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. XXXIV. For the Year 1726, and Jan. Febr. March, April, May and June 1727. LONDON, Printed for W. and J. Innys, Printers to the Royal Society, at the West End of St. Paul's. 1728. To Martin Folkes, Esq; Vice-President of the Royal Society. Honoured Sir, I shall not, I presume, need any other Apology for prefixing your Name to this Thirty Fourth Volume of Philosophical Transactions, when I declare, that the Motive of my doing so was the same, which induc'd the greatest Man that ever liv'd, to single you out to fill his Chair, and to preside in the Assemblies of the Royal Society, when the frequent Returns of his Indisposition would no longer permit him to attend them with his usual Assiduity. This Motive, Sir, we all know, was your uncommon Love to, and your singular Attainments in those noble and manly Sciences, to which the Glory of Sir Isaac Newton, and the Reputation of the Royal Society is solely and entirely owing. That Great Man was sensible, that something more than knowing the Name, the Shape and obvious Qualities of an Insect, a Pebble, a Plant, or a Shell, was requisite to form a Philosopher, even of the lowest rank, much more to qualify one to sit at the Head of so great and learned a Body. We all of us remember that Saying so frequently in his Mouth, That Natural History might indeed furnish Materials The DEDICATION. vials for Natural Philosophy; but, however, Natural History was not Natural Philosophy; and it was easy for all his Friends to see, with what intent he so often us'd this remarkable Expression. We knew his Love to the Royal Society, and his Fears for it. It was not that he despis'd so useful a Branch of Learning as Natural History; he was too wise to do so: But still he judg'd that this humble Handmaid to Philosophy, tho' she might be well employ'd in amassing Implements and Materials for the Service of her Mistress, yet must very much forget her self, and the Meanness of her Station, if ever she should presume to claim the Throne, and arrogate to her self the Title of the Queen of Sciences. These, Sir, were the Sentiments of that Illustrious Philosopher, and his Authority alone would weigh a great deal with you, if the Solidity of your own Judgment did not convince you of the Truth of them. But I shall not offer here to draw your Character: It is sufficient to say, that Mr. Folkes was Sir Isaac Newton's Friend. However, while I avoid being troublesome to your Modesty, I beg leave to indulge my own Vanity thus far, to endeavour by this publick Application to perpetuate the Memory of that sincere and constant Friendship, which has now so many Years subsisted between you and me, who am, with the highest Esteem and Respect, Sir, Your most Obliged and most Faithful Servant, J. JURIN, R.S., Secr. PHILOSOPHICAL TRANSACTIONS. For the Months of January and February, 1726. The CONTENTS. I. De Salibus Alcalino-fixis, Auctore C. Neuman, Chym. Prof. Reg. Berolin. R. S. S. II. Observations of the Eclipse of the Moon, Octob. 10th. 1725. made at Bristol, by Jeremy Bur- roughs Esq; communicated in a Letter to Mr. Cheselden, Surgeon to St. Thomas's Hospi- tal, F. R. S. III. Sceletum duorum Humanorum petrefactorum pars. Ex Epistola Joh. Jac. Scheuczer, M. D. R S. S. ad Dom. Hans Sloane, Baronettum, S. R. V. Pr. IV. A Contrivance to avoid the Irregularities in a Clock's Motion, occasion'd by the Action of Heat and Cold upon the Rod of the Pendulum. By Mr. George Graham, Watch-Maker, F. R. S. PHILOSOPHICAL TRANSACTIONS, For the Months of March and April, 1726. The CONTENTS. I. De Salibus Alcalino-fixis, Auctore C. Newman, Chym. Prof. Reg. Berolin. R. S. S. Pars reliqua. II. Observations made at Southwick, in the County of Northampton, Long. West from London, 00 deg. 30 min. Lat. 