/3 > i ia t V-' ^0 (? »c» •i ea ) - the ^atory, y Jord car- the clergy -y -lounced—Aiks tvhen Edward VI, x'roteftant j and for¬ th at t BAR I Balk-kind- ;ng} as well as for the fetching fea-water to make fait lnJ> of. Thev h nVP q I, . Barley. of. I hey have a deck, and are (filled with water un to the deck. BARK-Baiding, a diftemper incident to trees; cured by flitting the bark, dr cutting along the grain. Ba r k - Galling,. is when the trees are galled with thorns, &c. It is cured by binding clay on the Q-alled places. ^ Bari.-Longue, or Barcn Longa, a fmall low fharp- built, but very long, veffel without a deck. It goes Vvith fails and oars, and is very common in Spain. BARK HAMS I E AD, or Berkhamstead, a town of Hertfordihire in England, feems to have been the nte of a Roman town. It had formerly a ftrong caftle built by the Normans, but it has been longfince demo- lifhed. W. Long. o. 35. N. Lat. 45. 49. BARKING, a town of Eflex in England, feated -on the river Roding, not far from the Thames, in a very unwholefome air. It has been chiefly noted for a large monaflery, now in ruins 5 there being nothing eft Handing but a fmall part of the walls and a gate^ houfe. E. Long. c. 13. N. Lat. $1. 30. Barking of Trees, the peeling off the rind or bark, l his muff be done, in our climate, in the month of May, becaufe at that time the fap of the tree feparates the bark from the wood. It would be very difficult to perform it at any other time of the year, unlefs the feafon was extremely wet and rainy j for heat and dry- ne.s are. a very great hindrance to it. ^ By the French laws, all dealers are forbid to bark tueir wood while growing, on the penalty of 500 livres. 1 his law was the refult of ignorance ; it being now found that barking of trees, and letting them die, in- creafes the ftreng A of timber. ^ Ai\I\LL v , a town of Gloucefferfhire in England, feated on a branch of the river Severn. It was for¬ merly of fome note for a nunnery, and has ftill the title of a barony. W. Long. 2. 30.' N. Lat. 51. 40. BARKWAY, a town of Hertfordfliire in Eng¬ land, on the great road from London to York. W, Long. o. 5. N. Lat. 52. BARLuEUS, Caspar, profeffor of philofophy.at Amrterdam, and one of the beft Latin poets of the t 7th century. There was fcarce any thing great that happened in the world, while he lived, but he made a pompous elegy upon it, when reafons of ftate were no obftacle to it. He was a great defender of Arminius • and fhowed his abilities in hiftory by his relation of what paffed in Brafil during the government of Count Maurice of Naffau, publiflied 1647. He died the year alter. ■ ^ BARLERIA, Snap-Dragon. See Botany Ln- aex. BARLETTA, a handfome and ftrong town of Italy, in the kingdom of Naples, and in the Terra dl r TT 3 ^^10P’S fee* It is fituated on the gulf of Venice, m E._ Long. 16. 32. N. Lat. 41. 30. BARLEY, in Botany. See Hordeum, Botany and Agriculture Index. I he principal ufe of barley among us is for making beer 5 in order to which it is firft malted. See the ar¬ ticle Beer. I he Spaniards, among whom malt liquors are little known, feed their horfes with barley as we do with cats. In Scotland barley is a common ingredient in V OL. in. Part II. r 401 1 bar broths ; and the confumpt of it for that purpofe is very confiderable, barley-broth being a dilh as frequent there as that of foup in h ranee. Pearl Barley, and French Barley ; barley freed of the hulk by a mill; thq difthiftion between the two being, that the pearl barley is reduced to the fize of fmall fhot, all but the very heart of the grain beincr ground away. . *■’ BARLEY-lVater, is a decoftion of either of thefe, re¬ puted foft and lubricating, of frequent ufe in phyfic. I his well known decodlion is a very ufeful drink in many diforders ; and'is recommended^ with nitre by fome authors of reputation, in flow fevers. ’ BARLEY-Corn is ufed to denote a long meafure, con¬ taining in length tha third part of an inch, and in breadth the eighth. The French carpenters alfo ufe barley-corn, gram d'orge, as equivalent to a line, or the twelfth part of an inch. BARLEY-Corn (gram d'orge), is alfo ufed in building tor a little cavity between the mouldings of ioinerl work, forving to feparate or keep them afunder : thus called becaifle made of a kind of plane of the fame name. Pearl-Ear- ley II -Barlow. r William, biflrop of Chicheffer, de- icended of an ancient family in Wales, was born in the county of Eflex. In his youth he favoured the Refor¬ mation 5 and travelled to Germany to be inftrucled by Luther, and other preachers of the new dodrine. How long he continued a Proteftant is uncertain : but from his letter to King Henry VIII. quoted below, it appears that he wrote feveral books againft the church of Rome. However, he was a regular canon in the Auguftme monaftery of St Ofith in the county of Ef¬ lex and ftudied fome time at Oxford with the brothers of that order, where he took the degree of dodor in. divimty. He was then made prior of the convent at Bifliam in Berkfhire ; and afterwards fucceeded to the ieveral priories of Blackmore, Typtree, Lega, Brom- hole, and Haverford-weft. On the diffolution of ab- beys, he refigned not only with a good grace, but per- luaded feveral other abbots to follow his example King Henry was fo pleafed with his ready obedience on this occafion, that he fent him, in on an embafly to Scotland; in the fame year, made him bi- ihop of St Afaph ; m two months after, tranflated him 1 turn0 S* Da.Vld’3 and in r547 to that of Bath and Wells. During this time, our good bilhop, as appears from the following epiflle to the king, was or pretended to be a {launch Papift : it was written in 1 , Prayfe be to God, who of his infynyte good¬ ness and mercy ineftymable hath brought me out of arknefs into light, and from deadly ignorance into the r,k k"ow;ledSc the truth. From which, through the Fend s mftigation and falfe perfuafion, I have great¬ ly fworved.-In fo much that I have made certayn bokes, and have foffred them to be emprinted, as the tretife of the Bury a 11 of the Mafs, &c. In thefe tre- tffes I perceive and acknowledge myfelf grievoufly to have erred namely againft the bleffed facrament of the altare ; difallowing the maffe and denying purgatory with flanderous infamy of the pope and my lo?d car- dinal, and outrageous rayling againft the clergy; Whl.ch 1loriaken and utterly renounced—Aiks pardon,V ilham Barlow.” However, when Edward VI came to the crown, he was again a Proteftant j and for 3 L that BAR Barlow, that reafon, on Queen Mary’s acceffion, ■"—/——' 0f jjjs blfhopric, and fent prifoner to the Fleet, where he continued 1’orae time. At length he found means to el'cape, and immediately joined the other Englilh Proteflants in Germany. When Queen Elizabeth af- cended the throne, our prelate was raifed to the fee of Chichefter, and loon after made firft prebendary of the collegiate church of Weftminfter. He died in 1568, and was buried in the cathedral at Chichefter. He had five daughters, each of which married a bithop. He wrote, 1. The Buryal of the mafle. 2. The climb¬ ing up of Fryers and religious Perfons, portred with Fi¬ gures. 3. Chriftian Homilies. 4. A book upon Colmo- grapby. 5. The godly and pious Inftitution of a Chri¬ ftian Man, commonly called the Bifhop's Book; and feveral other works. He is faid to be the tranflator of the i^pocrypha as far as the book of Wildom. His letters to M. Parker are in manufeript in Corpus Chriiti college, Cambridge, Mifc. i. 445. Barlow, William, a mathematician and divine, the fon of the biftiop of Chichefter, was born in Pem- brokelhire whilft his father w^as bilhop of St David’s. In 1560, he was entered commoner of Baliol college in Oxford 5 and in 1564, took a degree in arts, which having completed by determination, he left the uni- verfity and went to fea \ but in what capacity is un¬ certain : however, he acquired confiderable knowdedge in the art of navigation. About the year 1573, he entered into orders \ and became prebendary of Win- chefter and re&or of Eafton near that city. In 1588, he was made prebendary of Litchfield, which he ex¬ changed for the place of treafurer of that church. Some years after, he was made chaplain to Prince Henry, the fon of King James I. \ and in 1614, archdeacon of Salilhury. He was the firft writer on the nature and properties of the magnet. Barlow^ died in the year 1623, and was buried in the church at Eafton. His wmrks are, 1. “ The Navigator’s Supply, containing many things of principal importance belonging to na¬ vigation, and ufe of diverfe inftruments framed chief¬ ly for that purpofe.” London, 1597? 4to, Dedicated to Robert earl of Effex. 2. “ Magnetical Advertife- ments, or diverfe pertinent Obfervations and approved Experiments concerning the Nature and Properties of the Loadftone.” London, 1616, 4to. 3. “ A brief Difcovery of the idle Animadverfions of Mark Ridley, M. D. upon a Treatife entitled Magnetical Advertife- ments.” London, 1618, 4to. Barlow, Thomas, born in 1607, wfas appointed fellow of Queen’s college in Oxford in 1633 ; and two years after was chofen reader of metaphyfics to the uni- verfity. He was keeper of the Bodleian library, and in 1657 was chofen provoft of Queen’s college. After the reftoration of King Charles II. he was nominated one of the commiffioners for reftoring the members un- juftly expelled in 1648. He wrote at that time The Cafe ‘ f Toleration in Matters of Religion, to Mr R. Boyle. In 1675, he was made biftiop of Lincoln. After the popiih plot, he publifhed feveral trafts againft; the Roman catholic religion j -in which he {hows an uncommon extent of learning, and {kill in polemical divinity. Neverthelefs, when the duke of York was proclaimed king, he took all opportunities of exprefling his affection toward him m, but after the revolution he as readily voted that the king had abdi- [ 402 ] BAR as deprived cated his kingdom and was very vigorous in exclud¬ ing thofe of the clergy who refufed the oaths, from their benefices. Mr Granger obferves, that “ this learned prelate, whom nature defigned for a fcholar, and who a£ted in conformity with the bent of nature, wras perhaps as great a roafter of the learned languages, and of the works of the celebrated authors who have written in thofe languages, as any man in his age. The greateft part of his writings, of which Mr Wood has given us a catalogue, are againft Popery •, and his conduct for fome time, like that of other Calvinifts, appeared to be in direct oppofition to the church of Rome. But after James afeended the throne, he feemed to approach much nearer to Popery than Re ever did before. He fent the king an addrefs of thanks for his declaration for liberty of confcience, and is laid to have written reafons for reading that declaration. His compliance* w7ere much the lame after the revolution. His mo¬ deration, to call it by the fofteft name, was very great; indeed fo great as to bring the firmnefs of his charac¬ ter in queltion. But cafuiftry, which was his moll diftinguilhed talent, not only reconciles feeming con- tradiftions, but has alfo been known to admit contra- diftions themfelves. He was, abftra&ed from this lax¬ ity of principles, a very great and worthy man.” He died at Buckden, in Huntingdonlhire, on the 8th of October 1691, in the 85th year of bis age. Barlow, Francis, an Englilh painter, was born in Lincolnlhire. On his coming to London, he was placed with one Shephard, a limner; but his ge¬ nius led him chiefly to drawing of birds, filh, and other animals. There are fix books of animals from his drawings, and he painted fome ceilings with birds for noblemen and gentlemen in .the country. His etchings are numerous; his iiluftration of Eibp is his greateft wmrk. He died in 1702. There is fome- thing pleafing in the compofition and manner of this mafter, though neither is excellent. His drawing too is very indifferent; nor does he characterize any animal juftly. His birds in general are better than his beafts. BARM, the fame with yeft. See Yest.—Barra is faid to have been firft ufed by the Celtae in the ' compofition of bread. About the time of Agricola’s entrance into Lancaftiire, a new fort of loaf had been introduced at Rome ; which was formed only of wa¬ ter and flour, and much efteemed for its lightnefs; and it was called the water cake from its Ample com¬ pofition, and the Parthian roll trom its original inven¬ tors. But even this w as not comparable to the French or Spanilh bread for its lightnefs. The ufe of curmi*, * See A!‘-> and the knowledge of brewing, had acquainted the Celtes with an ingredient for their bread, which was much better calculated to render it light and pleafant, than the leaven, the eggs, the milk, or the wine and honey, of other nations. This was the fpume which arofe on the furface of their curmi in fermentation, and w hich the Welch denominate burm and we barm. The Celtes of Gaul, of Spain, and moft probably therefore of South-Britain, had long ufed it; and their bread was, in confequence of this,, fuperior in lightnefs to that of any other nation in the world f. See the ar¬ ticles Baking and Bread. BARMAS, an Eaft Indian people, who in 1515 poffeffed ■ f Pliny, HE xviii, c. 7* 11. BAR [4 Bam poflefled all the coaft extending from Bengal to Pegu. Barnabas’ ^ aPPears a^°’ were fornierly mafters of W_^w' Ava, the dominions of which extended as far as China; and of confequence the Barmas were mafters of moft of the northern part of the peninfula beyond the Gan¬ ges. Their dominions, however, were afterwards re¬ duced to very narrow bounds, and their king became tributary to the king of Pegu ; but by degrees they not only recovered their former empire, but conquered the kingdoms of Pegu, Siam, and feveral others. By the lateft accounts, their kingdom extends from the pro¬ vince of Yun-nan in China, about 800 miles in length from north to fouth, and 250 in breadth from eaft to weft. See Asia and Pegu. BARN, in Hufbandry, a covered place or houfe, with air-holes in the fides, for laying up any fort of grain, hay, or ftraw. St BARNABAS’S Day, a Chriftian feftival, cele¬ brated on the 1 ith of June.—St Barnabas was born at Cyprus, and defcended of the tribe of Levi, whofe Jewifti anceftors are thought to have retired thither to fecure themfelves from violence during the troublefome times in Judea. His proper name -wasjofes; to which, after his converfion to Chriftianity, the apoftles added that of Barnabas, fignifying either the fon of prophecy, or the fon of conflation; the firft refpe&ing his eminent prophetic gifts, the other his great charity in felling Ids eftate for the comfort and relief of the poor Chri- ftians. He w^as educated at Jerufalem, under the great Jewifti dosftor Gamaliel; which might probably lay the foundation of that intimate friendftiip which was afterwards contra&ed between this apoftle and St Paul. The time of his converfion is uncertain ; but he is ge¬ nerally efteemed one of the feventy difciples chofen by our Saviour himfelf. At Antioch, St Paul and St Barnabas had a con- teft, wTich ended in their feparation : but what fol¬ lowed it with refpefi: to St Barnabas is not related in the ABs of the Apofles. Some fay, he went into Ita¬ ly, and founded a church at Milan. At Salamis, we are told, he fuffered martyrdom •, whither fome jews, being come out of Syria, let upon him, as he was dif- puting in the fynagogue, and ftoned him to death. He was buried by his kinfman Mark, whom he had taken with him, in a cave near that city. The re¬ mains of his body are faid to have been difcovered in the reign of the emperor Zeno, together with a copy of St Matthew’s gofpel, written with his own hand, and lying on his breaft. St Barnabas's Epi/l/e, an apocryphal work afcribed to St Barnabas, and frequently cited by St Clement of Alexandria and Origen. It was firft publifhed in Greek, from a copy of Father Hugh Menard a Bene- di3 ] BAR altered and interpolated by the Mahometans, the better Barnabites to ferve their purpofe. || BARNABITES, a religious order, founded in the Barn<"veMt,‘ 16th century by three Italian gentlemen, who had been advifed by a famous preacher of thofe days to read carefully the epiftles of St Paul. Hence they were called clerks of St Paul; and Barnabites, becaufe they performed their firft exercife in a church of St Barna¬ bas at Milan. Their habit is black ; and their office is to inftrua, cathechife, and ferve in miffion. BARNACLE, a fpecies of goofe. See Anas, Or¬ nithology Index. BARNACLES, in Farriery, an inftrument com- pofed of two branches joined at one end with a hinge, to put upon hories nofes when they will not Hand quiet¬ ly to be ffiod, blooded, or dreffed. BARNADESIA. See BoPany Index. BARNARD, or Bernard, John, the fon of John Barnard gent, was born at Caftor in Lincolnfture, and educated at Cambridge. After feveral preferments, he was made a prebendary of the church of Lincoln. lie wrote Cenfura Clerior, againft fcandalous minifters not fit to be reftored to church livings ; the Life of Dr Heylyn; and a few other works. He died at Newark Auguft 17. 