinguilh ■which. ,, Humanity would in moft cafes difpofe us to 1o conclude, Not owing that fuicide is the effedl ofinfanity, were there not fo rnanyalwajs to inllances of cool deliberate felf-murder. That filicide is an II^aait) » unnatural crime, which none but a madman would commit, compaffion indeed may fuppofe : but the murder of a wife, a lather, or a child, are alio unnatural; yet compaffion does not teach us in all cafes to aferibe fuch a crime to madnefs. Paffion may often arife to fuch a height of outrage as to be fcarcely diftnguilhable from madnefs in its fymptoms and its effedfs ; yet we always make a diftindtion between that madnefs which arifes from difeafe and that which is owing to a violent perturbation of mind. If a perfon be capable of managing his wordly affairs, of making a will. males to females has been about two-thirds of the former; that no one feafon of the year is more diftinguilhed for this crime than another ; and that filicide is upon the increafe. Our accounts refpedting the city of London are very im- jperfedt ; but we think ourfelves intitled to conclude, that filicide is more common among the great and wealthy than among the lower ranks, and that it is ufually the effea of gaming and diflipation. Thofe who have inquired into the caufes of fuicide in Britain have enumerated many phyfical as well as moral caufes. f hey have aferibed it to the variablenefs of our cli¬ mate, to the great ufe of animal food, to ftrong fpirituous liquors, to tea, and to the fulphuveous exhalations of the pn-coal ufed as fuel, which are faid to produce a depreffion of (pints and nervous affedtions. OF our climate, we have no caufe to complain, nor have we any' reafon to impute any of our vices to its influence. 1 'here are many climates much more unfavourable where fuicide is fcarcely known. That an exccffive quantity of grofs animal food, or offtron^ liquors, or of tea, will powerfully affedl the human conftt tution, we wall not deny : but before we confider thefe as caufes, it muft firft be determined, whether thofe who are guilty of felf-murder be much addi&ed to them ; and if they are, whether there be not other caufes much more violent in their nature which have operated on their mind; for we ought not rafhly to attribute vicious effedis to any of thofe things which feem to have been created on purpofe for the com on or convenience of man. We are rather furprifed to find that coal isfnentioned even as a diftant caufe of fuicide- lor it is one of the bleffings of our ifland : and a good coal death, or after he formed the refolution of dying by his own hands, fuch a man is not to be conlidered aa in¬ fane. But though a regard for truth prevents us from aferibing But often filicide in all cafes to infankyr, we muft aferibe it either toahbto vi- infanity or to vicious paffion. Thefe two divifions, wtP0118 Pa‘~ imagine, will comprehend every fpecies of it, whether ari-Uon' fmg from melancholy, tedium ’vita or ennui, difappointment in ichemes of ambition or love, pride, gaming, or a dtfire to avoid the fliame of a public execution ; paffions which are of¬ ten increafed by falfe views of God, of man, and of a future ftate, arifing from deifm and infidelity. If thefe be the caufes of fuicidc in modern time, what a diigracefiil contrail do they form to thofe principles which aftuated many of the ancient philofophers,theGentoos,the Japanefe, and theworflrippers of Odin? When they committed fuicide, they committed it from principle, from a belief of its lawfulnefs, and the hope of be¬ ing rewarded for what they judged an honourable facrifice. But in modern times, we are forry to fay, when it is not the eflfedl of madnefs, it is the eflfedl of vice : and when it is the effeft of vice, it proves that the vicious paffions are then indulged to the highefl degree ; for there is no crime which a man can commit that is fo flrong a fympton of the vio¬ lence of particular paffions. It is from" not attending to this cucumftance, that it has been found lo difficult to refute the arguments in favour of fuicide. If the criminality of fui¬ cide be confined merely to the violent a&ion, many apologies may be made for it ; but if it be confidered folely as the eflTev_t of vice, as the llrongefl fymptom of tingoverned paf- iion, he who undertakes its defence muft. undertake the de¬ fire we have alwavs -nrV, T “uu a Soocl coal 1,on> ne who undertakes its defence muft undt than lotlem t0 ^ fPlrit8 ^ ^ aU men willlou% -ndemn (a). Vol. XVIII. Part J. “ 19 unnece^aiT to enter particularly into the argu- I ments nus with the following fpeech, when he had loftV ^ ^ ^ the atrocity of filicide. Quintus Curtms introduces Da- fate: you wonder, perhaps that Idn ^ f ■ hlS emp're : “ 1 Wa,t ^fays the “^tunate monarch) the iflTue of my than by my own. P P ’ 1 terrainate my own life ; but I choofe rather to die by the crime of another from Fitzolborn^s^tters*^** Pam^Derfiiaft0^ prefcn^.nS .t0 our readcrf the following beautiful pafiage upon this fubjeft principle of mere vanity ' It is efte me 1 as (fayS tlhlS;k^nt -nter) this difguft of life is frequendy indulged out of a* r ctf r 7- t emtd as a mark of uncommon refinement, and as placing a man above the ordinary iv,Lmcr level Suicide. S U I [ ments of tWe cafmfls who have undertaken the defpicable office of advocates for the crime of fuieick. 1 heir tale,ns might furely have been employed more uferudy to the wor , farV to tn- and more honourably to themfelves, than m pleading .or a ter int') the crime which, if it were committed by every man to whom arguments their principles would make it lawful, would totally dettioy forne of the nobleft virtues, fortitude, patience, anf religna- tion ; nay, would deftroy fociety itfelf, and teach us to 16 Unnecef- fary to en of cafu'fts upon this fubjedt. 6^5 1 S U 1 ,, r thek tortures than he won in the battle ,of Cannae ; for to Suicide, die innocently and heroically is the greateft exertion of hu- —-y- m Asffiicidtwas deemed a crime by the moft iUuftrious andH™ F- virtuous of the Greek and Roman philoiophers, it was con-d e Gte^k fidered as a crime by the laws, and treated with ignomt-CeailS)&( ny. By the law of Thebes fuicides were to have no ho¬ nours paid to their memory f. The Athenian law oj-dain- fPetitiCm tio*R ; nay, would dUfoy focfetr itfelf, and teach m to the d£ed t0 be c„t off, and defpife the opinion that this y/ond is a ilate of PrtA ‘. b d t from the reft of the body. The body was not for another. “ I came ,nto l.fe w.thout my own confent, ^ ^ . rntomw_ but was itnommioull. merit, in Leges /ith ior anouxci. * - „p.r rnr. u.irmn Ann the ufual folemnities, but was ignommioufl-yc and may I not quit it at pleafure . _(lay tae aavoc‘ th-own into fame pit. In Cea and Maffilia (the ancient Mar- fuicide). If, becaufe we came into kfe without our own con rwaa confidered as a crime againil the ftate ; and it fent, we might quit-it at p|eafure, why may vv. n° p. / ’ f neceffary for thofe who wiffied to deftroy '7 Its great denee. our life alfo as we pleafe ? Why may we not rob and murder, and commit every kind of crime, it tnere indination is to be the rule of adion ? Thus upon the principles of filicide the h’gliwayman and murderer may reafon, and tyei y man may find a fufficient apology tor any crime which he is tempted to commit. Or this abfurdity may be otherwile anfwered ; As we came into life without our own confent, we muft have come with the confent of feme other being ; and logic fays, that with the confent of that Being only can we lawfully quit it. „ . ., . It is fufficient fhortly to fay, that fmcide is contrary to ; the ftromreft principle of the human conftitution, ied-pre- '-fervation'; that it is rebellion againft God; that it is cruel¬ ty to the feelings and reputation, and often takes away the fubfiftence of a wife, a child, or a father ; that it proves a want of fortitude to brave misfortunes; that it delivers only from imagined to plunge into real evils. We may add, that almoft every inftance of filicide of which we have heard was raft), imprudent, and premature, interrupted a ufeful life, or prevented a more honourable death. Gad Ca fity "was therefore neceffary for thofe who wiffied to deftroy themfelves to obtain permiffion from the ma Tifrates. ^ I5jii taich acquaints us, that an unaccountable paffion for fm- on thl n cide feized the Milefian virgins; from indulging which '/(t thev could not be prevented by the tears and entreaties of^- parents and friends : but what perfuahon and entreaty could ^ not effeTc was accomplifhed by very different means. A decree was iffued, “ that the body of every young woman who hanged herfelf ffiould be dragged naked through the flreets by the fame rone with which (he had committed the deed.” ' This wife edidt put a complete ftop.tei the extraor¬ dinary frenzy, and filicide was no longer committed by the virgins of Miletus. . , r T9 In the early part of the Roman hiftory there kerns to By the ! have been feldom occaiion for framing any law - againft fur- Romar cide, rJ he only^inftar.ce recorded occurs in the reign.ol Tarquinius Frifcus. The foldiers who were appointed to make drains and common fewers, thinking themieh.es dit- graced by inch fervile offices, put themfelves to death in great numbers. The king ordered the bodies or ad tn-. ivi,- § Phltnrc /o’s piftde^eankte'd him to yield'himfeff to the genero- murderers to be expofed on croffes, and this put an effec oiclfthL chlaer andkis influence might have con. ,ual iloo to the pva6t.ee. It .a doubttul whether there waa / 5 ri* 'inxr •ftntpritnrr mW a 0*^1 111 it tributed to retard the flavery of his country, which his death tended to haften. Had Brutus and Caffius not exe¬ cuted the fatal refolution which they had formed, of dying lay their own hands in cafe of misfortune, the battle of Philippi might have had a very different iftue. Had Han¬ nibal iuirendered himfelf to the Romans, inllead of fwallow- ing poifon, he would have gained more glory in braving any ftanding law againft fuicide during the exiitenee ci the republic ; but during the reign ok the emperors it was thought proper to lay it under certain regulations, though not abfolutely to condemn it as a crime. In Juftinian’s Di- L:b gefts there is a law, by which it was enaifted, e vel concedere.,, Of the former nature are all adtions upon debt or promifes ; of the latter are all adlions of trefpaffes, nuifances, affaults, de¬ famatory words, and the like. Real actions (or, as they are called in the Mirror, feodal atlionsf which concern real property only, are fuch where¬ by the plaintiff, here called the demandant, claims title to have any lands or tenements, rents, commons, or other hereditaments, in fee-iimple, fee-tail, or for term of life. By thefe actions formerly all difputes concerning real eftates weie decided; but they are now pretty generally laid afide in practice, upon account of the great nicety re¬ quired in their management, and the inconvenient length or their procefs; a much more expeditious method of try¬ ing titles being fince introduced, by other addons petional and mixed. Mixed adtions are fuits partaking of the mixture of the other two, wherein fome real property is demanded, and alfo perfonal damages for a wrong fuitained. As for in- fiance, an adtion of wafte: which is brought by him who hath the inheritance, in remainder or reverfion, againft the tenant for life, who hath committed wafte therein, "to recover not only the land wafted, which would make it merely a •real adtion ; but alfo treble damages, in purfuance of the fiatute of Gloucefter, which is a perfonal recompenfe ; and fo both, being joined together, denominate it a mixed atlion, 1 2 The Kirovan i Jvl inera- Hy- SUL The orderly parts of a fait are thefe: writ. 2. The procefs. The pleadings. 4. I he 01 % demurrer. 5. The trial 6. The judgment( and its >ncl¬ ients. 7. The proceedings m nature of appeals, b. ine execution. See thefe articles. SULLY. See Bethune. _ SULPHAT, in the' new chemical nomenclature, de¬ notes a compound of the fulphurie acid with iome other jubilance. , . . . n SULPHUR, a well known fubilance, which is yellow, tallelefs, hard, brittle, and when rubbed becomes elednc. Its fpecii'tc gravity is from 1,9 to 2,35. According to Bergman, it gently evaporates at 17c, melts at 185, and ■ flames at 302'of Fahrenheit. It burns with a blue flame, and a difagreeable fuffocating fmell ; in dole veflclo it su¬ blimes without decompoiition, or only a decompciition pio- portionable to the quantity of air they contain ; when med- ed it becomes red, but recovers, its colour on cooling. H is infoiuble in water, though by long trituration it is laid water will take up iome of it, but it is rather diffuled than diflblved in it ; neither can i'pirit of wine unite to it, except when both are in a vaporous ftate, and then 72 parts ot fpirit of wine take up 1 of fulphur ; it is foluble in hot oils, and alfo in fixed alkalis, both in the dry and liquid way • [ 68 ] SUL The original fome of the metallic ores in this country abound with it; ^ but from die common mode of purifying them, the fulphur is diffipated and loft. Dr Watfon has ihown, m a paper on lead-ore in the Philofophical Tranfadions, that not lefs than 700 tons are. annually diffipated in the various lead-mines ot England. It is extraded from pyrites in the following manner in Saxony and Bohemia. The pyrites is put in tmall pieces into earthen tubes : one of the tubes is placed on a fur¬ nace, and the other paffies into a fquare veifel of caft iron containing' water. ri he fulphur is difumted by the heat from the pyrites, and paifes into the veffcl 3 but it is then very impure. It is afterwards melted in an iron ladle, when the earthy and metallic particles are depofited by their weight, and the fulphur being light riles to the top. It is then poured off into a copper boiler, where it is farther pu¬ rified*, and afterwards poured into cylindrical moulds of wood, from which it receives the ihape in which it is uiually fold. When melted fulphur is gently heated, it flies off m a yellow powder, which is calledJlowers of fulphur. T. he ope¬ ration is performed in this manner : Common fulphur in powder is put into an earthen cucurbit, to the top of which a number of earthen pots inferred in one another is fixed, known by the name of aludels. The cucurbit is then heat- Sul phnr ■: concentrata! nil™ acid’, ed tiU th. fuhj.* becon* l^d : it .hen rifea and attaches partly decompofed and partly diffolved by the vitriolic and itldf to the Tides ot the aludels. - - - - J'nurct 0\ . Cbe/ftijiry, oxygenated muriatic acid. See Chemis tR.Y-/«ub.v. Sulphur was formerly fuppofed to confift. of fulphuric acid and phlogifton, in the proportion of 60 parts of the former to 40 of' the latter ; but by the new fyftetn which is now generally adopted, fulphur is reckoned a fimple fubilauct, and the fulphuric acid a compound of fulphur and oxygene or vital air. This conclufron is founded on the following faffs : x. Sulphur does not burn unlefs vital air have accefs to it. 2. During corabuflion it abforbs vital air from the atmofphere. 3. The fulphuric produced by the combuftion of iulphur is equal in weight to the fulphur employed and the quantity of air that has been confumed.- Sulphur is found fometimes pure, and fometimes in com¬ bination with other fubftances. Ot' pure fulphur there are feven varieties. 1. Tranfparent fulphur, in eight-fided cty- ftals, with two truncated pyramids. It is generally depo- iited by water on the furface of calcareous fpar. Cadiz fulphur is of this kind. 2. Tranfparent fulphur in irregular fragments. Such is the fulphur of Switzerland. 3' Whi- tifh pulverulent fulphur, depoiVted in hliceous geodes. In Franche Comptc there are flints full of fulphur, 4. Pul¬ verulent fulphur depofited on the furface of mineral waters, fuch as thofe of Aix-la-Chapclle. 5. Cryftalline fulphur that has been fublimed, found in the neighbourhood of volcanoes. 6. Pulverulent fulphur fublimed from volcanoes, found in abundance at Solfatara in the vicinity of Naples?. 7. Sulphur in ftalaftites, formed by volcanic fires. Sulphur is alfo found united with different iubftances, as with metals, when it is called pyrites ; a ihort account of which may be feen under the article Pyrites. Sometimes it is combined with calcareous earth, as in fetid calcareous jlo'neg and fwine-ftone. It has lately been difeovered, that fulphur is formed by a natural procefs in animals and vege¬ tables beginning to putrefy. It is found on liable-walls and in privies. It is alfo extrafted from vegetables, from dock-root, cochlearia, See. M. Deyeux obtained it from the white of eggs. It has been alfo procured from horie- dung. The fulphur ufed in Great Britain is generally brought in a pure ftate from volcanic countries, where it abounds in an krexhauflible quantity. It is well known, however, that Sulphur combined with an alkali is called hepar fulphurisy liver of fulphur, becaufe it refembles in colour the liver of animals. In the French nomenclature it is called fulphure, and by thofe Britiih chemifts who have adopted the new fyf- tem fi/phuret. Water decompofes the fulphuret. The fulphur is preci¬ pitated by acids, when a particular gas is extricated com¬ monly called hepatic gas, or, what is more exprellive oi its compofition, fulphurated hydrogenous gas. The fetor oi this gas is infufferable,' and is fatal to animals. It communicates a green colour to fyrup of violets, and burns with a light- blue flame. It adts on metals and metallic oxides, efpeebi- ly thofe oflead and bifmuth, which it foon blackens. It is decompofed by vital air ; and accordingly, when it comes into contadl with atmofphei ic air, a portion of the iulphur is ieparated. For this n-uon fulphureous waters do not, contain genuine liver of fulphur. The mineral acids adl differently on fulphur. If the ful- phurie acid be boiled on fulphur, the acid acquires an am¬ ber colour, and a fulphurepus Imell; the fulphur melts and fwims like oil. When cooled, it concretes into globules of a greenifh hue ; but a fmall portion or the fulphur is ddfol- ved in the acid, which may be precipitated by an alxali. The flaming red nitrous acid adls powerfully on iulphur. When poured upon melted fulphur, it oecahons detonation and inflammation. The common muriatic acid produces no effeift. upon it ; but the oxygenated muriatic acid a£ls upon it with force. Sulphur unites readily with all metallic fubftances, ex¬ cepting gold, platina, and zinc ; at lead wre have not found the means of uniting it with ttiefe diredlly, and without fome intermediate jubilance. The degrees of affinity with which fulphur combines with thole metals to which it may be readily united arc different ; for it not only unites more eafily and abundantly with fome than with others, but it aifo quits thofe wdth which it has a lefs affinity, to unite with others to which it has a ftronger affinity. The ailinities of fulphur, according to , Mr Geoffroy’s table, are, fixed alkali, iron, copper, lead, iilver, regmlus of antimony, mercury, and gold; and, according to Mr Gel- lert’s table, they are, iron, copper, tin, lead, filver, biimuth, regulus S U L u’phur. regulus of antimony, mercury, arfenic, and cobalt : gold and ’ zinc are marked in this tabic as being incapable of uniting with fulphur. The compounds formed by fulphur with different metals are different ; but all of them poffefs a metallic lultre, with¬ out any duftility : thefe combinations of fulphur and ol me tali are very frequently foiind in a natural ftate. Almolt all the metals which we dig from the earth are naturally found combined with fulphur, forming mod of the ores and metallic minerals. It is a curious phenomenon, that nitre mixed with fulphur burns rapidly) even in clofe veffcls; this is eafily explained by the new fyftem. Nitre, when heat is applied to it, yields a great quantity of vital air ; and fulphur is a combuitible body, or, which is the fame thing, has a ft rung attradtiou for vital air. As vital air is thus fupplied, which is the on¬ ly principle neceffary to combuftion, communication with the atmofpheric air is imneceffary. The fulphur will burn till the whole vital air which the nitre fur nifties be confir¬ med. The prod lift 3 obtained by this procefs are different according to the proportions of nitre and fulplurr which are employed. If eight parts of fulphur and one of nitre be let on fire in a clofe veffel, lulphuric acid is produced ; and this is the method by which oil of vitriol or ftrong fulphurie acid was formerly made in Great Britain. '1 he veffels in which the operation was performed were large glafs bal¬ loons, with very large necks, each containing goo or 500 pints. But it was attended with great expence, on account of the high price and brittlenefs of the balloons.. A few years ago a cheaper method has been attempted with fuc- cefs in b ranee. The fulphur is burned on a kind of grid¬ irons, in large apartments lined with lead. As the acid con- denfes it is conveyed by gutters into a refervoir, and after¬ wards concentrated. It mult be obferved, that the fulphu- ric acid thus obtained is always combined with a little ful- phur and fulphat of pot afh, a fmall quantity of aluminous lulphat and fulphat of lead; but thefe fubftances are in fo imall a proportion, that for common ufe it is not neceffaty to feparate them. If nectffary, however, it may eahly be done by diftilling the acid to drynefs. Oilnpowder, the terrible effefts of which are owing to its ftrong tendency to combuftion, is a mixture of fulphur, nitre, and. charcoal. (8ee Gun powder). But there is another.mixture of which fulphur is an ingredient ftill more v.o'lent in its effefts : I his is called fulminating powder, and is compofed of three parts of nitre, two parts of the carbo¬ nate ot pot-afh, and one of powdered fulphur. Thefe being clofely united together by trituration in a hot marble mortar, when expofcd to a flight degree of heat, will melt, and produce a violent detonation like the report of a cannon. A diam of this mixture Is fufficient for the experiment. Sulphur is of great ufe in chemiftry, in medicine,’and t.ie arts. Sulphur is ufe^ul in making feme fuftons, preci¬ pitations, and. reparations of metals and minerals; but is particularly ufeful, as. being the fubftance from which the fulphime acid is obtained. Hepar fulphuris is employed in chemiftry for making feveral folutions. Sulphur is employed in medicine both internally and ex¬ ternally. It .s given either in flowers or in lozenges, made up with fugar, or. joined to magnefia, cryftals of tartar, manna?.caffia, Ie!ntlve binary, &c. Two or three drams generally prove laxative ; and it is given in fuch dofes in cates or piles of uterine, and other hoemorrhagies; becaufe a difnnfT hmu ane n0rrheat durin^ lts °P«ation, nor leave refinomT ^ C,olhve"eif’1as rhubarbi aloes, and other hot mended in geSud0‘ , S;.llphur was formerly much recom- - .ended in coughs and diieafes of the breaft, but of late its virtues as a peftoral have been much doubtk When ap! r ^9 ] SUL Sultan. plied externally, it is mixed with fame unftuous fubflanee, Su>h«r as hogs lard, butter, &e. and is rubbed ou fueh parts of the " body as are affefted with eruptions. Some phyficians and chemifts, conlideiing that fulphur is infoluble in water, and capable of re ft ft nig the aftion of molt menllruums, have affirmed, that it can produce no effeft when taken internally, Angle and unaltered ; but this affer- tipn feems to be without foundation; for it is certain, that the Iweat and perlpiration of thofe who take fulphur internally have a imtll evidently fulphureous. Belides, ful¬ phur is much more foluble than is generally believed, ft is attacked by all oily and iaponaceous fubilances, and confe- quently by almoft all animal liquors. "VVe cannot eafily form a very diftinft and clear idea of the manner in which fulphur afts internally upon out bo¬ dies ; but, from obfer vat ions made upon its effefts, it ap¬ pears to be dividing, llimulating, and fomewhat heating : it principally afts upon the perfpirable parts of the body, the chief of which are the fkin and lungs ; and from this property it is particularly ufeful rn fome difeafes of thefe parts. Sulphur is alfo a powerful repellent, as appears from its cming feveral kinds of itch, merely by external application, in form, of ointments and pomatums. Several mineral wa¬ ters, which are drunk or ufed as baths for fome difeaies, owe their good qualities to lulphur contained in them. Sulphur is alio ufc-d in leveral arts. By means of it fine impreffions. of engraved Hones are .taken. Matches are formed of it and its utility as an ingredient in the prepa¬ ration of gunpowder and fireworks is well known. Laftly, it is ufed for whitening wool, lilk, and many other matters expofed to its vapour during its combuftion ; "the colours ami redntfs of which could not be deftroyed by any other fub¬ ftance, but are quickly effaced by this acid vapour.. SuLPHUk-JVorty in botany. See Peucedanum-. SULPHURIC-acid, the name adopted by the French chemifts for the vitriolic acid. It is formed by a combina¬ tion of fulphnr with vital air, as deferibed under the article Sulphur. When fulphur is binned with a low degree of heat, it burns with a blue flame, and diffufes a fuffocating vapour, which, when collefted, is called fulphureous acid. When fulphur is expoled to ftrong heat it burns rapidly, and emits a lively white flame, and lias no fmell ; the reii- dti.e is called fulpburic acid. 1 he fulphureous is a weaker acid than the fulphuric, owing to its containing a lefs quan¬ tity of oxygeue. SG-F1 ICIA, an ancient Roman poetefs, who lived un¬ der the reign of Domitian, and has been fo much admired- as to be termed the Rinnan Sappho. We have nothing, however, left of her writings but a fatire, or rather ther fragment of one, againft Domitian, who publifhed a decree for the banifhment of philofophers from Rome :. which fa- tire is to be found in Scaliger’s Appendix Virgiliana. She is. mentioned by Maitial and Sidonius Apollinans ; and is fin’d to have addreffed a poem on conjugal love to her huf- band Calenus, a Roman knight. SULFA.XUS (Severus), an ecclefiaftical writer who ' flounified about the beginning of the 5th century, and was contemporary with Rufmusand St Jerome. He was the dif- ciple of St Martin of 1 ours, whole life he has written ; and the friend of Paulinus biihop of Nola, with whom he held an intimate correfpondence. The principal of his works is his Hijloria Sacra, from the creation of the world to the confulate of Stilicho and Aurelian, about the year 400 ; in which his ftyle is elegant beyond the age he lived in. SULTAN, or Soldan, a title or appellation given to the emperor of the Turks. Vattier will have the word Turkifh, and to fignify king , of SUL t 7° 1 SUM 0/ lings ; p.dding, tliat it was fir{l given to tlie Turkifh prin- ’ ces Angrolipex and Mafgud, about the year ioj ^ . others v,-;il have it originally Teihan, alleging, in proof hereof, an ancient medal of Cofroe ; others derive it {xor<\ fo'danus, quafi folus domlnus : others from the Hebrew ^,fchalat or Jhehth, “ to rule, reign.” . It had its rife under Mahmoud, fon of Sebe&eghin, the frrft emperor of the dynafly of the Gaznevides, towards the clofe of the fourth century of the era of the Hegira : when that prince going to Segellan to reduce Ivalai governor or that province, who affedted the fovereignty, Kalaf was no fooner advertifed of his coming than he went out to meet him, delivered the keys of his fortrefs, and owned him his Mw, that is, his lord or commander. The title pleafed Mahmoud fo well, that he affumed it ever afterwards; and from him it pafled to his defeeudants, and to other Ma¬ hometan princes. It is chiefly confined to tM 1 uiKiih and Perfian monarchs. SULZER (M.), a celebrated philofopher, was born at Winter than, in the canton of Zurich, October 16. 1720. He was the youngeft of 25 children. Elis early education did not promife much, tho’ it was by no means negledled, He had little inclination for what is called in the fchool. the Rudy of humanity, and made but a fmall pregrefs in the learned languages, which were to prepare him for the Rudy of theolooy, for which profeffion his parents defigned him. At the age of 16, when he went to the academical fchool of Zurich, he had not the fmalleft notion of the fciences, or of elegant literature, and confequently no taile for fludy. The firft incident that developed a hidden germ of philofo- phical genius, was his meeting with Wolfe s Metaphyfics . this was the birth of his taRe for fcience ; but he wanted a guide. The clergyman with whom he lodged was an ig¬ norant man j and the academical prelcdxions were, as \ec, above the reach of his comprehenfion. On the other hand, a fedentary life was not the thing he liked, nor to which he had been accaRomed ; and, moreover, a fociable turn of mind led Rim often into company, wnere he loR much time in frivolous amufements, yet without corrupting his morals. Who, that obferved him at this period, fays Mr Formey in his Eulogium, would have thought that Sulzer would one day be numbered among the moR knowing and wife men of his time ? The learned Gefner was the inftrument of Pro¬ vidence that rendered Sulzer’s inclination to ftudy trium¬ phant over his pafiion for amufement and company. Ani¬ mated by the counfels and example of this vvoithy and leai li¬ ed man, he applied himfelf to philofophy and mathematics with great ardour, and refuroed the purfuit o; Cjitcian hte- rature and the Oriental languages. The contemplation of nature became his noble and favourite pafiion. An ecclefi- aflical fettlement in a rural feene, that exhibited happy ob- je&s and occafions for this delightful Rudy, began to render his days happy and ufeful; anil he publiihed, in I74l> ral Contemplations of the Works of Nature ; and the year fol¬ lowing an Sic count of a journey he had made through the Alps ; which fhowed, at the lame time, his knowledge of natural hiltory, and the tafte and fenfibllity with which he furveyed the beauties of nature, and the grandeur and good- nefs of its Author. He afterwards became private tutor to a young gentleman at Magdeburg. . Ibis procured him the acquaintance of Meflrs MaufJCrtuis, Euler, and back, which opened to his merit the path of preferment, and ad¬ vanced him fuccefiively to the place of mathematical ptofef- for in the King’s College at Berlin, in 1747, and to that of member of the Royal Academy in i75'-u In this laR quality he diftinguifhed himfelf in a very emi¬ nent manner, enriched the clafs of fpeculative philolophy with a sweat number of excellent memoirs, and was juitly ilzei I Surriatrl confidered as one of the firft-rate mctaphyficians in Germa¬ ny. But his genius was not confined to this branch of fcience. His Univerfal Theory of the Fine Arts is a valu¬ able production. A profound knowledge of the arts and fciences, and a perfect acquaintance with true taRe, are emi¬ nently dilplayed in this work, and will fecuve to its author a permanent and difti.nguilhed rank in the republic o-Tet¬ ters. The liril volume of this excellent work was publiih¬ ed in 1771, and the fecond in 1774. We lhall not here give a catalogue of the writings of 1VI. Sulzer j Out we can¬ not help mentioning his Remarks on the Philofophical EJfays of the late Mr Hume, as a work of real merit, which does juitice to the acutenefs, while it often dete&s the fophiftry, of the Eritilh Bayle." The moral char after of M. Sulzer was amiable and virtuous : fociabihty and beneficence weie its charafterulical lines ; and his Virtues were animated by that facred philofophy that forms the ChriRian, ennobles man, and is the only fource of that heart-felt ferenity and fedate fortitude which fupport humanity, when every other objeft of confidence fails. His dying moments were calm, humble, and fablime ; and when he expired, the placid and compofed air of his countenance made his mourning friends doubt, for fame time, whether it was death or deep that had fufpended his converfation. Ele had no enemy ; and his friends were numerous, alfcftionatc, and worthy ot the tender re¬ turns he made them. The king of Prufiia diRinguifhed him by repeated marks of munificence and favour. We learn, however, that his royal prote&or had never feen him before the end of the year 1777, though he had been member of the academy from the year 1750. The audience, indeed, though late vouchfafed, was honourable to M. Sulzer, with whom the monarch converfed lor a long time with the greatefi affabili¬ ty and condefeenfion. SUM, fignifies the quantity that arifes from the addi¬ tion of two or more magnitudes, numbers, or quantities to¬ gether. SUMACH, in botany. See Rhus. SUMATRA, an illaad of Aha, the mod weftern of the Sunda Iflands, and conftituting on that fide the boun¬ dary of the Saltern Archipelago. Its general direftion is nearlytnorth-weft and fouth-eatt. The equator divides it into almoft equal parts, the one •extremity being in 5. 33. N. and the other in 5. 56. S. Lat. Acheen Head, at the north extremity of the illand, is in longitude 9^. 34. eaft. It lies expofed on the fouth-weil fide to the Indian Ocean ; the north point ftretches into the bay of Bengal; to the north eaft it is divided from the peninfula of Malacca by the ftraits of that name ; to the eaft by the ftraits cl Banca, from the illand of that name ; to the fouth-eaft by the com¬ mencement of what are called the Ch'mefe Seas ; and on the fouth by the ftraits ■ of Sunda, which feparate it from the Qszettu illand of Java. It is about 900 miles in length, but from 100 to 150 only in breadth. No account had been given of this illand by any Englilhman till the year I7 7§> when Mr Charles Miller (fon of the late botanical gardener) pub¬ liihed an account of the manners of a particular diltrift, in the 68th volume of the Philofophical Tranfaftions. Thele were the Battas, a people who live in the interior parts, called the Oaf}}a Country. They differ Irom all the other inhabitants in language, manners, and cuftoms. They eat the prifoners whom they take in war, and hang up their fkulls as trophies in their houfes. He obferves, however, that human flelh is eaten by them in terrorem, and not as common food, though they prefer it to all others, and Ipeak with peculiar raptures of the foies ol the feet and palms of the hands. They expreffed much futprife that the white people did not kill, much kfs eat, their prifoners. From this SUM [7 imatra. this country the greateft part of the caffia that is fent to -v— Europe is procured. It abounds alfo with the camphire trees, which conftitute the common timber in ufe ; and in thefe trees the camphire is found native, in a concrete form. It is remarkable, that in this ftate it is fold to the Chineie at the price of 2501. or 300!, per cwt. but thefe dexterous artifts contrive to furnifh the Europeans with it at about a quarter of that price, in 1783, Mr Marfden, who had been fecretary to the prefident and council of Fort Marl¬ borough, publifhed a Hiftory of Sumatra, with very copi¬ ous particulars of the ifland. He reprefents it as furpaffed by few in the beautiful indulgences of nature. A chainof high mountains runs through its whole extent ; the ranges in many parts being double and treble ; their altitude, though great, is not fufficient to occairon their being covered with fnow during any part of the year. Between thefe ridges are extenfive plains, confrderafcly elevated above the furface ot the maritime lands. In thefe the air is cool; and from this advantage they are efteemed the mod eligible portion ot the country, are the bell inhabited, and the molt cleared from woods, which elfewhere, in general, throughout Suma¬ tra, cover both hills and valleys with an eternal {hade. Heie too are found many large and beautiful lakes, that facilitate much the communication between the different parts. The heat of the au is far from being fo intenfe as might be ex¬ pected from a country occupying the middle of the ToiVid Zone ; and it is more temperate than many regions within tne I topics ; the thermometer at the moft fultry hour, about two in the afternoon, generally fluctuating between 82 and 85 degrees. Mr Marfden divides the inhabitants into Malays, Achenefe, Battas, Lampoons, and Rejangs ; and he takes the latter as his flandard ot defeription, with refped to the perfons, manners, and cuftoms, of the inhabi- tants.. They are rather below the middle ftature ; their bulk m proportion ; their limbs for the molt part flight, but well fhaped, and particularly fmall at the wrifts and’ancles ; and,, upon the whole, they are gracefully formed. Their hair is ftrong, and of a fhining black. The men are beard- lefs. great pains being taken to render them fo when boys, by rubbing their chins with a kind of quicklime. Their complexion is properly yellow, wanting the red tinge that ] SUM conftitutes a copper or tawny colour. ^They arc in general lighter than the Meftees, or half breed, of the reft of India; thofe of the iuperior ckfs, who are not expofed to the rays t-i the fun, and particularly their women or rank, approach¬ ing to a degree of fairnefs. If beauty confifted in this one quality, tome of them would furpals our brunettes in- Eu- r< pe. The major part of the females are ugly, many of tnem even to dilguft; yet among them are feme whofe ap¬ pearance is Hrikingly beautiful, whatever compofition of pcrJon, features, and complexion, that fentiment may be the refult of. Some of the inhabitants of the hilly parts are obferved to have the fwelled neck or goitre.; but they at- nt°r\me ‘ on t e arm as our nurfes do, but flraddling on the hip, and ufually fupported by a cloth which ties in a knot on the oppofite fhoulder. The children are nurfed but little ; aie not confined by any fwathing or bandages ; and being fullered to roll about the floor, foon learn to walk and fhift for themfelves. When cradles are ufed, they fwing fufpended from the ceilings of the rooms* The Sumatrans are fo fond of cock-fighting, that a fa¬ ther on his death-bed has been known to defire his fon to take the firft opportunity of matching a cock for a fum. equal to his whole property, under a blind conviction of its being invulnerable. When a cock is killed, or runs, the other muft have fufficient fpirit and vigour left to peck at him three times on his being held up to him for that pur- pofe, or it becomes a drawn battle ; and fometimes an ex¬ perienced cocker will place the head of his vanquifhed bird in fuch an uncouth fituation as to terrify the other, and render him unable to give this proof of victory. The wild beafls of Sumatra are .tigers, elephants, rhino- cerofes, bears, and monkeys. The tigers prove to the inha¬ bitants both in their journeys and even their domeflie oc¬ cupations moft deftrudtive enemies. The number of people annually {lain by thefe rapacious tyrants of the woods is al« molt incredible. Whole villages have been depopulated by them ; yet from a fuperftitious prejudice, it is with difficulty they are prevail.d upon, by a large reward which the India Company offers, to ufe methods of deftroying them, till they have fuftained fome particular injury in their o wn family or kindred. 'I lie iize and fLength o: the fpe- cies which prevails on this bland is prodigious. They are laid to break with a ftroke of their fore paw the leg of a horie or a buffalo ; and the largeft prey they kill is without difficulty dragged by them into the woods. This they ufually perform on the fecond night, being fupnofed on the firft to gratify themfelves with lucking the blood only. Time is by this delay afforded to prepare for their deftruc- tion, either by fhooting them, or placing a veffel of water ftrongly impregnated with arfenic near the carcafe, which is faflened to a tree to prevent its being carried off. The tiger having fatiated himfelf with the flefh, is prompted to affuage his thirfl with the tempting liquor at hand, and pe- rifhes in the indulgence. Their chief fubfiftence is moft probably the unfortunate monkeys with which the woods abound. They are defciibed as alluring them to their fate by a fafeinating power, fimtlar to what has been fuppofed of the fnake ; and, fays Mr Maifden, “ I am not incredulous enough to treat the idea with contempt, having myfelf ob¬ ferved, that when an alligator or a crocodile, in a river, con es under an overhanging branch of a tree, the monkeys, in a ftate of alarm and diftraftion, crowd to the extremity, and, chattering and trembling, approach nearer and nearer to the amphibious monfler that waits to devour them as they drop, which their fright and number render almoft unavoid- able.” I hefe alligators likewife occafion the lofs of many, inhabitants, frequently deftroying the people as they bathe in the river, according to their regular cultom, and which the perpetual evidence of the rifle attending it cannot deter them from. A fuperftitious idea of their fan&ity alfo pre- ferves them from moleflation, although, with a hook of fuf¬ ficient llrength, they may betaken without much difficulty. 'I he other animals of Sumatra are buffaloes, a fmall kind of horfes, goats, hogs, deer, bullocks, and hog-deev. This laft is an. animal fomewhat larger than a labbit, the head-re- fembling that of a hog, arid its fhanks and feet like thofe of the deer. The bezoar-ftone found on this animal has been valued at 10 times its weight in gold ; it is of. a dark brown colour, fmooth on the outfide ; and the coat being taken off, it appears ftill darker, with firings running underneath the coat: it will fvvim on the top. of the water. If it be infur 3 fed Sumatra. SUM [ Sumatra. fe(l jn any liquid, it makes it extremely bitter : tlie virtues —v-~w ucua}]y attributed to this (lone are cleanfing the flomach, creating an appetite, and fweetening the blood. Of birds they have a greater variety than of bealls. The coo-ow, or Sumatran pheafant, is a bird of uncommon beau¬ ty. They have (forks of prodigious fize, parrots, dung-hill fowls, ducks, the larged cocks in the world, wood-pigeons, doves, and a great variety of (mall birds, different from ours, and diftinguilhed by the beauty of their colours. Of their reptiles, they have lizards, flying-lizards, and cameleons. The ifland fwarms with infedts, and their varieties are no lets' extraordinary than their numbers. Rice is the only grain that grows in the country ; they have fugar-canes* beans, peas, radifhes, yams, potatoes, pumkins, and feveral kinds of pot-herbs unknown to Europe ; and here are to be found mod of the fruits to be met with in other parts of the Eaft Indies, in the greateft perfection. Indigo, Brafil- wood, two fpecies of the bread-fruit tree, pepper, benjamin, coffee, and cotton, are likewife the produce of this ifland, as well as caffia and camphire mentioned above. Here alfo is the cabbage-tree and filk cotton tree ; and the forell con¬ tains a great variety of valuable fpecies of wood, as ebony, pine, fandal, eagle or aloes, teek, manchineel, and iron- wood, and alfo the banyan tree. Gold, tin, iron, copper, and lead, are found in the count'v ; and the former is lup- pofed to be as» plentiful here as in Peru or Mexico. The fineft gold and gold-duff are found in the country of Zh- movg, immediately contiguous to the prdidency of Fort Marlborough, to which the merchants repair annually for the purchafe of opium, and fuch other articles as they may be in want off, and give for them gold of fa pure a nature as to contain little or no alloy. The native indolence of ” the Alalay difpoiition prevents them from colle&ing more than is fufficient to fupply the few and Ample wants of a race of men as yet unenlightened by civilization and fai¬ ence, and ignorant o( the full extent of the advantages of the country inhabited by them. The roads leading to this golden country are almoil impervious ; affording only a fcan- ty path to a Angle traveller, where whole nights muff be parted in the open air, expofed to the malignant influence of a hoftile climate, in a country infefted by the moll fero¬ cious wild beads. Thefe are circumftances that have hi¬ therto checked curiofity ; but perfeverance and ftudied precaution will furmount the obftacles they furnifh, and fuch difeoveries might be made as would amply compenfate for th6 difficulties leading to them. The gold merchants who come from the neighbouring and lefs rich countries, give us fuch accounts of the facility of procuring gold as border nearly on the marvellous, and would be altogether incre¬ dible, if great quantities of that metal produced by them did not in fome degree evince the certainty of their accounts. This great abundance of gold in Sumatra induces Mr Marf- den to fuppofe that ifland to be the Ophir of Solomon ; a conjefture which, in his opinion, derives no Anall force from the word Ophir's being really a Malay fubffantive, of a com¬ pound (enle, Agnifying a mountain containing gold. The natives, he confefl'es, have no oral tradition on the fubjedff ; and we have elfewhere made it probable, that Ophir was A- tuated in a different quarter of the world (lee Ophir). BeAdes the metals and different fpecies of wood which we have mentioned, Sumatra produces fulphur, arfenic, falt- pet«e, and bees-wax, with edible birds-neffs, which are there commodities of great importance (fee BiRDS-Ne/ls). The Englifh and Dutch have faftories on this ifland j the principal one of the former being Eort Marlborough, on the fouth weff coaft. The original natives of Sumatra are Pagans ; but it is to be obferved, that when the Suma¬ trans, or any of the natives of the eallern Hands, learn to Afuitlc Fe fcarcbes) vol. i. 72 1 SUM read the Arabic character, and fubmit to circumcifion, they Sumtnar are faid to become Malays; the term Malay being under- 1! flood to mean Mujfulman. See Acheen. ‘‘ SUMMARY, in matters of literature. See Abridge- ment. SUMMER, the name of one of the feafons of the year, being one of the quarters when the year is divided into four quarters, or one hah when the year is divided only into two, fummer and winter. In the former cafe, fummer is the quarter during which, in northern climates, the fun is paf- Ang through the three Agns Cancer, Leo, Virgo, or from the time of the greateft declination, till the fun come to the equinoftial again, or have no declination ; which is from about the 21ft of June till about the 2zd of September. In the latter cafe, fummer contains the Ax warmer months, while the fun is on one fide of the equinoctial; and winter the other Ax months, when the fun is on the other Ade of it. It is faid that a frofty winter produces a dry fummer, and a mild winter a wet fummer. SvMMRR-IJlands. See Bermudas. Summer Red-Bird. See Muscicapa. SUMMIT, the top or vertex of any body or Agure, as of a triangle, cone, pyramid, &c. SUMMONS, in law, a citing or calling a perfon to any court, to anfwer a complaint or to give his evidence. Summons, in war. To furamon a place, is to fend a drum or trumpet to command the governor to iurrender, and to declare that if the place be taken by ftorm, all muff fubmit to the mercy of the conqueror. See Capitulation and Chamade. SUMMUM bonum, in ethics, the chief good. SUMP, in metallurgy, a round pit of (tone, lined with clay within, for the receiving the metal on its Aril fuAon from the ore. Sump, in the Britifh falt-w'orks, where fea-water is boiled into fait, is the name of a fort of pond, which is made at fomt diftance from the faltern on the fea-fhore, between full fea and low water mark. From this pond a pipe is laid, through which, when the lea is in, the water runs into a well adjoining to the faltern ; and from this well it is pump¬ ed into troughs, through which it is carried to the cilteras, in order to be ready to fupply the pans. See Salt. SUMPH, in mining, denotes a pit funk down in the bot¬ tom of the mine, to cut or prove the lode dill deeper than before ; and in order to flope and dig it away if neceffary, and alfo to drive on the lode in depth. The fumph prin¬ cipally ferves as a bafon or refervoir, to colleCt the water of a mine together, that it may be cleaned out by an engine or machine. SUMPTER-horse, is a horfe that carries proviAons and neeeffaries for a journey. SUMPTUARY laws (Leges Sumptuarhe), are laws made to reftrain excels in apparel, coftly furniture, eating, &c. Mod ages and nations have had their fumptuary laws ; and fome retain them (till, as the Venetians, &c. But it is obferved, that no laws are worfe executed than fumptuary laws. Political writers have been much divided in opinion with refpeft.to the utility of thefe laws to a date. Montefquieu obferves, that luxury is neceffary in monarchies, as in France, but ruinous to democracies, as in Holland. With regard to England, whofe government is compounded of both fpecies, it may dill be a dubious queffion, (ays judge Blackftone, how far private luxury is a public evil; and as fuch cognizable by public laws. The fumptuary laws of that ancient Locrian legiflator Zaleucus are famous : by thefe it was ordained, that no woman fhould go attended with more than one maid in a the Bim II Sunday. SUN [ 73 ] SUP tU (l«rt ««pt Ae wcrt drunk; th«t fce AouM r.ot go to fati.fy t1,e law of Mof« and to imitate the apoftle,, uAo SuoveMu. out or the city m the night, ijnlefs me went to commit for. ufed to meet too-ether on the firft day ril * nication ; that the (hould not wear any gold or embroidered By Conftantine’e laws, made in 321, it was decreed, that « apparel, unleis (he propofed to be a common ftrumpet; and for the future the Sunday (hould be kept a day of reft ;niuPcrficiM* that men^fhould not wear rings or tiffues except when they all cities and towns ; but he allowed the countiy people to follow their work. T j n ^ went a whoring, &c. Among the Romans, the fumptuary laws were very nu¬ merous : By the Lex Orckiay the number of guefts at feaits was limited, though without any limitation of the charges : by the Fannianlaw, made 2 2 years afterwards, it was enact¬ ed, that more than 10 ajfes (hould not be fpent at any ordi¬ nary feaft: for the folemn feafts, as the Saturnalia, &c. an hundred afles were allowed ; ten of which, Gellius informs us, was the price of a (heep, and a hundred of an ox. By the Didian law, which was preferred 18 years after, it was decreed, that the former fumptuary laws (hould be in force, not only in Rome, but throughout all Italy ; and that for every tranfgreffion, not only the mailer of the feaft, but all the guefts too, (hould be liable to the penalty. The Englilh have had their (hare of fumptuary laws, chiefly made in the reigns of Edw. III. Edw. IV. and Hen¬ ry \ III. againft (hoes with long points, (hort doublets, and long coats; though all repealed by ftatute i Jae. I. c. 25. As to excels in diet, there remains ftill one law unrepealed. Under King Henry IV. Camden tells us, pride was got fo nmch into the foot, that it was proclaimed, that no man fhould wear (hoes above fix inches broad at the toes. And their other garments were fo (hort, that it was enaacd, 25 Edw. IV. that no perfon, under the condition of a lord, . . 53^> the council of Orleans prohi¬ bited country labour; but becaufe there were ftill many* Jews in Gaul, and the people fell into many fuperfti- tious ufages in the celebration of the new Sabbath, like thofe of the Jews among that of the old, the council de¬ clares, that to hold it unlawful to travel with horfes, cattle, and carriages, to prepare food, or to do any thing neccffa- ry to the cleanlinefs and decency of houfes or perfons, fa* vours more of Judaifm than of Chriftianity. See Sabbajf^ Breaking* Sun day-Schools. See Sunday-Schools. SUOVE FAURILIA, an ancient Roman facrifice, fo called becaufe it confided of a pig {fusj, a (heep or rather ram (ov/j), and a hull (taurus). They were all males, to denote the mafculine courage of the Roman people. It was hkewife called folitaurilia, becaule the animals offered up were always fo/ida, whole or uncut. SUPERCARGO, a perfon employed by merchants to go a voyage, and overfee their cargo or lading, and difpofe of it to the beft advantage. SUPERCILIUM, in anatomy, the eye brow. See A- NATOMY, n° I 42. SUPEREROGATION, in theology, what a man does beyond his duty, or more than he is commanded to do. foch length that" (UnV^" ^ T g°Wn’ U‘iIefs The Romanitts upTrenuoufl/for workTof ffjpe^To- member, and buttocks 8 Upng ^11 C°,Cr '”8 pmy a,!d mainta‘“that th' obferrance of evangelicaUoun. SUN, Sol G) in fin. . 1 • 1. , T.,s ruch' B5r meaas hereof, a (lock of merit is laid up, enlightens the world, anTbv i’ts oXce ZftU "d »I>'ch the church has the dlfpofal of, and which (he diltri. See AsraoNOMvS* X P l>«es in mdulgences to fuch as need. Moik-Sus. See Parhelion. SuN-Fifh of the Ir'fh. See Squalus. ,n botany. See He li a nth us. m botany. See Drosera. Sun-FIowc Sun- Dew, In f^V^AnSLANDu’ a Sen«aTname for a clufter of idands hr! d °fiCoean’ lftw"en 93^ and I2ofJ ofeaft longitude, and between 8 north and 8" fouth latitude. The particu- iL”T"c ie ands irc B°rnco'Suma,ra' Ba,'s' 0r 'heeLeTS'DAri * fol'm" MW obfer. our ^ ™S “r" ,heAft‘da)r week, in memory ® our Saviours refurreftion. See Sabbath * ^ the fierft"d'La"d °;!£r0&™ with Sundays I'his abfurd dodrine was firft invented towards the clofe of the 12th century, and modified and embelliflied by St ihomas in the 13th: according to which, it was pretended that there actually exifted an immenfe treafure of merit, compofed of the pious deeds and virtuous actions which the (aints had performed beyond what was neceffary for their own fid vat ion, and which were therefore applicable to the benefit of others ; that the guardian and difpenfer of this precious treafure was the Roman pontiff; and that of con- (equence he was empowered to affion to fuch as he thought proper a portion of this inexhauftible fource of merit, fuit- able to their refpe&ive guilt, and fufficient to deliver them from the punifhment due to their crimes. The reformed church do not allow of any work of fupe- rer^pation; but hold with the apofiles, that when we have of the firft and fecond clafs Thofe nf -ft 1 r conceives of a latter coition ; lo that (he bears at once two particular name which 4a, taken flVSt the ATocaTyptTt" chat,the L-d'»day, mentioned in unlike to ours. ‘ 1 the day1101 much But it was Conftantine the Great who Cvft i r c tile proper obietvation of Sunday • 'nd S "j?" for I-ufebius. annninr-^ft u /i—u i } ’ ,an? ^bo, according out loetules ot unequal age and bulk, and is delivered of them at different times. We meet with inftances of fuperfetations ,!1 Hippocrates, iVnftotle, Du Laurens, See. i but they are fafd to be much more frequent in hares and fvvine. SUPERFICIES, or Surtace, in geometry, the out- fide or exterior face of any body. ThiVis confidered as ha¬ ving the two dimenfions of length and breadth only, but no thicknefs ; and therefore it makes no part of the fubftance or folid content or matter of the body. The terms, or bounds, or extremities, of a fuperficies, are lines; and fuperficies may be coniidered as generated by the ebrus, appointed it (hould b- ‘lcc°r)cnn£ lines. 5 and iuperhcies may be coniidered as generated by the the Roman empire. Before him ^ J e through- motions of lines. Superficies are either redlilinear, curvili- .''kf— . , " ’ o f, ’ a"d even in his time, near, plane, concave, or convex. A teftilinear fuperficies is ur ueiore t Vox.. XVIII.6Part'? "Sab!jatil as weli 33 Sunday; both that which is bounded by right lines. K Curvilinear fuperfi- ciea 1 fiuperfti- tion. s u Superfine cies is bounded by curve lines. which has no inequality in it, nor rifings, nor finkings, but lies evenly arjd ftraight throughout, fo that a right line may wholly coincide with it in all parts and directions. Com vex fuperficies is that which is curved and riles outwards. Concave fuperficies is curved and finks inward. See Geo¬ metry. SUPERFINE, in the manufactories, a term ufed to ex- prefs the fuperlative finenefs of a ftuff: thus a cloth, a cam- blet, &c. are faid to be fuperfine when made of the finefl; wool, &c. or when they are the lineft that can be made. SUPERFLUOUS interval, in naufic, is one that ex¬ ceeds a true diatonic interval by a femitone minor. See Interval. SUPERINTEND ANT, denotes an ecclefiaftical fupe* rior in feveral reformed churches where epifcopacy is not admitted: particularly among the Lutherans in Germany, and the Calvinifts in fome other places. The fuperintendant is fimilar to a bilhop ; only his power is fomewhat more reftrained than that of our dio- cefan bilhops. He is the chief pallor, and has the direc¬ tion of all the inferior pallors within his dillriCt or diocefe. In Germany they had formerly fuperintendants general, who were fuperior to the ordinary fuperintendants. Thefe, in reality, were archbilhops ; but the dignity is funk into dif- ufe ; and at prefent none but the fuperintendant of Wirtem- berg alfumes the quality of fuperintendant general. SUPERIOR, a perfon raifed above another in rank, of¬ fice, or talents. Superior, in Scots law. See Law, N5 clxiv. 3. clxv. 2. & clxvi. SUPERLATIVE, in grammar, one of the three de¬ grees of comparifon, being that inflexion of adjeClive nouns that ferves to augment and heighten their fignificadon, and Ihows the quality of the thing denoted to be in the lu’ghell degree. See Grammar. SUPERNUMERARY, fomething over and above a fix¬ ed number. In feveral of the offices are fupernumerary clerks, to be ready on extraordinary occafions. SUPERPARTICULAR proportion, or Ratio, is that in which the greater term exceeds the lei's by unit or 1. As the ratio of 1 to 2, or 2 to 3, or 3 to 4, &c. SUPERPARTIENT proportion, or Ratio, is when the greater term contains the lefs term once, and leaves fome number greater than 1 remaining. As the ratio of 3 to 5, which is equal to that of 1 to ; of 7 to 10, which is equal to that of I to l y, &c. SUPERSEDEAS, in law, a writ iffued in divers cafes, importing in general a command to Hay or forbear fome or- - dinary proceedings in law, which in appearance ought to be done or purfued, were it not for the eaufe whereon this writ is granted. Thus a man regularly is to have a furety of peace againll him of whom he will fwear he is afraid ; and the jullice re¬ quired hereunto cannot deny it him: yet, if the party be formerly bound to the peace, either in chancery or elfewheie, this writ lies to Hay the jullice from doing that which other- wife he ought not to deny. SUPERSTITION, a word that has been ufed fo inde¬ finitely, that it is difficult to determine its precile meaning. From its refemblance in found to the Latin word fuperjles, a furvivor,” it is evidently derived from it, and difterent attempts have been made to trace their connexion in figni- fication. Balbus, in the dialogue De Natura Deorum ol Ci¬ cero, fays, that they who prayed and facrificed whole days that their children might furvive them, were called fuper- tLitious. Laitantius cenfureg this etymology, and fays P [ 74 1 sup Plane funerficies is that they were not called fuperftitious who wifhed that their chil- Superftk dren might furvive them (for this we all wilh), but becaufe they who furvived their parents worlhipped their images. Others again fay, that fuperllition is derived from fuperjles, becaufe it confilled in conlidering the dead as if they were alive. But thefe etymologies are folely conjedlural; and we confider conjedlures as abfurd in philology as we do in fcience; they may millead, but are feldom of any benefit. The ulual meaning affixed to the word Juperjlition, both in the Latin and Englilh languages, is fo different from fuperjies, that its change of meaning mull be owing to fome accident which it is m vain to inquire after. If we had not known that the word paganvs “ a pagan” was derived from pagus “ a village,” becaufe the heathens in a certain period of the Chriftian hillory lived in villages, the whims and fancies of etymologills would not have thrown much light on the fub- je£t. Without labouring, from the aid of etymology, to define fuperllition, which is a word of a very extenlive lignifica- tion, we will confider to what obje&s it is applied ; and then, by obferving what is common to them all, we fhall be enabled to fix with fome degree of precilion the meaning of the term. We apply it to the idolatry of the heathens ; we apply it alfo to the Jews, who made the will of God of no effesff by their traditions, and fubllituted cere¬ monies in place of the religion of their fathers. We fay al¬ fo that Chrillians are guilty of fuperllition ; the Roman Catholics, who believe in tranfubftantiation and in the ef¬ ficacy of prayers to faints ; and thofe Proteftants who efteem baptifm and the Lord’s fupper, and the punftual perform¬ ance of other ceremonies, without regard to morality, as fufficient to enfure falvation. Thofe perfons alfo are rec¬ koned fuperftitious who believe, without any evidence, that prophecies are ftill uttered by the divine infpiration, and that miracles are ilill performed. The word is alfo extend¬ ed to thofe who believe in witchcraft, magic, and appari¬ tions, or that the divine will is declared by omens or au¬ gury ; that the fortune of individuals can be affefled by things indifferent, by things deemed lucky or unlucky, or that difeafes can be cured by words, charms, and inca*ta- tions. Through all the particulars which we have enumerated, there runs one general idea, the belief of what is falfe and contrary to reafon. From this, however, we mull not fuppofe that whatever is falfe and contrary to reafon may be deno¬ minated fuperftition. We think that it is falfe and irratio¬ nal to fuppofe that there ever lived on earth a race of men who walked on one leg, and had their eyes in their bread; or that there were giants 90 feet high : yet we do not call the philofopher who believes thefe chimeras fuperftitious, but credulous. Superftition has always a reference to God, to religion, or to beings fuperior to man. We do not however diftinguiih all falfe and irrational opinions in religion by the name of fuperftition. We do not, for inftance, apply this name to the opinions which fome of the ancients entertained, that God is the foul of the world, and that men are only portions of him feparated for a time, or that the foul after death lives fucceffively in different bodies. If we examine the fubjedl with more attention, we fhall difeover that the foundation of fuperftition is ignorance of the moral attri¬ butes of God ; for we never fay a man is fuperftitious for en¬ tertaining erroneous opinions of the natural attributes of God. Some of the Socinians have denied the prefcience of God; and a French philofopher has not only rejefted the belief that He is a fpirit, but has prefumed to fay that he is compofed of a fpecies of cryftals. The firffc of thefe opinions difeovers very imperfedl ideas of God, and the fecond is the height of impiety and abiurdity; yet the 5 So- S UP [ 7 gHperfti- Socfmans have not been accufed of fuperftluon, nor can this tiou. French philofopher be fufpected of it. We do not call every falfe opinion concerning, the unity or moral attributes of God by the name of fuperftition, as, for inftance, the opinion which fome fceptics have fupported, that God is not good ; for, as was mentioned before, fuperftition always involves the idea of credulity. It does not confift in falfely denying that God poffeffes any particular moral attributes, but in believing more than what is true concerning them; in forming mean, un¬ worthy ideas of them; in fuppoling that he is guided by blind paffion like mankind, and enjoins upon his creatures commandments which are irrational and abfurd. As fuperftition arifes from ignorance and credulity in the underftanding, fo it has alfo a feat in the paffions. Fear has been commonly confidered as the paflion of the hu¬ man mind from which it chiefly derives its origin; and there is no doubt that more fuperftition has arifen from fear united with ignorance and credulity than from any other paflion. Yet it would certainly be improper to exclude all other paf- i"-ons. We cannot account for the fuperftition of the Egyp¬ tians, without luppofing that much of it arofe from gratitude. They worfliipped the Nile, becaufe it diftributed fertility and abundance over the land of Ekjypt ; and they worfhipped fome animals, merely becaufe they prevented the increafe of other animals which were noxious. Thus they adored the ibis, becaufe it deftroyed the eggs of the crocodile. Having thus endeavoured to analyze the ideas compre¬ hended under the word iuperltition, we may fum them up in a few words. It refpefts God and beings fuperior to man, and extends to our religious opinions, worftiip, and practices; and may be defined abfurd opinions and aSions ari/ingfrom mean and defeSive ideas of the moral attributes of God. Eet us apply this definition to the different fpecies of fuper- ilition already mentioned. But before entering upon this application, it may be pro¬ per to obferve, that fuperftition involves the idea of a blame- able inattention to reafon, or a credulity arifing from an in¬ dolence of underftanding. We generally make a diftinftion between the imperfed opinions which a favage, from the neceffary effe&s of hip fituation, forms of the attributes r u ’ rand th0‘e vvhlc^ civilized nations entertain. We iay the favage is ignorant, and we aferibe his ignorance to his fituation; but we call the Roman Catholic fuperfti- ■ tious, and we blame him for not having thofe juft ideas of God which he might have obtained by opening his Bi- ble, or by the exercife of his underftanding in the favour¬ able fituation m which he is placed. Superrtition then docs not originate fo much from the natural weaknefs of the hu- ofk |l^erftandlnS’ as from a mifapplication or a negleft nfrlrT "Ith any Pr°Pn'ety app'y 'h= name fiP'Mon to polytheifm m general; for what all ihe ancient phi ofophers after much Hudy and refleftion, concluded to frlT!?. f™m.credulity and inattention. whence If -7 Foper,;: however, ItO- ra/h SeTnotanf? ^ °f fnpnrTS,3 Th”" fd3 1fool,'ft, things fuperftitious mantp fprinUM hS ,S,re W"0’,havin« «(hed his hands, and " leat ht r,! f ATi 'h' “"-Pk with a laurel in Ht'o vi , • ; , ° ‘•llt '-vmpie with a laurel Or, if a weafel fh "iV W le about the whole day. Hep till he ha- tfi°U ^ S r0ad’ n,ot advance a 1 thrown three ftones over the road. If he finds U)W sl SUP a ferpent in his houfe, he rears a place of devotion on the Superfti- fpot. He purifies his houfe often, will not fit upon a grave, tiolF nor touch a dead perfon. He is anxious about the interpre- ‘ ^ tation of his dreams, will not offer a facrifice unlefs his wife go along with him, or, if fhe is engaged, he takes the nurfe and the little children. He purifies himfelf with onions ; and when he fees a mad or an epileptic perfon, he fpits in their bofom. 8uch was the charatfer of fuperftition in the days of 1 heophraftus. All thefe whimfical ceremonies were done to prevent mifehief, and to avert the wrath of the gods; and therefore perfectly correfpond with the definition given above. It is only neceffary to confider a little the fuperftitious opinions and pra&ices among Jews and Chriltians, to be fen- fible that they have all arifen from mean and abfurd ideas of the moral attributes of God ; for they have generally enter¬ tained noble opinions of his natural attributes. The Jews confidered God as a partial Being, who had a predilection for their nation in preference to all others, and preferred ex¬ ternal homage and ceremony to moral purity. If the Ro¬ man Catholics think confidently, they muft efteem God as a Being who can be prevailed upon by the importunity of one dead man to afllft another, or as a Being whofe patience would be fatigued with hearing prayers conftantly. Hence their practice of praying to faints. They in effeft believe, however they may deceive themfelves, that God is unjuft, or they could not believe tranfubftantiation; for it fuppofes that God can give commands diredtly contrary to thofe principles of belief with which he has endued the human mind. They confider a ftridt adherence to a variety of ceremonies, to forms, to pomp, and fhow, as effential to the worftiip of God : this is treating God as a vainglorious Being. They thought it their duty to extirpate heretics: this was fup- pofing God a cruel and revengeful Being. Even among Protellants, we are forry to fay, a great deal of fuperftition remains: we have not yet learned to confider God as a fpi- nt, who is to be worfhiped in fpirit and in truth, as a pure moral benevolent Being ; and hence arifes all the fuperfti- tious practices which prevail among us. Befides thofe fuperftitious opinions and practices which entirely refpedt our duty to God, there are others which may be termed vulgar fuperjlitions. Thefe alfo arife from imper- fe£t and mean ideas of the moral attributes of God. To be¬ lieve vulgar prophecies, which are always the effufions of mad- nefs or knavery, is to fuppofe that God, who has drawn a veil over futurity, and only delivers prophecies to accomplifti fome great moral purpofe, fometimes gives them for no pur- pofe at all, or to gratify idle curiofity, or to difclofe fuch a knowledge of what is to happen as is inconfiftent with the free agency of man and the moral adminiftration of the world. Nor is it lefs fuperftitious to believe in vulgar mi¬ racles. To believe in them, is to believe that God fufpends the laws of nature for the moft trivial purpofes, or to countenance fraud and worldly ambition : it is to receive the moft extraordinary fads upon the moft unfatisfaftory evidence. The belief witchcraft, of apparitions, and the fecond fight, may be refolved into the fame principle. To tuppofe that God would communicate the power of doing mifehief, and of controuling his laws, to any being merely for gratifying their own paflions, is unworthy of God. The beliet of apparitions is equally inconiiftent with the good- neis of God (fee Spectre). The fame obje&ion rifes againft the fecond light as againft the belief of vulgar prophecies, and may alfo be extended to omens, to aftrolo- gy, to things lucky and unlucky, to fortune-telling, &c. As to the different devices and charms for preventing and curing diforders, they refemble in every refpeef falfe miracles. K 2 A do not pretend to fay that this is the fenfe in which fuperftition is always uled, becaufe it is often ufed improperly. r Superfti- tion. SUP A judicious hiftory of fuperfUtion would be a curious and entertaining work, and would exhibit the human cha- ra&er in a remarkable point of view. Superltition is moil prevalent among men of weak and uncultivated minds ; it is more frequent in the female fex than among men; and abounds more in the rude than in the refined Itages of fo- ciety. The general features of it have been the fame in all but it affuir.es certain peculiarities according to the Tranjac tions, stol. in. diverfity of chara&er of different nations. It gained adrnifi fion into the fcience of medicine at an early period. He who was endowed with fuperior genius and knowledge was rec¬ koned a magician. I)r Bartolo was feized by the inquifition at Rome in the laft century, becaufe he unexpectedly cured a f Tancbefter nobleman of the gout. Hifeafes were imputed to fatcina- tion, and hundreds of poor wretches were dragged to the Hake for being acceffaiy to them. Mercatus, phylician to Philip II. of Spain, a writer of uncommon accuracy and information, appears ftrongly inclined to deny the exiitence of fafcinatory difeafes : but he is conffrained to acknow¬ ledge them for two realons ; \J2, Becauie the inquifition had decided in favour of their reality; 2d/y, Becaufe he had feen a very beautiful woman break a fteel mirror to pieces, and blaff fome trees by a fingle glance of her eyes. As the opinions concerning the caufe or dileafes were fuperffitious, thofe concerning the method of curing tlrem were not lefs fo. In the Odyffey we read of a cure per¬ formed by a fong. Jofephua relates, that he faw a certain Jew, named Eleazar, draw the devil out of an old woman’s uoftrils by the application of Solomon’s leal to her nofe in prefence of the Emperor Vefpalian. Many different kinds Flaiiella- "Memoir tf Sully, Supper. 