Front Matter

The only official reprint authorized by The Royal Society of London PHILOSOPHICAL TRANSACTIONS. GIVING SOME ACCOUNT OF THE Present Undertakings, Studies, and Labours, OF THE INGENIOUS, IN MANY Considerable Parts of the WORLD. VOL. XL. For the Years 1737, 1738. With a Supplement, being the Croonean Lectures on Muscular Motion, for the Year 1738. LONDON: Printed for T. Woodward, at the Half-Moon, between the Temple-Gates in Fleetstreet; and C. Davis in Paternoster-row; PRINTERS to the ROYAL SOCIETY. M.DCC.XLI. TO THE HONOURABLE John Winthrop, Esq; Fellow of the Royal Society, &c. &c. SIR, PERSONAL Friendships and Favours are become the trite Topics of Dedications and public Addresses, as if it concerned the Public to have upon Record the mutual Regard, private Persons may have to each other: Therefore without expatiating here, so far as Gratitude might lead me, on the many Favours you have honour'd me with, I shall confine myself to the Relation Your Illustrious Grandfather had, and Yourself have, to the Royal Society. No sooner were the Sciences revived at the Beginning of the last Century, and that Natural Knowledge began to be thought a Study DEDICATION. Study worthy a real Philosopher, but the ingenious JOHNNINTHRÖP, Esq; your Grandfather, distinguish'd himself in the highest Rank of learned Men, by the early Acquaintance he contracted with the most Eminent not only at Home, but in his Travels all over Europe, by the strict Correspondence he afterwards cultivated with them *, and by several learned Pieces he composed in Natural Philosophy; which indeed his innate Modesty would not suffer him to publish immediately, * As might appear from the great Treasure of curious Letters on various learned Subjects fill in your Hands, E. gr. from Earl of Anglesey. Dr. Everard, Ox. Dr. Jeffa. Earl of Arundel. Pet. Jo. Faber, M.D. Joh. Keppler. Elias Ashmole, Esq; Montpelii. J. S. Kuffeler, M.D. Rob. Boyle, Esq. Gal. Galileo. Dr. Lovell, Ox. Tycho Brahe Otto- J. Rud. Glauber. Earl of Manchester, nides. Dr. Goddard. ye Lord Chamberlain. Lord Brereton. PRINCEPS Gothar. Lord Brooke. Dr. Grew. Lord Brounker. Mr. Hartlib. Dr. Browne. Dr. Haversfeld. Jo. Camden. J. Bapt. van Helmont, cui fuit unus Dr. Charlton. welperi amicus ille Dom. Chartes Jesuita Ludg. Bat. Ludg. Bat. J. Fred. Helvetius. Lord Chan. Clarendon Lord Herbert. Dan. Colwall. Hans Albrecht Dominus Herberstein Ds. Comenius. & Praefectus Palatine. King Charles II. Joh. Hevelius Cos. O. Cromwell. Gedan. Arthur Dee, M.D. Sir Jo. Heydon. Jo. Dee, Jun. FRED. Princeps Holstiae & D. Siefvic. Dr. Dekinion. Robert Hooke. Sir K. minn Digby. Ch. Howard, afterwards Duke of Norfolk. Corn. Debelius. Conrad. Roves Dominus Rosenftein Ernestus Colonie Margrav. in Croatia. Episcopus & Elect. Many of which you have given me the Pleasure of perusing; besides a great Number which it would take up too much Room here to recite. and DEDICATION. and when prevailed on by Friends to impart some† of them to the Public, he concealed his Name; not being solicitous of the Reputation they might reflect on their Author: The same Principle in you still induces you not to withdraw the Veil; it having always been a Maxim with both him and you, *Prodeesse quam conspici.* The Cloud that was gathering over his native Country, warned him and his Father to seek a quiet Retirement in the new World, *Sedes ubi fata quietas Ostendunt; illic fas Regna resurgere nova.