1683. ? Barnard Cafle, feated on the river Tees in the ■county of Durham, is a town and barony belonging to Vane earl of Darlington. It is indifferently large, and has a manufa&ure of ftockings. W. Long. 1. 4c. N. Lat. 54.35. P ARNES, Jo s h u A, profeffor of the Greek language at Cambridge, in the beginning of the 18th century. He was chofen queen’s profeffor of Greek in 1699, a language he wrote and fpoke with the utmoft facility. His firft publication was a whimfical traft, entitled, Gerama, or a new Difcovery of the little fort of people called Pygmies. After that appeared his Life of Ed¬ ward III. in which he introduces his hero making long and elaborate fpeeches.—In the year T700, when he publiftied many of his works, Mrs Mafon," of Hem- mingford, in Huntingdonffiire, a widow lady of be¬ tween 40 and 50, with a jointure of 200I. per annum, who had been for fome time a great admirer of him’ came to Cambridge, and defired leave to fettle 100I. a year upon him after her death ; which he politely refufed, unlefs {he would likewife condefcend to make him happy with her perfon, which was not very enga¬ ging. The lady was too obliging to refufe any thing to Joftiua, for whom {he faid, “ the fun flood ftill and they were accordingly married. Mr Barnes wrote feveral other books befides thofe abovementioned, par¬ ticularly, Sacred Poems ; The life of Oliver Cromwell, the Tyrant ; feveral dramatic pieces ; a poetical Para¬ ph/ afe on the Ilifory of Ffher, m Greek verfe, with a Latin tranflation, &c.: and he publiftied editions of Euripides, Anacreon, and Homer's Iliad and Odyjfey, v\ith notes and a Latin ■ tranflation. He wrote wdth greater eaie in Greek than even in Engliffi, and yet is generally allowed not to have underftood the delicacies of that language. He was of fuch a humane difpofi- tion, and fo unacquainted wfith the world, that he gave his only coat to a vagrant begging at his door. This excellent man died on the 3d of Auguft 1712, in the 58th year of bis age. BARNEVELDi , John d’Olden, the celebrated 3 P 2 Dutch BAR [ 404 ] BAR Barnet Dutch ft ate (roan, and one of the founders of the civil liberty of Holland. His patriotic zeal inducing him " " ~ , to limit the authority of Maurice prince of Orange . the fecond ftadtholder of Holland, the partizans of that> prince fallely accufed him of a defign to deliver his country into the hands of the Spaniih monarch. On this abfurd charge he was tried by 26 commiiTaries deputed fVom the feven provinces, condemned, and be¬ headed in 1619. His fans William and Rene, with a view of revenging their father’s death, formed a con- fpiracy againft the ftadtholder, which was difcovered. William fled : but Rene was taken and condemned to die ; which fatal circumftance has immortalized the memory of his mother, of whom the following anecdote is recorded. She folicited a pardon for Rene •, upon which Maurice expreffed his furprife that fhe fliould do that for her fon which the had refufed for her hulband. To this remark, ftie replied with indignation, “ 1 would not alk a pardon for my hufband, becaufe he was innocent. I folicit it for my fon, becaufe he is guilty.” BARNET, a town partly in Middlefex and partly in Hertfordihire. It is a great thoroughfare, and the , market is very remarkable for hogs. W. Long. o. 5. N. Lat. 51. 42. BARNSLEY, or Black Barnsley, a town of the weft riding of Yorkihire, feated on the fide of a hill, and Eve furlongs in length. W. Long. 1. 20. N. Lat. 53- 35- BARNSTABLE, a fea-port town of Devcnftiire, feated on the river Tau, over which there is a good bridge. It is a corporation town, and fends two mem¬ bers to parliament. W. Long. 4. 5. N. Lat. 51. 15. BARO, or Baron, Peter, profeflbr of divinity in the univerfity of Cambridge, in the 16th century, was born at Eftampes in France, and educated in the uni¬ verfity of Bourges, where he was admitted a licentiate in the law but being of the Proteftant religion, he was obliged to leave his native country to avoid perfe- cutionj and withdrawing into England, was kindly en¬ tertained by Lord Burleigh. Fie afterwards fettled at Cambridge ; and by the recommendation of his noble patron, was, in 1574, chofen Lady Margaret’s profeflbr there. For fome years he quietly enjoyed his profef- forftiip •, but there was at laft railed a reftlefs faeftion againft him, by his oppofing the doctrine of abfolute predeftination ; which rendered his place fo uneafy to him, that he chofe to leave the univerfity, and to fettle in London. Fie wrote, 1. In Jonatn Prophetam Prce¬ lt Eliones xxxix. 2. De PrcrJIantia et Dignitate Divine? Legis ; and other pieces. He died in London, about the year 1600. BAROCCI, Frederic, a celebrated painter, was born at Urbino, where the genius of Raphael infpired him. In his early youth he travelled to Rome; where he painted feveral things in frefco. He then returned to Urbino ; and giving himfelf up to intenie ftudy, acquired a great name in painting. His genius parti¬ cularly led him to religious fubjeils. At his leilure hours, he etched a few prints from his own defigns ; » which are highly finiihed, and executed with great foftnefs and delicacy. The Salutation is his capital performance in that way : of which we feldom meet with any impreflions, but thofe taken from the retouched plate, which are very harfli. He died at Urbino in 1612, aged 84. BAROCHE, a town of Cambaya, in the domi- Baroche nions of the Great Mogul; it is walled round, and w as gar(Jjctcr formerly a place of'great trade. It is now inhabited f ..C by weavers and fuch mechanics as manufaclure cotton cloth. Plere they have the beft cotton in the world, and of confequence the beft baftas are manufa&ured in this place. The Englilh and Dutch had formerly fac¬ tories here, which are now abandoned. ,E. Long. 72. 5. N. Lat. 22. 15. BAROCO, in Logic, a term given to the fourth mode of the fecond figure of fyllogifms. A fyllogifm in baroco has the firft propofition univerfal and affirma¬ tive, but the fecond and third particular and negative, and the middle term is the predicate in the two firft: propofitions. For example, Nullus homo non ejl hipes : Non omne animal ejl hipes : Non omne animal ejl homo. BAROMETER, (from weight, and meafure), an inftrument for rneafuring the weight of the atmofphere, and of ufe in foretelling the changes of the weather, and alfo for meafuring the height of mountains, &c. j The common barometer confifts of a glafs tube her-Principles meticaliy fealed at one end, and filled with quickfilver of the ba- well defecated and purged of its air. The finger beingrometer' then placed on the open end, in immediate contadl wdth the mercury, fo as not to admit the leaft particle of air, the tube is inverted, and the lower end plunged into a bafon of the fame prepared mercury ; then upon re¬ moving the finger, the mercury in the tube w ill join that in the bafon, and the mercurial column in the tube will fubfide to the height of 29 or 30 inches, according to the ftate of the atmofphere at that time. This is the principle on which all barometers are couftrucled. Of their invention, the different kinds of them, and the theories by which their phenomena are folved, we ffiall proceed to give an hiftorical account. In the beginning of the laft century, when the doc- Difco2vered trine of a plenum was in vogue, philofophers were of Galila-o, opinion, that the afeent of water in pumps was owing and im- to the abhorrence of a vacuum ; and that by means of proved by fudlion, fluids might be raifed to any height whatever.Ioulce x' But Galilseo, who flouriffied about that time, difcover¬ ed that water could not afeend in a pump unlefs the fucker reached within 33 feet of its furface in the well. From hence he concluded, that not the power of fuftion, but the preflure of the atmofphere, w as the caufc of the afeent of water in pumps; that a column of water 33 feet high was a counterpoife to cne of air of an equal bafe, whofe height extended to the top of the atmo¬ fphere ; and that for this reafon the water would not follow the fucker any farther. From this Torricelli, Galilseo’s difciple, took the hint ; and confidered, that if a column of water of about 33 feet in height w as equal in weight to one of air having the fame bafe, a column of mercury no longer than about 294 inches would be fo too, becaufe mercury being about 14 times heavier than water, a column of mercury muft be 14 times ffiorter than one of water equally heavy. Ac¬ cordingly, having filled a glafs tube with mercury, and inverted it into a bafon of the fame, he found the mer¬ cury in the tube to defeend till it flood about 29' in¬ ches above the furface. of that in the bafon.. Notwithftanding BAR [4 Barometer. Not with (landing this clear proof of the preflure of '—1 the atmofphere, however, the affertors of a plenum left 3 , ^ no means untried to folve the phenomena of the Tor- Sri'.ii/'..,- 1 r ii , pothefis of ncelhan experiment by iome other hypothehs. Linus. The 4 Experi¬ ments in confirma¬ tion of it. 5 Refuted. naoft ridiculous folution, and which at the fame time gave the adverfe party the greateft difficulty to over¬ throw it, was that of Linus. He contended, that in the upper part of the tube, there is a film, or rope of mer¬ cury, extended through the feeming vacuity j and that, by this rope, the reft of the mercury was fulpended, and kept from falling into the bafon. Even this fo ab- furd hypothefis he pretended to confirm by the follow¬ ing experiments. Take, fays he, a fmall tube, open at both ends, fuppofe about 20 inches long ; fill this tube with mercury, flopping the lower orifice with your thumb : Then clofing the upper end with your finger, and immerging the lower in ftagnant mercury, you lhall perceive, upon the removal of your thumb, a manifeft fudlion of your finger into the tube j and the tube and mercury will both flick fo clofe to it, that you may carry them about the room. Therefore, fays he, the internal cylinder of mercury in the tube is not held up by the preponderate air without ; for if fo, whence comes fo flrong a fuftion, and fo firm an adhefion of the tube to the finger r—The fame efifedl follows, though the tube be not quite filled with mercury j for if a little fpace of air is left at the top, after the tube is immerged in the ftagnant mercury, there will be a conflderable fuction as before. Thefe experiments, which are themfelves clear proofs of the preflure of the air, fupported for fome time the funicular hypothefis, as it was called, of Linus. But when it was difcovered, that if the tube was carried to the top of a high mountain the mercury flood lower than on the plain, and that if removed into the vacuum of an air-pump it fell out altogether, the hypothefis of Linus was rejected by every body.—There are, how- able experi-ever, two experiments which create a confiderable dif- ments by ficulty. One is mentioned by Mr Huygens, viz. that if a glafs tube 7 $ inches long, or perhaps longer, is filled with mercury well purged of its air, and then in¬ verted, the whole will remain fufpended •, whereas, ac¬ cording to the Torricellian experiment, it ought to fub- fide immediately to the height of 29 or 30 inches. It is true indeed, that, upon fhaking the tube, the mer¬ cury prefently fubfides to that height ; but why it fhould remain fufpended at all, more than twice the height to which it can be raifed by the preffure of the moil denfe atmofphere, feems not eafily accounted for; I nf itisfac anc^ accordingly, in the Philofophical Tranfaflions, we torily ac- And attempts to account for it by the preflure of a me- counted for dium more fubtile than the common air, and capable In the Phi- Gf pervading both the mercury and glafi. We find there alfo another very furprifing faff of the fame kind mentioned •, viz. that a pretty large tube under 29 in¬ ches in length, filled with mercury, and inverted into a bafon of the fame, will remain full, though there be a fmall hole in the top. This too, is there accounted for by the preflure of a medium more fubtile than com¬ mon air 5 but by no means in a fatisfadlory manner. Mr 6 Retnark- IVlr Huy¬ gens, lofophical Tranfac tions 8 Mr Row- ning’s folu- Rowming, who mentions the phenomenon of the 75 twn. inch tube, accounts for it in the following manner. “ The caufe of this phenomenon feems to be, that by the great weight of fo long a column of mercury, it was prelfed into fo clofe contaft with the glafs in pour- >5 1 bar ing in, that, by the mutual attraction of cohefion be- barometer, tween the mercury and the glafs, the whole column was fuftained after the tube was inverted.’—Here,infugj„ however, we mull obferve, that this folution feems cient. equally unfatisfacfory with that of the fubtile medium already mentioned ; becauie it is only one end of the column which fuftains fo great a prefiure from the weight of the mercury 5 and therefore, though five or fix inches of the upper part of the tube, where the pref¬ lure had been ftnongeft, might thus remain full of mer¬ cury, yet the reft ought to fall down. Befides, it is only the outfide of the mercurial column that is in con- tadl with the glafs, and confequently thele parts only ought to be attrafted. Therefore, even granting the prel- fure to be equally violent, on the inverfion of the tube, all the -way from 29 to 75 inches, yet the glafs ought to be only as it were filvered over by a very thin film of mercury, while the middle parts of the column ought to fall out by reafon of their fluidity. 10 The other experiment hinted at, is with regard to Another fiphons ; which though it belongs more properly to the^xf^njPlCh' article Hydrostatics, yet feems neceflary to be men-p|10ns> tioned here. It is this: That a liphon, once fet a run¬ ning, wdll continue to do fo though fet under the re¬ ceiver of an air-pump and the air exhaufted in the moil perfedl manner } or if a fiphon is filled, and then let under a receiver and the air exhaufted, if by any con¬ trivance the end of the lower leg is opened, it will im¬ mediately begin to run, and difeharge the water of any veflel in which the other leg is placed, as though it was in the open air. The caufe of this phenomenon, as well as the former, feems very difficult to be invefti- gated. Some philofophers have attempted a folution ir on a principle fomething fimilar to that of the luni- Another cular hypothefis of Linus above-mentioned j namely, folution. that “ fluids in fiphons feem as it w’ere to form one con¬ tinued body ; fo that the heavier part, defeending, like a chain pulls the lighter after it.” This might be deemed a fufficient explanation, if the fiphon were on¬ ly to empty the water it at firft contains in itfelf: Is but when we confider that the water in the veflel, InfufTi- which much exceeds the quantity contained in thecienU fiphon, isi likewife evacuated, this hypothefis can by no means be admitted $ becauie this would be like the lighter part of a chain pulling the heavier af¬ ter it. 13 Concerning the caufe of thefe lingular phenomena, Another w’e can only oflfer the following conjecture. The ex-|°lutl“’1> iftence of a medium much more fubtile than air, and n 0f which pervades the vacuum of an air-pump with the eic(qnc;t^ utmoll facility, is nowT fufficiently afeertained in the phenomena of eleftricity. It is alfo well known, that this fluid furrounds the whole earth to an indeterminate height. If therefore this fluid either is the power of gravity itfelf, or is aCted upon by that pow er, it mull neceflarily prefs upon all terreftrial bodies in a man¬ ner fimilar to the preflure of the atmofphere. If then we could from any vefiel entirely'exclude this fubtile fluid, and form an eleftrical vacuum, as well as we can do an aerial one by means of the air-pump, w e would in that cafe fee fluids as evidently raifed by the prelfure of the eleftric matter, as w’e now fee them raifed by that of the air. But though this cannot be done, we- are allured that there are certain fubftances, of which, glafs is one; through which the ele&iic matter cannot pa& ■ BAR [406 • pafs but with difficulty. We are likewife certain, that though the ele&ric matter paffes through the pores of wa¬ ter, metals, &c. with very great facility, yet it ftill muft meet with fome refiftance from their folid and impene¬ trable parts, which cannot be pervaded by any material fubftance. We know alfo, that all fubftances do na¬ turally contain a certain quantity of this ele&ric mat¬ ter, which they are not always ready to part with j and when by any means the fluid they contain is fet in mo¬ tion, they are then faid to ele&njied. Now, though we are certain, that the fridlion of glafs by mercury does fet in riiotion the elefhic fluid contained in the mercury or in the glafs \ yet when the tube is filled wdth the metallic fluid, whatever quantity has been extricated either from the glafs or mercury during the time of filling, will be reabforbed again by the me¬ tal and conveyed to the earth during the time of in- verfion; and confequently, the mercurial tube, when inverted, will not be electrified, but both glafs and mercury will be in their natural ftate. Here, then, the preffure of the electrical fluid is kept off in fome mea- fure from the upper part of the mercury by the glafs, which it cannot penetrate eafily at leaft. To the mercury in the balon it has free accefs, and therefore preffes more upon the lower than the upper part; the confequence of which is a fufpenfion of the mercury. It is true, this fluid very eafily penetrates the metallic matter*, but it muft be confidered, that the eleClric fluid itfelf is in fome meafure entangled in the particles of the quickfilver, and cannot be extricated without mo¬ tion. As foon therefore as the tube is (haken, fome part of the eleClricity is extricated, and the mercury begins to defcend. The fubtilty of the medium is fuch, that no fooner has it begun to extricate itfelf, than, by the motion of the metal downwards, it iffues forth in great quantities, fo as to become vifible, like a blue flame, in the dark. The equilibrium is therefore de- ftroyed in an inftant, as it would be were we to admit air to the top of the barometer 5 nay, in a more effec¬ tual manner. For if a fmall quantity of air was ad¬ mitted to the top of a barometer, the mercury wrould only defcend in proportion to the quantity of air ad¬ mitted ; but here, no fooner is a quantity of elecffric matter admitted, than it procures admiffion for a vaft deal more, and confequently the mercury defcends with accelerated velocity.