76 ] SUP name of alhajls', and the predictions of Rice IS vans hm * Jjmifar been fupported io the prefent century by the celebrated names of iVarburton an&Jortin. Dr Hoffman, the father of the Modern Theory and Practice of Medicine, in a difiertation publiftied in the large edition of his works in 1747, fays, that the devil can raife ftorms, produce infers, and aft upon the animal fpirits and imagination ; and, in fine, that he is an excellent optician and natural philofopber on account of his- long experience. Dr Johnfun, the leviathan of literature, is fuppofed to have believed the lecond light. With reipedt to the effefts of fuperftition on the human, mind, they are indeed deplorable. It chains down the un- derllanding, and links it into the molt abjeift and fordid ftate, and keeps it under the dominion ot fear, and fome- times. of cruelty. Where once it takes poffelfion, it has a . tendency to become extreme, and generally becomes fo in¬ tolerable, that men of refleftion and learning confpire its dellrmftion. The Ghriftiaju religion gave a violent Ihock to | Ibid. I Tiayle, >Vrt. Ma- y/». of applications were ufed for expelling the devil, tion fometimes fucceeded admirably ; purgatives and anti- fpafmodics were other modes ot difcharging him. Dr Myn- jlight cured feveral bewitched perlons with a plafter of affa- fcetida. How the affafcetida was fo efficacious, was much difputed. Some thought the devil might confider fo vile an application as an infult, and run off in a paffion ; but others very fagely obferved, that as devils are luppofed to have eyes and ears, it is probable they may have noles too. Nor was it only in medicine thele fuperftitious opinions were entertained ; they prevailed alio in natural philofo- phy. The pernicious effeifts in mines, which we now know are occafioned by noxious air, were confidently imputed to the demons of the mine. Even Van Helmont, Bodinus, Strozza, and Luther, attributed thunder and meteors to the devil. Chemilts were employed lor centuries in fearch of the philofopher’s ftone, with which they were to do miracles. It was a common quellion among philofo- phers in the lall century, whether the imagination could move external objeifts ? A queftion generally decided in the af¬ firmative. Though fuperftition be generally the mark of a weak smind, fuch is the infirmity of human nature, that we find many inftances of it among men of the moft fnblime ge¬ nius and moft enlightened minds. Socrates believed that lie was guided by a demon. Eord Bacon believed in witchcraft ; and relates that he was cured of warts by rub¬ bing them with a piece of,lard with the Ikin on, and then nailing it with the fat towards the fun on the poll of a chamber window facing the fun. Henry TV. one of the moft illuftrious of monarchs, was very uneafy before, his al- r iaffination on account of fome prophecies Sully de¬ clares, that one of the confiderations that kept him faith¬ ful to his mafter in the moft unpromifing ftate of his af¬ fairs, was a predi&ion of La Broffe, that Henry would, make his fortune f. The aftrologer Morin directed Car- dinal Richelieu’s motions in fome of his journeys J. ft he enlightened Cudworth defended prophecies in general, and called thefe who oppofed the belief of witchcraft by the the heathen fuperftition ; the reformation in a great mea- fme demohfhed the fuperftitLon of the church of Rome; and the iuperftiLion which remained among Proteftants after their feparation from that church has been gradually yield¬ ing to the influence of enlightened reafon, or to the bold and daring attacks of infidelity and deilm. We behold the profpe and ending in u of the ablative cafe, is of apaffive fignification, and is go¬ verned by fubftantives or adje&ives ; ^facile di3u, &c. They have their name, fays Probus, and after himVoffius5 quod ad injlar iupinorum & atioforum hominum omnia babent confufa : or, according to Prifcian, quod nafeantur a partici- piis pajjivis) qua fupina appeiiata Junt, quia in injimo loco Jita$ totam conjugatioms molem Jufcipiant. SUPPER, the evening lepail,— Suppers that are heavy fliould be avoided, becaufe the ftomach is more oppreffed with the fame quantity of food in an horizontal pofture than an ere have equally afforded matter of dilputation to angry ^"’controvertiils. Many members of the church of Rome condemn the Greek church and the Proteftants for ufxng leavened bread in the Lord’s Supper, contrary to the ex¬ ample fet them by our Saviour ; whilfl the Greek church in general, and fome Proteftant focieties in particular, unite with the church of Rome in cenfuring all churches which mix not the wine with water, as deviating improperly from primitive praftice. See Eucharist. That it was unleavened bread which our Lord blefled and brake a-nd gave to his difciples as his body, cannot be queftioned ; for at the time of the paffover, when this oi-- dinance was inflituted, there was no leavened bread to be found in Jerufalem*. For the mixed cup, the evidence is not fo decifive. It is indeed true, as we have obferved un¬ der the article Eucharist, that the primitive Chriftians ufed wine diluted with water; and if we may believe Mai- f Tn Mijb monidesf, it was the general cuftom of the Jews, as well nam. at the paflover as at their ordinary meals, to add a little water to their wine on account of its great flrength ; but that this was always done, or that it was done by our Sa- •viour in particular, there is no clear evidence. Origen in- in Hu re- ^ ^eec^ a®rmsi> that our Lord adminiftered in wine unmix- nium. ’ an<^ was 1}ot a man to hazard fuch an affirmation, had there been in his days any certain tradition, or fo much as a general opinion, to the contrary. On this ac- count w'e have often heard with wonder the neceffity of the mixed cup infifted on by thofe who without hefitation make ufe of leavened bread ; for if it be effential to the fa- crament that* the very fame elements be employed by us that were employed by our Saviour, the neceffity of un¬ leavened bread is certainly equal to that of wine diluted by water. But the mixed cup is faid to be emblematical of the blood and water which flowed from the fide of our Lord when pierced by the fpear of the Roman foldier, .while the . a ence of leaven is emblematical of no particular circum- ance in His paffion. This argument for the, mixture is as old as the era of St Cyprian, and has fmee been fre¬ quently urged with triumph by thofe who furely perceived , not its weakuefs. The flowing of the blood and water bom our Saviour’s fide was the confequence either of the pear s ia\mg pieiced the pericardium, or more probably of ^in^l Z }ylro'i°rax’ oceafioned by his cruel and ling- Lsgthtr\(f%MTC1NE’ n° 342.’ But whatever au^ lt;> how can the mixing of wine with wa- ter m the facrament be emblematical of the fWim, 0£ 77 1 SUP blood and water feparately ? Such a mixture furely bears Supper. a more linking refemblance to the reunion of the Jerum and V f crajfamentum, after they had been feparated by whatever caufe. See Blood. We urge not thefe obje&ions to the mixed cup from any diffike that we have to the praaice. It is unquef- tionably harmlefs and primitive ; and we wifh that greater regard were paid to primitive praaices than the generality 3 of Chriltians feem to think they can claim : but let the frivolous* advocates for antiquity be confittent ; let them either re- ftore, together with tne mixed cup, the ufe of unleavened bread, or acknowledge that neither the one nor the other is eiTential to the facrament. This lafl acknowledgment mull indeed be made, if they would not involve themfelves in difficulties from which they cannot be extricated. If either the mixed cup or unleavened bread be abfolutely neceffary to the validity of the facrament, why not wine made from the grapes of Judaea ? why not that particular kind of wine which was ufed by our Saviour? and where is that wine to be found? 4 But the controverfies refpc&ing the outward part or About the" fign of the Lord’s Supper are of "little importance when th”^. fiK- compared with thofe which have been agitated rdpe&ing nitlcd’ the inward part or thing fignified ; and of thefe we haften to give as compreheniive a view as the limits preferibed to fuch articles will admit. Our Blefled Lord, in the fame night that he was be¬ trayed, “ took bread, and blefled it, and brake :Sy and ga\e it to the difciples, and hud, Take, eat; this is my body. And he took the cup, and gave thanks, and gave it to them, faying, Drink ye all of it; for this is my blood of the new teftament, which is {bed for many for the re- million of fins.” Such was the Jnftitution of the Lord’s Supper as it is recorded in the gofpel by St Matthew ; and we have the fame account of it, jn almoil the very fame words, .by three other infpired writers, St Paul, St Mark, and St Luke., That it was the bread which ChriiLblefled and brake that is here called his body, and the wine over which he gave thanks that he ftyies his blood of the new teftament, will admit of no reafonable doubt (a); but in what fenfe they became fo, has been the fubjedt of many controverfies. ^ . . The church of Rome; which holds, that after oonlecra-Prcftrine turn, Jefus Cbrill, God and man, is really, truly, and fub-of tile flantially, contained under the outward appearances of thechurch biead and wine, informs us, tnat about the middle .01 the oir'e mafs, when the. prieft, taking into his hand, firft the bread and then the wine, pronounces over, each feparately the facred words- of confecration, the fubllance of thefe ele¬ ments is immediately- changed by the, almighty power of God into the body and blood of Chrill ; but that all the outward appearances of the bread and wine, and all their fien- elements, together -Hthile 11 (r co"fccrated bread and wine, but thofe »"!? the bread and wine to the ddc pies tbt ft,, ,7 ,"t°, h,S,ha,"d8’ bleffing them breaking the bread, and diilribu- upon no better foundation than a v„, cMdl o V ' n ^ , ]> "ovJ xpmion refta to the djfciples, faying, i„ the origiLl, '"d bra^“g t,‘* it gender, can never agree with the anteoeden, « ■ ! • , r. , , T ? W’ OUr ^'Ics> the neuter taken together, and confidered as one oomnl ? " 10 'lie mafcul’ne’ But muft refer to all the circumilances of the afiion Jotes ^at could be eaten ,• and to Wofe tH , comPlcx or limple, certainly de- human reafoa as any doHrine of the church ofR ^ b^f^dfred^ls aP9ftles to eat a8ionsr is as repugnant to article than a demonftrative pronoun fee GrImZ n u \ 7 ^ ^ P^periya definite Saviour held In his hand and gave to \he dife ’ V ?' I.L);,refeirsdireaiy to thing, whatever it was, which our this/uljance, is m h()d Tg I10d‘ P|j;s i a“d clauie, when completed, is .v ; this beinv, that it might be f ° nece^ty for charaaenhng that fubftance by any analogy to fex in ordS Matter. “ ^mgmlhed from cry other fubllana ; for theSaPoftl£s could not but fe it fn Jc ha^d M th!S ■ S U P pprf. fenfilile qualities remain. This more than 'V"—' change is called transubstantiation ; and is founded on the philofophy of Ariftotle, which refolves all bodies into matter and form (fee Metaphysics, n° 142—150.); Ttiv aapica, xai TThiov piov to but o' rpuyov r»)i( v\nv pov rwf oxpx.oc, xai TTivav rwv uAfU pujv row diuctfoc, “ whofo eateth the matter of my flelh, and drinketh the matter of my blood, hath eternal life, and I will raife him up at the laft day.” Rut further, fuppofing this Angular converfion poflible _r*i " , V , —vu.wu dWLiw.io in itfelf, it cannot be rendered credible, however ftated in ™ r ™wcnt ca"not be fupported without having re- any language that ever was or ever will be fpoken by man 8 courfe to figure and metaphor. Ihis however is a very At firlt light it may appear paradoxical ^affirm ^hat aAndLa- vam triumph ; for we^helitate not to affirm, that fuppofmg poffible faft cannot be lo related as to obtain credit • butPab!eof rnof that tranfubftantiation, if poffible, is fuch a will bePr0°f* apparent on the llighteft conlideration. I he relation that fublifts between things and words is arbitrary ; fo that what is termed loe/y in Englilh, is in Greek, and corpus in Latin ; and the fame thing might with equal propriety (had the authors of thefe languages fo pleafed) have been exprefled in the firft by/01//, in the fecond by -w, and in the third by anima. (See Language n 3, &c.) The confequences of this are, that there is m> univerfal language fpoken ; that the natives of one country underhand not the fpeech of thofe of another; and that dif- ” r-; >, * '■vx.i-ci.i. nut lg ctmrrn, mat luppoixng tranfubftantiation poffible, and even capable of proof, there is not in the whole New Teftament a Angle woid or a Angle phrafe which, if interpreted literally, gives the Aightefl countenance to that wonderful doctrine. The reader will remember, that tranfubftantiation, as we have ftated it from a dignitary of the Romilh church, and as it is in fact ftated by the council of Trent (d), con Alts in a change of the matter, imperceptible fufjlance, or fub ft ratum of the bread and wme into the matter, imperceptible fulftance, or fubjlratum of Chrift s body and blood ; for all parties agree that the ienftble qualities of the bread and wine remain, and, accord- b contrary notlun„ o Scrip- - -- 0 :ure. ing to the Romanift are after o.nf. V r \ ^laemano not the Ipeech of thofe of another; and that dif- by the matter of Chrift’s body and blooVorimnfrT"1'1 tt‘e,'.t„me1'nnguage are perpetually liable «hi„g. But the pl,rafevl;rr:i’Z f SeeT": °1 ™mearg' LBet^eCnfi,e>^toof the literal We, cannot ooffiblv denote ,l,e r c oodles and then/njM/e gaa/tlm, there is a relation founded fuch a change as tlfis t for e“L .erfo,! a, " /'n"''tl f° ** ^ fe"fibfe *Wch indicate the with the Greek language, efneckiUy the |ail,r“b(ljnct'to w.h'c.h ‘toy belong, to he gold, for inftance, in Peripatetic fchool, knows that v.ram f/;iies,/,he try" ““'’'ft.’."u!!3'r,be famf tb,ng. in.mrl oth^ conn- - - - -r -,— ligniAes, 1101 me matter or fubjlratum of my body divefted of its fenlible qua- Iftas ; but the body of me in its natural ftate, confifting of matter and qualities, or matter 'ami form united. Unlefs there¬ fore the fenfible qualities, as well as the matter of the bread and wine, give place to the fen Able qualities as well as the matter of our Saviour’s body and blood, and unlefs he ap- try, and have done fo from the beginning of time. The fenlible appearances of bodies therefore are an univerfal language, the language of the Author of Nature, by which he declares to his creature man, that though the vpu'ly. or primary matter of all bodies, may be the fame kind of fub! ftance ; yet the wo Gf cne body, or the internal combination of its primary parts, differs from that of ano¬ ther ! our damnation for not having it in our power to emh '\ fWd ]iav.e don!> had he Id's poAtively pronounced virtuous heathens, though they never faw die New Teft unent ^*1 ^fh "0t 'n.deed fmuch lefs fevere on the moll perhaps this feverity may be occaAoned bv the All .ament’ ?r he^rd the Joannes of his church preached. But ^imus, genere no's quidemTrlnis'ut ^ ^ ' “ Cnm ; vinum, LI catur, deum credat effe ?” tie Nature, Deorum, Lib. 3 C^p 16. TAM AMENT1:M Putas> ^ ^d, quo vef- Dr Abernethy Drummond, abo^t tSty^yelrs ago ffid^ f^' ^ fma11 traa Publ]'ffied by that treatife, together with a defence nf it ' 1U 1 ^ ’ ta,e ^°.rm of ^ Dialogue between Philalethes and Benevclus In Chrfticin Injlru3ed: “ If any man ffialHaf th^blelffidT11011 ^ th^S,tra^at,cd b>' the author of ^ Sincere and wine remains along with the body and blood of our ^ nEn nhanil the fubftanGe ^ tbe bread converAon of the whole fubftance of the bread intn Z k A ] T c Z ^ de^ that wond^ful and Angular the appearances of the bread and wine only •1 th / i7, ar'd the fubftance of the wine into the blood hm be anathema.’’ C onIy rcmi*<“ing. which converfion the Catholic Church calls tratfalj/amatlofkb I SUP t 8( Pnpfer. tliev ; that gold, for inftance, has a difTerent fuljlratum or u~''— i,f,s from iron, lead, or filver ; that the internal organiza¬ tion or ftructure of the body of an ox is different from that of a horfe ; and that the internalfubjlarue or fuljlratum which exhibits the appearances of bread and wine is different from that which fupports the fenfible qualities of flelh and blood (fee Metaphysics, Part I. Chap. I. and Part II. Chap. I. and It.). Suppofmg therefore the do&rine of tranfubftsntiation to be poilible and even true, it would ftill be impoffible, by any ftatement of it in human language, or by any argument urged in its fupport, to render that dodtrine an objedt of rational belief; for if it be laid that the words toi/7'* tod* ro were fpoken bya divine perfon, who could neither be deceived himfelf nor intend to de¬ ceive us, it may be replied, that the fenfible appearances of bread and wine, which are confeffed to remain, are like- wife the language of a divine perfon, even of the Creator and Governor of heaven and earth; that this language addreffed to the light, the tafte, the touch, and the fmell, is equally intelligible to all nations ; that fmce the creation of the world its meaning has never been miftaken by the fcholar or the clown, the fage or the favage, except in this dingle inftance of our Lord’s flelh and blood exhibiting the fenfible appearances of bread and wine ; and that it is therefore infinitely more probable that the members of the -church of Rome fliould miftake the meaning of the words t?u7« tch TO' eset/.a ,uov, which, though fpoken by Chrift, are part ofthe language of men, and liable to all its ambiguities, than that all mankind fliould miftake the language of God himfelf, which is liable to no ambiguities, and which w-as never in any other inftance mifunderftood by a fingle in¬ dividual. Should tranfubftantiation therefore be really true, its truth can never be proved or rendered probable, 'but by an immediate operation of the fpirit of God on the mind of man ; and he who is confcious of no fuch opera¬ tion on his own mind, may reft affured that the Father of mercies, who knows whereof he is made, will never bring upon him, for his incredulity in this inftance, any of the anathemas denounced by the church of Rome upon thofe who place implicit confidence in the univerfal language of Him who created them, in oppofition to her figurative and contradictory interpretations of the written word. Of the tranfubftantiation of the elements a vifible miracle would afford no proof. Had the water been changed into wine at the marriage in Cana of Galilee, for the exprefs pur- pofe ofbearing teftimony to this lingular converfion, what muft have been the confequence on the minds of thofe who witneffed that miracle ? Nothing, we think, but feepti- cifm or a diitruft of their own faculties ; for they would have had the very fame evidence that no fubftantial change was wrought on the elements, as that the water was aflual- ly turned into wine. Though the reformed churches unanimoufly reject the doctrine of tranfubftantiation, and of courfe the facrifice of the mafs, its infeparable confequence, they are far from be- ing agreed among themfelves refpeCting the nature of the Lord’s Supper; and the notions of this ordinance enter- tained by fome of them appear to us as untenable as any Doftrine part of the doctrine of the church of Rome, ft he Luthe- of the Lu- rans believe, that the body and blood of Chnft are really , ’n' and fubftantially prefent with the bread and wine ; that the body is really and truly eaten, and the blood really and truly drunk, by the communicants; and that whatever mo- f t!"on or a<^on bread has, the body has the fame$. Ac- 4oc* (jer 'cording to them, therefore, the fame fenfible appearances lard in Loc. are exhibited by two fubftances united in fome inexplicable ¥keol de manner, which is neither a perfonal union, nor incorpora- Sacra Cana. nor tjie hiclofuve of the body within the bread j nor > ] SUP does it laft longer than while the facrament is celebrating. Supper. This union is generally called con substantiation ; butv-W they reject the term, contenting themfelves with afferting the real prefence, without prefuming to define the mode by which the body and blood of Chrift are united to the fa- cramental elements. It would be fuperfluous to wafte time in replying to this doCtrme. Everv reader fees that it implies the pofiibihty of the fame thing’s being whole and entire in a million of places at one and the fame inftant of time, which has been fo often urged as an unanfwerable objeClion to the Romifli (brCLmc ; and it is fraught "with this additional abfurdity peculiar to itfelf, that two bodily fubftances may at once occupy the fame place, which is dirqdly contrary to our notions of fohdity. It may be obferved too, that whate¬ ver be the real fenfe of our Saviour’s words, be fays ex- prefsly, “This is my body”—this thing which I give you, and \vhich you fee and feel; whereas, had he meant what Luther and his followers teach, he would furely have faid, “ With this bread receive my body, with this cup receive my blood.” nr J0 The notions of fome of the early Calvinifts refpeChngO™* the Lord’s Supper are very myfterious, and expreffed in ^ '' language of which wre are not lure that we underftand the meaning. In the year 1561 an attempt was made in France to bring the Catholics and Proteftants to an uniformity of doftrine on this great topic of controverfy ; and deputies were appointed by both parties to meet at Poify, and de¬ bate the queftion in a friendly manner. The principal ma¬ nagers on the fide of the Catholics were the cardinals of Lorraine and Lournon; thofe on the fide of the Proteftants were Bcza and Peter Martyr. After feveral meetings, difputes, and violent feparations, the Proteftant deputies declared their faith in the following words: “ We confefs, that Jefus Chrift, in the Supper, does truly give and exhi¬ bit to us the fubftance of his body and blood by the efficacy of his Holy Spirit; and that we do receive and eat fpiri- tually, and by faith, that very body which was offered and immolated for as, fo as to be bone of his bone and fleffi of his flefh, to the end that we may be enlivened thereby, and receive what is conducive to our falvation. And becaufe faith, fupported by the word of God, makes thofe things prefent, wftiich it apprehends, and by that faith we do in deed and reality receive the true natural body and blood of Chrift, by the power of the Holy Spirit ; by this means, we confefs and acknowledge the prefence of his body and blood in the Supper.” One of the Catholic delegates ex- preffing his diflike of this laft claufe, the Proteftant mini- fters gave the following explanation of their fentiments: “ No diftance of place can hinder us from communicating of the body and blood of Chrift, for the Lord’s Supper is a heavenly thing ; and though on earth ive receive with our mouths bread and wine, wrhich are the true figns of his body and blood, yet by faith, and the efficacy of the Holy Ghoft, our minds, which are fed with this food, are rapt up into heaven, and enjoy the prefence of the body and blood; and that by this means it maybe faid that the body is truly joined to the bread, and the blood to the wine ; but after the manner of a facrament, and not at all accord- # ing to place or natural pofition lib, If the reader can difeover the precife meaning of see alfo thefe paffages, his fagacity exceeds ours. That the Pro- teftant deputies believed, or profeffed to believe, that the natural body and blood of Chrift are by the faithful recei-v^ ,, ved in the Lord’s Supper, is indeed evident; but their no¬ tions refpe&ing the manner of this reception ai-e very un- _ ^ intelligible, if not contradictory. In the former quotation, they confefs that Chrift’s body and blood are really prefent 8‘ in SUP r Ti Of the in the facrament; that they are made preftjnt hy faith (we -'fuppofe the faith of the communicants); and that the wrv body which was offered and immolated for us is eaten fpiri¬ tually and by faith. In the latter quotation, they ieem to fay that Chrift’s body and blood are in heaven, at a great diftance from the true iigns of them; that on earth the com¬ municants receive onlythefefigne,which are bread and wine; but that, by faith and th# efficacy of the Holy Spirit, their minds, during aftual communion, are rapt .up into heaven, where they enjoy the prefence of the body and blood ; and that by this means the body and blood are truly joined to the bread and wine throuorh the medium of the mind of the communicant, which is at once prefent both to the fign and to the thing figniiied. To this myfierious doclrine it is needlefs to urge obje£Hons. Every man who is accuf- tomed to think, and to ufe words with fome determinate meaning, will at once perceive that the authors of this de¬ claration muft have had very confufed notions of the fub- jeft, and have pleafed themfelves with found inftead of fenfe, fatisfied that they could not be wrong if they did not fym- bolize with the Lutherans or the Council of Trent. The churches of England and Scotland, in their efla- churchesof blifhed doftrines refpedfing the Lord’s Supper, appear to be Britain. Calviniftical; but the compilers of the Thirty-nine Articles and of the Confeffion of Faith mult have been much more rational divines than Beza and Peter Martyr. They agree in condemning the dodtrine of tranfubftantiation as contra¬ ry to common fenfe, and not founded in the word of God; they teach, that to fuch as rightly, worthily, and with faith, receive the facrament, the bread which we break is a par¬ taking of the body of Ohrid, and the cup of bleffing a partaking of the blood of Chrift ; and they add, that the bo,dy and blood of Chi'ift are eaten and drunk, not corpo¬ rally or carnally, but only after a heavenly and fpiritual manner, by which the communicants are made partakers tnhe(’burcb°^ ^iie benefits of his death *. In one important cir- \f England, c.um^ance two churches feem to differ. The Confef- Arc. %>h. f10n of Faith, as we underhand it affirms, that in the and Confef- Lord’s Supper there is no facrifice made at all. The thir- fi;'ilartn;de of!he cllurch of England likewife condemns PChap. jo.tae ' °P1^1 iaeiiiice or the mafs as a blafphemous fable and 5 j. ... dangerous deceit ; but in the order for the adminijlralian of the Lord's Supper or Holy Communion, the celebrator “ befeech- es God moft mercifully to accept the alms and oblations of the congregation,” and again “ to accept their facrifice of fraife and thankfgiving: ’ from.which petitions manv have inferred that, in the Lord’s Supper, that church offers a commemorative and euchariftical facrifice. This inference meins not to be wholly without foundation. In the order for the adminirtration of the Lord’s Supper, according to tue form of the Book of Common Prayer fet forth by aft of parliament in the fecund and third years of king Edward the Sixtn, the elements were folemnly offered to God as a lacrifice of praife and thankfgiving; and though the prayer containmg that oblation was, at the review of the liturgy fome years afterwards, removed from the prayer of confe- cration, to which it was originally joined, and placed where it now Hands in the poll communion fervice ; yet the very aft of parliament winch authorized that alteration, calls kmg Edward s “ a very godly order, agreeable to the word of God and the primitive church, and very comfort- ItLm’’" g°Cd pe°pIe ddlrin^ to live Chriftiaa conver- Vol. XVIII. Part I. supper. 13 Si 1 SUP The EHglifh church, however, has not nofitivdy deter¬ mined any thing refpefting this great queftion ; and whilft ~ file condemns the doftrine of the real prefence, with all it3Some dangerous confequences, ihe allows her members to enter-Hfli divines tain very different notions of this holy ordinance, and to ho d the publifh thefe notions to the world. Accordingly, many sp’uP" her mold eminent divines (e) have maintained that, in the3^^ celebration of the Lord’s Supper, the elements of bread nltical fa- and wine are offered to God as a facrifice commemorative orifice, of Chrift’s one facrifice for the fins of the whole world ; that thefe elements, though they undergo no fubftantial change, yet receive fuch a divine virtue by the defeent of the Holy Ghoit, as to convey to the worthy communicant all the benefits of Chrift’s paffion ; that they are therefore called his body and blood, becaufe being, after their obla¬ tion, eaten and drunk in remembrance of Him, they i'upply the place of his body and blood in the fcaft upon his facri¬ fice ; and that it is cuftomary with our Saviour to give to any thing the name of another of which it completely fup- plies the place, as when he calls himfelf the door * of the * St John fiicep, becaufe there is no entrance into the church or king-Xi 7* dom of God but by faith in him. They obferve, that the Eucharifl’s being commemorative, no more hinders it from being a proper facVifice, than the typical and figurative fa- crifices of the old law hindered them from being proper fa- crifices: for as to be a type doth not deitroy the nature and notion of a legal facnfice, fo to be reprefentative and com¬ memorative doth not deftroy the nature of an evangelical ia- crifice. To prove that, in the celebration of the Lord’s Supper, there is a real facrifice offered to God as well as a facrament received by the communicants, they appeal to St Paul, who lays exprefsly j-, that “ Chriftians have an t Heb. xiil. altar, whereof they have no right to eat who ferve the ta-10, bcrnacle,” and who by contrafting the cup of the Lord with the cup of devils, and the table of the Lord with the table of devils fj, teaches plainly, that thofe cups and thofef 1 Cor. x. tables had the lame fpecific nature. That the table of nfc-l6> ^!•c• mils fpoken of by the apoftle was the Pagan altars, and the cup of devils the wine poured out in libations to the Pagan divinities, will admit of no difpute ; and therefore, fay the advocates for the euchariftical facrifice, the table of the Lord muft be the Chriftian altar, and the cup of the Lord the wine offered to God as the reprefentative of the blood of Chrift ; othenvife there would not be that abfurdiiy which the apoftle fuppofes, in the fame perfon drinking the cup of the Lord and the cup of devils, and partaking of the Lord’s table and the table of devils. They obferve farther, that in all the ancient liturgies extant there is a fojemn form of oblation of the facramental elements, and that all the Chriftian writers from the fecond century down¬ wards treat of the Lord’s Supper as a facrifice as well as 'facrificial feaft, having indeed no value in itfelf, but accep¬ table to God as reprefeuting Chrift’s one facrifice for the fins of the world. Our limits will not permit us to give even an abftraft of their arguments ; but the reader who fiiall attentively perufe ffohnfon’s unbloody Sacrifice and Altar unveiled andfupported, will difeover that their notions are better founded than probably he fuppofes, and that they are totally irreconcileable with the doftrine of tran- fubftantiatiqn and the Popifti facrifice of the wafs. Other Englifh divines of great learning, with the cele-Qthert a brated Hoadley bilhop of Winclrefter at the head of them, mere me. contend ftrenuoufly that the Lord’s Supper, fo far fromn'0ml; E beintr CribiIndW,-iMrffrLpUd ,andXYa.ke/ bifhops Poynet, Andrews, Bull, and Patrick; the Boftors Hickes, * m ’ Meffis Eingham, Johnfon, Mede, Wheatly, Scandaret, Bowyer, kc- SUP [ 82 1 SUP facrifice of any kind, is nothing more than bread facrifice, and was fuppofed to convey to the partakers of Supper. ^ ^ 1 • 1 _ *4 ^ 1 1. 4- V> ^ -ToNTri'ixr T Pine (ianr tnPtr 1 t Supper, being a , and wine reverently eaten and drunk, in remembrance that Chriit’s body was broken and his blood ftied in proof of his Father’s and his own love to mankind ; that nothing is effential to the facrament but this remembrance, and a ferious defire to honour and obey our Saviour as our head; that the facrament might be celebrated without uttering one prayer or thankfgiving, merely by a fociety of Chri- {Uans, whether fmall or great, jointly eating bread and drinking wine with a ferious remembrance of Chnft’s death ; that St Paul enjoins a man to examine himfelf be¬ fore he eat of that bread and drink of that cup, not to difcover what have been the tins of his pall life in order to repent of them, but only that he may be fure or his remembering Chrift’s body broken and his blood fired ; that, however, it is his duty in that as in every other in- ftance of religious worfhip to refolve to obey from the heart every precept of the gofpel, whether moral or pofi- tive ; and that to partake worthily of the Lord’s Supper is acceptable to God, becaufe it is paying obedience to one of thefe precepts ; but that no particular benefits or privileges are annexed to it more than to any other in- ftance of duty. Bifhop Hoadley acknowledges, that when St Paul fays *, “ The cup of bleffing which we blefs, is it not the communion of the blood of Chrift ? The b ead which wre break, is it not the communion of the body of Chrift ?” he has been fuppofed by many learned men to affirm, that all the benefits of Chrift’s paffion are in the Lord’s Supper conveyed to the ■worthy communicant ; but this (fays he) is an idea which the apoftle could not have in his thoughts as at all proper for his argument. The Greek word and the Englifh communion figni- fy only a partaking of fomething in common with others of the fame fociety ; and the apoftle’s meaning (he fays) can be nothing more, than that in the Lord’s Supper we do not eat bread and drink wine as at an ordinary meal, but as memorials of the body and blood of Chrift, in ho¬ nour to him as the head of that body of which we are all members. That the word is not meant to denote any inward or fpiritual part of the Lord’s Supper, he thinks evident, becaufe the fame word is ufed with regard to the cup and the'table of idols, where no fpiritual part could he thought of, and in an argument which fuppoies $ A Tl’i” an idol to be nothing §. 'Account of To this view of the nature and end of the Lord’s Snp- the bJature muA appear no fmall objeflion, that “ he who eat- Lord'0/ eti1 and drinketh unworthily is faid to be gui/ty of the Now Jefus (fay they), the crofs ft I Car. 7. i<5. Svfper. body and blood of the Lord, anil to eat and drink a judge¬ ment to him ft f, not difcern'tng the Lord's body” No doubt it would be linful to eat and drink a mere memorial of Chrift’s death without ferious difpofitions ; but we cannot conceive how a little wandering of the theughts, which is all the unworthinefs which the author thinks there can be on fuch an occafion, fhould be a fin of fo deep a dye as to be properly compared with the guilt of thofe who mur¬ dered the Lord of life. Other divines therefore, feeling the force of this and fimilar objections, fteer a midale ^ CQurfe between the mere memoriaiift and the advocate for a And others,real facrifice in the holy Eucharift, and infift that this rite, a feaft upon though no facrifice itfelf, is yet a feaft upon the one facri- our’ffieri ^ce °^'ered ^7 Chrift and fiain upon the crofs. The molt fice.& iCn" eminent patrons of this opinion have been Dr Cudworth, bifhop Warburton, and the prefent bifhop of Cbefter ; and they fupport it by fuch arguments as the following: “ In thofe ages of the world when victims made lo great a part of the religion both of Jews and Gentiles, the facrifice was always followed by a religious feafting on the thing offered ; which was called the fead ufen, or after the it the benefits of the facrifice. about to offer himfelf a facrifice demption, did, in conformity to general praCtice, inftitute the lajl /upper, under the idea of a feaji after the facrifice ; and the circumftances attending its inftitution were fuch, they think, that the apoftles could not poffibly miftake his meaning. It was juft before his paffion, and while he was eating the pafchal fupper, which was a Jewifh feaji upon the facrifice, that our bleffed Lord inftituted this rite ; and as it was his general cuftom to allude, in his adions and expreffions, to what paffed before his eyes, or prefented it¬ felf to his obfervation, who can doubt, when, in the very form of celebration, we fee all the marks of a facrifi- tial/upper, but that the divine inftitutor intended it ihould bear the fame relation to his facrifice on the crofs which the pafchal [upper then celebrating bore to the oblation of the pafchal lamb ? If this was not his purpofe, and if nothing more was intended than a general memorial of a dead be- nefaClor, why was this xnftant of time preferred for the inftitution to all others throughout the courfe of his mini- ftry, any one of which would have been equally commodi¬ ous ? Indeed any other time would have been more com¬ modious for the inftitution of a mere memorial ; for the pafchal lamb and unleavened bread were certainly a facri- fi ce ; and the words ufed by our Saviour, when he gave the bread and wine to the apoftles, were Inch as muft ne- ceffarily have led them to confider that bread and wine as bearing the iame relation to his facrifice that the paichal fupper bore to the pafchal facrifice. At that Jewifh feaft, it was the cuftom of every father of a family to break the un¬ leavened bread, and to give to every gueft a portion, faying, “ This is the bread of affliCtion, which our fathers did eat in the land of Egypt a cuftom which, we may be lure, that Chrift, as father of his family, would religioufly ob- ferve. The apoftles knew well that they were not eat¬ ing the identical bread which their fathers did eat in Egypt, but the feaft upon the facrificc then offered in commemoration of their redemption from Egyptian bon¬ dage ; and therefore when they law their Mailer after fi ri¬ per break the bread again and give it to each of.them, with thefe remarkable words, “ This is my body which is given for you, do this in remembrance of me,” they muft have concluded, that his meaning was to inftitute a rit* which fhould to the end of the world bear the lame rela¬ tion to his facrifice that the pafchal fupper bore to the facrifice of the paffovtr. This inference, from the circumftances attending the in¬ ftitution, bifhop Warburton thinks confirmed by St Paul’s mode of arguing with the Corinthians, on their impiety and abfurdity in partaking both of the Lord’s table and the table of devils ; for “ what (fays he) had the eaters cf the facrifices to do with the partakers of the bread and wine in the Lord’s Supper, if the Lord’s Supper was not a feaft of the fame kind with their feafts ? If the three feafts, Jewiflr, Pagan, and Chriftian, had not one common nature, how could the apoftle have inferred that this in¬ tercommunity was inconiiftent ? Te cannot (fays he) drink the cup of the Lord and the cup of devils ; ye cannot be partakers of the Lord's table and the table of devils. Ecu* though there might be impiety in the promifeuous ufe of Pagan and Chriftian rites of any kind, yet the inconfjlency arifes from their having a common natuie, and confequent- ly, as they had oppoftte originals, from their deftroying one another’s effects in the very celebration. Sacrifices^ and feafts upon facrifices, were univerfally confidered as fe~ dtral rites ; and therefore the Lord’s table and the table of devils being both federal rites, the fame man could no more 8 fee Slipper, Supple¬ ment. SUP [ 83 1 SUP be partaker of both, than be could at once engage to ferve SUPPORTED, In heraldry, a term applied to the up- both God and the devil. This is the apoftle’s argument permoft quarters of a fhield when divided into fevcral quar¬ to the wife men, to whom he appeals ; and we fee that it ters, thefe feeming as it were fupported or fuilained by thofe turns altogether upon this poftulatum,that theChriftian and below. The chief is faid to be fupported when it is of two3 Pagan feafts had the fame fpecific nature, or were both colours, and the upper colour takes up two-thirds of it. In u feafts upon facrifices. If this be admitted, it is eafy to fee this cafe it is fupported by the colour underneath. Supple* meut I! pral apfa- mns. I *••****. -w J why St Paul deemed thofe who ate and drank unworthily guilty of the body and blood of the Lord ; for if the Lord’s Supper be a feall upon his facrifice, it mufl have been confidered as the means of conveying to the commu¬ nicants all the benefits of his death and pafiion ; and the profanation of fuch a rite, by rendering his deatli ineffec¬ tual, might be fitly compared and jultly equalled to the enormous guilt of thofe by whom his blood was fhed.” In reply to bifhop Hoadley’s remarks upon the word xoivaviaj his brother bifliop obferves, that “ had the apoftle meant what the learned writer makes him to mean, he would doubtlefs have faid \ju&v aq ra (Tu/Actj 4 your communion in the body—your eating it jointly.’ St Paul (continues he) knew how to exprefs himfelf properly, as appears from a paffage in his epiftle to the Philippians, where, pro feffedly fpeakingof the joint participation of a blef- fing, he ufes thefe words, xoivwhoc n<- to eua^xiov ‘your communion sn the gofpel.’ d o tne other remark, that no fpiritual part could be thought of in the table of idols, becaufe an idol is faid by the apoftle to be nothing, bifhop Warburton replies, “ that by St Paul the Gentiles are faid to have facriliced to devils, and thofe who ate of fuch fa¬ crifices to have had communion with devils : now the de¬ vil (continues his Lordfhip) was in St Paul’s opinion Jometbing.” But the inference which the apoftle draws fi-nm fiL oM.™ in 1 . V I , ^ T1- 'a’cl'vs LUC mmol moue, men me concord is called the fupetfiuous Which wc t ki"d “’,whe.n «*>? found is a SUPPORTERS, in heraldry, figures in an atchieve- ment placed by the fide of the fhield, and feeming to fup- port or hold up the fame. Supporters are chiefly figures of beafts : figures of human creatures for the like purpofe are called tenants. r SUPI OSII ION, in mufic, is when one of the parts dwells on a note, while another part makes two or more leffer notes equivalent to it, by conjoint degrees. Suppofitioa is defined by a late author the ufing of two fucceffive notes, of the fame value as to time ; the one where¬ of, being a difcord, fuppofes the other a concord. The harmony, Mr Malcolm obferves, is always to be full on the accented parts of the bar or meafure ; 'but, on the unaccented, difcords may tranfiently pafs, without any of¬ fence to the ear. This tranftent ufe of difcords, followed by concords, make what we, after the French, call>^yfrw«. Concords by fuppofition are thofe where the continued bafs adds or fuppofes a new found below the fundamental bals ; whence fuch concords always exceed the extent of the o(Slave. Of thefe concords there are three forts, all which are concords of the feventh : the firft, when the added found is a third below the fundamental found ; fuch is the con¬ cord of the ninth ; and if the concord of the ninth is formed by the mediant, added below the fenfible concord in the minor mode, then the concord is called the fuperjluous t Car, x. which we blefs is the communion of the blood of Chrift, and the bread which we break the communion of the bo- dy of Chnft, puts his meaning, our author thinks, be¬ yond all doubt. He fays f, that the partaking of one bread makes the receivers of many to become one body. , Llft 'inference, if this rite be of the nature of a fea/1 upon toe inn-ihrp • fnv tVipn • . .r .I 1 1 1 11 , fifth below the fundamental found, as in the concord of the fourth or eleventh ; and if the concord is fenfible, and the tonic be fuppofed, this concord is called the fuperjluous fe¬ venth. The third kind is that where the fuppofed found is below a concord of the diminifhed feventh : if it is a fifth below, e. if the fuppofed found be the mediant, the con- the .i • r r V , uruu u(-iuvv> e- 11 Iae xuppoicQ lounq be tne mediant, the con- cf 4R thettTt°lthRr'f .. i • J vjujr unii uiuuu UJ 6/jri/^umtes the receivers into one body by an equal dif- tnbution of one common benefit. But if it be only a ge¬ neral commemoration of a deceafed benefador, it leaves tne receivers as it found them, not one body, but many fe- parate prof jfors of one common faith. 1 bus have we given fuch a view as our limits would permit us to give, of the principal opinions that have been held refpethng the nature and end of the Lord’s Supper, derftood. It is an ordinance which feems not to be generally under- hood ; though, being intended to fhow forth the Lord’s Jeata till he come, it is furely of fufficient importance to engage the attention of every ferious ChriflianL The mofl: conliderable Proteftant divines who have exprefsly written unon it are. U' rr 11 , « . L 1 16 le ordx- nce not nerally unon it are TnW™ i • tt u , “ written as nave an averiion to the taking of cly i., his DifiJ/i LerJdeS fud,WOr‘h not thereof. in Vile Viaf r • ^ VvUawort in his Difcourfe concerning the true Nature of the Lord’s hd Rad J ^ m Account; and Warburton in * Rational Account. The notions of Cudworth and War- fiTiZt perhaPS th<7 "Ot fo much if it is a feventh below, i. e. if the fuppofM found be’Vtie tonic, the concord is called the lejfer fxth and Juperfluous fe¬ venth. J SUPPOSITORY, a kind of medicated cone or ball, which is introduced into the anus for opening the belly. It is ufually compofed of common honey, mixed up with either foap 01 oil, and formed into pieces of the length and thicknefs of the little finger, only pyramidal. To the coin- pofition is fornetimes alfo added powder of fcammony, eu- phorbium, colocynthis, fait, aloes, &c. according to the cafe of the patient. The fuppofitory was invented for the convenience of fuch as have an averfion to the taking of clyfters ; or to be ufed SUPPRESSION, in medicine, is generally ufed to figni- fy a retention of urine or of the menfes. SUPPU RA ITON, the fecond way wherein an inflam¬ mation terminates; being a converfion of the infpiffated from thofe of Johnfon as many reaSs Tem t • ^ ' TT a converfion of the infpiffated At any rate, the arguments bv wht-h Wa K 7^™’ b 0°d a"d ‘ ' firllgdJa“nt Parts> the veflels and fat into his dofirine tnuft hare feme force ii', b> ?"TT;rtS P“s ot matter ; wlt'ch dtforder, when it has not yet found See Table of the Hoadk^hhnLlf^cknowL^6 ^ is faId that an °Penin&> ,’s generally called an abfeefs abL if h TlfT TT T W°uld be unanfwer- SUPRACOSTALES, in anatomy real facrifice P 31 ^ death of Chrift was a Anatomv. 7 SUPPLEMENT in Ifteratnrp ^ j r i , ^UP^^L^PSARIANS, in theology, perfons who what is wanting in a book Xoks of va^ T" f 7 i G°d’ wlthr°f any regard to the good or evil fuch an appendao-e • but nnT T °f ^ari0lls kl^s require works of men, has refolved, by an eternal decree, fufira lat- arts and fciencesVhich from tbs mUch as a dictionary of fum, antecedently to any knowledge of the fall of Adam, fcnl fcience, C0“* °f -<*-"^Pendently of it to fare foR and to damn otherTl P without it. or, in other words, that God intended to glorify his juftice L 2 in S IT R t 84 1 S U R flspnfpi* jiatus 0 Surat. in the condemnation of fome, as well as his mercy in the fal- vation of others; and for that purpofe decreed that Adam fhould neceffarily fall, and by that fall bring himfclt and all his offspring into a date of ever kiting condemnation. Thefe are alfo called antAapfaries, and are oppofed to fub. lapfaries and infralapfaries. _ . r j n- According to the fupralapfarians, the objeft of predelti- nation is, homo creabilis et labilis ; and, according to the fublapfarians and infralapfarians, homo crcatus et lapfus. SUPRASPINATUS, in anatomy. See Table of the Mo fries in Anatomy. SUPREMACY, the fuperiority or fovereignty of the Skinr. See Sovereignty. SUR, or Shur (anc. geog.), a defert of Arabia Petrsea, extending between Paleftine and the Arabian Gulph ; into which the Ifraelites, after marching through the Red Sea, firft came (Exod. xv. 22.) Again (Numb, xxxiii. 8.), it is faid, that from the lea they went three days journey into the Wildernefs of Etham ; whence feme conclude that Etham and Shur are the fame wildernefs ; or only differ as a part from the whole, Shur being the general name, and Etham that part of it lying neared to the place of encampment of the fame name. ' We know fo little of the geography of thefe places that there is more room for difputation than for deci- fion. As to the route which the Ifraelites followed in their paflage through the Red bea, Mr Bryant, we think, has given the moll fatisfaftory account in his late work on the Plagues of Egypt. — Shur is now called SURAT, a city of Indotlan, belonging to Britain, on the wtftern coaft of the peninlula, a little to the northward of Bombay, and about 16 miles up the river Tappee. It is but of modern date, and is a molt remarkable inltance of the power of trade to bring wealth and population to any fpot where it can be brought to fettle. Towards the mid¬ dle of the hit century this place was only the retort of a few merchants, who, under the Ihelter of an old infignincant caftle, kid the firft foundations of a city now almoft as large and fully as populous as London within the walls, and con¬ taining many fine buildings of Indian architedilure, which is partly Gentoo and partly Morifquc. Thole of the great-^ ell note are fo contrived, that the gateway is defenfible againll any fudden irruption of a few armed men. The pri¬ vate apaitments lie backwards for the conveniency of the women, of whom the Moors are remarkably jealous. They are fond of having one room, in the midll ot which a foun¬ tain keeps playing, and which, by its noiie, lulls them to fleep, and refrelhes the room by its coolnefs; but thus a damp is produced, which would be very dangerous to Euro¬ peans. They have all® generally a faloon with fountains playing in it, which, with the variegated flower-beds, in which they are very curious, makes a beautiful profpeft. During the intenfe heats of fummer they have country re¬ tirements a little way out of town, where they refide, or go in parties to amufe themfelves. The ftreets are irregularly laid out ; but have one property which renders it agreeable to walk in them, viz. that a competent width being left at bottom, the upper ftories of the houfes projeft over one an¬ other in fuch a manner, that people may with eafe convcrfe from them ; by which means the ftreet is agreeably fnaded, at the fame time that a proper ventilation is not impeded, but rather promoted. The Ihops, notwithllanding the vail trade carried on in this great and populous city, have a very mean appearance, owing to the dealers keeping their goods in warehoufes, and felling by famples. No place is better fupplied with provifions than the city of Surat while its communication with the country remains open. Eefides the unbounded importation, by which every article is brought here in great abundance, the natural pro* Sant, du£lions of the fod are excellent, though lets cheap than in T' other parts of India, as at Bengal efpecially ; yet in that place, though the cattle ‘and poultry are bought originally at a very low rate, they turn out very dear by the time they are fed for the table. Here, however, all kinds of eatables may be had at a reafonable price, ready for immediate ufe, and as good as can be found anywhere, i he wheat of bu* rat is famous all over India for its fingular fubflance, white* nefs, and tafle ; and its ialkds and roots are like wife of an excellent quality. There are alfo many kinds of wild-fowl and other game to be had at an eafy rate ; but for .wines and fpirituous liquors they depend moftly on importation. . Surat was furrounded with a wall in a fhort time alter it had affumed the form of a town. The fortification, how¬ ever, wras meant only to prevent the incurfiors of the Mah- rattas, who had twice pillaged it; fo that the place was by no means capable of (landing any regular fiege. Even the caflle appears but a poor defence, being mounted with can¬ non here and there, without any order, or without any thing like an attempt towards military architecture. In this city, before the Eafl India company became in* veiled with the poffeflion of Bombay , was the preiidency of their affairs on the weflern coafl. For this vmrpofe they had a fa&ory eflablifhed there with great privileges by the Mogul government; and even after the prefidency was efla- bhfhed at Bombay, they continued a fadtory here at one of the befl houfes in the city ; which yet not being fpacious enough to contain their effects, they hired another at fome diilance from it, and nearer the water-fide, which was called the new fadlory. In the mean time, the city flourifhed, and became the centre of all the Indian trade, being much more frequented for the fake of foreign merchandize tlian for ei¬ ther the natural productions or manufactures of the country, though they alio made a confiderable part of its commerce. In fhort, there was fcarce any article of merchandize but what was to be found at all times in Surat, ahnoft as readily as in London itfelf. While the Mogul government was in its vigour, there was fuch a fhow of juftice kept up, as in- . duced merchants of all religions and denominations to take up their residence in the city. The Gentoos efpecially re- forted thither, in order to avoid the oppreffions ot their own government. Great care indeed was taken that no very fla¬ grant adts of oppreffion fhould be committed ; fo that, in what fometimes happened, appearances were at Jeafl kept up ; and the oppreffions of government were chiefly owing to the animofities and rivalfhip of the merchants themfelves. As an inilance of the great extent to which commerce was pufhed in Surat, we (hall here quote from Mr Grofe, what is faid by Captain Hamilton of a merchant named Abdulga- four, viz. “ That he drove a trade equal to the Eafl India company: for he had known him fit out in a year above 20 fail of (hips, between 300 and 800 tons, none of which had lefs of his own flock than L. 20,000, and fome of them L. 25,000. After that foreign flock was fent away, it behoved him to have as much more of an inland dock for the following year’s market.” On the deceafe of this mer¬ chant, the government feized on a million of his money; and his grandfon was not only deprived of all that he poffeffed, but barbaroufly murdered through the envy and treachery of his brother-merchants, and the rapacity of the governor. The city of Surat was taken and ruined by the Portu- guefe in 152c ; and it was not till after this misfortune that it became fuch a celebrated emporium. All the In¬ dian merchants who had been accuftomed to trade thither contributed to re-eftablifh it; but it was not till near a cen¬ tury after that it became the general ftiple of Indian and Europeaa ' S U R [85 Sunt, European merchandize ; when the Dutch appearing in the c!iargc' Indian ocean, Jiad deprived the Portuguefe of all their con. ' queds on that coaft, and almoil entirely ruined their trade. The Englifh eftahlilhed a factory here in 1609, the Dutch in 1616, and the French in 1665. procefs of time, the Indian feas being greatly infelted by pirates, a naval officer The furcoat is properly a loofe thin taffetv coaf with was appointed by the Mogul to keep them in awe. This arms embroidered or painted on it. Such al is worn bv officer was named StcMn(K) Mujoot, who had been chief of heralds, anciently alfo ufed by military men ove- their ar^ an Ethiopian colony fettled at Rajapore. Here he had col- mour to diftinguifh themfelves bv. ^ Jcfted feme veffiels ot confiderable force, and carried on fome . 1 S u R SLRCINGLE^ a girdle wherewith the clergy of the Surcingle church of England ufually tie their caflbcks. See Gir¬ dle. SURCOAI, a coat of arms, to be worn over body ar- Surf. mour. trade, till he was difpofleffed by the Mahrattas; upon which he repaired to Bombay, and afterwards to Surat, where he was appointed admiral on that flation to the Mogul, with a yearly revenue of about L. 36,000 Sterling. Though he had no power, independent of the marine, he feized on the caflle, encroached on the town, and appropriated to himfelf a third part of its revenues, under pretence of ar¬ rears due in his appointed revenue. Another third was paid to the Mahrattas, to prevent their depredations upon trade in the open country ; but they, not fatisfied with this ftj- pillation, watched an opportunity to plunder the town, which was kept in fubje&ion by Siddee Muffoot till his death, which happened in 1756. Siddee Muffoot was fucceeded by his fon, who foon ren¬ dered himfelf very difagreeable to the inhabitants. In 17 ;;8 the Englifh factory was greatly oppreffed by him, and the black merchants treated (fill worfe ; on which the latter ap¬ plied to Mr Ellis the Englifh chief at that time, defiring him to recommend it to the prehdency of Bombay to take the caftle by force out of the hands of the ufurper. This propofal proving agreeable, Admiral Pococke, who was then with his Icjuadron at Bombay, readily concurred in fuppoit- ing the expedition. The enterprise was conduced with the ulual fuccefs attending the Britifh arms; and Captain Mait¬ land the condu&or took poffeffion of the caftle w ith its re¬ venue in name of the Eaft India company, who were con¬ firmed in the government by grants from the Mogul. SUkCHARGE of the borest, is when a commoner puts more beafts in the foreft than he has a right to. See Surchjrgf. of Common, is a difturbance of common of pafture, by putting m0re cattle therein than the pafture and herbage will fuftain, or the party hath a right to do. This injury can only happen where the common is appendant or appurtenant, and of courfe limitable by law ; or where when in grofs, it is exprefsly limited and certain; for where a man hath common in grofs, yW non.bre, or without Hint, be cannot be a furcharge. In this cafe indeed there mull be left iufficieRt for the lord’s own beafts. . Yie^alarem(:dies for furcharging the common are by the lords diftrammg the furplus number, or by his bring¬ ing an addon of trelpafs, or by a fpecial aftion on the caff, Lft S a yf °mTnf ?ay be Plaintiff* The palW Pr°C"dinS “ ^ °f adm- Aht Pa“Ure hath the 2a the'eb, r “di STLuteT"0" agt ’ tdiftl.f ndh n;hhii i” baf nd d he has, he (hall then forfeit to the king the ffmenm ;S.ClttlC put in, and alf0 „ pay d^f0CT^ SURD, in arithmetic and algebra, denotes any number or quantity that is incommenlurable to unity : otherwifu- cdled an irrational number or quantity. See Algebra Part I. Chap. IV. " * 51 SURETY, in law, generally ftgnifles the fame with Bail. SURF, is a term ufed by feamen to exprefs a peculiar fwell and breaking of the fea upon the ffiorc. It fometimes forms but a ftngle range along the fhore, and at others three or four behind one another extending perhaps half a mile out to fea. The furf begins to affume its form at fome di- ftance from the place where it breaks, gradually accumula¬ ting as it moves forward till it gain, not uncommonly, in places within the limits of the trade-winds, a height of 15 or 20 feet, when it overhangs at top, and falls like a cafcade with gieat force and a prodigious noife. Countries where furfs prevail require boats of a particular con ft ruction very different from the greater part of tbofe which are built in Europe. In fome places furfs are great at high, and in cthei s at low water; but we believe they are uniformly molt violent during the fpring-tides. It is not eafy to affign the caufc of furfs. That they are affected by the winds can hardly be queftioned ; but that they do not proceed from the immediate operation of the wind in the places where they happen, is evident from this ci’cumftance, that the furf is often highelt and moft violent wheie there is leaft wind, and vice •oerfa. On- the coaft of Sumatra the higheft are expeiienced during the fouth-eaft moriloon, which is never attended with fuch gales as the north-weft. As they are moft general in the tropical lati¬ tudes, Mr Marfden, who feems to have paid much attention to the fubjeCt, attributes them to the trade-winds which prevail at a diftance from fhore between the parallels of 30 degiees north and fouth, whofe uniform and invariable ac¬ tion cauies a long and contlant fwell, that exifts even in the calmeft weather, about the line, towards which its di reft ion tends from either fide. This fwell, when a fquall happens or the wind frelhens up, will for the time have other fub~ iidiary waves on the extent of its furface, breaking often in a direction contrary to it, and which will again iubfide as a Cfl^^xi.rCtU^nS, w^tbout havi'ng'produced on it any perceptible effect. Sumatra, though not continually expofed to the fouth-eaft trade-wind, is not lo diftant but that its influence may be prefumed to extend to it; and accordingly at Poolo 1 eiang, near the fouthem extremity of the ifland, a conftant foutherly fea is obferved, even after a ftrong north-weft wind, i h.s mceffant and powerful fvvell rolling in from an ocean, open even to the pole, feems an agent adequate to the pro¬ digious effects produced on the coaft ; whilft its very fize contributes to its being overlooked. It reoouciiesalmoftall the difficulties which the phenomena feem to prefent, and in particular it accounts for the decreafe of the iurf during the north-weft m^nfoon, the local wind then counteracting the operation of the general one ; and it is corroborated by an obieivation, that the furfs on the Sumatran coaft ever begin to ( ) When the Abyffiman flaves are promoted to any office under the Mogul government, they are called Siddm, S U 11 [86 Surface, to break at their fouthern extreme, the motion of the fwell Surfeit. not being- perpendicular to the direftion of the (hore. This explanation of the phenomena is certainly plaufible ; but, as the author candidly acknowledges, objections may be urged to it. The trade-winds and the fwell occafioned by them are remarkably fteady and uniform ; but the furls are much the reverfe. How then comes an uniform caufe to pioduce unfteady effe&s ? In the opinion of our author it produces no uniteady ef- fefts. The irregularity of the furfs, he fays, is perceived only within the remoter limits of the trade-winds. But the equatorial parts of the earth performing their diurnal revolu¬ tion with greater velocity than the reft, a larger circle being deferibed in the fame time, the waters thereabout, from the ftronger centrifugal force, may be fuppoled more buoyant; to feel lefs reftraint from the fluggiih principle of matter; to have lefs gravity ; and therefore to be more obedient to external impulfes of every kind, whether from the winds or any other caufe. SURFACE. See Superficies. SURFEIT, in medicine, a licknefs with a fenfation of a load at the Ifomach, ufually proceeding from fome error in diet, either with regard to the quantity or quality of the food taken. Sometimes, however, a furfeit is only a ple¬ thora from indolence and full but improper feeding ; in which cafe perfpiration is defedive;, and eruptions form themfelves on the Ikin. A furfeit from animal food, as mufcles, putrid flefh, See. is beft remedied by the ufe of vegetable acids, which may be taken diluted with water, a vomit being premifed, and this even though a vomiting and purging both attend. When an excefs of feeding is the caufe, the prirr.ae vise Being evacuated, and the nature of the plethora attended to, that the load may be properly evacuated, the indication of cure will be, to recover the perfpiratory difeharge, conftftent with which diuretics may be ufed in preference to medicines which produce any other evacuation. ] s U R Surfeit, in farriery. See FarrieRy, § xix. Surfjit SURGE, in the fea-language, the fame with a wave. s II See Wave. ' r SURGEON, or Chirurgeon, one that profeffes the art of Surgery. In England there are two diftindb companies of furgeons now occupying the fciefice or faculty of furgery ; the one company called barbers, the other furgeons, which latter are not incorporated.—The two are united to iue, and be fued, by the names of mafters or governors and commonalty of the myftery of barbers and furgeons of London. 3 2 H. VIII. c. 42. No perfon ufmg any barbery or fhaving in London, (hall occupy any furgery, letting of blood, or other matter; drawing of teeth only excepted. And no perfon uling the myftery or craft of furgery (hall occupy or exercife the feat or craft of barbary, or (having, neither by himi'elf, nor any other for his ufe. 32 VIIL c. 42. By the fame ftatute, furgeons are obliged to have fxgns at their doors. The French chirurgeons being refufed to be admitted in¬ to the univerfities (notwithftanding that their art makes a branch of medicine), on pretence or its bordering a little on I butchery or cruelty, aftociated themfelves into a brother¬ hood, under the protedion of S. Cofmus and S. Damian: on which account, according to the laws of their inftitution, they are obliged to drefs and look to wounds the firft Monday of each month. They diftinguilh between a chirurgeon of the long robe and a barber-chirurgeon. The firft has ftudied phyfic, and is allowed to wear a gown. The (kill of the other, beftdes what relates to the management of the beard, is fuppofed to be confined to the more fimple and eafy operations in chi- rurgy ; as bleeding, tooth-drawing, &c. They were formerly diftinguiftied by badges : thofe of the long gown bore a cafe of inftruments ; the barber, a bafon. * SURGERY, THAT part of medicine which treats of difeafes to be cured or alleviated by the hand, by inftruments, or by external applications. Ch A p. I. iffbary of Surgery. That forgery was coeval with the other branches of medicine, or perhaps antecedent to any of them, will not admit of doubt. The wars and contentions which have taken place among mankind almoft ever fince their creation, 1 aeceflarily imply that there would be occafion for furgeons Surgery at. a very early period ; and probably thefe external injuries tifed' *>IaC~ would for fome time be the only difeafes for which a cure would be attempted, or perhaps thought practicable.—In the facred writings we find much mention of balfams, parti¬ cularly the balm of Gilead, as excellent in the cure of wounds; though at the fame time we are informed that there were iome wounds which this baliam could not heal. „ Concerning the furgery praCtifed among the Egyptians, Hiftory of Jews, and Afiatic nations, we know little or nothing. The it among Greeks were thofe from whom the art defeended to us, the Greeks, though they confefledly received it from the eaftern nations. The firft Greek furgeons on record are iEfculapius and his fons Podalirius and Machaon. iEfculapius flouridied about 50 years before the Trojan war; and his two fons diftin¬ guiftied themfelves in that war both by their valour and (kill Hite'; in cming wounds. This indeed is the whole of the medical (kill attributed to them by Homer ; for in the plague which broke out in the Grecian camp, he does not mention their being at all confulted. Nay, what is ftill more ftrange, tho* he fometimes mentions his heroes having their bones broke, he never takes notice of their being reduced or cured by any other than fupernatural means ; as in the cafe of iEneas, whofe thigh-bone was broken by a (lone caft at him by Dio- med. The methods which thefe two famous furgeons ufed in curing the wounds of their fellow-foldiers feems to have been the extrafting or cutting out the darts which inflided them, and applying emollient fomentations or ftyptics to them when necefiary : and to thefe they undoubtedly attri¬ buted much more virtue than they could poflibly poflefs; as appears from the following lines, where Homer deferibes Eurypylus as wounded and under the hands of Patroclus, who would certainly pradfife according to the dire&ions of the furgeons. Patioclus cut the forky fteel away ; Then in his hands a bitter root he bruis’d, The wound he wafh’d, the ftyptic juice infus’d. The clojing fl.Jh that inftant ceas’d to glow ; The wound to torture, and the blood to flow. TiU 'hap. I. SU RGERY. g Hiftory. Till the day? of Hippocrate? we know very little of what are to be applied, and the fra&ured member fomented with Hiftory. *" v was the praftice of the Greek fur^eons. From him, how- warm vannnr. ^nrlnnr ~v— '1 3 " -— r n— — * 7 — • ever, we learn, that the praftice of blood-letting, cupping, and fcarification, was known to them ; alfo the ufe of warm and emollient fomentations, iffues made with hot irons, pef- faries, injeftions, fumigations, &c. Hippocrates alfo gives dirte 1<5c|l h’an, publifhed a Syftem of Surgery, containing a defcription u'^’ ofthe various difeafes, accidents, and operations. Boerhaave paysthis authorthe followingcompliment: ///efuperavit omnest et nemo Mi banc difputal gloriam ; omnibus points quam hccce car ere pojfumus. About the fame period, A. Parey, a French- man, made feveial important additions to furgery, particular¬ ly in his collection of cafes of wounds, fra ft u res, and other accidents which occur during war. The ancients, who were ignorant of powder and fire-arms, are defective in this part of military furgery. Parey pretends to have lirft in¬ vented the method of tying with a needle and ftrong lilk- thread waxed the extremities of large arteries, after the amputation of a member. The ligature of the blood- veffels is, however, merely a revival of the ancient practice, which had tallen into dilufe : Throughout the dark ages, the hot iron, cauteries, and ftrong aftrinpents, were fubfti- tuted in its place. B. Maggius and L. Botallus wrote on the cure of gunfhot wounds. J. A. Cruce wrote a fyftem g of furgery. Fn the 17th In the 17th century, furgery was enriched with feve- «.entury. j-jJ fyftems, and with detached or mifecllaneous obferva- G E R Y. ced, and the miferable patient is thrown alive into the fca, upon the furgeon’s declaring his wound to be mortal. There are, befides, many inftances on record, where wounds have healed, which the moft Ikilful furgeons have deemed mortal. The following wounds may be reckoned mortal. _ 7 1. Thole which penetrate the cavities of the'heart, and Wounds all thofe wounds of the vifeera where the large blood-veffels are are opened ; becaufe their fituation will not admit of pro-^^11^ per applications to reftrain the flux of blood. 2. Thole which obftruCl or entirely cut off the paffage of the nervous influence through the body. Such are wounds of the brain, cerebellum, medulla oblongata, and fpinal marrow; though the brain is fometimes injured, and yet the patient recovers. Wounds like wife of the fmall blood-veffcls within the brain are attended with great danger, from the effufed fluids prefling upon the brain. Nor is there lefs danger where the nerves which tend to the heart are wounded, or entirely divided ; for, affer this, it is impoflible for the heart to continue its motion. 3. All wounds which entirely deprive the animal of the faculty of breathing. 4. Thofe wounds wdiich interrupt the courfe of the chyle to the heart ; fuch are w'ounds of the receptacle of the chyle, thoracic du£i, and larger laSeals, See. 5. There are other wounds which prove fatal if negletffed and left to nature : fuch are wounds of the larger external blood velfels, w'hich might be remedied by ligature. ^ In examining woynds, the next conftderation is, whether gvniprom, the parts injured are fuch as may be fuppofed to induce dan-of wounds gerous fymptoms, either immediately or in fome time during 'n different the courfe of the cure. In order to proceed with any ^ degree of certainty, it is neceffafy to be well acquainted ^ with thofe fymptoms which attend injuries of the different parts of the body. If the fkin only and part of the cellular fubftance is divided, the hi ll confequence is an effufion of blood ; the lips of the wound retract, become tumefied, red and inflamed, leaving a gap of conliderable wddenefs according to the length and deepnefs of the wound. Be-0f wu*: ^1S ri^e he ought always to lay dawn to , to drdw the moft favourable prognofis the cafe will ^ear, or even more than the rules of his art will allow. partt,cularly incumbent on him in fea-engagements, “teria £xec“cd as ed up with a cake of coagulated blood. Below this cake,ft&nce* the finall veffels pour forth a clear liquor, which in a ftiort time is converted into pus (fee the articles Pus and Mu¬ cus). Below this pus granulations of new flefh arife, the cake of coagulated blood loofens, a uew {kin covers the place where the wound was, and the whole is healed up ; only there remains a mark, called a cicatrix or /ear, {bowing where the injury had been received. I9 All wounds are accompanied with a confiderable degree Of the muf# of pain, elpecially when the inflammation comes on, though^5* the divifion reaches no farther than the fion and cellular fubftance. If the mufcular fibres are divided, the pain is much greater, becaufe the found part of the muicle is ftretched by the contra&ion of the divided part and the ac¬ tion of the antagonift mufcle, which it is now lefs fitted to bear. The wound alfo gaps much more than where the cellular fubftance only is divided, infomuch that, if left to itfelf, the fkin will cover the mufcular fibres, without any intervention of cellular fubftance; and not only a very un- fightly cicatrix remains, but the ufe of the mufcle is in fome meafure loft.—If the mufcle happens to be totally divided, its parts retraft to a very confiderable diftahee ; and unlefs proper methods be taken, the ufe of it is certainly loft ever afterwards. . . If by a wound any confiderable artery happens to be di-Oft”ar* vided, the blood flows out with gieat velocity, and by Series. flares; the patient foon becomes faint with lofs of blood ; M no;- * 9° Simple Wounds. S U R G nor does the haernorrhagy flop until he faints away altoge¬ ther, when the ends of the divided veffel clofe by their na- —turaj contraftility ; and if as much vis vita ftill remains as is fufficient to renew the operations of life, he recovers after fome time, and the wound heals up as ufual. The part of the artery which is below the wound in the mean time be¬ comes ufelefs, and its Tides collapfe, fo that all the in¬ ferior part of the limb would be deprived of blood, were it not that the fmall branches fent off from the artery above the wounded place become enlarged, and capable of carry- ing on the circulation. Nature alfo, after a wonderful man¬ ner, often produces new vefiels from the fuperior extremity of the divided artery, by which the circulation is carried on as formerly. However, the confequences of fuch a profufe hsemorrhagy may be very dangerous to the patient, by in¬ ducing extreme debility, polypous concretions in the heart and large veflels, or an univerfal dropfy. Ihis happens efpecially where the artery is partially divided ; becaufe then the vefiel cannot contract in fuch a manner as to clofe the orifice : however, if the wound is but fmall, the blood gets into the cellular fubftance, fwelling up the member to an extreme degree, forming what is called a' diff'ufed anewifm. Thus the hsemorrhagy foon flops externally, but great mif- chief is apt to flow from the confinement of the extravafa- ted blood, which is found to have the power of diflblving not only the fldhy parts, but alfo the bones themfelves ; and thus not only the ufe of the limb is entirely loft, but the patient is brought into great danger of his life, if proper ia affiftance be not obtained in a fhort time. O1' the li- Wounds of the ligaments, nerves, and tendons, are like- g^ments w;fe attended with bad confequences. When a nerve is en- itridwis tirely divided, the pain is but trifling, though the confe- quences are often dangerous. If the nerve is large, all the parts to which it is diftributed below the wound immediately lofe the power of motion and fenfation ; nor is it uncom¬ mon, in fuch cafes, for them to be feized with a gangrene. This, however, takes place only when all or the greateft part of the nerves belonging to a particular part are divided. If the fpinal marrow, for inftance, be divided near the head, the parts below foon lofe their a&ion irrecoverably; or if the bundle of nerves pafling out of the axilla be divided or tied, fenfation in the greateft part of the arm below will probably be loft. But though a nerve ftiould be divided, and a temporary pally be produced, it may again reunite, and perform its former functions. If a nerve be wounded only, inftead of being divided, the worft fymptoms frequently ^ „ enfue. Of the tho- Wounds which penetrate the cavities of the thorax are rax. and the always exceedingly'dangerous, becaufe there is fcarce a pof- •vi.ceva fibility of all the vifeera efcaping unhurt. A wound is whit . it Hicwn to have penetrated the cavity of the thorax princi¬ pally by the difeharge of air from it at each infpiration of the patient, by an extreme difficulty ofbreathing, coughing up blood, &c. Such wounds, however, are not always mor¬ tal ; the lungs have frequently been wounded, and yet the patient has recovered.