* Where, after having sold a very plentiful Estate in Old England, they conducted a large Body of People, and at the Expence of their whole Patrimony, first* establish'd the Colony of Massachusetts-Bay, and afterwards other Colonies in New-England, so that they were in Reality the Founders of that now most flourishing and most potent of all the --- † Many more unpublished remain in MS. in your Hands. * See the Magnalia Christi Americana. DEDICATION. English Settlements, NEWENGLAND, of which his Father the Honourable John Winthrop, Esq; the Elder, was the first Governor. The Fatigues of this great Undertaking took up too much of his Time, to allow him all that Leisure that was wish'd for by his learned Friends in Europe, for his publishing many curious Pieces which they had Reason to expect from him. His distant Abode from London, and his not putting his Name to his Writings, made him not so universally known as the Boyle's, the Wilkins's, or the Oldenburg's of his Days, nor his Name handed down to us with such general Applause. In Concert with these and other learned Friends, (as he often revisited England) he was one of those, who first form'd the Plan of the Royal Society; and had not the Civil Wars happily ended as they did, Mr. Boyle* and Dr. Wilkins, with several other learned Men, would have left England, and, out of Esteem for the most excel- * As may appear in Letters from Mr. Boyle, Dr. Wilkins, Sir K. Digby, &c. to Mr. Winthrop. DEDICATION. lent and valuable Governor, JOHN WIN- THROP the younger, would have retir'd to his new-born Colony, and there have establish'd that Society for promoting Natural Know- ledge*, which these Gentlemen had formed, as it were, in Embryo among themselves; but which afterwards receiving the Protection of King CHARLES II. obtain'd the Style of ROYAL, and hath since done so much Honour to the British Nations, as to be imitated by the several European Princes, who desir'd to be esteem'd the Patrons of Learning. WHEN the Royal Society was thus founded, it was his constant Care to shew a peculiar Regard to promote the Design of its Institu- tion, by sending over many Specimens of the curious natural Productions of those Countries, and by communicating in Writ- ing his Remarks upon them; some of which grace the earliest of our Transactions: And by a Letter from Mr. Oldenburg, written by Order of the Royal Society, Mr. Winthrop * Which not taking place, his Father first founded the College at Cambridge in New-England, since known by the Name of Harvard-College. DEDICATION. was in a particular manner invited to take upon him the Charge of being the chief Correspondent of the Royal Society in the West, as Sir Philiberto Vernatti was in the East-Indies*. You, Sir, have imitated the Example of your worthy Ancestor: Your Regard to the Royal Society shew'd itself from your Youth; you having sent to England many rare Curiosities for the Museum of the Royal Society, which, although by the Disingenuity of the Pilot they miss'd their Port, and were not laid up in the intended Repository, are some of them to be seen in a recent Museum now at Cambridge. When the Injustice and Ingratitude of a designing Party in Power among that very People, whereof the Winthropes have always been in the most strict Sense the Fathers, the Patres Patriæ, had most cruelly driven you from your Family * In a Letter from Mr. Oldenburg, Aug. 3, 1664. DEDICATION. and Native Soil, to seek Justice and Security in your natural Rights from the Hands of our most Gracious Sovereign; amidst the Vexation of the greatest Abuses, and the Hurries of the most sudden Departure, you were not unmindful of the Royal Society; for soon after your being chosen a Fellow, you increas'd the Riches of their Repository with above Six hundred curious