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PRESENTS RECEIVED BY THE ROYAL SOCIETY, From November 1818 to July 1819. WITH THE NAMES OF THE DONORS. 1818. Nov. 5. Effemeridi Astronomiche di Milano per l'Anni 1816-1817-1818, con Appendice. Flora Batava, No. 23 to 51, Amsterdam. Traité complet de Mécanique appliquée aux Arts.—Composition des Machines, par J. A. Borgnis, Paris, 1818. The Transactions of the Royal Irish Academy, Vol. XIII. Dublin, 1818. Transactions of the Horticultural Society of London, Vol. II. Part 5. London, 1817. Observations Astronomiques faites à l'Observatoire de l'Academie Royale des Sciences, par M. Plana. Kongl. Vetenskaps Academiens Handlingar för År 1817. Stockholm, 1817. An Elementary Treatise on Astronomy. Vol II. containing Physical Astronomy, by Robert Woodhouse. Cambridge, 1818. Lettere concernente l'Anfeatro di Verona. Verona, 1817. Cappella dell' Famiglia Pellegrini esistente nella Chiesa di San Bernardino di Verona, 1816. fol. Ittiolitologia Veronese del Museo Bozziano. Verona, 1816. The Monthly Review for June, July, August, September, and October, and Appendix to Vol. 86. Annals of Philosophy, No. 67 to 71. The Philosophical Magazine, No. 242 to 246. DONORS. SS. Francesco Carlini and Enrico Brambelli. His Majesty the King of the Netherlands. M. J. A. Borgnis. The Royal Irish Academy. The Horticultural Society. Mr. Plana. The Royal Academy of Sciences of Sweden. Robert Woodhouse, Esq. Count Bartolomeo Guigliari. Mr. G. E. Griffiths. Dr. Thomas Thomson. Mr. Alexander Tilloch. 1818. Nov. 5. The European Magazine from June to October. Medico-Chirurgical Transactions. Vol. IX. Part I. London, 1818. 8° Deux Traités de Physique Mécanique, publiées par Pierre Prevost. Genève et Paris, 1818. 8° De la Mineralogie, par J. A. H. Lucas. Paris, 1818. 8° Journal of Science and the Arts, No. 10 and 11. On the Safety Lamp for Coal Miners, with some Researches on Flame, by Sir Humphry Davy. London, 1818. 8° An Introductory Lecture delivered at the Royal Dispensary for the Diseases of the Ear to a Course on the Anatomy, Physiology, and Diseases of that Organ, by J. H. Curtis, Esq. London, 1818. 8° Journal of the Academy of Natural Sciences of Philadelphia, No. 6. Philadelphia, 1817. 8° Pathological and Surgical Observations on Diseases of the Joints, by B. C. Brodie, F. R. S. London, 1818. 8° 12. Vetusta Monumenta. Vol. V. plates 19—25. Flora Batava, No. 52. Hypocrisy unveiled and calumny detected in a Review of Blackwood's Magazine. Edinburgh, 1818. 8° Dec. 10. Historia e Memorias da Academia R. das Sciencias de Lisboa. Tom. III, IV, V. Lisbon. 4° Memorias Economicas da Academia Real das Sciencias de Lisboa da Agricultura, das Artes, e da Industria em Portugal e suas Conquistas. Tom. IV and V. Lisbon. 8° Memorias de Litteratura Portugueza publicadas pela Academia Real das Sciencias de Lisboa. Tom. VII. and Tom VIII. Part I. Lisbon. 8° An Account of the History and present State of Galvanism, by John Bostock, M. D. London, 1818. 8° Annals of Philosophy, No. 72. The Philosophical Magazine, No. 247. The Monthly Review for November. The European Magazine for November. An Improved System of Telegraphic Communication, by Thomas Lynn, 2 Edition. London, 1818. 12° A concise Narrative of Facts connected with the Disease which occurred in the District of Jessore, The Editor. The Medical and Chirurgical Society. M. Prevost. Mr. J. A. H. Lucas. The Managers of the Royal Institution. Sir Humphry Davy, Bart. J. H. Curtis, Esq. The Academy of Natural Sciences of Philadelphia. B. C. Brodie, Esq. The Society of Antiquaries. His Majesty the King of the Netherlands. The Author. The Royal Academy of Sciences of Lisbon. Dr. John Bostock. Dr. Thomas Thomson, Mr. Alexander Tilloch Mr. G. E. Griffiths. The Editor. Thomas Lynn, Esq. Dr. Robert Tytler. 