—Wounds of the diaphragm are al- moft always mortal, either by inducing fatal convulfions immediately, or by the afeent of the ftomach, which the preflure of the abdominal mufcles forces up through the wound into the cavity of the thorax; of this Van Swieten gives feveral inftances. — Even though the wound does not penetrate into the cavity of the thorax, the very worft fymp¬ toms may follow. For if the wound defeends deeply among the mufcles, and its orifice lies higher, the exuavafated hu¬ mours will be therein colle&ed, ftagnate, and corrupt in fuoh a manner as to form various finufes ; and after having ero¬ ded the pleura, it may at length pafs into the cavity of the thorax. The matter having once found a vent into -this.cavity, contains. E R Y. Chap. If, will be continually augmenting from the difeharge of the ft- pimple nuous ulcer, and the lungs will at laft fuffer by the furrounding matter. If, in cafes of wounds in the thorax, the ribs or'^Y^J fternum happen to become carious, the cure will be extreme¬ ly tedious and difficult. Galen relates the cafe of a lad who received a blow upon his fternum in the field of exercife : it was fir ft negletfed, and afterwards badly healed-, but, four months afterwards, matter appealed in the pai t which had received the blow. A phyfician made an inciiion into the part, and it was foon after cicatrized : but in a fhort time a new colle&ion of matter made its appearance, and upon a fecond incifion the wound refufed to heal. Galen found the fternum carious ; and having cut off the difeafed part, the pericardium itfelf was obferved to be corroded, fo that the heart could he feen quite naked ; notwithftanding which, the wound was cured in no very long time. There is fometimes difficulty in determining whether the wound has really penetrated into the thorax or the abdo¬ men ; for the former defeends much farther towards the fides than at the middle. But as the lungs are almoft al¬ ways wounded when the cavity of the thorax is penetrated, the fymptoms arifing from thence can fcarcely be miftaken. —Another fymptom which frequently, though not always, attends wounds of the thorax, is an emphyfema. This is occafioned by the air efcaping from the wounded lungs, and infinuating itfelf into the cellular fubftance; which being pervious to it over the whole body, the tumour paffes from ope part to another, till at laft every part is inflated to a fur- prifing degree. An inftance is given in the Memoirs of the Royal Academy, of a tumour of this kind, which on the thorax was eleven inches thick, on the abdomen nine, on the neck fix, and on the reft of the body four ; the eyes were in a great meafure thruft out of their orbits by the inflation of the cellular fubftance; and the patient died the fifth day. This was occafioned by a ftab with a fword. ,4 Wounds of the abdomen are not lefsr dangerous thanoftheal' thofe of the thorax, on account of the importance of the domenarJ vifeera which are lodged there. When the wound does notlts Vlfar! penetrate the cavity, there is fome danger of an hernia hew¬ ing formed by the protrufion of the peritonaeum through the weakened integuments, and the danger is greater the larger the wound is. Thofe wounds which run obliquely betwixt the interflices of the mufcles often produce finuous ulcers of a bad kind. For as there is always a large quantity of fat interpofed everywhere betwixt the mufcles of the ab¬ domen, if a wound happens to run between them, the ex- travafated humours, or matter there colledled, not meeting with free egrefs through the mouth of the wound, often makes its way in a furprifing manner through the cellular fubftance, and forms deep finuofities between the mufcles ; in which cafe the cure is always difficult, and fometimes impoffible. If a large wound penetrates the cavity of the abdomen-, fome of the vifeera will certainly be protruded through it or if the wound is but fmall, and clofed up with fat io that none of the inteftines can be protruded, we may know that the cavity of the abdomen is pierced, and probably iome of the vifeera wounded, by the acute pain and fever, palenefs, anxiety, faintings, hickcough, cold fweats, and weakened pulfe, all of which accompany injuries of the internal parts. The mifehiefs which attend wounds of this kind proceed not only from the injury done to the vifeera themfelves, but from the extravafation of blood and the difeharge of the contents of the inteftines into the cavity of the abdomen.; which, being of a very putrefeent nature, foon bring on the moft violent diforders. Hence wounds of the abdominal vifeera are very often mortal. This, however, is not always the cafe? lot the fmall inteftines have been totally divided, and Chap. IT. S U R and yet t’ne patient has- recovered. Wounds both of the fmall and large inteftines have healed fpontaneoufly, even when they were of fuch magnitude that the contents of the inteftine was freely difcharged through the wound in it, and after part of the inteftine itfelf has been protruded through the wound of the integuments. When the mefentery is injured, the danger is extreme, on account of the numerous veflels and nerves fituated there. Wounds of the liver, fpleen, and pancreas, are alfo exceed¬ ingly dangerous, although there are fome inftances of the fpleen being cut out of living animals without any conftder- able injury. From the preceding account of the fymptoms attending wounds in the different parts of the body, the furgeon may be enabled to judge in fome meafure of the event; though it muft always be remembered, that wounds, even thofe which feemed to be of the fiighteft nature, have, contrary to all expeftation, proved mortal, chiefly by inducing con- vulfions, or a locked jaw; fo that no certain prognoftic can be drawn on fight of recent wounds. We fhall now, how- r j ever, proceed to confider their treatment. Treatment For the cure of wounds, it has been already obferved, of wounds, that the ancients imagined balfams, the juice of herbs, See. to be a kind of fpecifics. In after-ages, and in countries where balfams are not eafily to be procured, falves have been fubftituted in their place ; and even at this day there are ma¬ ny who reckon a falve or ointment eflentially neceftary for healing the flighteft cut. It. is certain, however, that the cure of wounds cannot be efFefted, nay, not even forwarded in the leaft, by ointments, unlefs in particular cafes or by accident. Tl hat power which the human frame has of re- pan ing the injuries done to itfelf, which by phyficians is called v/s medicatrix natufXy is the foie agent in curing ex¬ ternal injuries ; and without this the moft celebrated balfams would prove ineffe&ual. When a wound has been made with a fharp inftrument, and is not extenfive, if it be imme¬ diately cleaned, and all the extravafated blood fucked (a) out, it will almoft always heal by the firft intention in a very ftiort time. Indeed the cures performed by this fimple pro- cefs are fo fuvprifing, that they would be incredible were we Hot afttired of their reality By eye-witneffes. When this pro- cefs is either negleaed or proves unfuccefsf ul, there are three ftages to be obferved in the cure of a wound: the firft, called digejlion, takes place when the ends of the wounded veffels con- ttaa themfelves, and pour out the liquor which is converted mto pus. As foon as this appears, the fecond fjage, in which the flefh begins to grow up, takes place ; and as this pro¬ ceeds, the edges of the wound acquire a fine bluifh or pearl colour, which is that of the new Hun beginning to cover the wound as far as the flefh has filled it uP. This procefs con¬ tinues, and the fkm advances from all fides towards the centre, which is called the cicatrizing of the wound. For t ie promoting of each of thefe procelfes, feveral ointments were formerly much in vogue. But it is now found, that no ointment whatever is capable of promoting them ; and that it is only neceffary to keep the wound clean, and to prevent the air from having accefs to it. This, indeed, na¬ ture takes care to go, by covering the wound with a cake of coagulated blood ; but if a wound of any confiderable • magnitude fhould be left entirely to nature, the pus would form celow the cruft of coagulated blood in fuch quantity, that it would moft probably corrupt, and the wound dege- ««ate into a corroding ulcer. It is neceffary, therefore, to G E R Y. cleanfe the wound frequently ; and for this purpofe it will be proper to apply a little ointment fpread on foft feraped hnt. For the firft drefiing, dry lint is ufually applied, and ought to be allowed to remain for two or three days, till the pus is perfeftly formed ; after which the ointment may be applied as juft now diredted ; and, in a healthy body, the wound will heal without further trouble. As to the oint¬ ment employed, it is almoft; indifferent what it be, provided it has no acrid or ftimulating ingredient in its compofition. But though, in general, wounds thus eafily admit of a cure, there are feveral circumftances which require a diffe¬ rent treatment, even in fimple divifions of the flefhy parts, when neither the membianous nor tendinous parts are in¬ jured. i'hefe are, i. Where the wound is large, and gapes very much, fo that, if allowed to heal in the natural way, the patient might be greatly disfigured by the fear. It is proper to bring the lips of the wound near to each other, and to join them either by adhefive plafter or by- future, as the wound is more fuperficial, or lies deeper. 2. When foreign bodies are lodged in the wound, as when a cut is given by glafs, &c. it is neceffary by all means to extrafl them, before the wound is dreffed ; for it will never heal until they are difcharged. When thefe bodies are fitu¬ ated in fuch a manner as not to be capable ot being ex- traded without lacerating the adjacent parts, which would occaiion violent pain and other bad fymptoms, it is neceffa- ry to enlarge the wound, fo that thefe offending bodies may be eafily removed. This treatment, however, Ts chiefly ne« ceffary in gunfhot wounds, of which we fhall treat in the next fe&ion. 3. When the wound is made in fuch a man¬ ner that it runs for fome length below the fkin, and the bot¬ tom is much lower than the orifice, the matter colle&ed from all parts of the wound will be lodged in the bottom of it, where, corrupting by the heat, it will degenerate into a fiftulous ulcer. To prevent this, we muft ufe compreffes, applied fo that the bottom of the wound may fuffer a more confiderable preffure than the upper part of it. Thus the matter formed at the bottom will be gradually forced up¬ wards, and that formed at the upper part will he incapable of defeending by its weight; the divided parts, in the mean time, eafily uniting when brought clofe together. Indeed, the power which nature has of uniting different parts of the human body is very furprifing ; for, according to au¬ thors of credit, even if a piece of flefh be totally cut out, and applied in a fhort time afterwards to the place from whence it was cut, the two will unite. That a part cut out of a living body does not entirely lofe its vital power for fome time, is evident from the modern praftice of tranf- planting teeth ; and from an experiment of Mr Hunter’s at London, he put the teflicle of a cock into the bellv of a living hen, which adhered to the liver, and became con- nccied to it by means of blood-veffels *. We have there * c fore the greateft reafon to hope, that the divided parts of5/4 the human body, when clofely applied to each other, willn0ly- cohere without leaving any finus or cavity between them. However, if this method fhould fail, and matter ftill be col- kaed in the depending part of the wound, it will be necef¬ fary to make an opening in that part in order to let it out after which the wound may he cured in the common way! 4. During the courfe of the cure, it fometimes happens that the wound, initead of filling up with flefhy granula¬ tions of a florid colour, fhoots up into a glafly-like fubftance which nfes above the level of the furroundino- fkin, while M 2 ° at 91 Simple Wounds. ^ 00 Bee an account of the method of fuck; wounds in Mr John Bell’s Difcourfes on Wounds, Part I. Difcourfe v< 9 2 Simple Wounds. T5 Of the re- gimen of patients in wounds. *7 Of hemo: rha^ies from V ouuds. S U R G at the fame time, inftead of laudable pus, a thin ill-coloured and fetid ichor is difchar>;ed. In this cafe the lips of the wound lofe their beautiful pearl colour, and become callous and white, nor does the cicatrizing of the wound at all ad¬ vance. When this happens in a healthy patient, it general¬ ly proceeds from fome improper management, efpecially the making ufe of too many emollient and relaxing jnedieines, an immoderate ufe of balfams and ointments. Frequently nothing more is requifite for taking down this, fungus than drefling with dry lint; at other times deficcative pow¬ ders, fuch as calamine, tutty, calcined alum, &c. will be ne- celfary ; and fometimes red precipitate _ mercury mull be fifed. This laft, however, is apt to give great pain, if fprinkled in its dry Hate upon the wound ; it is therefore moil proper to grind it with fome yellow bahheon ointment, which makes a much more gentle, though at the lame time an efficacious efcharotic. I ouching the overgrown parts with blue vitriol is alfo found very effe£hial. Hitherto we have confidered the wounded patient as otherwife in a date of perfeft health ; but it mull be obfer- ved, that a large wound is capable of dilordering the fyftem to a great degree, and inducing dangerous diieaies which did not before exift. —If the patient is ftrong and vigorous, and the pain and inflammation of the fvound t reat, a confr- derable degree of fever may arife, which it will be neceffary to check by bleeding, low diet, and other parts of the anti- phlogiilic regimen, at the fame that the inflamed lips of the wound and parts adjacent are to be treated with emollient fomentations or cataplafms till the pain and fwellin? abate. On the other hand, it may happen, when the patient rs of a weak and lax habit, that the vis vitae may not be fufficrent to excite fuch an inflammation in the wound as is abfolutely neceffarv for rts cure. In this cafe, the edges of the wound look pale and foft ; the wound itfelf ichorous and bloody, ■without any flgne of flefhy granulations ; or if any new fk-fli jfhoots up, it is of the fungous glaffy kind above-mentioned. To fuch wounds ail external applications are vain ; it is ne- ceffary to ftrengthen the patient by proper internal reme¬ dies, among which the bark has a principal place, until tire wound begins to alter its appearance. In fuch perfons, too, there is fome danger of a heftic fever by the abforption of matter into the body when the wound is large ; and this will take place during the courfe of the cure, even when the appearances have been at firll as favourable as could be wifned. This happens generally when the wound is large, and a great quantity oi matter formed : for byr this drl- charge the patient is weakened ; fo that tne pus is no fooner formed, than it is by the abforbent veflels re-conveyed into the body, and feverifh heats immediately affedl the patient. For this the beft remedy is to exhibit the bark copieufly, at the fame time fupporting the patient by proper cordiais and nourifhing diet. Indeed, in general, it will be found, that, in the cafe of wounds of any conflderable magnitude, a more full and nouriftiing regimen is required than the pa¬ tient, even in health, has been accullomed to; for the dif- charge of pus alone, where the quantity is conflderable, proves very debilitating, if the patient is not ftrengthened by ■proper diet. And it is conftantly found, that the cure of fuch fores goes on much more ealily when the patient is kept in his ufual habit of body, than when his lyftem is much emaciated by a very low allowance ; and, for the lame reafon, purgatives, and whatever elfe tends to weaken the conftitution, are improper in the cure of wounds. Hsmorrhagies very frequently happen in wounds, either from a divifion of one large artery, or of a number of Imall ones. In this cafe, the firft kep to be taken by the furgeon is to efiedl a temporary ftoppage of the blood by means of .Simple Wounds, E R Y. Chap. II, compreffion. He is then to tie up all the veffels in the manner to be afterwards defcribed. . ^ When the principal arteries of a wound have been tied, and a little blood continues to be difeharged, but appears to come from fundry Imall veffels only, an experienced fur¬ geon is induced to think, that the neceffary compreffion of the bandages will in all probability effect a total flop* page of the haemorrhagy. In a general oozing of a fmall quantity of blood from the whole furface of a fore, and when no particular veffel can be diflinguifhed, there is a neceffity for trailing to this remedy ; but whenever an artery can be difcovered, of whatever fize it may be, it ought unqueilionably to be fecured by a ligature. Tut it frequently happens, that conflderable quantities of blood are diicharged, not from any particular veffel, but .lorn all the fmall arteries over the furface of the fore.^ In wounds of great extent, particularly after the extirpation of cancerous breafts, and in other operations where exteniive fores are left, this fpecies of haemorrhagy often proves very troublefome by being exceedingly difficult to fupprefs. Bleedings of this" kind feem evidently to proceed from two very different and oppofite caufes. 1'Eitlier from too great a quantity of blood contained in the veffels, or from an over-degree of tone in the veffels themfelves or, perhaps, from a combination of both thefe cauies. But, fecondiy. Such evacuations undoubtedly happen moft fre¬ quency in fuch conflitutions as are very relaxed and de¬ bilitated ; either from a particular {late of the blood, or from a want of tone in the containing veffels, or, in fome inffances* from a concurrence of both. In conftitutions perfedly healthy, on the occurrence of wounds even of the moil exteniive" nature, as foon as the larger arteries are fecured, ail the fmall veffels which have been divided are diminifhed, not only in their diameters, but alio in their length ; in confequence of which, they re¬ cede conffderably within the furface of the furrounding parts. This caufe of itfelf would probably, in the gfeateil number of inffances, prove fufficient for reltraining all lofs o( blood, from the fmaller arteries. Another very powerful agent how¬ ever is provided by nature for producing the fame effect.. From the 'extremities of the divided veffels which at firft dif¬ eharged red blood only, there now, in their contracted ifate, oozes out a more thin, though vifeid fluid, containing a great proportion of the coagulable parts of the blood ; and thia being equally diftributed over the furface of the wound, by its baifamic agglutinating powers has a very conftderabie in¬ fluence in reftraining all fuch hsemorrhagies. When a tedious oozing occurs in a patient young and vi¬ gorous, and where the tone of the mufcular fibres is evident¬ ly great, the rrofl effe&ual means of putting a ftop to the difeharge is to relax the vafcular fyftem, either by opening a vein in fome other part, or, what gives ftill mote immedi¬ ate relief, by untying the ligature on one of the principal ar¬ teries of the part, fo as to allow it to bleed freely: thofe vio¬ lent fpafmodic twitchings too, fo frequent after operations on any of the extremities, whefi they do not depend on a nerve being included in the ligature with the artery, are in this manner more -effeClually relieved than by any other means. By the fame means the patient, from being in a febrile heat and much confuied, foon becomes very tranquil: the violent pulfation of the heart and larger arteries abates, and the blood not being propelled with fuch impetuofity into the fmaller veffels of the part, they are thereby left at more li¬ berty to retrad. In the mean time the patient ought to be kept exceedingly cool; wine and other cordials fhould be ri¬ gidly avoided; cold water, acidulated either with the mine- Chap. II. S U R G Simple ral or vegetable acids, ought to be the only drink ; motion Wound*. 0f every kind, particularly of the part affefted, fhould be guarded againft ; and the wound being gently covered with fcft charpie, ought to be tied up with a bandage fo applied as to produce a moderate degree of preflure on the extremi¬ ties of the divided parts. As foon as a fufficient quantity of blood has been dif- charged, the wound being dreffed, and the patient laid to reit, a dofe of opium proportioned to the violence of the fymptoms ought to be immediately exhibited. It ought to be remarked, however, that in all fuch circumftances, much larger doles of the remedy are neceflary than in or¬ dinary cates requiring the life of opiates. Small dofes, in- ftead of anfwering any good purpofe, feem frequently rather to aggravate the various fymptoms ; fo that whenever they are here had recourfe to, they ought always to be given in quantities fufficient for the intended effect. But htemorrhagies of this nature happen much more fre¬ quently in relaxed enfeebled habits, where the folids have loll part of their natural firmnefs, and the fluids have ac¬ quired a morbid tenuity. In this cafe a moderate ufe of generous wine ought to be immediately prefcribed; for nothing tends fo much, in fuch circumftances, to reftrain lisemorrhagies, as a well dire&ed ufe of proper cordials. By tending to invigorate and brace the folids, they enable the arterial fyftem to give a due refiftance to the contained fluids ; and have alfo a conliderable influence in reftoring to the fluids that vifcidity of texture, of which in all iuch inftances we fuppofe them to be deprived. A nourilhing diet alfo becomes proper ; the patient ought to be kept cool; and the mineral acids, from their known utility in every fpeciesof hsemorrhagy, ought alfo to be prefcribed. Reft of body is here alfo proper ; and opi¬ ates, when indicated either by pain or fpafmodic affedlions of the mufcJes, ought never to be omitted. Together with thefe remedies adapted to the general fyftem, particular dreffings, appropriated to the Hate of the parts to which they are to be applied, have been found very beneficial. In healthy conftitutions, foon after the dif- charge of blood is over, the parts are covered with a vif- cid coagulable effufion from the mouths of the now retrac¬ ted arteries ; but in conftitutions of an oppoftte nature, where the iolids are much relaxed, the blood in general is found in fuch an attenuated ftate as to afford no fecretion of this nature. To fupply as much as poffible the deficiency of this na¬ tural balfam, difterent artificial applications have been invent¬ ed. Dulling tne part with ftarch or wheat-flour has fome- times been found of ufe, and gum arabic in fine powder has been known to anfwer when thefe failed. Applications of this kind, indeed, have been ufed with fuccefs in all iuen hsemorrhagies, with whatever habit of body they happen to be connefted; but they have always proved more particularly ferviceable in relaxed conftitutions, attended with an attenuated ftate of the blood and an en¬ feebled mufcular fyftem. Alcohol, or any other ardent fpi- rits, impregnated with as great a quantity as they can dif- iolve of mirrii, or any other of the heating vifeid rums, may be here ufed with freedom, though in conftitutions of an oppofite nature they ought never to be employed. The baliamum traumaticum of the (hops, a remedy of this na¬ ture, has long been famous for its influence in fuch cafes: whi h lind,lfcrim’nate Ufe °f thJs and fimilar applications donhtm i°ng Preva,!cd Wlth ft>me Petitioners, has un- ve.v |HmyiC ,n e mUch harm ; f°r as lhey are aft pofftffed of fve'rv fvm g Powers, they of courfe tend to aggravate , ) ptom m wounds connected with a tenfe Rate of E n Y. 93 fibres, when much pain, and efpccialiy when fpafmodic mui- Simple cular affe&ions prevail. , ^ ot‘n,is’, By a due perfeverancc in one or other of the plans here pointed out, it will feldom happen that hsemorrhagies of this nature are not at laft put a flop to : but when the con¬ trary does occur, when, notwith(landing the ufe of the re¬ medies recommended, a difeharge of blood ftill continues; to¬ gether with the means already advifed, an equal mode¬ rate preffure ought to be applied over the whole furface of the fore, to be continued as long as the neceffity of the cafe feems to indicate. In finiffiing the dreffings of fuch wounds, after the char- pie and compreffes have been applied, a bandage properly adapted to the part ought to conclude the whole, and in fuch a manner as to produce as equal a degree of preffure over the furface of the fore as polfible. But it now and then happens that no bandage whatever can be fo applied as to produce the defired effedt; and in fuch cafes the hand of an affiftant is the only refource ; which being firmly ap¬ plied over the dreffings, fo as to produce a very equal degree of preffure, will commonly luccecd when no other remedy is found to have much influence. Wounds of the nerves, tendons, and ligaments, are at-symptom* tended with much more violent fymptoms than thofe where which even coniiderable arteries are divided, and frequently re-4 nietime® fill every method of cure propofed by the molt fltilful prac-^^; ^ titioners. In the Ample procefs of blood-letting, it fre-unjra quently happens that the tendinous expanfion called the aponeurofis of the biceps mufcle is wounded, or even the tendon of that mufcle itfelf is pundlured, by the point of the lancet; or fometimes a nerve which happens to lie in the neighbourhood is partially divided. Any one of thefe wounds, though they are the fmallell we can well iuppofe to be given, are frequently very dangerous and difficult of cure. It fometimes immediately happens on the introduc¬ tion of the lancet, that the patient complains of a moll ex- quifite degree of pain ; and when this occurs, we may reil allured that either a nerve or tendon has been wounded. On fome occafions, by proper management, fuch as evacu¬ ating a confiderable quantity ©f blood at the orifice newly made, by keeping the part at perfe£l reft, and preferving the patient in as cool a ftate as poffible, the pain at firlt complained of will gradually abate, and at laft go off en¬ tirely, without any bad confequence whatever. At other times, however, this pain which occurs inftantaneoufly on the introdudiion of the lancet, inftead of abating, begins foon to increafe ; a fullnefs, or fmall degree of fwelling, takes place in the parts contiguous to the wound ; the lips of the fore become fomewhat hard and inflaraed ; and, in the courfe of 24 hours or fo from the operation, a thin watery ferum begins to be difeharged at the orifice. If, by the means employed, relief is not foon obtained,, thefe fymptoms generally continue in nearly the fame ftate- for two or perhaps three days longer. At this time the violent pain which at firft took place becomes ftifl more di- ftreffing ; but inftead of being ftarp and acute as before, it is now attended with tlie fenfation of a burning heat, which ftill goes on to increafe, and proves, during the whole courfe of the ailment, a fource of conftant diftrefs to the patient. The fullnefs and hardnels in the lips of the wound begin to increafe, and the fwelling in the neighbouring parts gradually extends over the whole members. The parts at laft become exceedingly tenfe and hard; an eryfipe- latous inflammatory colour frequently appears over the whole member; the pulfe by this time has generally be¬ come very hard and quick; the pain is now intente, the patient exceedingly reftiefs; twitchiugs of the tendons ©c> our Simple 'Wound* T9 Opinion* about the caufes of thefe fymp toms. Mr John Hunter’s opinion : but it has been attempted to be fhown, that tendons are al- ^ moft totally deftitute of fenfibility ; and it has therefore been fuppofed, that their being wounded can never account for the various fymptoms known to occur in fuch cafes, i here is great reafon however to think, that in different inftances the fame train of fymptoms have been 'induced by different - caufes ; that in one inftance a wounded nerve, and 111 others prick's of the tendons, have given rife to them, as we have al- ready fuppofed. , , f ^ ij In order to prevent as much as poiuole the conlequcnt ^jj^jj inflammation and other fymptoms which ufually enfue, a con-obvia^ liderable quantity of blood ihould be immediately difcharged^H at the orifice juft made : the limb, for feveral days at leait,^.^ ought to be kept in a ftate of perfed reft, care being at theW0UDi fame time taken to keep the mufcles of the part in as re. laxed a ftate as poffible : the patient Ihould be kept cool; on a low diet; and, if neceffary, gentle laxatives ought to be adminiftered. When, notwithftanding thefe means, the fymptoms, m- ftead of diminifning, rather become more violent ; if the lips of the orifice turn hard and more inflamed, it the pain becomes more confiderable, and efpeciahy if the fwelling begins to fpread, other remedies come then to be indica- ted. In this ftate of the complaint, topical blood-letting, by means of leeches applied as near as pofiible to the lips of the wound, frequently affords much relief; and when the pulfe is full and quick, it even becomes neceffary to evacuate large quantities of blood by opening a vein in fome other part. - The external applications ufually employed in this Itate of the complaint are warm emollient lomentations and poultices. In fimilar affedions of other parts no remedies with which we are acquainted would probably be found more fuccefsful; but in the complaint now under confidera- tion, all fuch applications, inftead of being produdive of any advantage, rather do harm. The heat of the part is here one of the moft diftreffing fymptoms ; and warm emol¬ lient applications rather tend to augment this fource of un- eafinefs. The lips of the wound alfo are rendered ftill more hard, fwelled, and of courfe more painful ; and the fwelling of the contiguous parts is increafed. The heft external re¬ medies are cooling aftringents, efpecially the faturnine ap¬ plications. The parts chiefly affeded being alternately co- vered over with cloths wet with a folution of faccharum fa- turni, and pledgits fpread with Goulard’s cerate, are kept more cool and eafy than by any other remedy hitherto ufed. The febrile fymptoms wdiich occur muft at the / fame time be attended to, by keeping the patient cool, on a low diet, preferving a lax ttate of the bowels ; and, if neceffary, far¬ ther quantities of blood ought to be evacuated.. On account of the violence of the pain, which is fome¬ times fo exceffive as to deftroy entirely the patient’s reft, opiates ought to* be freely exhibited ; and when twitchings of the tendons and other convulfive fymptoms fuperveiae, medicines of this kind become ftill more neceffary. In or¬ der, however, to have a proper influence in this ftate of the complaint, opiates ought to be given in very full dofes; otherwife, inftead of anfwering any good purpofe, they conftantly tend to aggravate the different fymptoms, not only by increafing the heat and reftleffnefs, but by having an evi¬ dent influence in rendering the fyftem more fufceptible than it was before of the pain and other diftrefiing effedls produ¬ ced upon it by the wround. It often happens, however, either frdm negkifting the wound or from improper treatment, that all thefe remedies are had io- courfe to without any advantage whatever; the fever, pain» - and 'hap II. 5 U,R Simple and fwelling of the parts continuing, convulfive afFedions of Wound'. the mufcles at laft occur, all tending to indicate the moll 1 imminent danger. In this fituation of matters, if we have not immediate recourfe to fome effedlual means, the patient will foon fall a victim to the diforder ; and the only reme¬ dy from which much real advantage is to be expected,.is a free and extenfxve divifion of the parts in which the orifice producing all the mifchief was at firft made. We know well, from the repeated experience of ages, that much more pain and diftrefs of every kind is commonly produced by the partial divificn either of a nerve or of a tendon, than from any of thefe parts being at once cut entirely acrofs. Now the intention of the operation here recommended, is to produce a complete divifion of the nerve or tendon we fuppofe to have been wounded by the point of the lancet, and which we confider as the foie caufe of all the fubfequent dittrefs. This operation being attended with a good deal of pain, and being put in practice for the removal of fymptoms from which it is perhaps difficult to perfuade the patient that much danger can occur, all the remedies we have men¬ tioned ffiould be firll made trial of before it is propofed : but at the fame time, care ought to be taken that the dif¬ order is not allowed to proceed too far before we have re¬ courfe to it; for if the patient ffiould be previoufly much weakened by the feveriffi fymptoms having continued vio¬ lent for any length of time, neither this remedy nor any other with which we are acquainted would probably have much influence. So foon therefore as the courfe already preferibed has been fairly tried, and is found to be inade¬ quate to the effects expe&ed from it, we ought immediately to have recourfe to a free divifion. of the parts chiefly af- 54 fefted. Treatment Wherever a wounded or ruptured tendon maybe fituated, if wounded the limb fliould be placed in fuch a manner as will moll ,r r ,!,ni readily admit of the retraced ends of the tendon being brought nearly together ; and when in this fituation, the mufcles of the whole limb in which the ^injury has happened mult be tied down with a roller, fo as to prevent them from all kinds of exertion during the cure, endeavouring at the fame time to keep the parts eafy and relaxed. Thus in a wound or "rupture of the tendon of the redlus mufcle of the thigh, the patient’s /eg ffiould be kept as much as pof- Able firetched out during the cure, while the thigh ffiould be in fome degree bent, to relax the mufcle itfeif as far as poffible. In fimilar affeftions of the tendo Achillis, the knee fhould be kept conftantly bent to relax the mufcles of the leg, and the foot Ihould be ftretched out to admit of the ends of the ruptured tendon being brought nearly into contad. A roller fliould be applied with a firmnefs quite fufficient for fecuring the mufcles and tendons in this fituation ; but care mull be taken to prevent it from impeding the circulation. With this view, fine foft flannel ffiould be preferred either to linen or cotton ; for being more elallic, it more readily yields to any fwelling with which the limb may be attacked. fl lie late X)r blonro was tne firll who gave any accurate diredions for the treatment of rupture in the large tendons; and it is perhaps given with more precifion, from his having himfelf experienced the effeds of this misfortune in the tendo Achillis. He ufed a foot-fock or flipper, made of double quilt¬ ed ticking, and left open at the toe ; f-. the heel of which a llrap went up above the calf of ti:e L .. A firong piece of the fame materials went round the calf, and was faftened with a lace. On the back part of this was a buckle, through which the llrap of the foot-fock was paired, >r rupcu ed tec Ions. G E R Y. 95 by which the calf could be brought down, and the foot ex- tended at pleafure. Befides there was a piece of tin ap-, ^ ‘ , plied to the fore part of the leg, to prevent the foot from getting into any improper pollure during fleep. Alter propofing to walk, he put on a Ihoe with a heel two inches deep ; and it was not till the expiration of five months that he ventured to lay afide the tin plate ; and he continued the ufe of the high heeled ffioe for two years. The whole ap¬ paratus is reprefented Plate CCCCXC1I. fig. 124. From this treatment a knowledge may be formed of the treatment neceflary to be followed in the laceration of ten¬ dons of other parts of the body. _ In wounds of the thorax, even though none of the vifeera Wounds of Ihould be wounded, we may yet reafonably expeft that a the thorax, confiderable quantity of blood will be extravafated ; and this, if very large, mull be evacuated if poffible. However, it ought to be particularly obferved, that this extravafated blood fliould not be difeharged before we are aflured that the wounded veflels have done bleeding. When the pulfe appears fufficiently ftrong and equal, the extremities are warm, no hickup or convulfion appears, and the patient’s ftrength continues, we may then know that the internal hasmorrhagy has ceafed, and that the means for difeharging the blood may now be fafely ufed. Matter, water, blood, &c. have fometimes vaniffied from the cavities of the thorax, and been afterwards difeharged by fweat, urine, &c. Yet this but feldom happens ; and if we were to trull to nature only in thefe cafes, it is certain that many would perilh from a deltru&ion of the vital vifeera by the extravafated and putrid blood, who by an artificial extraction of the fame blood might have been fared. Wounds of the abdomen mull be clofed as foon as poffible, and then treated as fimple wounds; only they ought to be dref- fed as feldom and expeditioufly as may be. A fpare diet, with other parts of the antiphlogillic regimen, is here abfolutely 26 neceffary. It fometimes happens, that, thro’ a large wound Wou^s of the abdominal integuments, the intelline comes out with-^na out being injured ; yet, if it remains for any time expofed to the air, the cafe is commonly very dangerous. The moll certain method, in all fuch cafes, is to return the protruded part as foon as poffible ; for although writers in general formerly recommended warm fomentations, &c. to be pre- vioully applied, the lateft authors upon this fubjeft confider the moil natural and proper fomentation to be that which is produced by the heat and moillure of the patient’s belly, and that therefore the inteftines, if no mortification has taken place, are to be cleared from extraneous matter, and imme¬ diately returned. When the wound of the abdomen is large, the intellines - ealily prolapfe, but are as eaiily returned. But when part of an- intelline has been forced through a narrow wound, the diforder is much more dangerous. For the prolapfed inteftine being diitended by flatus, or the ingelled aliments driven thither by the perillaltic motion, it will be inflamed, tumefied, and incapable of being returned through the llric- ture of the wound ; whence a lloppage of the circulation and gangrene will foon follow. In this cafe the utniolk care is to be taken to reduce the intelline to its natural fize. When this cannot be accompliffied by other means, fome pra&itioners of great eminence have even advifed the punc¬ turing of the intelline in different places in. order to dif- charge the flatus. This pra£lice has alfo been recommend¬ ed in an incarcerated hernia, but is exceedingly difapproved of by Mr Pott and later writers ; and it feems to be very dubious whether any good can poffibly arife from it. To punfture any part that is already inflamed, mult undoubted¬ ly add to the inflammation j and it is very improbable that the. o.'mp’e Wuinuif. * Part IT- XUfcourfe 4th and 5 th. tlie dJfcli&rgc of flatus procured by the punfturcs would at all be a recompenfe for the bad confequences produced by the increafed inflammation. The method of Celius is much more elieible : It is to dilate the wound fo as to reduce the intettine with eafe. Sometimes part of the inteftine is loft either by fuppuration or gangrene. In this cafe, all that can be done is to ftrike a fingle ftitch through the wounded bowel, and to fix it to the external wound by paffing the future alfo through the fides of the wound. The ends of the inteftine may perhaps adhere ; or at any rate the wound ■will continue to perform the office of an anus, out ot which the fasces will continue to be difeharged during life. The directions given by fome furgeons about inierting' the upper end of the gut into the lower, and Hitching them together, are perfectly impra&icable, as Mr John Bell has fhown in his important Difcourfes on Wounds*; and even it they ■were praCicable, would certainly produce new mortification, which could not but be fatal. When the omentum appears prolapfed, the fame general treatment is to be obferved ; only that, when it is dry and mortified, the dead part may fafely be extirpated.—W7e ffiall conclude the article of abdominal wounds with a cafe from the memoirs of the academy of fciences lor the year 1705, which (hows that we ought not to defpair, even though the moft defperate fymptoms flrould take place, as long as any vis vita; remains. A madman wounded himfelt in i8 different places of the abdomen. Eight of thefe pe¬ netrated the cavity, and injured the contained vifeera ; he had a diarrhoea, naufea, and vomiting, tenfion of the abdo¬ men, with difficult refpiration and violent fever, fo that his life was defpaircd of. During the firft four days he was blooded feven times ; and during the greateft part of the cure his diet confifted almoft entirely of flefh-broths, with the addition of fome mild vegetables. By thefe means he was not only cured of his wounds, but reftored to his right fenfes. Seventeen months after, he went mad again, and threw himfelf over a precipice, by which he was inftantly killed : on opening the body, the wounds were found to have penetrated the middle lobe of the liver, the inteftinum jejunum, and the colon. Such extraordinary cures are to be imputed, according to the fatisfadfory explanation of Mr J. Bell, to the abdo¬ men being perfedftly full, and conftantly fubjefted to ftrong preffure between the diaphragm and abdominal mufcles ; which keeps the parts contiguous to a wound clofely ap¬ plied to it, prevents the difeharge of faeces or even of blood in fome meafure, and gives an opportunity for a very fpeedy adhefion between the parts. Wounds of In wounds of the head, where the cellular membrane (the head. Gnly is affe&ed, and the aponeurofis and pericranium un¬ touched, phlebotomy, lenient purges, and the ule of the common febrifuge medicines, particularly thofe of the neutral tenfe the pain fo great, and the fymptomatie fever fo high, Cwtufcd that by waiting for the (low eflha of foeh means the tient runs a rifle from the continuance of the fever ; or elfe , ^ the injured aponeurofis and pericranium, becoming floughy, produce an abfeefs, and render the calc both tedious and troublefome. A diviiion of the wounded part, by a fimple jncifion down to the bone, about half an inch or an inch in length, will moft commonly remove all the bad fymptoms; and if’it be done in time, will render every thing elfe un- neceffary. , . • r i • • j , 28 The wounds penetrating into the cavities of the joints do Woundssj not feem at firft alarming ; yet, by expofure to the air, thethei® lining membrane of fuch cavities acquire fuch a degree of feniibility as to endanger life when they are large. _ As foon therefore as any extraneous body, pufhed into the joint, is removed, the admiffion of the external air is to be guarded againft as much as poffible. If the wound be not too large, this may be done by pulling the fkin over the wound of the joint; and, to prevent its retradlion, rather adhelive plafter, with proper bandaging, is to be uied. But when inflam¬ mation is come on, repeated and copious blood-letting, to- .■> ether with fomentations, become neceffary; and as the pain, in thefe cafes, is apt to be violent, opiates mutt be adminiftered ; but fhould matter be formed in the cavity of the joint, free vent muft be give to it. Sect. II. Of contufed and lacerated Wounds. When the fmall veffels arc broken by a blow with any hard inftrament without penetrating the fkin, at the fame time that the folid fibres of the part are crufhed, the in- jury is termed a contufwn: and when at the lame time the fkin is broken, it is termed a contufed and lacerated wound; becaufe in this cafe the parts are not fairly di¬ vided as with a knife, but torn afunder or violently ftretched. Every contufion therefore, whether the fkin is broken or Symg not, may properly be reckoned a wound; for where the3 of CO# 47 kind, generally remove all the threatening fymptoms. When the inflammation is gone off, it leaves on the fkin a yellowifh tint and a dry feurf, which continue until perfpiration takes them away ; and upon the removal of the difeaie, the wound immediately recovers a healthy afpedl, and foon heals with¬ out further trouble. But in the worft kind of theie wounds, that is, where a fmall wound paffes through the tela cellu- lofa and aponeurofis to the pericranium, the patient will admit ef more free evacuations by phlebotomy than in the former. In both, the ufe of warm fomentations is required; but an emollient cataplafm, which is generally forbid in the eryfipelatous fwellings, may in this latter cafe be ufed to great advantage. Where the fymptoms are not very prei- ling, nor the habit very inflammable, this method will prove Sufficient j but it fome time 3 happens that the fcalp is fo injury is fo flight that none of the contents of the fmall flonl veffels are extravafated, it fcarce deferves to be mentioned. The immediate confequence of a contuiion, therefore, is a fweUing, by reafon of the extravaiation juft mentioned ; and the fkin becomes difcoloured by the blood ftagnating under it: but as this fluid, even though covered by the fkin, can¬ not long remain in its natural ftate, it thence happens, that the contufed part foon lofes its florid red colour, and be¬ comes blue or black ; the thinner parts being in the mean time gradually taken up by the abforbent veffels, which at laft happens to the blood itfelf; the blue difappears, and is fucceeded by a yellowifh colour, fhowing that the blood is now diffolved ; after which the part recovers its former ap¬ pearance, and the rupturqd veffels appear to have united as though nothing had happened. « Thefe are the fymptoms which attend the flightefl kind of contufions ; but it is evident, that where the blow is fo violent as to rupture or crufh fome of the large nerves, ot blood-veffels, all the bad confequences which attend Ample wounds of thofe parts will enfue, and they will not at all be alleviated by' the circumftance of the fkin being whole. Hence it is eafy to fee how a contufion may produce ulcers of the worft kind, gangrene, fphacelus, carious bones, &c.; and if it happens to be on a glandular part, a feinhus or cancer is very frequently found to enfue. Even the viicera themfelves, efpecially of the abdomen, maybe injured by contufions to fuch a degree as to produce an inflammation, gangrene, or feirrhus* nay inftaut death, without rupturing the fkin. Sect. CVtap. Cun-fhot Wov.nds. 30 Extiidtion of the ball or other fo¬ reign bo¬ dies. ^ 3t Dilatation of the Wound. 3* Advantage ®f bleeding II. . S U R Sect. III. Of Gun-Jhot IVounds. * Gun-shot wounds can be confidered in no other light than contufed wounds. In thofe made by a mulket or pdtol ball, the moil immediate confiderations are, to extr'fl the ball, or any other extraneous body which may have lodged in the wounded part; and to (top the hemorrhagy, it there is an effuiion of blood from the rupture of fome conhderable artery. It is frequently neceflary to enlarge the wound in order to ext raft the ball; and it it has gone quite through, (pro¬ vided the iituation of the part wounded will admit oi its being done withfafety), the wound is to be laid freely open through its whole length ; by which means any extraneous body will be more readily removed, and the cure facili¬ tated. In order to get at the ball, or any other foreign matter, probing is to be ufed as fparingly as poffible : and this muft. evidently appear to any one who will only confider the na¬ ture of the fymptoms attendant on penetrating wounds of the bread or belly, either From a bullet or lharp inilrument; the thruding in a probe to parts under fuch circumdances being unavoidably a fredr dab on every repetition of iuch praftice. Wherever probing is neceflary, the finger is to be preferred as the bed and trued; probe, where it can be ufed. If a ball, or any other foreign body, happens t© be lodged near the orifice, or can be perceived by the finger to lie un¬ der the dein, though at fome didance from the mouth of the wound, we fhould cut upon it and take it out: but v-ben it is funk deep, and lies abfolutely beyond the reach of the finger, it mutt appear evident, upon the leaft redec- tion, that thruding, firft a long probe in qued of the bullet, and then, as has been piaftifed likewife, a longer pair of forceps, either with or v/ithout teeth, Into a wound of that kind, though with a fort of certainty to extraft it, mud ei¬ ther contufe, or irritate and inflame, the parts to a great de¬ gree; and confequently do as much, or more mifehief, than the ball did at firft by forcing its paffage fuch a length of way. And fhould they at the fame time lay hold of any confiderable artery or nerve along with the ball (which can fcarce ever fail of being the cafe), what (hocking confequen- ces would attend fuch a proceeding ! Nor would attempts of this fort be lefs injurious in cafe a bullet fhould happen to be lodged in the cavity ®f the belly or bread:. Such at¬ tempts are the lefs neceffary, becaufe a great number of in- llances have occurred, where balls have been quietly lodged in feverai parts of the body, till after many years they have worked themfelves a paffage towards the furface, and were very eafily extrafted ; and many where balls have been en¬ tirely left behind. In cafe the wound be occafioned by a mulket or piftol (hot, and of courfe but fmall, it will be neceflary to dilate it without delay, provided the nature of the part will admit of this witu faiety : for in wounds near a ioint, or in very membranous or tendinous parts, the knife, as well as forceps, fhould be-put under fome redraint ; nor fhould any more opening be made than what is abfolutely requifite for the free difeharge of the matter lodged within. Where the wounded perfon has not fuffered any great lofs blood, and this is generally the cafe, it will be advifable to open a vern immediately, and take from the arm a large quantity ; and to repeat bleeding as circumftances may jequire, the fecond, and even the third day. Repeated the beSinm’n2 dr2* after them many advan- .tirvn le'7 P’even.t a £ood deal °f pain and inflamma- ru 1 ’ r6-? any feyenlh afiaults, forward the digeftion, and Vo,. XVntparVr111*””3110”5' ^ 3 l0“g trai'1 °f 33 Regimen, 34 G E R Y. 97 complicated fymptoms which are wont other wife to ‘inter- Oun.lhot rupt the cure, miferably harafs the poor patient, and too oun ^ often endanger his life ; and even where the feverifh fymp¬ toms run high, and there is almoft a certainty that matter is forming, bleeding, in that ftate, is very frequently of great advantage. For the firft 12 days it will be proper to obferve a cool¬ ing regimen, Froth in refpeft of the medicines that may be preforibed, and the diet requifite for the fupport of nature. It is abfolutely neceflary likewife that the body be con- flantly kept open. Unlefs, therefore, nature does this office of herfelf, a ftool fhould be every day procured, either by emollient clytters, or fome gentle laxative taken at the mouth ; and whenever there is much pain in the wounded parts, immediate recourfe muft be had to opium. As to external applications, whatever is of a hot fpi- rituous nature is remarkably injurious on thefe occafions, and what no wounded part can in any degree bear. F he wound may be drefled with pledgits of any emollient oint- External merit ; the whole being covered with a common poultice, 3i’r‘lcatlons or, in fome cafes, the preparations of lead may be ufed. An opiate fhould now be adminiftered ; and the part affefted being placed in the eafieft and moft convenient potture, the patient fhould be laid to reft. The formation of matter, in every contuled wound, is an objeft of the firft importance ; for, till this takes place, there is often reafon to fufpeft that gangrene may happen. With a view to haften fuppuration, the warm poultices fhould be frequently renewed, and they fhould be continued till the teniion and fw^eiling, with which wounds of this kind are ufually attended, be removed, and till the fore has acquired a red, healthy, granulating appear¬ ance, when it is to be treated like a common ulcer. Gun (hot w'ounds are commonly covered from the begin¬ ning with deep floughs, and various remedies are recom¬ mended for removing them. Every appearance, however, of this kind with which they are attended proceeds entire¬ ly irom contufion ; and, excepting the injury be extenfive, the flough is not often perceptible, or it is io thin as to come away along wdth the matter at the firft or fecond drtffing. Although emollient poultices be extremely,uftful, they ought to be no longer continued than till the effefts already mentioned are produced; otherwife'they will not only relax the parts, but alfo produce too copious a difeharge of mat¬ ter, which is fometimes attended wdth great danger. A too copious flow of matter may proceed from different caufes ; but in whatever way it may have been produced, the prac¬ tice to be adopted muft be nearly the fame. Every-collec- tion which appears muft have a free outlet, and the limb laid in that pofture which will moil readily admit of its run¬ ning off. In fuch circumftances, nourifhing diet and Peru¬ vian bark in confiderable quantities are highly ufeful. When the difeharge continues copious, in fpite of every effort to check it, detached pieces of bone or fome extraneous matter are probably the caufe. In fuch a fituation nothing will leflen the quantity of matter till fuch fubflances be removed. The wound ought therefore again to be examined, and loofe bodies removed. Pieces of cloth have been known to be removed by fetons, wflien that method was prafticable, after every other method had failed. Opi-um likewufe is frequent¬ ly ufeful in checking an exceffive difeharge, when it happens to be kept up by irritation. Although no confiderable hemorrhagy may happen at firft hi gun-fhot wmiinds; yet after the floughs commonly produced upon fuch occafions have come off, fome confi¬ derable arteries may be expofed, and then a dangerous he¬ morrhagy may enfue. The hemorrhagy is often preceded by a great heat in the injured parts, and with a throbbing pulfatory pain. At this period it may frequently be pre- N vented 9 8 Poifoncd Wounds. 35 Scarifying improper, S IT R venteS by plentiful blood-lettincf, particularly local, if the hemorrhagy has fairly taken place, and from arteries of confiderable hze, nothing will do but the proper apphca tion of ligatures. As the difcharge in thefe cafes would often prove dangerous before the furgeon. could be procu¬ red, the attendants fhould be furnifbed with a tourniquet, with directions to apply it, upon the firlt appearance ot bI°Till of late years the fcarifying of gun-fhot wounds was a praftice which prevailed very univerfally among furgeons; and it was expefted by this, that the Houghs with which wounds are fometimes covered would fooner feparate, and that the cure would thereby be more readily performed. 3? JiiTordfica* tion. It is now, however, known, that this pra&tce, inftead .of being ufeful, very generally does harm by increafing the in¬ flammation. It fhould therefore be laid entirely afu.e. When a gun-fhot wound cannot eafily or fafely be laid open from one end to the other, perhaps it mriy be proper to in¬ troduce a cord through the fiuus. This, however, fhould not be attempted till the firft or inflammatory {fate of the wound is over : but when a cord cannot be properly intro¬ duced, on account of the fituation or direftion 6f the wound, eomprefiion may prove equally ufeful here as in cafes of punftured wounds. , . , , Mortification happening after gun-flvot wounds, is to be treated in the fame manner as if it had arifen from any other caufe, only bark is not to be promifcuoufly ufed; as, in ple¬ thoric habits, it may prove hurtful, though in debilitated re¬ laxed habits it will be extremely ufeful;. but even in fuch it fhould never be given while much pain and tenlion con¬ tinue.. G E R Y. Chap, in, But cautery ; which, together with a plentiful fuppuration, has, tnflamtrja. in different in fiances, appeared to anfwer the purpofe tffec-^nand tually ; at leaft, patients treated in this manner have eica-tioii ped, while others bit at the fame time .by the fame animal ^ have frrffered. The fooner the operation is performed, the more effeaual it is likely to prove ; but it ought not to be omitted, even though fome time has elapfed from the time that the wound was infliaed; for there is reafon to iuppofe that this poifon does not enter the fyftem. fo quickly as fe- veral others are obferved to do. Sea-bathing has been much recommended in all ages as a preventive ; but there are few well attefted cafes of its being attended with advantage. Many praaitioners depend much on mercury ; and as it can be ufed along with any other plan of treatment, it ought not to be negkaed. . t When wounds are poifoned by the application ot matter from certain fores, as thofe of the venereal or cancerous kinds, or from any of the vegetable poifons, it is better to remove the part affeaed immediately, than to undergo a courfe of medicines generally flow and often doubtful in their operations. ' The metallic poifons do not fall to be confidered in this place ; for however deleterious they may be when taken in¬ to the ftomach, they feldom appear to be otherwife hurtful, when applied to wounds, than by irritating or corroding the parts with which they come in contaa. CHAP. III. Inflammation and its Confequences*. Sect. I. Of Inflammation and Suppuration. Sect. IV. Of Poifoned Wounds. 37 O, PoiSON may be introduced into the fyftem various ways. Treatment The effeag of the ;fon introduced by the ftmgs ot iniedts 13 f, may frequently be prevented by applying Immed.ately vme- by .he bit/ gar or ardent fpirits. After inflammation has come on, the ©f animals. moft effeaual remedy is the wafhing the parts with cola water. The bite of a viper is not always dangerous ; but as we can never judge with certainty whether.the wound be poifoned or not, and as the poifon of this animal aaS very fpeedily upon the fyftem, its bad effeas ought to be pre¬ vented bv every poffible means. The injured part ought either to f>e cut out immediately, or deftroyed with the ac¬ tual or potential cautery. Formerly fuaion was much employed, and frequently with fuccefs: it fhould not, however, prevent the removal of the part. After the part has been removed, we fhould endeavour to produce a plentiful fuppuration. When the poifon appears to have entered the fyftem, the application of warm oil over the whole body has been extolled ; and it has been faid that advantage has been derived from the in¬ ternal ufe of it. From fome late obfervations, however, the efficacy of this remedy is much to be doubted. . Perhaps a plentiful fweat, kept up for a conliderable time, is the. molt certain method yet difeovered. Small dofes of volatile a- kali frequently repeated is more to be depended on for pro¬ ducing this effeft than any other icmedy. . ,. The bite of a mad animal occafions the moft formidable Irom tne poifoned wound known in this country. In thefe wounds hy- bireof mad drophobia indeed does not always enfue ; but when it does, animals. death is almoft certainly the confcquence. A variety o no- ftrums for preventing and curing this difeale have been mad forth to the public ; but there is fcarcely any. well attefted faft of any one of them proving ufeful. Nothing yet known can be depended upon but the immediate removal ot the in¬ jured part, either with the fcalpel or the actual or potential 3* Wounds from the Inflammation of any part is accompanied with increa- fed heat, rednefs, and painful tenfion. For the remote and proximate caufes of inflammation, together with the treat¬ ment of inflammatory difeafes, fee Phlegmafue, article Me.- 3? dicine. Inflammation is commonly divided into, two {pmnnflaau cies, the phlegmonic and erytbematic. The firft is diftinguiflt- ed by confiderable fwelling, throbbing pain, and circumfcri- bed bright red colour. The fecond by fuperficial fwelling, burning pain, dull red colour, apt to fpread, difappeanng when preffed, and quickly returning ; the part affetted is Frequently covered with fmall veficles. The comequences^^ of inflammation are fuppuration and gangrene, unlefs the^uei,ce.: inflammation be checked and terminated by refolution.—f^punt That an inflammation will terminate in fuppuration may beamU known from the length of time it has continued, from theS remiffion of the pain and hardnefs, the greater elevatipn of the fkin in the middle part, a change of colour from red to bluifh or livid, a flight fever with fhivering, and from a fluc¬ tuation of matter perceived on handling the part. 4, During the firft ftage of the inflammation, however, wewhe,rtfr ought, for the moft part, to endeavour to refolve it, or pre-iuton vent the fuppuration. Yet fome cafes muft be excepted, i'® . For inftance, thefe inflammatory fwellings which fometimes occur in fevers, or fucceed to them, ought always to be brought to fuppuration ; and it might be very dangerous to attempt a refolution of them. In fwellings of a fcrophulous nature, it is perhaps heft to do nothing at all, either with a view to refolve or fuppurate. Thus it might be dangerous to make ufe of repellent applications, at the fame time that it is by no means advifable to promote their fuppuratior.; the cure of fuch fwellings, when opened, proving always very troublefome ; while at the fame time it is known, that fuch fwellings may remain for a very long time without any rifle to the patient. In the lues venerea, too., as we are pofieffed of a certain antidote for the diforder, it is heft not to,attempt the fuppuration. of any buboes which may ap* Chap. III. S U R fcion, inflamma- ^r? as the cure of thffCi, when opened, very often prove, tirm and cxtremely troublefome ; and as their being opened cannot Suppura- contT;bute any thing towards their cure. ^ Von- , Where the inflammation is but beginning, and the fymp- ^ toms are not fo violent as to affek the general fyftem, to- Method of p;cal remedies, with a due attention to regimen, Oiten an- refo’.viiur fwer ;n refolving them. The firft thing to be attended to in^nuna- care 0f every inflammation, is the removal of the ex- -citing caufes, which ejther have brought on the inflamma¬ tion originally, or which may continue it after it is begun. -Such are extraneous bodies in wounds, pieces of fiadtured bones, luxations, &c, Ot all the various applications for an inflamed part, thofe of a fedative nature are chiefly to be de¬ pended upon ; and, next to thefe, emollients. Of the for¬ mer kind we may confider all the different preparations of lead diflblved in vinegar; together with vinegar itfelf, which generally adfs alfe as a fedative. Among the latter w^e may place the mild expreffed oils, as alfo the foft ointments made wuth thefe oils and pure wax. When we fpeak of fedative medicines, however, it mull not be underflood that all of that clafs are to be ufed indif- criminately. Thus opium, though one of the moft powerful of all fedatives, yet as its application, externally, to the hu¬ man body, is always attended with feme degree of irritation, however ufeful it may at times be found in home particular fpecies of inflammatory diforders, udll never, probably, as an external application, become of general ufe in thefe cafes. Warm emollient fomentations alfo, though powerful leda- tives, as tending more effedtually to remove tenfion and pain than perhaps any other remedy, are conftantly found to be improper where a refolution is to be wifhed for. Their conftant effedf is, either to bring the twelling to a fuppura- tion, or to relax the parts in fuch a manner as to render the removal of the diforder always exceedingly tedious. Mr Bell recommends the preparations of lead as proper applications, in cafes of external inflammation, win re we wifh for a refolution. The belt method of applying it, he fays, is in the form of a watery folution ; and he gives the fol¬ lowing fotmula: w 1^. Sacchar. faturn. ^fs.; folve in acet. pur.- $iv. ; et adde aq. fontan. diflillat. tbij. The addition of vinegar renders the folution much more complete than it otherwife would be ; and without it indeed a very confider- able proportion of the lead generally feparates and falls to the bottom. In making ufe of this folution in cafes of inflammation, as it is of confequence to have the parts affefted kept con llantly moift with it, cataplafms prepared with it and crumb of bread in general anfwer that intention exceedingly well. But when the inflamed part is fo tender and painful as not eafily to bear the weight of a poultice, which is frequently the cafe, pieces of foft linen moiltened with the folution an fwer the purpofe tolerably well. Both fhould be applied cold, or at leall with no greater warmth than is merely necef- iary tor preventing pain or uneafinefs to the patient: they fhould be kept almoft conilantly at the part, and renewed always before turning ftiff or hard. \V hen the tenfion and irritation on the fkm are confider- able, emollients are often attended with very great advan¬ tage : the parts affe&ed being, in fuch a ftate of the difor¬ der, gently rubbed over with any of the mild expreffed oils two or three times a-day, the tenfion, irritation, and pain- are often very much relieved, and the difeufiion of the tu, mor thereby greatly promoted. . ln everY cafe of inflammation, indeed, emollient applica¬ tions would afford feme relief. But as the preparations of lead, already recommended, prove in all inch diforders ft ill more advantageous; and as unguents of every kind tend conuderably to blunt the action of lead ; theie two lets of G E R Y. 99 remedies flrould as feidom as poffible be allowed to interfere^frm ma with one another ; and emollients fhould accordingly never be preferibed, but when the circumftances already mention- t;0ln> ed, of irritation, tenfion, and pain, are fo confiderable as to -—f-*-* render their application altogether neceffary.. When the part affedfed with inflammation is not very ten- der, or lies deep, applications of vinegar are often had re- courfe to with confiderable advantage ; the moft tfftdlual form of ufing it feems to be by way of cataplafm, made with the ftrongeft vinegar and crumb of bread. In fuch cafes, an alternate ufe of this remedy, with the faturnine folution, has produced more beneficial effefts than are commonly ob- ferved from a continued courfe ot any one of them. At the fame time that thefe applications are continued, blooding with leeches, or cupping and Scarifying, as near as pofflble to the part affe&ed, is generally of very great fervice ; and in no cafe of local inflammation fhould ever be omitted. In all fuch cafes, the whole body, but jnore efpecially the difeafed part, fhould be preferved as free as pofiible from every kind of motion ; and, for the fame reafon, the necefiity of a low cooling diet, in every inflam¬ matory diforder, appears obvious, as does alfo a total abfti- nence from fpirituous and fermented liquors. ^ In flight cafes of inflammation, a due perfeverance of the Blnrd-'et- feveral articles taken notice of will, in general, be found ting, when fufficient for every purpofe. But when there is likewife a : r.°Pcr ,or full, hard, or quick pulfe, with other fymptoms of fever, ge- ^ !mr' neral blood-letting becomes neceflary; the quantity of blood taken away being always to be determined by the violence of the diforder, and by the age and ftrength of the patient. Evacuation, however, fhould never be carried to a greater height than what is merely neceflary for moderating the fe¬ brile fymptoms ; for if fuppuration fhould take place after the fy ftem is too much reduced, its progrefs is thereby ren¬ dered much more flow and uncertain, nor will the patient be fo able to bear the difeharge that mufl enfue upon opening the abfeefs. The ufe of gentle laxatives, together with cool¬ ing diaphoretic medicines, are alfo attended with very good effedfs. Thefe different evacuations being premifed, the next ob- jedf of coniequence is to procure eafe and quietnefs to the patient ; which is often, in inflammatory cafes, of more real fervice than any other circumftance whatever. The moft effedfual remedy for this purpofe is opium; which, when pain and irritation are confiderable, as in extenfive inflamma¬ tions very frequently happens, fhould never be omitted. In large wounds,' efpecially after amputations and other capital operations, alfo in pundlures of all kinds, large doies of opium are always attended with remarkable good effedts. In all fuch cafes, however, opium, in order to have a proper in¬ fluence, fhould, as was obferved, be adminiflered in very .large dofes; otherwife, inftead of proving ferviceable, it feems rather to have the contrary effcdl; a circumftance which is perhaps the chief reafon for opiates in general ha¬ ving been very unjuftly condemned in every cafe of inflam¬ mation. By a proper attention to the different circumftances taken notice of, in the courfe of three or four days, and fome- times in a fhorter fpace of time, refolution of the tumor will in general begin to take place ; at leaft before the end of that period it may, for the moft part, be known how the diforder is to terminate. If the heat, pain, and other at¬ tending fymptoms abate, and efpecially if the tumor begins to decreafe, without the occcurrence of any gangrenous ap¬ pearances, we may then be almoft certain that by a continu¬ ance of the fame plan a total refolution will in time be ef- fedfed. But, on the contrary, if all the different fymptoms rather N 2 increafe; I GO Irflarnma- tion ard Suppura¬ tion. 44 Method of prompt'ng fu^ pura- tion. 45 Dry cup¬ ping. S U R G increafe ; and efpeciafly if the tumor turns larger, and fome- M'hat foft, with an increafe of throbbing pain; we may then ■with tolerable certainty conclude, that fuppuration will take place ; and fhould therefore immediately defift from fuch applications as were judged proper while a cure was thought praclicable by refolution, and endeavour to affift nature as much as pofilble in the formation of pus, or what is called maturation of the tumor. For this purpofe there is nothing better than to preferve a proper degree of heat in the parts. This is commonly done by the means of warm fomentations and cataplafms ; and when thefe are regularly and frequent¬ ly renewed, nothing, it is probable, could more effebfually a.nfwer the purpofe. But in the ordinary manner in which they are applied, by the' cataplafms being renewed only once, or at moft twice a day, they mull always, it is ima¬ gined, do more harm than good. I'or fo foon as the degree of heat they were at firft podelfed of is diffipated, the moii- ture kept up by them, with the confequent evaporation which enfues, muft always render the part a great deal cold¬ er than if it had been merely wrapped in flannel without the ufe of any fuch application. In order to receive all the advantages of fuch remedies, the part affeded fliould be well fomented with flannels pref- fed out of any warm emollient dec@dton, applied as warm ss the patient can eafily bear them, continued at leaft half an hour at once, and repeated four times a day. Immediately after the fomentation is over, a lar.