Specimens, chiefly in the Mineral Kingdom, accompanied with a List containing an accurate Account of each Particular; thereby shewing your great Skill in natural Philosophy, and at the same time intimating to England the vast Riches which lie hidden in the Lap of her principal Daughter. Since Mr. Colwall, the Founder of the Museum of the Royal Society, you have been the Benefactor who has given the most numerous Collection; and it is to be hoped your generous Example will be followed by some of the present Members, by which means our Repository may soon become one of the most conspicuous in Europe. The extraordinary Knowledge, you have in the deep Mysteries of the most secret Hermetic DEDICATION. metic Science, will always make you esteemed and courted by learned and good Men; but I forbear to say any more, lest the Trouble I have given you by this long Address should be a Trespass upon your Patience; in which Case I know your Goodness will forgive me; and I hope you will be persuaded, that I am upon all Occasions, with the greatest Sincerity, SIR, Dartmouth-street, WESTMINSTER, August 15. 1741. Your most affectionate Friend, and obliged humble Servant, CROMWELL MORTIMER, M.D. Secretary to the Royal Society, and Fellow of the Royal College of Physicians, LONDON. PHILOSOPHICAL TRANSACTIONS For the Months of January, February, March, April, May and June, 1737. The CONTENTS. I. A Catalogue of the Fifty Plants, from Chelsea-Garden, presented to the Royal Society by the Company of Apothecaries, for the Year 1735. pursuant to the Direction of Sir Hans Sloane, Bart. Med. Reg. & Soc. Reg. Prae. by Isaac Rand, Apothecary, F.R.S. Hort. Chel. Prae. ac Praecl. Botan. II. The Case of a Lad bitten by a mad Dog, communicated in a Letter from Mr. Edward Nourse, F.R.S. and Surgeon to St. Bartholomew's Hospital, to Cromwell Mortimer, M.D. Secr. R.S. III. An Explanation of the Runic Characters of Helsingland, by Mr. Andrew Celsius, R.S. Suec. Secr. F.R.S. and Professor of Astronomy at Upsal. IV. A Collection of the Observations made on the Eclipse of the Moon, on March 15, 1735-6. which were communicated to the Royal Society. V. Investigationes aliquot, ex quibus probetur Terræ figuram secundum Leges attractionis in ratione inversa quadrati distantiarum maximè ad Ellipsin accedere debere, per Dn. Alexi Clairaut, Reg. Societ. Lond. & Reg. Scient. Acad. Parif. Soc. VI. Extract of a Letter from Stephen Williams, M.B. F.R.S. concerning the Viper-catchers, (mentioned in No 443. of these Transactions) and the Efficacy of Oil of Olives in curing the Bite of Vipers. The CONTENTS. VII. A Proposal for the Measurement of the Earth in Russia, read at a Meeting of the Academy of Sciences at St. Peters- bourg, Jan. 21, 1737, by M. Jos. Nic. de L’Isle, first Prof. of Astron. and F. R. S. Translated from the French printed at St. Petersbourg, 1737. 4to. By T. S. M. D. F. R. S. VIII. Extract of a Letter from Monsr. de L’Isle to Mr. Net- tleton, containing the actual Mensuration of the Basis pro- posed p. 42. Translated from the French by T. S. M. D. F. R. S. IX. A Letter from the Rev’d Mr. Timothy Neve, Secretary of the Gentlemens Society at Peterborough, to C. Morti- mer, Secr. R. S. containing his Observations of two Par- helia, or Mock-Suns, seen Dec. 30, 1735. and of an Au- orra Borealis, Dec. 11, 1735. X. An Observation of two Parhelia, or Mock-Suns, seen at Wittemberg in Saxony, on Dec. 31, 1735. O. S. Jan. 11, 1736. N. S. by John-Frid. Weidler, F. R. S. &c. Translated from the Latin by T. S. M. D. F. R. S. XI. An Observation of three Mock-Suns, seen in London, Friday, Sept. 17, 1736. by