1818. Dec. 10. during the Months of August and September, 1817, together with observations upon its Symptoms, Causes, and Treatment, by Robert Tytler, M.D. &c. Calcutta. 8° 17. A Treatise on Marine Surveying, in two parts, by Murdoch Mackenzie, corrected and republished with a Supplement, by James Horsburgh, F.R.S. London, 1819. 8° The Asiatic Journal, No. 36. Mémoire sur la Rapport du Pouce de Fontainier, avec l'once d'eau Romaine moderne et le Quinaire antique, &c. par M. Prony. 8° Note sur un nouveau Moyen de régler la Durée des Oscillations des Pendules, par M. de Prony. 4° Nuovo Stabilimento di Bagni d'Acqua minerali e medicata in Oleggio. Lugano, 1818. 8° L'Attraction détruite par le Mouvement primordial, ou Théorie nouvelle du Cours des Corps célestes et du Mouvement, par M. le Comte de Zuylen de Nyveelt. Paris, 1818. 12° Journal of the Academy of Natural Sciences of Philadelphia, No. 7 and 8. 8° Memorie della Società Italiana delle Scienze residente in Modena, Tomo XVIII. Fascicolo 1° delle Memorie di Matematica. Essays on the Proximate Mechanical Cause of the general Phenomena of the Universe, by Sir Richard Phillips. London, 1818. 12° Primitiae Florae Essequeboensis adjectis Descriptio-nibus centum circiter Stirpium novarum Observationibus criticis, Auct. Georgio Frederico Wilhelm Meyer. Gottingæ, 1818. 4° Mémoire sur le Système Métrique des anciens Égyptiens, contenant des Recherches sur les Connoissances géométriques et sur les Mesures des autres Peuples de l'Antiquité, par E. Jomard. Paris, 1817. fol. Icones ad illustrandam Anatomem comparatim, Auct. J. A. Albers. Lipsiae, 1818. fol. 24. F. G. W. Struve, Observationes Astronomicas institutas in Specula Universitatis Caesareae Dorpatensis, Vol. I. Observationes, 1814 et 1815, una cum Reductionibus. Dorpiti, 1817. 4° Nuovo Metodo di dividere gl' Instrumenti di Matematica, Saggio del Sig. Tito Gonnella di Firenze. Pistoja, 1816. 8° Jan. 14. Del Movimento e della Misura delle Acque cor- 1819. Donors. James Horsburgh, Esq. The Editors. M. de Prony. S. Pietro Paganini. The Count de Zuylen de Nyveelt. The Academy of Natural Sciences of Philadelphia. La Società Italiana. Sir Richard Phillips. M. G. F. W. Meyer. M. E. Jomard. Dr. J. A. Albers. Professor F. G. W. Struve. Sig. Tito Gonnella. 1819. Jan. 14. renti, Memoria Idraulica di Antonio Tadini. Milano, 1816. Medico-Chirurgical Transactions. Vol. IX. Part 2. New View of Society.—Tracts relative to this subject, with an Account of the public Proceeding connected with the subject which took place in London in July and August, 1817, by Robert Owen. London, 1818. The Philosophical Magazine, No. 248. Annals of Philosophy, No. 73. The Monthly Review for December. The European Magazine for December. A Journal of Science and the Arts, No. 12. A Chart of Banca and Gaspar Straits. Notice Biographique, par B. G. Sage. Paris, 1818. Elements of Medical Logic, illustrated by practical Proofs and Examples, including a Statement of the Evidence respecting the contagious nature of the Yellow Fever, by Sir Gilbert Blane, Bart. London, 1819. A Brief Sketch of the Causes which first gave rise to the late high Price of Grain in Great Britain, and to the consequent apparent necessity for the Corn Bill, with some Proposals for a more equitable Taxation, by James Curry, M.D. F.A.S. &c. London, 1815. An Essay on the Origin and Operation of