^e emol¬ lient poultice fhould likewife be applied warm, and renewed every fecond or third hour at fartheft. Of all the forms re¬ commended for emollient cataplafms, a common milk and- bread poultice, with a proportion of butter or oil, is perhaps the moll eligible ; as it not only pofleffes all the advantages of the others, but can at all times be more eafily ob¬ tained. Roafted onions, garlic, and other acrid fubftances, are frequently made ufe of as additions to maturating cataplafms. When there is not a due degree of inflarnmation in the tu¬ mor, and when it appears probable that the fuppuration would be quickened by having the inflammatory fymptoms fomewhat increaled, the addition of fuch fubitances may then be of fervice ; but when ftimulants are neceffary in fuch cafes, a fmall proportion of drained galbanum, or of any of the warm gums, diflblved in the yolk of an egg, and added to the poultices, is a more certain form of applying them. Whenever the inflammation, however, takes place to a proper degree, fuch ftimulating fubftances never can be neceffary ; and in many cafes, it is apprehended, they may even do mifehief. In fuch tumors as, from their being poffefTed of little or no inflammation, are commonly faid to be ot a cold nature, as they are generally indolent, and proceed very flowly to fuppuration, plafters compofed of the warm gums are often had recourfe to with confiderable advantage. In fuch cafes, they are not only of ufe by the ftimulus and irritation they' occaflon, but by the heat which they tend to preferve in the part. They become particularly necefiary when the patient, by being obliged to go abroad, cannot have cataplafms fre¬ quently enough renewed, or fo conveniently applied ; but when fome fuch objection does not occur, the latter, for very obvious realons, fhould always be preferred. Dry cupping, as it is termed, that is, cupping without the ule of the fcarificator, upon or as near as pofuble to the part affefted, is frequently had recourfe to with advantage in promoting the fuppuration of tumors. It is only, how¬ ever, in fuch as thefe laft mentioned, where there feems to be a deficiency of inflammation, that it can ever either be neceflary or ufeful; but in all tumors of a real indolent na- E R Y. _ Chap. Ill, ture, and where there is ftill fome probability of a fuppu->rfl»mm». ration, no remedy is more efte&ual. _ _ g101' ^ Thefe different applications, under the reftriftions taken notice of, being continued for a longer or fhorter time, ac- cording to the fize of tire tumor, its fituation, and other cir- cumftances, a thorough fuppuration may in general at lail be expebfed. _ ^ Matter being fully formed in a tumor, is known by a ’-'e-gj,n, ^ miffion of all the fymptoms taking place; the throbbing ou-ter» pain, which before was frequent, now goes off, and the pa-formed, tient complains of a more dull, conftant, heavy pain : the tumor points at fome particular part, generally near to its middle; where, if the matter is not encylted, or deep feated, a whitifh yellow appearance is obferved, inftead of a deep red that formerly took place ; and -fluctuation ot a fluid un¬ derneath is, upon preffure, very evidently difeovered. Some¬ times, indeed, when an abfeefs is thickly covered with muf- cular and other parts, though, from concurring circumftan- ces, there can be little doubt of there being even a very confiderable collection of matter, yet the fluctuation cannot be readily diftinguifhed : it does not, however, often hap¬ pen, that matter is fo very deeply lodged as not to be dif¬ eovered upon proper examination. This, however, is a circumftance of the greatefl: confe- Qiience in praCtice, and deferves more attention than ia commonly given to it. In no part of the furgeon’s em¬ ployment is experience in former fimilar cafes of greater ufe to him than in the prefent ; and however Ample it may appear, yet nothing, it is certain, more readily di- ftinguiflies a man of obfervation and extenfive praCtice,. than his being able eafily to deleft colleftions of deep-feat- ed matter ; whilft nothing, on the contrary, fo material¬ ly affefts the charafter of a furgeon, as his having, in fuch cafes, given an inaccurate or unjuft, prognofts; as the event, in diforders of that nature, comes generally at laft to be clearly demonftrated to all concerned. Together with the feveral local fymptoms of the prefence of pus already enumerated, may be mentioned the frequent fhiverings to which patients are liable on its firft formation: thefe, however, feldom occur fo as to be diftinftly obferved, unlefs the collef.ion is confiderable, or feated internally in lome of the vifeera. 4.7 After the matter is fully formed, and the abfeefs brought Of o, to maturity, the only remedy is to open it, and give vent toabkA the pus it contains. In many cafes, indeed, nature will do the work, and abfeeftes, when fuperficially ieated. will cer¬ tainly burft of themfelves : but where the matter lies deep, we are by no means to wait for this fpontaneous opening ; i s the pus will acquire an acrimony before it can break through the integuments, which may prove very prejudicial to health. However, it is a general rule not to open abfcefles , till a thorough fuppuration has taken place ; lor, when laid open long before that period, and while any confiderable hardnefs remains, they commonly prove more troublefome, and feldom heal fo kindly. In fome cafes, however, it is neceflary to deviate from this general rule, and to open them a good deal fooner ; particularly in all fuch critical abicefies as occur in malignant fevers. Inlike manner, in the plague, we are commonly adviled to open fuch tumors, fo foon as they are at all tolerably ad¬ vanced, and not to wait till they are fully maturated ; as, from experience in thefe diforders, it is found to be of more confequence, for the removal of the original difeale, to have a quick difeharge of matter produced, than any harm the patient can ever fuffer from having a fwelling fomewhat pre¬ maturely laid open. In abfeeffes, alfo, fituated ou any of the joints, or upon either 1 Chap. 1 Inflamma ,d ' tiou a ^ tiu[ pura- I10P- 43 _ 5)’ cauftic, 49 the nife. , So sy a feton. III. S U R • cither o-f t!ie larre cavkiefl of the breaft ^nd abdomen, and more efpecially when they feem to run deep, they fhould al¬ ways be opened as foon as the leafl fluctuation of matter is „ difeovered. For, when the refiftance is on every fide equal, they juft as readily point inwardly as outwardly : and the confequence of a larpe abfeefs burfting into either of the large cavities, is well known moft frequently to prove fatal: An inftance of which, in the following cafe, with very little attention, might have been prevented. A furgeon of emi¬ nence, and of very extenfive pradvfice, was applied to by a young healthy-1 oking man, with a large abfeefs upon the left fide of his chtil. A fludfuation of a fluid was, upon preffure, very evidently difeovered; and it was agreed, by other two practitioners who were prefent, that an open¬ ing fhould be made to give vent to the matter. But the operator, being much engaged in bufinefs, could not fix on an earlier period for doing it than the third day from the patient’s applying to hirn : unluckily, however, the oa- tient died fuddenly in his bed the night before the abfeefs was to have been opened. On examining the body, the tumor had difappeared entirely, without any external open¬ ing being obfervable ; and, on opening the thorax, it was found to have burft inwardly upon the lungs, and produced immediate luffocation. In every other circumftance, however, except in the cafes alluded to, the rule in opening abfeeffes is, as was already remarked, lo allow a thorough fuppuration to take place, before any vent whatever be given to the matter ; and it being then determined to lay the colleftion open, the next queftion that occurs, is with refpedl to the manner of do¬ ing it. I Here are three ways of opening an abfeefs fo as to fdve an outlet to the matter; by cauftic, by incifion, or by the introduction or a feton. 1 he firft is more agreeable to ti- nnd patients, who are afraid of the pain of incifion, but is attended with fome inconveniences which render the method of incifion much preferable. Cauftic acds ftowly, and pro- c-uces a long continued pain ; befides, no kind of cauftic has yet been invented, the effeds of which can be confined to a certain determinate extent ; hence the patient is liable to fuffer much unneceffary pain, as the cauttics commonly empJoyed are either the lapis infcrnalis or lunar cauftic. 1 he abfeefs is to have a flip of adhefive plafter applied to it with a flit cut in it of a fixe fomewhat lefs than the opening is intended to be. This flit is to be filled with cauftic redu¬ ced into a powder, and wetted to make it ad more quickly A is then to be covered over with a plafter, and the whole is fecured with a firm eomprefs and bandage. The time neceflary for the cauftic to make a fufficient opening will depend upon the thicknefs of the fldn and ilrength of the cam ic ; but generally it requires feveral hours. When we firm that an etehar is made, it k to be foftened with any emolhen ointment until it can be readily feparated • alter id afont 0^'hVS 10 V dilcharScd> “<1 .bfedi treat- eu^as one opened by mcihon. an cf abfCen'ra hr k',ife is- to make an .ncidon of fuel, a frre as to give free vent to the matter Ihe openmg ,s to be made-in the under part of the iumoi quelttly “jl ';Z' 'hat> ^ f«on, is „0w fre- with lit tie pam, tntvin .I'1' of being attended *P : g vtu abfcefo m a gradual manner* G E R Y. i oi and completely preventing the accefs of the air, which, in Gangrene^ the other two methods, is often attended with bad confe- quences; and it frequently performs a cure in a much flutt¬ er time. There are various inftruments for introducing the feton: it may even frequently be done by a lancet and common probe ; but the inftruments reprefented in Plate CCCCLXXXV1L fig. i. and 2. are more frequently employed. One of thefe being threaded with glover’s foft lilk, is to be introduced through the upper part of the tumor ; but if the blunt one (fig. 2.) be employed, it will be necefifary to have the aflat- ance of a lancet ; the inftrument is then to be brought out at the under part of the tumor, and in this way the matter will be allowed to run gradually oft. .The ufual mode of drefiing an abfeefs the firft time is with dry lint. In the courfe of drefling, it will be proper to have regard to the fituation of the abfeefs, and as much as poffible to make the patient favour the difeharge by his ordinary pofture : and to this end alio, the difeharge muft: be alfifted by cornpreis and bandage : the comprefs may be made of foft old linen, applied according to the nature of the part and the feafon of the year. The frequency of drefling will depend on the quantity of difeharge : once ii> 24 hours is ordinarily fufficient; but fometimes twice, or perhaps three times, is necefl’ary. Sect. II. Of Gangrene. The other confequence of inflammation is gangrene, which may terminate in mortification. When the colour of an inflamed part changes to a dark red, when blifters arife on it containing an ichorous fluid, we know that it has become gangrenous. When it becomes black, flaccid, and infen Able, when it lofes heat, and acquires a putrid fmell, it has proceeded to complete mortification. A gan¬ grene feldom affe&s thole who enjoy a good habit of body, tl.dugh, even in them, it may be brought on accidentally by whatever deftroys the texture of a part ; as contufion, long continued prefFure, or whatever deprives a part of its nourifitment. In like manner, cold, by putting a ftop to the circulation, may produce gangrene, and frequently does- fo in cold climates. I'his comes on fuddenly, without any pain or previous inflammation ; and the patient himlelfis fre¬ quently mfenfible of it, till he is informed of his fituation by fome other perfon. A deleft in the circulation, in extreme old age, frequently occafions mortification in the extremities. . "1 htre are fome inftances of what is called dry gangrene^ Dry gan- m which the parts continue totally mortified for a greatgreue. length of time, without either turning very flaccid, or running into diffolution. But fuch cafes never occur from inflammation; they happen commonly from the flow of blood to inch parts being put a ftop to by compreffion of one kind or another, as tumors, ligatures, or other fimilar caufes, obftrufting the principal arteries which ufed to fun- ply them; which, when the ftoppage of the circulation ‘is complete, always occafions a very flow, tedious, mortifica¬ tion ; and as the parts in fuch inftances are no longer fuppli- ed with frefh quantities of fluids, while a confiderable evauo- ration muft ftill be going on, fuch a degree of humidity cannot therefore pofiibly occur as does in other cafes of gangrene. So that fpecies of the diforder has, perhaps, with propriety Enough, been termed the dry gangrene. ‘ There is another variety of the difeafe termed white gan- grene; m which the parts fuppofed mortified do not turnWhlt€ g black, but retain nearly their former colour, &e. Whether^116 fuch a complaint, however, can with propriety be denomina¬ ted gangrene or not, may properly be doubted: but as it is chiefly that fpecies of the diforder which fucceeds inflam¬ mation* gam IV, 5i Prognofis. 10 2 ^ Gangrene, nation tnat id here particularly, treated of, and in which no ^— ' fuch varieties are ever obfevved, it is not neceflary to cairy the inquiry farther. . , , r . The orognofis in every cafe of gangrene is doubtful at fivft, as, even in the flighteft cafes, the patient may fuller from the fpreading of the difeafe; but flight cafes, from ex¬ ternal inniries, are more favourable than thofe which anie from internal caufes, though no perfon can be conflckred fafe till the difeafed parts are feparated, and even entirely caft off. When inflammation happens round a mortified part, more efpecially if pus be formed, we may pretty cer- tatnly pronounce that the mortified part will be thrown od. Means ot When there is reafon to fufpeft from the violence of tne preventing fever and qreat heat oi the inflamed part, that it will teimi- pangrene ra1;e jn pan„rene? blood-letting, and whatever may have a anfr phom . d moderate the inflammation, may check its pro- mflamnia- . . • r..n ...r. r—ant O E R v. Chap, IV, 54 Means of ti 11 wdl be neceffary to deftroy it by fome of the efcharotics, or the knife. This fungus differs, very much from that belonging to healing wounds, being more eminent and lax, and generally in one mafs ; whereas the other is in littlediftina protuberances. It approaches often to- wards a cancerous complexion, and when it rifes upon fome glands fometimes aaually degenerates into a cancer. When t loe excreicences have arifen in venereal ulcers, efcharotics (hould be applied. Ihofe m ufe, are the vitriol, the knar caultic, the lapis infernal,s, and moie generally the red ore- cipitate powder. ' v It IS but feldora that thde inveterate fimtrufes apoear on rTfe T‘h ‘11 r T ,'fuJal f°r thofe of a “Mer Wnd to nfcjS 71 7 r* t0 fuM,de br Pre'r“re ^d the ale of mild rfcharotics : however, if the afpeft of the fore a ,hf a”oth’.as happens in nlcers accompanied with will ask, a“J 0ftSn i" y°ung wornen with obllrudlions, it conftitutiori •r'° pUV“f' “ 'va,le the excrofcences. until the Witho it nVaE?' 7C", m0* ,rba^ thel "i11 bone is can'™! 1 “lc:rs alf°. “'here the fubjacent canons, g,Cat quantities of loofe flabby flelh will 3 E R Y. 103 grow up above the level of the fkin : but as the caries is the Ulcers, caufe of the diforder, it will be in vain to expeft a cure of J the excrefcence until the rotten part of the bone be remo¬ ved ; and every attempt with efcharotics will be only a re¬ petition of pain to the patient, without any advantage. When the pain and inflammation are exceffive, bleeding and other evacuations will often be ferviceable ; and above all things, reft and a horizontal pofition; which laft circum- ftance is of fo great importance to the cure of ulcers of the legs, that unlefs the patient will conform to it ftrictly, the fkill of the furgeon will often avail nothing : for as the indif- pofition of thefe fores is in fome meafure owing to the gra¬ vitation of the humours downwards, it will be much more beneficial to lie along than fit upright, though the leg be laid on a chair ; fince even in this pofture they will de- Icend with more force than if the body was reclined. la ulcers of the legs, accompanied with varices or dila-Ulcers ac- tations of the veins, the method of treatment will depend ‘gmpanied^ upon the other circumftances of the fore ; for the varix can only be affifted by the application of bandage, which muft be continued a confiderable time after the cure. The neateft bandage is the laced ftocking, which is particularly fervice¬ able in this cafe ; though alfo, if the legs be cedematous, or ’ if, alter the healing of the ulcers, they fwell when the pa¬ tient quits his bed, it may be worn with fafety and advan¬ tage. There are inftances of one vein only being varicous; which, when it happens, may be deftroyed by tying it a- bove and below the dilatation, as in an aneurifm ; but this, operation fhould only be praftiied where the varix i^ large and painful. ^ Ulcers of many years Handing are very difficult of cure ; Cure of old and in old people the cure is often dangerous, frequently ulcers dau-- exciting an afthma, a diarrhoea, or a fever, which deftroys*»erokls* the patient, unlefs the fore break out again : fo that it is not altogether advifable to attempt theabfolute cure in fuch cafes; but only the redudh’on of them into better order, and lefs compafs, which, if they be not malignant, is generally done with reft and proper care- The cure of thofe in young people may he undertaken with more fafety ; and in all cafes of ftubborn ulcers, the bark, very copioufly given, will be found of the utmoft fervice. When an ulcer or abfeefs has any finufes or c^anne^sQf {^,uous» openipg and difeharging themfelves into the fore, they areuiccrSs called f/nuous ulcers. Thefe finufes, if they continue to drain a great while, grow hard in the furface of their cavity, and then are termed and the ulcer a JiJlulous ulcer; alfo, if matter be diicharged from any cavity, as thofe of the joints, abdomen, &.c. the opening is called aftnuous ulcer or a fijlu/a. i he treatment of thefe ulcers depends upon a variety of circumftances. If the matter of the finus be thick, ftri6t bandage and comprefs will fometimes bring the oppofite fides of the finus to a reunion : if the finus grow turgid in ^3 any part, and the fkin thinner, fhowing a difpofition to 1 reatment»- break, the matter muft be made to pufh more againft that part, by plugging it up with- a tent '; and then a counter opening muft be made, which proves often fufficient for the whole ablcefs, if it be not afterwards too much tented, which locks up the matter and prevents, the healing ; or too little, which will have the fame effedl ; for dreffing quite fu- perficially does fometimes prove as mifehievous as tents, and for nearly the fame rearifon ; fince fuffering the external wound to contract into a narrow orifice before the internal one be incarned, does almoft as effedtually lock up the mat¬ ter as a tent. i o preferve, then, a medium in thefe cafes,- a hollow tent of lead or filver may be kept in the orifice,, which, at the fame time that it keeps it open, gives vent to the matter. The abiceffes where the counter opening is made Of carious alcers. 65 Treatment. S U R c made mod frequently are tliofe of compound fradfures, and the bread : but the latter do oftener well without dilatation than the former ; though it mud be performed in both, if pra&icable, the whole length of the abfcels, when after home trial the matter does not leffen in quantity, and the (idea of it grow thinner ; and if the finufes be fidulous, no cure need be expe&ed without dilatation. When an ulcer with loofe rotten flelh difcharges more than the iize of it ilrould yield, and the dilcharge is oily and dinking, in all probability the bone is carious ; which may eafily be didinguilhed by running the probe through the flefh : and if fo, it is called a carious ulcer. The cure of thefe ulcers depends principally upon the removal of the rotten part of the bone, without which it cannot heal. Thofe caries which happen from the matter of abfcefies ly¬ ing too long upon the bone, are mod likely to recover : thole of lues venerea very often do well, becaufe that dif- temper fixes ordinarily upon the middle and outfide of the denied bones, which admit of exfoliation ; but thofe produ¬ ced by fcrophula, where the whole extremities of the fpongy parts of the bone are affedted, are exceedin dy dangerous. All enlarged bones are not necefiarily carious ; and there are ulcers fometimes on the fkin which covers them, which do not communicate with the bone, and confequently do well without exfoliation : nay, it fometimes happens, though the cafe be rare, that, in young fubjedls particularly, the bones will be carious to fuch a degree, as to admit a probe ahnoft through the whole fubftance of them; and yet afterwards admit of a cure, without any notable exfoliation. The method of treating an ulcer with caries, is by apply¬ ing a cauftic of the fixe of the fcale of the bone which is to be exfoliated; and after having laid it bare, to wait till the carious part can without violence be feparated, and then heal the wound. In order to quicken the exfoliation, there have been feveral applications devifed ; but that which has been mofl ufed in all ages, is the attual cautery, with which furgeons burn the naked bone every day, or every other day, to dry up, as they fay, the moifture, and by that means procure the reparation : but as this pradlice is never of great fervice, and always cruel and painful, it is now pretty much exploded. Indeed, from confidering the ap¬ pearance of a wound, when a fcale of bone is taken out of it, there is little doubt that burning retards rather than ha- ftens the feparation ; for as every fcale of a carious bone is flung off by new flefh generated between it and the found bone, whatever would prevent the growth of thefe granula¬ tions would alfo in a degree prevent the exfoliation ; which muft certainly be the effeft ot a red-hot iron applied fo clofe to it. Some caries of the bones are fo very (hallow, that they crumble infenfibly away, and the wound fills up ; but when the bone will neither exfoliate nor admit of granulations, it will be proper to ferape it with a rugine, or perforate it in many points with a convenient inllrumervt down to the quick. In fcrophulous cafes, the bones of the carpus and tarfus are often affedled ; and from their fponginefs they are feldom cured : (o that when thefe, or indeed the extremi¬ ties of any of the bones, arc carious through their iubftance, it is advifable to amputate ; though there are inftances in the fcrophula, but more efpecially in critical abfeefles, where, after long drefling down, the fplinters, and fometimes the whole iubftance, of the fmall bones, have worked away, and a healthy habit of body coming on, the ulcer has healed ; but thefe are fo rare, that no great dependence is to be laid on fuch an event. The drefiings of carious bones, if they are (linking, may be doffils dipped in the tindlure of snyrrh j otherwife thofe of dry lint are tafieft, and keep E R ^ • Chap. ]} down the edges of the ulcer better than any other gentle ' win, applications. Swcllin, Sect. If. 0/ White Swellings. There are two fpecies of white fwellings, Mr Benjamin Bell obferves; the one of a mild nature, and frequently admit¬ ting of a cure ; which the other never does. The former, named by our author the rheumatic fpecies ofwhite fwelling, begins with an acute pain, feemingly difiufed over the whole joint, and frequently extending along the tendinous aponeu- ^ roles of the mulcles which communicate with it. There Rkwi is, from the beginning, an uniform {welling of the whole whitefc furrounding integuments. Gieattenfion generally .prevails; %' but at fir ft there is feldom any external change of colour. From the commencement of the difeafe the motion of the joint is attended with exquiiite pain, and the patient keeps it conftantly in a relaxed pofture, rinding that the eafieft. Hence the tendons become extremely (lift' and rigid, till at laft the joints have the appearance of complete and real an- chylofes. The fwelling now begins to augment, till the joint has acquired three or four times its natural fize ; the cuticular veins become turgid and varicofe ; at the fame time that the mufcular fubftance of the limb below decays, though it frequently acquires an equality in fize by beco¬ ming cedematous ; the pain becomes intolerable, efpecially when the perfon is warm in bed or otherwife heated ; ab¬ fcefies iorm in different parts, which, either breaking of themfdves, or by being laid open, difeharge confiderable quantities of matter, but without any remarkable effedl in reducing the fize of the fwelling. The pus difeharged from theie is at firft of a tolerably good confidence, but foon degenerates into a thin ill-conditioned fanieg. How¬ ever, the orifices (rom whence it flows foon heal up, unlefs they are kept open by art ; and new collections breaking out, they burft and heal up as before ; fo that in long-con¬ tinued diforders of this kmd, the furrounding integuments are often entirely covered with cicatrices. In the mean time, the health of the patient gradually de¬ clines, from the violence 0! the pain, and the abforption of matter into the fyftem, which takes place in fome degree from its firft formation in the different abfeefles ; but which never appears fo evidently till the different abfeeffes have been laid open ; after which a quick pulfe, night-fweats, and a weakening diarrhoea, are fare to occur, which generally carry off the patient, it the member is not either amputa¬ ted, or the difeafe cured fome other way. On differing limbs which have been amputated for white : fwellings, the origfnal difeafe appears to have been a mor-0f k*1- bid thickening of the furrounding ligaments, without anytc&J other aifedion of the joint whatever ; the bones and carti-°.n ' lages always remaining perfectly found, as likewife the iynovia both in quantity and confidence. In the'more ad¬ vanced llages of the diforder, the thicknefs of the ligaments is more confiderable, and is generally attenclecjkwith an ef- fuiion, into the furrounding cellular fubftance, q/ a thick glairy matter, which gives to fwellings of th?ijund an elaftic Ipringy feel, independent of the colledions of matter the fluduation of which may alio be perceived. Through this glairy matter the colledions of pus run in various direc¬ tions, without feeming, however, to mix with it. In fome inftances alto a great many fmall hydatides are obferved ; all which form a confuied mafs, incapable of further diffec- tion. All the above-mentioned appearances have been obferved without $ny affedion of the bones or cartilages. But when, by a very long continuance of the diforder the liga¬ ments come to be corroded by the different colledions of 4 matt r / CHap, 8w<-i|'rgs IV. iTmUer, the carttlasref s u G 68 Scrophu- jou- white fw tiling. 69 Appearan¬ ces on dif- fedion. 70 Gaufes of Shis difeafe R and in confeqwcnce th'-rnof the bongs, fpon begin to fiiffer. The teodon? of the flexor " mufclgs, though very ftiff and contrafted, do not, upon dif- fedion, fhow any figns of difeafe, The above is an hiilory of the mildefi; fpecies of white fwelling ; the more inveterate kind our author names the fcrophulous white five!ling. In this the pain is commonly very violent; more acute than in the former ; and, inftead of being diffufed, is confined to a particular fpot, commonly the very middle of the joint. The fwelling is commonly inconfiderable at firll ; infomuch that, on fome occafions, even when the pain has been very violent, little difference in point of fize could be obferved between the difeafed and the found joint. The motion of the joint is attended with very great pain, and the tendons become ftiff. As the dif- order advances, the pain becomes more violent, and the fwelling increafes, with an evident enlargement of the ends of the bones The fame elaftic feel, together with fimilar abfceffes, occur in this as in the laft: but upon opening them they commonly difcharge a thin fetid fluff; the bones are found to be carious, and pieces of them are frequently difcharged at the openings. By the continuance of the diforder, the conftitution fuf- fers, as in the firft fpecie11 of the dffeafe ; and a diarrhcea with night-fweats commencing, the patient is foon reduced to little more than fkin and bone. _ Upon fuch joints being diffedled in the firft ftages of the diforder, the foft parts feem very little affedted: but there is conftantly obferved an enlargement either of the whole ends of the bones, or of their epiphyfes ; frequently of thofe on one fide of the joint only ; in others, again, the bones on both fides have been affe&ed. _ -This enlargement fometimes occurs without any other evident difeafe: but in general, and always in a more ad¬ vanced ftate of the complaint, the fo't fpongy parts of fuch bones appear diffolved into a thin, fluid, fetid matter ; and that too, in fome cafes, without the cartilages which fur- round them feeming much affe&ed. In proceis of time the cartilages are likewife diffolved ; and then the matter of the bones and fofter parts mixing together, fuch iwellings exhibit in that Hate a ftill more confuted colledlion than is generally obferved even In the worft ftages of the other Ipecies of the diforder. _ In the farther progrefs of this difeafe the furrounding j PLaitS 'k5wlfe Puffer : h-aments become thickened, and the contiguous cellular membrane is fluffed witli the vifcid glairy matter obferved in the other fpecies of the duorder. We come now to the confideration of the different caufes , which tend to produce this difeafe. That the ligaments of the joints only are firft affeded in this diforder is rendered evident by diffedion. The thick glairy effufions into the ^oned by an exudation • n thf Veffr 8 l th°fe ll^aments that have been originally inflamed, as fuch parts never furnifii a proper fluid for the hXT0nKr PrrUr Cnt ma'ter: In the courle of thc ^ifeale, indeed abfceffes containing real pus always appear ; buJ round^ lnfl^mR1^on has been communicated to the fur- X"XgfPX3, f C?ldude‘ therefore’ tha^ the firft fpecies of white fwelhng is always occafioned by an infl,m. 12 or rheumatic affeQion of the ligaments of fuch joints as caufe fuch ori- M 3^,Wr/PK“S °f tht diforder to be orignaUy only if he, 0CeE! ‘he '‘'grounding M parts coming tteaion with ‘,"1 St"‘ thcfed,{‘fhi-ri’arft fr,f-eC°nf f'6’ thelie cafcs’ muclt l'“Pe™r to leeches, be. white fu elling generally begin, „ithont .kf y fp i, • f Ca’/k “ 13 more expeditious, and becaufe of the fwellmg oc- Vci. XVIII. Part l S W th0Ut th- P*™1 bE“S by ‘be application of any coofiderable numter of 0 thefe toe White e n y. In the lead able to account for it: and from the effeds which it produces on the bones attacked, appears to be a fpecies of fpina ventofa { a difeafe of the bones probably of the fame nature as fcrophtila is of the foft parts. Indeed, the appearances of the two diforders, after making allow¬ ance for their different fituations, are exceedingly fimilar : they both begin with confiderable enlargements or fwellings of the parts, which generally end in ulcerations ; they both likewiie frequently occur in the fame perfon at the fame time. This fpecies of white fwelling is generally either attend¬ ed with other evident fymptoms of fcrophula ; or the pa¬ tient, in an early period of life, has been fubjeft to that difeale ; or, which is nearly the fame, he is deicended from fcrophulous parents, and probably has the feeds of that difeafe lurking in his conftitution. From all thefe circumftances, it may with probability be concluded, that this fpecies of white fwelling is of a fcrophulous nature: and fince the other fpecies of the diforder is to be coniidered as an inflamma¬ tory affe&ion, a thorough diftin&ion between them is of very great importance ; it will not be improper therefore to give a ftrort enumeration of the feveral diagnoftic or molt chara&eriftic fymptoms of each. The pain in the firft fpecies is always, from the begin- ning, diffufed over the whole joint, and fometimes extends a confiderable way along the mufcles that are attached to it: in the other fpecics it is always at firft, and fometimes even when the complaint has been of confiderable {landing, confined to a very fmall circumfcribed fpace. In the for¬ mer, the fwelling is always confined to the foft parts, and is from the beginning exceedingly evident : but in the latter, it is generally for fome time hardly perceptible ; and when it appears the bones are the parts chiefly affefted, the fur¬ rounding teguments coming only to fuffer on a farther progrefs of the difeafe. Thefe are the chief local differences of the two fpecies of this disorder; but fome afliftance in the diftinftion may likewife be obtained from the general h ibit of the patient, and from the manner in which the complaint may feem to have been produced. Thus, when fuch fwellings occur in young, ftrong, plethoric, people, efpecially in inch as have formerly been fubjeft to rheu- matifm, they moll probably will always prove of the mildeft or rheumatic fpecies of the diforder: But when they appear in patients of fcrophulous difpofitions, we need be under very little doubt in concluding them to be of a fcrophulous nature. 1 he great utility of prope-ly diftinguilhing the two dif¬ ferent fpecies of white fwtllings appears in no circumftaa.ee jo evident as in the treatment. In the pne, there being iome chance, by proper remedies, of being ferviceable to the patient ; whereas in the other, viz. the fcrophuloits, .t is not probable that art will ever be able to afford much alintance. In the rheumatic white fwelling, as it is always at firft Treatment evidently of an inflammatory nature, confiderable advantages>0 he are commonly obtained by a due attention to a proper cooL?1st'f white ini; courfe. The firft remedy which, with this view, Ihould be put in practice, is blood letting immediately from the part afteCled. Cupping and fcarifying is here a principal remedy i he inftrument Ihould be applied to each fide of the difea- led joint ; on each fide of the rotula, for inllance, when the T' 13 th5 Part af'eae<1' 31 right o. ten ounces Of blood difcharged ; and this to be repeated at proper in- tervals, once, twice, or oftener, according to the violence of the fymptoms and ftate of the patient’s ftrength at the io6 S U R C White thcfe animals proves frequently very troublefome, and fome- Swellings. timeg interrupts for a time the ufe of other remedies. 1 -jjpon the anterior part of the joint, where the cupping- claffes have not been placed, a fmallblilter fhould be direft- ly applied, and the part kept open with iffue-ointment, till the wounds from the fcarificator are fo far healed that a veficatory may likewife be laid on one fide of the joint ; and fo foon as that is nearly healed, the other fide fhould be alfo bliftered. By thus alternately applying them, firft to the one fide and then to the other, almoft a conftant ftimulus is kept up ; wh;ch, in deep feated inflammations, feems to . have fully a greater influence than all the difcharge occafion- ed by blifters. Gentle cooling laxatives at proper intervals are alfo of ufe ; and the patient fhould, in every refpea, be kept upon a ftrid antiphlogiftic c.ourfe, both as to diet and every other circumftance. It is in the firft ftages only of the difeafe that fuch a courfe can be of much fervice ; and in fuch it has f requently been a means of curing diforders which otherwife might have proceeded to the laft ftages of white fwellings. The original inflammatory affe&ion being once over, thefe fort of drains feem to have little or no influence, and ought not then to be long perflfted in, as they prevent the ufe of other remedies, which, in an advanced flate of the difeafe, are commonly more efficacious. The inflammation being moftly gone, and while there are yet no appearances of the formation of matter, mercury lias fometimes been known of ufe ; not given fo as to fah- vate, but merely to affeft the mouth gently, and to keep it fomewhat fore for a few weeks. The heft form of ufmg it is by_ way of unftion, as it allows, at the fame time, the application of friftion ; which, in all fuch fwellings, may of itfelf be in fome meafure con- fidered as a remedy. For this purpofe, an ointment of quickfilver and hog’s lard fhould be prepared ; but with fo ffnall a proportion of the former, that the patient may admit of two drams of the ointment being tubbed in three times a-day. In order to rub that quantity of the medicine in with gentle friftion, an hour each time is at leaft neceffary ; for in the ordinary way of continuing fridfion for a few mi¬ nutes only, it can feldom have much influence. By Le Dran, and other French wi iters, falls of warm water on fwellings of this nature are much recommended; and there is no doubt, that a long continued and reiterated application of that remedy may, in the firft ftages of inch com¬ plaints, be often attended with very good effefts. By a proper ufe of thefe different applications, viz. of the feveral topical remedies in the firft or inflammatory ftate of the difeaie, and afterwards (ftill, however, beiore the formation oi mat- ' ter) of mercurials, frkftion, &c. many affe&ions of this na¬ ture have been entirely removed. It frequently happens, by the bent pofition the limb has been for a long time kept in. that the ule of the joint comes to be entirely loft, having often acquired fuch a degree of ftiffnefs, that any attempts to move it are commonly attend¬ ed with very great pain. 'Ibis has been conllantly attribu¬ ted to one or other of two different caules, which aie both in their nature incurable, viz. either to the ends of fuch bones as compofe the joints having run into one another, fo as to become firmly conjoined in confequence of the (ur- rounding cartilages being abraded ; or to the infpiffation, as it is termed, of the fynovia of the joints, whereby their cavities aie entirely filled up, and no fpaccleft for the tutuie motion of the bones. Both thefe opinions, however, are in general very ill founded : as the ftiffnefs almoft always proceeds from a con- traftion of the mufcles and tendons. It may often be cured by a long continued ufe of emollients. E R Y. Chap. IV, The heft emollient that can be ufed is pure olive oil White applied warm ; -as much of it as can be eafily rubbed in by 3Wellin6^ an hour’s gentle friaion ffiould be regularly done at leaft ^ three times a-day ; and inftead of confining the friaion al- toTether to the rigid tendons, it fhould be extended over the whole mufcles, even to the infertions of their other ex¬ tremities ; but more efpecially on their flefhy mufcular parts, where the principal caufe of the continuance of fuch com¬ plaints is probably leated. " The web or omentum of a new-killed fheep, 'or ot any other animal, applied over all the difeafed parts direftly on being cut out of the animal, is fometimes attended with ad¬ vantage. The application fhould be renewed as frequently as poffible, once a day at leaft, or oftener when it can be done ; for on being more than four or five hours applied it becomes difagreeable ; and after that time, indeed, as it com¬ monly turns ftiff, it cannot then probably be of much fer- vice. r > The diforder has hitherto been fuppofed not to be io Bell's Sir. far advanced as to have occafioned the formation of matter ;ir-r> for when come that length, no confiderable advantages can be expe&ed from any of the remedies as yet recommended : but even in that ftate of the complaint, it the patient s health ^ does not abfolutely require it, amputation of the member when an fhould not be immediately had recourfe to. For by opening pntation the different abfeeffes foon after their formation, the mat- ter may be prevented from deftroying the captular ligaments of the joints, which, if once effefted, would no doubt lender that operation neceffary. Even in point of fuccefs from the operation, it ought never to be advifed till the complaint is pretty far advanced For in this diforder, efpecially, a greater proportion of patients have recovered after amputation, who have previoufly been confiderably reduced by diarrhoeas and other weakening fymptoms, than of fuch as have ftill re¬ mained in a full plethoric habit of body.” All the different obfervations hitherto made upon the treatment, relate particularly to the rheumatic fpecies of the diforder ; and when had recourfe to in time, and duly per- fifted in, they will frequently be found of fervice : but when the difeafe is fo far advanced as to have deftroyed the capfu- lar ligaments of the joint, and perhaps even tne cartilages and bones themfelves, amputation of the member is then no doubt the only refource. _ In the fcrophulous white fwellings, when jthe oueaiei* parts of the bone begin to call off, a cure may in that way, by affifting the efforts of nature, be fometimes obtained in the imall joints; but in all the large joints, as the knee, ankle, &c. it is not probable that any other vefource than amputation will ever afford much relief. And even the tf- fedts of that operation can feldom be depended on as lair¬ ing j for when the general fcrophulous taint ttill fubiifis in the conffitution, the diforder will moft probably appea?r again in fome other pail; which, however, in the advanced ftages of the difeafe, it is fometimes neceffary to run the rifle of, the pain, being often fo tormenting as to make it more eligible to fubmit to any hazard rather than to bear it longer. When, however, for fome reafon or other, amputation is determined againft, as there being almoft a certainty of the complaint foon returning, from the fcrophulous difpofitkm appearing very ftrong in the fyftem, it then becomes necef¬ fary to have recourfe to palliatives, fo as to render the com¬ plaint as tolerable as poffible : and with this view, opiates in large dofes, by moderating the pain and procuring reft to the patient, will in general be found the principal remedy. In other refpe&s, all fuch medicines and articles of regi* men as are found beneficial in fcrophula, may be had re« C0Urfc t9- gfCT. €hap. Cancer* IV. S U R O ^ 73 ^kppdrsfi1 ces of an nicerated cancer. 74 Caufes of cancer. ^ 75 Cure. Sect. ill. Of Cancers. Cancers mofl commonly arife in the glandular parts of the body, where they are occafioned by any bruife or con- tufion, fometimes a very {light one: and hence they are more common in the lips, and in the breafts of women, than in any other parts of the body. Cancers have been gene¬ rally dhlingudhed into occult and open. By the former are meant fuch hard fcirrhous fwellings as are attended with frequent /hooting pains, and which at laft generally termi¬ nate in the latter. By the open cancerous ulcer, is underflood that fpecies of fore which commonly fiicceeds to hard fwellings of the glands; although in fome inftances it occurs without any previous hardnefs. The edges of the ulcer are hard, rag¬ ged, and unequal, very painful, and reverfe in different ways, being fometimes turned upwards and backwards, and on other occafions inwards. The whole furface of the fore is commonly very unequal, there being in fome parts con- fiderable rifings, and in others deep excavations. The dif- charge, for the mod part, is a thin dark-coloured fetid ichor j and is often pofTeffed of fuch a degree of acrimony as to ex¬ coriate, and even deilroy, the neighbouring parts. In the more advanced ftages ©f the difeale, by the erofion of blood- veflels which occurs, conflderable quantities of pure blood are fometimes alfo difcharged. Patients labouring under real cancerous affeftions uni- verfally complain of a burning heat over the whole ulcerated furface; which, in general, is the mod tormenting fymptom that attends the diforder ; and thofe {hooting lancinating pains, which were troublefome in the more occult date of the complaint, become now a great deal more fo. fheCe are the mod frequent fymptoms which attend an ulcerated cancer; but the appearances of fuch fores are fo various, that it is almod impoifible in any defcription to comprehend every one. When two, three, or more, how¬ ever, of thofe enumerated, concur together in the fame ulcer, we may always be pretty certain of its being of the cancerous kind. Concerning the caufes of cancers, there have been a great many conjeftures, but without any folid foundation. It is of fome moment, however, to deterpine whether they arife from fome general diforder in the fydem, or whether they are. only to be accounted local difeafes. Many of the mod eminent practitioners have been of opinion that they arife from a general diforder of the fydem ; and hence cqnfider them as totally incurable even, by extirpation, as the latent feeds of the difeafe, in their opinion, will not fail to bring on a return of it fomewhere or other. Of this opinion the late Dr Monro appears to have been; and in a paper on this fubjea in the Edinburgh Medical EfTays, declares, that . ot near 60 cancers which he had been prefent at the ex¬ tirpation of, only four patients remained free of the difeafe at the end of two years.” From this bad fuccefs, and the viu ent progrefs of the difeafe, he finally concludes againd the extirpation of cancers, and propofes only the palliative met io o cure. Lut later praClitioners have been a great deal more fiiccefsfuland a late publication by Mr Hill, lurgeon at Dumfries, has put the ufefulnefs of extirpation beyond a coubt, when .the operation is performed in time: °ug a.ter lue difeaie has continued long, and the virus een a or ed, the whole fydem acquires a cancerous difpo- 'T 1 tc difeafe almo.d. certainly' recurs in forne other -j • ' • I?ra lnteiriai medicines we can expedt little or no- do nn"!, ^ Ui''rure cancers ; and external applications can from tp‘°le 1 J,au Pa^ate< Great expectations were formed verfallv ^ an^ extra& cicuta; but it has fo uni- > “ ledJ that few put much confidence in it at pre- E R Y. ro7 fent. However, it has fometimes been of fervice in cafes of Cancers, a fimple indurated gland ; and even where the difeafe has "r~» ^ been farther advanced, it has produced a better difeharge, and diminifhed the fetor of the fore ; but as it cannot be depended upon for a radical cure, a delay of the operation is never to be recommended. No part of the body is more fybjedl to cancer than theCancer of breafts of women. Cancer of the mamma may arife at any1*16 mam- period of life, though it feldom appears till about the time ma* the menfes ufually difappear. Tumors arifing in the breaft; previous to this period have been confidered by fome prac¬ titioners as being only of a fcrophulous nature ; and it is probably owing to that circumftance that feveral cures have been of lats years made on tumors of the breaft: by mercu¬ rial fri&ions and other remedies. >jy Scirrhus and cancer of the; breafts are diftinguifhed byrts fymp* the following marks: When the tumor is firft obferved, ittom3* is commonly in form of a fmall hard knot in the glandular part of the mamma, while the fkin at the fame time is free from inflammation. It frequently continues in this flate for feveral months : by degrees, however, it increafes con- fideiably in fize, and at laft a fharp pain is felt {hooting to¬ wards the axilla. The lymphatic glands at the under edge ol the pedloral mufcle and in the axilla are often enlarged, and an occult cancer is now formed. By degrees the inte* guments over this part of the tumor in the mamma become difcoloured, and at laft an ulceration or open cancer breaks out. Violent hemorrhagies now frequently enfue ; the pain becomes ftill more excruciating ; and, unlefs proper aftiftance be given, the patient is generally cut off in not many months after the breaking out of the cancer. In early' ftages, the difeafe in general may be confidered as entirely a local affedlion, and a radical cure may be of courfe expe&ed; but in proportion as the fkin fhall after¬ wards be found diieafed and adhering to the gland, and that to the pedforal mufcle, and the lymphatic glands near the mamma and in the arm-pit fwelled, the chance of a cure be¬ comes more doubtful, as the cancerous matter may have been abforbed, and part of it carried into the fyrftein. The molt unfavourable ftate for an operation is when there are ulce¬ rations in the breaft, large, deep, and of long {landing ; and particularly if thefe are attended with great pain, when the arm of the aftedled fide has become oedematous, and the health of the patient is much impaired. In this laft ftate veryr little is to be expelled from a furgical operation. In extirpating the mamma, which we fhall firft fuppofeMethod of is to be done where the flein is found, and where the tumorext'rPatingi lias no uncommon adhefion to the pectoral mufcle, the pa-1^16 mam“ tient ought to be placed horizontally in a bed, or upon a table covered with a mattrefs, &c. The operator is to be feated, and to have proper affiftants. A longitudinal incifion is then to be made with a common fcalpel through the {kin and cellular fubftance along the whole extent of the tumor, and at a little diitance from the nipple, which is to be laved. When the longeft diameter of the tumor is acrofs the body, i a Head of a longitudinal incifion, a tranfverie one is to be made. 1 he integuments being diffcbted from the mamma on both Tides of the inciiion, the patient’s arm is to be ex¬ tended to fave the pt&oral mufcle ; and the whole glandu¬ lar part is to be detached from the mufcle, though a {mail portion only fhould be difeaitd, beginning at the upper fide, and feparating downwards. If there be any indurated glands, they are to be carefully removed. If the patient he faint, a glafs of wine, or Tome other- cordial, is to be given. After the difeafed parts are removed, the wound is to be cleaned with a Iponge wrung out of warm water, which will generally render the fmall bleeding veffels more conipicuaus. Th e integuments are next to be clofely ap- 0 2 plied S U R plied to the parts underneath, and retained there by the twifted future, and likewife by a few adhefive itraps. A laive pled'Tit of fimple ointment is now to be laid over the ■whole; and this is to be covered with a thick compels of lint, tow, or iott linen ; and the dreflings to be kept in their place, and moderate predure made by the napkin and jcapulary bandage. By this method the integuments will generally loon ad¬ here, and a cure will be performed by the hill intention. But it does not often happen that the operation is perform¬ ed while this favourable mode of pradliixng it will anfwer. In gener?.l, before extirpation of a bread is recommended by the iurgeon, or fubmitted to by the patient, a coniidtr- able portion oi the external integuments are fo much ditea- fed as to render it neceffary to feparate them along with the glandular part of the mamma. It feme times happens like- •wife that the tumor adheres to the pectoral mutcle, and that again to the ribs. In either of theie cafes it becomes peceffaVy to remove all the dileafed parts. For this purpoie, two incilions of an oval form, with fharp extremities, of a fufficient fize to include the whole of the affected parts, be¬ come neceffary. It again it be found, that betides the du- eafe of the bread, the lymphatic glands in the neighbour¬ hood are indurated, or otherwife dileafed, the fhii incifion ought to extend at once over thefe ; and after the other parts have been removed, and the veffels iecured, the whole of the dileafed glands are to be extirpated ; and in pei form- in" this part ot the operation, conliderable alfitiance may be given by fupporting them with a hook, or a ligatuie palled through them, till they are entirely removed. When they lie deep in the axilla, the points of the fingers, or the end of the handle, will fometimes be lafer than the edge of the knife. After having removed all the glands which ate in the fmalleft degree affe&ed, the cut edges of the fkin are to be brought as near to each other as the nature of the cafe will allow, fo as to heal as much as poffible by the firit intention. After the wound is nearly, or perhaps entirely healed, an iffue, inlevted into the arm of the oppofite tide, will be the belt means-of preventing a relapfe- Chapi IV, Bums. Sect. IV Burn:. 19 Cbnfequen So Cure. 1U01UC4UC11- The immediate confequence of burns is a greater or lefs tcaofBurn?.0f inflammation; and the danger attending fuch ac¬ cidents is in proportion to the extent of the injury. Burns which irritate the fkin only, without delfroying the cuticle, aft nearly in the way of a common hliftering plafler. When the cuticle is deliroyed, no bliller takes place ; a mortified Hough is obferved ; and when this leparates, an ulcer is left. Where the cuticle is not deftroyed, relief may be pro¬ cured by holding the part affe&ed a coniiderable time in very cold water, or fometimes by plunging it two or three times into water a little below the boiling point. Solu¬ tions of faccharum faturni, and other preparations of lead, have been recommended, as in the cafe ot other inflamma¬ tions. Vinegar is found a very effe&ual application, whe¬ ther the fkin be found or buffered. i he part may be en¬ tirely immerfed in. it, or linen rags dipt in the vinegar may be applied, and the parts kept conffantly moift, till the pain be removed. The fame application is uieful, where the fkin is rubbed off, or otherwiie deftroyed. In this cafe, indeed, the vinegar is apt to give additional pain on its nr ft application ; but this foon ceafes, and the part becomes much cooler and eafier. If the patient will not luffer the vinegar to be applied immediately to the furface of the foie, a linen rag foaked in olive-oil may be previoufly laid on the part, covering the whole with the cloths dipped in vinegar ; and thefe applications are to be occaiiunally repeated, till g E R Y- r , the pain and inflammation be entirely removed 5 after which the parts are to be dreffed in the fame manner as in the cate v-w of a common blilter. In extenfive burns, where the irrita¬ tion is great, along with external applications, opium fhould be preferibed, in dofes adequate to the degree of pain. Even that ftupor with which patients in this fituatioii are fometimes attacked, is found to be more readily removed by opium than by any other remedy. With refpeft to the bhftcrs which arife upon burns, it has been difputed whether they ought to be opened, or allowed to remain till they dry np of °themfelves. But, according to the opinions or the lateit authors, they ought to be opened as foon as any con tide ra- ble quantity of fluid is found in them. Alter the ferum is dilcharged, a thin liniment of wax and oil, with a little lac charum faturni, fhotild be applied to the part. In cafes of very fevere burns, where, notwithftandmg the above treatment, there is danger of a violent inflammation being induced, blood-letting, cooling purgatives, and other remedies adapted to the peculiar fymptoms, muff be uiecr. When, again, bums are from the firft attended with hffs of fubftance, as commonly happens after the application o o metallic bodies, we ought to have recourie to the vinegar, as already mentioned, or to a liniment which ts now in very common ufe for fuch purpofes, made of equal parts o. hnt- feed oil and lime-water, which, when fhaken together, forms a thick white fubftance, which often gives fpeedy re¬ lief ; and it may be readily applied by daubing the parts ^ " frequently over with a loft pencil well ioaked in it. Though this has been conlidered as one of the beft applica¬ tions in burns, yet, in fome cafes, more immediate relief has been procured from the application of Goulard’s cerate, or the unguentirm nucritum ; and a weak folution of faccharum faturni has fometimes been of fervice. gj When burns are occalioned by the explofton of gm*-Burns oca- powder, fome of the grains of the powder are apt to befionedby forced into the fkin. At firft they produce much irnta- tion ; and if they are not removed, they commonly leave marks which remain during life. They fhould, therefore,, be picked out as foon as poffible after the accident; and to prevent inflammation, as well as to diffolve any power which may remain, the parts afflifted fhould be covered, tor a day or two, with emollient poultices. In other refpects, injuries of this fort are to be treated like any other kind of burns.—When burnt parts are contiguous to each other, they are apt to adhere. To prevent this, pledgits covered with any proper dreffing ought-to be inferted between them during the courle of the cure. Ulcers ariflng from burns are apt to become foft and fungous, and to rile above their natural level. When this is obferved, the emo - lient ointments, which may have been previoufly ufed, fhould be laid atide, and thofe of a moderately allringent nature applied. Gentle compreffion with a roller is alio of parti¬ cular fervice. Advantage is likewife derived from latur- nine wafhes, &c. One of the beft ointments, m luch cafes, is the common calamine cerate. 1 hele will com¬ monly anfwer the purpofe ; but when they prove infuffB cient, burnt alum, blue vitriol, or even lunar cauftic, may be neceffary. Chap. V. Of Inflammatory Tumors. Inflammatory Tumors are fuch as are quick in their progrefs when compared with thofe of the indolent kind, and are attended with confidei able pain and other fymptoms of inflammation. We have here mentioned fuch only wliofe treatment more properly belongs to the province of the fur- geon,. and which are placed according to their fituations m the different parts oi the body. DECT. Chap V. Jnftamma tory Tumors. SURGERY. log _ , - , n ;■ ur gins about the top of the os facrum, and is feated in the Inflamma- Sict. I. hJUmuum W Af“fi °f li* Bnafi of Mm*. * cinity of the pfoas mufc!e. to,. This difoider occurs moft frequently in nurfes by the The fymptoras begin with pain anil tenfron about the Tum°" jjoppage of the milk, which is always occafioned by hidden, loins, (hooting upwards to the fpine and downwards to the gf o’- imorudent exnofure to cold. thigh. The diieafe has 1’ometimes a llrong reiemblance to -Sympto or imprudent expofure to cold In the early itages of the affe6lion, refolution is always to be attempted, unlefs the (welling appears to have an evident tendency towards fuppuration. The remedies ufed in inflammation, iu general, ieem uieful in every cafe cf in- flammation of the breafts. When the patient happens to be nurhng, a hidden evacuation ot blood is apt to diminilh the quantity of milk: In luch cafes, therefore, blood is to other cale, the matter be extra&ed in fmall quantities at a time. The application o-rnm anrl lomf-nmes of cooling faturnine poultices is advifable. When fuppura¬ tion kas taken place, the matter is to be diicharged by making an incifion in the moll depending part of the tumor. Sect. II. Inflammation of the Tejliclts. This difeafe is often owing to expofure to cold, violent exercife, &c. ; but molt trequently to gonorrhoea virulenta, and never to matter falling down upon the teftes, as was fuppofed by thofe who gave it the name of hernia humora/is. Inflammation here rarely terminates in fuppuration. The belt method tor difcuffing the inflammation is by tbe application of leeches; after which the penis ought to be kept conftantly moiftened with a folution of faecharum fa- turni, and the fcrotum and teftes fupported by a proper bandage. The bowels fbould be kept moderately open ; the patient fhould ufe a low diet, and keep as much as poffible in an horizontal pofture. If lues venerea be prefent, a cure cannot be expected without mercury. If the dfteafe is owing to a ludden ftoppage of the difcharge in gonorrhoea, the running ought to be reftored, and promoted by bathing the penis in warm water, injedfing warm oil, an 1 the uie of bougies. Thefe means will generally difcufs the ififlamma- tion. If matter iorm, it muit be difcharged. Sect. III. Of Venereal Buboes.. A swelling of any of the lymphatic glands of the body is called a bubo ; and when fuch a iwelling proceeds rrom venereal poilbn, it is termed venereal bubo. They feidom or never appear except in the lymphatic glands ot the groin, arm-pit, or extremities, and much more frequently in the groin than anywhere die. In the treatment of buboes, a ftriA antiphlogiftic regimen is to be ufed to promote a reft lution ; the application of leeches to the hardened gland is particularly proper, in dticuft fing venereal buboes, the application of mercurial ointment has a coniiderable effedl. Alter fuppuration is completely formed, the application of cauftic to open the bubo is dange- ious, left it fhould corrode iome ot the coniiderable blood- vcdels, which generally lie contiguous to the bubo. Buboes, when opened by the knife, are. laid to heal with more diffi¬ culty, and generally to leave a fear behind them. To al¬ low them to burft of themfelves, is therefore for the molt part proper, except when the colledion is fo conflderable' as to preis upon the neighbouring blood- veflels. In luch a cafe,a imall incifton maybe made bytlft lancet,taking as much care as polfible to prevent the admiffion ot the external air into the wound. _ When the edges of the opening grow cal- ous, the application of lunar cauftic to them becomes necef- wiJk ■UunnS lhe remainingpart of the cure, mercury ioined with opium is to be ufed. 3 J faEcx, IV. Lumbar Abfcefs. in The'S/^fttS' b,e aP?1*? ,0 everJr nbfeefs fated > out that which is here meant is fuch as be- thigh. The diieafe has fometimes a itrong reiemblance to -Symptoms nephritic affections, and is fometimes miltakeil for lumbago. °f lumbar After luppuratiou takes place, fthvering fits come on ; and3'J^cc^* the pain now becoming dull, the patient imagines himielf better, till matter points at the lide of the anus, or in the groin. The hril cafe is rare ; and when it does occur, the tumor burits, or is opened as a common abfcefs. In the is feated behind the iafeia of the groin, and lomttimes defeends as tar as the knee. The teguments commonly retain their natural appearance. Fluc¬ tuation is evident, eipecially when the patient is in an up¬ right pofture. It is often miftaken for crural hernia ; but may be eahly diltinguilhed from it, by its flow’ progreis, by pain in the lumbar region at the commencement of the dif- ceafe, by the patient allowing tiie tumor to be handled freely, by fluctuation being evident, by the tumor beco¬ ming flaccid when the patient is in an horizontal lituation, and by the abience of all the (ymptoms by which hernia is diitinguilhed. Both difeafes may occur at once ; but this is very rare, and a diftin&ion is ftill to be made. s It is difeovered that this diieafe has, in general, been in- Ci'ift ofcbi$ ■ duced by coniiderable injury being done to the imall of the difeafe, back or loins, either by twills, or fevere bruifes, or by Bid¬ den expofure to cold alter the heat occafioned by fevere exerciie, particularly in fcrophulous habits. Were accidents of this nature immediately treated with that attention which their importance deferves, the difeafe might frequently be prevented. In the treatment the ftridleft antiphlogiftic regimen Treatm«n« ought to be oblerved. Blood-letting ought immediately to be performed, by fcarifying deeply and leeching the injured part: neither are bliiters, opiates, gentle purgatives, and other remedies uferul in inflammations, to be.neglected. Authors have an idea that little advantage can be derived from laying, open the abfcefs, on account oi the great.danger which may enme from the admifiion of air. Mr Benjamin Bell, however, is of an oppoiite opinion, and has always gi¬ ven-vent to matter here as eifewhere, and no bad confequences have been obferved. The matter, when long lodged, has been found to deitroy the (oft parts and bones,. and. fome¬ times to make its w’ay into the cavity of the abdoiten ; all of which might be prevented by an early evacuation. For this purpofe atrocarihould .be ufed,. which was tried by Mr Bell m one cale with complete iuccefs. Some other caies are lately narrated by authors, where, by the introduction of a feton, and drawing off the matter by flow degrees, and then by uling pomp refs, and fometimes injections of gently irritating fluids, a cure has been per¬ formed m the courfe ot a.few months. If the cafe is doubt¬ ful, an opening Ihould be.made with the knife in the fame - manner as in hernia, lithe flow of matter continue con¬ iiderable tor the ipace of two or three weeks, injections of a weak folution of iaccharum faturni, lime water, or other gentle aftringeats, may be employed. Sect. V. Paronychia or Whltloc, and Chilblains. Whitloe is a painful and inflammatory fweliing at the Of whuloci extremities ot the ringers under the nails, terminating in an effulion ot clear ierum below the, (kin, which is iometimes 1° acrid as to corrode the periolleum, and render, the bones carious. At other times the iflammation runs fo high that the whole of the arm fwells, particularly the lymphatics, and lo me times even the glands in the axilla. Vv hen this afteClion arilea from external violence, the re- intdies J f o liiflamma- tory Tumor!i. S U R G medies employed for mSammatlon, in general, will be of fer- .• \TTUpn j,r;reR from unknown caufes, ardent Ipirits 86 Chilblains, 87 Symptoms of contu- fions and fpraifis. 88 Treatment vice When it arifes from unknown caufes, ardent fpints and'aftringents have been found ufeful, particularly when topical and general bleedings have been previoully uied. When an effufion of a ferous matter takes place, it is im¬ mediately to be difcharged, as it is almofl impoffible to con¬ vert it into proper pus. When this ferum has continued fo long as to render the bone carious, a removal of the whole bone, or of the carious portion, becomes neceffary, m order to effeft a complete cure. Chilblains are inflammatory fwcllings, or a purple colour, chiefly affeaing the heels, and fometimes alio the fingers, toes, arms, hands, or feet, or even the tips of the note and ears, attended with a flinging pain, and a degree of itching. The fwelling fometimes cracks, and difcharges an acrid le- rum: fometimes a mortification takes place, and an ulcer follows very difficult to heal. f . r ,, This diforder is owing to the weaker adtion of the imaii veffels moft remote from the heart, occafioned by cold or dampnefs, and occurs moil frequently in people of a delicate conftitution. . r j * When the patient has been for fome time expoled to the cold, and the parts are froft bitten, they ought to be plunged into the coldeft water and rubbed with fait; when they are only benumbed, rubbing them with camphorated fpint ot wine will anfwer equally well: but when cracks take place, and an oozing of acrid matter enfues, poultices may be ap¬ plied, but not long, as they are apt to give rife to fungous excrefcences. Sect. VI. Of Contufions and Sprains. Contusions of the integuments and mufcles produce pain, fwelling, and inflammation, and thele, in fome cafes, may extend to a confiderable degree ; but in general they are lefs violent than what take place in cafes of fprains of ligaments or tendons; for in thefe there is frequently a to¬ tal lofs of motion for many weeks, and fometimes for jears, if proper attention be not paid. An effufion of fluids al¬ ways fucceeds the injury, which feems to be, for the moll part, of a ferous nature, as the fkin ufually retains its na¬ tural colour ; fometimes the tumefied parts are of a deep red, or leaden colour, owing to a rupture of fome veflels conveying red blood. In the treatment of contufions and fprains, two circum- ftances n^iuire attention. 1. i o endeavour to pi event the fwelling as far as is practicable ; 2. To employ thofe remedies afterwards which are known to be molt powerful in pie¬ venting or removing inflammation. In contufions of the cellular fubflance, and even of the mufcles, the effufed fluids are commonly foon abforbed ; but in fprains .of the tendons or ligaments, a very troublefome, painful thicknefs of the injured parts is apt to continue for a great length of time, and in fome inftances even for life. It is neceffary, therefore, to obviate thefe fymptoms as foon as poffible ; and for this purpofe, cold aflringent appli¬ cations, as water, vinegar, 6tc, are moft commonly uted. Others again, with a view to relax the parts fully, make ufe of water as hot as the patient can bear it. By immerfing the injured part in thefe immediately atter the injury is re¬ ceived, the effufion wall at leail be fomewhat obviated. When the pain is exceffive, opiates become necefiai y.. After blood has been freely difcharged, a repetition of the remedies already mentioned wrll be found to give great relief; care fhould be taken, at the fame time, that the in- . jiired parts be kept in a relaxed and ealy poiture. Chap. VI E R Y, Chap. VI, continue for a long time without being attended with either indolent pain or inflammation ; though occaficnally almoll all of them maybe inflamed, and fome of them, in that flate, ^ attended with confiderable pain. They are of differentDifferent bind<5 according to the nature of their contents, andkindsofin. appear in various parts of the body. They are foted^tw. in the adipofe and cellular membrane ; whence it oken hap¬ pens that they take place in the vifeera themfelves, where they are frequently mortal. Sometimes they are filled with a fubfiance of the confidence of honey, and are -thence called meliceratous tumors ; fometimes they are filled with an harder fubdance, and are then called atheromatous tumors ; at other times they are filled with a fubftance of the confidence of fat, and are then calledJlcatomatous. Sometimes, however, they are found to be repleniffied with a fluid lymph coagu- lableby heat, and are then called hydatids. One fet are filled with matter like the fynovia of the joints, and get the name of zanxlions. . „. . „ , - ,, HnJL Tumors of this kind are eafily didinguifhed from all^.J others, as having neither heat, pain, nor pulfation, as is to^jy be obferved in thofe which incline to fuppurate ; and they trum otk are'didinguifhed from each other, before they are laid open.u™'^ 1 n r\ 1 • I.‘1in tKp mplirpris? tm by fluctuation being readily perceived in the melicensthe^® atheroma is foft and compreffible, but has no fluctuation ; while the deatoma is commonly firm and rolls under the fkin. But thefe rules are liable to confiderable exceptions. The mehcens and atheroma are mod commonly found upon the head, and the deatoma upon the other parts of the body ; while ganglions are fituated over the tendons of the 9> mufcles. Thefe tumors mud be either extirpated entirely,lre,!iw' or laid open fo as to difpofe the cyd to dough off or granu¬ late. If the matter be fluid, we may evacuate it by an opening made with a lancet, or by means of a feton ; but as the matter is apt to colleft again, it is better to remove the fac entirely. If large veflels or nerves prevent this from being done, then it is to be laid freely open and ex- pofed to the air, fo that the bag may granulate, or be thrown off. When the tumor is to be extirpated, a longi¬ tudinal jncifion is to be made through the integuments ; after which the tumor may be frequently removed by the point of the finger, or by the end of a fpatula, replacing the integuments with a view to heal by the firfl intention. In eveiy pendulous tumor of this kind, with a narrow neck, we ought to divide the teguments near the bottom of the tumor, in an oval form, fo that the wound may be afterwards properly covered with the remaining integuments. After the tumor is removed, the fkin is to be replaced over the wound, and fixed with adhtfive flraps, covering it with a pledgit of cerate, a fmall comprefs of linen, with a bandage above all, to make a gentle preffure on the parts. Bect. I. OfSteatomatous and Sarcomatous Tumors. Of .Indolent lumors. Th.f.se are fuch as are flow in their progrefs, and may Steatomatous tumors have been ranked by authorsSteato®*’ among thofe of the encyfled kind but they have no other tomt“ cyfl containing them than the common cellular fubflance, fomewhat condeqfed ; and the particles of fat compofing them are found of the fame lize with thofe in a found part of the body. Authors formerly afl,vifed the difeuffion of fleatoms, or the prevention ot their growth, by the application of pref¬ fure ; but by Inch means the growth is rather promoted than retarded, nor have internal remedies been of any ad¬ vantage- They can be removed therefore by an operation which is the fame with that for the extiipation of encyfled tumors. 7. Sarcomatous tumors have nearly the fame external ap-garcoi113' pearance with thofe of the lleatomatous kind. The termt u^tu has been applied, in a general way, to feirrhi of the giandsj010 but 9i Chap. vr. U R :ofai. 94 Ganglions, but farcomatous tumors are likevvife found in various other . parts of the body, and are diftinguifhed from fteatoma by 1 Burfx firmer t0 the touch ; internally they are found of a redder colour, or approaching that of mufcles, in confequence 1 of the greater number of veffels entering into their fubltance. Thefe are to be treated in the fame manner as fteatoms ; but the operation ought to be performed early, as they are more apt to degenerate into cancer. Sect. II. Of Ganglions, or Swellings of the 'Bufe Mucoft. Ganglions of the tendons are likewife tumors of the eneyfted kind, feated in the burfae mucofse, or (heaths of the tendons which belong to tha extremities. They are moft frequently met with over the tendons upon the back of the wrift, and often likewife about thofe of the ankle and other parts of the extremities. When preffed, they are found to poffefs a confiderable degree of elalticity, from which, and from their fituation, they may generally be diftinguifhed from other eneyfted tumors. They feldom arrive at any great bulk, are pot often attended with pain, and common ly the (kin retains its natural appearance. On being laid open, they are found to contain a tough, vifeid, tranfparent fluid, refembling the glaire of an egg. They are generally produced by fprains, or contufions of the joints, or by rheumatilm. In many inftances, they go off infenfibly, without any afiillance from art ; but as this * 0ften n°t the cafe, means ought to be ufed for removing ,f them. For this purpofe, moderate friction frequently re¬ ins. peated, or gentle compreiTion applied to them by means of thin plates of lead, See. fometimes remove them. In fome inftances they have been removed by the application of blliters; but the moft. certain method is, to make a fmail pundture into the fac, and to draw a cord through it; or, after the pundture is made, to prefs out the contents, and then mjeft fome gently ftimulating fluid, as port wine and water heated blood-warm. Sometimes, in tumors of this kind, bodies of a cartilaginous nature, and of different fliapes and fizes, are found ; fome quite fmooth, others with pedun¬ cles; by which they are fuppofed by Dr Monro, in his work upon the burl® mucofe, to have been attached to the bur!