51 deg. 58 min. nearly, with a thirteen foot Telescope, whose Aperture was 2.4 Inches, and Charge 2.5 Inches, all by apparent Time. By the ingenious George Lynn, Esq; III. An Extraordinary high Tide in the River Thames, observ'd by Capt. Thomas Jones. IV. Observations upon the Tides in the River Thames, by Mr. Henry de Saumarez. PHILOSOPHICAL TRANSACTIONS For the Months of May, June, and July, 1726. The CONTENTS. I. The Longitude of Lisbon, and the Fort of New York, from Wansted and London, determined by Eclipses of the First Satellite of Jupiter. By the Reverend Mr. James Bradley, M. A. Astron. Prof. Savil. R. S. S. II. Observationes Astronomicæ habita Ulyssipone, Anno 1725, & sub init. 1726, à Rev. P. Johanne Baptista Carbone, Soc. Jes. Communicante Isaaco Sequeyra Samuda, M. D. R. S. S. Coll. Med. Lond. Lic. III. Singularia quædam in Cadavere calculoso dissecto reperta, ab Abrahamo Vater, M. D. Pr. Anat. Wittemb. R. S. S. IV. A Letter from Mr. Colin Mac Laurin, Professor of Mathematicks at Edinburgh, and F.R.S. to Martin Folkes, Esq; concerning Equations with impossible Roots. The CONTENTS. V. Observations upon the Dissection of an Ostrich, communicated in a Letter to the Publisher, by the Ingenious Mr. George Warren, Surgeon in Cambridge. VI. An Account of a Person kill'd by Lightning at Worcester, communicated in a Letter to the Publisher, by R. Beard, M.D. R.S.S. VII. An Account of the Strata met with in digging for Marle, and of Horns found under Ground in Ireland; in a Letter from Mr. James Kelly to the Right Honourable Edward Southwell, Esq; PHILOSOPHICAL TRANSACTIONS For the Months of August, September and October, 1726. 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 1725, pursuant to the Direction of Sir Hans Sloane, Baronet, Pr. Coll. Med. S. R. V. Pr. By Mr. Isaac Rand, Apothecary, F. R. S. II. An Account of an Aurora Borealis seen in Ireland in September 1725; in a Letter from Arthur Dobbs, Esq; to his Brother the Reverend Mr. Richard Dobbs, Fellow of Trinity-College, Dublin. III. An Account of the Aurora Borealis that appear'd Oct. 8. 1726. In a Letter to the Publisher from the Reverend Dr. Langwith, Rector of Petworth in Sussex. IV. The same Appearance describ'd in a Letter to the Publisher, by Dr. Huxham, Physician at Plymouth. V. A Letter from Dr. Hallet, Physician at Exeter, to Dr. Henry Pemberton, F. R. S. on the same Subject. VI. The same Appearance observ'd by John Hadley, Esq; F. R. S. VII. De eodem Phænomeno Genevæ viso, Epistola Viri Clarissimi Domini Johannis Ludovici Calandrini, Math. Prof. Ordinar. Genevæ, ad Jac. Jurin, R. S. Secr. VIII. An Account of a præternatural Bony Substance found in the Cavity of the Thorax, communicated in a Letter to Dr. Rutty, by Mr. William Giffard, Surgeon. IX. Observatio de Succinea Gleba, Plantæ cujusdam folio imprægnata, rarissima. Auctore Dno. Johanne Philippo Breynio, M. D. R. S. S. X. Observatio Defectus Solis habita Patavii VII: Cal. Octob. 1726. a Viro Cl. Domino Johanne Poleno, Astr. Prof. P. S. S. XI. Observatio Defectus Lunæ habita (tubo optico optimæ notæ, longo pedes Parisienses septem) Patavii. VII. Id. Octob. 1726. ab eodem Viro Clarissimo. XII. Two newly discover'd Arteries in Women, going to the Ovaria. By Mr. Ranby, Surgeon to his Majesty's Household, F. R. S. PHILOSOPHICAL TRANSACTIONS For the Months of November, and December, 1726. The CONTENTS. I. A short Account of Negativo-affirmative Arithmetick, by Mr. John Colson, F.R.S. II. Eclipse Lunaæ observata Romæ, ad radices Collis Quirinalis, nocte sequente diem 31. Octobris, 1724; per clarissimum Virum Franciscum Blanchinum. Ex Epistola Rev. & Cl. Viri, Johannis Baptistæ Carbone, S. Jes. ad Isaacum Sequeyra Samuda, M.D. R.S.S. Coll. Med. Lond. Lic. III. Observationes aliquot Circum-Jovialium habitæ eodem