the Dry Rot, with a view to its prevention or cure; to which are annexed Suggestions on the cultivation of Forest Trees, and an Abstract of the several Forest Laws, &c. by Robert M'William. London, 1818. Prodromo di Ricerche sperimentale sul Gas illuminante applicata a vari oggetti di privata e di pubblica Economia, del Cav. Giovanni Aldini. Milano, 1818. Saggio Esperimental sul esterna Applicazione del Vapore dell' Acqua dei Bagni e delle filando a Seta, con alcune Osservazioni sul Bagni a vapore, del Cav. Giov. Aldini. Milano, 1818. Saggio sulla Lava Idraulica nuovamente applicata alla Manifatture ed alle riti. American Medical Botany, being a Collection of the native Medicinal Plants of the United States, containing their Botanical History, and Chemical Analysis and Properties, and Uses in Medicine, Diet, and the Arts, with coloured Engrav- Sig. Antonio Tadini. The Medical and Chirurgical Society of London. Mr. Robert Owen. Mr. Alexander Tillock. Dr. Thomas Thomson. Mr. G. E. Griffiths. The Editor. The Managers of the Royal Institution. James Horsburgh, Esq. The Rev. S. Weston. Sir Gilbert Blane, Bart. Dr. James Curry. Mr. Robert M'William. Professor Aldini. Dr. Ralph Bigelow. ings, by Jacob Bigelow, M.D. Boston, 1817. Vol. I. Part 1 and 2. Feb. 4. The Philosophical Magazine, No. 249. Annals of Philosophy, No. 74. The Monthly Review for January, and Appendix to Vol. 87 The European Magazine for January. The first Part of a Letter to the Parisians and the French Nation upon Inland Navigation, containing a Defence of the public character of His Grace, Francis Egerton, late Duke of Bridgewater, by the Hon. Francis Henry Egerton, and including some Notices and Anecdotes concerning Mr. James Brindley. Paris, 1818. Traité complet de Mécanique appliquée aux Arts, contenant l’Exposition méthodique des Théories et des Expériences les plus utiles pour diriger le choix, l’invention, la construction, et l’emploie de toutes les Espèces de Machines, par M. J. A. Borgnis. Des Machines employées dans les Constructions diverses. Paris, 1818. Recherches sur la Mesure des Températures et sur les Lois de la communication de la Chaleur, par MM. Dulong et Petit. Paris, 1818. Mémoires de la Classe des Sciences mathématiques et physiques de l’Institut de France. Années, 1813, 1814, 1815. Paris, 1818. Mémoires de l’Académie Royale des Sciences de l’Institut de France, Année 1816. Paris, 1818. Histoire et Mémoires de l’Institut Royal de France, Classe d’Histoire et de Littérature ancienne. Tome 3ème et 4ème. Paris, 1818. Notices et Extraits des Manuscrits de la Bibliothèque du Roi et autres Bibliothèques, publiés par l’Institut Royal de France. Tome Xème. Paris, 1818. Memoirs of the American Academy of Arts and Sciences. Vol. IV. Part 1. Cambridge, 1818. Report to the Governors of the Veterinary College of London, by W. Sewell, Assistant Professor. London, 1818. The Transactions of the Horticultural Society of London. Vol. III. Part 2. London, 1819. or Sixty Tables elucidatory of the first part of a Course of Lectures on the Grammar of the Arabic Language, delivered in the College of Fort William in Bengal, during the first year of its Institution, by John Baillie, Calcutta, 1801. fol. March 4. Annals of Philosophy, No. 75. The Philosophical Magazine, No. 250. The Monthly Review for February. The European Magazine for February. Observations on the Claims of the Moderns to some Discoveries in Chemistry and Physiology, by G. D. Yeats, M. D. London, 1798. 8° A Statement of the early Symptoms which lead to the Disease termed Water in the Brain, &c. by G. D. Yeats, M.D. London, 1815, 8°, and Appendix to ditto. London, 1819. 