—On this principle the afcent of water in the fiphon wffiile in vacuo is fo eafily accounted for, that we need not take up time in explaining it far¬ ther.—But why an inverted glafs tube Ihould remain full of mercury when it has a hole either great or fmall in the top, is more difficult to be accounted for, and requires this farther circumftance to be taken into con- fideration, viz. that though all folid bodies wall, by the aftion of gravity, or by any other impulfe, eafily approach very near to one another, yet they cannot be brought into abfolute contact without a very confider- able force, much greater than is fufficient to overcome their gravity ; and thus it appears from fome experi¬ ments, that the links of a chain are by no means in conta£l with one another, till the chain has a confider- able weight appended to it. This may be the cafe \vith the tube in queftion. The air by its gravity de- fcends upon it, and is ready to enter the fmall hole in the top *, but, by a repulfive power from the glafs, its ac¬ tion is prevented, fo that the mercury cannot fall. ] BAR It was, however, fome time after the Torricellian ex-Barometer, periment had been made, and even after it had been \ univerfally agreed that the fufpenfion of the mercury J4 was owing to the weight of the atmofphere, before it^j31^161, was difcovered that this preffure of the air was different prognofti_ at different times though the tube was kept in the fame eating the place. But the variations of altitude in the mercurial weatfier- column wrere too obvious to remain long unobferved ; and accordingly philofophers foon became careful enough to mark them. When this was done, it w*as impoffible to avoid obferving alfo, that the changes in the height of the mercury were accompanied, or very quickly fucceeded, by changes in the weather. Hence the. inftrument obtained the name of the weather-glafs, and rvas generally made ufe of with a view to the fore¬ knowledge of the weather. In this character, its prin¬ cipal phenomena are as follow : 1. The riling of the mercury prefages, in general, fair Its phenou. weather; and its falling, foul weather, as rain, fnow, menaasa high winds, and ftorms. weatlier- 2. In very hot weather, the falling of the mercury foreffiows thunder. 3. In winter, the riling prefages froft j and in frofty weather, if the mercury falls three or four divifions, there will certainly follow a thaw. But in a continued froft, if the mercury rifes, it will certainly fnow. 4. When foul weather happens foon after the falling of the mercury, expect but little of it j and, on the contrary, expe£t but little fair weather when it proves fair Ihortly after the mercury has rifen. 5. In foul weather, when the mercury rifes much and high, and thus continues for two or three days be¬ fore the foul v*eather is quite over, then expert a con¬ tinuance of fair weather to follow. 6. In fair weather, when the mercury falls much and low, and thus continues for two or three days before the rain comes, then expeft a great deal of wet, and probably high winds. 7. The unfettled motion of the mercury denotes un¬ certain and changeable weather. 8. You are not fo ftriftly to obferve the words en¬ graven on the plates (though in general it will agree with them), as the mercury’s r//f«§* andfalling. For if it ftand at much rain, and then rifes up to changeable, it prefages fair weather ; though not to continue fo long as if the mercury had rifen higher: and fo, on the con¬ trary, if the mercury ftood at fair, and falls to change¬ able, it prefages foul weather } though not fo much of it as if it had funk lower. I(^ Thefe are the obfervations of Mr Patrick, on w hich Remarks Mr Rowming makes the following remarks: “ From by Mr thefe obfervations it appears, that it is not fo much ^own’“?*. the height of the mercury in the tube that indicates the weather, as the motion of it up and down : where¬ fore, in order to pafs a right judgment of wffiat weather is to be expecled, we ought to know whether the mer¬ cury is aftually rifing or falling j to which end the fol¬ lowing rules are of ufe. “ 1. If the furface of the mercury is convex, ftand* • ing higher in the middle of the tube than at the fides, it is generally a fign that the mercury is then rifing. “ 2. If the furface is concave, it is then finking : and, “ 3. If it is plain, the mercury is flationary j or ra¬ ther, if it is a little convex : lor mercury being.put into BAR and frigid zones. * Philof. ‘TranfaSi. Is!0 320. Barometer, a gJafs tube, efpecially a {mall one, will naturally have its furface a little convex, becaufe the particles of mer¬ cury attract one another more forcibly than they are attracted by glafs. Further, “ 4. If the glafs is fmall, (hake the tube ; and if the air is grown heavier, the mercury will rife about half the tenth of an inch higher than it ftood before ; if it is grown lighter, it will fink as much. This pro¬ ceeds from the mercury’s flicking to the fides of the tube, which prevents the free motion of it till it is dif- engaged by the Ihqck : and therefore, when an obfer- vation is to be made with fuch a tube, it ought always to be {haken firft • for fometimes the mercury will not vary of its own accord, till the weather it ought to have indicated is prefent. Thefe phe Here we niuft obferve, that _the above-mention«d nomena pC-phenomena are peculiar to places lying at a confider- culiarto the able dillance from the equator ; for, in the torrid zone, temperate the mercury in the barometer feldom either rifes or falls much. In Jamaica, it is obferved by Sir Wil¬ liam Beelton that the mercury in the morning con- ftantly Hood at one degree below changeable and at noon funk to one degree above rain ; fo that the whole fcale of variation there was only of an inch. At St Helena, too, where Dr Halley made his obfervations, he found the mercury to remain wholly flationary whatever weather happened. Of thefe phenomena, their caufes, and wThy the barometer indicates an ap¬ proaching change of w7eather, the Dodlor gives us the following account: “ I. In calm weather, when the air is inclined to Phenomena rain, the mercury is commonly low. meter fol-°* ** 2‘ ^erene> S00^» and fettled weater, the mer¬ cury is generally high. “ 3. Upon very great winds, though they be not accompanied with rain, the mercury finks lowell of all, ■with relation to the point of the compafs the wind blows upon. “ 4. Cceterisparibus, the greateft heights of the mer¬ cury are found upon eallerly, or north-eafterly, winds. “ 5. In calm frolly weather, the mercury generally flands high. “ 6. After very great {forms of wind, when the mercury has been very low, it generally rifes again very fall. “ 7. The more northerly places have greater altera¬ tions of the barometer than the more foutherly. “ 8. Within the tropics, and near them, thofe ac¬ counts we have had from others, and my owm obferva¬ tions at St Helena, make very little or no variation of the height of the mercury in all w’eathers. “ Hence I conceive, that the principal caufe of the rife and fall of the mercury is from the variable winds which are found in the temperate zones, and whofe great inconftancy here in England is notorious. “ A fecond caufe is, the uncertain exhalation and precipitation of the vapours lodging in the air, where¬ by it comes to be at one time much more crowded than at another, and confequently heavier j but this latter depends in a great meafure upon the former. Now from thefe principles I fhall endeavour to explicate the feveral phenomena of the barometer, taking them in the fame order I have laid them down. Thus, “ 1. The mercury’s being lower inclines it to rain becaufe the air being light, the vapours are no longer [ 407 1 BAR 18 ved by Dr Halley. fupported thereby, being become fpecifically heavier Barometer, than the medium wherein they floated ; fo that they defcend towards the earth, and, in their fall, meeting with other aqueous particles, they incorporate toge¬ ther, and form little drops of rain : but the mercury’s being at one time lower than another, is the effe^l of two contrary winds blowing from the place where the barometer Hands ; whereby the air of that place is car¬ ried both ways from it, and confequently the incumbent cylinder of air is diminiihed, and accordingly the mer¬ cury finks : As, for inftance, if in the German ocean it Ihould blow a gale ot wefterly wind, and, at the fame time, an eallerly w ind in the Irilh fea ; or, if in France it fhould blow7 a northerly wind, and in Scotland a foutherly ; it mull be granted, that that part of the atmofphere impendant over England would thereby be exhauited and attenuated, and the mercury wmuld fub- fide, and the vapours which before floated in thefe parts of the air of equal gravity with themfelves would fink to the earth. “ 2. The greater height of the barometer is occa- fioned by two contrary wdnds blowing towards the place of obfervation, whereby the air of other places is brought thither and accumulated ; fo that the incum¬ bent cylinder of air being increafed both in height and weight, the mercury preJfed thereby mull needs Hand high, as long as the winds continue fo to blow; and then the air being fpecifically heavier, the vapours arc better kept fufpended, fo that they have no inclination to precipitate and fall down in drops, wdiich is the rea- fon of the ferene good weather which attends the greater heights of the mercury. “ 3. The mercury finks the lowed: of all by the very rapid motion of the air in llorms of wdnd. For the tradl or region of the earth’s furface, wherein the winds rage, not extending all round the globe, that ftagnant air which is left behind, as likewife that on the fides, cannot come in fo fall as to fupply the evacuation made by fo fwift a current •, fo that the air mull neceffarily be attenuated when and wdiere the faid winds continue to blow, and that more or lefs according to their vio¬ lence : add to which, that the horizontal motion of the air being fo quick as it is, may in all probability take oflf fome part of the perpendicular preffure thereof j and the great agitation of its particles is the reafon why the vapours are diffipated, and do not condenfe into drops fo as to form rain, otherwife the natural con- fequence of the air’s rarefadlion. “ 4. The mercury {lands highefi: upon the eafterly and north-eallerly wdnd ; becaufe in the great Atlantic ocean, on this fide the 35th degree of north latitude, the winds are almoil ahvays wellerly or fouth-weflerly y fo that whenever here the wind comes up at eaft and north-eaft, it is fure to be checked by a contrary gale as foon as it reaches the ocean j wherefore,, according to our fecond remark, the air mull needs be heaped over this ifland, and confequently the mercury mull Hand high as often as thefe wdnds blow. This holds true in this country; but is not a general rule for others, where the winds are under different circumftances : and I have fometimes feen the mercury here as low7 as 29 inches upon an eafterly wind ; but then it blew7 ex¬ ceedingly hard, and fo comes -to be accounted for by what was obferved in the third remark. “ 5. In calm frofty w7eather the mercury generally Hands BAR [408 Barometer, {lands high ; becaufe (as I conceive) it feldom freezes fore but when the winds come out of the northern and north-eaftern quarters, or at leaft unlefs thofe xvinds blow at no great diftance off. For the north parts of Germany, Denmark, Sweden, Norway, and all that tra£l from whence north-eaftern winds come, are fub- je£l: to almoft continual froft all the winter : and there¬ by the lower air is very much condenfed, and in that ftate is brought hitherward by thofe winds, and, being accumulated by the oppofition of the wefterly wind blowing in the ocean, the mercury muft needs be pref- fed to a more than ordinary height •, and as a concur¬ ring caufe, the fhrinking of the lower parts of the air into leffer room by cold, muft needs caufe a defcent of the upper parts of the atmofphere, to reduce the cavity made by this contraction to an equilibrium. “ 6. After great (forms, when the mercury has been very low, it generally rifes again very fail: I once ob- ferved it to rife one inch and a half in lefs than fix hours after a long-continued ftorm of fouth-weft wind. The reafon is, becaufe the air being very much rare¬ fied by the great evacuations which fuch continued {forms make thereof, the neighbouring air runs in the more fwiftly to bring it to an equilibrium ; as wTe fee water runs the fafter for having a greater decli¬ vity. “ 7. The variations are greater in the more north¬ erly places, as at Stockholm greater than at Paris (compared by M. Pafchal) ; becaufe the more north¬ erly parts have ufually greater (forms of wind than the more fouthcrly, wdiereby the mercury fhould fink low¬ er in that extreme; and then the northerly winds bringing in the more denfe and ponderous air from the neighbourhood of the pole, and that again being chec¬ ked by a foutherly wind at no great diftance, and fo heaped, muft of neceflity make the mercury in fuch cafe (land higher in the other extreme. “ 8. Laftly, this remark, that there is little or no variation near the equinodfial, does above all others confirm the hypothefis of the variable winds being the caufe of thefe variations of the height of the mercury ; for in the places above named there is always an eafy gale of wind blowing nearly upon the fame point, viz. F. N. E. at Barbadoes, and E. S. E. at St Plelena $ fo that there being no contrary currents of air to ex- hauft or accumulate it, the atmofphere continues much in the fame ftate: however, upon hurricanes, the moft violent of ftorms, the mercury has been obferv- ed very low; but this is but once in twro or three vears, and it foon recovers its fettled ftate, about 294- inches.” This theory has been controverted, and the princi¬ pal objedfions are, “ That if the wind was the foie agent in railing or deprefling the mercury, the altera¬ tions of its height in the barometer would be only re¬ lative or topical; there would (fill be the fame quanti¬ ty fupported at feveral places taken colledfiveiy : thus - what a tube at London loft, another at Paris, Pifa, or Zurich, &c. would gain. But the contrary is found to be the cafe •, for, from all the obfervations hitherto made, the barometers in feveral diftant parts of the globe rife and fall together. This is a very furprifing fiadl •, and deferves to be wTell examined. Again, fet- ting afide all other objedlions, it is impoflible, on Dr (Halley’s hypothefis, to explain the mercury’s fall be- 19 'Objections to this theory. ] BAR and rife after, rain. For fuppofe txvo Contrary Barometer, winds fweeping the air from over London : We know ~v Jn“~' that few if any of the winds reach above a mile high ; all therefore they can do will be to cut oft a certain part of the column of air over London : if the confe- quence of this be the fall of the mercury, yet there is no apparent reafon for the rains following it. The , vapours indeed may be let lower } but it will only be till they come into an air of the fame fpecific gravity with themfelves, -and there they will flick as before. Laftly, it is impoflible, according to the laws of fluids, that the air above any place could be exhaufted by the blowing of two contrary winds from it < for, fuppofe a nortb-eaft and fouth-Weft wind both blow from Lon¬ don at the fame time, there will be two others at the fame time blowing toxvards it from oppofite points, viz. a north-weft and !outh-eaft one, which will ex^ery mo¬ ment reftore the equilibrium, fo that it can never be loft in any confiderable degree at leaft.” 