Martin Folkes, Esq; V. Pr. R. S. XII. De Ruptura Intestini Ilei ex contusione externa sine vul- nere externè inflitto ex Literis à Christiano Wolfio, Prof. Mathem. Marpurg. Reg. Soc. Lond. & Acad. Reg. Scient. Paris. Socio ad Gulielmum Rutty, M. D. Soc. Reg. Lond. olim Secret. conscriptis excerpta Observatio. XIII. An Account of some new Statical Experiments, by J.T. Desaguliers, LL. M. F. R. S. XIV. The Apparent Times of the Immersions and Emer- sions of Jupiter’s Satellites, for the Year 1739, computed to the Meridian of the Royal Observatory at Greenwich, by James Hodgson, F. R. S. and Master of the Royal Ma- thematical School in Christ’s Hospital, London. XV. The Apparent Times of such of the Immersions and Emerisions of Jupiter’s Satellites, as are visible at London, in the Year 1739. By James Hodgson, F. R. S. PHILOSOPHICAL TRANSACTIONS For the Months of July, August, September, October November, and December, 1737. The CONTENTS. I. An Account of the Peruvian or Jesuits Bark, by Mr. John Gray, F. R. S. now at Cartagena in the Spanish West-Indies; extracted from some Papers given him by Mr. William Arrot, a Scotch Surgeon, who had gather'd it at the Place where it grows in Peru. Communicated by Mr. Phil. Miller, F. R. S. &c. II. An Account by Mr. John Eames, F. R. S. of a Book entituled, A Mathematical Treatise, containing a System of Conic-Sections, with the Doctrine of Fluxions and Fluents, applied to various Subjects. By Mr. John Muller. III. An Observation of the Moon's Transit by Aldebaran, April 3, 1736. made at London by John Bevis, M. D. IV. A Collection of the Observations of the Lunar The CONTENTS. Lunar Eclipse, Sept. 8, 1736. which were sent to the Royal Society. IV. Eclipsis Solaris observata Londini, Sept. 23. 1736. à J. Bevis, M.D. V. Observations of the Occultation of Mars by the Moon, Oct. 7. 1736. communicated to the Royal Society. VI. Observations of the Transit of Mercury over the Sun, Oct. 31. 1736. communicated to the Royal Society. VII. A Collection of Observations communicated to the Royal Society, relating to the Comet that appear'd in the Months of January, February, and March 1736-7. VIII. A Letter from John Phil. Breyne, M.D. F.R.S. to Sir Hans Sloane, Bart. Presf. R.S. with Observations, and a Description of some Mammoth's Bones dug up in Siberia, proving them to have belonged to Elephants. IX. Extract of a Letter from Andrew Cantwell, M.D. Monspel. to Dr. Stack, dated at Montpellier, June 29, 1732. N.S. Containing an Acconnt of a large Glandular Tumor, in the Pelvis; and of the pernicious Effects of crude Mercury given inwardly to the Patient. PHILOSOPHICAL TRANSACTIONS For the Months of January, February, March, April and May, 1738. The CONTENTS. I. A Catalogue of the Fifty Plants from Chelsea-Garden, presented to the Royal Society by the Company of Apothecaries, for the Year 1736. pursuant to the Direction of Sir Hans Sloane, Bart. Med. Reg. & Soc. Reg. Praef. by Isaac Rand, Apothecary, F. R. S. Hort. Chel. Praef. ac Praelec. Botan. II. Part of a Letter from Dr. Steigerthahl, F. R. S. to Sir Hans Sloane, Bart. Pres. R. S. giving an Account of a Narhual or Unicorn Fish, taken in the River Oft, in the Duchy of Bremen. III. A Description of the same Narhual, communicated by J. H. Hampe, M.D. F. R. S. IV. Insectum Aquaticum, antea non descriptum, Scolopendra scutata dicendum, cuius Iconem & Descriptionem ad Illustissimum Dom. The CONTENTS. Dom. Hans Sloane, R.S. Praef. mihi Ds. Jacobus Theodor. Klein, Reipubl. Gedan. & Secret. & R.S. Lond. S. V. A Letter from the Revd Mr. Littleton Brown, F.R.S. to C. Mortimer, M.D. R.S. Secr. concerning the same sort of Insect found in Kent; with an Addition by the Publisher. VI. An Account and Abstract of the Meteorological Diaries communicated to the Royal Society, for the Years 1729 and 1730. By Geo. Hadley, Esq; F.R.S. VII. A Collection of the Observations of the Solar Eclipse, Feb. 18. 