*. As thefe cannot be removed by any remedy with which we are yet acquainted, it is found necceffary to dif- charge them. But as the parts may fometimes buffer from inflammation when the tumor is laid fully open, it may be pumffured at each end; and, after prefling out the contents, a fmail cord may be introduced ; after which gentle pref- iure may be applied with a comprefs and bandage over the tUm°r‘ rhe CG,rd however fhould not be continued fo long as to induce any great degree of inflam aTS th“ a of this SECT>-. « Collections here may conf,ft ofterum, blood, or pus and fynova combmed. They are moft Irequfmly met S in the jomt of the knee, and maybe produced eftber by inter! Hell or external caufes. Xhete kinds of J 95 general be diftmguilhed from each othe/ '' "* IropM , W-7 eilufto rm°nly CM ^/rnl f„elK„„ „f wellir.gs J ‘ aide chiefly in confequence of fevere rhem-natiV 'f the complaints; and when the tumor is not very laro-e ib ■c’ aat, ^on of rhe fluid may be felt by preffmZ , , , 0n, aPPears immediately after a violent bruife ft ’ ^ at,^ir“:tcl!itof £Iood: and fivelling, • w,th |r'at P*. inflammation, s’ terminating m an effiifion, there is every rea- G E R Y. nn fon to think that the contain«d fluid confifts of pus mixed Collection* with fynovia. within the Swellings of the joints are mofl apt to be confounded with colledtions in the burfas mucofe, or with matter effu-0f j0intSj fed in the adjacent cellular fubftance. From the firft; of &c. thefe they are generally diftinguifhed by the contained fluid v-— paffmg readily from one fide of the joint to the other, and from its being diffufed over the whole of it ; whereas, when it is tl..gifted contained in the burfe, the tumor is confined to a particu-lrom other lar part, and is feldom attended with much pain. afft&ions. When Inch colledtions can fafely be allowed to remain, prea^er^ the caplular ligament ought never to be opened, as they can often be removed by difeutients. Even confiderable collec¬ tions arifing from rheumatifm may comm inly be difeuffed by fridtion, fomenting the parts with warm vapour, keeping them conftantly moift with faturnine folutions, covering them properly with flannel, and applying bliflers. When thefe fail, fupporting the part with a laced flocking, or with a roller, has frequently been of fervice. But whether a rheumatic tumor can be difeuffed or not, it ought not to be opened ; for the inconvenience attending it is more in¬ tolerable than the pain and inflammation which may enfue. But when the matter would do mifehief by lodging, ic fhould be difeharged. Effufed blood and matter which fucceed high degrees of inflammation are of this kind. Blood is frequently extravafated among foft parts without much detriment; but wdien in contadf with cartilage or bone, it foon hurts them materially. The matter ought to be dif- Method of charged fo as moft effedtually to prevent the admiffion ofdifcIiarKinS air into the cavity of the joint. For this purpoie the open-the matter" ing fhould be made with a trocar; and the fkin, previoufly drawn tight to the upper part of the tumor, fhould be pul¬ led down immediately on withdrawing the canula. A piece of adhefive plafter fliould be dire&ly laid over the opening, and the whole joint fhould be firmly fupported by a flannel roller properly applied. If the patient be plethoric, he fhould be blooded to fuch au extent as his ttrength will bear ; he fhould be put upon a ftridt antiphlogiftic regi¬ men, and in every refpetft fhould be managed with caution; for inflammation being very apt to eniue, we cannot too much guard againft. it. Joints are fometimes rendered pairfful and ftiff by the for- Concre- mation of different fubitances within the capfular ligaments, i1?118 in t5v5 Thefe are fometimes loofe, and as firm as cartilage ; and^1*5 fometimes of a foft membranous nature, iimilar to thofe al¬ ready obferved in treating of iwellmgs of the burfe mu¬ cofe. In fome cafes thefe fubflances, efpecially the laft fpecies, retain nearly the lame fituation, without being much af- fe&ed either by preffure or by the motion ot the joint : in that cafe the pain is conftant, but feldom fevere. The firft fpecies, however, is commonly very moveable ; and on being touched, they flip with fuch facility that it is difficult to fix them even with the fingers., 1 heie are only painful in par¬ ticular fituations. Where thefe concretions appear, upon examination, to be Whiter- perfectly loole and detached, if the pain which they excitefectly loof* is very fevere,, we fhould venture in a cautious manner to may l)e vx- take them out, by making an inciiion into the joint. ButtradGd* if there is reafon to fuipeft that they are conne&ed with any part of the joint, the patient ought to be adviled to fubmit to the pain they induce, which in general will be rendered moderate by fhunning exercife ; biit if, notwith- handing this, it becomes infupportabk, amputation is the only relource. The limb being firmly fecured by afliflants, in that pof-Man” of Uire which admits of the body to be taken out beinn felt ex£radti»M: ‘ & them. moii within dv Caijhilav Id^ament nf Joints, f'-C, ti* S U Tl G Co'lcdtic®* mod the furgeon fhouid endeavour to fix it with ' ‘ ’ his Hauers towards the upper part of the joint, atter an at- fillant has drawn the Hein as much as pofiible upwards from the part where the inciiion is to be made. The operator with" a icaloel is now to make an irrcifion through the tegu¬ ments and.capfular ligament, direaiy upon the fab dance it- felf, of fuch a fize as will admit of its being eahly taken out s which may be done either with the finger or with the end of a blunt probe. If it is found to be connected by any fmali filaments either to the capfulat ligament or to the cartilage,s-of the joint, they fiiould be cautionflydivided, either with a probe pointed biftoury, or probe-pointed Iciltars, a,- ter drawing the fubftance itfelf as far out as it can be got. When move concretions than one are found, they (hould all be taken out at the fame opening, when this can be done ; but when it cannot, it will be better to allow the firft inci- uon to heal before attempting the fecond, fii as to avoid as much as poffible the exciting of inflammation. After the concretion is removed, the fkm fhould -,e im¬ mediately drawn over rhe wound in the capfular ligament; and the lips of the opening in the flan being laid together, they fliouid be fecured in this fituation by pieces of adheiive plaller, fo as to prevent the air from finding accels to the cavity of the joint. Till the wound be completely healed, the patient fhould not only be confined to bed, but the limb fhpuld be kept as much as pofiible in one potture, and .a flridt antiphlogiftic regimen fhould be preierved. Sect. IV. Of Spina B]fida. Spina pitida, is a tumor which fometimes appears upon the lower part of the fpine in new-born children.^ A fluc¬ tuation ie dtfiinClly perceived in it, and the fluid it contains can in feme meaiure,be prefled in at an opening between the Vertebrae. In fome cafes this opening is owing to a na¬ tural deficiency of bone 5 in others, to the feparation of the f pi nous procefies of the vertebra. _ < The difeafe proceeds from ferum collefted within the co¬ verings of the fpinal marrow. It is always fatal. Children E It Y. ('hi'P VI on the tlrarsx or aWorofn, or any of Ok large joint*, free go hu, on uie WMieA , ^ laus vent ought always to be given to the matter to prevent it, ^ burltino into thefe cavities; and when the ebfcefs is large, this llwuld be done with a trocar, or by paffing a cord thto it in order to exclude the external air. When the tumor, are not f,mated upon great cavities, it is better lo allow them to break of themCdves, as the lores commonly heal more readily, and the fear is pretty hnular it. both, the rroit proper applications to fcrophulous foies teem to be thofe of the faturnine kind, as they dimuufli inflammation, and in fome meafure prevent the fore from fpreadmg When the bones become carious, they are to be treated like carious bones from other caufes; but amputation cannot here be attended with advantage, as the d.feafe proceeds from a fault in the eonflitution. After the fores are healed up, the introduction of an iffue may afllft in preventing their IC Tumors of a fcrophulous nature are_ fometimes apt to How J be miftaken for thofe of the feirrhous kmd, and thus may f o£ be improperly extirpated. Scrophulous tumors ueeply leat- ^^, cd commonly have a degree of firmnefs, which, if they hap- a,on, pen to be feated near a fufpicious part, as clofe by the tide of a woman's breaft, may give occafion to fuch a miflake. Bu*' they may generally be diftingmflied by the foftnew even of the firmeft kind of them, when compared with feirrhus. They have always a fmooth equal furface ; whereas fclrrhus -is fomewhat unequal or knotty, and feat¬ ed in the real fubftance of the gland; and a ftiooting pain is commonly felt in it from time to time, even from its hr ft appearance. They are generally accompanied, too, with other fymptoms of fcrophula, which is not necdianly the cafe with feirrhus. Sect. V. Of Bronchocele. This is a tumor on the fore-part of the neck, feated be¬ tween the trachea and flun, termed in French goitre. In this country it is very' rare ; but it is frequent among the in¬ habitants of the Alps, and other mountainous countries. W been known .ogive fov.woov ^ ^ years ; but, in general, they linger and die in a few weeks All that art has been able to do "is to fupport the tumor by gentle preffure with a proper bandage. When a tumor of this kind is laid open or burfts, the child dies in a few hours. A tumor nearly of the fame nature with this is fonie- times met with upon different parts of the head in new¬ born children : it is formed by a fluid lodged beneath the membranes of the brain, which have been forced out at fome unofTified part of the fknil. What we have laid with reipedt to the former is exactly applicable to this. Sect. V. Of Scropbulous 'Tumors. We ftiall here only mention the furgical treatment of fcrophulous tumors, having fpoken of fcrophula in general under the article Medicine. Some praftitioners have re¬ commended poultices, &c. to bring fcrophulous tumors to fuppuration ; but the bell praftitioners have laid them afide, becaufe they increafe the foft and ipongy ftate of the paits, ioi b7 they are prevented from healing.. Treatment As external applications are ineffectual, it is better toat- of (crophu- low fcrophulous tumors to be as much expofed as poflible, as this frequently renders the fubfequent ulcer more eafily cured. The other methods recommended for difeufling thefe tumors are, the internal ufe of cicuta, burnt fponge, xnuriated barytes, a long continued ufe of the cold bath, par¬ ticularly of fea-bathing, and drinking mineral or fea-water. Thefe, to produce any effedt, fliouid be^begun early, while the tumors are fmall, and long perfifted in. When the tu- tnors come to a ftate of fuppuration, it they are leated up- 1 cafes is leareu iulhl 1 ... -.-j 0 > • -n j examined by Mr Benjamin Bell this gland was dimmifhed from the compreflion of the tumor, which was chiefly form¬ ed of condenfed cellular fubftance, with effufions in different parts of it of a vifeid brown matter. Dr Proffer confiders bronchocele as a dropfical affeClion of the thyroid gland; and in confirmation of this, he gives an account of a diffcc- tion of a difeafed gland of this kind by Dr Hunter, who found in it a great number of capfules filled with water. The fwelling is at firft foft, without pain or any evident^ - • " ‘ ■ - 1 ■ but fluftuation, and the fkin retains its natural appearance ^ lous tu mors. as the tumor advances in fize, it becomes unequally haid; the fkm acquires a copper colour, and the veins of the neck become varicofe ; the face becomes fiufhed, and the patient complains of frequent headachs, as well as of flinging pains through the body of the tumor. fL Calcined egg-fhells have been recommended by. authors It as a fpecific for this difeafe ; but little dependence is to be placed on fuch a remedy. Frequent frictions are found ufe* ful, efpecially when employed early ; faponaceous and mer¬ curial plafters, too, have in fome cafes proved ferviceable, and repeated blifters have been known to retard its progrefs. In the enlarged ftate of the tumor no remedy yet known powerful enough to difculs it. When the difeaie is far a- vanced, the removal of the tumor by an operation muft be attended with great danger, on account of the enlarge ftate of the arteries, as well as its vicinity to the common carotids. It is therefore thought by fome of the molt ex¬ perienced practitioners, that in fuch a fituation it woul no^ Chap, ro5 N.xvi ma- tcnii. sSs. to8 Warts VI. S U R be advifaMe to attempt extirpation, and that the patient fhould rather trutt to the common palliative treatment. When the tumor, however, is not much increafed, if other remedies have failed, and the difeafe is advancing, a furgeon might be warranted in attempting its extirpation. Sect. VI. Of Navi Materni, Corns, and Warts. N^evi maternt are thofe marks which frequently appear upon the bodies of children at birth, and which are fuppo- fed to originate from imprefiions made on the mind of the mother during pregnancy. They are of various forms ; their colour is likewife various ; though moft frequently re- fembling that of claret or red port-wine. Many bf thefe marks are perfectly flat, and never tife above the level of the fkin : thefe do not require the affiftance of furgery ; but in fome cales they appear in the form of fmall protuberances, which frequently increafe to a great flxe in thc'courfe of a few months. They appear to he fnm and flefhy. They fometimes hang by flender attachments to the contiguous parts, but more generally they, are fixed by broad bafes. They may be removed with as little danger as any other tu- mor of the farcomatous kind. They are fupplied indeed mote plentifully with blood than moft other tumors are ; and even fometimes they appear to be entirely formed by a congeries of fmajl blood-vefftls ; but the arteries which flip, ply them may, for the mod part, cafily be fecured by liga¬ ture. The operation fhould never be long delayed ; f< or as the five of the vefiels correfponds with that of the tumor, they fometimes are fo large as to throw out a good deal of blood berime they can be fecured. In performing it, the tumor is to be cut out, the arteries taken up, and the re- maimno fkm brought as well together as the nature of the part will allow, and kept fo by adhefive plafter or future. When the tumor is pendulous, and connefted only by a nar¬ row neck, it Ihould be extirpated by ligature. Corns are fmall hard tubercles, commonly fituated on the toes or other parts of the feet, and fometimes on the ? hey are a horny nature- They proceed from a diieafed ftate of the cuticle, occafioned by preflure. The part becomes hard and thickened, with a fmall white fub- itance in the centre, which has a difpofition to become pro¬ minent. It likewife forms a depreffioti in the fubjacent cu- tls vera’ and fometimes is faid to penetrate it. When corns sre fituated on parts much expofed to preffure, they irritate the fkm, and produce an increafed fenfibility of the part and thus occalion much pain. The belt preventative of corns is the wearing of wide Ihoes, and avoiding every kind dlfTfr; aildfUnlrf3 thls be attended to> ‘t will be'found mSd’d f° uP ‘ree fr°m them‘ Various temedies are recom- Se oart aT tYT of co”ls- One is to bathe tl.e part about half an hour in warm water, then to pare as much oft them as polhbie without giving pain, and to apply over them any emollient ointment. If this treatment e requently repeated, while prefture from Ihoes is prevent ed they generally fall off, and do not return i p e^r be aftenvards avoided. Another method is to allow them to prZZ feeureb’JfN^0'1^ pieCeS °f Perforated ^er, S .r td V™p avir'Tv'r’and af: the moft part be ea% ^7^ v,h,ch they m?y (c. 7?1 thr -.bbtrw^ ^ting the cuticle from the cutis thp mi n a -r j aldmr ^ tfie corn will be raifed a fcaV hr S ^ and may then be r^h removed by -Si”, fC' ,'7 "f tlle being now blfflered. “ b' 1,ke “r »th“ pntt that has been fnrftceTappTtf: Vff ‘'nd°lent ,"mors' wl,h a tough Vol. XVlllTart i rcnl 1>artsof the body,chiefly the IO9 G E R Y. hands and face, and more commonly in young people. When they appear in advanced life they are apt to degene¬ rate .into cancer, efpecially when of a livid colour and with a fmeoth furface. If they do not prove troublefome, no¬ thing fhonld be done to them, as they generaly either fall oft or wafte gradually away. When from their fixe or fitu- ation they require to be removed, this, if they are pendu¬ lous or have narrow necks, is eafdy done by ligature ; but if their bafes be broad, the fcalpel or efcharetic applications will be neceffary. As few, however, will fubmit to the for¬ mer, the latter are generally employed. Eicharotics of 3 nvid nature give leaf! pain, and are leaf! apt to excite in¬ flammation, which in thele cafes it is difficult to remove, and are found to be quite fufficient for the purpofe. One of the belt of thefe is crude fal ammoniac : it fhould firft be moiftened in water, and then well rubbed upon the warts two or three times a-day. Iriquid fait of tartar, and fome¬ times fpint of hartfhorn, has anfwered the fame purpofe: fome recommend alfo the juice of onions. " Warts appearing on the penis as a fymptom of venereal^31”*8 on infe&ion, are of the fame nature, and to be cured by thetheptms' fame means. Mercury is of no advantage here, aqd com¬ monly indeed does harm. When every other part of the difeafe is eradicated, the warts may generally be removed by wafhing them morning and evening in lime-water, or in a weak folution of faccharum faturni. They may be remo¬ ved alfo by the knife, and the parts from whence they are cut afterwards touched with lunar cauftic, to prevent them from returning : but when this method is pra&ifed, the ope¬ rator ought to be certain that he has removed the wart en¬ tirely, for where part has been left the moft formidable fymptoms have fometimes enfued. Sect. VII. Of Polypi. Polyp? are pendulous, flefhy, indolent tumors, fo called from their fuppofed refembiance to the animal of that name, ihey may be found in different cavities of the body, and originate from the lining membrane ; but thofe which come under furgical treatment are found in the nofe, mouth, throat, and outer paffage of the ear, and in the vagina and iro rectum. They are divided into two claffes ; the one foft Polypi di- and compreffible, the other extremely firm. Both of them ’ed 'lM(* bleed on being fretted or roughly handled. The foft kindtW° kind8’ fhriveis and contrafts in a dry atmofphere, (this is particu¬ larly the cafe with thofe of the nofe) ; but the firm are not affected by the influence of the weather. Their colour is commonly pale and tranfparent, and fometimes a deep red. . d be Pa,n at tbe commencement of the diforder is always inconsiderable ; but increafes in thofe of a hard nature as they increafe in fize. Sometimes polypi of this kind be¬ come unequal, and form ulcers over the whole furface dif- charging fetid matter in confiderable quantity. They are apt at this time, unlefs extirpated, to degenerate into cancer. Moft frequently they arife from local injury, or whatever Thd/* tends to produce and lupport an inflamed ftate of the part. Caufe* Scrophula and lues venerea, though confidered by fome au¬ thors as frequently giving rife to them, feem onlv to be ex¬ citing caufes; for in lues venerea in particular, polypi when prelent remain after the difeafe is cured. The prognofi, mift depend much upon their fituatidn and I'rJnuaj. their confidence. 1 he foft kind being- fddom painful, may be removed at any period with little danger; but the hard kind are generally not only painful, but more apt to dege¬ nerate into cancer, pr to return after being removed. The loft kind therefore may be removed in general with fuccefs* but when polypi of a harder nature exift, the prognofis will be much more unfavourable. ° With ,r4 . S U R G Polypi. With refpea to the treatment —As long as they remain ftationary, they are not to be touched ; but when they con- 113 tinue to trrow, we ought to ufe aftrmgent remedies, efpeci- Treatment. ^ f0lution of alum, a deeoaion of ohk: bark, vi¬ negar, ardent fpirits, &c. The fofter kinds of_ polypi may frequently be prevented for a long tune from mcreahng in fize, and fometimes they even become confidetably fmaller. Mercury has been found rather to make them worle; cauftic and other corroding applications have been of ufe in the fofter kind, though they have not produced a cure, be- tons have likewife been ufed with little advantage. It is therefore found neceffary to have recourfe to a more effec¬ tual pra&ice; and with this view the knife, fciffars, forceps, or limature, are more generally recommended. 1 he kmte and fciffars may be ufed when the roots of the tumor can be readily come at; but polypi are feldom fo htuated as to render excifion practicable ; and. even when they are, the hemorrhagy maybe attended with confiderable Ganger, ihe removal of a polypus by tearing or twilling it with the for¬ ceps,PlateCCCCLXXXVII.fig.4- ^ occafionally practued; but as ligatures are lefs painful, and fully as effe&ual, they are now' more generally employed. The ligatures confil of wire, catgut, filk cord, &c. Different methods have been employed for" palling thefe over polypi, according to TT- their different fituations. .Method of When the ligature is to be applied, it is to be palled double apt bing over the tumor, and conduced to the foot of it y ” a ligature to f;ne.ers 0r by flit probes, as in Plate CCvA.±-.A A A v 11. them‘ fig. C. or rings, Plate CCCCLXXXV1I. fig. 6. as may be bell fuited to the fiiape and fize of the paffage. The ends- of the ligature are then to be introduced into a fingle or double canula, as in Plate CCCCLXXXVH. fig.7- which is to be pufhed along the oppofite fide of the polypus till the end of the canula reach the root of it, when the ligature is to be drawn fomewhat tight, and fattened to the canula which is to be left in the paffage. The ligature is to be daily tightened till the tumor drop off. In this manner the lar.reft oolvpus may be removed equally well with thole of a fmaller fize. Should any part of it remain, it may be de- ftroyed by cauftic, and different inttruments are contrived for condufting this to the root of the tumor . What has been laid of the treatment of polypi m general, readily applies to thofe feated in the nofe, outer paffage of the ear, the reAum, and the vagina. It hkewife applies to thofe in the throat; only that inftead of patting the ligature through the mouth, it is to be patted through one of the noftrils. The operator is then to introduce one or two of his finders into the mouth, and open the doubling of the li¬ gature,1 which he is to pafs over the polypus, and having preffed it down to the root of it, to proceed as before di- icAed. Chap. VII. Of Difeafes of the Bones. The bones, as well as the fofter parts, are liable to be fwelled, either throughout their whole length, or to have tu¬ mors formed on particular parts of them. Exoftofis is one fpecies of tumor of the bone. According E a f t0 Mr Bromefitld, no fwelling fhould be called fo, but an excrefcence continued from a bone, like a branch trom the trunk of a tree. Under this head therefore is ranked the benign node, which maybe produced by external injury, fuch as contufions and fraAures : it can hardly be called a difeafe, as pain feldom fucceeds, but rather a deformity. There are riftngs or tumors obfervable on the bones which are often the confequents of venereal virus, and are termed ^ l1* tophi, gummiy or nodes.-Tophus is a foft tumor in the bone; TopllUS‘ and feems to be formed of a chalky fubiiance, that is inter- E R Y. Chap. VII. mediate between the ofleous fibres. Thefe cretaceous extra- Difeafe, of vafations are fometimes found on the ligaments and tendons, as well as on the bone; and may fometimes be taken out by the knife We have many in fiances where chalk flones in gouty people make their way out through the fkm of the “afoft tumor or, the furface of the bone, be-Gunml tween it and the periofteum ; and its contents refemble gum foftened, from whence it has taken its name. Poffibly, by obftrudlion in the nutrient veffels of the bone, a rupture of fome of them occafions the ferous liquor to efcape, which, by modems' its way between the fibres of the bone, arrives at its furface ; and being detained by the refiftance of the peno- fteum, its moft liquid parts being evaporated, and the re¬ mainder condenfed by the inflammation and confequent- 1Y this inelaftic covering being ftretched, it becomes m- fpiflated, and forms this fpecies of exnjhfs, as it is general y called. When tliis is the caufe, and the mdilpofition of the habit in general got the better of, preffure by a fteel mitru- ment, adapted to the part affeAed, is the proper cure u» The confirmed venereal node has the appearance of a di-Noues. varication of the offeous fibres, probably from fome mipif- fated humour obftruAing the nutrient veflels, but not extra- vafated; this occafioning an extenfion of the periofteum, produces a violent pain, which, when noAurnal, is the cha- raAeriftic of a venereal caufe. When the periofteum is thickened but the bone not affeAed, a courfe of mercury, by attenuating the obftruAed humour, and fitting it to be carried out of the body by the proper outlets, will often produce a perfeA cure : but when the bone itfeh is dlltaiLd> this method will fail. But here the divifion of the extended periofteum has been known to give perfeA eafe. The ufual method, formerly, was to apply a cauftic equal to the extent of the node, which being laid bare, required exfoliation before it could be cicatrized. If the incifion is made early, that is, before matter be formed under the m- vefting membrane, it feldom requires exfoliation ; and, as we often find that the bone itfelf is not affeAed, but only the periofteum thickened, we may be deceived even alter a care¬ ful examination: it is therefore proper that the patient fhould be pretty far advanced in a courfe of mercurial unc¬ tion before even the incifion is made ; for, fiioula the tu¬ mor decreafe, and the pain abate during the courfe, cfnrur- gical afliftance, with the knife, moft likely may become un- ^ “ Abone may become carious firft in its internal parts j and Abfc*“ that from external injury, as well as from a vitiated itate ottruefpiM the animal-fluids. Authors feem not to agree as to the ve;itufa. technical term for this kind ©f difeafe of the bones; fome calling it cancer or gangrana ojis ; others,ventnfa> \rom. the pointed exuberances ufually attendant on this dilcrder of the bone ; and fome again teredo, from the appearance at the carious bone, like wood that is worm-eaten. . It is univerfally allowed, that this difeafe takes its rile' from matter being formed either in the diploe, or in the marrow : whenever cbftruAion is begun in the veflels ex¬ panded on, or terminating in, the medullary cyils, the con- fequence will be inflammation, and, if not early removed* matter will form ; for this reafon this cafe may be called ab- ,!0 feeffus in medulla. Whenever, then, a patient complainssyn^toj of dull heavy pain, deeply fituated in the bone, poffibly c and yield to the £(ves thon^tr^8’ bUt remam diftorted the reft of their , .01 gh they have acquired a perfedt degiee of folidi- 123 ckets. intermediate fpace between it and the bone filled with extra- vafated fluid ; and caries is almoit as frequent as the fepara- tion of the periofteum. The mufcles in fuch bodies gene¬ rally appear pale and flabby. J4^ Where the affedlion of the mefenteric glands is evident, Method of Mr Bromefield aflerts, that after a dole or two of the pulviscure recom- bafilicus to empty the inteftines thoroughly, the purifiedmerided by crude quickfilver is by much the moft efficacious medicine to remove obflrudtions in thofe glands. When the belly be¬ gins to foften and fubiide, the chyle pafles without interrup¬ tion, and the child begins to get flefh ; then the cold bath becomes truly ferviceable, and the deco&ion or cold infu- fion of the Peruvian bark is a proper reftorative ; but the cold bath ufed too early, or the bark given before there is a free circulation of chyle through the ladbeals, would be very injurious. The mollities offium, in fome cafes, may be produced Of molliticj from a redundancy of the oleaginous parts of the blood, oroflium. from a laxity of the folids, by which the fluids are not fuf- ficiently attenuated, nor properly blended and mixed : the eonfequence of which will be obftru&ed perfpiration, the habit in general loaded with grofs, phlegmatic, and ferous humours, and the offiflc matter not united or condenfed as in an healthy ftate. The method of cure confirms us in the caufe of thefe fymptoms ; for, by ilrengthening the fibrous fyftem, by ufing gentle exercife, a dry'diet, good air, aro¬ matics, and cold bathing, this kind of invalids are generally reftored to health. _ Among the difeafes of the bones we may likewife take no- pa]f12f h tice of that pal/y of the lower extremities which takes place, W Jr V_ ** as is generally fuppofed, in confequence of a curvature in 'tenuties fome part of the fpine. To this diftemper both fexes andfrom cur; all ages are equally liable. When it attacks an infant of only a year or two old or under, the true caufe of it is fel- C 1 P i doin 116 ° . D.fe fe- of dom discovered until Some time after the effea has taken the Bones. jace child is faid to be uncommonly backward in [he u’fe of hls kgs, or it is thought to have received iome hurt in the birth. When the child is of an age fufficient to have already walked, and who has been able to walk, the lots of the ufe of his legs is gradual, though in general not very flow. He at hi ft complains of being very foon tired, js languid, liftlefs, and unwilling to move much or at all fcrifkly. Soon after this he may be obferved frequently to trip and {tumble, though there be no impediment in his way ; and whenever he attempts to- move brifkly, he finds that his legs involuntarily crofs each other, by which he is fiecuently thrown down without {fumbling ; and when he endeavours to ftand Hill in an erect pofture without fupport, even for a few minutes, his knees give way and bend for¬ ward. As the difterrrper advances, it will be found that he cannot, without much difficulty and deliberation, diredt ei¬ ther of his feet exadtly to any one point; and very foon after this, both kgs and thighs lofe a good deal of their na¬ tural fenfibility, and become quite ufelefs. In adults, the progrefs of the difeafe is much quicker, but the fymptoms nearly the fame. Until the curvature of the fpine is difeovered, the com¬ plaint generally paiTts for a nervous one ; but when the ftate of the back bone is adverted to, recourfe is almoft al- u R G E It Y. Chap. VIII, fide of the curvature, and in maintaining fuch difeharge un- Blood, til the patient fhall have perfedly recovered the ufe of his letting, legs To accomplifh this purpofe, I have made ufe of dif- ferent means, fuch as fetons, ifffip made by inciiion, and if- fues made by cauftic ; and although there be no very mate, rial difference, L do upon the whole prefer the laft. A le. ton is a painful and a nafty thing: betides which it frequent- ly wears through the fkin before the end for which it was made can be accomplifhed. Iffues made by mcifton, if they be large enough for the intended purpofe, are apt to be¬ come inflamed, and to be very troubiefome before they come to fuppuration ; but openings made by caulhc are not m general liable to any of thefe inconveniences, at kaft not to frequently nor in the fame degree : they are neither lo troubkfome to make or maintain. I make the efehars about this ftze and fhape on each fide the curve, ta¬ king care to leave a fufficient portion of fkin between them. In a tew days, when the efehar begins to loofen and leparate, I cut out all the middle, and put into each ... a large kidney-bean: when the bottoms of the fores are be¬ come clean by fuppuration, I fprinkk, every third or -onvt day, a fmall quantity of finely powdered cantharides on them, by which the lores are prevented from contracting, une is aimoAL ve (hall in the firf cure of this diltemper, from oblervlng the cafe of a youth of and (hall afterwards proceed to treat partrcularly of bloody -bo -as reftored to the ufe pf his limbs immedratel), ^“f^^^^opLtion, thefituation of the patient, and of the operator likewife, ought to be precifely fixed. The fituation of a patient, during the operation o*p0{iurr i>f blood-letting, has a confiderable influence on the effects pro- th£ duced, and therefore merits particular attention. In lome after a feemingly accidental abfeefs near the part. 1*rom this he was inclined to think, that the curvature of the Ipiue was not the original caufe of the diforder, but that the fur¬ rounding parts were predifpofed towards it by fome affection ef the folids and fluids there ; and he was confirmed in thefe «f the folids and fluids there ; and ^asconnrm u,u ; of \hls remedy t0 evacuate a con- fufpicions by a variety of appearances which ^ able quantity of blood without inducing fainting: When both the being uudy and upon difredion of the lubject M r , 1 former experience it is known • after death all of which are narrated at full length in lus treatife upon this fubjedi. . ,.r . “ The remedy (fays he) for this moft dreadful diieafe confifts merely in procuring a large difeharge of matter, by fuppuration, from, underneath the inembrana adipoia on each this is the cafe, and when from former experience it is known that the patient is liable during the evacuation to ffill into a faintifh ftate, a horizontal pofture ought to be preferred to every other; for fainting is not near fo ready to occur in a horizontal as in an eredt pofture.' It now and then happens, however, Chap. VI IT, SURGERY. Blood- however, that one material advantage expe&ed from the now to fpeak of the method of ufing It operation of blood-letting, is the produftion of a date of letting. I3T Method of comp ef¬ fing the vein. 13a iftrument i be ufed. deliquium; as, for inftauce, in cafes of ilranijulated her¬ nia, where a general relaxation of the fyftem is fometimes definable. In all fuch circumftances, inflead of a horizontal poiture, the more ere£t the patient is kept, the more readily will a ftate of fainting be induced. The patient ought to be fo placed, that the principal light of the apartment fiiali fall d redfly upon the part to be operated upon, that the vein to be opened may be made as aoparent as pofftble. II. I he patient being properly feated, the next ftep is, by means of a proper bandage of (ilk, linen, or woollen cloth, which has more elafticity, io tocomprefs the vein in¬ tended to be opened, as to prevent the blood from returning to the heart. An equal degree of preflure ought to be ap¬ plied to all the other veins of the part : tor if this be not at¬ tended to, the communication preferved by the collateral con-el ponding branches would render the preffure upon any one particular vein of very little importance. This oreffure upon the veins, by inducing an accumulation of their con¬ tents, tends to bring them more evidently into view, ami confequently renders it eafier for the operator to effed a proper opening than he would otherwife find it. The pref- juie, however, ought never to be carried fo far as to obltrucf the circulation in the correfponding arteries, otherwife no dilcharge oi blood can take place. When we fee that it has the eftedt of raifing the veins, while at the fame time the puliation of the artery is diftin&ly felt in that part of the member which lies on the fide of the ligature mofl diilant tron uhe heart, we may be certain that it is to a very proper c cgiee, and that it ought not to be carried farther ; for by the iwelling of the veins we are fure that they are lufficient- Jy comprefled; and by the arteries continuing to beat, it is evident that a continued flow of blood may be1 expefted. Hi. I he reflux of blood to the heart being in this man-' ner prevented, the next queflion to be determined is, the beu method of makings opening into the vein. Different mffrurr.ents have.been invented for this purpofe ; but there are two only which have been retained in ufe, and which are all there tore that here require to be mentioned. Thefe are the lancet and the phlegm. .This laft, on being olaced im- mediately on the part to be cut, is, by means of a fpring, fhthedAUrdtn )rr1ut0-the Van’ and Pro^ces an opening of the exadf hze of the inffrument employed. hrYhfr in8 dettfrminedrto the lancet, which is by far the fafeft, the form of that inftrument is next the objel enthdvaf^ brroad fll"uldered ^ncet ought to be laid enu-itly afide; becaufe the broadnefs of its (boulders produ¬ ces alwavs a wound m the evi-f-i-n-t r ■* , three r f . eternal teguments of perhaps three times the fize of the opening made in the vein • a cir- cumftance which adds no advantage whatever to the’opera- rendereVr COntrfy’ 11 Products much unneceffary pain ; ftoppage o'tlie'hln ^ mattei' to command a hp g the blood ; and the wounds produced bv it are SZ'Lt £XtCnf'Ve “ “ b' riateccccLxxxviTs,0" t-co“trary' ;eprcre"ted p,i ‘ . PX’h ; S tCgUm'"tS aad tc!" very little iWj.por.adr wra% of no <0' t'e'! ing made with one ° ^ 0°d Prodi,ced b7 an open- to with g^t eafe •f hrtS’ 18 C°mmonly a ftop upon therein lmmedl^ely on removing the ligature 1V forni of kucet being thus fixed upon, we come — a The furgeon and patient being both properly feated, and the ligature having been applied for a fhort fpace of time in order to produce fome degree of fwelling in the veins, that vein is to be made Method of choice of which, at the fame time that it appears confpicu-reforming oufiy enough, is found to roll lefs than the others on being,be preffed upon by the fingers. It is fcarceiy thought necef-ti0n* fary to obferve here, that when a vein appears to be fo im¬ mediately connedfed with a contiguous artery or tendon, as evidently to produce fome rifk of wounding thefe parts ia the operation, another vein not liable to fuch hazard, if it can be procured, ought undoubtedly to be preferred. Veins may lie diredfly above both arteries and tendons, and yet no manner of rifle be incurred by opening them, provided the operator is fufficiently fteady and attentive ; but it does now and then happen, that veins are fo nearly and intimate¬ ly connetkd with thefe parts, as to render it hazardous even for the moll dexterous furgeon to attempt this opera¬ tion. ri he vein being at lafl made choice of, the furgeon, if he is to nfe his right-hand in the opeiation, takes a firm hold of the member from whence the blood is to be drawn with his left, and with the thumb of the fame hand he is now to make fuch a degree of preffure upon the vein, about an inch and a half below the part where the orifice is to be made, as not only to render the ficin and teguments fome- what tenfe; but at tKe fame time to interrupt for a little all communication between the under part of the vein and that portion of it lying between the ligature and the thumb pla¬ ced as thus diredled. The lancet being drawn out fo as to form nearly a right angle with the feales, the operator now takes it between the finger and thumb of his right-hand ; and leaving at leaft one half of the blade uncovered, he refts his hand on the middle-finger, ring-finger, and little-finger, all placed as con¬ veniently as poffible in the neighbourhood of the vein from, whence the blood is to be taken ; and having pufhed the point of the inftrument freely through the fkin and tegu¬ ments into the vein, he now carries it forward in an oblique direction, till the orifice is of the fize lie inclines to have*it; taking care, during the time of pufhing on the lancet, that its point be kept in as ftraight a direction as pofftble, for fear of dipping into the parts below. - he inftrument is now to be withdrawn ; and the fur¬ geon, removing the thumb of his left hand, is to allow the \cin to empty itielf freely into the diftetent cups prevtoufly provided for the purpofe. It is of importance to obferve, that during the time the blood is difeharging, the member ought to be kept in exa&dy the fame pofture it was in when the lancet was firffc introduced : otherwile the orifice in the fkin is apt to flip over the opening in the vein ; a circumftance which always, proves inconvenient, and on fome occafions produces a good deal of trouble by the blood from the vein infinuatim* itfelf into the furrounding cellular fubftance. r I‘- W,he? the v.ein is ProPerly cut> and the orifice is made Method 0* umciently large, it rarely occurs that any difficulty is expe-producing nenced in procuring all the blood that is wanted; Uuta ^u®t'cnt. when this laft circumftanee occurs, from the patient beco-L1l0W,°f mmg faintifh. a ftream of frefh air ought to be* admitted to ^ the apartment, wine or fome other cordial fhould be admi- niftertd, and the patient ought to be laid in a horizon¬ tal pofture. By thefe means the faintifhnefs will in. general be foon removed : but if ftill the blood fhould not flow free¬ ly, the member ought to be put into all the variety of pofi- turns that can probably affift in bringing the openings of the 1km and other teguments to eorrefpond with that of the van; which will foon be known to have happened by the blood S IT R Venefec- blood beginning inftantly to flow. Throwing the mufclea -t’on in aif- Gf the part into conftant aftion, by giving the patient a cane fetent Parts r - - ^ . *- f Kia fc ent PartsQr anv Fothcr firm fubftance to turn frequently round in his oi the J5o~ , , ^ , .1 _ in flip m. will often • dy ^35- hand'when the operation is done in the arm, will often an- fwer in producing a conftant flow of blood hoin^ a vein when every other means has failed : And, laftly, when the pulfe in the inferior part of the member is felt very leeble, or efpecially if it cannot be diftinguifhed at all, we may be thereby rendered certain that the ligature is too tight, and may in general have it in our power to produce an immediate flow of blood, by removing the compreflion thus improperly made upon the arteries of the part. . Method of VI. A quantity of blood proportioned to the natuie o (topping tbe diforder being thus difcharged, the preflure upon the too great a fuperior part Df the vein ftiould be immediately removed ; £uX' and this being done, if the fpear-pointed lancet has been ufed, all farther lofs of bleed will in general ftop immediate¬ ly. 1 he contrary of this, however, fometimes occurs, and blood continues to flow freely even after the ligature is re¬ moved. When this is the cafe, the operator ought to com- prefs the vein both above and below the orifice, by means* of the finger and thumb of orie hand, fo as to prevent any farther lofs of blood. This being done, and the orifice be¬ ing cleared of every particle of blood, the fides of it fhould be laid as exa&ly together as pofiible ; and a piece of court or any other adhefive plafter being fo applied as to retain them, it will feldom happen that any kind of bandage is ne- ceffary : but when the blood has iflued with uncommon vio¬ lence during the operation, and has been difficult to com¬ mand after the removal of the ligature, in fuch inftances it will be prudent to apply a fmall comprefs of linen over the plafter, and to fecure the whole with a linen roller properly applied round the member. Sect. II *36 Venefec- tion in the arm. Of VcnefeShn in different Parts of the Body. When venefe&ion is to be performed in the arm, the li¬ gature for flopping the circulation ought to be placed about an inch or an inch and a half above the joint ot the elbow, and brought twice round': in order to prevent the ends ol it from interfering with the lancet, the knot ffiould be made on the outfide of the arm. In general, one knot might an- fwer; but a flip-knot being made above the firit, renders it more fecure, and it is very eafily done. In forming the choice of a vein from whence blood is to be taken, the general rules we have already laid down upon this point mull be here particularly attended to. In gene¬ ral the artery lies fo low in this place, that the median bafi- lic vein, under which it commonly runs, may be opened with perfedt fafety; and as this vein in general appears more con- ipicuous than any of the others, probably t rom the continued puliation of the artery below obftrudting in tome mealure the paflage of its contents, it is in this refped: therefore more properly calculated for this operation than any of the others. Other circumftances occur too which render the median ba filic preferable to the cephalic or median cephalic veins for the operation of blood-letting. J he former, viz. the me¬ dian bafilic, is lefs deeply covered with cellular fubltance ; and by lying towards the inner part of the arm, it is more thinly covered with the tendinous expanlion of the biceps mufeie than either of the others. From thefe circumftan¬ ces, the operation is always attended with lefs pain when done in this vein than in any of the others. In very corpulent people, it fometimes happens that all the larger veins he fo deep as not to be dilcovered by the eye ; but when they are lenfibly felt by the fingers, even although they cannot be feen, they may be always opened with freedom. In a few inftances, however, they can neither be diftinguilhed by the eye nor by the finger : in iuch a ft' G E- R Y. o Chap. VIII, tuation, as they may in general be met with about the wrift Ven«fet. or on the back-pa*t of the hand, the ligature ffiould be re-'™'NIL moved from the upper part of the arm ; and being apphedof» about half way between the elbow and wnft, the veins be-dy. low will thereby be brought into view; and wherever a vein can be evidently obierved, there can be no danger in having recourfe to the operation. q; There is only one vein of the neck, viz. the poftenorVenefec external jugular, which can eafily be brought fo much in to to view as to be with propriety opened ; and even this hesnec' deeply covered with parts, not only with the fkin and cellu. lar fubftance, but with the fibres of the platifma myoides mufcle; fo that a confiderable degree of preffure becomes neceftary in order to raile it to any height. With a view to produce this, the operator s thumb is commonly advifed to be plac ed upon the vein, fo as to comprefs it effe&ually about an inch or an inch and a half below where the open¬ ing is to be made. This, however, feldom proves fufficient for the purpofe, as the blood, on being flopped in its pro. grefs through this branch, eafily finds a paflage to the other veins ; fo that unlefs the principal vein on the other fide of the neck is alfo compreffed, the vein to be opened can never be fully diftended. In order to effed this, a firm comprefs of linen ffiould be applied on the largeft vein on the oppo- fite fide of the neck ; and an ordinary garter, or any other proper ligature, being laid dire&ly over it, ffiould be tied with a firm knot below the oppofite arm-pit ; taking care to make fuch a degree of preflure, as to put an entire ftop to the circulation in the vein, which in this way may be eafily effedled without producing any obftru&ion to the patient s breathing. But to prevent every inconvenience of this kind, fee an inftrument contrived for the purpofe, Plate CCCCLXXXVII. fig. 9. This being done, and the patient’s head properly nip- ported, the operator, with the thumb of his left hand, is now to make a fufficient preflure upon the vein to be open¬ ed ; and with the lancet in his right hand is to penetrate at once into the vein ; and before withdrawing the inftrument, an orifice ftiould be made large enough for the intended eva¬ cuation. It may be proper to obferve, that a more extern five opening ought always to be made here than is n.ecefiary in the arm, otherwife the quantity of blood is generally pie- cured with difficulty: and befides, there is not the lame ne- ceffity for caution on this point here that there is in the arm; for it leldom or never happens that any difficulty oc¬ curs in this fituation, in putting a ftop to the blood after the preffure is removed from the veins ; all that is common¬ ly neceffary for this purpofe being a flip of adhdive plafter without any bandage whatever. In order to bring the vein more clearly into view, io as afterwards to be able to open it with more exadtnels, it has been recommended, that the fkin, cellular fubftance, and mufcular fibres covering the vein, ffiould be previoufly divi 1 i •.! r 1 11 r a* _ i .A, s-U ^ o inti ded with a fcalpel before attempting to puffi the lancet into it. There is not, however, any neceffity for this precau¬ tion, as it rarely happens that any difficulty is experienced in procuring a free difehatge of blood by opening the vein and teguments at once in the manner diredltd. And it is here, as in every inftance where it is neceffary to take blood by a lancet, if it is not done at once, the patient is much difappointed, and is fure to attribute the failure entirely to a fault in the operator. „ _ ^ Wrhen blood is to be difcharged from the veins of the £ .„,( ankle or feet, the ligature being applied a little above tne^5$ n 1J - - — 7 - ~ C) C3 A A . • A ankle-joint, all the branches of the vena faphena, both Wf.jt the infide and outfide of the foot, come at once int° view; and as this vein lies everywhere very fuperficiab being in general covered with fldn onlyj wherever a pro' U R dy fchap.VIH. t S Venefec- per vein appears eonfpicuoufly it may with fafety be open- tion in dif e(^ oTthe Bo-S With a view to encourage the difcharge of blood, it has been a conftant pradlice in blood-letting, in thefe veins, to ■ dip the feet into warm water immediately on the orifice be¬ ing made. But this is a very inaccurate method of proceed¬ ing, as the quantity of blood taken in this manner can never be afcertained with precihon ; for the blood being all mixed with the water, the operator can never be in any degree cer¬ tain as to this point : and beiides, there does not appear to be any neceffity for this afliftance; for when the compref- fion of the fuperior part of the veins is made effectual, and the orifice is of a proper fize, there is feldom more difficulty in obtaining a full difcharge of blood from the veins or thefe parts than from any other veins of the body. On removing the ligature, the difcharge is generally flop¬ ped at once ; as there is no other method of effeAmg it, immerfing the parts in warm water may in fuch circumftances be a very neceffirry meafure. mafec- t ooi -are leveralwavsof performing the onpratlnn/O'i 1 1 r 'h' f "g “ ‘V O? We M'here ! the patient is to be feated conveniently on the bed fide or on l Aur „„h his haad held in a propa, Uure bp an affiSant • which done, the ftirtieon majtes a tranf.erfe incifion with a ance, upon the turpid fmall ve/Tels in the corner Jf the X’lc tl 0r.CUt tl,em ecrofs. Some “Iffd K ,pa,r fc:flar;> of a lancet, to divide the ftmlli’jT m U ',ther of the eyelids mult be the vclH- I0™ °fh5 bl' the lingers of one hand, while again derae th' rY !"ftrTjnts hfht in the other. Some, Wore t7d“e‘Tl 'e l't 'k ? Cr0oked time held afunder b ’ mr ye' bemK ■» ‘he mean thus opened of divhiT a® The r,n',ll ve,r‘',s bting P divided, their diicharge of blood ffiould be Of Arteriotomy. Whatever particular advantages may in theory have been expedled from arteriotomy, and however fome of its fupporters may have recommended it, not only as being in many inftanccs preferable to venefe&ion, but as an opera¬ tion perfedlly fafe even in veflfels of confiderable fize ; yet the moft ftrermous friends to the prance have fhrunk from , any real attempt of this kind on the larger arteries. In-^y fddom fiances have no doubt occurred of large arteries havingpradiftd. been opened without any danger enfuing ; but thefe are fo exceedingly rare, that no pra&itioner of experience will, uom that confideratron, be induced coolly to proceed to open any artery of importance. The fmaller branches of arteries may indeed be opened with great fafety, when they are not deeply covered, and efpecially when they lie contiguous to bones ; but in any of the larger arteries, the attempt muft be always attended with fo much hazard,’ and the advantages to be expected from it, in preference to venefeclion, are appearently fo trifling, as muft in all pro¬ bability prevent it from ever being carried into execution. There are veiy few arteries, therefore, which, with any Arteries propriety, can be opened 1 the different branches of theufuaIiy o- temporal are the only arteries indeed from whence blood,pened* in ordinary p raft ice, is ever taken; for although the opening of fome other branches of arteries has by fome been pro- poled, yet they are fituated in fuch a. manner that they either cannot be readily come at, or being in the neighbour-- hood of fo large nerves, the opening of them might be attended with badconfequences. In performing this opera-,., f44- , tion on any of the temporal branches, if the artery lies fu- p r/ormiml perficial, it may be done with one pufli of the lancet, in the opera." •the fame manner as was diredled for venefeftion; buttiou‘ when the artery lies deeply covered with cellular fubftance, it is always neceffary to lay it fairly open to view, before making the orifice with the lancet : for in all the fmaller arteries, when they are cut entirely acrofs, there is little chance of being able to procure any confiderable quanti¬ ty blood from them ; as, when divided in this manner, they are fure to retraft confiderably within the furround-- iug parts, which commonly-puts a flop to all farther evacu¬ ation. Some degree of nicety is alfo neceffary in making the opening into the artery of a proper oblique direftion, neither quite acrofs nor direftly longitudinal ; for a longitudinal opening never bleeds fo freely, either in an artery or in a vein, as when its direftion is iomewhat oblique.. If the opening has been properly made, and if the artery is of any tolerable fize, it will at once difcharge very freely without any eompreffion ; but when the evacuation does not go on fo well as could be wifhed, the difcharge may be al¬ ways affifted by compreffirg the artery immediately above the orifice, between it and the correfponding veins. The quantity of blood being thus difeharged, it will commonly happen, that a very flight compreffion on thefe fmaller ar¬ teries will fuffige for putting a flop to the evacuation : and . k wh&tevsr 145 ?V?ethod of tl«e blood- I2o 1 S U R G Topical whatever prefTure is found neoefiary, may be hore applied in Blooding. t^e parne manner as was directed in venefedtion. "v 1 ft happens, however, in fome inftances, that this does not fucceed, the orifice continuing to burft out from time to time, fp as to be productive of much diftrefs and incon¬ venience. In this fituation there are three different methods by which we may with tolerable certainty put a flop to the farther difchargc of blood, iff, If the artery is Imafl, as all the branches of the temporal arteries commonly are, the cutting it entirely aero is, exadtly at the orifice made with the lancet, by allowing it to retraCf within the furrounding parts, generally outs an immediate ftop to the difcharge. zd, When that is not confented to, we have it always in^our power to fecure the bleeding veffel with a ligature, as we would do an artery accidentally divided in any part of the body. And, laftly, if neither of thefe methods is agreed to by the patient, we can, by means of a conftant regular preffure, obliterate the cavity of the artery at the place where the operation has bees perfotmed, by producing the accre tion of its fides. Different bandages have been contrived for compreffing the temporal artery ; but none ot them an- fwer the purpofe fo eafdy and fo effedfually as the one figured in Plate CCCCLXXXVII. fg- to. ibis method is more tedious ; but to timid patients it generally proves more accex>table than either of the other two. Sect. IV. Of Topical Blooding. When, either from the feverity of a local fixed pain, or from any other caufe, it is wifhed to evacuate blood dire&ly from the fmall veffels of the part afFeckd, mftead of open¬ ing any of the larger arteries or veins, the following are the different modes propoled for effetfling it, viz by means of leeches ; by flight fcar ifications with the (boulder or edge of a lancet ; and, laftly, by means of an inftrument term- ed a fiarificator, (Plate CCCCIjXXXVII. fig. ) I.) ; in hfoodhig ^ which fixteen or twenty lancets are commonly placed, in with the fuch a manner, that, when the inftrument is applied to the fcarificator part affedted, the whole number of lancets contained in it are, by means of a ftrong fpring, puft-ed fuddenly into it, to the depth at which the inftrument has been previoufly regulated. This being done, as the fmaller blood-veflels only by this operation are ever intended to be cut, and as thefe do not commonly difcharge freely, fome means or other become neceffary for promoting the evacuation. Various methods have been propoled for this purpofe. Glaffes fitted to the form of the affected parts, with a fmall hole in the bottom of each, were long ago contrived ; and thefe being placed upon the fcarified parts, a degree of fac¬ tion was produced by a perfon’s mouth fufficient for nearly exhaufting the air contained in the glafs : and this accord¬ ingly was a fare enough method ©1 inoreafing the evacua¬ tion of blood to a certain extent. But as this was attended with a good deal of trouble, and befides did not on every occafion prove altogether effectual, an exhaufting iyringe was at laft adapted to the glafs : which did indeed anlwer as a very certain method of extracting the air contained in it ; but the application of this inftrument lor any length of time is very troublefome, and it is difficult to preierve the fyringe always air-tight. The application of heat to the cupping-fojfcs, reprefented an Plate CCCCLXXXVII. fig. I2. has been found to rarefy the air contained in them to a degree Efficient for produ¬ cing a very confiderable fuCtion. And as the inftrument in this fimple form anfwers the purpofe in view with very little trouble to the operator, and as it is at all times eafi- ly obtained, the ufe of the fyringe has therefore been laid afide. 147 And cup- ping-glaf- fcgSo E R Y, Chap. Vi! There are different methods adopted for thus applying Top;CJ| heat to the cavity of the glafs. By fupporting the mouth Bl(,'4 of it for a few feconds above the flame of a taper, the air may be fufficiently rarefied ; but it the flame is not kept exaCtiy in the middle, but is allowed to touch either the fides or bottom of the glafs, it is very apt to make it crack. A more certain, as well as an eafter, method of applying the heat, is to dip a piece of foft bibulous paper in ipirit of wine ; and having fet it on fire, to put it into the bottom of the glafs, and, on its being nearly extinguifhed, to apply the mouth of the inftrument direCtly upon the fcaritied part. This degree of heat, which may be always regu¬ lated by the fize of the piece of paper, and which it fs evi. dent ought to be always in proportion to the fize of the glafs, if long enough applied, proves always fufficient for rarefying the air very effeClually, and at the fame time, if done with any manner of caution, never injures the glafs in the leaft. The giafs having been thus applied, if the fcarificationj have been properly made, they inftantly be -in to difcharge freely : and fo foon as the inftrument is nearly full of blood, it fhould be taken away ; which may be always eafily done by raifing one fide of it, fo as to give aceefs to the external air. When more blood is wiihed to be taken, the parts ffiould be bathed with w^arm water; and being made per- ftCfly dry, another glafs, exaCfly the fize of the former, ffiould be inllantly applied in the very fame manner: and thus, if the fcarifieator has been made to pufh to a fufficient depth, fo as to have cut all the cutaneous veffcls of the part, almoft any neceffary c]uantity of blood may be obtained. It fometimes happens, however, that the full quantity in¬ tended to be diicharged cannot be got at one place. In fuch a cafe, the fcarificator muff be again applied on a part as contiguous to the other as poffible ; and this being done, the application of the glaffes muft alfo be renewed as before. When it is wifhed to difcharge the quantity of blood as quickly as pofiible, two or more glaft'es may be applied at once on contiguous parts previoufly {carified ; aud, on fome occafions, the quantity of blood is more quickly ob¬ tained by the cupping-glaffes being applied for a few fe¬ conds upon the parts to be afterwards fcarified. The fac¬ tion produced by the glaffes may poffibly have fome in¬ fluence in bringing the more deep-ieated veffels into nearer contaift with the fkin, fo that more of them will be cut by the fcarificator. A fufficient quantity of blood being procured, the wounds made by the different lancets fhould be all perfeftly cleared of blood ; and a bit of foft linen or charpie, dipped in a lit¬ tle milk or cream, applied over the wrhole, is the only dref- fing that is neceffary. When dry linen is applied, it not only creates more uneafmefs to the patient, but renders the wounds more apt to fefter than when it has been prcvioufly wretted in the manner direfted. 4 Dry cupping confifts in the application of the cupping-DrT1? glaffes diredtly to the parts affefted, without the ufe of theF^' fcarificator. By this means a tumor is produced upon the part ; and where any advantage is to be expected from a determination of blood to a particular fpot, it may p'°* bably be more eafily accomplifhtd by this means than by any other. When the part from which it is intended to produce a local evacuation of this kind is fo fituated, that a fcarifica¬ tor and cupping-glaffes can be applied, this method is great¬ ly preferable to every other; but in inflammatory affetfions of the eye, of the nofe, and of other parts of the face, &c. n? the fcarificator cannot be properly applied dircdfly to the paits affedted. In fuch inftances, leeches are commonly •7 1 had Chap, IX, S U R G iffucs. ^ had recourfe to, as they can be placed upon almoft any fpot ' from whence we would wi/h to difeharge blood. In the application of thefe animals, the moft effectual method of making them iix upon a particular fpot, is to confine them to the part by means of a fmall wine-glafs. Allowing them to creep upon a dry cloth, or upon a dry hoard, for a few minutes before application, makes them fix more readily ; and moiftening and cooling the parts on which they are intended to fix, either with milk, cream, or blood, tends alfo to.caufe them adhere much more fpeedily than they otherwae would do. So foon as the leeches have fepaiated, the ordinary method of promoting the difeharge of blood, is to cover the parts with linen cloths wet in warm water. In feme fituations, ‘this may probably be as effeftual a method as any other; but wherever the cupping-glaffes canoe applied over the wounds, they anfwer the purpofe much more effe&ually. ^ ^ Y. Chap. IX. Of IJJues. E R The feton is ufed where a large quantity 6f matter is wanted, and efpecially where it is wilhed for from deep feated parts. It is frequently ufed in the back of the neck n foi difea.es of the head or eyes, or between two of the ribs in afteftions of the bread:.. When the cord, which is to be madeor threads of cotton or filk, is to be introduced, the parts at which it is to enter and pafs out fhould be previoufiy marked with ink, and a fmall part of the cord being befmeared with fome "mild oint- ,and pafred thrmjg:h the eye of the feton-needle, Plate %• l3’ the part is to be fupported by an affiftafit, and the needle. palled fairly through, leaving a few inches of the cord hanging out. The needle is now°to be removed and the part drefTed. By this method matter is produced in quantity proportioned to the degree of irri¬ tation applied; and this can be increafcd or dirninilhed by covering the cord daily before it is drawn with an irritating or mild ointment. • ^ '"ico TTfe of if- fues. Issues are a kmd of artificial ulcers formed in different paits of tne body with a view to procure a difeharge of difoniismatter> W11Ch ,S freqUently of advancage in different Wer" f?rmerl^ °f 0P1*m'on that Served ao drains to carry off the noxious humours from the blood poflible. But as it is now known that they prove ufeful merely by the quantity of matter which thly^fford, hey c n^Te" 7 CCd ferC WJI1 °CCafi- ^ leaft in'- convenience. I he moft proper parts for them are, the nape n e m-The V if m'd,d,e’ m,,ter’. a'“1 fore P>rt “f *-nf merus the hollow above the inner fide of the knee - or ether fide of the fpme of the back ; or between two of the foAl^pro eft7"1" ^ a fuffici‘ency op cellular fubftance ,°f the parts beneatfa : the7 ought never or thinfc °Ve; Lhe belIy of a mufdc > ^ «er a ,e„do" The It d b0ni 5 nr°r near any lar^e blood-veffel. ar'’ thcbii“> thap=a- Th'U,"er- S'ASff!? “ ^ is Chap, X. Of Sutures and Ligatures of Arteries. Of Sutures. Sect. I. The intention of futures is to unite parts which have been divided, and where the retra&io-n of the lips of the wound has been confiderable. The futures in ordinary ufe at prefent, among furgeons, are the interrupted, the quil- led and the twilled. Befides thefe futures, adhefive planers are ufed for uniting the lips of wounds, which have been termed the falfe or dry future, in oppofition to the others which have obtained the name of true or bloody. e true future is ufed in cafes of deep wounds, while the iahe is employed in thofe of a fuperficial nature. rp. , ± J ** AiCiLU ihe interrupted future is made as follows. The wound 151 iffue. moved a n c ’ uwc, arter the bhiter is re- inflamed, the ^ Part. be ™oh M2 The pea- iiiue. one alternately. ^Ue °lntment and a mild a wCoft 'ft,,Cr by,mak;ag a" ™;f.on with peas; iougt Gentian root, or orange-peas are ufed PWl’ klfney'beans’ is made by an incifion the h • n,, ^'be,n the opening cut through, of a fizeVnffl ’ °U d be Pinched up and be p„t info it But wh^ f” ,0 JeCe‘Ve ti,e to common cauflicor lapis infe r to be, done b7 cauftic, the it ounln to be releTd to a oft °f ^ beft = foap, to prevent i frof r P r W,*h »little »«=r or loft with “ fmall bole cut in thefemr “Sf iti“lb0 P!all‘-;r> P^ced, and the cauftic pafte Lead un^ It be Prev.Iouny centre. Over the whole P'„ .uP0n the hole in the Placed to prevent am- tj- f plafter {hould be twelve hours, the while m-IvX ^ cfcfw^ In tenor i'our days the efeha- will f ^ C rem”ved» aT1d in three or be filled with peaf ^ the ^ning may mentioned. * ^ tbo other fubftances already Vol. XVIII. Part I. i ao iuuuws. i ne wouna , r, ^ being tmpjicd of thegrumous blood, ond the affillant taking"'^ care bat the bps ofhe quite eve,,, the burgeon in carel fr fully to carry the needles from tbe bottom outwards; ulmg the caution of making them come out far enough from th“ edge of the wound, which will not only facilitate the palling the hgature but will alio prevent it from cutting through the linn and flefh ; as many more flitches as may be required will be only repetitions of the fame procefs. The threads being a 1 paffed, let thole be tuft tied which are in the middle of t ie wound : though, if the lips are held carefully together all the while, as_ they fhould be, it will be of no great con- fequence which is done firft. The moft ufeful kind of knot is a fingle one firft, and then a flip-knot, which may be loofened upon any confiderable inflammation taking place It a violent inflammation fhould fucceed, loofening the liga'i ture only will not fufhee ; it mufl be cut through and drawn away, and the wound be treated afterwards without any future When the wound is fmall, the Ids ft is difturbed y ^effing the better ; but in large ones, there will fome- tmies be a coniiderable difeharge ; and if the threads be not cautioufiy earned through the bottom of it, abfcefles will frequently enfue from the matter being pent up under ncath, and not finding iffue. If no accidfnf Irapn^ afS tl.e bps are firmly agglutinated, the ligatures are to be re* moved, and the orifices which they leave dreffed. it will readily be underftood, that the flresgth of the hVa- ture and (me of the needle ought always to be proportionable to the depth of the fore and retraftion of the pIrtSP The pro¬ per form of needles is reprefented in PI. CCCCLXXXVII, O * rj1 rou{l ld-ewJfe be remembered, that during the cure the uture muft be always affifted by the application of bandage aud°SeiWt 'f I1' T1Uein]l of the S^ateft importance; and that fort of bandage with two heads, and a flit in the middle. J?,2 Suture.'. I5J Of the quilled iuiurc. U R E R Y. Chap. X. it 6 Of the tw ifled future. «i7 Ufes to which it may be put Ij8 Method of employ ir.g the twiited future. middle, which is by much the belt, will in moft cafes be found practicable. . .... In deep wounds, attended tvith much retra&ion, it is al¬ ways a necdlary precaution, to afiift the operation of the ligatures by means of bandages, fo applied as to afford as much fupport as poffible to the divided parts t But even with every afliftance of this nature, it now and then hap¬ pens, that the divided parts cannot be kept together,. re- tradfion occurs to a greater or lefier degree, and the liga¬ tures of courfe cut afunder the foft parts they were at firft. made to furround. With a view to prevent this receding of the teguments and other parts, it was long ago propofed to add to the in¬ terrupted future what was fuppofed would afford an ad¬ ditional fupport, viz. quills, or pieces of plafler rolled up into the form of quills; one of which being placed on each fide of the wound, the double of the ligature is made to in¬ clude the one, and the knot to prefs diredtly upon the other, inftead of being made immediately on the edges of the fore, as was directed for interrupted futures. _ It is at once evident, however, that the ligatures muft here make the fame degree of preffure on the parts tnrough which they pafs as they do in the interrupted future ; and this being the cafe, it is equally obvious, that the interpo- fition of thefe fubftances cannot be of any ufe. . ihis futme is accordingly now very rarely pra&ifed, and it is probable that it will be foon laid entirely afide. By the term tnxnjlcdfuture^ is meant that fpecies of liga¬ ture by which parts, either naturally or artificially feparated, are united together, by means of ftrong threads properly twifted round pins or needles pufhed through the edges of the divided parts. This future is commonly employed for the purpofe of uniting the parts in cafes of hare-lip ; and this indeed is almoft the only ufe to which it has been hitherto applied : But it may with gieat advantage be put in practice in a variety of other cafes, particularly in all artificial or acci¬ dental divifions either of the lips or cheeks ; and in every wound in other paxts that does not run deep, and in which futures are neceffary, this future is preferable to the interrupt¬ ed or any other, The pins made ufe of for twilling the threads upon ought to be made of a flat form, fo as not to cut the parts through which they pafs lo readily as the ligatures employed in the interrupted future. And thus one great ©bjeclion to the latter is very effe&ually obviated : for every pra£titioner muft be fenfible of this being the moil faulty part of the interrupted future, that when mufcular parts are divided fo as to produce much retratlion, the li¬ gatures employed for retaining them almoft conflantly cut them through before a reunion is accomplifhed ; whereas the flatnefs of the pins ufed in the twifted future, and upon which the whole preffure produced by the ligatuers is made to reft, proves in general a very effe6lual preventative againft all fueh occurrences. The pins ufed in this operation are reprefented in Plate CCCCLXXXVII. fig. ly. They are commonly made of gold or filver ; and in order to make them pals with gieater eafe, Heel points are added to them. They are fometimes ufed, however, of gold or filver alone. The manner of performing this operation is as follows. The divided parts intended to be reunited, muft, by the hands of an affiftant, be brought nearly into contact ; lea¬ ving juft as much fpace between the edges of the fore as to allow the furgeon to fee that the pins are carried to a pro¬ per depth. This being done, one of the pins muft be intro¬ duced through both fides of the wound, by entering it on one fide externally, pulhing it forwards and inwards to within a little of the bottom of the wound; and afterwards carrying it outwardly through the oppofite fide, to the fame Suture, diftance from the edge of the fore that it was made to enter r- at on the other. ^ ,, , . r The diftance at which the needle ought to enter from the edge of the fore muft be determined by the depth of the wound, and by the degree of retraftion produced in the divided parts* In general, however, it is a proper regular tion, in deep wounds, to carry the pms nearly to the lame diftance from the fide of the fore as they are made to pene¬ trate in depth: And whatever the deepnefs of the wound may be, the pins ought to pafs' within a very little oi its bottom : otherwife the parts which lie deep will run a nik of not being united ; a circumftance which muft always give rife to troublefome colle&ions of matter. The firft pin being paffed in this manner very near to one end of the fore, and the parts being Hill fupported by an afliftant, the furgeon, by means of a firm waxed ligature, paffed three or four times round and acrofs the pin, fo as nearly to deferibe the figure of 8, is to draw the parts through which it has paffed into immediate and clofe con- taft: and the thread being now fecured with a loofe knot, . another pin muft be introduced in the fame manner at a proper diftance from the former; and the thread with which the other was fixed being loofed, and in the fame manner carried round this pin, others muft be introduced at proper diftances along the whole courfe of the wound ; and the fame ligature ought to be of a lufficient length for fe- curing the whole. . 