8° 18. Flora Batava, No. 53. Lectures on Physiology, Zoology, and the Natural History of Man, delivered at the Royal College of Surgeons, by W. Lawrence, F. R. S. London, 1819. 8° Cours théorique et pratique d’Instruction élémentaire applicable à toute méthode d’enseignement individuel ou collectif, et spécialement à la Méthode d’enseignement mutuel à l’usage de l’Ecole Polytechnique, &c. par P. R. F. Butes de la Sarthe. Paris, 1818. 2 Vols. 8° A System of Practical Nosology, to which is prefixed a Synopsis of the Systems of Sauvages, Linnæus, &c. by David Hosack, M.D. New York, 1818. 8° An Essay on the Chemical History and Medical Treatment of Calculus Disorders, by Alexander Marcer, M.D. F.R.S. London, 1818. 8° 25. Histoire de l’Astronomie du Moyen Age, par M. Delambre. Paris, 1819. 4° Reports of the British and Foreign Bible Society, with Extracts of Correspondence from the Years 1805 to 1818. London, 1810—1818. 6 Vols. 8° Forty-seven Volumes containing the whole or parts of the Holy Scriptures, in 39 different Languages. 4°, 8°, and 12° April 1. An Astronomical Catechism, or Dialogues between a Mother and her Daughter, by Catherine Vale Whitwell. London, 1818. 8° Annals of Philosophy, No. 76. The Philosophical Magazine, No. 251. The Monthly Review for March. The Quarterly Journal of Literature, Science, and the Arts, No. 13. A Letter to the Right Hon. F. Robinson, M.P. &c. &c., on the Plague and Contagion, with re- Dr. Thomas Thomson. Mr. Alexander Tillock. Mr. G. E. Griffiths. The Editor. G. D. Yeats, Esq. His Majesty the King of the Netherlands. W. Lawrence, Esq. Mr. P. R. F. Butes de la Sarthe. Dr. David Hosack. Dr. Alexander Marcer. Mr. Delambre. The British and Foreign Bible Society. Mrs Catherine Vale Whitwell. Dr. Thomas Thomson. Mr. Alexander Tillock. Mr. G. E. Griffiths. The Managers of the Royal Institution. Dr. Aug. B. Granville. ference to the Quarantine Laws, by Aug. Bozzi Granville, M. D. &c. London, 1819. 22. Hydrauliska Försök anstallda vid Fahlu Grufva Åren 1811—1815, af P. Lagerhjelm, J. H. af Forselles och G. S. Kallstenius på Bruks Societetens Bekostnad, Första Delen. Stockholm, 1818. Théorie Élémentaire de la Botanique, ou Exposition des Principes de la Classification Naturelle et de l'Art de décrire et d'étudier les Végétaux, par A. P. de Candolle. Paris, 1819. The Hunterian Oration delivered in the Theatre of the Royal College of Surgeons, by John Abernethy, Esq. London, 1819. A Defence of the Church and Universities of England against such injurious advocates as Professor Monk and the Quarterly Review for January, 1819, by Sir James Edward Smith, M. D. F. R. S. P. L. S. London, 1819. 29. Remarks on the Account of the late Voyage of Discovery to Baffin's Bay, published by Capt. John Ross, R. N. by Capt. Edward Sabine, Royal Artillery. London, 1819. Annals of Philosophy, No. 77. May 6. The Philosophical Magazine, No. 252. The Monthly Review for April. The European Magazine for April. Elémens de Géométrie à trois dimensions, Partie synthétique.—Théorie des Lignes et des Surfaces Courbes, par M. Hachette. Paris, 1817. Seconde Supplément de la Géométrie Descriptive, par M. Hachette, suivi de l'Analyse Géométrique de M. John Leslie. Paris, 1818. 13. Transactions of the Society, instituted at London, for the Encouragement of Arts, Manufactures, and Commerce. Vol. XXXVI. London, 1819. Report of the Committee of the Society of Arts, &c. together with the approved Communications and Evidence upon the same relative to the mode of preventing the Forgery of Bank Notes. London, 1819. Rosa Candolleana, seu Descriptio Novæ Speciei generis Rosæ dicata Pyr. Aug. de Candolle a Cl. An. Thory. Paris, 1819. On the Mammoth or Fossil Elephant found in the Ice at the Mouth of the River Lena, with a Lithographic Plate of the Skeleton. London, 1819. 