1736-7. sent to the Royal Society. VIII. A Letter from the Revd Ebenezer Latham, M.D. and V.D. M. to C. Mortimer, M.D. Secr. R.S. containing a Proposal to make the Poles of a Globe of the Heavens move in a Circle round the Poles of the Ecliptic. IX. A Contrivance to make the Poles of the Diurnal Motion in a Celestial Globe pass round the Poles of the Ecliptic; invented by John Senex, F.R.S. X. The Solution of Kepler's Problem, by J. Machin, Astr. Prof. Gresh. and Secr. R.S. PHILOSOPHICAL TRANSACTIONS For the Months of June and July, 1738. The CONTENTS. I. A Description of a new Invention of Bellows, called Water-Bellows, by Martin Triewald, F.R.S. Captain of Mechanics, and Military Architect to his Swedish Majesty; communicated to the Royal Society by Sir Hans Sloane, Bart. Presf. R.S. &c. II. Viri celeberrimi Johannis Marchionis Poleni, R.S. Lond. S. ad Virum Doctissimum Jacobum Jurinum, M.D. R. S. S. Epistola, qua continetur Summarium Observationum Meteorologicarum per sexennium Patavii habitarum. Ann. 1731—1736. III. The Imperfections of the common Barometers, and the Improvement made in them, by Mr. Cha. Orme of Ashby-de-la-Zouche in Leicestershire, where they are perfected and rectified; with some Observations, Remarks and Rules for their Use, by Hen. Beighton, F. R. S. IV. Re- The CONTENTS. IV. Relatio de Caverna vaporifera Sulphurea in Lapicidina Pyrmontana, qua similis est Foveæ Neapolitanæ Grotta di Cane dictæ, à Dno Misson, & aliis descriptæ, cum Regali Societate communicata à Johanne Philippo Seip, M. D. Confl. Aulic. & Archiatro Sereniss. Principis à Waldeck, necnon R. S. Lond. Socio. V. A Letter from John Fuller, Esq; Jun. F. R. S. to Sir Hans Sloane, Bart. Pres. R. S. &c. concerning the Effects of Dampier’s Powder, in curing the Bite of a Mad-Dog. VI. Another Case of a Person bit by a Mad-Dog, drawn up by David Hartley, M. A. and Mr. Fr. Sandys, communicated to the Royal Society by Francis Wollaston, Esq; F. R. S. PHILOSOPHICAL TRANSACTIONS For the Months of August and September, 1738. The CONTENTS. I. An Inquiry concerning the Figure of such Planets as revolve about an Axis, supposing the Density continually to vary, from the Centre towards the Surface; by Mr. Alexis Clairaut, F. R. S. and Member of the Royal Academy of Sciences at Paris. Translated from the French by the Rev. John Colson, Lucas Prof. Math. Cantab. and F. R. S. II. New Experiments upon Ice; taken from Abbé Nolet, F. R. S. at Paris, and communicated by J. T. Desaguliers, LL.D. F. R. S. III. An Observation of the Magnetic Needle being so affected by great Cold, that it would not traverse; by Capt. Christopher Middleton, F. R. S. IV. Extract of a Letter from Dr. Andrew Cantwell of Montpelier, to Dr. Thomas Stack, dated June 23, 1732. concerning an uncommon Palsey of the Eye-lids. V. An Account of the Man whose Arm with the Shoulder-blade was torn off by a Mill, the 15th of August 1737. by Mr. John Belchier, F. R. S. Surgeon to Guy's Hospital. VI. An VI. An Account of the Wound, which the late Lord Carpenter received at Brihuega; whereby a Bullet remained near his Gullet for a Year wanting a few Days; communicated to the Royal Society by his Son the Right Honourable George Lord Carpenter, F. R. S. &c. VII. Of an Obstruction of the Biliary Ducts, and an Impostumation of