155 The number of pins to be ufed muft be determined ^n- tirely by the extent of the wound. Whenever this future pins to be is praftifed, a pin ought to be introduced very near eachufeJ, end of the wound, otherwife the extremities of the fore are apt to feparate fo as not to be afterwards eafily reunited. In large wounds, if the pins are introduced at the diftance of three quarters of an inch from one another, it will in ge¬ neral be found fufficient; but in cuts of fmaller extent a greater number of pins become neceffary in proportion to the dimen- fions of the fores. _ , ,r • , 1 Thus in a wound of an inch and half in length, three pins are abfolutely requifite ; one near to each end, and another in the middle of the fore: whereas five pins will always be found fully fufficient for a wound of three inches and a half in extent, allowing one to be within a quarter of an inch of each extremity of the wound, and the others to be placed along the courfe of the fore at the diftance of three quarters of an inch from one another. The pins being all introduced and fecured in the manner direfted, nothing remains to be done, but to apply a piece of lint wet with mucilage all along the courfe of the wound, with a view to exclude, as effectually as poffible, every ao* cefs to the external air. When the pins remain long, they generally do harm, by the unneceffary irritation and confequent letiattioa of parts with which they are always attended ; and if they are not continued for a fufficient length of time, that degree of ad- hefion is not produced between the divided parts which is neceffary for their future retention ; fo that the effedl of the operation comes to be in a great meafure, if not entire- ly, loft. In wounds of no great depth, for inftance of three quar¬ ters of an inch or fo, a fufficient degree of adhefion always takes place in the fpace of five days ; and fix,, or at moft fe- ven days, will generally be found fufficient for wounds of the greateft depth. But with refpeft to this circumftance, it muft always be underftood, that the patient’s ftate m health muft have a confiderable influence on the time necef¬ fary for producing adhefion. between divided parts. When the pins are withdrawn, the uniting bandage may pc Ligature Arteries 160 The tourni quet. Chap. X. S U R ofbe applied with threat advantage ; but as flips of leather ' fpread with ordinary glue, when applied to each fide of the ~ cicatrix, may, by means of ligatures properly connefted with them, be made to anfwer the purpofe more effe&ually, this mode of fupportifig the parts ought of courfe to be preferred. Sect. II. Of the Ligature of Art tries. When a furgeon is called immediately to a wound of any great artery of a limb, he fliould clap the point of his finger upon the wounded artery, or make his affiltant hold it; cut the wound fo far open as to fee the artery fairly ; draw it out if it be cut acrofs, and have fhrunk among the fiefh; or tie it like the artery of the arm in aneurifm by paffing ligatures under it. When? however, the wound happens in fuch fituations that we cannot command the blood, it is better to clofe the lips of the wound, and try to make them adhere by means of a very fteady comprefs and bandage. ] hus an aneurifm wrill form ; the operation for the cure of which fhall be afterwards defcribed. When accidents of this nature occur in any of the ex¬ tremities, and where preffure can be made with cafe on the fuperior part of the artery, we are poflefied of an inftru- ment which never fails to put a flop to all further lofs of blood: we mean the tourniquet. SeePlaleCCCCLXXXVII. fig x 6. "1 he tourniquet has undergone many improvements ; but the one here reprefented is confidered as the beft. By means of it the blood in any limb is very eafily and effe&ually commanded; and as it grafps the whole member equally, all the collateral branches, as well as the principal arteries, are equally comprefled by it. It has this material advan¬ tage too over every other inftrument of this kind, that, when properly applied, a fingle turn, or even half a turn, o| the fcrew, is fufficient for producing either a flow of blood, or for putting a total flop to it. The manner of ulmg it is as follows. , ir',e-t a pu^on °f three inches in length by one inch and halt in diameter be prepared of a linen roller, tolerably him, but not fo hard as to render preffure produced by it very painful. This being placed upon the courfe of the principal artery of the limb, is to be firmly fecured in that htuation by one or two turns of a circular roller, of the fame breadth with the cufln’on itfelf. i he inftrument, with the ilrap connedted with it, beinm now placed upon the limb, with the handle of the fcrew on the oppofite fide of the member to the cufhion upon the artery, the ftrap is to be carried round the limb diredly fideof theK iT’ V0 bC firmly COnneaed on the t oireth^ ^ tHU- con.neainK the ftrap and buckle together, particular attention is neceffary in doing ft wfth wfth a^m^h ’ 5° “ that thC fcreW may afterwards operate dee ee of P°ffibIe In Produang a fulcient degree of prefture. When proper attention is paid to tin’s orcumftance, a tingle turn of the fcrew proves fufficient for bu whenVicT T t0 the cilgulation of blood in the limb: oOhPe ter»KXmt V“y tightl embarrafiing i„ the 161 Manner of afing it. G E R Y. r2 5 But this method was found to give fo much pain, and in Ligature of fome cafes to be attended with fuch violent convulfions, Arteries- not only in the part chiefly affe&ed, but of the whole body, W’N that the beft pra&itioners have thought proper to reject it, and to tie up the blood-veflels by themfelves ; for ft is now well known that even very fmall arteries are poffefled of much firmnefs ; and that even in the largeft arteries a flight degree of compreflion is fufficient not only for reft raining hemorrhagy, but for fecuring the ligature on the very fpot to which it is firft applied. .In order to deleft the arteries to be tied, the tourniquet, with which they are fecured, muft be flackened a little by a turn or two of the fcrew ; and the moment the largeft artery of the fore is difeovered, the furgeon fixes his eye upon it, and immediately reftrains the blood again by means of the tourniquet. An affiftant now forms a noofe on the ligature to be made ufe of; and this noofe being put over the point of the tenaculum, Plate CCCCLXXXVII. fig. i 7. the operator puffies the fharp point of the inftrument through the fides of the veflel, and at the fame time pulls fo much of it out, over the furface of the furrounding parts, as he thinks is fufficient to be included in the knot which the affiftant is now to make upon the artery. In formin'r this ligature a fingle knot moderately drawn, and over it another fingle knot, is perfeftly iufficient. l6-. When from the deepnefs of a wound, or from any other With fhe caufe, fome particular artery cannot be properly fecured by crooked the tenaculum; in this cafe there is a neceffity of employ-needle* ing the crooked needle, and the following is the method of ufing ft. A needle of the ffiape reprefented PI. CCCCI.XXXVII. r m armed a %ature of a fize proportioned to it- u -nt0 the veflel .t0 be taken UP> Js to ke introduced at the dtftance of a fixth or eighth part of an inch from the artery, and pufhed to a depth fufficient for retaining ft, at the fame time that it is carried fully one half round the blood- vellel. It muft now be drawn out; and being again pufti- ed forward till it has completely encircled the mouth of the artery, it is then to be pulled out; and a knot to be tied of a fufficient firmnefs, as was already direfted when the tenaculum is ufed. Chap. XI. Of Aneurifms. The term Aneurifm was originally meant to fignifv aDefinifion. tumor formed by the dilatation of the coats of an arterv * but by modern praftitioners it is made to apply not onlv to tumors of tins kind, but to fuch as are formed by blood efrufed from arteries into the contiguous parts. There are three fpecies ; the true or eneyfted, the falfe or diffufed, ’ and the vancofe aneurifm. The true ox eneyfed aneurifm, when fit u^ted near theTheV-ue or TUi face or the body, produces a tumor at firft fmall ande,lc)rfted circumfcribed; the flein retains its natural appearance when preffed by the fingers, a pulfation is evidently diftin! guifhed ; and with very little force the contents of the fwtlung may be made to difappear; but they immediately return upon removing the preffure. By degrees the fwell- ing increaies, and becomes more prominent; but ftfil the patient does not complain of pain : on preffure the tumor continues of an equal foftnefs, and is compreffible. After his the fwelhng becomes large, the fl34 ■ ,S U ® Aiieurifms. blomly ferum occurs from the integuments ; and, d a real mortification do not take place, the fkm cracfcs m c luerent parts; and the artery being now deprived ot the ulualie- fiftance, the blood bujfb out with Inch force as to oceaiion the almoft immediate death of the patient. t has the dil- eafe terminates in the large cavities of the body ; but in the extremities we can, by means of the tourniquet, prevent the fudden termination of the difeate. When affe&ions of this kind happen m the larger ar¬ teries, the effects produced upon the neighbouring parts are often furpriiing : the foft parts not only yield to a great extent, but even the bones frequently undergo a great de- .. gree of derangement. . mv"1? 1 The falfe or diffufed aneurifm confifts m a wound or nip- Ifitfel ture in an artery,, producing, by the blood thrown out of aneurifm. it, a {welling in the contiguous parts.^ It is molt frequently produced by a wound made dire&ly into the artery. A The following is the ufunl progrefs of the ddcrder. A tumor, about the fize of a horfe-bean, generally rues at the orifice in the artery foon after the difcharge of the blood has been flopped by compreffion. At firft it is loft, has a flrong degree of pulfation, and yields a little to preflure, but cannot be made entirely to difeppear; for here the blood forming the tumor being at reft, begins to coagulate. If not improperly treated by much prtfture, it generally re- mains nearly of the fame iize for feveral wccks. ie ta largement however proceeds more rapidly m feme cafes than in others. In fiances have occurred of the blood being dit- fufed over the whole arm in the fpace of a few hours ; while, on the contrary, fwellings of this kind have been many months, nay even years, in arriving at any confiderable fize. # As the tumor becomes larger, it does not, like the true aneurifm, grow much more prominent, but rathei fpreads and diffufes itfelf into the furrounding parts. Ey degrees it acquires a firm confiitence ; and the pulfation, which was at ftrft confiderable, gradually duninifhes, till it is fometunes fcarccly perceptible. If the blood at firft thrown out pro¬ ceed from an artery deeply feated, the fkin preferves its na¬ tural appearance till the diforder is far advanced . but wnen the blood gets at firft into contatt with the flan, the parts become inftantly livid, indicating the approach of mortifica¬ tion ; and a real fphacelus has fometimes been induced. The tumor at firit produces little uneafinei's ; but as it in- creafes in fize, the patient complains of fevere pain, ftiff- nefs, numbnefs, and immobility of the whole joint; and thefe fymptoms continuing to augment, if the arteiy be large, and' affiftance not given, the teguments at laft burft, and death muil enfue. . . When an artery is punftured through a vein, as in blood¬ letting at the arm, the blood generally nifties into the yield¬ ing cellular fubftance, and there fpreads fo as to fhut the fides of the vein together. But in fotne inftances where the aitery happens to be in contaft with the vein, the communication opened has been preferved; and the vein not being fufficient y ftrongfor refilling the impulfeof the artery,mull confcquently be dilated. This is a varicofe aneurifm. It was firft accu¬ rately deferibed by Dr Blunter, and fmee that time has been frequently obferved by different praaitioners. Blere the iwell¬ ing is entirely confined to the veins. Soon alter the injury the vein immediately communicating with the artery begins to fvvell, and enlarge gradually. If there be any confiderabvc communications in the neighbourhood, the veins which form them are alfo enlarged. The tumor difappears upon pref- fure, the blood, contained in it being chiefly pinhed for- wards in its courfe towards Ure heart ; and w en t e tumor h large, there is a Angular tremulous motion, attended with 'V aricofe aneuxifin. E R y. Chap. XI. a perpetual biffing noife, as if air was paffing into it through Ancuri^. 5 Imatur^be applied upon the limb immediately below the (welling, tight enough to flop the pulie in the under part of the member, the fweUing difappeai-s by preffure, but returns immediately upon the preffure being removed. If, atter the fwelling is removed by preflure,^ the finger be placed upon the orifice in the aitery, the veins remain per- ft-aiy flaccid till the preffure is taken oft. If the trunk of the artery be eomprtfted above tfie orifice fo as ciicCtually to flop the circulation, the tremulous motion and hilling immediately ceafe ; and ft the veins be now emptied by pref. fare, they regain fo till the compreffioa upon the artery be removed. If the vein be comprtffed a hale above, as well as below the turfior, all the blood may generally, though not always, be pufhed through the orifice wnto the artery ; from whence it immediately returns on the piefure being difeontinued. j’t . When the difeafe has continued long, and the cnatation of the veins has become contiderable, the trunk o. the aitery above the orifice generally becomes greatly enlarged, whi e that below becomes propertionably tmall; of conlequence the pulie in the under part of the member is always more feeble than in the found limb of the oppohte fide. l68 The eaufes producing aneurifms, m general, are a natural CiufcS0{ difeafe of the arteries. Thus a partial debility of their coatsaueirnfm, may readilv produce the dileafe ; or they may ante, eipeaal- ly in the internal parts of the body, from great bodily exertions. They are likewife produced by wounds of the coats of the arteries, as now and then happens in blood¬ letting at the arm ; or from acrid matter contained m a neighbouring fore ; or from the deftrudion of furrounding parts, by which the natural fupport is removed. 169 Aneurifms have frequently been miftaken for aDfcef- Diagnii* fes and other collodions of matter, and have beea laid ooen by incifion ; on which account great attention is fome- times required to make the proper diftindion. In the commencement of tire difeafe the pulfation in the tumor is commonly fo ftrong, and other concomitant cir cum dances, fo evidently point out the nature of the diforder, that little or no doubt refpeding it can ever take place ; but in the more advanced ftages of the difeafe, when the fwellmg has become large and'has loft its pulfation, nothing but a mi¬ nute attention to the previous hiftory of the cafe can enable the pra&itioner to form a judgment of its nature. Aneurifms may be confounded with foft encyfted tumors, fcrophulous fwellings, and abfeeffes fttuated fo near to an artery as to be affe&ed by its puliation. But one fymptom, when conneded with ftrong puliation, may always lead to a certain determination that the fwelling is of the aneurilmal kind, viz. the contents of the tumor being made er.hly to difappear upon preft'ure, and their returning on the com- preftion being removed. The want of this circumilance, however, ought not to convince us that it is not of that nature ; for it frequently happens, efpecially in the advanced itages of aneurifms, that their contents become fo firm that no effed is produced upon them, by preflure. Hence the propriety, in doubtful cafes, of proceeding as if the difeale was clearly of the aneurifmal kind. _ r’0 . In the prognofis, three circumftances are chiefly to ut Prsg^ attended? to ; the manner in which the difeale appears to have been produced, the part of the body in which the fwellino is lituated, and the age and habit of the body of the patient. If an aneurifm has come forward in a gradual manner, without any apparent injury done to the part, and not fuc- ceeding any violent bodily exertion, there will be reaion to Chap. XT. S U R G Aneunln**. {uppofe that the dlfeafe depends upon a general cffefh’on either of the trunk in which it occurs, or of the whole arterious fyftem. In fuch cafes art can give little afiftance : whereas if the tumor has fucceeded an external accident, 171 an operation may be attended with fuccefs. An opera- in the varicofe aneunfm a more favourable prognofis may tion ft.uloniggpgrgHy ^ given than in either of the other two fpecies. It \arico(e a- does not proceed fo rapidly; when it has arrived at a certain neuaim. length, it does not afterwards acquire much additional fize; and it may be fuftained without much inconvenience for a great number of years. As long as .here is reafon to ex¬ pect this, the hazard which almolt always attends the opera¬ tion ought to be avoided. In the fecond volume of the London Medical Obferva- tions, two cafes are related by Dr Hunter of the varicofe aneurifm. One of them at that time was of 14 years fbinding, and the other had fubfifted for five years, without there being any neceffity for an operation. And in vol. iii. of the fame work a fimilar cafe of five years duration is related by Dr Cleghorn. In a letter afterwards from Dr Hunter to Mr Benjamin Bell, the Dodfor fays, “ The lady in whom I firft obferved the varicofe aneurifm is now living at Bath in good health, and the arm is in no fenfe worfe, although it is now 35 years fince ihe received the injury:” and the Doftor farther cbferves, that he never heard of the operation being per¬ formed for the varicofe aneurifm which was known to be fuch. Mr Bell fays, he was informed by Dr William Cleghorn of Dublin, that the cafe of varicofe aneurifm, related in the 3d volume of the London Medical Obfervations, remained nearly in the fame ftate as at the time that account of it was made out, which included a period of at leafl 20 years; only that the veins were rather more enlarged. The patient recovered, and the limb became nearly as flrong and fervice- afcle as the other. Mr Pott alfo met with three different infiances of this fpecies of aneurifm ; and obferves, that the operation never became neceffary in any of them. Among other inftances of vavicofe aneurifm which have appeared here, a young man from Paifley was examined feveral years ago by different furgeons of this place. The difeafe was very clearly marked, and no operation was ad- vifed. He was afterwards found ferving in the navy, where he underwent great fatigue without any incon¬ venience from the aneurifm, though then of 13 years Handing. But though this aneurifm, when it has arrived at a certain fize, commonly remains ftationary, and may be borne with¬ out much inconvenience for a long time, this is not always the cafe; for fome inftances have occurred, where the dif- eaie was attended with great uneafinefs, and where the ooe- xation was performed with much difficulty. In judging further of the probable event of aneurifms in general, the fituation of the tumor next requires atten¬ tion. When it is fo fituated that no ligature or effijAual compreffion can be applied for flopping the circulation in the part, if the artery be large, there would he the great- dt danger m opening it. In this cafe therefore the moll fatal coniequences are to be apprehended. When aneurifms are fituated near the upper parts of the extremities, furgeons have been hitherto doubtful whether, alter tying up the humeral or femoral arteries, the lower feverin'ther rmib-Vu0U d be fuPPlied with blood ; and tho’ been °J Ptrtor™Z that operation have publifhed, the fuccefs has been pretty trenerallv a- fenbe _tQ m fa! b h;nK of the g£t aneurifm M * l"! °Pei?tlon 'vas Performed, above the aneunim. Mr John Bell, however, in his late very inge- E R Y. 125 nious and important DJcourfes on Wounds^ has proved, to our Aneurifen fatisfaftion at leaft, that the inofculations which take placed —1 between the internal iliac and the arteries of the leg, by Difc J means of the glutseal arteries and the profunda femoris, are in every cafe fuflicient to fupply nourifhment to the limb ; that the fame is the cafe in the arm ; and that therefore in every aneurifm, even of the humeral or femoral artery, r.^ we ought to perform the operation. Several inftances ofKerra-k* fuccefs are there related ; among others, an operation per-able anea* formed by Mr J. Bell himfelf, which, as it is perhaps thei:1"m# greateft that has hitheito been performed, we ffiall here a- bridge for the gratification of our readers. A leech-catcher left as he was ftepping out ol a boat; and a pair of long- pointed feiffars pierced his hip exa&ly over the fciatic notch, where the great iliac artery comes out from the pelvis. The artery bled furioufly : the patient fainted. The furgeon eafily ftopt up the wound, as it was very narrow and deep, and healed it. A great tumor foon formed. The man * travelled from the north country in fix weeks to the Edin¬ burgh infirmary, with a prodigious tumor of the hip, the thigh rigidly contrafted, the ham bent, the whole leg fhrunk and cold and ufelefs. There was no pulfation nor retrocef- fion of blood on preffure ; but the diftenfion was attended with great pain, and the man was extremely anxious to have an operation performed. Though there was little doubt of its being aneurifm, it might be a great abfeefs. It was re- lolved therefore to make a fmall incilion, and juft touch the bag with the point of a lancet, and if it contained blood, a full confultation was to be called. Mr Bell accordingly- made an ineifion two inches and an half in length ; the great fafeia formed the coat of the tumor, and under it were feen the fibres of the great glutieus mufcle. As foon as it was opened at one point, great clots of blood came out; and Mr Bell, after being certain that it was an aneurifm of the great artery of the thigh, clefed up tke wound with a tent-like comprefs, put the patient to bed, and a pupil held his hand on the hip. This was done at one o’clock; at four the confultation met, and the operation was performed. On making an incifion eight inches long, the blood was thrown out with a whilhinr** noife, and with fuch impetuofity, that the affiftants were covered with it. in a moment twenty hands were about the tumor, and the bag was -filled with fponges and cloths of all fluids ; the blood, however, ftill made its way ; and the man who had fupported himfelf on his elbow, fell down ; his arms and head hung down, he uttered two or three heavy groans, and they thought him dead. At that critical moment Mr Bell ran the biftoury upwards and downwards, and at once made the wound two feet long ; thruft his hand to the bottom of the tumor, felt the warm jet of blood, put his finger on the mouth of the artery, the pulie of which he felt diftindly ; which flrft affured him that the man was alive.^ The artery was then tied ; and when Mr Bell lifted up his finger, it was difeovered to be the pofterior iliac ; that it had been cut fairly acrofs, and had bled with ocen mouth. The patient was fo low, that after dreifing the wound, they were obliged to biing in a bed, and leave him to fieep.ii) the operation roim. He was cured of this great wound in lels than feven months, and afterwards recovered the ufe of his leg completely. . In e.vejT cafe of aneurifm, the ufe of preffure has been EffcSof"' indiicriminately recommended, not only in the incipient pe-preffure in riod of the dileafe, but even in its more advanced ftages. antunfifis.-. . In the diffufed or falfe aneurifm, as preffure cannot be ap¬ plied to the artery alone, without at the fame time aftedting the refluent veins ; and as this, by producing an inertafed refiftance to the arterial pulfations, muft force an additional quantity of blood to the orifice in the artery—no advantage, 126 Aneurifm *74 the opera tion for aneurifm. is to be expeaed from it, though it may be produftive of In the early ftages of encyfted aneurifm, while the blood can be yet preffed entirely out of the fac into the artery, it often happens, by the ufe of a bandage of foft and fome- what elaftic materials, properly fitted to the part, that much may be done in preventing the fwelling from receiving any degree of rncreafe; and on fome occafions, by the continued fupport thus given to the weakened artery, complete cures have been at laft obtained. In all fuch cafes, therefore, particularly in every inftance of the varicofe aneurtfm, much advantage may be expected from moderate preffure. But preffure, even in eneyfted aneurifm, ought never to be- carried to any great length ; for tight bandages, by pro¬ ducing an immoderate degree of reaAion in the containing parts to which they are applied, inftead of anfwering the purpofe for which they were intended, have evidently the contrary effedf. Indeed the greateft length to which pref- fure in fuch cafes ought to go, fhould be to ferve as an eafy fupport to the parts affedkd, and no farther. Method of jn performing the operation for aneurifm, the firft ftep performingOUgjlt t0 ^ obtain a full command of the circulation in thp f the inferior part of the member by means of the tourniquet. This being done, the patient fhould be fo placed, that the difeafed limb, on being ftretched on a table, is found to be of a proper height for the furgeon ; who, as the operation is generally tedious, ought to be feated. The limb being properly fecured by an affiftant, the operator is now with the fcalpel, Plate CCCCLXXXVI1. fig. 18. to make an in- cifron through the {kin and cellular fubftance along the whole courfe of the tumor ; and as freedom in the remaining parts of the operation is here a matter of much importance, it is even of ufe to carry this external incifion half an inch or fo both above and below the fartheff extremities of the fwel- ling. All the effufed blood ought then to be wiped off by means of a fponge ; and the fofteft part of the tumor be¬ ing difeovered, an opening ought there to be made into it with the lancet, Plate CCCCLXXXVII. fig. 19. large enough for admitting a finger of the operator’s left-hand. This being done, and the finger introduced into the cavity of the tumor, it is now to be laid open from one extremity to the other, by running a blunt-pointed bittoury, Plate CCCCLXXXVII. fig. 20- along the finger from below up¬ wards, and afterwards from above downwards, fo as to lay the whole cavity fairly open. The cavity of the tumor being thus laid freely open, all the coagulated blood is to be taken out by the fingers of the operator, together with a number of tough membra¬ nous filaments commonly found here. The cavity of the tumor is now to be rendered quite dry, and free from the blood which, on the firft opening of the fwelling, is dif- charged into it from the veins in the inferior part of the member: the tourniquet is then to be flackened to difeover, not only the artery itfelf, but the opening into it, from whence the blood colle&ed in the tumor has been all along Method of difehanred. This being done, the next point to be deter- fecurmg mined is the manner of fecuring this opening into the ar- of^he^arte-^cry> as t0 Prevent future any farther effulion of blood. Various means have been propofed for accomplifhing this ; but the effe&s of all of them may be comprehended under the three following heads. 1. The effeas of ligature upon a large artery having on fome occafions proved fatal to the inferior part of the mem¬ ber, it was long ago ptopofed, that fo foon as the opening into the artery has been difeovered, inftead of applying a ligature round it, which for certain is to obliterate its ca- *75 176 By aftrin- gcnt«, ' Improper, I '*'•‘1 vity entirely, a piece of agaric, ritriol, alnra, or any other Aneurifnn aftringent fubftance, fiiould be applied to the orifice, in or- T-j der if poffible to produce a reunion ®f its fides.. 2. Upon the fame principle with the preceding, viz. that.Or by of ft ill preferving the circulation in the artery, it was feveral tures, years ago propofed by an eminent furgeon of Newcaftle, Mr Lambert, that the orifice in the artery fhould be fecured by means of the twilled future. A fmall needle being puffed through the edges of the wound, they are then diredted to be drawn together by a thread properly twilled round the needle, as was formerly direfted when treating of futures. Strong obje&ions, however, occur to both of thefe me- thods. In the firft place, no aftringent application with which we are acquainted is poffeffed of fuch powers as to deferve much confidence. In almoft every inftance in which they have been ufed, the hemorrhagy has recurred again and again, fo as to prove very diftreffmg, not only to the patient, but to the pradlitioner in attendance ; little or no attention is therefore to be paid to remedies of this kind in ordinary practice. Mr Lambert’s method of Hitching the orifice in the ar- tery is certainly a very ingenious propofal; and would in all probability, at lealt in moll inllancqs, prove an effe&ual Hop to all farther difeharge of blood : but as we have yet only one inftance of its fuccefs, little can be faid about it. Two material objections, however, feem to occur to this praClice. One is, that in the operation for the aneurifm, in almoft every inftance, a very few only excepted, the ar¬ tery lies at. the back-part of the tumor; fo that when all the c.olle&ed blood is removed, there is fuch a depth of wound, that it mull be always a very difficult matter, and on many occafxons quite impra&ieable, to perform this nice operation upon the artery with that attention and exaftnefs which, in order to enfure fuccefs, it certainly requires. But there is another very material objeftion. By introducing a needle through the fides of the orifice, and drawing thefe together by a ligature, the cavity of the artery muft undoubtedly be at that point much diminiffed. Indeed Mr Lambert, in his account of the cafe in which this operation was performed, acknowledges that the diameter of the artery was thereby diminilhed. Now the paffage of the blood being thus con¬ tracted at one point, the impulfe upon that particular part muft be very confiderable : So that the very remedy em¬ ployed for the cure of one fpecies of aneurifm, will in all probability prove a very powerful agent in inducing another; for the blood being thus obftruCled in its ufual courfe, there will be no fmall danger incurred of a dilatation being pro¬ duced immediately above this preternatural ftrifture. 3. Neither of the methods we have yet been confider- ing being found eligible for fecuring the orifice in the ar¬ tery, we fhall now proceed to deferibe the ordinary manner of performing this operation ; which confifts in obliterating the arterial cavity entirely by means of ligatures. ^ The artery being laid bare in the manner direCled, and all the coagulated blood being carefully removed from the ca-doingi;'! vity of the tumor, on the tourniquet being now fiackenedlig31^' fo as to bring the orifice in the artery imo view', a fmall probe curved at the extremity is to be introduced at the opening, in order to raife the artery from the neighbouring parts, fo as that the furgeon may be enabled with certainty to pafs a ligature round it, without comprehending the con¬ tiguous nerves, which iu general run very near to the large blood-veflels of a limb. By this precaution the nerves may be always avoided; and by doing fo, a great deal of mil- chief may be prevented, which otherwife might fupervene. When the diforder is lituated either in the ham, or in the ufual part of blood-letting in the arm, bending the joints of 2t Chap. 180 Subfequent treatment of the pa¬ tient. ,.xr. s u r Areurifrm. the hnee or of the elbow, as it relaxes the artery a little, ; renders this part of the operation more cafily effe&ed than when the limbs are kept fully ftretched out. The artery being thus gently feparated from the conti¬ guous parts, a firm waxed ligature muft be paffed round it, about the eighth part of an inch or fo above the orifice, and another muft in the fame manner be introduced at the fame diftance below it. The ligatures being both finiihcd in the manner dire&ed, the tourniquet is now to be made quite loofe ; and if no blood is difeharged at the orifice in the artery, we may then reft fatisfied that the operation is fo far properly com¬ pleted. 1 he wound is now to be lightly covered with foft lint, with a pledgit ot any emollient ointment over the whole ; and a comprefs of linen being applied over the dreffings, all the bandage in any degree requilite is two or three turns of a roller above and as many below the centre of the wound, making it prefs with no more tightnefs than is ab- folutely necefiary for retaining the application we have juft now mentioned. 1 he patient being now put into bed, the member firould be laid in a relaxed pofture upon a pillow, and ought to be fo placed as to create the ieaft poffible uneafinefs from the poilure in which it is laid. As the operation for the aneurifm is always tedious, and produces much pain and irritation, a full dole of laudanum fhould be given immediately on the patient being got into bed. In order to dimimfh fenlibility during fome of the more capital operations, different trials have been made of opiates given an hour or fo before th*e operation. On fome occafions this proved evidently very ufeful; but in others it feemed to have the contrary effect; particularly in weak nervous conllitutions, in which with any dofes, how¬ ever fmall, they appeared to be rendered more irritable and more fufceptible of pain, than if no opiate had been giveri. Immediately after this operation, however, an opiate ought to be exhibited, to be repeated occalionally accordino- to the degrees of pain and reftleffnefs. In fome few cafes of aneurifm, it has happened that the pulfe in the under part of the member has been difeovered immediate!} alter the operation. This, however, is a very rare occurrence : For as this diforder is feldom met with m any other part than at the joint of the elbow as a confe- quence of blood-letting, and as it rarely happens that the brachial artery divides till it paffes an inch or two below that place, the trunk of this artery is therefore moft fre¬ quently wounded ; and when, accordingly, the ligature, in this operation, is made to obliterate the paffage of almoft the whole blood which went to the under part of the arm, there cannot be the leaft reafon to expeft any pulfation at the wmt, tul m a gradual manner the anaftomofmg branches o the artery have become fo much enlarged as to tranfmit fuch a quantity or Wood to the inferior part of the member of theanery.1 ^ ** * ftimuIu'3 tC the larSer branches an um?r^iately the 0Perat!on’ the P^'ent complains of an unufua! numbnefs or want of feeling in the whole mem- • ic th r aS • *fneral for a few hours, becomes cold, it foft flan^r ^ t0 ieep k Foperly covered with warm carts M 5 anjm rV° W 38 a Semle ^ulus to the Lcl bJtW’ Tn°dtrate (nA,on? aPP«r to be of ufe. In the he nulwf uW ' °Ur8 fr°m the 0Perati°n> although he numbnefs ftill continues, the heat of the parts generally of a fLVu11™ 5 30(1 u fre^lientIy haPpens, in the courfe hours more, that all the inferior part of the ber becomes even preternatural!,- warm. P mmobaul)- alter tbis operation, the want of feeling 18 iSi ditafe of the pjmb after j ic opera- i on. mem- G E R Y. T27 the parts is often very great; and in proportion as the cir- Aneurifm?. culation in the under part of the member becomes more con-—v-—-^ fiderable, the degree of feeling alfo augments. If we could fuppofe the nerves of the parts below to be always included in the ligature with the artery, that numbnefs which fuc- ceeds immediately to the operation might be eafily ac¬ counted for; but it has been alfo known to happen when nothing but the artery was fecured by the ligature. In the mean time, the patient being properly attended to as to regimen, by giving him cordials and nourilhing diet when low and reduced, and .confining him to a low- diet if his conftitution is plethoric, the limb being ftill kept in an eafy relaxed pofture, towards the end of the fourth or fifth day, fometimes much foener, a very weak feeble pulfe ' is difeovered in the under part of the member, which beco¬ ming ftrongcr in a gradual manner, the patient in the fame proportion recovers the ufe and feeling of the parts. So foon as there is an appearance of matter having form¬ ed freely about the fore, which will feldom happen before the fifth or fixth day, an emollient poultice Ihould be ap¬ plied over it for a lew hours, in order to foften the dreffings, which may be then removed. At this time the ligatures might be taken away ; but as their continuance for a day or two longer can do no harm, it is better to allow them to remain till the iecond or third dreffing, when they either drop off themfelves, or may be taken away with perfeft fafety. The dreffings, which ffiould always be of the foft- eft materials, being renewed every fecond or third day ac¬ cording to the quantity of matter produced, the fore is in general iound to heal very eafily ; and although the patient may for a confiderable time complain of great numbnefs and want of ftrength in the whole courfe of the difeafed limb, yet in moft inftances a very free ufe of it is at laft obtain, ed. Very often after the artery feems to be fecured it gives Hemo?rh». way, and fatal hemorrhagies enfue ; nor is the patient freezes often • from this danger for a great length of time. In one of Mr h*cceed the Hunter’s operations the artery gave way on the 26th day. 0Peratioa’ It is to this difficulty of procuring adheiion between the lides of the artery that a great part of the danger of this operation is to be aferibed. Chap. XII. Of Ajfeftions of the Brain from Exter¬ nal Violence- When the bram is compreffed, a fet of fymptoms enfueSyngtom! m extremely dangerous, though fometimes they do not make of tr.cir appearance till after a confiderable interval. But at^on whatever time they appear, they are uniformly of the famebl'airK kind, and are in general as follow: drowfinefs, giddinefs, and itupefadion, dimnefs of fight, dilatation of the pupil - and, where the injury done to the head is(great, there is commonly a difeharge of blood from the eyes, nofe, and ears. Sometimes the Tradtured bone can be difeovered through the integuments, at others it cannot. There is an irregular and oppreffed pulfe, and fr.oring or apople&ie fter- tor m breathing. There is likewife naufea and vomiting with an involuntary difeharge of faeces and urine. Among the mufcles of the extremities and other parts, there is loft of voluntary motion, convulfive tremors in fome parts of the body, and palfy in others, especially in that fide of the bo¬ dy which is oppofite to the injured part of the head. . Some cf the milder of thefe fymptoms, as vertigo, ftupefac- tion and a temporary iofs of fenfibility, are frequently indu- eed by flight blows upon the head, but commonly foon difap. pear, either by reft alone, or by the means to be afterward* pointed out. But when any other fymptoms enfue, fuch as d'* Jatatiyn of the pupils, and efpecially when much blood i« di£- graft . FraSure 4I^arwcl from the eyes, note, and ears,, and that there is and0epr the fiiull is injured over a future, and it is not Fra& re ufe the trepan, a perforation ought to aun. opera- .. 10 a luturr, Hiru il is hut: thought advifable to ufe the trepan, a perforation ought to^f be made on each fide of the future, efpecially in young fub' Ciamum^ jetts, in whom the dura mater adheres more ftrongly than &c * in adults ; becaufe there cannot be a free communication Vl~~~v~ between the one fide and the other, on account of the at¬ tachment of that membrane to the future. After the elevation of the depreffed pieces, or the remo-Treatment val of thofe which are quite loofe, the extra&ion of extra-of the p*. neous bodies, and the evacuation of extravafated fluids, &c.tient; after the fore.is to be dreffed in the lighteft and eafieft manner ithe all that is neceffary being to apply a pledget of fine feraped lint, covered with fimple ointment, to that part of the dura mater which is laid bare by the trepan, or otherwife; after which the edges of the fcalp are to be brought together or nearly fo, and another pledget laid along the whole courfe of the wound ; a piece of fine foft linen is to be laid over all, and the dreffings may be retained in their place by a com¬ mon night-cap applied clofe to the head, and properly fixed. i r s 1 he patient is to be placed in as eafy a pofition in bed as pofiible, with his head and fhoulders elevated a little more than ordinary. If the operation be attended with fuc- cautions ^ than ^ °PeratI'0n be tended with fue¬ ls performed noon a part of the fb„ll WL y • r operation cefs, the patient will foon begin to {how favourable fymp- thicknefs, efpSy ate 1 p^eVrS [17^ C"S fepilbility/an^ ploe. And though it be laid by wi iters in i Aral that the 1 hT. g fymI>tonls W,.U gradually d.iappear. After this sir-=i-:“ “S:»rastt* r iSJams-SliOTiri: # v luiiics at me aipioe (which is generally known by the appearance of blood), yet the operator fhould be upon his guard in this point, ex¬ amining from time to time if the piece be loofe, left thro’ inadvertence the dura mater be wounded ; for in fome parts o. the {] 190 In concuffion the pulfe will frequently fink and become Treatment, feeble, even after the difeharge of eight or ten ounces of blood: In doubtful cafes, therefore, blood-letting ffiould be pradifed with great caution. If the pulfe become.fuller and ftronger after difcharging a moderate quantity, if the blood appear fizy, and efpecially it the patient become more ftnlible, it may be concluded that the fymptom* denend uoon extravafation, depreffion of the fkull, or iome degree of inflammation ; and as long as advantage leems to be derived from blood-letting, we may repeat it : but if, upon drawing a few ounces of blood, the pulfe become* feeble, and efpecially if along with tms the patient become more weakly, we fliould immediately delift from any farther evacuation of blood; and in place of it we ought to give inch remedies as may fupport and ftrengthen the patient: cordials ought to be given internally,and ftimulants applied externally. Warm wine fliould be given in proportion to the degree of debility induced ; the patient, who is apt, in this cafe, to become cold, Ihould be kept warm by proper coverings ; a bhfter ought to be put to all that part ot the head in which the !kin has not been injured ; iinapis fliould be applied to the feet ; gentle laxatives are ufetul, and fliould be regularly given, fo as to keep the body open. If the patient cannot fwallow wine in fufficient quan¬ tity, volatile alkali, ardent fpirits, and other cordials of a It 1 mplating kind, fliould be given. In concuffions of the brain, Mr Bromefield has recommended the ufe of opiates, and feveral other practitioners agree with him; though iome confider it as hurtful in the early ftages of the dilorder, and are of opinion that even wine and other cordials ought to be given with fome degree of caution. Iflues, or the fre¬ quent repetition of blillers to the different parts of the bead and neck, by which an almoft conftant ftimulus is preier- ved, are much recommended. When patients are re¬ covering from accidents of this kind, a lioeral uie ot bark, fled, and mineral waters, &c. have iometimes been of ter- vice. When the Itomach is loaded, gentle vomits become neceffary; and white vitriol is reckoned the beft in inch cafes When much languor, inactivity, and lois of me¬ mory continue, eleCtricity long applied has been attended with advantage. This remedy, however, would be hurt¬ ful where any fymptoms of compreffion or inflammation of the brain are prefent. Sect. III. Of Inflammation of the Membranes of the Brainy or of the Brain itfelf , from external Violence. Inflammation of the brain and of its membranes is at- tended with fymptoms which occur in inflammations at-ofiiiS1®; feCling other parts of the body, and from fimilar caufea, and likewue with fymptoms peculiar to the brain itfelf. This dilorder differs effentially from concuffion in its not appear- ing immediately; fddom till feveral days after the accident, and fometimes not till two, three, or more wreeks, or even as many months, have, elapfed; when the patient begins to feel an univerfal uneafinefs over his head, attended with lilt- leffnefs, fome degree of pain in the part upon which the injury was inflicted, though of this there was perhaps no previous fenfation. Thefe fymptons gradually increale;. the patient appears dull and ftupid ; there is now a lenia* tion of fulnefs, as if the brain were girt or comprefled; he complains of giddinefs and of naufea, which fometimes ter¬ minate in vomiting; he is hot, and extremely uneafy; 1‘1S fleep Chap. 4.XII. S U R Inflamma- deep la much dirturbed, neither natural fleep nor that pro- BraniD f&ce curetl ^ °P,ates affordl,11g him relief; the pulfe is hard t t’- and quick ; the face is. flufhed ; the eyes inflamed, and un¬ able to bear an expofure to much light- Sometimes, where a wound of the head accompanies thefe fymptoms, its edges become hard and fwelled, and an eryfipelatous inflamma¬ tion fpreads quickly over the whole head, and especially to¬ wards the forehead and eyelids, which frequently fwell to fuch a degree as to fhut up the eyes entirely. This fwell- ing is foit and painful to the touch ; it receives the im- preffion of the finger, and frequently originates merely from the external wound ; on which account the attending fymp¬ toms are commonly eafily removed by the means belt fuited to eryiipelas of the parts. In a few inftances, however, this fymptom is hkewife connefted with, and feems to ori¬ ginate hom, lome alfedtion of the dura mater. Its ten¬ dency is then of the moft dangerous kind, and therefore requires the greatefl; attention. Soon after thefe fymptoms become formidable, the part which received the blow be¬ gins to out on a difeafed appearance. If the bone has been expo fed by the accident, it now lofes ics natural complexion, becomes pale, white, and dry, either over its whole furtace or in particular fpots: but when the bone has not been denuded, nor the fofter parts divided, but merely contuied,. they now fwell, become puffy, and painful to 'the touch ; and when the head is fhaved, the fkin over the part affected is redder than the reft of the Icalp ; and if the fwelled part be laid open, the pericranium will probably be found to be detached from the Ikull, and a little bloody fetid ichor wift be obferved between this membrane and the bone, which will be found ddcoloured in nearly the fame manner as it it had been laid bare from the beginning. Ly the application of proper remedies thefe fymptoms are frequently entirely removed ; but when negle&ed, or when they uo not yield to the means employed, they con- ifantly become worfe. Delirium enfues ; the patient be¬ comes extremeiy hot; and is at times feized with flight'fhi- verings, which continue to iucreafe and are attended with feme degree of coma or ft upon The former fymptoms now in a great meafure difappear ; palfy of one fide is foon followed by deep coma ; the pupils are dilated ; the urine and fames a, epafled involuntarily ; fubfultus tendinum and other con- vunions enfue ; and death certainly follows, if the patient be not fpeedily relieved. r Of the above fymptoms, the firft fet point out the inflam¬ matory, the other the fuppurative, ftage of the difeafe. The remedies which are ufeful in the one are highly improper in tne other. During the inflammatory ftage, blood-lettiim is ie principal remedy; but this is improper after the fup- puranye fymptoms appear, for then the trepan is the only thm r that can give relief. ' Method °f The indications of cure are; i. To employ the moft e. efteftudl means for preventing inflammation. 2. To en deavour to procure the relolution of inflammation by ge- cannot be “P":aJ 3'When ,he Sen olac ™° U,,°n’ ^ whe,, f'-PP-atlon baa Iffi u glVe! 3 free vent to the matter. 4. If the afteded parts be attacked with gangrene, to endeavour to re! T93 mo\e it and obviate its efft&s. Blood-let- To anfwer the firft indication wbon ^ ^ to lx employed, and to a confide,able extent; the bot^ls y ght to be kept open by the ute of laxatives • a waterv 8 their proper application, and if inflamnia- sure. G E R Y. ,,, tion have adually cbmmenced, the fecond indication ought fnflimma- then to be attended to. For this purpofe, blood-letting, t,,in/ i fhe not from the feet according to the advice of old pra&i- ,Lrai”’ &c‘, tioners, but as near as poflible to the part affeded, is to be performed, by leeching, cupping, or fcarifying with a lan¬ cet or Icalpel. When, inftead of this, general blood-letting is thought more advifable, it is commonly reckoned belt to open the external jugular vein, or the temporal artery ; and the rule, with regard to the quantity to be evacuated, ought to be, to draw blood as long as the pulfe continues firm ; fo that, in violent.cafes, taking away from 20 to 2J ounces at once will be found to anfvver the purpofe better than to extrad even a larger quantity, but at different intervals. A few hours afterwards, if the fymptoms continue violent, it may be proper to dilcharge an additional quantity ; but this muft depend upon the ftrength of the patient and the ful- nefs of the pulfe. Along with the liberal ufe of blood-letting, brifle pur-And purga. gatives fliould be given. The bowels fhould not merely bedves. kept open ; but in order to receive full advantage from the practice, a Imart purging fhould be kept up by repeated dofes of calomel, jalap, or fome other neutral fait. Where the patient cannot fwallow in fufficient quantity, llimulating injeChons fhould be frequently exhibited. A moiit Hate of the fkin is ufeful in every cafe of in¬ flammation, and ought therefore to be here particularly at¬ tended to - In generala mild perlpiration may be induced by applying warm fomentations to the feet and legs, and by laying the patient in blankets inftead of linen. But when thefe means are infufficient, diaphoretics or evenfudo- nfics may be given. When much pain or reftleffnefs takes place, opiates ihould be admimitered freely, which are now found to be at¬ tended with real advantage. With refpedt to the external treatment of this diforder,Fxter9n5al atten ,on fliould be paid to thole means which may meftrteatnL it. readily induce a free diicharge of purulent matter from the j at the injury. With this view, if the original acci- cent be attended with a wound or divifion of the integu¬ ments, as the lips of the fore are commonly obferved to be hard, painful, and dry, it ihould be covered with pledgets ipread with an emollient .ointment, and warm emollient pomtices hud over the whole ; by which means, and efpeci- aily by a frequent renewal of the poultices, a free difeharge of matter will commonly be induced, and the bad fymp- tr3edWlH generally be much mitigated, or entirely re- In cafes unattended with a divifion of the integuments as foon as it is fulpefted that bad fymptoms ma/fupervene the tumor fliould be divided down to the pericranium ; and 1 t iat membrane be found feparated from the bone, it ought hkewife to be divided ; and by inducing a fuppura- tion m the way already mentioned, the inflammatory fymp- toms will probably be removed. As matter formed here is commonly of an acrid nature, and therefore apt to affeft the bone, and by communication of veffels the membranes under it, inftead of wafting time till fluctuation be diftindtly perceived, a free incilion fhould be made as foon as a tu mor is obfervable. But this would be extremely improper m the tieatment of tumors which immediately fucceed^o external mjunes ; for it orten happens that fuch tumors dif¬ appear fpontaneoufly, or by the ufe of aftringent applica- tions. It is only when a tumor-attended with pain ap- pears at a diftant period upon the fpQt where the injuJy was nxewed, that it ought to be opened as foon as per. The next part of the praftice regards the remedies to be R 2 . ufed pura‘i<'n his taken place. S U R ured when the dirorder has either proceeded to fuppura- tn of he "ion, or when, on a removal ot a portion of the cranmm. Brain, the dara mater is ohferved to be floughy with a tendency '—-pr-— tQ gangrene ; and this includes the third and fourth inaica- wSlp- ^Th0/h.pP««!« °f Ac^e " k"0"'nb>-,the inflammatory fymptoms, mftead of yielding to the remedies already advifed, increafing m violence ; and being fucceed ,d by coma, dilatation of the pupils, a flow and full P«lfe, in¬ voluntary- discharge of faeces and urine, pally, and inegu- Lr convllfive rr.ottons, and efpecally when thefc fymptoms are fucceeded by fits rigor and flnvenng. The exiftence of matter within the cranium beins aker- tained as ro other remedy can be depended upon tor re- jnovlntr it, the operation of the trepan fhonld be immedt- aiely employed, and as many perforations ought to be made as may be tufficient for evacuating the matter. But it, a.ter the (hull is perforated, little or no matter appear between the bone and membranes ; if the dura mater teem more tenfe than ufual; this membrane is liltewife to be opened, lo a. -o give a free dilcharge to any matter which may be between the brain and its membranes. , , , . When it is perceived that the dura mater has already be- come flou-hy, with fome tendency to gangrene, the great- S dan-eAs to be dreaded. If mortification has commen¬ ced there will be much reafon to think that death will Zon follow ; but different inftances have occurred ot floughs for min«■ upon the dura mater, and of cut es being made a- er thele have feparated. All that can be attempted is to keep the fores clean, to give a free difeharge to the matter to apply nothing but light eaiy dreffings, and to give bark Tn as^great qualities as" the ftomach can bear I- there be ftill fome tendency to inflammation, the diet fliomd be kn “d coohn “ he patient fhonld drink freely of whey or other diluent liquors, and the bowels ihould be kept moderate )' open: But if, on the contrary, the fyftem be low and the pulfe feeble, wine is the moil effeaual cordial. Sect. IV. Of Ffares, orJitnp/e FraSures of the Skua, The term is here meant to imply a mere divifion of one or both the tables of the flcuU, with or without a wound of the integuments, not attended with depreffion. ( of this kind ate not dangerous as far as affects the Ikull on¬ ly, for it frequently happens that extenfive hffures heal without producing bad iymptoms. But as they are fre- ouently attended with effufions of blood or ferum upon the brain or its membranes, or as they may tend to excite m- Jflammhtion in thefe, they require particular attention. When effufions occur, fymptoms of comprdfion imme¬ diately follow. The remedies heft fmted to this diieafe muff then be applied; and the trepan is alone to b de- pended upon. The fiffures (hould be traced through their whole extent, and a perforation made on the nao * ing part of each of them, if tlus be unfuccefsful, the ope ranoii ihould be repeated along the courfe of the tiffures as long as fymptoms of a compreffed brain continue; and a* theSeffufed matter will commonly be found contiguous to the fiffures, they ought to be included m each perforate . xa 'h7J f If the fiffurJbe fo large as to produce an obvious fepa- JS^Xmdonofthe two fides of the bo^ the suture of Ac cak filTures. wiH be at once rendered evident; bu w iTfmSl, there is difficulty in diitinguiflung i from tne na- turaTfutures, or from futures funounding fmall bones, which fometimes occur, and get the name ot # mav be known by the firmer adhefion which always exnts Seen the perkranhun and futures; whcreaB thrs meo- brane is always fomewhat feparated from that part t e fcooe where a fiffure is formed. When the pericranium 19 G E R Y. _ Chap, xm, r bv the accident for a confiderable way from the Wounds nf S of bone, various means have been contriveifor^j, dffcovering the nature of the cafe ; as pouring ink upon the part fufnecled to be fraAured, which in cafe of a traftare cannot be wiped entirely off; or making the patient hold a hair or piece of catgut between his teeth, while the other extremity of it is-drawn tenfe, which, when ftruck, ^ laid to produce a difagreeable fenfation in the sractared part. But iuch tefts are little to be depended on ; ink will pene- irate the futures ; and the others are ‘neffeaual, unleis the fradture be extenlive, and the pieees confiderabl) feparated from each other. The oozing of the blood from a fiffure better mark. The afeertaming of this point, how- ever, aopearsnot viry material; for unlefa alarming.fymptoni, are prefent, although there ihould be a fiflure, no op- deration is r.ecelfary; and i: fuch fymptoms occur, the bone ought to be perforated whether there be a h.Ttire “whin a 6 dure is not attended with fymotoms of a com- preffed brain, the trepan ought not to be applied,. opeci- ally as the operation itfelf tends in fome degree to mereafe inflammation of the part. The hflure fhould be treated merely as a caufc which may induce inflammation. . i e patient fhould be blooded according to his ffrength , the bowels Ihould be kept lax, and the fore treated with miU eaty dreffing ; and violent exertion fliould he avoided as long as there is any danger of inflammation occurring. Chap. XIII. Difeafes of the Eyes. Sect. I. Of Wounds of the Eyelids and Eyeball 19I In cafes of fuperficial wounds of the eyelids, it will be Treat- fufficient to bring the edges of the wounds together and.(.» retain them in their place by flips ofadhetive pla.ter. . when a wound is deep, particularly when the tarsus is dt- vided, it will be neceffary to employ either the interrupted ■ or the twilled future, care being taken that the luturcs be not carried through the inner membrane ot the eyelid otherwife the eye would be irritated and inflamed. Alter fuch an operation, the motion of both eyelids fhou . e pre- | vented as much as poffible, elfe no union ot the divided part^ can be obtained. Alter the futures are nmfiied, the eye¬ lids ihouldbe clofed and covered with a pledget of emoUient ointment, and over this {hould be laid a cornpreis pf foft lint, and one of a flmilar nature ought hkew.ie to cover t - found eye ; then a napkin {hould be made to piefs equal y on both eyes, and be properly fixed. Infiammat.on fhouhi be guarded againft, or, if already prefent it muff be remo¬ ved in the manner direfted under the article (lee Medicine.) The futures may be removed in about three days from their introduaion, when the parts will commonly be found reunited. , , A , _ When a portion of the eyelids is fo much deffroyed, perhaps fo completely removed, as to prevent the rJraainl"? Arts from being brought together, without obftruaing the motion of the eye, the belt method will be to treat them with light eafy dreffings, truiling to nature for fupplying thCIf thrcorlea be wounded, k will commonly be attended Of with partial or total blindnefs. If any of the other par. ^ of the ball be wounded, the danger wiU generally be m pro¬ portion to the extent of the wound. The principal atten¬ tion ought to be direfted to tlie prevention or removal ot inflammation. When pain occum, it ought to be removed by opiates; and with thefc a ftria antiphlogubc courfe is When the wound is large, and the humours 3 • =1 Chap.XTlI. S U R Difeafes of evacuated, blindnefs, with finking of the eyeball, will almoft the Eye ids alwayS fee the confequence ; but in wounds of a fmall ex- tent, by proper treatment, a cure may be made and the light preserved. Sect. II. Of Dtfeajes of the Eyelids. too Tumors of The eyelids are fubjedt to be infefted with tumors of dif- the eyelids, ferent kinds, which frequently require the aflillance of for¬ gery. The firll of thefe is the hordeolum or Itye, which frequently grows on the edge of the eyelid, and is attended with heat, ftiffnefs, and pain; and unlefs proper means be taken to prevent it, a fuppuration is frequently the confe¬ quence. It may be confidered as a common abfeefs feated in an obftrufted febaceous duel or gland. It may gene¬ rally be removed by difeutient applications. Should thefe prove ineffectual, it ought to be brought to fuppurate by a irnall emollient poultice, when it will commonly heal of it- feif; but if it do not, it may be opened with the point of a lancet, that the matter may be difeharged ; and the part may be anointed afterwards with faturnine folution. j The eyelids are fubjett to encyiled tumors, fteatoms, warts, &c. which are to be treated like the fame tumors ; when feated in other parts of the body ; only in extirpa¬ ting thefe tumors, fliould part of the eyelid be removed en¬ tirely, no dreflings can be applied, as, however mild they may be, they would irritate and inflame the ball of the eye. All that can be done therefore, in luch cafes, is to lay the lips of the fore as nearly together as poflible, and frequently to aoi remove any matter that may form on it. nveiiion of 'ihe eyelafhes are fometimes fo much inverted as to rub uPon eye and create much pain and inflammation. Vari- ^ ous caufes are afligned for this, inch as the hairs themfelves taking a wrong diretlion ; rnverlion of the tarfus or carti¬ lage of the eyelid; fome cicatrix formed upon the fltin of this part after wounds or abfeefles ; tumors prefling the j hairs in upon the eye ; and, finally, a relaxation of the exter¬ nal integuments. 1 he treatment of this drforder muff depend much upon a > knowledge of the caule. When it is owing to a derange¬ ment of the cilia themfelves, if they have remained long in this ftate,. it will be extremely difficult to make them re¬ ft* cov6r their proper dire61 ion. They ought therefore to be !«■ pulled out by a pair of forceps, and the part waffied with fome aftringent lotion ; and if the new hairs appear to take a fimilar direction, which is very apt to happen, as foon as they are long enough they ought to be turned back upon i the eyelid, and kept there for feveral days, or even weeks, sii by ad he five plailer. When the difeaie ptoceeds from a '■ contraction of the orbicular mufcles, the contracted part [lit may be cut from the inner furface of the eyelid ; in irtf which place a cut commonly foon heals. If the caufe pro- ulf cecd from a tumor or cicatrix, this muft be removed before a cure can be expefted; or if it be owing to relaxation of i11 the fltin, the parts ought to be bathed with fome ftrono1 lii! aftringent. If this fail, the relaxed fltin fhould be removed^ ,1, and the part healed by the firft intention. Sometimes the K, ■ Cilia of the upper eyelid are turned in on account of drop- ifi f1Cid ^welling in that place. When this happens, the water is to be evacuated by a few punctures with a lancet; but iii ^h(:n fuc]l means fail, and when the difeafe is quite local. If; V1f10n be difturbed, a fufficient part of the fltin ought to r) ^moved with a fcalpel, and a cure made by adhefive aoi platter or the twifted future. tlf’ Gr- lJbe gaPing eye takes place to any great degree, it (J rningoutr tten^ed not only with much deformity and uneafinefs,' u'the eye- trom a iarge potion of the lining of the eyelid beW turned is. outwards, but hkewife from too much of the eye being expoiea. The diforder may arife from an enlargement of G E R Y. ,33 the eyeball, from dropfical fwelling, or from the cicatrix Difeafes of of an old wound or abfeefs ; hence it is frequently produced the Eyelids^ by the fmall-pox, burns, or fcrophula ; but more frequently v *■ by a laxity' of tiie part in old age. VV hen the dilordcr is induced by an enlargement of the ball ol the eye, nothing but a removal ot this fwelling can be effedtual. If from dropfical fwelling, when this is con¬ nected with general anafarca, the affedtion of the fyftem mult firlt be cured ; but if it appear to be local, nothing anfvveis fo well as punCtures. When it arifes from a cica¬ trix, the fleui Ihouki be divided, and the effects of inflam¬ mation guarded a-;ainlt. If it be owing to inflammation, the antipnlogiftic courfe mull be uled ; when it ariles from old age, the eyes ought to be daily bathed with cold water, or lome aftringent and ftimulant folution. Concretion of the eyelids fometimes ariles from a high de- Concfiftio® giee of ophthalmia; in which caie the eyelids are not only of the eye*- connected by their edges to each other, but now and theniids* g;ow to the iurface of the eyeball. A cohefion is fometimes obierved alio in children at birth. When the adhelion is flight, it may in general be removed by the end of a blunt piobe ; but when it is co-nfiderable, a cure can only be effected by a cautious difleCtion. If the eyelids on one fide be found, they will ferve as a guide to direct the inci- lion. Ihe i.arfi are carerully to be divided from each other;- after which, it there be no other adheiions, the eyelids- may be readily opened r But if they adhere to the eye, the operator is gently to pull and feparate the eyelids, while the patient, is defired to move the eye in the oppofite di¬ rection. When this is effected, nothing is further neceflary than to drop a little oil upon the eye, and cover the eye* lias with loft lint fpread with lome cooling emollient oint* meat. Ihe oil and ointment are frequently to be repeat¬ ed, and every precaution taken to prevent inflammation and*, irritation. Sect. III. Of Specks, Films, or Excrefcences on the Eye. Specks are fometimes formed upon the white part ofOffpeck* the eye, but more frequently upon the cornea. In theon the cor®- fonner cafe they are feldom attended with much inconveni-nea' enee, but in the latter they are often the caufe of partial' or total bliudnefs. T hey are almoft univerfally the confe¬ quence of inflammation, and feldom go much deeper than’ the tunica adnata. Two very different ftates of the dif- orcier occur ; the one from an effufion immediately under the outer layer of the cornea, and in this cafe the cornea does not appear to be railed; the other takes place from one or more little ulcers, which breaking, leave as many opaque Pot0 in ^be centre, wnich are more elevated than the reft; of the cornea.: and the ineonvenience attending either fitua- tion muft always be in proportion to their extent and degree ot opacity, or their vicinity to the pupil. When- vifzon is little affected by them, they need fcarcely be con- fidered as an object ot iurgery ; but whenever vifion is ma¬ terially^ impaired, remedies become neceffary, and thefe- fhouid be inch as are belt fluted for removing inflammation, promoting abforption, and reftoring tone to the veffels. For the means adapted for removing inflammation, Ice Medicine, n° 175. Veffels running upon the furface of the eye into the IpecK are to be divided, and the eye frequently bathed with fome refrigerant collymim. By thefe means the iim- pleft kind of fpecks, when recently formed, may generally be removed ; but where they have been of long fiandinc, their removal is attended with great difficulty. Where- the fpeck is owing to an effufion of fluids between the layers of the cornea, and where it is not attended with any prominence, *ocal. applications are of little advantage, as it- 134 S U R G Specks, &e.x8 jmpoflible to remove the effufed matter without mjunnp; on the Eye. coriiea . but conliderable ferviee is derived from the 4 ^ ufe fUch remedies as are moft effeaual for promoting abiorption ; and with this view a gentle, long continued courfe of mercury, brifli purgatives cccafionally, and dlues m the neck, are found to be the moft effeaual remedies. In the management of fpecks which are prominent upon the cornea, and where inflammation is removed and the opacity is confiderable, if the cornea beneath be found, the removal of the diieafed part will leave it tranfparent and lit for viiion. The remedies proper for this purpofe are efcha- rotics or the knife. The former are applied in the form of, a powder, an ointment, or a wafh ; and thefe ought to be very finely prepared, otherwife they wulbe in danger o n- ' mating and inflaming the eye ; and they ought merely to be of inch ftrength as the eye can eaflly bear. The applications fhould be long perflfted in and frequent¬ ly repeated; and to make them ftill more ufeful, iome of the powders or ointments may be applied evening and morning, and the folution two or three times through the couife of the day. To the remedies already mentioned cauihc is fometimes preferred. With this the centre of the fpeck is to be frequently touched, till the patient complain of con- iiderable pain, when pure water is to be applied, by a pencil, or by dipping the eye in water, with the eyelids open, till the pain occalioned by the application of the cauftic be re¬ moved. The eye is then to be covered with comprefles moittened in fome folution, and this frequently repeated. The cauftic to be repeated every fecond or third day, un- lefs pi evented by inflammation. When the furgeon choofes to employ the knife, which frequently may be more effec¬ tual, the eye is to be fixed by a fpeculum (fig. 29.), or leva¬ tor (fig. 3c) ; the tumor is then to be cautioufly feparated by means of a fmall knife, and every attention paid to pre- inflammation. Thefe are the methods moft likely to be o. fervicc ; and when properly managed, they will frequently remove fpecks, which otherwife would entirely deprive the patient of the ufe of the eye ; though it is to be regretted that cafes frequently occur which baffle art. A membranous excrefcence, called pterygium, is frequently E R Y. ^ Cliap.XlIf, In this way the operation commonly AVcf,, Of the ex¬ crefcence founc[ Up0n the white part of the eye, which often fpreads ■Mcdptery- fo a. entirelY to deftroy viiion. It is fome- cence is removed. ... , - — 7, proves eiTe&ual; but inftances iometimes occur where, in- in the Head of being ufeful, it increafes the difeafe. Whenever ^ this happens, a palliative courfe is the only thing to be ,the ^ tried ; and although it will not remove the diforder, it may ^ commonly prevent the excrefcence from acquiring any ad- ditional fixe. With this intention it ought to be f requently bathed with the folution laft mentioned, and afterwards covered with a coolinir ointment. When the diforder can- not even be palliated, when viiion is deftroyed, and parti¬ cularly when the pain attending it is fevere, there is reafott to fufped cancer. In this cafe the eye ought to be extir¬ pated, otherwife deeper parts may fuffer, and the life of the patient be endangered. The method of performing this operation will be afterwards pointed out. Sect. IV. Of Abfiejes in the Globe of the Eye. Though inflammation of the eye generally terminates by refolution, inftances fometimes occur in which an ab- feefs eniues. This is owing either to impiopei treatment, or a bad habit of body which counteraAs a1l remedies. The greateft danger attending thefe complaints is when they are fituated on the cornea, as the cicatnx left by them may deftroy vifion. When deep leated, a puiulent matter is fometimes apt to be found in iome or the chambers of the eye, the ball becomes enlarged, the humours are di- fturbed, and neither the iris, pupil, nor lens can be diftin- guiftied. In fome rare cafes again, after thefe appearances have continued iome time, the cornea burfts, part or whole of the humours are evacuated, and the iris protrudes in a thickened diftended ftate. This has now the appearance of an excrelcence, which is called jlaphykma from a kind of refemblance to a grape. But under this term fome authors include all colleftions like thofe above defended. In molt inftances the cornea protrudes, but in others the tunica fcle* rotica or opaque part is afFe&ed with partial iwdlings or protrufions. While the difeafe is forming, brfides the lofs of fight, the patient commonly feels great diftrets in the eye and head, accompanied by iymptoms of fever. When no othet dibiefs * • 1 4-U^ 1 ■Pv.Vf'lllTVvT' IS Hilt glUM. 107 Method of removing excrefcen- ces. is experienced than the lofs of light, the fwelhng is but over the cornea fo as entirely to deftroy viiion. . It is fome times owing to external injuries ; at other times it antes fiom a general difeafe of the fyftem, as lues venerea or fcrophula ; but inflammation is always the more immediate caufe. . By a proper application of the remedies above mentioned affeftions of this kind may generally be prevented from becoming formidable ; but when the reverie takes place, and excrefcences begin to ipread over the cornea, other means muft be ufed. When the difeafed part is only {lightly attached, it may be freely removed by a cut of the knife ; but when this cannot be done without difficulty, it is belter to deftroy the veffels by the extenllon of which this iubftance is chiefly formed. ’1 he manner of performing the operation in general is this : The patient being properly feated, the eyelids opened, and the eye ieeured, the opera¬ tor, with a fmall knife, makes a' fcarification through the whole thicknefs of the excrefcence, entirely round, and at a little diftance from the circumference, by which the fource of nourifhment will be cut off; and, after the blooding is abated, one or two inciiions more may be made, in a iimilar manner, within the former. Some practitioners _ raife the excrefcence with a needle and ligature before the inciuon is made; and, in fome cafes, this may be done with advantage, though not in others. . . . After the bleeding is over, the part is to be bathed two er three times a-day with a weak iaturnine ^utlon ? an“ the operation may be repeated occafionally tnl the excief- 41 fmall, and contains chiefly a watery’ fluid. In the tieatment, as viiion is ftldom preferved, the principal thing is to abate the pain and remove deformity. There is another kind of ablcefs in the eye, termed hypopyon^ where the matter is lodged in the fubftance of the coats. It is fometimes pro¬ duced by external injuries, but more frequently from pu- ftules of (mall-pox. If this termination cannot be prevent¬ ed by the remedies mentioned in the article Medicine, n3 175, the matter muft be evacuated by an incihon into the eye, not regarding the humours, as vifion previous to this tin e is entirely deftroyed. 