20 Mr Leibnitz accounted for the finking of the mer-Hypotheffe cury before rain upon another principle, viz. I hat asot Mr a body fpecifically lighter than a fluid, while it is fllT fpended by it, adds more weight to that fluid than when, by being reduced in its bulk, it becomes fpe¬ cifically heavier, and defeends ; fo.the vapour, after it is reduced into the form of clouds, and defeends, adds lefs weight to the air than before } and therefore the mercury falls. To which it is anfwered, 1. T hat when a body defeends in a fluid, its motion in a very . little time becomes uniform, or nearly fo, a farther acceleration of it being prevented by the refiftance of the fluid 5 and then, by the third laxv of nature, it t forces the fluid downwards with a force equal to that whereby it tends to be farther accelerated, that is, with a force equal to its whole weight. 2. 1 he mer¬ cury by its defcent foretels rain a much longer time before it comes, than the vapour after it is condenfed into clouds can be fuppoled to take up in falling. 3. Suppofing that as many vapours as fall in rain du¬ ring a whole year were at once to be condenfed into clouds, and even quite ceafe to gravitate upon the air, its gravity would fcarce be diminiftied thereby fo much as is equivalent to the defcent of txvo inches of mercu¬ ry in the barometer. Befides, in many places be¬ tween the tropics, the rains fall at certain feafons in very great quantities, and yet the barometer fhows there very little or no alteration in the weight of the atmofphere. ai Another hypothefis fomewhat fimilar to that of Leib- Another nitz has been given 1 but as it is liable to the objec-hypothehs tions juft now mentioned, efpecially the laft, we for- bear to give any particular account of it ; and (hall at¬ tempt, upon other principles, to give a fatisfa&ory fo- lution of this phenomenon. 2, The neceflary preliminaries to our hyprthefis are, Anothet 1. That vapour is formed by an intimate union between theory, the element of fire and that of water, by which the fire or heat is fo totally enveloped, and its action fo entirely fufpended by the xvatery particles, that it not only lofes its properties of giving light and of burning, but becomes incapable of afifeffing the moft fenfible thermometer •, in which cafe, it is faid by Dr Black, the author of this theory, to be in a latent ftate. For . the proofs of this, fee the articles Evaporation, Cold, Congelation, &c. 2. If the atmofphere is v ' affected BAR [ 4^9 ] BAR Bartmeter. affected by any unufual degree of beat, it thence be- 1 v ' comes incapable of fupporting fo long a column of mercury as before, for which reafon that in the baro¬ meter finks. This appears from the obfervations of Sir William Beefton already mentioned ; and likev/ife from thofe of De Luc, which fiiall be afterwards taken no¬ tice of. Thefe axioms being eftablifhed, it thence follows, that as vapofir is formed by an union of fire wdth wa¬ ter, or if we pleafe to call it an eletlive attraction be¬ tween them, or folution of the w7ater in the fire, it is impoflxble that the vapour can be condenfed until this union, attraction, or folution, be at an end. The be¬ ginning of the condenfation of the vapour then, or the firlt fymptoms of an approaching rain, mult be the fe- paration of the fire which lies hid in the vapour. This may be at firft flow and partial, or it may be hidden and violent J in the firft cafe, the rain will come on (lowly, and after a confiderable interval ; and in the other, it will be Very quick, and in great quantity. But Dr Black hath proved, that when fire quits its latent date, however long it may have lain dormant and infenfible, it always affumes its proper qualities again, and afteCts the thermometer as though it had never been abforbed. The confequence of this muft be, that in proportion as the latent heat is difcharged from the vapour, it muft fenfibly affeCt thofe parts of the atmofphere into which it is difcharged *, and in pro¬ portion to the heat communicated to thefe, they will become fpecifically lighter, and the mercury fink of courfe. Neither are we to imagine that the quantity of heat difcharged by the vapour is inconfiderable ; for Dr Black hath fhown, that when any quantity of water, a pound for inftance, is condenfed from the vapour of a common ftill, as much heat is communi¬ cated to the head and refrigeratory as would have been fufficient to heat the pound of water red hot, could it have borne that degree of fenfible heat. The caufes by wdiich this reparation between the fire and water is, or may be effected, come to be confider- ed under the articles Rain, Condensation, Vapour, &c. Here we have only to obferve, that as the repa¬ ration may be gradual and flow, the barometer may indicate rain for a confiderable time before it happens: or if the fenfible heat communicated from J»ke vapour to the atmofphere fhall be abforbed by*Trie colder parts, or by any unknown' means carried off, or pre¬ vented from affetfling the fpecific gravity of the air, the barometer will not be affefted ; and yet the water being deprived of the heat neceffary to fuftain it, muft defcend in rain ; and thus it is found that the indica¬ tions of the barometer do not always hold true. Hence alfo it appears, that though the fpecific gravity of the sir is diminifhed, unlefs that diminution proceeds from a difcharge of the latent heat contained in the vapours, no rain will follow *, and thus the finking of the baro¬ meter may prognofticate wind as w7ell as rain, or fome- times nothing at all. The difficulty, however, on this hypothefis, is to account for the barometer being ftationary in all wea¬ thers between the tropics ; whereas it ought to move up and down there as wrell as here, only more fudden- ly, as the changes of weather there are more hidden than here. But it muft be confidered, that in thefe climates, during the daytime, the a&ion of the fun’s Vol. HI. Part IL rays is fo violent, that -what is gained by the difcharge Barometer, of latent heat from the vapour, is loft by the interpofi- v—~"V" tion of the clouds betwixt the fun and earth, or by the great evaporation which is conftantly going on j and in the night, the cold of the atmofphere is fo much in- creafed, that it abforbs the heat as faft as the vapour difcharges it, fo that no fenfible effect can be produ¬ ced ; for in warm climates, though the day is excef- lively hot, the night is obferved to be vaftly colder in proportion than it is with us. This, however, does not prevent the barometer from being affefted by other caufes, as well as with us 5 for Dr Halley obferves, that in the time of hurricanes it finks very low. The caufe of this is moft probably a great commotion in the elec¬ tric fluid, by which the air is internally agitated, and its power of gravitation in part fulpended.—A confir¬ mation of the above hypothefis, however, is taken from the different heights at which the mercury arrives in different climates. The barometer range, for inftance, at the latitude of 450 is the greateft of all $ becaufe here the evaporation and condenfation of the vapours are both very confiderable, at the fame time that the latent heat difcharged cannot be abforbed fo fuddenly as in the torrid zone, the difference betwixt the length of the days and nights beiug greater, and confequently the nights warmer in fummer and colder in winter. Farther to the northward the range is lefs, and in the latitude of 6o° only two inches, by reafon of the great¬ er cold and length of the days and nights ; whence the quantity of vapour condenfed, or of latent heat expel¬ led, becomes proportionably lefs. Having thus given an account of the feveral pheno-different mena of the barometer confidered as a weather-glafs, kin(^s °* and likewife endeavoured to account for them in the moft fatisfadlory manner, we now proceed to give a particular defcription of the barometers moft common¬ ly made ufe of, with various fchemes for their improve¬ ment. Fig. I. reprefents the common barometer, fuch as Plate was invented by Torricelli, and fuch as we have al- BXXXV, ready given a general defcription of. AB reprefents a tube of glafs, a quarter of an inch in diameter, and 3 4 inches lon^, hermetically fealed at A. This tube being fuppofed to be filled with mercury, is then in¬ verted into the bafon CD ; upon which the mercury in the tube falls down to GH, fomewhat above 28 inches, while that in the bafon rifes to CF. The low- eft ftation of the mercury in this country is found to be 28 inches, and the higheft 31. From the furface of the mercury CF, therefore, 28 inches are to be mea- fured on the tube AB, which fuppofe to reach to the point K. This point, therefore, is the loweft of the fcale of variation, and in the common barometers is marked Jiormy. In like manner, the higheft point of the fcale of variation I, is placed 31 inches above EF j and is marked very dry on one fide for the fummer, and very hard frojl on the other for the winter. The next half inch below is marked yL? ^/h/r on the one fide, and fet frojl on the other. At 30 inches from CF is marked the word fair on one fide, and frof on the other. Half an inch below that, is wrote the wmrd changeable, which anfwers both for fummer and winter. At 29 inches is rain on the one fide, and fnow on the other ; and at 28^- are the -woxds tnuch rain on the one fide, and much fnow on the other. Each of thefe 3 F large BAR [41 Barometer, large divifions is ufually fubdivided into 10 and there —'v is a fraall Aiding index fitted to the inftrument, by which the afcent or defcent of the mercury to any number of divifions is pointed out. Each of thefe tenths is fometimes divided into ten more, or hundredths of an an inch, by means of a Aiding Aip of brafs with a ver¬ nier fcale on it, which fhall be hereafter defcribed and explained. This kind of barometer is the molt com¬ mon, and perhaps the molt ufeful and accurate, of any that has yet been invented, from the following circum- ftance, that the natural fimplicity of its conftrudtion, in preference to others hereafter delcribed, does not admit of any kind of refiftance to the free motion of the column of mercury in the tube. The fcale of va¬ riation being only three inches, and it being naturally wiAied to difcover more minute variations than can thus be perceived, feveral improvements have been thought of. The improvement moft generally adopted is the dia¬ gonal barometer reprefented fig. 2. in which the fcale of variation, inftead of three inches, may be made as many feet, by bending the tube fo as to make the up¬ per part of it the diagonal of a parallelogram of which the fhortefi: fide is the three-inches fcale of variation of the common barometer. This, however, has a very great inconvenience : for not only is the fridtion of the mercury upon the glafs fo much increafed that the height doth not vary with every Aight change of air j but the column of mercury is apt to break in the tube, and part of it to be left behind, upon any confiderable defcent. Fig. 3. is the rectangular barometer; where AC re- prefents a pretty wide cylinder of glafs, from which proceeds the tube CDF bent into a right angle at D. Suppofe now the cylinder AC to be four times larger than the tube CD, fo that every inch of the cylinder from C to A Aiould be equal in capacity to four inches of the tube CD. The whole being then filled with mercury, and inverted, the mercury will fubfide from A to B, at the fame time that it cannot run out at the open orifice F, becaufe the air preffes in that wTay. If any alteration then happens in the weight of the air, fuppofe fuch as would be fuAicient to raife the mer¬ cury an inch from B towards A, it is evident that this could not be done wdthout the mercury in the ho¬ rizontal leg retiring four inches from E towards D j and thus the fcale of variation counted on the horizon¬ tal leg would be 12 inches. But the inconveniences of frittion are much greater here than in the diagonal barometer j and befides, by the leaft accident the mer¬ cury is apt to be driven out at the open orifice F. The pendant barometer (fig. 4.) confifts of a fingle tube, fufper.ded by a firing faftened to the end A. This tube is of a conical or tapering figure, the end A being fomewhat lefs than the end B. It is herme¬ tically fealed at A, and filled with mercury : then will the mercury fink to its common Aation, and admit of a length of altitude CD, equal to that in the common barometers. But from the conical bore of the tube, the mercury will defcend as the air grows lighter, till it reaches its lowed: altitude, •when the mercury will Hand from the lower part of the tube B to E, fo that BE wdll be equal to 28 inches : confequently the mer¬ cury will, in fuch a tube, move from A to E, or 3 2 inches, if the tube be five feet, or 60 inches) and 0 ]* BAR therefore the fcale AE is here above ten times greater Barometer, than in the common barometer : but the fault of this —— barometer is, that the tube being of a very (mail bore, the friclion will be confiderable, and prevent its mov¬ ing freely ; and if the tube is made of a wider bore, the mercury will be apt to fall out. Fig. 5. is an invention of Mr Rowning, by which the fcale of variation may be increafed to any length, or even become infinite. ABC is a compound tube hermetically fealed at A, and open at C, empty from A to D, filled with mercury from thence to B, and from thence to E with water. Let GBH be a hori¬ zontal line j then it is plain from the nature of the fiphon, that all the compound Auid contained in the part from H to G, will be always in (equilibria with itfelf, be the weight of the air what it will, becaufe the prdTure at H and G muft be equal. Whence it is evident, that the column of mercury DH is in ce- quilibrio with the column of water GE, and a column of air taken conjointly, and will therefore vary with the fum of the variations of thefe. That the variation in this barometer may be infinite, will appear from the following computation. Let the proportion between the bores of the tube AF and FC be fuch, that when HD, the difference of the legs wherein the mercury is contained, is augmented one inch, GE, the difterence of the legs wherein the water is contained, fiiall be di- minifiied 14: then, as much as the prefiure of the mer- - cury is augmented, that of the water will be diminifihed, and" fo the prefiure of both taken together will remain as it was ; and confequently, after it has begun to rife, it will have the fame tendency to rife on, without ever coming to an equilibrium with the air. Fig. 6. reprefents Dr Hook’s wheel-barometer. Here ACDG is a glafs tube, having a large round head at A, and turned up at the lower end F. Upon the fur- face of the mercury in the bent leg is an iron ball G, wuth a firing going over a pulley CD. To the other end of the firing is faftened a fmaller ball H, which as the mercury rifes in the leg FG, turns the index KL from N towards M, on the graduated circle MNOP ) as it rifes in the other leg, the index is carried the con¬ trary way by the defcent of the heavier ball G, along with the mercury. The fri&ion of this machine, how¬ ever, unlefs it is made with very great accuracy, ren¬ ders it ufelefs. Fig. 7. is another barometer, invented by Mr Rowm- ing, in which