Anno 1724; per eundem Cl. Blanchinum. Ex eadem Epistola. IV. Observatio Lunaris Eclipseos Albani habita post Occasum Solis diei Dominicae 21 Octobris, S.N. 1725. Ab eodem. Ex eadem Epistola. V. Conspectus Maculæ Platonis in Luna, caelo clarissimo, nocte sequente diem 16 Augusti 1725, hora prima post Occasum Solis, Romæ in Monte Palatino, per tubum opticum The CONTENTS. opticum Josephi Campani, palmorum 150 Romanorum spettante eodem Viro Cl. Ex eadem Epistola. VI. A Remark upon the new Opinion relating to the Forces of moving Bodies, in the case of the Collision of Non-Elastic Bodies. By Mr. John Eames, F.R.S. VII. Remarks upon a supposed Demonstration, that the Moving Forces of the same Body are not as the Velocities, but as the Squares of the Velocities. By the same. VIII. Brevis Commentatio de Cobalto, Authore Viro Clarissimo Joh. Henr. Linckio, Lipsiensi Acad. Cæsar. Leopold. Carolin. Nat. Curios. & Soc. Reg. Anglic. Sodale. PHILOSOPHICAL TRANSACTIONS. For the Months of January, February, and March. 1727. The CONTENTS. I. Remarks upon some Dissertations lately publish'd at Paris, by the Rev. P. Souciet, against Sir Isaac Newton's Chronology. By Dr. Edmund Halley, Astronomer Royal, F. R. S. II. An Account of a large Stone voided through the Urinary Passage, by a Woman, Communicated by Dr. Richard Beard, F. R. S. Physician at Worcester. III. Observations upon the Comet, that appear'd in October 1723, made at Bombay; and upon an Eclipse of the Moon, Oct. 21, 1724, at Gomroon in Persia. By Mr. William Saunderson. Communicated by Dr. Halley, Astron. Reg. R. S. S. IV. A Letter from the Reverend Mr. Edmond Barrell, Rector of Sutton in Kent, to Sir Hans Sloane, Baronet, President of the Royal Society, and of the College of Physicians, concerning the Propagation of Mistletoe. The CONTENTS. V. An Account of a Pair of very extraordinary large Horns found in Wapping some Years since, with a probable Account, whence they came, and to what Animal they belonged. By Sir Hans Sloane, Baronet, President of the Royal Society, and of the College of Physicians. VI. A Demonstration of the 11th Proposition of Sir Isaac Newton's Treatise of Quadratures. By Mr. Benjamin Robins. VII. Muris Alpini Anatome. A Johanne Jacobo Scheuczero, M.D. R.S.S. PHILOSOPHICAL TRANSACTIONS. For the Months of April, May, and June, 1727. The CONTENTS. I. Observations on the Lumen Boreale, or Streaming on Oct. 8, 1726, by the Reverend Mr. W. Derham, F. R. S. II. The same observ'd at Southwick in Northamptonshire. By George Lynn, Esq; III. Registrum Observationum de Lumine Boreali per quadriennium, Ex Epistolâ Viri Cl. Gulielmi Rastrick, ad Martinum Folkes, Arm. R. S. V. Pr. Lennæ Regis, Martii 20, 1724. IV. An Account of four Mock-Suns, seen at Kensington, March 1st 1726-7. By Mr. George Whiston. V. Crystallorum quarundam rarissimarum nuper detectarum descriptio, ex literis Viri Cl. Johannis Jacobi Scheuczer, R. S. S. ad Dominum Hans Sloane, Bar. Reg. Soc. & Coll. Med. Lond. Praesidem. VI. An Account of a Stone taken out of a Horse, at Boston in New England, in the Year 1724. By the Honourable Paul Dudley, Esq; F. R. S. VII. An Account of a Polypus cough'd up from the Windpipe; in a Letter from the Ingenious Dr. Sanber Physician at Salisbury, to Dr. Jurin, Secr. R. S. VIII. An Account of a Book entitul'd Vegetable Staticks: Or, an Account of some Statical Experiments on the Sap in Vegetables; being an Essay towards a natural History of Vegetation. Also, a Specimen of an Attempt to Analyse the Air, by a great Variety of Chymico-Statical Experiments; which were read at several Meetings before the Royal Society, &c. By Stephen Hales, B. D. F. R. S. Rector of Farringdon, Hampshire, and Minister of Teddington, Middlesex. The Account by the Rev. John Theoph. Desaguliers, L L. D. R. S. S.