1 he prbper part is the cornea or the moft prominent part of the tumor. A variety of this diforder fometimes, though rarely, hap¬ pens, where the humours are abiorbed ; but ftill the lame external appearances are obferved. In this cafe the tumor is foimed by a thickening of the coats, efpecially the iris. The only means of relief is extirpation of the prominent part by the ufe of the knife. After the contents of the eye have been difeharged, the parts are to be covered with a comprefs moiftened with a faturnine folution, and the an- tiphlogiftic courie followed, till a cure is perfe&ed, or at leaft inflammation removed. If the ulcers diicharge a thm acrid matter, they may be wafhed two or three times a-day with a folution of corrolive iublimate, or of white vitno, &c. Fungous excrelcences, fometimes confidered as a cancer of the eye, are apt to form in both thefe difeafes after t e matter is evacuated ; but they may be prevented from m- - creaiwg Chap. XIIr. S U R G Dropfical creafingr to a confidcrable fize by burnt alum finely powder- cfThe E^e e^’ °r touc^^n.? t^Gm occafxonally with lunar cauftic. . . ■ < Ulcers on the eye may arife from the fame caufes which zcS produce ulcers on other parts of the bodvs as wounds, E R Y. U5 Ulcers of the eye. When a pundure is neceiTary, it *s to be made in the Pwrufion lame manner as in cafes of dropfy of the eye ; only the open- t^ie E>e ing may require to be fomewhat larger, otherwife the blood mayjiot pals readily out. After the operation, nothing is -i—v 5ECT. IC9 Symptoms of dropfy cf the eye. l j r..- r r ; n- * uui- -ci-iier me operation, nothing is burns, &c; or they may anie from a general affection of neceffary but to apply a comp refs of loft lint, moillened the conititution, as lues or fcrophula ; out they are more with a weak faturnine lolution. immediately produced by inflammation. In the treatment therefore of fuch difeafes, blood-letting, bliltering, laxative and cooling applications, as already deferibed in the cafe of ophthalmia, aie to be employed. When the inflammatory ftate is removed, their management muff be almoft the fame with that for fimilar affections in other parts of tae body. When the diforder arifes from an affection of the fyttem, the primary difeafe muff be attended to before a cure can be performed. With refpedt to the fores them- felvts, if acrid matter be difeharged, we muff have rccourfe to detergent ointments and wafhes before a cicatrix can be, formed. When thefe have not the defired effeft, and when the fore becomes foft and higher than the reft of the eye, aftringent applications are moil efficacious. If excrel- centes he prefent, thelc are to be removed by efcharotics, or by the knire. In fome rare inftanccs exctefcences of a fungous natuie are found to be connedled with the interior paits of the eye, and become fo prominent as even to reft upon the cheek. When fuch occur, nothing but the re¬ moval of the eye itfelf can effedl a cure. Sect. V. Of Dropjical Swellings of the Eye. I he eye is lometimes enbtrged by an accumulation of the aqueous humour. The'fymptoms are, a 1'tnfe of fullnefs the eyeball ; by degrees the motions ef the eyelids be- come impeded; vihon gradually becomes more and more im- per-ed, till at laft the patient can only diftinguilh light from darknefs. As the difeafe increafes, the ball of the eye becomes greatly enlarged, and at this time the cornea heo ms to protrude; when, it a pundure be not made, the eye burfts and empties itfelf. This difeafe is apt to be con- founded with ftaphyloma. But in the dropiical fwelling the patient is always fenfrble to the effeds of light, and the pupil is obferved to contrad, which does not happen in 2ro ‘P1) cma. In the eaily fta«es of this difeale vifion may Treacuient be PrGlerv>cd oy punduring the under edge of the cornea and allowing the aqueous humour to pafs out by the ante- nor chamber; or by punduring the tunica fclerotica a lit¬ tle behind the ins, by which the fluid will pafs out by the pottenor chamber ► , . . J . . VI. Of the Protrujion oj the Eyeball beyond its Socket, The eye may protrude in confequence of external vio¬ lence, or from tumors forming behind it, or on account off iorne of the ulcers, excrefcences, or dropfical fwellings, al- reauy mentioned. When the eye is forced out of its focket by external violence, if the eyeball be not entirely feparated fiom the neighbouring paits, it ought to be freed from any extraneous matter which may adhere to it, and immediately replaced; and if the optic rierve he not quite divided, the ufe of the eye may be recovered. W ith a view to prevent or moderate inflammation, every part of the antiphlogiftic re¬ gimen ought to be ftridly adhered to. If the protrufion is occafioned by a tumor, the cure muff depeftd upon the reir.o\al o- this ; and if the difeafe has advanced fo far that the bones are become carious, they muft likewife be eparated. But more frequently, inftead of the bones be¬ coming carious, they affume a gelatinous or rather carti- iaginous nature. In fuch a fituation an operation could be of little advantage. The beft method to prevent the bones rom being lo affefted is ai; early performance of the opera¬ tion. r A few in fiances have happened of the eye being puftied from Its locket by an enlargement of the lachrymal gland, wnen this occurs, if the enlargement be confiderable, the ftructiire of the eye will moil probably he fo much injured that vifion will be deftroyed ; but inftances have occurred of this gland, in the enlarged ftate, having been removed with¬ out any injury being done to the eye. Sect. VII. Of Cancer of the Eye, and Extirpation of the Eyeball, S.ciRRHi’s an^ cancer may arife from repeated inflam-c 212 mations of the eye or from ftaphyloma, or fome of the of of! othei oifeafes which frequently attack this organ. The the eye. lymptoms a an enlargement, hardnefs, and protrufion of the ball, with a red, fungous appearance, fometimes dif- charging thick, yellow matter, but more frequently a thin acriL. ichor. At firft there is only a fenfation of heat in pofterior chamber. The nnnbtiire ; -l “f , 1 "rlt the,e 18 only a fenfation of heat in a lancet, pointed llto'ZtT * b”' ^ i-reafing, changes at latt i he eye ought afterwards to be dreffed with a r ,n& Pa,ns> vvhicli hkewife ffioot through to the 00- made Lifk tnVK , f- ™ rdrefftd ^ 3 comPrefs P°!ltG of the_ head. In this fituation blood-lettino opiates, and emollient applications, may alleviate the pahv A hemlock poultice applied to the eye, and a waffi of lime- water with a little opium diffolved in it, and applied every time the poultice is renewed, gives fome relief; but altho* tiie pain be moderated by thefe means, it does not prevent an Blood efFu- fedi made moift with a faturnine folution, guarding againftex- ceffive inflammation. When the ufe of the eye is Lewhat r may ube reftored t0 the Part^ a return h th dl/r 38 .muJ.as PoffibIe prevented, by frequently bathing the^eye in aftnngent lotions ; but where the cornea deilroyed, the fight cannot be reftored: We can then only dimmifh the fize of the eye, and render it fomewhat more comfortable to the oatient. . ^0o^. ^ effufed* into the chambers of the eye W mtchc from vanons cufes, as m putrid difeafes, or in confeouence of .nflammation but moll frequently from a rupture of“he blood-veffels induced by external ininrv T r it rrets into fbe evr- kr,- k -i n{ whatever way tient Ihouf renders it opaque ’ It is 1 e 3queous humour> and ported by an affiftant i t , °P 18 lometiines taken up bv the ntifnr mnii Ko r . i i . 7'-“'-*° uucaiea, tney hents; when it is otherwife, it ouoht to be LeL f u r ^P3:31^ alonff the tumor ; but where they Puf-e. • S' t0 bC dlfch3r^d ^ a- are found they ought to be carefully preferred; and for A few inftances have occurred where the blond W f n ! th^y„may be out of the way by two leva- to the under fide of the eye, and remaintl hi r°;S ^ by affift3nts- When the eyeball preludes con- mixing with the aqueous humour. In fuchl ft ^ )U* bderabI>;’.tbe operator may lay hold of it with his finders • «ught to be allowed to remain. ituauon it but if this be impraaicable, a btoad ligature ftiould be ini' troduced through the centre of it, that it may be the more readily the difeale from fpreading, nor can any thing elfe but ex¬ tirpation produce a radical cure. Alter the difeafe is difcovered to be cancerous, the ope- vTorViu P kmin^bc nc ,r With0nt ^ >y /c„T £ Ltion isa^ti^T3 fhouIlnot be removed till inflam- mat ion is at leafl fo far gone that no danger will arife from , j sometimes the patient perceives lipht im tynuttlii tae t;t®?feS,W"g rem°,Cd’ bUt m0re rltnkr^?:fr;ta^tr^,hh:0aPr found ?he catarad to be of the^ifed kfnd'd'r8’ When he JiLl - f ’ m. winch cafes the lens hardly ever failed of cataract ^ ^ ^ ^ the fmaIleft vt%e of a right eye the ftrai e^perat^n 18 *1 be Perfbrmed "pon the left th^ttraigbt needle muft either be ufedhv the «'e;thai^Trr,rfbplrhimMf bch;"d r"- with a large curve bv which thS bCen c.ontnved» however, performed with the m ht hand wh'f'tl"0? b? read'lf before the patient onlv th, ’ W,f,k.lhe » placed a.8 “"'J be d<>"0 operator. It ia^eceifarv to f" ‘he krt hand °f the tviU fecure without hurting “e 'eye “'Sffre(rur£ as the cornea to be prefled too ♦ u ' • . Llther ought ter be wounded. K onot,„ ' left th£ 33-), and holda it in the lame wlyTheir k"ife (fi«- Pouching; he then enters the poTof tthh A '/“‘‘T'' moft into thc cornea aho,.i J-A W1,th the edge under- conneftion with the fclc f* * ance ^alf a line from its ofthepupilTt is then ro C and as high as the centre ner angle in an horizontal -tbe pupiI to the in- outwards tn nonzontal direftion, keep ng the ed'Te a litrle T Vll,cuus numour >s evacuated. This VoA'v&t - - *4 - S - ^-eSST nr three weeks E R Y. tthenundebehP1ffheAlhr0Ugh t0 WllCre k™^‘, Cataral7 the under half of the cornea is next to be cut, and at the v v ame diftance from the fclerotics with the parts at which the point of the knife went into and came out from the In cuttIng th(l UTlder half of the cornea the prdTure of forfe Tn ^ he gradually leffened ; tor d the eye be too much comprefled, the aqueous hu’ mour, with the cataraft and part of the vhreous hi IdthT- 3T t0-be f°rced fuddenIy out immediately a. ter the mc.fion is made. The operator then takes a flat probe, and raises the flap made in the cornea, while he pafles the fame inftrument, or another probe (fig. ) rough at the extremity, cautioufly through the pupil, to feratch an opening m the capfule of the lens. This being- done, the eye fliould be fhaded till the lens be extraded, or the eyelids are to be Ihut to allow the pupil to be dilated as much as poffiole ; and while in this fituation, if a gentle prdTure be made upon the eyeball at either the upper or under edge of the orbit, the cataraft will p3fs thfoun-h are" opfn readlly than h WOuld do when the eyelids Ir the lens cannot be eafily pufhed through the opening of the cornea, no violent force fhould be ufed, for this would tend much to mcreafe the inflammation. The opening M beixe^argee’ f° 38 t0 all°W the lens to Pals oufmorf y. When the cataraft does not come out entire or wheu lt is found to adhere to the contiguous parts ’the end of a fmall flat probe, or a fcoop (fig. 2 c.) is to be introduced, to remove any detached pieces or adhe- f’T ,tbat ^ ^ PrfThe iris fometiines either pro- jeds too much into the anterior chamber, or is pufhed out through the opening of the cornea. When this hapoens, orobe0r rftUrned.to lts natural fituation by means of the thehnH S.ometIme8 the opacity is not in tains hY The t’ a* ent,rely, ^^ CapPule ^’hIch con' tains it. I he extradlion of the lens alone would here eve A ?aflU PUrp°fe* Some Petitioners attempt to extraft, firft the lens, and then the capfule by forceps • others the lens and capfule entire. Thofe who\aveTad much practice in this branch of furgery, as Pellier, fay they find iuch a method praaicable ; but others think it better to truft ent^ely to tjme and a cooI;ng reg;men for the cu which, in fome mftances, has taken place. When the ope! ration is to be performed on the right eye, the operator^is tieTr tH1 left hdnd,’t0 take his ftation bchh‘d the pa! tient, or to employ a crooked knife (fig ^6) P rnhVTrr«ht not *» ks ien it fhould onJy be done in a dull Ij.rht, otherwife ir may fuffer coufiderabJy from the irritation’ which a ftrong he veZ hT10,"* iThen the C>'e is to be -arnined, § wl7;,idTbe/°Und adbenn^ to^ther, they ought to be 0*5, d if b f?rae Sentle aftringent. With this the eye ought alfo to be frequently wafted afterwards, by which it will graduaHy recover ftrength and fight Ahnn/ S end of the third week the dfeffing Jy be entlelv r^ moved, and a piece of green (ilk pot over the eyes 'as a fhade ; and if every thing has fucceede 1 tli<= generally go out after a loth fT the ’ti^ Pa"hkhT operation was performed. Ch the Pt haPpens, that in extrading the lens a nor tion of the vitreous humour is evacuated rl 5 P general prevent the fuccefs oHhe optation Th” "0t foon begins to fill a^in J °petation. The eye s U R o Lula WfCk8 it is for the mo ft part as large as it was previous to Lachryma- the operation. Wkether this be owing to a renewal of the , l,s- ,vitreous humour, or merely an aqueous feeretion, is no U V yet determined; though thelatter circumftance is generally iuppofed. Chap. XIV. Of Fijluta. Lachrym&Hs. Bv this difeafe is properly underftood a finuous ulcer of the lachrymal fac or dud with callous edges, though every ob- ftruftion of this paflage is commonly called jytuta iachry- Sym*° ms'*2 The firft and moll fimple ftate of the difeafe is that term- oymycoms me urn aim iuuil ®f rhf dif- e(j a dropfy of the lachrymal fac. The fymptoms are, a tu cafe in its - % . linp ni tn< „ , , m„; between the inner eornea of the eye and fide of the fom, p nofe. This difappears by preffnre, the tears rn^ed w.th mucus palling partly into the note, hut chiefly back upon the eye and over the cheek. This itate of the difeaie is what the French have called the hernia, or hydrops facculi lachrymalf. It is frequently met with in children who have been rickety, or are.iuojet.t to glandular obftructicns : and in this ftate it fometimes ic- mains for feveral years, fubjedf to little alterations, as the health or habit ihall happen to vary, the facculus being fometimes more, fometimes lefs full and troublefome ; t.ie contents which are preffed out are fometimes more, fome¬ times lefs cloudy; and now and then the difeafe is attended with a flight ophthalmy, or an inflammation or the eyelids, but which, by common care, is eaiily removed. It the iac- cuius be not much dilated, the ditcharge fmall, and produ¬ ced only by preffure, the chief inconveniences are the weep¬ ing eye, and the gumming together of the lids alter lleep- ing : but thefe, by being attended to, may be kept from being very troublefome ; and if the difeafe makes no fur¬ ther progrefs, may be lo regulated as to render any mote painful procefs totally unneceflary. If the dilatation be con- fiderable, the fwclling is more , vifible, and the quantity of fmid is larger ; it is alfo in this ftate more frequently mixed and cloudy, and more troublefome, from the mote frequent necelfity of emptying the bag ; but if the patient be an adult, it may, even in this more dilated ftate of it, be kept from be¬ ing very inconvenient. If an inflammation comes on, the tumor is thereby confi- derably increafed, the difeharge is larger, as well during fleep as upon preflure ; the Ikin covering it lofes its natural whitenefs and foftnefs, becomes hard, and acquires an infla¬ med rednefs; and with the tears a mixture of fornething, which in colour refembles matter, is difeharged, efpecially if the prelfure be made with any force, or continued for any time. When the parts are in this ftate, the contents of the bag have fo much the appearance of purulent matter, that they are now generally confidered as fuch, though Mr Pott and feveral others have been of a different opinion, conlidering the lluid as merely mucus under a different form; allowing, however, that pus is fometimes difeharged. If the putnfta lachrymalia be naturally large and open, and the inflamma¬ tion confined to the furface of the fac, its contents will pafs off pretty freely, and the fkin will remain entire. In its ad- But when the flein covering the lachrymal bag has been ■vanced fol- fome time inflamed, or fubjedt to frequently returning inflammations, it moft commonly happens that the pundta lachrymalia are affe&ed by it, and the fluid, not having an opportunity of palling off through them, diftends the infla¬ med flein ; fo that at laft it becomes floughy, burfts exter¬ nally, and forms an opening in the moft prominent part of the tumor, at which the tears and matter contained in it are difeharged. When the opening thus formed is fmall, it E R Y. Chap. XIV, commonly heals again in a few days, but it burft* as Toon M Fiftsi, a confiderable quantity of this fluid is colkaed ; and n eonti.La^yma. nuesthus to collect and burft alternately, till the open.ng be- comes fufficiently large to prevent any farther colledtion. 1 ms ftate of the diforder exhibits exadtly the appearances ot a fi¬ nuous ulcer, with callous, and fometimes with retorted edges ; and this ftage forms properly the real fittula lachrymalis. Tears, mucus, and purulent matter, are now abundantly d.i- chanred from the fore. When the bone beneath is found, this difeharge is feldom either acrid or offenfive to the Imell, for the opening being in general in the under part ot the tumor, the matter is readily evacuated ; but when any of the contiguous bones are carious, they are not only found to be fo by the introdadlion of a probe, but by the appearance, fmell, and effedla of the matter upon the neighbouring parts. In this cafe it is thin, fetid, and commonly fo acrid as to fret and corrode the integuments moft contiguous to the ulcer; and when the diforder is connefted with fcrophula or with lues venerea, which is by no means an unfrequent occur- rence, the difeharge and appearance of the fore wnl vary according as it happens to be combined with one or other of thefe diteafes. , . ,.r r . . T, From what has been faid, we may divide this difeafe into The« four generJheads or ftate^under which all its more minute to four diftindions may be comprehended. The firft coniifts m a^. fimple dilatation of the facculus and obftruftion of the nafal daft, difeharging, upon preffure, a fluid either quite clear ora little cloudy'; the fkin covering the bag being entire and perfectly free from inflammation. In the fecond, the tumor is fomewhat larger; the fkin which covers it is in an med ftate, but entire.; and the difeharge made through the pundta lachrymalia is of a pale yellow or purulent colour. In the third,the flein covering thefacculus is become floughy,and burfts; by which means the fwelling is in fome meafure lef* fened: but the matter which, while the flcadente. , ---- T’ ”’- —- —— -.f, v..-. Lachryma- an(j ^ifeaied date, are great objections on the fide of the > '*’ .parts, fuppofing it were capable of anfwering any valuable end, which it moft ceitainly is not. That the pafling a fine probe from one of the punfta la- chrymalia into the nofe is very practicable, is known from experience ; but the pain it gives, and the inflammation it often excites, arc much greater than any benefit which does or can arife from it. It is faid that the principal ufe of this probe is to clear the little dudls leading from thepunbta into the facculus, and the obftrudtion of thofc dudts is often men¬ tioned as a part of this difeafe. Hence one would be led to fuppofe that it was a circumftance which frequently occur¬ red ; whereas it is feldom, if ever, met with. Nor, even if it did happen, could it ever produce the difeafe in queflion; the principal clmadferiftic of which is a difeharge into the inner corner of the eye upon prefiure made in the angle. The fyringe, it ufed judicioufly while the difeafe is re¬ cent, the fac very little dilated, and the mucus perfe&ly clear, will fometimes be found ferviceable ; it gives no pain; and a few trials render the ufe of it by no means troublefome. There is very little occafion, however, to take much trouble, or to put the patient to fo much unealinefs; for if the fac be emp¬ tied by comprefilon, if the liquor which was to have been injected be applied to the pun&a, they will abforb it as rea¬ dily as the fluid which naturally paffes through them. Fabncius ab Aquapendente invented an inftrument, which was fo contrived as by means of a ferevv to make a preffure externally on the lachrymal bag ; from the ufe of which, he fays, his patients received much benefit. This inftrument has been confiderably improved by late practition¬ ers, and is ftill recorqmended as very ufeful. See fig. 39. All the good that can be obtained by comprefs and ban- dage, this ferew is capable of procuring; but it is alfo fub jed to all the fame inconveniences, arifing from the impoffibi lit} of determining exadly the due degree of preflure; for if it be fo great as to bring the fides of the upper part of the fac into contad, all communicationbetween it and the punda will be thereby flopped; if it be but flight, the accumulation will not be prevented ; nor does it in either cafe contribute to the removal of the ooftrudion in the naial dud, the primary and original caufe of the difeafe If the curative intention was to procure an union of the fides of the facculus, as in the cafe of parts feparated Trom each other by the forma¬ tion of matter or floughs, and the preflure could be made uniformly and conilamly, poffibly it might be fo managed as to antwer a valuable purpoie ; but as that is not th/in- tention, the preflure, whether made by an inftrument or by a common roller and comprefs, contributes little or nothing toward a cure. s 'W hen the difeafe is only beginning to form, if the la¬ chrymal fac be frequently preffed with the finger, the c in¬ tents of it will be difeharged before they become acrid, and the complaint, though ieldom to be cured in this manner may be fometimes endured without any other affiftance.’ Trp.r' pm f - fl1™ ^ dlfeale haS advailced kr as to be in a ftate during1 the ° 'nflam";atl011. conhderable relief may be obtained from ,fe- r.d and . lemedies as are found to be ufeful in inflammatory af- *hird ftagei, . tlons of other parts of the body, as blood-letting, laxa¬ tives, and W diet, together with faturnine applications to he parts affedled. But when thefe fail, and it is found that the paffage of the tears to the note is completely obftru&ed, as the matter, if it does not burft outwardly, mly be in dan! fo be fSed"g U"‘krne,th’ a praftice is i.i"an °Pcr"!,S;n '!« uPPer part of the facculiu iachr} mahs becomes in general abfolutely neceffarv • and as ■* W0U;ili made by a leaves a much lefs difagreeable fear iT>7 1 . , than that which neceflarily follows the burfting of the (Itin, Fiftula one being a mere fimple divifion, the other a lofs of fub-Laci]^'>'n^a,,,. fiance ; it will always be found beft to anticipate the acci¬ dent ot hurfting, by making the opening as foon as the inte¬ guments are in fuch a ftate as to threaten it. _ For making this incifion, authors have been very par¬ ticular in their dire&ions with regard to its place, manner, and form. But all that the furgeon need obferve is, to take care to keep the knife at a proper diftance from the junc¬ ture of the palpebne, to begin the incifion a very little above a lyie drawn from that jundlure toward the nofe, and to continue it downward fo as to lay the fac completely open ; and the belt inftrument to make it with is a fcalpel of the common form, but of a fmall fize. If the facculus be alrea¬ dy burft, the place of opening is determined ; and the ori¬ fice may be enlarged wfith a knife, or dilated. The incifion being made, the contents of the tumor fhoull be moderately prefted out; after which, fame pradlitionerj advife that the nafal dudt ftiould be fearched for by means of a probe ; and if found, that a piece of catgut, bougie, or lead, fhould be introduced, and kept there, its edge being bent a little downwards till the fides of the du& are fleinned over and healed. In the mean time, the fore is to be drefled with fimple pledgets of wax and oil, which are tube retain¬ ed by means of adhefive plafter. As foon as the paffage of the tears into the nofe is fufficiently fecured, the fubftance which has been left in it is to be withdrawn, and the wound healed. ^ The Lift ftate of this diforder is that in which the natural during ths paffage from the facculus to the nofe is fo difeafed as to be'a^ ^aSe* quite ouliterated, or in which the bones are fometimes found to be carious. ^ Fhe methods hitherto defenbed have all been calculated to preferve the natural paffage, and to dnve the lachrymal fluid again through it. In this attempt th«y are fometimes fuccefsful ; but when every trial for dif- 429 covering the nafal duel has been unfuccefsful, recourfd muff Method <»f be had to an artificial opening for the tears. In performina-making atl this part of the operation, the patient fhould be feaced op" polite to^a window, with his head fupported by an affif- tant. . The furge >n is to place himlelf immediately, be- foie him, either in a fitting or {landing pofture. The canula of the trocar (fig. 40.) is now to be introduced to the under and back part of the lachrymal fac, and held with one hand, while the ftilette is to be paffed into it by the other, in a direflion obliquely downwards and in¬ wards, between the two fpongy bones, till it reach the ca- vity of the nofe, which will be known by fome bloody mu¬ cus pafling out at the noftril. As foon as the inftrument has penetrated the nofe, the opening ftiould be made fuffi- ciently large ; then the ftilette ihould be withdrawn, and a bit of cat - ut or bougie, or what is more cleanly and con¬ venient, a leaden probe, is to be introduced, and the canula removed. One end ol the probe ought to remain in the noie, and the other bent in fuch a way as to hang over the ed -e of the wound, and at the fame time be in no danger of coming out. The fore is now to be covered with a pledget of lint fpread with emollient ointment, and the whole re¬ tained with adhefive plafter. The probe rmift be removed every day or two, fo as to allow it and the oailW to be cleaned ; and at each dreffing fome aftringent injeftioii fhould be thrown in, when the parts are to be drefl'ed as at hrit. beveral weeks will commonly be neceffary for render¬ ing the paffage perfectly callous ; but this muft depend much upon the ftate of the parts, as well as the conftitu- tion ot the patient. After the pafl'age is become fufficiently callous, the dref- imgs and ptoBe are to be withdrawn, and the parts cleared irom any mucus with which they may be fluffed. The S 3 ' fides ' li!. -330 Mr Pel- lier’s me¬ thod of ,40 S U R G Fiftula fides of the vvounutheand^'I,AP* Of dffe El ions of the Mouth and Throat. Throat. Sect. I. Of the Dlvjion of the Parotid Dud. When the parotid duft is divided, the faliva which it tranfmits pafies over the cheek inftead of going into the ca- vity of the mouth. When the furgeon is called to a recent divifion of the du&, he ought to lay the divided ends of it as exadtly to¬ gether as pofHble, and to retain them in their fituation till they are united by adhelive plafters, or by the twilled future if there be confiderable retraftion of the parts. But when the portion of the duft next the mouth is entirely oblitera¬ ted, an artificial palfage mult be made into the mouth, and an union formed between the opening and that part of the duA which proceeds from the parotid gland. The artificial paflage ought to be as much as poflible in the direAion of the natural duA. For this purpofe a perforation of a proper fize is to be made obliquely into the mouth with the trocar (fig. 44.), from the fide of the wound exactly oppofite and contiguous to the under extremity of the upper portion of the duA ; and then a piece of leaden probe of the fize of the perforator fhould be in- .u06!!57 T?5 °f th.e canula’ and be ^ ^ the cheek till the hues of the opening become callous; when the lead being withdrawn, the extremities of the'artificial and natu¬ ral duAs are to be brought into contaA, and retained there byadhefive plafter till the cure is completed. Another method has, m a few mftances, been followed by Mr Latta (fee his iyfem of Surgery), of introducing one end of a bit of cataut M t} ^ °penT’ and brinSInS ft out ^ the mouth, wh le the other is introduced a little way into the extremity ct the natural duA, and retained by adhefive plafter till the wound is healed Whichever way the operation is done" Jot£n as fTK 1 and make ^3 little ^notion as potable with his lips or jaws. Bect. II. Of the Hure-lip. The hare-lip is a fiffure in the upper lip, very feldom in the uncer one. it is attended with want of fubftance, and has its name from a refemblance to the lip of a hare. In general U is only a fimple fififure, though fometimes it is double ; in which cafe it renders a cure more difficult to be executed. 1 here are many lips where the want of iubftance is fo great, that the edges of the fiffure cannot be brought together, or at eaft where they can but juft touch, and then the attempt fhould be forborne. It is likewife improper in infants, and ought not to be performed till feveral months after they have been weaned, when they will have acquired more ftrength to J|ndergo the operation, and will be lefs -liable to be at- erfafan e V C.°^PIai"ts’ which frequently make them cn at an earlier period of infancy. ffioTuldPhTfeCdl’nV° the0pcrati0"’ the Paticrit» if a child, unnn ^ WCUrK T" " knee’ or rather perhap upon a table ; but ,f an adult, he is to be feated upon a chair, in a proper light. The fraenum conneAing the gums to the upper lip is to be divided ; if a fore-tooth proieA much as to prevent the parts from being brought^roperly hTui^hV th/fiffiL^ pS a k ' Palate,’if a fmaU portion of bone fufted ’the o • renJ°VeLd-1 Matters beiV fo far ad- betwe’en tL I" 15 !°rIay choId °f °ne iide of tbe fi^re (f.p. he thumb and fore-finger, or between the forceps (fif 46’o? hra ?a'[ °f fharp and very ftrong feifi’ars lipfand to renl1 It3 cut off a thin portion of the Mure, fo as toPrend e ?mei t^in? Upon thc otbcr fide °f tbe ; t0 render thc whole edges of the fiffure completely 131 Operation for the bare lip. E R Y. 141 raw; by which, if tbe operation be properly performed,a piece Affe&ions will be feparated in form like an inverted V. After the in-..of^he . cifions have been made, the vefiels ftiould be allowed to bleed jjiroar' freely to prevent inflammation ; and when the bleeding has ^ y ceafed, the fides of the wound are to be brought accurately together, and kept in that ftate by the twifted future. The firft pin ought to be as near as poffible to the under edge of the lip ; another is to be inferted near the upper anvle • and if the patient be an adult, a third pin will generally be neceffary, half way between the other two. In paQing themj they ought to go rather deeper than half through the lip, that the edges of" the wound may be kept properly in contaA. An affiftant now keeps the parts together, while the operator applies a firm waxed ligature firfl to- the under pin ; and having made three or four turns with it in the form of an eight figure (fig. 47.), it fhould then be carried about the fecond, and in a fimflar way about the third, care being taken that the thread be drawn of a pro. per tightnefs. After the ligature is fecured, a piece of lint, covered with fome mucilage, fhould be laid over the wound to proteA it from the air ; and this is commonly all the bandage neceffary. When, however, from a great want of fubftance, the retraAion has been confiderable, fome advan¬ tage is derived from the ufe of adhefive plafters applied to the cheeks and tied between the pins. During the time of the cure the patient fhould be fed upon fpoon-meat, and prevented from making any exertion with the lips, otherwife the cure might be confiderably retarded. At the end of five or fix days the pins may be taken out, wfien the parts will commonly be found completely united. In the cafe of a double hare-lip, the operation fhould be firft done upon one fiffure ; and when a cure is completed there, it may be done fafely upon the other. Sect. III. Of Extirpation of Cancerous Lips. The under lip is much more frequently attacked with cancer than the upper, or indeed than any other part of the 0. y ' as little dependence is to be placed upon exter¬ nal applications or internal remedies, recourfe muff be had to the knife as the only certain method of cure. When the difeafe has not attacked anv confiderable part of the bp, the difeafed part is to be cut out, and the wound cured by the twifted future. The ooeration ought there¬ fore to be performed early, to allow the parts to be brought properly together. The general fteps of the operation arc nearly the fame as m the operation for hare-lip, and there* ^ rePeated- 11 is °nly to he obferved, that all the difeafed parts are to be removed, taking care to make the cut in fuch a way as will moll readily admit of the twill- ed or hare lip future When the parts can be brought to¬ gether, the hp will have nearly the fame appearance as in the operation for hare-lip ; but. when- the difeafe fpreada over a confiderable part of the lip, fo as to prevent the found parts from being united after the difeafed parts have been removed, all that can be done is to remove the part affeAed, fecure the bleeding veffels, and drefs the fore like any other* recent wound. ^ Sect. IV. Of HJfedions of the Teeth, - In dentition the gums inflame and fwellabout the partsrv -here the teeth are af terwards to appear t the child tinually rubbing the gums with its finger; the faliva is com* monly mcreafed m quantity, though fometimes the contrary happens; fometimes the bowels are remarkably coftive, tho’ more frequently the reverfe : there is generally quick pulfe with heat, and other fymptoms of fever; and on Pfome occafions thefe fymptoms are attended with convulfions iiie meaiis found to jje mil ufeful here are fuch as ars 34a /Wic-diins of the •Teeth. S tf R »<-t raoit eftftiial in allaying irritation; at opiates, bit;', ters, and tfpeciallr varm.l,athini.r. When theft fail, cut. i ’ the gum by means of a fleme (fin. 48 ). approac C wuiii v . . hi.va tooth, is frequently found to remove every • £> . . 1 i i _. - flvtnn »t mm- Etom but tin; ought to be done earlier than it com. nlonlv is to have the full effect Whenever the fymptoms n-ive reafem to think that a tooth is approaching, the gums fhould be cut freely over that part where the teeth may be firft expected When the fymptoms recur, the operation *33 Xferange- jnert of tl teeth. ‘*34 Of loofe tcech. fliouid be repeated. A crucial incifion is attended with ihll more effeA ; and the bleedimOwhich afterwards takes place is of conliderable fervice. The incifion Ihould always be carried as far as the tooth, which ought to be fomewhat ex- pofed; and when properly done, is frequently followed with immediate relief. Sometimes the fame kind of fymptoms attend the cutting of the fecond fet, particularly of the dentes fap entiae. When this is owing to the tlneknels of the gums, fcarifyiog gives the greateft relief; but fometimes it is for want of room in the jaw, and then the tooth Ihould be drawn. . ■ Derangement of the teeth happens more freqttentiy m cthe fecond than in the firft fet, and more commonly in the fore than in the back teeth. This may be owing to the firft fet remaining in the jaw after the lecond have appeared. Another caufe is a wafte of fpace in the jaw ; and a third Is a rnal conformation of the teeth, where they are too large in proportion to the jaw, and therefore overlope each other. The remedy is the fame in each of thefe cafes, viz. to ex* tradft the teeth which ftand in the way of the reft, to allow thofe which are out of their place to come into the row, and put on a more uniform appearance. _ The ufual method of moving teeth which are out of tne row is, by fixing them with a ligature to the neareft teeth ; or the fame thing is done by metalline plates or pieces or wire. But thefe methods have not been found fully to an- fwer the purpofe intended, though in forne cafes they may be tifeful. When one or more front teeth are accidentally drawn out of the jaw, they ought to be immediately repla¬ ced. When the teeth are broken over or otherwile inju¬ red, they may be fupplied with others tranfplanted from the jaws of another perion; but this can only be done when the fockets have been newly emptied, for after inflammation comes on it is impracticable. In thefe cafes the inflamma¬ tion muft be allowed to fubfide, and then artificial teeth can be readily adapted. When the teeth are loofened by external violence, by falls and blows, or by improper ufe of inftruments in pulling dif- eafed teeth in the neighbourhood of lound ones, they may a;min be made tolerably faft by prefiing them as firmly as poffible into their fockets, and preferving them fo with liga¬ tures of catgut, Indian weed, or waxed filk, and keeping the patient upon fpoon-meat till they are firm. When look teeth are owing to tartar, nothing will fallen them till the caufe be removed ; and this ought to be done early, other- wife it will have no effe&. Frequently the teeth become loofe from a fponginefs in the gums, often, but improperly, attributed to feurvy. The beft remedy is fcarifying the gums deeply, and allowing them to bleed freely ; this Ihould be repeated till they are fully faftened. . Mild aftringents, as ( tin&ure of bark, are here attended with good effects, tho thofe of a flrong nature will certainly do harm. 1 he mouth fhould be frequently. wafhed with cold water ftrongly im¬ pregnated with thefe, and the patient fhould not ufe the teeth which have been loofe till they become firm again. The loofening of the teeth in old age cannot be remediec, as it is owing to a wafting of their fockets, from winch the teeth lofe their fupport. . The teeth fometimes become yellow or brack without G E R. Y, Chap.XVr, any adventitious matter being obferved in them; at other times they become foul, and give a taint to the breath, m £thj confequence of the natural mucus of the mouth, or part, of ^ the food remaining too long about them, ft he moft fre- ouent came of foul teeth is the iubftance called tartar, which g deani^ k-ems to be a depofition from the ialiva, and with which the the tecch. S often almoft entirely iacrufed. When th,S fab- fiance is allowed to remain, if mfinuates itfelf between the rrUms and the teeth, and then gets down upon the jaw m ^ r —4.^ irrr-i n I rm in* fucTa manner as frequently to loofen the teeth. This in, deed is by far the moft common caufe of look teeth, and when they have been long covered with this or with any other matter, it is feldom they can be cleaned without the afliftance of inftruments. But when once they are cleaned, they may generally be kept fo by rubbing them with a thm piece of foft wood made into a kind of brufli, and dipped into white-wine vinegar ; after which the mouth is to be wafhed with common water. , , . „ . .c When the teeth are to be cleaned by inftruments, the operator ought, with a linen cloth or with a glove, to. prefs againft the points of the teeth, fo as to keep them firm in their fockets, with the fingers of the one hand,, while he cleans them with the neceftary inftruments, fiLT r | n° x, 2, 3, 4, I, held in the other; taxing care PM not to ferape them fo hard as to loofen them, or to rub ofBcc™ the'enamel. This being done, the teeth fhould be rub¬ bed over with a fmali brufh, or a piece of fponge dipped in a mixture of cream of tartar and Peruvian bark. 1 he fame application may be made to the teeth for a few days, after which they may be kept clean as already directed. Tbe teeth are fometimes covered over with a thm dark coloured feurf, which has by fome been miftaken for a wa¬ fting of the enamel, but which is only an extraneous mat¬ ter covering it. By perfeverance this may be cleaned oft as completely as where the teeth are covered with tartar; but it is apt, after fome time, to appear again. When this is obkrved, the fame operation mull be repeated. For the purpofe of applying powders or wafhes to the teeth, a brufh or a fponge is commonly employed ; the latter is certainly preferable, as being kfs in danger or wearing down the enamel, or of feparating the teeth. 'Phe caufes producing toothach may be, expofure of the 0f tooiii* nerve of a tooth, by breaking or wafting of the enamel, in-ach., flanimation in or about the tooth, or from fympathy when diftant parts are affected, as the eye, the ear, the ftomac , or the uterus, as in time of geftation. After toothach has once been produced and removed, it is apt to return by ex-, pefure to cold, by taking hot liquids, by hard bodies prefleq againft the nerve in the time of chewing, by the ufe of a pick-tooth, &c. , i With retpetl to the cure of this difeafe, no rule can beMe hoF laid down which will anfwer with certainty upon all occa-cure, lions. No remedy has yet been difeoveted which will at all times even moderate the pain ; relief however, is frequently obtained from acrid iubftances applied to the tooth, fo as to deftroy the irritability of the nerves, fuch as opium, fpuit of wine, camphire, and effential aromatic oils. When fail, blifters behind the ear, or deftroying the nerve by the cautious uk of llrong acids, or by a red hot wire frequent¬ ly applied to the part, have been attended with advantage.. When a black or mortified foot appears on a tooth, if it be quite fuperficial, it may be removed ; but it it go throug the thickuefs of the enamel, it will be more adviiabie to let it remain. # When a fmali hole breaks out in a tooth, particular tention fhould be paid to prevent the admiflion of air. I ”1' lead, or gold-leaf, commonly employed for this purpo e, fomeUmes give rebef for many months, or even years i 711 at CVi ap. S U R Aff ^ion of the Teeth. xvr. at other times are of little advantage, and in fome inftances create great pain. Gum-maitich or bees-wax are frequent¬ ly employed, and can be made to fill the cavity of the tooth ft ill better than metalline fubftances. When fluffing is to be employed, it oupht to be done in the intervals of the fits of toothach, otherwifc it will give great uneafinefs. When it is to be ufed, the whole cavity of the tooth ftiould be fill¬ ed ; and this is to be done with the inftruments, fig. 52. 338 n'' r. 2, 3. Method of When the remedies made ufe of for the removal of tooth- the tooth aC^ ^aVe 'n t*ie‘r an^ ^ is found that the com¬ plaint ftill continues, it will be- neceftary to ext raft the tooth. In doing this, it may be obferved, that all the teeth may be pulled to either fide, excepting the dentes fapientias of the lower jaw, whvh ought to be pulled outwards, other- wife the jaw may be fplintered. As foon as the focket is cleared of blood, if the tooth be not much fpoikd, it may be immediately replaced, when it will become as ufeful as before. It is difficult, however, to replace the large grin¬ ders, on account of their diverging roots. The more per¬ pendicularly the teeth are pulled, the Id’s contufion and in¬ jury will be done to the jaws and alveoli. But as no mftrument has been yet invented capable of efteftinT this properly, furgeons are obliged to be contented with an inftrument which afts in a lateral direftion. One of the heft is that (fig. 53’) form of a key, with a claw and fulcrum. Previous to the operation, this fhould be covered with a linen rag, to prevent the gum from fuffer- ing. After dividing the gum, or feparating it from the tooth, the claw is to be fixed as deep between the teeth and gum as poffible. Then the fulcrum is to be applied on the oppofite fide. . The furgeon may now, with one turn of the handle of the inftument, pull the tooth out at once. But the turn ffiould not be effifted by a fudden jerk, but in the .moft cautious and flow manner. When it happens to be one of the great molares, whofe roots diverge very much, and when they are firmly fixed, after only loofing it with the firll pull, the claw of the inftrument is to be aoplied to the other tide of the tooth, and the turn given in a contrary direftion to the firft. After it has been Efficiently loofened in this manner, it is to be laid hold of by a common teeth » *orcePs (hg- 54-)> anfi extrafted in .the eafieft manner. Up¬ on extraction of the tooth, any detached fplinters occur¬ ring are to be immediately removed. Should any confider- able hemorrhagy take place, the patient may takeVome cold water, vinegar, or fpirit of wine into his mouth, and doffils of lint may be introduced into the foeket. After all thefe fad, recourie muft be had to the aftual cautery. When ft amps occur from caries, or when the teeth have broken m tuna of the extrafting, the common key will fometimes remove them ; if that fail, the punch (fig. c f ) is to be ufed 1 he operator, having this inftrument in one hand, is to place the fore finger of the other, with a piece m cloth wrap,,«1 rourdit, upon the mlide of the jaw oppo- llte to the fTllinn- tn 1 • J e. O E R v 1^3 ligature to fix it; but if a ligature be found neceflaiy, it Bolls and may be made of threads of fine filk properly waxed. Af- E*crefcen- ter the operation is finiftied, the patient ought to avoid CQ°nf1the' whatever may be in danger of fnaking the tooth, and this Uy1‘S' f is to be attended to till the tooth is perfeftly firm. Tie fhould alfo guard againft: cold and moift air, and live upon fpoon-meat. Sect. V. *39 Of rranf- planting iceth. Of Boils and Excrefcences cf the Gums. Gum boils may arife from cold or from external violence, Of gum See. but moft frequently they are the confequence of tooth-k0^5* ach. The complaint begins with pain attending a tumor on the parts aftefted ; by degrees the fide of the face fwells considerably ; the tumor of the gum now begins to point ; and if it be not opened, it burfts and gives the patient im¬ mediate relief. When the boil is owing merely to inflam¬ mation, after the matter is evacuated, the complaint goes off; but when it proceeds from a caries of a tooth, it will continue as long as the caufe remains ; the tooth therefore ought to be extrafted. After the abfeefs has burft, if the matter continue to be difeharged, it may fometimes be dried up by injefting fome aftringent liquor ; but the moft effectual method is to lay the abfeefs-fully open, and to heal itfiom the bottom by doffils of lint. Sometimes abfeeffes occur or a more dbftinate nature, owing to a carious ftate of the jaw. In that cafe fuppuration ought to be promoted, and the part laid open as foon as matter is formed; keeping the paffage open for the difeharge, being the only means for effefting a cure. Excrefcences of various degrees of firmnefs fometimes Excrcfcen- grow upon the gums. Some are foft and fungous, while ces“l others are of a warty nature. In general they are not at-gum*‘ tended with pain. They frequently originate from caries ©f the teeth, or of their fockets ; in which cafe the removal of the fpoiled teeth, and the fublcquent exfoliation of the cari¬ ous part of the jaw, will often ^ccomnlifh a cure. But when this does not happen, the tumor fhould be removed as foon as.it becomes troublefome, otberwife there may be dan¬ ger of its ending in cancer. The removal may be effefted by a ligature or knife, according as the tumor may have a narrow or broad bafis. It is fometimeg neceffary to ufe a fpeculum oris to keep the mouth open. After the tumor is extirpated, the wound ffiould he allowed to bleed freely to prevent fubfequent inflammation. When the-hemorrha- gy proceeds too far, it fhould be reftfained by the applica¬ tion of fpirit o- wine, or tinfture of myrrh, or folntion of alum, Ac. and ffiould thefe prove unfucceisful, the lunar cau- iric will feldom fail of having the deiired effeft. No dref- • fings can be applied ; but for fome days after the operation, the mouth ffiould be frequently waffled with a warm emol¬ lient decoftion ; and the cure will be afterwards promoted by the application of fome gently aftringent liquor, as port wine, tinfture of rofes, &c. ^ ~ . , - - 1 “mu*, ui cue aw oppo- „ iite to the flump, to proteft the neighbouring parts. Sec- VL Of Ahfcejfes, &c. in the Antrum MaxMdre leeth can never be -o T-. . .... . ^uiare Teeth can never be tranfplanted with proprieTyffi child¬ hood or in old age. I he conftitution muft be free from thofe difeafes which afFcft the gums. The tooth to be tran planted mull be takca from a perfon of a found con. Ititution, otheiwife it will convey mfeftion. To vuard as much as poffihle aganift infeftion, it ffiould be immerftd nnd^l T*T ^ UkeWa;m WaCer> and then dried ‘too la ^ th" locket exaftly ; if it be n^c ags o Mm rd/OWn’-a¥“dl‘ng the level wTthth " ft I h^furface of it ffiould be at firft on a with the reft, or rather a little more depreffed that it Soctotr? Pfb,C “ lOhetooth'ilt .khe locket properly, there wffi be ho occafion for ufmg a . J. H1 s dlfcafe 18 knowir by a pain and uneafinefs beginninr in the cheek, and extending upwards to the eyes, nofe, and ears together with a fwellmg, which in the latter ftages of the difeafe tends to a point, moft frequently in the cheek. Sometimes a dilcharge enfues between t he roots of the back- teeth, when they happen to penetrate the antrum. Some¬ times a difeharge of matter from the noftrils takes place nm-rL . cularJy when.the patient lies op the fide oppofite to^he tumor. ine dlfeare . may ante Tom cold, or whatever produces in¬ flammation m general ; but the moft common caufes are violent fits of the toothach, occafioning exceffive pain and inflammation o^the membranes of the nofe and antrum ihc cure is performed by giving a free difeharge to the COE- 144 Ranuta* P!afe 438. S U R o contents of the tumor: and this is done in two ways; either bv estraftine one of the two anterior great molares, which are fiuuated'under the antrum, and making a perforation with a round trocar (fig. 49*) through the hottom of the Socket; if this has not been already perforated by the tangs of the tooth or eroded, in which cafe the matter will pais out immediately after the extradion : or the perforation may be made by the iuftrument reprefented in fig. 50. thro that part of the antrum which projefts outwardly o ver the molares. As moft people wiih to avoid the pulling ot a tooth, when it does not appear to be abfolutely neceffary, the perforation is commonly made in the way lait mentioned. Some au¬ thors, however, objed to this, as not giving a fufficiently depending opening to the matter. As foon as the matter is difeharged, a plug may be introduced into the perfora¬ tion, which may be removed frequently to. allow the matter to pafs out, and to admit aftringent folutions of bark, &c. to be occafionally thrown into the cavity of the antrum. I n this way a cure is obtained, if the bones be found ; hut “ they are carious, it is impoffible to exped a cure till the difeafed portions of the bone exfoliate and .be removed. When cloated blood is formed in the antrum, it is to be re¬ moved in the fame manner. Sometimes the tumor of the cheek is owing to a fwelling of the bones, and no matter is found in the antrum : In that cafe the operation does harm. No external application has yet been difeovered for removing ; fuch a fwelling, though a long continued courfe of mercury has been found to be of fome fervice. E R Y. Sect. IX. Divifion of'Funum Ltngutt. Chap. XVI, Divifion o| . ... Fnenum •Sometimes the frsenum linguae extends to the point*of Lingu*. 'the tongue, and tying it down ‘f whereas, in the natural ftatc, V"" it ends about one-fourth of an inch farther back. When -this is the cafe, it is to be divided, guarding againfl wound- nng the neighbouring vefiels, or the ends of the lalivary "duds. The divifion may be made with a common fcalpel, but ft ill better with a pair of very fliarp feiflars with bhuit ^ The child being laid acrofs the nurfe’s knee, the furgeon (hould open the mouth, and raife the. tongue with the two firft fingers of the one hand, while with the other he intro¬ duces the feiffars, and divides the fraenum in the middle, and as tar back as is neceffary. Sect. X. Of Enlargement of the Tonfilt and Uvula Hi Sect. yil. Of Ranula. This is a tumor under the tongue, moft frequently owing - to an obftrudion in one of the falivary duds. Sometimes it contains matter like the fynovia of the joints, fometimes a fatty matter, now and then ftony concretions, but moft; com¬ monly a fluid like faliva. It often acquires fuch a fize as to prevent fucking in infants, or maftication and fpeech in adults. When the perfon attempts to fptak, he only , makes a croaking noife: hence the name of the difeafe. The beft mode of treatment is to lay the tumor fully open by means of a fcalpel or large lancet, to evacuate its contents completely, and then to wafti the cavity with any mild fluid, as milk and water. If the fore be difficult to heal, tindure of bark or other aftringents may be ufed. When the tumor is obferved to be filled with a fatty or any other firm fubftance, it ought to be removed entirely. The only application neceflary in the time of the cure, is the frequent injedion ot milk and water, or any other mild fluid, by means of a fyringe. Sect. VIII. Ulcers •within the Mouth* When ulcers of the mouth arife from a general affedion the fyftem, this muft be removed before a cure can be ex- peded. When they originate from fliarp points in the teeth, thefe are to be filed off, and fome aftringent folution taken occafionally into the mouth. Notwithftanding thefe -and other remedies, the fores fometimes becomes worfe, dif- charging a thin fetid fanies, attended with much pain, and putting on every appearance of cancer. In this fituation, ex¬ tirpation is the only thing that can effed a cure. If the fore be only fuperficial, it may pretty readily be extirpated; but when deep-feated, it may fometimes be neceffary to cut through the whole fubftance of the cheek, and heal the fore by the hare-lip future. When the tongue is the fub- jed of operation, the operator ought to be ready to take up the bleeding vcffels by the tenaculum or the needle. A- dong with ligature, it may be neceffary' to ufe aftringent gargles, or a mixture of vitriolic acid in water. If thefe JLail, the potential or even adual cautery mull be ufed. The tonfils fometimes grow fo large and hard as to be-My come incurable, and even to threaten fuffocation. The™ tumors here have been commonly confidered as to be of feirrhous nature ; but they are neither attended with {hoot¬ ing pain, nor are they apt to degenerate into cancer ; neither do fwellrngs return after the tonfils have been extirpated: hence they ought not to be removed till by their fize they impede deglutition or refpiration ; but whenever they do this, they may be removed with fafety. The only proper method of removing them is that by ligatures, which are not only void of danger, but feldom fail to perform a cure. If the bafe of the tonfil be fmaller than the top, the liga- ture is to be ufed as for polypi in the throat; but however broad the bafe of it may be, much difficulty will feldom oc¬ cur in fixing it, for the fwelling is always very prominent. In difeafes of this kind both tonfils are generally affe&ed; but if the removal of one of them forms a fufficient paffage for the food, the other may be allowed to remain. When, however, it is neceffary to extirpate them both, the inflam¬ matory fymptoms produced by the extirpation of the firfl ffiould be allowed to fubfide before any attempt be made to remove the other. When the form of the tonfils happens to be conical, fo that the ligature would be apt to flip over their extremi¬ ties, Mr Chefelden has recommended a needle (fig. 56.), with an eye near the point: a double ligature being put into the eye, the inftrument is to be puftied through the centre of the bafe of the tumor, and the ligature being.laid hold of by a hook and pulled forwards, the inftrument is to be withdrawn ; then it is to be divided, and fo tied that each part may furround one half of the tumor. This method however is fcarcely ever found to be neceffary. Enlargements of the uvula, from inflammation or other caufes, may generally be removed by the frequent ufe of aftringent gargles, as of ftrong infufions of red rofe-leaves or of Peruvian bark. But when thefe fail, and the enlarge¬ ment is fo conliderable as to give great uneafinefs by impe¬ ding deglutition, irritating the throat, and fo caufing cough» retching, and vomiting, extirpation is the only thing upon 1(1 which any dependence can be placed. Excifion is the rea-j7«irpi^ dieft method when the uvula is only elongated ; but whenoftnet- the fize is confiderabk, dangerous hemorrhagies fometimesk attend this method; on which account a ligature is pre¬ ferable. The operation may be readily performed by thofe- of the common kind; iome prefer the curved probe-pointed biftoury. , In performing the operation, the fpeculum oris (fig. j?-/ is neceffary to keep the mouth fufficiently open, and the uvula fhouid be laid hold of by a p*ir of forceps or a final hook, fo as to keep it firm, and prevent it from falling int0 the throat. After the operation, if the bleeding be con/v derable, it may be checked by aftringent gargles, or by touch- Chap XVII. S U R Scarifying touching the part with lunar cauftic ; but this will feldom ine! tiri r neceiFary. the' Throat. When a ligature is to be employed, it may be readily » y— done according to the method recommended in the extir¬ pation of polypi. A double canula with a ligature may be paffed through the nofe, or the ligature may be applied according to Chefelden’s method in extirpation of the ton* Ills. Imperfora¬ ted mea¬ tus audito- i'ius txcer- nus. i r 246 (Extr^ne- «us bodies impaled ! ia the ear. Sect. XI. 0/fcar'ifymg and fomenting the Throat. Is inflammatory affe&ions of the throat, the means com¬ monly employed are gargles, fomentations, fcarification, or top-bleeding. Gargles are ufeful for cleaning the fauces from thick mucus or other, fordes; they may likewife be ufeful in cafes of ulceration. In relaxation of the parts, they are emnloyed to advantage when made of allringeat materials. Fomentations may be of forne ufe when exter¬ nally applied ; but the fleam of water, &c. drawn into the throat, by means of Madge’s inhaler (fig. c8.), is preferable. Sometimes it is neceflary to draw blood from the part af¬ fected. Here recourfe may be had to fcarifying with a common lancet, the tongue being depiefied with a fpattila. It may be (till more readily done by the fcarificator (fig. 59). After a fufficient number of puntlures have been made," the flow of blood may be promoted by the patient’s frequently applying warm water to the punftures. When abfeefs forms, notwithftanding the ufe of thefe remedies, the matter may be difeharged with the icarificator already mentioned. Chap. XVII. Of Difeafes of the Ear, and Operations performed upon it. Sometimes a thin membrane is fpread over the mouth of the external pafiage, while at other times a confiderable pai t of the paflage is filled up with a flefhy looking fub- ftance, occafioning deafnefs. When the firft cfrcumftance occurs, the flein is eafily divided by a limple incifion, and the accretion of its fides may be prevented by a doffil of lint or a bit of bougie inferted between the edges of the wound, and daily cleaned and returned till the part be render¬ ed callous. When the other caufe is prefent, the incifion muft he conti¬ nued cpniiderably deeper, till the reiiftance be removed, or till the inflrumerit reach near to the membrane of the tympa¬ num, when the operator fhould defifl, left the membrane fhould be wounded ; then the lame kind of treatment may be followed as in the former cafe. The proper time for perform¬ ing the operation is when children ufually begin to (peak ; for previous to this the patient may be too weakly to bear it, and artei this Ipeech would be impeded. Sometimes the meatus externus is entirely wanting in the temporal bone. 1'or this an opening through the maf- toid procefs has been propofed ; but the operation has not been performed, at leaft in this country. Children fometimes pufh hard bodies into their ear, or different kinds of infeCts occafionally creep into it, fo as to caufe coniiderable uneafinefs. Subftances lying near the outer end of the paffage may generally be extrafted by the fmall forceps reprefented in (fig. 60.) ; but round, hard bodies iituated deeper in the paflage are more readily re¬ moved by a crooked probe. When infeds are deep feat- ed in the ear, they ought firft to be killed, by filling the paffage with oil, or any other fluid which proves noxious to W'thGut, hl?rtln3 the tympanum. They may then of a fyrJnge Ut by inJe-e of a moderately aftringent nature, as a weak folution of faccharum faturni. A little of this may be dropped in two or three times a-day, but it is ftill better to ufe a fy- ringe. If the difeharge has continued long, it may be proper, in addition to the other applications, to keep open a imall blifter for 1'ome time in the neck, arm, or wherever it may be thought moft convenient. It fometimes happens, particularly in old people, that, from expofure to a ftream of cold air, the tympanum becomes affefted, and a noife is heard by the patient like the rulhing oi water. In other cafes the’patient is incapable of accu¬ rately diftinguithing the words of feme perfons fpeaking in a loud tone of voice ; or, in mixed companies, he hears on¬ ly a confufion of founds. Complaints of this kind frequent¬ ly originate from a relaxation of the foft parts of the tym- panuni; and though a complete cure is not very frequently performed, yet coniiderable advantage is fometimes derived from the ule of hot ftimulating oils,andfrom keeping the part warm at the fame time with a little wool. When deafnefs arifes from affections of this nature, fome afliftance may be derived from collecting the found, fo as to make a ftronger imprefllon upon the internal ear. A variety of inllruments have been invented for this purpofe. Some ufe a convoluted tube as is reprefented in fig. 62, (fee Trumpet); others a fort of cup, fig. 63. which is concealed under the hair, and fixed to the head with (traps. In fcrophulous habits, fuppurations fometimes occur in the neighbourhood of the ear, and penetrate into the exter¬ nal paflage, or into the tympanum itfelf; after which it is not unulual for the fmall bones of the ear to lofe their connec- t»ng membrane, and to be difeharged along with the matter, and for caries to enfue in the tympanum ; in confequence of which a high degree of deafnefs is produced, which can never be removed. In fuch a fituation little die can be attempted than to preferve the parts clean and free from fmdl, which is readily done by injeCting a little warm milk and water morning and evening by means of a fyringe. If this be ne- gleCled, the matter from the carious hones is apt to become ' offenlive ; and it commonly continues till the difeafed parts are either diffolved and difeharged, or probably during the life of the patient. Befides the affeClions which may arife in the meatus exter- nus, and maybe the caufe of deafnefs, others may occur innf rhe Eu- or about the meatus interims or euftachian tube, whichflachian may have in part the fame effed, though by no means intjbe' the fame degree. Inflammation and its confequences may originate U R g S Tht Wry oricinate in the cavity of the tube, or fwtlbngs or ulcers ‘K. 7 -"Srihroat may Jc& it fo as to oaufe fome degre of , deafnefs When this is the cafe, it is practicable to mt - duce a pipe, fig. 64- crooked at the extremity, through the mouth or nofe, and then to injeft into the mouth of the euilachian tube any mild fluid which may be thought hmft for the purpofe, though no great dependence is to be p.attd v<. "Tormerlv piercing the lobes of the ears was fometimes of P"h'ri''..ornmc,1,l,(]l„ complaints of the head, and was confldered lobe, ■tthcas a chirurgical operation; blit it is now never pradtifed, eats. Iinlefs for the fake of ornament. As the fubftances fufpend- cd at the ears are fometimes fo heavy as to tear down the rarts, the perforation Ihould be made as hijh on the lobes Scar’ be done with propriety, and care ihould be taken that the perforations be made exactly m the corre ponding parts of the ears. Previous to the perforation the lobes may be marked with ink ; then the patient being featen, the lobe of the ear ihould be ftretched upon a piece of cork tne lope oi uic i . t Ar- placed beneath it, and perforated with an inftrument, $• The cork is then to be withdrawn with the point of the in- i lie COTK In rucii c, , ri ftrument flicking in it: A fmall piece of lead, or filver, or ■rold-wire, is now’ to be inferted into that part of the inurn¬ ment which remains in the ear, and on being drawn into the perforation, the wire is to be left in it. By rubbing it with oil, and moving it daily, the paifage will foon become callous, and fit for receiving the ornament intended for it. Chap. XVIII. Of the Wry Neck. 252 Elites of wry neck. Wry neck may be owing to different caufes ; as con- traaion of the flcin in confequence of burns, or other kinds of fores ; relaxation cf the mufcles of one fide of the neck, particularly the maftoid, while thofe of the other fide con¬ tinue to aft wdth vigour ; preternatural contradlion of the mufcles of one fide of the neck, the others having their ufual power ; or, a bend in the vertebrae of the neck. _ When the difeafe is owing to a contraction of the flan, this is to be divided through the whole of the contracted part, guarding againft cutting the external jugular vein. Treaiunen?.When the contraaion of the maftojd muicle is the caufe of the difeafe, the mufcle fiiould be divided by gentie itrokes, io as to run no rifle of wounding the great veffels fituated under it. When an incifion is made either with a view to divide the mufcle or the fkin, the head is afterwards, by means of a machine (fig. 66.), to be kept in a proper pollure during the cure until new granulations form andfill up the empty fpace. When the difeafe is merely owing to a curve of the bones of the neck, the fame kind of machinery may be ufeful with that recommended for cure in the other parts of the fpine. But fometimes the difeafe arifes from an affeaion of the bones of a more ferious nature. Here the difeafe in the vertebne commonly begins with a flight pain, which gradually be¬ comes worfe, and the head is turned over to the found fide. As the difeafe becomes worfe, a fulnefs can be obferved very painful to the touch; and moving the head becomes fo dittreffing as to be almoft impra&icable. The only me¬ thod which has been found to be effe&ual in this cafe, is the infertion of a pea-iffue on each fide of the tumor, and retaining it till the pain and itiffnefs are entirely removed. Chap. XIX. Of Bronchotomy and Oefophagotomy. 354 Broncho* tomy. The operation of bronchotomy is an incifion made in the trachea, to make way for air into the lungs, when refpira- tion is obftrudted to fuch a degree that life is in danger. If the patient’s breathing be already flopped, the operation ought to be done with the greatell expedition ; uiing any G E R V. Chap. XIX inftrumeot which will mod readily make an opening in the «roKh!% trachea, as the delay of a few moments will often put period to the perfon’s exiftence. Experience has fhown,^ S01* indeed, that in by much the greater number of cafes, by a —^ total iloppage of reflation for only five or fix minutes, life is irrecoverably deitroyed. In performing the operation, where, from die nature of the cafe, fufficient time is allowed, the patient is to be laid on his back upon a table, and properly fecured by af. fiftants. A longitudinal incifion is to be made, about an inch and an half long, through the flcin and cellular fubdance ; beginning at the under edge of the thyroid cartilage ; the flerno-hyoid and thyroid mufcles arc then to be feparated; the thyioid gland is to be avoided as much as pofiible, on account of its vafcularity. As foon as the. trachea is laid bare, the bleeding-veffels, to prevent coughing, are to • be fecured ; then, with a common lancet, a pun&ure is to be made as high as may feem pra&icable between two rings of the trachea, of fuch a fize as to admit the introduftion of a double canula (fig. 65.), large enough to allow the patient to breathe freely, and of Inch a length as neither to be in danger of flipping out, nor of irritating the back part of the trachea. Such a canula has long been recom- mended by Doctor Monro in his courfe of furgery. Pre. vious to the introdu&ion the canula may be put through feveral plies of linen comprefs ; or thefe may be full flit half way down, and applied fo that any of them may be removed and replaced at pleafure. I his double Ca¬ nute is to be fixed by a flrap round the neck ; and when mucus obftru&s the pafiage of the inftrument, the inner tube can be withdrawn, cleared, and readily replaced ; while the patient is, during this time, breathing through the outer one ; and by means of a ferew the tubes can be regulated according to the motions of the trachea. After the canula is fixed, it ought to be covered with a piece of muflin or crape, to prevent the admifiion of duft, mfeils, &c. As foon as the caufes inducing fuffocation are removed, the canula is to be withdrawn, and the flcin immediately brought over the orifice, and retained there by a flip of adhefive plafter. . 