20. Abhandlungen der Königlichen Akademie der Wis- Mark Beaufoy, Esq. M. A. P. Candolle. John Abernethy, Esq. Sir James Edward Smith. Captain Edward Sabine. Dr. Thomas Thomson. Mr. Alexander Tilloch. Mr. G. E. Griffiths. The Editor. M. Hachette. The Society for the Encouragement of Arts, &c. Mr. C. A. Thory. Mr. Charles Stokes. The Royal Academy of Sciences at Berlin. senschaften in Berlin aus den Jahren, 1814, 1815. Berlin, 1818. Astronomische Beobachtungen auf der Königlichen Universitäts Sternwarte in Königsberg, von F. W. Bessel, Professor, &c. Dritte Abtheilung vom 1 Januar bis 31 Decem. 1816. Königsberg, 1817. Astronomisches Jahrbuch für das Jahr 1821. Berlin, 1818. Memoir on a New and certain Method of ascertaining the Figure of the Earth by means of Occultations of the fixed Stars, by A. Cagnoli, with notes, and an Appendix, by Francis Baily. London, 1819. On Diagnosis, in two parts, Part 1.—The Symptoms of Disease. Part 2.—The Diagnosis of Diseases. London, 1819. On the Mimoses, or a descriptive, diagnostic, and practical Essay on Disorders of the general Health in their various simple and complicated forms, contrasted with some acute and insidious Diseases, by Marshall Hall, M. D. London, 1819. June 10. Annals of Philosophy, No. 78. The Philosophical Magazine, No. 253. The Monthly Review for May, and Appendix to Vol. LXXXVIII. The European Magazine for May. Practical Observations on Telescopes, Opera Glasses, and Spectacles, by William Kitchiner, M. D. 3rd Edition. London, 1818. Further Observations on the internal use of the Hydro-Cyanic (Prussic) Acid in Pulmonary Complaints, Chronic Catarrh, Spasmodic Coughs, Asthma, Hooping Cough, and some other Diseases, with full Directions for the preparation and administration of that Medicine, by A. B. Granville, M. D. &c. &c. London, 1819. A Manual of Chemistry, containing the principal facts of the Science in the order in which they are discussed and illustrated in the Lectures of the Royal Institution of Great Britain, by William Thomas Brande, Esq. Secretary to the Royal Society, &c. &c. London, 1819. A Treatise on the Magnetism of the Needle, &c. by George Samuel Clarke, Esq. London, 1818. Traité complet de Méchanique appliquée aux Arts.—Des Machines hydrauliques, par J. A. Borgnis. Paris, 1819. Professor F. W. Bessel. Professor Bode. Francis Baily, Esq. Dr. Marshall Hall. Dr. Thomas Thomson. Mr. Alexander Tilloch, Mr. G. E. Griffiths. The Editor. Dr. William Kitchiner. Dr. A. B. Granville. W. T. Brande, Esq. G. S. Clarke, Esq. Mr. J. A. Borgnis. Astronomical Observations made at the Radcliffe Observatory at Oxford, from May 1, 1818, to May 1, 1819, by and under the direction of the Rev. Abram Robertson, D.D., F.R.S., Savi- lian Professor of Astronomy and Radcliffe Observer. MS. A Critical Examination of the first Principles of Geology, in a Series of Essays, by G.B. Greenough, Pres. Geol. Soc. &c. London, 1819. 