alfo the fcale may be infinite. ABCD is a cylindrical veflel, filled with a fluid to the height W, in which is immerged the barometer SP confifiing of the following parts: The principal one is the glafs tube TP (reprefented feparately at //>), whofe upper end T is hermetically fealed : this end does not appear to the eye, being received into the lower end of a tin pipe GH, which in its other end G receives a cylin- dric rod or tube ST, and thus fixes it to the tube TP. This rod ST may be taken off, in order to put in its ftead a larger or a leffer as occafion requires. S is a ftar at the top of the rod ST *, and ferves as an index by pointing to the graduated Icale LA, which is fixed to the cover of the veffel ABCD. MN is a large cy¬ lindrical tube made of tin (reprefented feparately at mn), which receives in its cavity the fmaller part of the tube TP, and is well cemented to it at both ends, that none of the fluid may get in. The tube TP, with this apparatus, BAR [41 Barometer, apparatus, being filled with mercury, and plunged into bafon MP, which hangs by two or more wires upon the lower end of the tube MN, muft be fo poifed as to float in the liquor contained in the veffel ABCD 5 and then the whole machine rifes when the atmofphere be¬ comes lighter, and vice verfa. Let it npw be fuppofed, that the fluid made ufe of is water 5 that the given variation in the weight of the atmofphere is fuch, that, by nrefling upon the furface of the water at W, the furface of the mercury at X may be raifed an inch higher (meafuring from its furface at P) than before ; and that the breadth of the cavity of the tube at X, and of the bafon at P, are fuch, that by this afcent of the mercury, there may be a cubic inch of it in the cavity X more than before, and confequently in the bafon a cubic inch lefs. Now, upon this fuppofition, there will be a cubic inch of water in the bafon more than there was before j becaufe the water will fucceed the mercury, to fill up its place. Upon this account the whole machine wTill be rendered heavier than before by the weight of a cubic inch of water ; and therefore wfill fink, according to the laws of hydroftatics, till a cubic inch of that part of the rod WS, which was above the furface of the w ater at W, comes under it. Then, if w7e fuppofe this rod fo fmall, that a cubic inch of it {hall be 14 inches in length, the whole ma¬ chine will fink T4 inches lower into the fluid than be¬ fore 5 and confequently the furface of the mercury in the bafon wdll be prefled, more than it was before, by a column of water 14 inches high. But the preflure of 14 inches of water is equivalent to one of mercury; this additional preflure will make the mercury afcend at X as much as the fuppofed variation in the weight of the air did at firft. This afcent will give room for a fecond cubic inch of water to enter the bafon ; the ma¬ chine will therefore be again rendered fo much heavier, and will fubfide 14 inches farther, and fo on in infini¬ tum. If the rod wras fo fmall that more than fourteen inches of it were required to make a cubic inch, the variation of this machine would be negative wdth refpect to the common barometer; and inftead of coming nearer to an equilibrium with the air by its afcent or defcent, it W’ould continually recede farther from it : but if lefs than 14 inches of rod were required to make a cubic inch, the fcale of variation wTould be finite, and might be made in any proportion to the common one. Neither this nor the other infinite barometer have ever been tried, fo that how far they would anfwer the purpofes ■of a barometer is as yet unknown. Fig. 8. reprefents another contrivance for enlarging '"the fcale of the barometer to any fize.—AB is the tube of a common barometer open at B and fealed at A, fufpended at the end of the lever wduch moves on the fulcrum E.—CD is a fixt glafs tube, which ferves in place of the ciftern. This laft tube mull be fo w'ide as to allow the tube AB to play up and down within it.— AB being filled with mercury, is nearly counterbalanced by the long end of the lever. When the atmofphere becomes lighter, the mercury defcends in the long tube, and the furface of the mercury rifing in the ciftern puihes up the tube AB, which at the fame time becoming lighter, the lever preponderates, and points out the moft minute variations. Here too ihe iridion occafions inconveniences ; but this may be i ] BAR in fome meafure remedied by a Imall {hake of the ap- Barometer, paratus at each infpeclion. v 1 In the Philofophical Tranfa&ions, Mr Cafwell givC5 the following account of a barometer, which has been commended as a very accurate one : “ Let ABCD (Fig. 9.) reprefent a bucket of water, in which is the barometer e r e z 0 s m, which conlifts of a body ersm, and a tube e-zy 0 : the body and tube are both concave cylinders communicating with one another, and made of tin : the bottom of the tube zy, has a lead weight to fink it fo that the top of the body may juft fwim even with the furface of- the water by the addition of fome grain weights on the top. The water, when the inftrument is forced with its mouth downwards, gets up into the tube to the height j/z/. There is added on the top a fmall concave cylinder, which I call the pipe, to diftinguilh it from the bottom fmall cylinder which I call the tube. This pipe is to fuftain the inftrument from finking to the bottom : in is a wire ; ms, de, are two threads oblique to the furface of the water, which threads perform the office of diagonals : for that while the inftrument finks more or lefs by the attrac¬ tion of the gravity of the air, there, where the furface of the water cuts the thread, is formed a fmall bubble ; W’hich bubble afcends up the thread, -as the mercury in the common barometer afcends.” The dimenfions of this inftrument given there are, 21 inches for the circumference of the body, the alti¬ tude 4, each bafe having a convexity of inches. The inner circumference of the tube is 5.14 inches, and its length 44 ; fo that the whole body and tube will con¬ tain almoft 2^ quarts. The circumference of the pipe, that the machine may not go to the bottom on every fmall alteration of the gravity of the air, is 2.14 inches; according to which dimenfions, he calculates that it will require 44 grains to fink the body to the bottom, allowing it only four inches to defcend ; at the fame time that it is evident, that the fewer grains that are required to fink it to this depth, the more nice the barometer will be. He alfo calculates, that when the mercury in the common barometer is 304- inches high, the body with a weight of 44 grains on its top wrill be kept in (equilibria with the water ; but when the mercury ftands at 28 inches, only 19 grains can be fupported : and laftly, by computing the lengths of the diagonal threads, See. he finds, that his initru- ment is 1200 times more exaft than the common ba¬ rometer. The following are his obfervations on the ufe of it. 2, “ 1. While the mercury of the common barometer Mr Caf- is often known to be ftationary 24 hours together, thewefi’sot>- bubble of the new barometer is rarely found to ftand i£Tv,at,'?ns ftill one minute. . . „ barometer. “ 2. Suppofe the air’s gravity mcreafing, and ac¬ cordingly the bubble afeending ; during the time that it afcends 20 inches, it will have many fhort defeents of the quantity of half an inch, one, two, three, or more inches; each of which being over, it will afcend again. Thefe retroceffions are frequent, and of all va¬ rieties in quantity and duration ; fo that there is no judging of the general courfe of the bubble by a fingle infpeftion, though you fee it moving, but by waiting a little time. “ 3. A fmall blaft of wind will make the bubble 3 F 2 defcend; BAR [41 Barometer, defcend ; a blaft that cannot be heard in a chamber of w“''* ' the town will fenlibly force the bubble downward. The blafts of wind fenfible abroad, caufe many of the above-mentioned retroceffions or accelerations in the ge¬ neral courfe 5 as I found by carrying my barometer to a place where the wind was perceptible. “ 4. Clouds make the bubble defcend. A fmall cloud approaching the zenith, works more than a great cloud near the horizon. In cloudy weather, the bubble defcending, a break of the clouds (or clear place) approaching to the zenith, has made the bubble to afcend : and after that break had palled the zenith a conliderable fpace, the bubble again de- fcended. “ 5. All clouds (except one) hitherto by me ob- ferved, have made the bubble to defcend. But the o- ther day, the wind being north, and the courfe of the bubble defcending, I law to the windward a large thick cloud near the horizon, and the bubble Hill delcended : but as the cloud drew near the zenith, it turned the way of the bubble, making it to afcend *, and the bubble continued afcending till the cloud was all palled, after which it relumed its former defcent. It was a cloud that yielded a cold Ihower of fmall hail.” Thefe are the moll remarkable contrivances for the improvement of the common barometer : the lall, on account of its being fo exceedingly fenfible, and like- wife eafy of confhu£lion and portable, feems to de- ferve attention much more than the others, which are always the more inaccurate, and the lefs eafily moved, 2(j according to the enlargement of their fcale ; whereas Marine ba- this is feemingly fubjeft to no fuch inconvenience. It rometer by is evident, however, that none of thefe could be ufed Mr Hook. fea? on account of the undeady motion of the Ihip : for which reafon Dr Hook thought of conllrufting a barometer upon other principles. His contrivance was no other than two thermome¬ ters. The one was the common fpirit-of-wine thermo¬ meter, which is affedled only by the warmth of the air: the other, which adls by the expanlion of a bubble of air included, is afifedled not only by the ex¬ ternal warmth, but by the various weight of the atmo- fphere. Therefore, keeping the fpirit thermometer as a llandard, the excefs of the afcent or defcent of the other above it would point out the increafe or decreafe of the fpecific gravity of the atmofphere. This in- ftrument is recommended by Dr Halley, who fpeaks follows. “ It has been obferved by fome, that, in long keeping this indrument, the air includ¬ ed either finds a means to efcape, or depolites fome vapours mixed with it, or elfe for fome other caufe becomes lefs eladic, whereby in procefs of time it gives the height of the mercury fomewhat greater than it ought : but this, if it Ihould happen in fome of them, hinders not the ufefulnefs thereof, for that it may at any time very eafily be correfled by experi¬ ment, and the riling and falling thereof are the things chiefly remarkable in it, the jufl height being barely a curiolity. “ I had one of thele barometers with me in my late fouthern voyage, and it never failed to prognofiicate and give early notice of all the bad wreather we had, fo that I depended thereon, and made provifion ac¬ cordingly 3 and from my own experience I conclude. 27 Recom¬ mended by Dr Hal- ley. of 11 as 2 ] BAR that a more ufeful contrivance hath not for this long Barometer, time been offered for the benefit of navigation.” ——y——j Fig. 10. reprefents a kind of Chamber Barometer, or a complete inftrument for obferving in a fixed place, barometer fuch as a room, &x. the changes in the atmofphere. by Mr Wil- It is conftrudled by Mr W. Jones optician, London 3 ^am Jones* and confills of a barometer aimed. He obferved, that the ware fometimes found¬ ed as if it had been ofcillatory ; and that this happen¬ ed when a change was about to enfue in the atmo- fphere ; fo that he came to predid with confiderable accuracy when there was to be rain or fine weather. On making further experiments, it wms obferved, that « this w-ire was more exad, and its founds more diftind, when extended in the plane of the meridian than in other pofitions. The founds were more or lefs foft, and more or lefs continued, according t® the changes of wreather that were to follow 5 though the matter was not reduced to any accuracy, and probably is not capable of much. Fine weather, however, was faid to be announced by the founds of counter tenor, and rain by thofe of bafs. M. Volta was faid to have mounted 15 chords at Pavia, in order to bring this method to fome perfedion j but there are as yet no accounts of his fuccefs. ^ The portable barometer, as" already obferved, has Difficulties long been in ufe for the menfuration of acceflible alti- |n meafur- tudes ; and, in fmall heights, was found to be more ex- ad than a trigonometrical calculation, the mercury de- rometerf" fcending at the rate of about one inch for 8co feet of height to which it was carried : but, in great heights, the moft unaccountable differences wrere found betw-een the calculations of the moft: accurate obfervers ; fo that the fame mountain would fometimes have been made thoufands of feet higher by one perfon than another; nay, by the fame perfon at different times. All thefe 35 anomalies M. de Luc of Geneva undertook to account Removed for, and to remove ; and in this undertaking he per- b>' M- de filled with incredible patience for 20 years. The refult LuC‘ of his labour is as follow-s. The firft: caufe of irregularity obferved was a fault in the barometer itfelf. M. de Luc found, that two barometers, though perfedly alike in their appearance, did not ccrrefpond in their adion. This was owing to air contained in the tube. The air was expelled by boiling the mercury in them ; after which, the motions 37 of both became perfedly confonant. That the tubes MercuI7» may bear boiling, they muft not be very thick, the h°tT bt01iet 5 91 f r '732t 919^ 1 221 At 14184-f 1798A 19624 22X0 2 331 A 2583H 27°3tt 274it 2924^ From thi$ table we prefume the reader will be in¬ clined to entertain the mod: favourable opinion of the 3 G abilities BAR ' [ 418 1 BAR .barometer abilities and induftry of M. de Luc. Notwithftand- ing the amazing pains, however, which he has taken to T)cfcript;on remove every inaccuracy in the barometer, it did not of the molt remain entirely free from error ; nor in many inftances improved have the oblervations made by different perfons exactly vetlm/ent con'e^Pon^eh* Coniiderable improvements have been cd, ^ fuggefted by Colonel Roy and Sir George Shuck- burgh, &c. (fee Phi/. Pranf. vol. 67. and 68.) ; and put in execution, with improvements, by Mr Ramf- den, and other ingenious inftrument-makers in Lon¬ don. The following is a defeription of a very port¬ able one conftru£led by Mr William Jones of Holborn, which, from its principle, comprehends every advan¬ tage that M. de Luc’s inftrument poffeffes; in many particulars is exempted from the errors to which his is liable ; and is not fubjeft to be deranged by carriage or other motion. Fig. T2. is a reprefentation of the inftrument as en- clofed in its mahogany cafe by means of three metallic rings bbb : This cafe is in the form of a hollow cone divided into three arms or legs from a to c, and is fo carved in the inftde as to contain fteadily the body of the barometer : The arms, when feparated, form three firm legs or fupports for the barometer when making obfervations (fee ng. 13.): The inftrument is fufpended at the part g of the cafe, by a kind of improved gim¬ bals ; and therefrom, with its own weight, is fufficient- ly fteady in expofed weather. In that part of the frame where the barometer tube is feen (r?e), there is a long flit or opening made, fo that the altitude of the mer¬ cury may be feen againft the light, and the vernier piece a brought dowm to coincide with the edge of the mercury to the greateft poftible exaflnefs. When the inftrument is placed on its fupport, the ferew j6is to be let down in order that the mercury may fubfide to its proper height; and alfo a peg at /> muft be loofened, to give admiflion to the a£Hon of the external air upon the mercury contained in the box b. The adjuftment or mode of obferving what is called the %ero, or o, divifton of the column of mercury, is by the mercury being feen in the tranfparent part of the box b; the infide of which is a glafs tube or refervoir for the mercury, and an edge piece of metal fixed on the ex¬ ternal part of the box. The mercury is to be brought into contafl with the edge by turning the ferew^ to¬ wards the right or left as neceffary. The vernier piece at a that determines the altitude of the column of mercury, is to be brought down by the hand to a near contact, and then accurately adjufted by turning the ferew b at top of the inftrument. This barometer has ufually two dift’erent forts of feales inferted on it : that