the Gall-Bladder, discharging upwards of 18 Quarts of bilious Matter in 25 Days, without any apparent Defect in the Animal Functions. By Claudius Amyand, Esq; Serjeant Surgeon to His Majesty, and F. R. S. VIII. Some Observations on the preceeding Case, by Alexander Stuart, M.D. F. R. S. &c. IX. The apparent Times of the Immersions and Emersions of the four Satellites of Jupiter, for the Year 1740. computed to the Meridian of the Royal Observatory at Greenwich, by James Hodgson, F. R. S. Master of the Royal Mathematical School in Christ’s Hospital, London. X. The apparent Times of such of the Immersions and Emersions of Jupiter’s Satellites, as are visible at London, in the Year 1740. By the Same. XI. A Continuation of an Account of An Essay towards a Natural History of Carolina, and the Bahama Islands; by Mark Catesby, F. R. S. with some Extracts out of the ninth Set, by Dr. Mortimer, Secr. R. S. PHILOSOPHICAL TRANSACTIONS For the Months of October and November, 1738. The CONTENTS. I. Matthiae Belii Pannonii, Reg. Soc. Lond. S. & Reg. Soc. Scient. Berolin. Colleg, &c. Observatio Historico-Physica, de Aquis Neofolienium aeratis, vulgo Cement-Waszer dietis, Ferrum Ære permutantibus, in Epistolâ ad Illust. Dr. Hans Sloane, Bart. R. S. Pr. scriptâ communicata. II. Of a Bubonocele or Rupture in the Groin, and the Operation made upon it; by Claud. Amyand, Esq; Serjeant Surgeon to His MAJESTY, and F. R. S. III. An Account of a Pin taken out of the Bladder of a Child, by Mr. William Gregory, Surgeon; communicated in a Letter to Sir Hans Sloane, Bart. Pr. R. S. IV. A Letter from the Marquis de Caumont to Sir Hans Sloane, Bart. President of the Royal Society, containing the Description of a very extraordinary Stone or Calculus (see Tab. fig. 1.) taken out of the Bladder of a Man after Death; translated from the French by T.S. M.D. F.R.S. V. An Account of the Case above-mention'd, translated from the French by Mr. P. H. Zollman, F. R. S. VI. Sir Hans Sloane, Bart. Pr. R. S. his Answer to the Marquis de Caumont's Letter, concerning this Stone; translated from the Latin by Tho. Stack, M. D. F. R. S. VII. An Account of some Oil of Sassafras crystallized, by Mr. John Maud, Chemist, F. R. S. VIII. An The CONTENTS. VIII. An Observation of an extraordinary Damp in a Well in the Isle of Wight; communicated in a Letter from Mr. Benj. Cooke, F. R. S. to Mr. Peter Collinson, F. R. S. IX. An Extract from the Journal Books of the Royal Society, concerning Magnets having more Poles than two; by John Eames, F. R. S. with some Observations by Dr. Desaguliers on the same Subject. X. An Account of some Magnetical Experiments made before the Royal Society, on Thursday the 24th Day of June 1736. by the Revd. J. T. Desaguliers, LL. D. F. R. S. XI. The Description of an antique Metal Stamp, in the Collection of his Grace Charles Duke of Richmond, Lenox and Aubigny, F. R. S. &c. being one of the Instances, how near the Romans had arrived to the Art of Printing; with some Remarks by C. Mortimer, M. D. Fellow of the College of Physicians, and Secr. R. S. Lond. See Tab. fig. 3. XII. Mercurius a Venere occultatus Maii 17. 