17. A Succinct Statement of the Question respecting the Water Companies of London. London, 1819. A Bust of the Right Hon. Sir Joseph Banks, Bart. G.C.B. President of the Royal Society, executed in White Marble, by Francis Chantrey, Esq. F.R.S. and R.A. 24. Transactions of the Horticultural Society of London. Vol. III. Part 3. London, 1813. July 1. Annals of Philosophy, No. 79, and Supplement to Vol. XIII. The Philosophical Magazine, No. 254. The Monthly Review from June. The European Magazine for June. Archaeologia, or Miscellaneous Tracts relating to Antiquity published by the Society of Antiquaries of London. Vol. XIX. Part 1. London, 1819. Vetusta Monumenta. Vol. V. Plates 26 to 32. fol. 8. The Quarterly Journal of Litterature, Science, and the Arts, No. 14. Traité pratique de l'Oeil Artificiel, ou Expériences et Observations sur l'Art de cacher la difformité totale ou partielle de l'organe de la vue à la suite de toutes maladies, operations, et accidens quelconques, &c. Paris, 1818. With Specimens of Artificial Eyes. The Trustees under the Will of the late Dr. Radcliffe. G.B. Greenough, Esq. The Directors of the Grand Junction Water Works. Francis Chantrey, Esq. The Horticultural Society. Dr. Thomas Thomson. Mr. Alexander Tilloch. Mr. G.E. Griffiths. The Editor. The Society of Antiquaries. The Managers of the Royal Institution. M. Hazard Mirault. INDEX TO THE PHILOSOPHICAL TRANSACTIONS FOR THE YEAR 1819. A Amidine, matière intermédiaire entre la gomme et l'amidon, 52 Amidon, observations sur sa décomposition à la température atmosphérique par l'action de l'air et de l'eau 29 — sur la gomme produite par sa fermentation spontanée, 50 — sur le changement de poids qu'il épreuve par sa fermentation à l'air, 54 — sur le gaz hydrogène produit par sa fermentation, 57 Anderson, James, Capt. in the Royal Navy, some observations on the peculiarity of the tides between Fairleigh and the North Foreland; with an explanation of the supposed meeting of the tides near Dungeness, 217 Arbury Hill, operations for determining the variation in the length of the pendulum vibrating seconds at that station in the Trigonometrical Survey, 374 — its latitude, 403 B Babbage, Charles, Esq., on some new methods of investigating the sums of several classes of infinite series, 249 Brewster, David, LL.D., on the laws which regulate the absorption of polarised light by doubly refracting crystals, 11 INDEX. Brewster, David, LL.D., on the action of crystallized surfaces upon light, - 145 on the optical and physical properties of Tabasheer, - 283 Brinkley, John, D.D., the results of observations made at the Observatory of Trinity College, Dublin, for determining the obliquity of the ecliptic, and the maximum of the aberration of light, - 241 C Chronometer, observations for the error of it, - 439 Clifton, in Yorkshire, operations for determining the variation in the length of the pendulum vibrating seconds at that station in the Trigonometrical Survey, - 371 its latitude, - 395 Clock, comparisons of it with the chronometer, - 434 observations for determining its rate at different stations of the Trigonometrical Survey, - 427 Corpora lutea, a treatise on the subject of them - 59 are produced previous to, and independent of, sexual intercourse, - 60 never met with before puberty, - 59 Crystals, absorbing, list of those with one axis, - 15 list of those with two axes, - 19 Crystals, doubly refracting, on the influence of their polarising force, upon the polarising force which accompanies partial reflection, - 150 on the change produced upon the polarising angle by their interior forces, - 150 on the change produced upon the polarisation of the reflected ray by their interior forces, - 152 D Davis's Straits, and Baffin's Bay, observations to determine the variation of the needle in those places, - 140 Davy, Sir Humphry, Bart., some observations on the formation of mists in particular situations, - 123 Dungeness, meeting of the tides there, - 223 Dunnose, operations for