5Ji By ccfophacrotomy is underflood the cutting open the oefophagus, to allow fubflances flicking in it, and which^ cannot be extra&ed otherwife, to be removed. It is only to be done, however, in cafes of the moft extreme danger, as it is attended with much hazard ; and there are only two in (lances yet on record of its having been performed with fuccefs, though there are feveral inftances of wounds in the cefophagus being healed. ri he operation may be rendered neceflary, where ebllru&ions of the oefophagus become fo complete as to prevent the paflage of nourifhment into the flomach, or of air into the lungs. But it is evident, that when the obflruAing caufe is in the under end of the oefo* phagus, any incifion becomes ufelefs. In performing the operation, the patient is to be fecured in the fame manner as for bronchotomy, and an incifion made through the fkin and cellular fubflance as direftly oppofite as pofiible to the part obftrudled. If it be done with a view to remove an obflrudlion, the mufcles over the trachea are to be pulled to one fide, and the trachea to the other, by means of a blunt hook ; by which the cefo¬ phagus will be brought into view. If the obllrudled part now come in fight, the incifion is to be made diredlly upon the obftrudting body, which is to be extradled by a pair offma'* forceps; but if the obftrudlion happen to be farther down than we can with fafety have accefs to the cefophagus, the incifion is to be enlarged as much as poffible, that the forceps may be able to reach and extradl it. When the operation is performed, the wound will be difficult to Chap, Sore Nip. pies, XX, SURGERY. t47 heal, as the Tides of it will be frequently feparated by dropfy in other parts of the body ; but the affe£iidn is often Pancen- the action of deglutition. On this account as great a de- local, and it is then chiefly that advantage is to be derived of rlle gree of abftinence as poflible is to be advifed ; and nothing from an operation. Befides, in the two great cavities of, °rax‘ but nourifhing liquids, in fmall quantities, are to be allowed, the thorax, colledfions of water* are frequently met with in The patient flrould be prevented from moving his neck; and the pericardium, and are faid to be fometimes dilcovered the wound is to be healed as foon as poffible by the fame between the layers ol the anterior mediaftinurn. The dif-Svmpt img „7 fame methods which are uled with wounds in other parts of the body. On the other hand, if the operation has-been done for the purpofe of conveying nouriflrment into the ftomach, when the patient was diftrefled by a tumor either in the cefophagus itfelf or in fome of the neighbouring parts, it will be neceflary to keep the wound open during the con¬ tinuance of the tumor, or the life of the patient. Chap. XX. Of Sore Nipples. Women are more generally affedted with fore nipples in fuckling their firil child than at any period afterwards. This may, in fome meafure, be owing to the fimllnefs of the nip¬ ples ; but very o'ten it arifes from their being unaccuftomed to the irritation of fucking. In fome cafes, the nipples are fo flat, and fo much funk in the bread, as to render it difficult for the child to lay hold of them. Here affidance can fometimes be given, by the mother preffing back the pro¬ minent part of the bread, fo as to make the nipple project between two of her fingers. Should this be infufficient, the nipple may be made to projeft by applying to it a dout child feveral months old : but when this cannot be done, bread-glades, fuch as fig. 68. may anfwer the fame purpofe. By applying thefe to the nipple, and fucking out the air, the child will commonly be enabled to lay hold of it. The nipples at this time are liable to excoriations, cracks, or chops; which, though not attended with a for¬ midable appearance, are frequently more didreffing than large ulcers. Mild, adringent, and drying applications are mod to be depended upon in fuch c'omplaints; r.s port wine, brandy properly diluted, or lime-water; all ot which ought to be applied warm. After bathing the parts with any of thefe, the nipple diould be covered with unguentum nutritum, or Goulard’s cerate ; the fird of which is confidered as bed. Even a little foft pomatum fre¬ quently rubbed upon the part, and covered with a foft linen rag, is fometimes found to give conlideiable relief. But the nipple diould be perfe&ly cleared of thefe applications before the child is laid to the bread ; and this may be done with a little port wine, or equal parts of brandy and vinegar. If proper attention be paid to thefe remedies, they will commordy be found to have the defired effeft ; — - J — - V. V..» i. - U V i 11 V, HILO eafe is marked by the following fymptoms : There is a ienfe?f fillids be- of weight or oppreflion in the thorax, and difficulty of‘"s c0'^- breathing ; the patient has frequently a more uneafy fen-e ’ fation in one fide than in the other ; has fudden dartings du ring deep, with a fenfe of fuffocation ; is troubled with a frequent dry cough ; the pulfe is fmall and irregular; the fkin diy, and the urine fcanty. With thefe fymptoms there are commonly other marks of dropfy; and the patient fometimes, upon any fudden motion, is ienfible of an undulation within the ched ; and when the quantity of water is confiderable, the undulation will even be heard by the bydanders, if the body be fmartly agitated. For this purpofe, the patient’s body fliould be uncovered while under examination ; and the furgeon fhould place his hand upon the bread near the dernum; then an affidant ought to raife the patient fuddenly from an hori¬ zontal to an eredt podure, or to fland behind the patient and make fudden jerks; when, if water be prefent, the undulation will be felt ; but it is neceffary to guard againd being deceived by the nolle fometimes made by the contents of the domach. When the water is collected in one fide only, if the difeafe be of long danding, for the mod part that fide is more prominent than the other. If the water be in the pericardium, the fymptoms are nearly the fame as thofe above enumerated, with this difference, that the pain is ge¬ nerally felt behind, and to the left fide of the dernum ; and the droke of the heart is as if buried in water, while an undulatory motion has been faid to be felt oppofite to the anterior extremities of the child, fourth, and fifth libs* 8 In the treatment of this difeafe, little advantage can be internal re¬ derived from internal remedies. Squills, cream of tartar, medics of mercury, and digitalis, are upon fome occafions attended^tt^ea^va:i" with advantage ; but the only method from which we cantase* expedt any degree of fuccefs is the removing of the water by an operation, which Ihonld be performed as foon as there is reafon to expedt that danger may arife from delay- ing it longer. The operation is done in the fame way as ffiall be afterwards deferibed in the cafe of empyema. Blood colledted in the thorax is always extravafated thro’ fome wound or rupture of the veffels of the lungs or thorax, leded in * , ' - - - j 'vuvio vi lungs ur uiorax. lecled in but it the contrary thould happen, another remains to be. The breathing becomes oppreffed, the motion of the heart the thorax. in i fri-i v f rs 4- , f 1. — “ . .1 . ' TT _ 1 1 _ 1 * 1 * 11 , — -156 l Fluids col- ) leded in . the thorax. mentioned, which, in different inttances, has given great relief: it confifts in the application of a thin /kin to the nipple, as the neck and part of the body of a fwine’s bladder with an aperture in it; which, being properly moiftened and fixed to the breaft, will completely pro- tedf it in the time of fucking. As long as the nipples re¬ main any way affeaed, fmall cups of glafs or tin are ufeful for retaining the dreffings, defending the nipples from the fridion of the clothes, and receiving any milk which may fall from the breaft. Chap. XXL Of Paracentefis of the Thorax. When either the aaion of the heart or of the lunn-s is impeded by fluids colkaed in the cavity of the pleura, a difeharge of thefe fluids by a perforation is the only chance the patient has for relief. The fluids which collea in the pleura are, ferum, blood, air, or pus. A cofledion of water «r ferum is frequently found in the thorax, combined with and arteries feeble and irregular, and all thcle fymptoms are more diftreffing than colled ions of other fluids. As it frequently happens, in cafes of this kind, that fome of the veffels of the lungs are injured, part of the blood is thrown up by coughing ; which, when confiderable, gives a temporary relief to the lungs and heart; and while this is the cafe, no operation is neceffary; but whenever the adion of thefe parts becomes much impeded by a great ac¬ cumulation of blood, a perforation ought to be made to difeharge it. When the extravafated blood is too firmly coagulated to pafs off by a perforation, the wound ought to be.made confiderably larger ; and if this be infufficient, injtdions of warm water ought to be thrown in, and allowed to remain for fome time, to promote the diffolution of the mais, which is afterwards to be evacuated. If the extrava- lation has been occafioned by a wound in the lower part of the thorax, a new perforation will be unneceffary ; an enlarge¬ ment of the wound will be quite fufficient. But if it be fituated in the upper part of the cavity, a perforation in the 2 middle 148 Paraccn- tefis of the Thorax. 260 Air rolteft ted in the thorax- SURGERY. Chap. XXI. , , , x Anr.p nnon the part where the colle&ion is fuppofed to be Paracen. mi-ddle and lateral part of the thorax ought to be made, done upon the p r , , _ , .u. tefu.f.,. 1 r jTn or a rin i6t Emphycm or pus col- }e£led in the thoiax that the blood may be freely difcharged. ^ In cafe ofanb being fraftured, or a veffel ruptured, the inciiion ought to be made as near as poffible to the part affefted, to allow the blood to efcape, and loofe pieces of boner, to be removed. The difcharge of air into the cavity of the thorax pro¬ duces fvmptoms little lefs alarming than thofe proceeding from the effufion of blood. In general they are, opprefhon in breathing : a tightnefs of the breaft, attended with pain ; inability to breathe in the recumbent p oft are ; afluftnng and fwelling of the- Face ; a feeble, and at laft an irregular nulfe : The extremities become cold, and cola fweats break out on the forehead. With thefe fymptoms there is fre¬ quently a fwelling over the external parts of the body, by air getting from the ruptured lungs into the common cel¬ lular fubftance ; and all thefe complaints increafing, _ the patient, if not quickly relieved, foon dies; fometimes in a few hours, with roai ks or fuffocation. ^ til u Air may be produced in the cavity of the thorax by wounds in the lungs, by mortification generating air in any of the thoracic vifeera, by evofion of ulcers, by lacera¬ tion in confequence of fradure in any of the bones of the We diftinguiih this from other colle&ions by the hidden the manrser of operating is this : Having pla- rhe opera- ced the patient in an horizontal fituation, as belt fuited to t;on of pa- prevent fainting, and to allow the water to run freely off, I racenteiis. - v r .1 , . ,, 164 Man •r of Plate the part to be perforated ought to be marked with ink; and the mod approved pait for the operation Teems to be at a point lying at nearly an equal didance between the um¬ bilicus and the centre ot the fpine of the os ilium, this be¬ ing mod out of the way of any of the vifeera, and fuffici- ently depending to allow the water to efcape ; and as the Ipleen is lefs frequently enlarged than the liver, the left fide is generally prefeired. Various means have been ufed for Applying an equal preflure in this operation. Some apply preflure by the hands of affiftants ; others ufe a broad piece of flannel, or other kinds of doth, flit a certain way from each end ; then the ends are drawn by affidants till fuffici- ent preffure is made. Broad belts are ufed by feme prac¬ titioners ; but one of the bed contrivances for this purpofe is the bandage invented by the late Dr Monro, (flg. yc.) Till very lately, a pundure was fird made with alancet, tnen a trocar of a round form (fig. 71.), and with a trian¬ gular point,' was condantly ufed : but the entrance of this indrument being always attended with difficulty and painJ a fiat trocar is now very frequently employed ; and that in¬ vented by Mr Andree (fig. 72.) feems the bed which has yet appealed, ’i he bandage being-new applied and drawn a htue tight, the part to be puinffured is to projedT a little over the edge of the bed'. 1 he operator fixes the head of the trocar in the palm, while the fore finger direfts the point of the indrument. He is then to pufh it forwards tiii he is fatisfied, by the want of refidance, that the end ot the canula has reached the cavity of the abdomen The perforator is now to be withdrawn, and the water allowed to flow as long as any of it can be taken off, the bandane be.ns- from time to time pulled to favour the difehame. But it the patient become faint, a bop for a few minutes ffiouM be put to the difeharge every now and then, by placmg the point of the finger upon the mouth of the ca- raua. If any o'f the vifeera happen to flop the flow of the water before the fwelling is much diminifhed, a blunt probe is to be introduced, but bent at the end, led it flip and0 : ,;rity -f the ?rbdomeri- Whtn the ferum is thick la wgr tin tf’ U imay fometl'mes be necdrary to introduce a * ger t-ocai than theonefirft employed. When the water does G E R Y. i49 not flowq becaufe it is colle&ed into cids, the canula is to Paracerr- be wu’thdrawn, and the wound covered with a pledget of-tejHut t‘ie Ample ointment. The operation may then be renewed im-^c <:rnen3’ mediately, or on the following day, upon the oppofite fide -v » of the abdomen, or in the mod depending part of the tu¬ mor, in whatever part ot the abdomen it may be placed. During the operation it is necedary to keep up a pref- fore on the abdomen, otherwife the patient w;ill be apt to fall into faintings from the weighc on the great veffels of the abdomen being taken off, and the finking of the dia¬ phragm fucceeding, in confequence of which more blood flow's into the inferior veflels than ufual, the fnperior ones are left too empty, and thus the regular progrefs of the circulation is interrupted. To obviate this, die preflTure mud not only be made during the operation, but be after¬ wards continued. As to the drefling, it has been already mentioned, that the wmund may be covered with a pledget of Ample ointment ; but between the fkin and the roller fome • recommend a piece of flannel dipped in brandy or fpirit of wine to be applied. 1 he bandaging in this manner mav even have fome effeft in preventing a return of the dii- order. When the water again collects, the operation fhould be repeated whenever the iwelling has acquired a coniider- able fize : and though this operation does not always ef¬ fect an abfolute cure, yet it fometimes prefcrves life a great many years, and even a comfortable one, efpecially if the wa¬ ters have been long collected. After the operation, practitioners advife the abdomen to be frequently rubbed with aftringent fpirituous" applica¬ tions. I his cannot be done for the firft two days after the operation, as it would then be imoroper to remove the bandages ; but after that time, they may be removed daily*, for about a quarter of an hour ; and camphorated fpirit of wine, or other applications w'hich may have a fnnilar effect, may be applied with ftronp- fridlion over the abdomen, the body being kept, during this period, in the horizontal fit-n¬ ation, and the bandage applied immediately after the fric¬ tion is finifhed. ~ bometimes, inftead of water, w'e find air contained in of Ty mpa'* the abdomen; and the inflation is of two kinds: Firft,mtes. that in which the air is contained in the inteflines; in which cafe the patient has frequent explofions of wind, with a fwelling of the belly frequently unequal. Secondly, wdiere the air is collected in the cavity of the abdomen ; and here the fwelling is more equal, without any ccnhderable emiffion of air. In both varieties of the difeafe the fwelling is more tenie than where water is contained, and the belly founds when ft ruck, and affords to the touch and preffure near¬ ly the fame fenfation as is received from a bladder filled with air. Qr theie two diforders the former is- by much tne moft common. Many extenhve practitioners have never met with an inffance of true abdominal tympanites. A few- well authenticated cafes, however, have occurred, where the air was coliedted between the containing and contained parts of tne abdomen. In fome of them the air was found to have efcaped by a fmall hole in the inteftines, from which it has been iuppofed that the other cafes were of the fame nature. When the fymptoms become urgent, there is as much neceffity for difeharging the air as for drawing off tne water in cafes of dropfy. The preffure and perforation ' are to be made in the fame manner as diredled for afeites* with this difference only, that a trocar of the very fmallefl: fize ought to be ufed; for by it the air can be as eahly difeharged, and the wound will heal more readily than when a large opening is made. After the air has been extrafted, the treatment ought to be nearly the lame as that reconu mended in cafes of afcit.es. CtlABi. i$0 Hern ire in general. s u Chap. XXIIL Of Hernia. Sect. I. Of Hernia in general a66 Deft n if'on «•£ a hernia. >67 Siruation and con¬ tents of her 16 S Their dif¬ ferent si amts. 269 Caufes v hich pro rdute them The name of hernia might with propriety be applied to every fwelling oceaiioned by the diflodgmeut of parts from thole boundaries within which, in a ftate of health, they are contained ; but the general acceptation of the term im¬ plies a tumor produced by the protruiion of fome pait or parts from the cavity of the abdomen. The parts in which herniae ufually appear are the groin, ferotum, labia pudendi, tlie upper and fore part of Die -thigh, the umbilicus, and different points between the inter- llices of the abdominal mufcles. If the fituation of luch ra- mors be various, the vifeera which produce them are Itih more fo ; inllances having occurred of the ftomach, pteius, liver, Ipleen, and bladder, being found to form their con¬ tents. But a part of the inteftinal canal, or a portion of the omentum, ate from experience known to be the moft fre¬ quent can fe of their formation. ^ From thefe circumftances of fituation and content i, ad the different appellations are derived by which hernix are diftinguilhed. Thus they are termed inguinal, ferotai^ femo¬ ral, umbilical, and ventral; from their appearing in the groin, feroturr, thigh, navel, or belly. When the tumor is confined to the groin, the hernia is faid to be incomplete, and is termed bubonocele; but when the fwelling reaches down to the bottom of the ferotum, the rupture is then fup- oofed to he complete, and the drieafe obtains the name of Jcrotal rupture, or efchlocele. Of thefe diforders the inguinal hernia is by much the moft frequent; next to that is the femoral. The umbilical is lel- dom obferved in men, or even in women who have not bern children. The caufes which tend to the produftion of hernia in its more ufual form are thefe: I. The containing parts of the abdomen we know to be elaitic and compreffible ; whatever, therefore, tends to pro¬ duce a diminution of capacity in the cavity of the abdomen, nurft occafion a proportional degree of rifle of fome of the contained parts being puihed from their natural htuations. Violent coughing, crying, laughter, or great bodily exer¬ tion, are attended with more or lefs contradfion of the ab¬ dominal mufcles, and particularly of the diaphragm ; and as the contraction of thefe mufclcs muff always diminifh the ab¬ dominal cavity, thefe caufes therefore are frequently found to be productive of hernia. II. Falls, in confequence of the derangement they pro- duce in the abdominal vifeera, from the fudden and violent fhock with which they are often attended, are not unfre* quently the immediate caufes of hernia. III. Perfons of a preternatural laxity of frame are very liable to hernix. The containing parts of the abdomen, from the want of a fufficient tone and firmnefs, are unable in fuch people to refill on all occafions the weight of the diffe¬ rent vifeera ; and they are therefore more particularly expo- fed to diiorders of this kind on the flighted application of any of the caules already mentioned. IV. Sprains are apt to induce a laxity of the part injured; and have therefore a limilar influence in inducing hernix with general laxity. V. It has been obferved that the people of thoie countries where oil is much ufed as an article of diet, are particularly liable to hernix. In whatever parts the parietes of the abdomen happen to be weakeft, thele various caufes will mod readily operate in producing hernix ; and accordingly we find, that defeents of the bowels ufually occur only in fuch parts. R G E R Y. Chap. XXII] In whatever fituation a protrufion of any portion of the Hernia:in intedines occurs, except in the cafe of the hernia congenita, general as all the vifeera are contained within the peritonxum, a ' portion of that membrane, it is evident, mud be carried ^ down together with the parts protruded; and m eve-ofrhelet. rv fuch inftance, it is this portion of the peritonxum which nial fac. goes down along with the gut, that is termed the/Wi/ 'lac- The fize of this fac is various m different fubjetts, and jn different flages of the fame diforder. On the firft appear¬ ance of the difeafe, it is commonly of no very confiderable fize, as fuch fweilings feldom acquire any great bulk at once : but by repeated defeents of the bowels, it comes to he puihed lower and lower, till in fome indances its bulk becomes very confiderable indeed ; and when in this advanced period of the diforder the fac happens to be laid open, it is found to contain either large quantities of omentum or intedine, and frequently large portions of each. As the peritonxum has this property in common with many other parts of the body, of thickening according to the degree of any gradual extenfion applied to it, fo in ma¬ ny initances the thicknefs and firmnefs of the hernial fac are often really adonifhing. .> 171 All the bad fymptoms which are found to occur in her-Caubf nix, proceed, as may be readily fuppofed, either froth ob-t^ ftru&ion to the paffage of the fxces when the intedinal ca-^,.^ nal forms the tumor, or from a doppage of circulation cafioned by ftri&ure on the ptolapied parts : fo that the at-™, tending fymptoms, it is evident, will be always more or lefs hazardous according to the nature of the parts fo protiu- ded. _, Thus, when omentum alone forms the fubdance of her¬ nial fweilings, as that organ does not appear to be fo imme¬ diately neceffary for life as many of the other vifceia, fuch tumors accordingly are not fo frequently produ&ive of bad confequences, at lead they are feldom in any degree fo ha¬ zardous as when a part of the alimentary canal is either pro¬ truded by itfelf or along with omentum. Although this, however, is in general the cafe, yet it does iometimes happen, that even an omental rupture is pro- dudfive of no fmall degree ot danger. When a drietuie fo complete upon it occurs as to occafion a doppage of circu¬ lation in the protruded part, mortification with all its bad confequences mud be the certain event: And befides,. the connexion between the omentum, domach, and other vifee¬ ra, is fuch, that a fudden defeent of any coniiderable portion of the former fometimes brings on vomiting, hickup, and other troublefome fymptoms : And ladly, although a rup¬ ture containing omentum only might not o^ itfelf produce any thing bad ; yet as the paffage through which the omen¬ tum has flipped mud of neceflity continue open fo long as that vifeus remains protruded, and as that circumftance alone mud, fo long as it continues, render it more eafy for a por¬ tion of gut likewife to get down, this of itfelf is a lufficient reafon for intitling even this fpecies of hernia to the ferious attention of praftitioners. But whatever the contents of fuch fwellings may be, as their remaining in fome inllances for a confiderable length of time without being productive of any bad fymptoms, mud proceed entirely from the circulation continuing to go freely on, notwithdanding the derangement of parts; fo, whenever a dri&ure occurs up the protruded viicera, fo-- ficient to produce either a doppage of the circulation, or of the fxcal contents of the alimentary canal, when a por¬ tion of gut forms the difeafe, the following in general aie the fymptoms which accrue. An eladic colourlefs fwelling is obferved at the part affec-Ens^ ted; a flight pain is felt not only in the fwelhng but, if part of the alimentary canal is down, an univerfal un'tolUl, ma. 274 £ Chap. XX11T. S U R Hernias in eafinefs is perceived over the whole abdomen; and this pain ? , ^eneral is always rendered worfe by coughing-, fneezincr, or any vio- —v——' j^nt exert;ioa< ']/he patient complains of naufea ; frequent retching; can get no difcharge by ftool ; becomes hot and reftlefs; and the pulfe is commonly fojnnd quick and hard. When the fwelling is formed entirely by a portion of gut, if no fasces be contained in it, it has a fmooth, equal fur- face ; and is ealily comprdhble, but inftantly returns to its former hze on the preffure being removed: but, in gut-rup¬ tures of long (landing, where hard fasces have colledted in the protruded bowels, conlidetable inequalities are deleted. When again the tumor is compofed both of gut and omen¬ tum, its appearance is always unequal, it feels foft and fome- what like dough, and -of courfe is not fo elaftic as when part of the inteftinal tube only is down ; for although, like the other, it is comprefiible, it does not fo readily regain its 4 27 a former dimenfions on the preflure being taken off. 1 Nevsr hap- It will be readily fuppofed, that the fymptoms we have f pen in o- defcribed never can happen from the prefence of omen- | mental her tum or.[y ; p()r although ftridture produced on a portion of omentum, even wheft no part of the inteftinal tube is down, does now and then occafion a good deal of dilirefs, fuch as pain in the part, (icknefs, vomiting, and twitching pains through the whole belly ; yet no obftrudtion of the gut ever occurs from this, and of courfe none of the fymp¬ toms ever prove fo alarming as when any part of gut is af- fefted. If thefe fymptoms we have defcnbed as being pro¬ duced by a ftrangulated gut, are not now obviated by a re¬ moval of the ftricture which produced them, the naufea and retching terminate in frequent vomitings, firft of a bilious, and afterwards of a more fetid matter; the belly becomes tenie; the pain turns more violent ; a diftreffing con- vidfive hickup comes on ; the fever, which before was not apparently of much confequence, now becomes very for- miuaole ; and a total want of reft, with a verv difagreeable ftate of anxiety, continues through the whole courfe of the complaint.--Thefe fymptoms having gone on with violence lor iome time, the patient is at laft commonly relieved in a fU'.cien bom all manner of pain ; and then he flatters him- felf that all danger is over. But indead of that, the pulfe, from having been hard and frequent, becomes languid and interrupted ; cold fweat breaks out over the whole body, but tipecially on the extremities ; the eyes acquire a kind of languor; the tenfenefs of the abdomen fublides, and the fwelling of the part affe&ed difappears ; the teguments co¬ vering the parts, which before were either of a natural ap¬ pearance, or had fomewhat of a reddifh inflamed caft, now acquire a livid hue, and a windy crepitous feel is diftinguifli- ab!e all over the courfe of the fwelling. If the protruded parts have not of themfelves gone entirely up, their return is now in general eafdy effeaed by a fmall degree of pref- iure, and the patient then difcharges freely by ftool ; but the cold fweats inereaiing, the hickup turns more vio¬ lent, and death itfelf is at laft ufhered in by its ufual fore- runners, fubultus tendinum, and other convulfive twitch- ings. Thefe are the ordinary fymptoms of what is termed a Jlrangulated or incarcerated gut-hernia .* that is, when the parts protruded become fo affeded by ftridure as to pro¬ duce pain ; and do not either return to their natural fitua- ons on the patient’s getting into a horizontal pofture, or be lrnmedlatdy reP^ced by the hand; of a prac- on/vmin^r fuaT'0r a ftranKuIatcd hernia occurs, the the removal ^ is Cvident’ ^ confift in the Drotrulf ^ ftTnaUre whfeh Preventp the return of protrudea parts. It is that ftriaure which ought to be coandm<1 caufe of all the mifchief; aud udefs it (’Sjtnpton's of mortifi- ]cation of the inte- ftin e. .ure. G E R y. ,5r be removed, nothing effectual can be done for the relief of Hernias in the patient. genetal. Various methods have been attempted by pradfitioners y T"f for the removal of ftridlure in thefe diforders ; all of which may be comprehended under two general heads. I. buch as effedt a redudtion of the protruded parts, with¬ out the interpohtion of incilion or any chirurgieal operation properly fo called ; and, II. A divifion of the parts producing the ftridhire, fo as to a-lmit of a replacement of the deranged vifcera, conftituting what is termed the operation for the hernia. The remedies to be employed for accomplifhing the firft of thele are, a proper pofture of the patient, with the ma¬ nual afiillance of -a pradtitioner; blood-letting, ftimulating clyfters, opiates, the warm bath, and proper application* to the tumor itfelfi - If thefe fail, there is then no other- means of cure left but the operation of dividing the integu¬ ments, and replacing the vifcera. As loon as the afliftance of a practitioner is dtfired for Mediod o? the removal of fymptoms in cafes of hernia, the firft circum-rechlcmg llance requiring his attention is the placing of his patient in fuch a pofture as will moft probably favour the return the protruded parts. Placing the patient’s feet over the fhouiders °f another perfon, while his body is allowed to hang downwards, and caufing him to be a good deal jolted about, has on lome occafions anlwered when other means have failed. 'I he furgeon Ihould at the fame time endeavour to afiift the return of the bowels, by means of gentle preffure with his hands and fingers. In the inguinal orfcrotal hernia, this prefiuie (hould be made obliquely upwards arid outwards to-» correlpond with the opening in the external oblique mufele;. 111 the femoi?.l hernia it ought to be made directly upwards;; in the umbilical and ventral hernia diredly backwards. i he fvvelling (hould* be gralped with one hand at the bot¬ tom, while with the fingers of the other hand an attempt is. made to puTh gently the contents of the tumor into their place, always obferving that the parts lait protruded be firll reduced. This operation is by authors termed the taxis. When the means now mentioned liave failed, no remedy- affords more relief than blood-letting. The quantity to be • drawn ought chiefly to be determined by. the ftrength of the patient. J here is icarcely any difeafe, however, where fuch large quantities of blood can with propriety be taken from weak people. Blooding till the patient is in a ftate of deliquium animi,. is frequently known to produce a more effectual relaxation of the mufcles than can be done by any other means. On. that account it is fometimes advifed in cafes of hernia, and the pra&ice is now and then attended' with advantage. As an obftinate coftivenefs is commonly one of the molt alarming fymptoms of hernia, it has been a common prac¬ tice to exhibit a variety of ftimulating purgatives both by the mouth and anus ; but they are very feldom of much fer- vice, and m that cafe almoft univerfally do injury, by increa- hng not only the ficknefs at ftomach, but the tenfion and pain of the tumor. When they are to be employed, they ought to be thrown up by the anus. For this purpofe aloes and other ftimulating fubftances, but particularly tobacco- fmoke, are employed ; and although this laft remedy, which is to be thrown in by double bellows, &c. does not always aff as a purgative, it may be ufefully employed as an ano¬ dyne. Where an evacuation by ftool is wanted, it may in general be readily procured by the injeftion of warm water, in which a little Caftile foap is diffolved, in the proportion of a drachm or a drachm and a half of the latter to a pound of the former. Warm bathing is another remedy greatly extolled, either by general immerfion or local application. 152 Hernlae in generali 477 "Wh’ i! che operation i'or >c u- •cingthe iMeltme fliould he perfoi med 478 Method cf perfo m- ing it. S U R G by means of warm water put into ox-bladders covered with flannel, and laid acrofs the abdomen. To diminifh the fize of the tumor, remedies of an oppo- fite quality from thefe have been ufed; and though by feme this practice has been con fide red as hazardous, yet by others, particularly by the late Dr Monro and Mr Benja- min Bell, more advantage has been found from cooling ap¬ plications than from thofe of a different nature. Snow, ice, or cloths' dipped in a recent folution of fal ammoniac in water and vinegar, or cold faturnine applications, or cold water and vinegar, have been employed with advan¬ tage. If, notwithftanding thefe remedies, the difeafe be¬ comes worfe, and no probability remains of fuccefs, the di- viflon o! the parts producing the ftridture can alone lave the life of the patient. To determine the exaft time at which to proceed to an operation, has been confldered as one of the niceft points in furgery. In general, when every attempt has failed, and no repetition of the former remedies is likely to lucceec:, the furgeon ought certainly to proceed to the operation. A few hours, even when afliftance has been early applied, is perhaps all the time which ought ever to be confirmed in trials of this nature. But however neceflary this operation may be when a patient's life is in danger, as it is always at¬ tended with fome degree of hazard, it ought never to be pra&ifed where fymptoms of ftrangulation do not exiil. In that kind of hernia called chronic, the circulation of the part forming the hernia, as well as the penllaitic mo¬ tion of fuch parts of the alimentary canal as have been pro¬ truded, go freely and regularly on. There are many in- flances of larcge hernise falling down even to the bottom of the ferotum, and continuing there for many yeais, without producing any interruption to the ufual difcharge by ftool. All that can be done here is, to prevent any accumulation of faeces in the inteftine, by prelcribing a proper diet, and the occafional ufe of gentle laxatives ,■ and obviating any in¬ convenience which might ariie from the weight of the tu¬ mor, by the application of a proper trufs or fufpenfary ban¬ dage ; to warn them of the rilk to which they are conftant- ly liable, and to caution them againft violent exercife, parti¬ cularly leaping, and every fudden exertion. The trufs ought to be fitted exaftly to the part for which it is in¬ tended, for without the utmoll nicety in this refpedl, it mult always do more harm than good : for the foie purpofe of a bandage, in cafes ©f hernia, is to prevent effedtually the fall¬ ing down of fuch parts as have been newly replaced. If therefore th^ pad or boltter of the bandage does not bear properly againft the opening upon which it is placed, a por¬ tion of gut may flip out, and be materially injured by the prefture of the pad. Fig. 74. rqprefents a truis for an in¬ guinal or femoral hernia of one fide, fig. 75. a truis for the fame difeafe in both fides, and fig. 76.a trufs for an umbilical hernia. We fh?.U now proceed to deferibe the circumftances to be attended to in performing the operation for hernia in ge¬ neral. A table of convenient fize and height being placed in a proper light, the patient tnuft be fo laid on it as to re¬ lax the difeafed parts as much as poflible, and then fecured by proper afuftance. To leffen the contents of the abdo¬ men as much as poffible, the bladder ought to be emptied previous to the operation. An incifion is to be made with a common round-edged icalpel through the Ikin and part of the cellular fubflauee, long enough to allow the krkfture to be fully exqofed. The reft of the cellular fubftar.ee is then to be divided with the greateft attention. 1 hat part of the mufcle forming the ItriAure or ring muft next be laid diftindtly in. view. A fmall portion of the protruding fiac muft alfo be expofed j after which the directory (fig. 73. ) E R Y, Chap. XXIII. is to be raffed between the ring and the fac. A ftraight Hernia: ic probe-pointed fcalpel is now to be introduced into the groove of the directory, and by it the ring is to be dilated till the point of the finger can Lse introduced. The finger is here confidered as the fafeft dire&or ; for it being iafxnuated into the aperture in the tendon.immediately above the pro¬ truded parts, the point of the knife is ealily introduced upon it ; and by keeping the end of the finger always a little be¬ fore the knife, the opening may be enlarged to any necef- iary extent without rilk of wounding any of the contiguous Parts- - Bv the eafe with which the finger is introduced, the ope¬ rator will be enabled to judge when the ring is fufficiently dilated ; and if the ftrangulation was entirely in the ring, it will now be evident that every obftacle to the redudiion muft be removed, and of confequence that the prolapfed parts may be returned with little difficulty. If the patient be young, or if the difeafe has continued ?. conliderable time, fuch a degree of inflammation frequently eniues in the neck of the fac as to produce thickening and ftraitnefs ; fo that, after the fac and its contents’ have been entirely freed from the ftri&ure of the ring, the inteftines cannot be redu- ced. We judge this to be the cale when, after the ftridlure of the ring has been removed, tire parts prolapfed do not ex¬ pand into their natural fize, and farther, when they make re- liftance when we attempt to return them. In this cafe, the neck of the fac muft be opened with the utmoft caution, to avoid wounding the parts within it. If the herniary fac, under the ftraitened place of its neck, be thin and tranfparent, and there is little or no reafon to fufpeft an adhefion of the bowels to the fac, -tire bell me¬ thod, as Dr Monro, in his publication on the Burfie Mirco- fae, obf^rves, will be to make a fmall hole in the fac below the ftrifture, and then to introduce a fmall furrowed probe, and to cut caufioufly upon it. But if the fac be thick and dark coloured, and there is likewife a fufpicion that the bowels may adhere to it, the eafieft and fafeft manner will be to make the hole in the peritoneum above the ftri&nre ; then to introduce a common probe, bent near its point into a femicircle, with its point directed downwards through the ftrifture into the fac ; and upon the point of it to make, with great caution, another {mail hole ; after which we may either cut upon the probe, or introduce a furrowed probe, and divide the neck of the fac. Alter this, the bowels are to be returned by preffure up¬ on the fac, without opening it farther; and the fides of the wound in the (kin are to be brought together, and kept fo by means of flips of adheiive plafter, though Hitches made at the diftance of a finger-breadth from each other will ex¬ clude the air, and prevent the return of the bowels more ef¬ fectually. Over thefe are to be laid feveral fojds of char- pee, and the whole is to be fecured by a bandage adapted to the nature of the part. < 2‘9 The patient, upon being carried to bed, fhould be fo pla-TreW ced as to have the part upon which the operation was per-ahef* formed higher than the reft of his body, or at leaft as high as the fituation of the part operated upon will allow, in or¬ der to prevent a return of the difeafe. After the opera¬ tion, opiates are particularly ufeful, and ought to be re¬ peated as circumftances may require. It is likewife ne* ceffary that the patient be kept cool. In plethoric habits* blood-letting is proper, together with a rigid attention to low diet. A frequent ufe of clyfters and gentle laxatives, to keep the belly moderately open, ought not to be negiefted. When the conftitution has been previoufly much reduced* inftead of blood-letting and a low diet, a nouvifhing i'eg1' men is neceflary. The dreffings ought not to be removed till the third or fourth day after the operation, when the ' fides Chap. XXIIT. SURGERY. n H2trnmi!n the Wol’ntd wiI1. ^ fou,nd adhcn‘flg together} a ligature on the found parts prevLui to the removal of Herni* i fd ^ attention be paid to the fubfequent treatment, the thofe which are mortified j whilft the ends of the ligature ^n1er“!' fore will be generally healed in two or three weeks. Aa being left hanging out of the wound, the furgeon has it in foon as the wound is firmly cicatrized, a truft ought to be his power to remove them when circumftances appear to property fitted to the part, and ihould never, on any future render it proper. Thefe ligatures on the omentum, how- ’8a ef ljfe, be laidafide. . ever, are frequently productive of bad conlequencea. No Method of When the hernia is of long {landing, and when there is hemorrhagy of any importance ever occurs from a divifion fhe opT’a"8 reaif°Kn t0 think adl;efion8 ^ave taken place between the fac of this membrane, even in a found unmortified date ; fuch tion when ^nd b°weIs’ or that mortification has already begun, or that parts as have become gangrenous may therefore be freely adhefions fornf filaments run acrofs the fac and prevent the reduction, cut off, and the remaining found parts be afterwards, with. c°artStifi' Zr nn ^ ^ ^ ^ gUt ^ in, °Ut the ^^tion of ligatures, iafely introduced into the VZlkn Z ° Tm entfansIed fro1? a Part of Lthe omentum being abdomen. If a veffel of any fize in the omentum has been place. dov™’ a d'tterent method of operating becomes neceffary. divided, a ligature may be paffed above the veffel itfelf, and Pat,?t 18 rt0 ubC P ^ ^ al[eady d,lrefted- The the ends left hanging out of the wound ; the threads may be .,0 away at pleafure. When a rupture ha. make the {kin tenfe on the fore part of it, while with the fcalpel in the other he divides the {kin from one end of the tumor to the other. The cellular fubftance is by gentle ftrokes to be divided, till not only the ring, but the whole length ol the fac, is laid bare. An opening is now, in the moll cautious manner,_ to be made into the fac by flight {cratches, to avoid hurting any of its contents. . ^ making this perforation, which is confidered as the mceft part of the operation, confiderable aflxftance is obtain- ri*r\rv» >11V, ^C 1 /* 11 1 • o , . _ ea.j __ g . ’ . . rP ma thick, hard, and much enlarged, as in fuch a ftate no good port;™ of .here may be dlircaed. anfretuvned with the g“ into the abdomen. When the bowels cannot be reduced w,theafe the rmg ,s to be dilated by the blunt-pointed fcalpel m the manner already direfted. After returning the r„ 1° fCr "““‘Y of the abdomen, if has been propofed by fome authors to naA ^ r " enj lt1 has 13 commonly firmly connected with the fpei neck L fac, kitfa '“'"fr‘ 1! bchi"d’ t,“3 J13" °f “ touched. neck of the fac, with a view of prfturing8: re^nof £ fides, fo as to prevent a future defeent of the bowels : and have0bee°n or ^f d ^ aftUal and P°tential cauteries, have been propofed ; but as none of them yet attempted W been found fufficiently to anfwer the purpofe, the only thing- that can be recommended is a well made trufs. 7 fuppuration can take place, and as its prefervation cannot be in any degree ufeful, fuch parts of it as can be cut away with propriety ought to be removed. All the lateral and fore parts ot the fac may be cut off with fafety ; but as it is commonly firmly connected with the fpermatic veffels a5t Uiing mat can be recommended is a well mad^ tn.fa • i j ^ : V tae general iymptoms ot Treatment When the bowels are aftually in a ftate of ra ' ^ enn^e^ated, and by a loft and fornewhat Md.en the the returning of fuch mortified parts might be am^dT’ 'fh3 d'1 'C WC beginning 111 the groin, and defending by bowels are the verv word P.. ght be tended with degrees into the ferotum in men, and into th, lak.Y Sec-t. II. 0/ Bubonocele, or Inguinal and Scrotal Hernia. T his fpecies of hernia is formed by a protrufion of fomeo„ aS* of the abdominal bowels through thi rings of the cxterSflS™ oblique mufcles. It is known by the general fymptoms ofceic- hrr r,?dj 5nume!;ated, and by a loft and fomewhat bowels are the verv wofft Vo ( PartS miSht be attended with in a Hate ofn ff y W} oa{eq«ences, a great degree of caution is Saflgrene> as the exrif!h f He °m.a,tu'n ™ a mortified ftate. With much Hflr r ?°Tn °f tlusfubllaace is not attended difeafed parts ’ f iC coPimon Pra . c ftinguifhed i ja are abfent : From venereal bubo, by the prefence ot from other 1 — - . ^ * i t * j_ -.11 CiTrr.111 n rq tidtaies. “comprembie hardnefs with which all fuch fweUin.s are at firft attended, and by the fluidity of matter which m the fuppurative date is always obfervable : From hernia humeral is, or fwelling of the teftes, by the abfence o the hardened and enlarged date of the tedis and epiaydimus, and likewife of the pain, the tumor of the tedicle being re¬ markably heavy in proportion to the bulk, the fpermatic procefs being commonly free from the fwelhng. In the her- nia humeralis alfo the intedines are unobdniaed, and t general fymptoms of hernia are wanting. From the hydro- cele of the tunica vaginalis teftis, by the tumor generally feel¬ ing more fmeoth to the touch than in hernia, by t e we ,nrt here beginning in the under partof the fcrotum and afcendmg, by the fpermatic cord being always free and diftincl, and by a fluauation being evident. From hydrocele of the fpermatic cord, fometimes with much difficulty, and therefore it re¬ quires here particular attention. In every cale of tumor m the tedes, where the mod perfea certainty is not obtained, and when it is necedary to have recourfe to an operation, the furgeon ought to proceed as in a cafe real hernia. Treatment. The treatment of bubonocele is the fame with that already advifed in the treatment of hernia in general, only making allowance for the fituation of the difeafe. In attempting the reduff ion by means of the hand, the preffure (hould pe obliquely upwards and outwards, correfponding with the rinf is to be removed in the manner already deferibed; and as' n‘a’ the tendon completely furrounds the neck of the fac, the ^ undure may be cut wherever it can be moft readily dilated. A radical cure fimilar to that for the other fpecies has been pi o poled, but with as little probability of fuceefs. 290 Ventral rupture is a protrufion of fomfe of the bowels Ver,t'ral through the interftices of the abdominal mufcles, and is^™^ moil frequently obferved in fome of the parts moll contigu¬ ous to the linea alba. The treatment of this fpecies of dif¬ eafe is exa&ly the fame with that of exomphalos. Hernia of the bladder of urine, though lefs frequent Cyftic her- than that of the omentum or inteflines, is not very uncom-nia’ or«'up-> mon. The fituation in which it occurs is in the groin,ture ttie through the •abdominal ring, in the fore part of the thigh, under Poupart’s ligament, fo as to form inguinal or crural hernia. Inflances have likewife occurred of the bladder be¬ ing pufhed into the perinamm. Sometimes it occurs by it¬ felf, without any complication; at other times it is accompa¬ nied with inteflines and omentum, both in inguinal and f emo¬ ral hernias : when complicated with bubonocele, the protru¬ ded part of the bladder is fituated between the intefline and Ipermatic cord. . rbe. ^ua| fyraptoms are a tumor, attended with fluaua-SynSom*. tion either in the groin, in the fore part of the thigh, or perinaeum, which generally fubfides when the patient voids urine. When the fwelling is large, before water can be made with freedom, it is commonly neceflary to have re- courfe to preffure, at the fame time that the tumor, when in the groin or thigh, is as much elevated as poffible ; but when the fweihng is fmall, and efpecially when no flridure is as yet produced, the patient generally makes water with fVc|at ea*e5 ar|d without any afiiitance from external preffure. When t the difeafe occurs without any complication, it is commonly owing to a iupprefiion of urine. In the diagno- fis care ought to be taken not to miftake it for a hydrocele. In recent cafes, the part protruding may in general be eafily reduced, efpecially it we attend to the fupprefiion of urine, which probably gave rife to the difeafe. A proper truf? ought afterwards to be worn for a coniiderable time. When the difeafe has been of long Handing, adhefion takes place betw een the bladder and cellular fubitance of the ferotum. In this cafe, therefore, as long as no fymptoms occur to render the operation neceffary, a fufpenfory bandage, fo fit¬ ted as effedually to fupport theproiapfed part*, is the only probable means of relief. ' Sometimes the bladder, owing to a fuppreffion of urine, Herma va ’ at other times part of the inteftines, have been found toginahL protiude through the vagina. In the former cafe a flu&u- ation of water is perceptible to the touch. I he reduction is made by laying the patient on her back with her loins fomewhat railed, and prefiing with the fore¬ finger from the vagina. Defoents may in future be gene¬ rally prevented, by evacuating the urine often, and by the uie of a peffary introduced into the vagina. Nearly the fame means are employed in reducing the intefline when it is found to protrude. Chap, XXIV. Of Hydrocele. Every tumor formed by a colledfonof water might with propriety he named hydrocele, but the chirurgical accepta¬ tion of the term implies a watery fwelling fituated in the icrotumor fpeixnatic cord. Hydrocele is either anafarcous or ency.ved. in the former, the ferum is chiefly diffufed in the cellular fubftance : In the latter, the water is colle&ed m a diitinct bag. The ferotum with its contents are liable to 0 t 6 S tr R JZcm, to both varieties of the aifeafej fo is the fpermatic cord with Hy Irocclc coverings. Scrotmn. Sect. I. Mafarcous Hydrocele of the Scrotum, ' As foon ^ water has collefted in any confiderable quan- Symptoms tity in the fcrotum, a foft, inelaftic, colourlefs tumor is ob- of thie dif- kfved over the whole' of it; imprefiions are eafily received eafe' and obtained for fome time ; the (kin at^rft preferves its na¬ tural appearance, and the rugae of the fcrotum are not much altered but as the fwelling advances, they gradually ddap- pear, and are at lad totally obliterated. 1 he iwelhng, from being at firft foft, and of a confidence fimilar to dough, by degrees turns more firm, and the fkin at lad acquires an un¬ natural white firming appearance. The tumor at lengt becomes large; and though originally confined to the Icro- tum, itat lad fpreads up the groin. I he penis l.kewile becomes affeded, and often fo [welled and didorted as to excite much inconvenience and diflrefs ; and although the fcrotum is compofed of parts which readily admit of dilata¬ tion, the tumor fometimes becomes fo enormous that it burds , , from one end to the other. Treatment. In the furgical treatment of this difeafe pundures made with the point of a lancet arc mod advisable, as large fcan- fications, in anafarcous habits, are iometimes apt to produce inflammation and mortification ; while fimple pundures rea¬ dily heal, and can be renewed with very little pain as fre¬ quently as may be neceffary : and befides, pundurcs are equally ufef ul with the incifions; for as the cells of the tum communicate freely, if the pundures he made through the fkin, the water drains off very readily, though not fo foon as by fcarification. Previo”s to the operation, befmearing the part wdth fome tough ointment of an inno¬ cent nature, and afterwards keeping it as dry as pofiibte by a frequent renewal of dry foft linen cloths, in order to im¬ bibe the moifture, is here a neceffary piece of attention. x The v/ant of this feems to be the caufe of much of the mif- chief which frequently enfues from operations of this kind. When fcarfications or pundures go wrong by beginning to inflame and turn painful, &c. a cold folution of faccharum faturni, applied upon foft linen, proves moft effedual in putting a flop to the farther progrefs o* the inflammation, and affords mofl immediate relief to the patient in the pre- fent diflrefs. Lime water, employed in the fame manner, proves alfo a very ufeful application. When, however, the diforder proceeds to gain ground hy a real mortification coming on, we fhould immediately have recourfe to bark and 196 other medicines ufually employed in fuch affedions. Sametimes- Although the anafarcous hydrocele, for the moft part, de- nwing to a pen^s Up0n a general dropfical tendency, fome inflances oc- iocaicauie. cur 0p a joca| cau(e producing a mere local dropfy of the fcrotum. Thus, it has been known to happen from fwel- lings in the groin and in the abdomen obftruding the paffage of the lymphatics. When this is the cafe, if tu¬ mors producing fuch obftrudions can he extirpated, no Other means will afford fuch cffedual relief ; but when they are fo deeply feated as to render any attempt for removing them improper, the pradice we have already pointed out of making pundures in the moft depending part of the tu¬ mor muff be employed with a view to palliate fuch fymp- toms as occur. It fometimes happens in fuppreffion of urine, wdiether arifing from ftridures in the urethra or from ftones impaded in it, that the urethra burfts, and the urine in this manner getting accds to the cellular texture of the fcrotum, an anafareous fwelling rifes imme¬ diately over the whole of it; nor does it commonly diminiflr till the caufe by which it is produced is removed. In order to prevent the formation ol finufes, which in G E R Y. Chap. XXIV. fuch circumftances will otherwife be apt to occur, an inei- fion fhould be made into the tumor, and carried to fuch a depth as is fufficient for reaching the wound in the urethra. nalisgJ Irk this manner a free vent will not only be given to the ti,, mine already diffufed, but the farther colledicm of it may —sn*i probably be prevented. If a ftone impaded in the urethra be found to be the caufe of effufion, it fhould be cut out; and if the obftrudion be produced by ftridures in the ure¬ thra, they muft be removed by a proper ufe of bougies The caufe being thus removed, if the habit of body of the patient is good, and untainted with any venereal or other general affedion, by dreffing the fore properly with foft eafy applications, the opening into the urethra will probably heal, and a complete cure will in this manner be obtained. But when thefe ailments are complicated with any general affedion, particularly with old venereal complaints, it fre¬ quently happens that neither mercury nor any other medi¬ cine has much influence in remoying them. Sect. II. Hydrocele of the Tunica Vaginalis Tejlis. In the healthy flate of the body, a fmall quantity of aqueous fluid is exhaled for lubricating the furface of the tefticle, the fuperfluous part of which is abforbed by veffels appointed for that purpofe. When the fecretion of this fluid is cither morbidly increafed, or its abforption diminilh- ed, a preternatural colledion of water is formed in the ca¬ vity of the vaginal coat, and hydrocele of the vaginal (joat The f'ymptoms are, a fulnefs at firft obferved about inferior parts of the tefticle, and moft remarkable when the^ patient is ered, becoming gradually more tenfe as the difeafe advances ; the tumor by degrees changing from the globular to the pyramidical form; no degree of pieffure making the fwelling difappear at any period of the difeafe. In the early part of the diieafe therefore, if it be not com¬ bined with hernia, or with a hydrocele of the cord, the fpermatic pvocefs may be diftinclly felt, becaufe the [well¬ ing does not extend beyond the fcrotum. In its more ad¬ vanced ftate, it cannot be diftinguilhed : the weight of the tumor now drags the fkin of the neighbouring parts fo much as to caufe the penis almoft to difappear; and in this ftate of the difeafe the tefticle cannot be felt without much dif- ficulty. On a minute examination, a hardnefs is always to be felt along that part of the fcrotum where the tefticle is fituated ; and at this point preflure excites fome uneafinefs. Fluduation of a fluid may in general be di- ftinguifhed through the whole courfe of the diieafe. In late ftages, however, the appearance of a fluid is not very evident. The tranfparency of the tumor has been generally iup- pofed to be the principal criterion of this fpecies of the diforder ; but this muft depend upon the nature of the contents, or thicknefs of the fac ; fo that, though the tranf¬ parency of the tumor is a certain fign of the exiltence 0 water, its opacity cannot upon any account be confidered as an indication of its abfence. Through the whole, courfe of the difeafe the tumor is not attended with pain, but fome uneafinefs is commonly felt in the back by the weight of the fwelling of the fpermatic cord. This is mere particularly the cafe when a fufpenfory bandage is not ufed.. _ . I n the radical cure of hydrocele, in whatever way it 15 attempted, fome degree of lever and inflammation will take place. Under the circumftances mentioned in the progno* fis, the operation, if properly performed, is generally attend¬ ed with the moft complete fucccfs. But if the patientTe very old, infirm, and difeafed, an operation may be attended with fuch a degree of inflammation, .and confequent inp* puratiwh 299 R Chap. XXIV. S U R | Hydrocele pupation, as to be in danger of’ dcftroying a conftitution al- | of the l u. rea^ greatly impaired, and thetefore ought not to be per- ft1 nica f j ° * nalU Tef. formed. v _ tis. Various methods have been propofed for the cure of hy- —v drocele, all of which may be reduced to two general heads : Such as have in view only a temporary relief, and which is therefore termed the palliative cure ; and fuch as are meant to effedl a radical cure. When the tumor has become fo large as to be inconvenient from its fize, an evacuation of the water by furgical means becomes necelTary. In this ^ cafe, if the patient either refufes to fubmit to the opera- tion for a radical cure, or if his ftate of health render that | operation improper, the palliative treatment, or a mere eva¬ cuation of the water by pundture, is the only means which can be employed. Method of A lancet pointed trocar was many years ago recommen- for the'jfal-et^ ^°r c^raw“1g water in this manner by the prefent liative cure '^_r Monro ; and lirce that time it has in an improved ftate (fig. 77.), been recommended by MrAndree; another (fig. 78.) has been propofed by Mr Bell. With any of thefe an opening may be made into the tunica vaginalis with fafety. t The operator with one hand fhould grafp the tumor be¬ hind, to prefs the contained fluid to the anterior and under part of it. If a round trocar is to be ufed, a pundhire with a lancet fhould be made where the trocar is to enter ; but where a. flat trocar is to be employed, the affiftance of the lancet is unneceflary. As foon as the inftrument has pierced the vaginal coat, the ftiktte fnould be withdrawn, and the canula left in the cift. The water will now run off; and if the tumor be not uncommonly large, it may be all drawn tff at once ; but as the hidden difcharge of it, by .taking off the fup- port, might be in danger of rupturing fome of the veffels, it mould be difcharged by flow degrees. When the whole is evacuated, a piece of adhefive plafter fhould be immedi¬ ately applied to the orifice ; and a comprefs of foft linen be¬ ing laid over the fcrotum, the whole fhould be firmly fun- ported with a fufpenlory bag (fig. 79.) or a T bandage. 1 he patient in this ftate being laid in bed, all kind of un- eaunels is in a few minutes commonly gone, and he is able to follow his ordinary bufinefs without interruption. The intention of every means now in ufe for the radical cure of this fpecies of the difeafe, is to induce fuch a degree of inflammation on the parts in which it is feated as may obliterate entirely the cavity of the tunica vaginalis, by making it adhere to the furface of the tefticle. The means at prefent generally employed for effeaing a cure are, e-xci- 1 lion or the tunica vaginalis ; the application of cauftic the . ot * fet.°lnli a fimple incifion of the fac ; and the iniec- „ ,CI, f-a TT .int° the tUnica va?lnalis, after drawing f.1 u hC Which 11 contaified- The method of cure, by vaginaVa^,nal coat’ is» firft to lay open the va- • ’ glIial J°Jt.’_and th4" to cut ^ away by different fnips of a P11. °Lf^ffarJ 1 h j .lac ,bemff removed, the parts are to be dreffed and treated in the fame manner as in the opera¬ tion wnere Ample mcifion is ufed. ^ The cure by cauftic is attempted in the following man¬ ner : 1 he fcrotum bung fhaved, a piece of common pafte cauftic, properly fecured with adhefive plafter, is applied, of about a finger s breadth, the whole length of the tumor • and if, on removing the cauftio, it has mot penetrated into the vaginal coat, an opening is made in it with a Icalpel, fo ^ to evacuate the contents lay bare the tefticle, and admit of p,ope, dreffings. But MrElfe, one-of the lateft writers is noVneceffitthr T ^ Cauftlc’ that ^ere many have^/ ^ cx[enFtve application of cauftic as- S T^°mmen edVthat 30 ^har of the fize of a ft «g i, fufficient j that this may be always fully obtained 300 for the ra¬ dical cure. it- 3°» _ Cduftil. G E R Y. i57 by the application of cauftic pafte of the fize of a fixpence, Hydrocele which is to be laid on the anterior and under part of the fcrotum, and to be properly fecured by plafter, in order to prevent it from fpreading. The cauftic commonly produces tis. all its effects in five or fix hours, and may then be removed. ■»—y-— + At this time digeftives, or an emollient poultice, muft be applied over the fcrotum, and the whole fufpended with a bandage. Inflammation, Mr Elfe obferves, is foon induced over the whole tunica vaginalis ; and the febrile fymptoms which fucceed, he advifes to be kept moderate by blood¬ letting, injedtions, emollient poultices, and a low regimen. In a few days the efeharofthe fcrotum feparates, and comes away ; and in a gradual manner, in the courfe of four, five, or fix weeks, the whole tunica vaginalis comes off, when the wound for the rpoft part foon heals, and a complete cure is obtained. Where Jt is intended to treat hydrocele by means of aBy a ktoBt feton, it may be done in the following manner : An opening is made with a fcalpel, or the fharp-pointed biftoury, in the fuperior part of the tumor, large enough to admit with eale a thick cord of common white fewing filk. A di- reftor, with an eye at one end, in which the cord is in- feited, is introduced at this opening ; and its farther ex¬ tremity being carried down to the moft depending part of the tumor, an opening is there made, of about half an inch in length, by cutting upon the diredlor with the biftoury j- the diredfor being now drawn till a fufficient quantity of filk is left hanging out below, the operation is in this man¬ ner finifhed. Another very fimple method of introducing a feton is by means of a filver canula and perforator. 304 . thc operation for a radical cute by incifion, the pa-By incifion*. tient being laid upon a table of convenient height, and pro¬ perly fecured by affiftants, with the fcrotum lying nearly on the edge of the table, the operator with one hand fhould grafp the tumor behind, fo as to keep it firm and make it> fomewhat tenfe anteriorly : With a common round edged fcc.lpel in the other hand, he fhould now divide the external' integuments by one continued incifion from the upper to- the under end or the tumor. An opening is next to be made in the vaginal coat with a large lancet, or a lharp pointed biftoury (fig. 80.), at the upper end of the firft incifion. This opening fhould be of inch a fize as freely to receive- the finger of the operator, which is to conduft a blunt pointed biftoury, fo as to divide the fac down to its bottom, which is confidered as being of advantage, by preventing, partial adhefions and the rifle of a return of the difeafe. I he incifion being completed, the tefticle is now brought- fuhy into view ; and if the tunica vaginalis be found, the- drolling may be finiftied immediately. But if the fac be; difeafed, it is to be removed, which may-be readily accom- plifhed by a fcalpel or biftoury. When the hydrocele, as fometimes happens, affeds both fides at the fame time, if, when the operation is done on one fide, an opening be made into the vaginal coat of the^ oppoiitc fide, at the upper part, through the feptum feroti, and the incifion carried down to the bottom of the tumor, the cift can be equally well laid open, the water as com¬ pletely evacuated, and a return of the difeafe as much pre¬ vented, as when the operation is done in the ufual manner, and at different times. In whichever way the incifion is made, if the tefticle be iound, the wound ought to be quickly dreffed; for it is- found, that on this much of the fuccefs of the operation depends. For if the vaginal coat be merely applied to the- jur’ °r United hy futurcs> as fome have advifed, partial adhefions are apt to take place, before a decree ot inflam-- mation is produced over the whole fufficient for making complete" ,5S S U U G Hv.1rorf.fe corrvpkts cwr«. In tins manner cavities are left, which i f tJie Tu- flu v,Jth pus during the cure, and require to be laid ilka Vaei- ^ Rr xhey, ^ftj^wards give life to colleftions of water, and thereby eccafion a return of the difeafe. The praftice 'of ftufFmg the cavity of the fore with dreflings is alfo a fre¬ quent eaufe of mifchief, by exciting too great a degree of inflammation in the part. But whea the dreffings are pro¬ perly managed, fymptoms of violence almoft never occur. The latcft authors advife, that in dreffing the parts alter the operation, two pieces of lint or foft old linen are to be dip¬ ped in oil, or in a liniment of wax and oil, and then, by the help of a probe, are to be inferred into the bottom of the fac on each fide of the teilicle, leaving a fnfiicient quantity of the pledgets hanging out of the wound, fo as to admit of being eafdy withdrawn at the tirft or fecond drefilng. The •edges of the wound are next to be dreffed with pledgets of cerate, and the ends of the oiled pledgets turned over on each fide. Several pieces of foft lint are then to be laid over the wound, and thefe fhould be more or lefs numerous^ in proportion to the heat of the feafon. A. comprefs of linen is now to be laid over the whole, and the dreflings fupported by a T bandage or fufpenfory bag properly fit¬ ted. The patient is then to be carried to bed ; an anodyne fhould be given, efpecially if there be much pain ; and he ought to be advifed to lie as much as poffible upon his back for a few days after tlte operation. In the third or fourth day after the operation, all the dreflings, except thofe between the tefticle and tunica vagi¬ nalis, are to be removed ; and if this cannot be done readi¬ ly, as the parts are otherwife apt to become uneafy, a fponge dipped in waim water fhould be applied. On fome occa- iions, at the firft drefiing, and always at the fecond or third, the pledgets inferted between the tunica vaginalis come away ; and whenever this happens, they fhould be renewed. It is alfo proper to renew them daily for the firft fourteen or fifteen days after the operation ; not however of the fame depth as the firfl, for during the latter part of the cure they need only to be inferted as far as to prevent the divided edges of the tunica vaginalis from adhering to the tefticle, before the adhefive procefs has taken place in the parts more deeply feated. Particular attention however is neceflary to this part of the treatment; for when the difeafe returns, it has been found to be chiefly owing to the edges of the vaginal coat being allowed to adhere to the tellicle, before adhefion had taken place between the deeper parts. A complete adhefion of the two coats of the tefticle, the tunica vaginalis, and tunica albuginea, takes place moft fre¬ quently about the third week after the operation. Previous to this time, inflammation continuing gradually to increafe, the tumor becomes larger till it acquire fomewhat of the fize of a fwelled tefticle from gonorrhoea ; but after this period it gradually fubfides, and the fore produced by the incifion, and now reduced to a line, heals in fome time between the fourth and eight week, according to the ha- bit of body, age of the patient, and other circumftances. Ccnipara- Having thus given an account of the methods ufually em- live advan-ployed in the cure of hydrocele, we fhall now make a few ob- lacfTof fervations on the comparative advantages of the three laft. From the teftimony of many authors of credit, it is evident, that any of thefe methods, in moft inftancds, prove effeftual; but every praftitioner being apt to be prejudiced in favour of a particular method, he generally continues to follow that mode and no other ; and finding it commonly fucceed, be by degrees perfuades himfelf, that other methods of cure, with which he has not had fuch opportunities of becoming acquainted, are liable to objections, which "thofe who have pra&ifed them do not find to be the cafe. The icfult of thefe me- ahods. E R Y. Chap. XXIV, Mr B. Bell’s obfervations upon this fubjeft is, that although Hydrocele all the three modes of operating, by cauftic, the feton, and 'n^ahe Tu* fimole incifion, are perhaps equally capable of producing a radical cure ; yet, that of the three, the latter, viz. the tis, mode by the fimple incifion, is liable to feweft objeaions, and —^ effeas a cure, both with leaft trouble to the operator and leaft rifle to the patient: and of the other two, the treat¬ ment by cauftic appears to be the beft. He has feen all the three produce troublefome fymptoms, fuch as, pain and tenfion of the abdomen, inflammation, and fever ; but hefi- tates not to lay, that the feton is more frequently produdive of thefe effeas than any of the other methods. ^ Befides the methods already mentioned, another has been Radical lately revived, viz. the injeding of irritating liquors into the cure by vaginal coat of the tefticle. This method is particularly de.in)e«. feribed by a Monfieur Lambert of the laft century, and may be of much older date for any thing which is known to the contrary. From fome caufe or otfier it feems to have been entirely laid afide till about the middle of the prefent centu¬ ry, when it was pradifed by Mr Monro (afterwards a phy. fician-general in the Weft Indies), under the landion of the late Dr Monro, and favourably received and followed by fome of the firft furgeons of this place. But in ge¬ neral, though the cure appeared complete, the difeafe re¬ turned. The preference is ufually given to wine, and commonly that is fomewhat diluted ; but where no pain is excited by the injedion, the liquor fhould be difeharged, and a ftronger one uied. For where no pain takes place, a cure is not to be expeded. The following is the moft approved method of perform- ing the operation : The operator fhould be provided with a fiat trocar and canula, and with a bag of refina elaftica, fit¬ ted with a flop-cock and pipe, which ought exadly to fuit the canula. See fig. 81. The patient being laid in an horizontal pofture, either upon a bed or a table, the water fhould be drawn entirely off from the tumor by a flat trocar paffed into the under and fore part of it. The operator fecuring the canula with the one hand, is with the other to pals the tube of the in- jedion-bag fairly through it, and with gentle preffure to force in as much of the liquid as may reach the whole fur- face of the vaginal coat, as well as the whole furface of the tefticle. The bag fhould now be removed, leaving the tube within the canula of the trocar, fo that by turning the ftop- cock the injedion may be retained in the cavity of the tu¬ mor. The canula of the trocar ought ftill to be kept fixed, otherwife it might recede, by which the liquid would inli- nuate into the cellular fubftaiice of the ferotum. The li¬ quor fhould likewife be brought into contad with every part of the cavity; and after remaining about tour, or at the moft five, minutes in the fac, it fhould be entirely difeharged through the canula of the trocar, after withdrawing the tube of the elaftic bag. Sometimes intenfe pain is felt immediately after the li¬ quor is thrown in. When this is the cafe, it fhould be dif¬ eharged as foon as it has pafied over the difterent parts of the tunica vaginalis. Some recommend a repetition of the fame kind of injedion immediately after the firft has been difeharged, and to be retained for the fame period, though this is not commonly pradifed. The whole of the injedion fhould be completely difehar¬ ged, after which the ferotum fhould be covered with a pledget of cerate, a comprefs being applied over it, and re¬ tained with a fufpenfory bag. The patient ought to be in bed for feveral days, and fupport the ferotum in the bandage by means of a fmall pillow. Though it is difficult to afeertain the proportion of thofe . who Chap. XXIV. S U R C Hydrocele who are cured by the method of inje&ione, and though it ofthe. is to be regretted that hitherto the difeafe is found to return PCord.tlC *n a ^reat ProPortiOIi thofe .upon whom this operation has been performed; yet, on account of the facility with which it can be done, the comparatively fmall pain with which it is attended, the quicknefs of the cure, and chiefly becaufe it does not, in cafe of a return of the difeafe, pre¬ clude the future operation of incifion, it appears a method which, in all probability, will be more and more adopted in¬ to pra&ice. .tor Anafarcous ■ hydrocele of the fper- znatic cord. Sect. III. Of Hydrocele of the Spermatic Cord. 308 Symptoms r 3f encyfled ll-lydrocele dpf the fper- »acic cord. 310 Symptoms. Anasarcous hydrocele of the fpermatic cord fometimes accompanies afeites, and at other times it is found to be con¬ fined to the cellular fubilance in or about the fpermatic cord. The caufes of this difeafe may be, obftru&ions in the lym¬ phatics leading from the part in confequence of feirrhous af- feftions of the abdominal vifeera, or the preffure of a trufs applied for the cure of hernia. When the affe&ion is conne&ed with anafarca in other parts, it is then fo evident as to require no defeription. When it is local, it is attended with a colourlefs tumor in the com fe of the fpermatic cord, foft and inelaftic to the touch, and unaccompanied with flu&uation. In an erett po- fition of the body it. is of an oblong figure ; but when the body is.recumbent, it is flatter and fomewhat round. Ge¬ nerally it is no longer than that part of the cord which lies in the groin, though fometimes it extends as far as the te- fticle, and even ftretches the ferotum to an uncommon fize ; an inftance of which is. related by Mr Pott, who from a hvelling ot this kind difeharged 11 Englifli pints at once. y premire, a great part of the fwelling can always be made to recede, into the abdomen. It inftantlv, however, re¬ turns to its former fituation on the preffure being with¬ drawn. When the tumor is conne&ed with general anafarca of the lyitem, it can only be cured along with the reft of the dileafe ; but when the fwelling is local,, the remedy is alfo to be locally applied. An incifion is to be made of fucb a fize as may be fuffioent for difeharging the whole of the water ; in the performance of which, attention is neceffary to guard again ft hurting, the fpermatic veffels. The contents of the tumor being difeharged, the fore is to be treated like any other limple wound. J Encyfted hydrocele of the fpermatic cord fometimes be¬ gins in the upper, but generally at the lower part of the fper¬ matic cord. On its fir ft appearance it is fo frruT as to