on the right at a e, \$ z. fcale of French inches from 19 to 31, meafured from the furface or Kero of the mercury in the box below, divided into 12th parts or lines, and each line fubdivided by the vernier into ten parts, fo that the height of the column of mercury may be afeertained to the 120th part of a French inch. The fcale which is on the other fide, or left of obferva- tion, is of the fame length 5 but divided into Englifh v inches, each of which is fubdivided into 20ths of an inch, and the vernier fubdivides each 20th into 25 parts; lo that the height of the mercury is hereby afeertained to the yoodth part of an Englifti inch (viz. 20 x 25=: 500). But this vernier is figured double for the con- veniency of calculation, viz. The firft 5 divifions are mar- Barometer, ked 10, the 20 marked 40, and the 25 marked 50 : then —v—^ each exaft divifion is reckoned as the two thoufandths of an inch, which amounts to the fame j for is the fame in value as —^o 0 °f an inch. A thermometer is always attached to the barometer, and indeed is indi- fpenfably neceffary : it is.faftened to the body at r, conn- ' terfunk beneath the furfac^ of the frame, which makes it lefs liable to be broken : the degrees of the thermo¬ meter are marked on two feales, one on each fide, viz. that of Fahrenheit and Reaumur, feales generally known: the freezing point of the former being at 32 and the latter at o. On the right-hand fide of thefe two feales there is a third, called a fcale of correction ; it is placed oppofitely to that of Fahrenheit, with the werds add and fubtraB : it ferves as a neceffary correction to the obierved altitude of the mercury at any given tempe¬ rature of the air Ihown by the thermometer. There are feveral other valuable pieces of mechanifm about the inftrument that cannot clearly be reprefented in the figure \ but what has already been faid, we pre¬ fume, is fufticient for the reader’s general information. For the manner of making the neceffary obfervations, and calculating the neceffary particulars deducible therefrom, a full information may be obtained from M. De Luc, Recherches fur les Modifications de I'Atmo- fphere, and the Philofophical Tranfa&ions, vol. 67. and 68. before cited. It may be neceffary to add here, that by very fmall additional contrivances to this inftrument, Mr Jones renders it equally ufeful for making obfervations at fea with any marine barometer that has hitherto been in¬ vented. This article may not be improperly concluded by an obfervation of Mr Magellan *, relative to a principal* Magd- caufe of error in barometrical meafurements. This Yitlans edition ftates to be owing to the inattention ofobfervers to the1^ cpn~ fipecifiic gravity of the mercury with w hich their baro-^‘*f Mt~ meters were made. If two barometers were both at Nor/fon 30 inches high, - and equally circumftanced in every Mercury. other refpedt, excepting only their fpecific gravity of the quickfilver •, fo that one be filled with the firft kind I have tried, viz. whofe fpecific gravity was—13,62 and the other rr 13,45. In this cafe, and in all pro¬ bability many of this kind have often occurred, the er¬ ror muft have been no lefs than 327 feet; becaufe the heights of the mercurial columns in each barome¬ ter muft: be in the inverfe ratio of their fpecific gravities : viz. 13,45 : 1362 : : 30: 30,379. Now the logarithm of 30:00477.1.2 T ditto of 30,379—4825.73 the difference is — 54-52 which difference ftiows, that there are 54.52 fathoms between one place and another, or 327 reel ; though in reality both places are on the fame level. “ But if the fpecific gravity of the mercury, in the two barometers, were as the two above alluded to of Bergman and Fourcroy ; viz. one of 14,110, and the other of 13,000, which may happen to be the cafe, as the heavieft is commonly reputed the pureft mercury ; on this fuppofition the error muft have amounted to 35,576 tcifes, or above 2134 feet and a half; becaufe j 3,000 : 14,110 : : 30 : 32,561. Now Barometer . Plate EXXX V. ca. JCf. 15ASALTES . -V • //< *4- * BAR [41 "Baron. Usfort' the logaiithm of 30—4771,21 and that of 32,561=5126,97 the difference 15=355,76 ; which fhows that the error ihouid amount to io many fathoms, or 3134.5 feet. BARON, a perfon who holds a barony. The ori¬ gin and primary import of this term is much con- tefted. Menage derives it from the Latin baro, wdiich w-e - find ufed in the pure age of that language for vir, aJlout or valia?it man ; whence, according to. this author, it was, that thofe placed next the king in battles were called bar ones, as being the braved; men in the army j and as princes frequently rewarded the bravery and fi¬ delity of thofe about them with fees, the word came to be ufed for any noble perfon who holds a fee imme¬ diately of the king. Ifidore, and after him Camden, take the word in its original fenfe, to fignify a mercen¬ ary foldier. Meflieurs of the Port Royal derive it from weight or authority. Cicero ufes the word baro for a ftupid brutal man ; and the old Germans make mention of bujfetting a baron, i. e. a villain ; as the Italians ufe the word barone to fignify a beggar. M. de Marca derives baron from the German bar, man, or freeman ; others derive it from the old Gaulifh, Celtic, and Hebrew languages } but the mod probable opinion is, that it comes from the Spanifh varo, n.fout, nobleperfon ; whence wives ufed to call their hufbands, and princes their tenants, barons. In the Salic lawr, as well as the lawrs of the Lombards, the word baron fig- nifies a man in the general \ and the old gloffary of Philomenes tranilates baron by man. Baron is more particularly ufed, among us, for a lord or peer of the lowed clafs 5 or a degree of nobi¬ lity next belowr that of a vifcount, and above that of a knight or baronet. In ancient records the wTord baron included all the nobility of England, becaufe re¬ gularly all noblemen were barons, though they had alfo a higher dignity. But it hath fometimes happened, that, when an ancient baron hath been raifed to a new degree of peerage, in the courfe of a few generations the two titles have defeended differently 5 one perhaps to the male defeendants, the other to the heirs general; whereby the earldom or other fuperior title hath fub- fided without a barony : and there are alfo modern in- dances, where earls and vifeounts have been created without annexing a barony to their other honours: fo that now the rule doth not hold univerfally that all peers are barons. The original and antiquity of barons has occafioned great inquiries among our Englidi antiquarians. The mod probable opinion is fuppofed to be, that they were the fame with our prefent lords of manors ; to which the name of court baron (which is the lord’s court, and incident to every manor) gives feme countenance. It js laid the original name of this dignity in England was vavaJJour^nMioh. by the Saxons was changed Xo thane, and by the Normans into baron. It may be colledled from John’s magna charta, that originally all lords of manors, or barons, had feats in the great council or parliament: but fuch is the deficiency of public records, that the fird precept to be found is of no higher date tnan the 49th year of King Henry III.; which, al¬ though it was iffued out in the king’s name, was nei- 9 ] BAR ther by his authority nor by his diredlion: for, not on- Baron, ly the king himfelf, but his fon Prince Edward, and *"v~“ mod of the nobility who dood loyal to him, were then prifoners in the hands of the rebellious barons ; having been fo made in the month of May preceding, at the battle of Lewes, and fo continued until the memor¬ able battle of Evelham, which happened in Augud the year following ; when, by the happy efcape of Prince Edward, he refeued the king and his adherents out of the hands of Simon Mountfort earl of Leiceder. It cannot be doubted but that feveral parliaments were held by King Henry III. and King Edward L; yet no record is to be found giving any account thereof (except the 5th of King Edward L), until the 22d year of the reign of the lad mentioned king. Before the 49th of Henry III. the ancient parlia¬ ments confided of the archbilhops, bilhops, abbots, earls, and barons. Of thefe barons there were two forts : the greater barons, or the king’s chief tenants, who held of him in capite by barony; and the leffer barons, who held of the fird military fervice in capite. The fornfer had fummons to parliament by feveral w rits ; and the latter (i. e. all thofe who were poffeffed of thirteen knights fees and a quarter) had a general fum¬ mons from the dieriff in each county. Thus things continued till the 49th of Henry HI. But then, in¬ dead of keeping to the old form, the prevailing powers thought fit to fummon, not all, but only thofe of the greater barons who were of their party ; and, indead of the leffer barons who came wdth large retinues, to fend their precepts to the dieriff of each county, to caufe two knights in every {hire to be chofen, and one or two burgeffes for each borough, to reprefent the body of the people refiding in thefe counties and boroughs ; which gave rife to the feparation into two houfes of parliament. By degrees the title came to be confined to the greater barons, or lords of parliament only j and there were no other barons among the peer¬ age but fuch as Were fummoued by writ, in refpeft of the tenure of their lands or baronies, till Richard IL fird made it a mere title of honour, by conferring it on divers perfons by his letters patent. See further on this . fubjeft the article Law. When a baron is called up to the houfe of peers by writ of fummons, the w'rit is in the king’s name, and he is directed to come to the parliament appointed to be held at a certain time and place, and there to treat and advife with his majedy, the prelates, and nobility, about the weighty affairs of the nation. The ceremo¬ ny of the admiffion of a baron into the houfe of peers is thus : He is brought into the houfe between two barons, who conduft him up to the lord chancellor, his patent or writ of fummons being carried by a king at arms, who prefents it kneeling to the lord chan¬ cellor, who reads it, and then congratulates him on his becoming a member of the houfe of peers, and in veds him with his parliamentary robe. The patent is then delivered to the clerk of the parliament, and the oaths are adminidered to the new peer, who is then condudted to his feat on the barons bench. Some ba¬ rons hold their feats by tenure. The fird w’ho was raifed to this dignity by patent was John de Beau¬ champ of Holt Cadle, created baron of Kiddermin- der in Worcederfliire, to him and his heirs male, by King Richard II. in the nth year of his reign. He 3 G 2 inveded BAR [ 420 ] BAR Barons, inverted him with a mantle and cap. The covonation- ^aron- , robes of a baron are the fame as an earl’s, except that he has only two rows of fpots on each flioulder. In like manner, his parliamentary robes have but two guards of white fur, with rows of gold lace. In other refpefts they are the fame as other peers. King Charles II. granted a coronet to the barons. It has fix pearls, fet at equal diftances on the chaplet. His cap is the fame as a vifcount’s. His rtyle is Right Honourable ; and he is ftyled by the king or queen, Right Trujly and Well Beloved. Borons by ancient tenure were thofe who held certain territories of the king, who ftill referved the tenure in chief to himfeif. We alfo read of barons by temporal tenure ; who are fuch as hold honours, caliles, manors, as heads of their barony, that is by grand fer- geanty ; by which tenure they w’ere anciently fum- moned to parliament. But at prefent a baron by te¬ nure is no lord of parliament, till he be called thither by wrrit. The barons by tenure after the Conqueft, were di¬ vided into tnajores and minores, and w ere fummoned accordingly to parliament ", the tnajores or greater ba¬ rons, by immediate writ from the king *, the tmnores, or leffer barons, by general writ from the high ftieriff, ■ at the king’s command. Anciently they diftinguifhed the greater barons from the lefs, by attributing high, and even fovereign jurif- diflion, to the former, and only inferior jurifdi&ion over fmaller matters to the latter. Barons of the Exchequer, the four judges to wdiom the adminiftration of jullice is committed, in caules be¬ tween the king and his fubjefts relating to matters concerning the revenue. They w-ere formerly barons of the realm, but of late are generally perfons learned in the laws. Their office is alfo to look into the ac¬ counts of the king, for wffiich reafon they have audi¬ tors under them. See Exchecluer. Barons of the Cinque-ports are members of the houfe of commons, eledled by the five ports, two for each port. See the article Cinque-ports. Baron and Feme, in the Englifh Lave, a term ufed for huffiaud and wufe, in relation to each other : and they are deemed but one perfon ; fo that a wife can¬ not be witnefs for or againft her hufband, nor he for or againft his wife, except in cafes of high treafon. Baron and Feme, in Heraldry, is when the coats of arms of a man and his wife are borne par pale in the fame efcutcheon, the man’s being always on the dexter fide, and the woman’s on the finifter •, but here the woman is fuppofed not an heirefs, for then her coat muft be borne by the hufband on an efcutcheon of pre¬ tence. BARON, Robert, a dramatic author, avho lived during the reign of Charles I. and the proteftorfhip of Oliver Cromwell. He received the earlier paits of his education at Cambridge, after which he became a member of the honourable fociety of Gray’s Inn. Du¬ ring his refidence at the univerfity, he wrote a novel called the Cyprian Academy, in which he introduced the two firft of the dramatic pieces mentioned below. The third of them is a much more regular and perfect play, and was probably written when the author had attained a riper age. The names of them are, 1. Dco- rum Dona, a mafque. 2. Gripus and llegio, a pafto- ral. 3. Mir%a, a tragedy. Mr Baron had a great Baronet, intimacy with the celebrated Mr James Howell, the Baronets. great traveller, in wffiofe colleftions of Letters * there ^ Voj — is one to this gentleman, who was at that time at Pa-LCt 41S. ris. To Mr Howell in particular, and to all the la¬ dies and gentlewomen in England in general, he has dedicated his romance. BARONET, a dignity or degree of honour next beneath a baron, and above a knight-, having prece¬ dency of all knights excepting thofe of the garter, and being the only knighthood that is hereditary. The dignity of baronet is given by patent, and is the loweft degree of honour that is hereditary. The order -was founded by King James I. at the fuggeflion of Sir Robert Cotton, in 1611, when 200 baronets were created at once •, to which number it was intend¬ ed they fhould always be reftrained : but it is now en¬ larged at the.king’s pleafure, without limitation. They had feveral confiderable privileges given them, with an habendam to them and their heirs male. They were allowed to charge their coat with the arms of Ulfter, which are, in a field argent, a finifter hand, gules; and that upon condition of their defending the province of Ulfter in Ireland againft the rebels, who then harafled it extremely : to which end they were each to raife and keep up 30 foldiers at their own ex¬ pence for three years together, or to pay into the ex¬ chequer a fum fufficient to do it ; which, at 8d. per day per head, was 1095I.' So that, including fees, the expence of this dignity may be about 1 200I. fter- ling. To be qualified for it, one muft be a gentle¬ man born, and have a clear eftate of 1000I. per an¬ num. Baronets take place according to the dates of their patents \ by the terms of which no honour is to be erebled between barons and baronets. The title Sir is granted them by a peculiar claufe in their patents, though they be not dubbed knights : but both a baro¬ net, and his eldeft fon, being of full age, may claim knighthood.