1737. in Observatorio Regio Grenovici, ab J. Bevis, M.D. observatus. XIII. The Use of a new Azimuth Compass for finding the Variation of the Compass or Magnetic Needle at Sea, with greater Ease and Exactness than by any ever yet contriv'd for that Purpose; by Capt. Christopher Middleton, F. R. S. XIV. An Account of a Book intituled, Notitia Hungariae novae Historico-Geographica, &c. Auctore Matth. Belio. By the Revd. Zachary Pearce, D. D. F. R. S. &c. XV. A short Account of Mr. Kersseboom's Essay [intituled, Vanhandeling tot een Proeve om te weeten de probable Menigte des Volks in de Provintie van Hollandt en Westfrieslandt. Hage 1738. in 4to. door W. Kersseboom] upon the Number of People in Holland and West-Friesland, as also in Harlem, Gouda and the Hague; drawn from the Bills of Births, Burials, or Marriages, in those Places. By J. Eames, F. R. S. XVI. An Answer to that Part of Mr. W. Kersseboom's Essay, which treats of the Number of the Inhabitants of London; by Wm. Maitland, F. R. S. I. Matthiae PHILOSOPHICAL TRANSACTIONS. For the Month of December, 1738. The CONTENTS. I. A Description of a Water-Level to be fix'd to Davis's Quadrant, whereby an Observation may be taken at Sea, in thick and hazy Weather, without seeing the Horizon; by Charles Leigh, Gent. II. The Description and Use of an Apparatus added as an Improvement to Davis's Quadrant, consisting of a Mercurial Level, for taking the Co-altitude of Sun or Star at Sea, without the usual Assistance of the sensible Horizon, which frequently is obscured. By the Same. III. A Letter from Mr. John Ferguson, Surgeon, to William Cheselden, Esq.; Surgeon to Chelsea College, F. R. S. &c. containing an Account of the Expiration of part of the Spleen of a Man. IV. A Letter from Benjamin Cooke, F. R. S. to Peter Collinson, F. R. S. concerning a Ball of Sulphur supposed to be generated in the Air. V. An Account of a Book intituled, Observationes de Aere & Morbis Epidemicis, ab Anno 1728, ad finem Anni 1737, Plymuthi factæ. His accedit Opusculum de Morbo Colico Damnoniensii. Anctore Joanne Huxham, M. D. R. S. S. Drawn up by Tho. Stack, M. D. F. R. S. The CONTENTS. VI. An Abstract by C. Mortimer, M.D. Secr. R.S. of an Inaugural Dissertation published at Wittemberg 1736. by Dr. Abraham Vater, F.R.S. concerning the Cure of the Bite of a Viper, cured by Salad-oil. VII. Abstracts of two Letters from M. Dufay, F.R.S. &c. to Dr. Mortimer, Secr. R.S. concerning the Efficacy of Oil of Olives in curing the Bite of Vipers. VIII. Extract of a Letter concerning the Poison of Henbane-Roots, from Dr. Patouillat, Physician at Toucy in France, to M. Geoffroy, F.R.S. and Member of the Royal Academy of Sciences at Paris, communicated to the Royal Society, London, by Sir Hans Sloane, Med. Reg. and Pres. R.S. Translated from the French by T.S. M.D. F.R.S. IX. A Letter from the Revd. Mr. Tho. Steward, V.D.M. to Dr. Mortimer, Secr. R.S. concerning the Virtues of the Star of the Earth, Coronopus, or Bucks-horn Plantain, in the Cure of the Bite of the Mad-Dog. X. De Reductione Radicalium ad simpliciores terminos, seu de extrahenda radice quacunque data ex Binomio $a + \sqrt{b}$, vel $a + \sqrt{-b}$. Epistola Abrahami de Moivre, R.S.S. ad Gulielmum Jones, Armigerum, R.S.S. Printed for T. Woodward, at the Half-Moon, between the Two Temple-Gates in Fleetstreet; and C. Davis, the Corner of Pater noster-row, next Warwick-lane; Printers to the Royal Society. M.DCC.XLI. At a Meeting of the Council of the ROYAL SOCIETY, Nov. 12. 1739. THese Lectures on Muscular Motion, by Alexander Stuart, M.D. &c. having been, according to the Will of the Lady Sadleir, communicated before-hand to me, and approved, and afterwards read at several Meetings of this Society, for which he received their Thanks: I do direct the same to be printed. Hans Sloane, P.R.S. To the Honourable Sir Hans Sloane, Bart. President, and to the Council and Fellows of the Royal Society Of London, for Promoting Natural Knowledge, These three first Lectures on Muscular Motion Are humbly Dedicated. By Their most obedient humble Servant, Alexander Stuart.