—The firft baronet who was created was Sir Nicholas Bacon of Redgrave in Suffolk, whofe fucceffor is therefore ftyled Primus Baronetorum An- gliee. Baronets of Scotland, called alfo Baronets of Nova Scotia. The order of knights baronets was alfo de- figned to be effabliftied in Scotland in the year 1621, by King James I. for the plantation and cultivation of the province of Nova Scotia in America but it was not actually inftituted till the year 1625 by his fon Charles I. when the firft perfon dignified with this title was Sir Robert Gordon of Gordonftone, a younger fon of the earl of Sutherland. The king granted a cer¬ tain portion of land in Acadia or New Scotland, to each of them, which they were to hold of Sir William Alexander (afterwards earl of Stirling), for their en¬ couragement who fhould hazard their lives for the good and increafe of that plantation, with precedency to them, and their heirs-male for ever, before all knights called equites aurati, and all leffer batons called lairds, and all other gentlemen, except Sir William Alexan¬ der his majefty’s lieutenant in Nova Scotia, his heirs, their wives and children 5 that the title of Sir Ihould be prefixed to their Chriftian name, and Baronet added to their furnarne } and that their own and their eldeft: fons wives Ihould enjoy the title of Lady, Madam, or Dame. BAR [42 Baronets, Dame.—His majefty was fo defirous of adding every Baroni. mar]^ 0f dignity to this his favourite order, that, four years after its inftitution, he iffued a royal warrant, granting them the privilege of wearing an orange rib¬ bon and a medal •, which laid was prefeuted to each of them by the king himfelf, according to the words of the warrant. All the privileges of the order, particu¬ larly this of wearing the medal, were confirmed at the king’s requefl by the convention of eftates in the year 16^0 ; and in order to eflablifh them on the molt fo- lid foundation, they were again confirmed by an aft of the parliament of Scotland in the year 1633. This mark of diftinftion fell to the ground with all the other honours of Scotland during the ufurpation of the long parliament and of Oliver Cromwell. It conti¬ nued in general, though not total, difufe after the Re- ftoration. There have been former meetings of the or¬ der to revive the ufe of it, one in the year and another in 1734. Thefe meetings proved ineffeftual, becaufe the proper Heps towards its revival were not taken ■, but, under the aufpices of our illuflrious mo¬ narch George III. fuch meafures were concerted in the year 1775 as have effeftuaily eftablifhed this honour¬ able dignity. Baronets of Ireland. This order was likewife in- flituted by King James I. in the 18th year of his reign for the fame purpofe and with the fame privileges with¬ in the kingdom of Ireland, as he had conferred on the like order in England ; for which the Irifh baronets paid the fame fees into the treafury of Ireland. The fir ft of that kingdom who was advanced to this here¬ ditary dignity was Sir Francis Blundell, then fecreta- ry for the affairs of Ireland. Since his time, feveral have been created, no number being limited. BARONI, Leonora, a celebrated finger and com- pofer, was born at Naples, but fpent the greateft part of her life at Rome. She was daughter of Adriana Baroni of Mantua, baronefs of Pian-caretta ; a lady alfo diftinguiihed for her mufical talents, and for her beauty furnamed the fair. Leonora had lefs beauty than her mother ; but excelled her in her profound Ikill in mufic, the finenefs of her voice, and the charm- ingnefs of her manner. She is faid by Mr Bayle to have been one of the fineft fingers in the world. She was, as well as her mother, celebrated by the wits, who ftrove to excel each other in recording her prai- fes ; and in 1639 there was publiftied, at Bracciano, a colleftion of Latin, Greek, Italian, Spanifti, and French poems addreffed to h.er, under this title, At>- plaufi Poetici alle Gloria della Signora Leonora Baroni. Among the Latin poems of Milton are no fewer than three entitled Ad Leonoram Romce canentem, wherein this lady is celebrated for her finging, with an allufion to her mother’s exquifite performance on the lute. A fine eulogium on this accompliftred woman is contain¬ ed in a difeourfe on the Mufic of the Italians, printed with the life of Malherbe, and fome ether treatifes at Paris, 1672, in 1 2tno. This difeourfe was compofed by M. Maugars prior of St Peter de Mac, the king’s interpreter of the Englifti language, and befides io fa¬ mous a performer on the viol, that the king of Spain and fever;d other fovereign princes of Europe defired to hear him. The charafter given by this perfon of Leonora Baroni is as follows : “ She is endowed with fine parts) fire has a very good judgment to diftinguifh i ] BAR good -from bad mufic •, (he underftands it perfeftly vvell, Baromus, , and even compofes 5 which makes her ablolute miftrefs . ^ i. of what ihe fings, and gives her the moft exaft pro¬ nunciation and expreftion of the fenfe ol her words. She does not pretend to beauty, neither is fhe difa- greeable or a coquet. She fings with a bold and ge¬ nerous moAfty, and an agreeable gravity j her voice reaches a large compafs of notes, and is exaft, loud, and harmonious; Ihe foftens and raifes it without {training or making grimaces. Her raptures and fighs are not lafeivious ; her lookshaving nothing impudent, nor does fhe tranfgrefs a virgin modefty in her geftures. In palling from one key to another, (lie {hows fome- times the divifions of the enharmonic and chromatic kind with fo much art and fweetnefs, that every body is raviihed with that fine and difficult method of fing¬ ing. She has no need of any perfon to aflift her with a theorbo or viol, one of which is neceffary to make her finging complete 5 for file plays perfeftly well her- felf on both thefe inftruments. In fihort, 1 have had the good fortune to hear her fing feveral times above- go different airs, with fecond and third ftanzas com¬ pofed by herfelf. I muft not forget to tell you, that one day ftie did me the particular favour to fing with her mother and her lifter. Pier mother played upon the lute, her lifter upon the harp, and herfelf upon the theorbo. This concert, compoled of three fine voices, and of three different inftruments, fo powerful¬ ly tranfported my fenfes, and threw me into fuch rap¬ tures, that I forgot my mortality, and thought myfelf already among the angels enjoying the felicity of the bleffed.” B ARONIUS, Cajsar, a pious and learned cardi¬ nal, was born at Sore in 1538. He ftudied at Rome, - and put himfelf under the dilcipline of St Philip de Ne- ri. In 1593, he was made general of the congregation of the Oratory by the refignatien of the founder Philip de Neri. Pope Clement VIII. made him his confeffor, and created him a cardinal in 159^* was after* wards made librarian to the Vatican j and died in 1605, at 68 years of age. He wrote feveral works, the prin¬ cipal of which is his Annales Ecclefiafici, from A. D. I to 1198, in 12 vols folio 5 which has been abridged by feveral perfons, particularly by Henry Spondfeus, Bzovius, and Ludovico Arelio. BARONY, Baron 1 a, or Baronaginm, the lord- fhip or fee of a baron, either temporal or fpiritual: In which fenfe barony amounts to the fame with what is otherwife called honour. A barony may be confidered as a lordlhip held by fome fervice in chief of the king, coinciding with what is otherwife called grandfedgeanty. Baronies, in their firft creation, moved from the king himfelf, the chief lord of the whole realm, and could be holden imme¬ diately of no other lord. For example, the king en¬ feoffed a man of a great feigneurie in land, to hold to the perfon enfeoffed and his heirs, of the king and his heirs, by baronial fervice \ to wit, by the lervice of 20, 40, 60 knights, or of fuch other number of knights, either more or fewer, as the king by his en¬ feoffment limited or appointed.—In the ages next after the Conqueft, when a great lord was enfeoffed by the king of a large feigneurie, fuch feigneurie was called a barony, but more commonly an honour; as, the honour of Gloucefterftiire, the honour of Wallingford, the ho¬ nour barony II 'Barraba. BAR [ 42 nuur of Lancafter,^ the honour of Richmond, and the like. I here were in England certain honours, which 'vere. often called by Norman or other foreign names • that is to fay, fometimes by the Englilh and'fometimes’ by the foreign name. This happened when the fame penon was lord of an honour in Normandy, or feme other foreign country, and alfo of an honfflir in En°-. land. For example, William de Forz, de Force, or de Fortibus, was lord of the honour of Albemarle in Normandy he was alfo lord of two honours in Eng¬ land ; to wit, the honour of Holdernefs. and the ho¬ nour of Skipton in Cravene. Thefe honours in Eng¬ land were fometimes called by the Norman name, the honour of Albemarle, or the honour of the earl of Albemarle. In like manner, the earl of Britannic was ord or the honour of Britannic in France, and alfo of the honour of Richmond in England: the honour of Richmond was fometimes called by the foreign name the honour of Britannic, or the honour of the earl of britanme. This ferveth to explain the terms “honour of Albemarle in England,” honor Albemarlice, or cornu fis Albemarlice rn Anglia ; honor Brit an nice, or com it is bn tan nice in Athglia, “ the honour of Britannic,” or the earl of Britannic in England.” Not that Al- bemarle or Britannic were in England, but that the fame perfon refpeaively was lord of each of the faid honours abroad and of each of the faid honours in England. The baronies belonging to bifhops are by iome called regalia, as being held folely on the kina’s liberality. 1 hefe do not confilf in one barony alone, but in many j for tot erant baronice, quot tnaiora pree- dia. 1 _ barony, according to Brafton, is a right indivi- fible. Wherefore, if an inheritance be to be divided among coparceners, though fome capital mefluages may be divided, yet if the capital meffuage be the "head of a county or barony, it may not be parcelled : and the reafon is, left by this divifion many of the rights of counties and baronies by degrees come to nothing, to the prejudice of the realm, which is faid to be com- pofed of counties and baronies. BARRA, or Barray, ifland of. See Bar.ray. Barra, in Commerce, a long-meafure ufed in Por¬ tugal and fome parts of Spain, to meafure woollen cloths, linen cloths, and ferges. There are three forts- the barra of Valencia, 13 of which make 12^ yards Englilh meafure; the barra of Caftile, 7 of which make £4 yards; and the barra of Aragon, 3 of which make 24 yards Englilh. . BARRABA, Desert of; a traft of land in Sibe- ria, lying between the rivers Irtis and Oby, in the pro¬ vince of Tobollk. It is uninhabited, but not through any deficiency of the foil ; for that is excellent for Ullage, and part of it might alfo be laid out in mea¬ dows and paftures.^ . It is interfperfed with a great number lakes, which abound with a fpecies of earn called by the neighbouring people harawfehen; and the country produces great numbers of elks, deer, foxes, ermine, and fquirrels. Between the Irtis and Oby are fome rich copper-mines; particularly on a mountain called Piblowa, from the piEla or white firs that grow upon it. Every hundred weight of the ore found here yields 12 pounds of pure copper; and there iS no occafion for digging deep in order to come at it. t‘lefe ores5 befides being very rich in copper, B array. ] BAR yield a great deal of filver, which affords fo much gold Barracan as makes rich returns for the trouble and expence of ^ extrafting it. BARRACAN, in Commerce, a fort of ftuff, not dia¬ pered, fomething like camblet, but of a coarfer grain. It is ufed to make cloaks, furtouts, and fuch other gar¬ ments, to keep oft the rain.-—The cities where the moft barracans are made in France are Valenciennes, Lille, Abbeville, Amiens, and Roan. Thofe of-Valenciennes are the moft valued : they are all of wool, both the warp and the woof. BARRACIDA, a fpecies of pike. See Esox, Ich¬ thyology Index. BARRACKS, or Baracks, places for foldiers to lodge in, efpecially in garrifons.—Barracks, when damp, are greatly prejudicial to the health of the foldiers lodged in them ; occafioning dyfenteries, intermitting evers, coughs, rheumatic pains, &c. For which rea- fon, quarter-mafters ought to be careful in examining every barrack offered by the magiftrates of a place; rejeding all ground-floors in houfes that have either been uninhabited, or have any figns of moifture. BARRA I OR, or Barretor, in Law, a perfon guilty of barretry. See Barretry. Lambert derives the word barretor from the Latin balatro, a vile knave ;” but the proper derivation is from the French barrateur, i. e. “ a deceiver;” and this agrees with the defeription of a common barretor in my Lord Coke’s report, viz. that he is a com¬ mon mover and maintainer of fuits in difturbance of the peace, and in taking and detaining the pofleflion of houfes and lands or goods by falfe inventions, &c. And therefore it was adjudged that the indidment a- gainft him ought to be in thefe words, viz. That he is communis malefaRor, calumniator, et feminator litium et difeordiarum inter vicinos fuos, et pads regis pertur- bator, &c. And there it is faid that a common barre¬ tor is the moft dangerous oppreffor in the law-, for he opprefleth the innocent by colour of law, which w as made to proted them from oppreftion. BARRATRY, in Law. See Barretry. Barratry, in a fhipmafter, is his cheating the owm'ers. If goods delivered on fhip-board are em¬ bezzled, all the mariners ought to contribute to the fatisfadion of the party that loft his goods, by the maritime law; and the caufe is to be tried in the ad¬ miralty. In a cafe where a fhip was infured againft the barratry of the mafter, &c. and the jury found that the fhip was loft by the fraud and negligence of the mafter, the court agreed, that the fraud w>as barratry, though not named in the covenant; but that negli¬ gence wras not. BARRAUX, a fortrefs of Dauphiny, belonging to France. It ftands in the valley of Giefivaudan, and w-as built by a duke of Savoy in 1597. The French took it in 1598, and have kept it ever fince. It is feated on the river Ifer, in E. Long. 4. 35. N. Lat. 45. o. BARRAY, or Barra, one of the Weftern iftes, in the county of Invernefs, Scotland; is eight miles in length, and four in breadth. The foil in general is thin and fit only for pafture, but in fome places it pro¬ duces corn and. potatoes. The population amounts to 1604. The inhabitants are chiefly employed in the cod and ling filhery, which is here very fuccefsful. In the BAR [ 423 ] BAR Barre tlie year 1787 they carried 30,000 ling to the Glafgow I! market. The fifh ;s carried to market in the fame , boat in which it is taken, either by going round the mull of Cantire, or drawing the boat by horfes acrofs the ifthmus of Tarbet. There is a good harbour in the north-eaft fide. Some cattle are reared in the ifiand, and a little kelp is burned on the fhore. BARRE, Louis Francois Joseph de la, of Tournay, author of feveral works printed at Paris. Amongft others, Imper. Orienta/e, Recucil des Medail- les des Empereurs, “ Memoirs for the hiftory of France,” &c. He died in 1738. BARREL, in Commerce, a round veffel, extending more in length than in breadth, made of wood, in form of a little tun. It ferves for holding feveral forts of merchandife. Barrel is alfo a meafure of liquids. The Englifir barrel, wine meafure, contains the eighth part of a tun, the fourth part of a pipe, and one half of a hogfiiead ; that is to fay, it contains 31^ gallons: a barrel, beer- meafure, contains 36 gallons*, and ale-meafure 32 gal¬ lons. The barrel of beer, vinegar, or liquor preparing for vinegar, ought to contain 34 gallons, according to the fiandard of the ale-quart. Barrel alfo denotes a certain weight of feveral merchandifes, which differs according to the feveral commodities. A barrel of Effex batter weighs 106 pounds; and of Suffolk butter, 256 pounds. The barrel of herrings ought to contain 32 gallons wine meafure, which amount to about 28 gallons old ftand- ard, containing about 1000 herrings. The barrel of falmon mull contain 42 gallons ; the barrel of eels the fame. The barrel of foap muff weigh 2 $;61b. Barrel, in Mechanics, a term given by watch¬ makers to the cylinder about which the fpring is wrapped 5 and by gunfmiths to the cylindrical tube of a gun, piffol, &c. through which the ball is dif- charged. Barrel, in Anatomy, a pretty large cavity behind the tympanum of the ear, about four or five lines deep, and five or fix wide. Fire Barrels. See Fire Ship. _ Thundering Barrels, in the military art, are filled with bombs, grenades, and other fire-works to be roll¬ ed down a breach. BARRENNESS, the fame with fterility. See Ste¬ rility. BARRETRY , in Taw, is the offence of frequently exciting and ftirring up fuits and quarrels between his Majefty’s fubjects, either at law or otherwife. The punilhment for this offence, in a common perfon, is by fine and imprifonment: but if the offender (as is too trequently the cafe) belongs to the profefiion of the law*, a barretor who is thus able as well as willing to do mifchief ought alfo to be difabled from praftifing lor the future. And indeed it is enacted by ftatute 12 Geo. I. c. 29. that if any one, who hath been convicted of forgery, perjury, Subornation of per¬ jury, or common barretry, fhall pradtife as an attor¬ ney, folicitor, or agent, in any fuit ; the court, upon complaint, fhail examine it in a fummary way ; and, if proved, fhall airedt the offender to be tranfported for feven jears. Hereunto alfo may be referred another offence, of equal malignity and audacioufnefs ; that of fuing another in the name of a fiaiticus plaintiff, ei¬ ther one not in being at all, or one who is ignorant of Barricade the fuit. This offence, if committed in any of the ^ .1! king’s fuperior courts, is left, as a high contempt, to f1'irr!llgton° be punifhed at their diferetion : but in courts of a ^ lower degree, where the crime is equally pernicious, but the authority of the judges not equally extenfive, it is directed by ftatute 8 Eliz. c. 2. to be punifhed by fix months imprifonment, and treble damages to the party injured. BARRICADE, or Barricado, a military term for a fence formed in hafte with veffels, bafkets of earth, trees, pallifades, or the like, to preftrve an ar¬ my from the fhot or affault of the enemy.—The moft ufual materials for barricades confift of pales or flakes, croffed with batoons, and fhod with iron at the feet, ufually fet up in paffuges or breaches. Barricade, in Isavai ArchiteClurc, a ftrong wood¬ en rail, fupported by ftanchions, extending acrofs the foremoft part of the quarter-deck. In a veffel of war, the vacant fpaces between the ftanchions are common¬ ly filled with rope-matts, cork, or pieces of old cable ; and the upper part, which contains a double rope¬ netting above the rail, is fluffed with full hammocks to intercept the motion, and prevent the execution of fmall-fhot in the time of battle. BARRIER, in Fortification, a kind of fence made at a paffage, retrenchment, &c. to flop up the entry thereof. It is compofed of great flakes, about four or five feet high, placed at the diftance of eight or ten feet from one another, with tranfums, or overthwart raft¬ ers, to flop either horfe or foot, that would enter or rufh in with violence : in the middle is a moveable bar of wood, that opens or fhuts at pleafure. A barrier is commonly fet up in a void fpace, between the citadel and the town, in half moons, &c. Barriers, fignifies that which the French calf jeu-' de barres, i. e. pal&flra ; a martial exercife of men armed and fighting together with fhort fwords, within, certain bars or rails which feparated them from the fpeffators : it is now difufed in this country. BARRING a vein, in Farmery, an operation per¬ formed upon the veins of a horfe’s legs, and other parts of his body, with intent to flop the courfe, and leffen the quantity, of the malignant humours that pre¬ vail there. BARRINGTON, John Shute, Lord Vifcount Barrington, a nobleman diftinguifhed for theological learning, was the youngeft fon of Benjamin Shute, merchant, and was born in 1678. He received part of his education at the univerfity of Utrecht ; and, af¬ ter returning to England, ftudied law in the Inner I emple. In 1701 he commenced writer in favour of the civil rights of Proteftant diffenters, to which body he belonged. At the recommendation of Lord So¬ mers he was employed to engage the Prefbyterians in Scotland to favour the union of the two kingdoms y and in 1708, for this fervice, was appointed to the place of commiflioner of the cuftoms. From this he was removed by the Tory miniftry of Queen Anne ; but his fortune was, in the mean time, improved by the bequeft of two confiderable eftates ; one of them left him by Francis Barrington of Tofts, Efq. whofe- name he affumed by a£l of parliament. Mr Barring¬ ton now flood at the head of the Diffenters. On the- acceffion of George I. he was returned member o£ parliament BAR [ 424 ] BAR Barrington, parliament for Berwick-upon-Tweed; and in 17^0 w“— the king railed him to the Irifh peerage, by the ityle of Vilcount Barrrington of Ardglals. He w7as unfortu¬ nately engaged as fub-governor in one of the bubbles of the time, the Harburgh lottery, and underwent the difgrace of expulfion from the houfe of commons, in 1723; a cenfure which was thought greatly too feyere, and altogether unmerited on his part. In 1725 he pub- lilhed his principal work, entitled Mifcellanea Sc era, or a new Method of confidering fo much of the Hiftory of the Apoftles as is contained in Scripture, in an ab- ftradf of their hiftory, an abftradt of that abftraft, and four critical effays ; 2 vols. 8vo. This work traces the methods taken by the firft preachers of the gofpel for propagating Chriftianity, and explains the feveral gifts of the Spirit, by which they were enabled to dil- charge their office. It has always been reckoned a valuable and judicious defence of the Chriftian cauie ; and w7as reprinted w'ith additions and eorre&ions, in 3 vols. 8vo, 1770, by his fon, afterwards bifhop of Durham. In the fame year he publiftied “ An Eflay on the feveral Difpenfations of God to Mankind, in the Order in which they lie in the Bible, &c.” 8vo, 1725. He wrote various other tradls, chiefly on fub- je6ts relative to toleration in matters of religion. He died in 1734, in his 56th year, leaving feveral chil¬ dren, of W’hom five fons had the uncommon fortune of riling to high ftations in the church, the law, the army, and the navy. Lord Barrington was a friend and difciple of Locke, and adopted his fentiments as to the right and advantage of free enquiry, and the va¬ lue of civil and religious liberty. He contributed greatly to the riling fpirit of liberal fcriptural criti- cifm among thofe who wffftied to render religion ra- lional. He rvas a man of great moderation, and, though chiefly connefted with the Diflenters, he occafionally frequented and communicated with the eftablilhed church. Gen. Biog. Barrington, Dames, fourth fon of Lord Vif- count Barrington, diftinguilhed as an antiquarian and naturalift, w7as educated for the profeflion of the law ; and, after poffefling various polls, was appointed a Welfti judge in 1757, and afterwards fecond juftice of Chefter. He never rofe to much eminence at the bar, but he fhowed his knowledge of the law as an objeft of liberal ftudy, by a valuable publication entitled “ Obfervations on the Statutes, chiefly the more an¬ cient, from Magna Charta to 21 James I. c. 27 ; with an Appendix, being a Propofal for new-modelling the Statutes,” 410, 1766. This work has been quoted with great refpefl by many of our hiftorians and con- ftitutional antiquaries. In 1773 he publilhed an edi¬ tion of Orojhts, wfith Alfred’s Saxon verlion, and an Englilh tranflation and notes of his own, which met with fome fevere animadverfion from the critics. His “ Trafts on the Probability of reaching the North Pole,” 1775, 4to> were written in confequence of the northern voyage of difeovery undertaken by Captain Phipps (now Lord Mulgrave). He accumulates in them a variety of evidence favourable to his own opi¬ nion of the practicability of attaining the object in which that voyage failed ; but there is little proba¬ bility that the attempt will be renewed. Mr Bar¬ rington’s other writings, which are numerous, arc chieflv to be found in the publications of the Royal 1 and Antiquarian Societies, of both of which he was Barringto- long an afliduous member, and of the latter, vice pre- nia fident. They relate to a variety of topics in natural parj0S hiftory and antiquities, and (how great induftry and * - - - ■ extent of relearch, though w'ith an occafional leaning to Angularity and paradox. Many of his traffs were collefted by hirn in a qto volume entitled “ MifceL lanies on various Subjefts,” 1781. His “ Experiments and Obfervations on the Singing of Birds,” and his “ Eflay on the Language of Birds, are among the moft curious and ingenious of his papers. Thefe, and many others, prove that he was not only deeply converfant in books, but was a very attentive and fa- gacious obferver of nature. In private lite he was a man of wrorth and integrity, unambitious, and devoted to ftudy and literary converfation. He refigned his office of juftice of Chefter in 1785, and afterwards lived in retirement in his chambers in King’s-bench- walks, Inner-temple, aflbeiating chiefly with his bro¬ ther benchers, and amufing himfelf with fuperintend- ing the improvements of the gardens. Lie died March '14. 1800, and was buried in the Temple church. BARRINGTONIA.' See Botany Index. BARRISTER, is a counfellor learned in the law, admitted to plead at the bar, and there to take upon him the protection and defence of clients. They are termed jurifconfulti; and in other countries called li- centiati in jure : and anciently barrifters at law were called apprentices of the law7, in Latin apprentic'd juris nobilicres. The time before they ought to be called to the bar, by the ancient orders, was eight years, now reduced to five ; and the exercifes done by them (if they w7ere not called ex gratia) wmre twelve grand moots performed in the inns of Chancery in the time of the grand readings, and 24 petty moots in the term times, before the readers of the refpedive inns : and a barrifter newly called is to attend the fix (or four) next long vacations the exercife of the houfe, viz. in Lent and Summer, and is thereupon for thofe three (or turn) years ftyled a vacation barrjler. Alfo they are called utter barrijlers, i. e. pleaders oujier the bar, to diftinguifh them from benchers, or thofe that have been readers, who are fometimes admitted to -plead within the bar, as the king, queen, or prince’s counfel are. BARRITUS is a wmrd of German original, adopt¬ ed by the Romans to fignify the general fliout ufually given by the foldiers of their armies on their firft en¬ counter after the clajjicum or alarm. This cuftom, however, of fetting up a general (bout was not pecu- liartothe Romans, but prevailed amongft theTrojnnsac- cording to Homer, amongft the Germans, the Gauls, Macedonians, and Perfians. See Classicum. BARROS, John, a celebrated Portuguefe hiftori- an, born at Vifco in 1496. He was educated at the court of King Emanuel, among the princes of the blood, and made a great progrefs in Greek and Latin. The Infant John, to wLom he attached himfelf, and became preceptor, having fucceeded the king his fa¬ ther in l 521, Barros obtained a place in this prince’s hou fell old ; and in 1522, was made governor of St George del Mina, on the coe.ft of Guinea. Three years after, the king having recalled him to court, made him treafurerof the Indies, and this poft infpired him with the thought of WTiting this hiftory, for which purpofe Barrow. BAR f 425 ] BAR purpofe he retired to Pompas, where he died in 1570. - His hiftory of Afia and the Indies is divided into de¬ cades ; the firft of which he publifhed in 1552, the fecond in 1553, and the third in 1563 •, but the fourth decade was not publiihed till the year 1615, when it appeared by order of King Philip III. who had the manufcript purchafed of the heirs of John Bar- ros. Several authors have continued it, fo that we have at prefent 12 decades. He left many other works 5 feme of which have been printed, and others remain in manufcript. BARROW, Isaac, an eminent mathematician and divine of the laft century, was the fon of Mr Thomas Barrow a linen draper in London, where he w'as born in 1630. He w^as at firft placed at the charter-houfe fchool for twro or three years 5 where his behaviour af¬ forded but little hopes of fuccefs in the profeflion of a fcholar, he being fond of fighting, and promoting it among his fchoolfellowTs : but being removed from thence, his difpofition took a happier turn •, and hav¬ ing foon made a great progrefs in learning, he was admitted a penfioner of Peter-houfe in Cambridge. He now applied himfelf with great diligence to the ftudy of all parts of literature, efpecially to that of natural philofophy. He afterwards turned his thoughts to the profeffion of phyfic, and made a confiderable progrefs in anatomy, botany, and chemiftry ; after this he ftudied chronology, aftronomy, and geometry. He then travelled into France and Italy, and in a voyage from Leghorn to Smyrna gave a proof of his bravery j for the ftiip being attacked by an Al¬ gerine pirate, he ftaid upon deck, and with the great- eft intrepidity fought, till the pirate, perceiving the ftout refiftance the {hip made, fheered off and left her (a). At Smyrna he met with a moft kind reception from Mr Bretton the Englifti conful, upon whofe death he afterwards wrote a Latin elegy. From thence he pro¬ ceeded to Conftantinople, where he receive^ the like civilities from Sir Thomas Bendilh the Englifh ambaf- fador, and Sir Thomas Dawes, with whom he after¬ wards preferved an intimate friendftiip. At Conftan¬ tinople he read over the wmrks of St Chryfoftom, once bifhop of that fee, whom he preferred to all the other fathers. When he had been in Turkey fomewhat more than a year, he returned to Venice. From thence he came home in 1659, through Germany and Holland •, and was epifcopally ordained by Bithop Brownrig. In 1660, he was chofen to the Greek profefforfhip at Cambridge. When he entered upon this province, he intended to have read upon the tra- Vol. III. Part II. gedies of Sophocles 5 but he altered his intention, and made choice of Ariftotle’s rhetoric. Thefe ledlures having been lent to a friend who never returned them, are irrecoverably loft. July the 16th 1662, he was eletfted profeffor of geometry in Grelham-college, by the recommendation of Dr Wilkins, mailer of Trinity- college, and afterwmrds bifhop of Chefter. Upon the 20th of May 1663 he was elefted a fellow of the Royal Society, in the firft choice made by the council after their charter. The fame year the executors of Mr Lucas having, according to his appointment, founded a mathematical lefture at Cambridge, they fix¬ ed upon Mr Barrow for the firft profeffor ; and though his tw'o profefforfhips wrere not inconfiftent with each other, he chofe to refign that of Greftiam-college, 'which he did May the 20th 1664. In 1669 he re- figned his mathematical chair to his learned friend Mr Ifaac Newton, being now determined to give up the ftudy of mathematics for that of divinity. Upon quitting his profefforfhip, he was only a fellow' of Trinity-college, till his uncle gave him a fmall fine- cure in Wales, and Dr Seth Ward bifhop of Salif- bury conferred upon him a prebend in his church. In the year 1670 he was created doflor in divinity by- mandate ; and, upon the promotion of Dr Pearfon mafter of Trinity-college to the fee of Chefter, he was appointed to fucceed him by the king’s patent, bear¬ ing date the 13th of February 1672. When the king advanced him to this dignity, he wTas pleafed to fay, “ he had given it to the beft fcholar in England.” His majefty did not fpeak from report, but from his own knowledge : the doftor being then his chaplain, fee ufed often to converfe wuth him, and in his humour¬ ous way, to call him an “ unfair preacher,” becaufe he exhaufted every fubjeft, and left no room for others to come after him. In 1675 he was chofen vice-chan¬ cellor of the univerfity. The doftor’s works are very numerous, and fuch as do honour to the Englilh nation. They are, 1. Euclid’s Elements. 2. Euclid’s Data. 3. Optical Leftures, read in the public fchool of Cam¬ bridge. 4. Thirteen Geometrical Leftures. 5. The W7orks of Archimedes, the four Books of Apollonius’s Conic Sedtions, and Theodofius’s Spherics explained in a newr Method. 6. A Ledlure, in wftuch Archi¬ medes’s Theorems of the Sphere and Cylinder are in- veftigated and briefly demonftrated. 7. Mathematical Leftures, read in the public fchools of the univerfity of Cambridge : the above were all printed in Latin ; and as to his Englifti w'orks, they are printed together in four volumes folio.—“ The name of Dr Barrow (fays the reverend and learned Mr Granger) will ever be il- . 3 luftrious Barren (a) There is another anecdote told of him, which not only ftiow'ed his intrepidity, but an uncommon good- nefs of difpofition, in cireumftances where an ordinary {hare of it would have been probably extinguifhed. He wras once in a gentleman’s hq#& in the country, where the neceffary was at the end of a long garden, and con- fequently at a great diftance from the room wftiere he lodged : as he was going to it before day, for he wras a very early rifer, a fierce maftiff, wrho ufed to be chained up all day, and let loofe at night for the fecurity of the houle, perceiving a ftrange perfon in the garden at that unfeafonable time, fet upon him with great fury. The do