determining the variation in the length of the pendulum vibrating seconds at that station in the Trigonometrical Survey, - 379 INDEX. E Earth, on its mean density, - 84 ——— on the irregularities of its surface, - 89 ——— of its figure, - 417 Ecliptic, results of observations made at the Observatory of Trinity College, Dublin, for determining the obliquity of it, and the maximum of the aberration of light, - 241 Equations, numerical, a new method of solving all orders of them by continuous approximation, - 308 Error, remarks on the probabilities of it in physical observations, and on the density of the earth, considered especially with regard to the reduction of experiments on the pendulum, - 70 Eye, an account of a membrane in the eye, now first described, - 300 F Fairleigh and the North Foreland, phenomena of the tides between them on the English coast, and Cape d'Alpréé and Calais on the French coast, - 218 H Heat, on the influence it possesses in modifying the absorbent power of crystals, - 25 Home, Sir Everard, Bart., the Croonian Lecture. On the conversion of pus into granulations of new flesh, - 1 ——— on corpora lutea, - 59 ——— an account of the fossil skeleton of the Proteosaurus, - 209 ——— reasons for giving the name Proteosaurus to the fossil skeleton of an animal, which has been described, - 212 ——— on the ova of the different tribes of opossum and ornithorhyncus, - 234 Horner, W. G. Esq., a new method of solving numerical equations of all orders, by continuous approximation, - 308 INDEX. I Jacob, Arthur, M.D. an account of a membrane in the eye, now first described, - 300 Isle of Wight, operations for determining the variation in the length of the pendulum vibrating seconds at that station in the Trigonometrical Survey, - 379 K Kangaroo, the ova of that animal described, - 235, 237 Kater, Capt. Henry. An account of experiments for determining the variation in the length of the pendulum vibrating seconds at the principal stations of the Trigonometrical Survey of Great Britain, - 337 Appendix to his Account of experiments, &c. - 427 L Latitudes and Longitudes of the different stations in the Trigonometrical Survey, - 384 Leith Fort, operations for determining the variation in the length of the pendulum vibrating seconds at that station of the Trigonometrical Survey, - 364 its latitude, - 392 Light, on the action of crystallized surfaces upon it, - 145 polarised, on the laws which regulate its absorption by doubly refracting crystals, - 11 on the absorption of it by crystals with one axis of double refraction, - 12 on the absorption of it by crystals with two axes of double refraction, - 17 transmitted, on the effects produced upon it by a change in the mechanical condition of the surfaces of crystals, - 146 London, operations for determining the variation in the length of the pendulum vibrating seconds at that station in the Trigonometrical Survey, - 377 its latitude, - 407 INDEX. M Marcet, Alexander, M. D. on the specific gravity and temperature of sea waters, in different parts of the ocean, and in particular seas; with some account of their saline contents, 161 Mists, some observations on their formation in particular situations, 123 N Needle, magnetic, on the anomaly in the variation of it as observed on ship-board, 96 observations on the dip and variation of it, and on the intensity of the magnetic force; made during the late voyage in search of a north-west passage, 132 Needles, compass, on the irregularities observed in the direction of those of H. M. S. Isabella and Alexander in their late voyage of discovery, and caused by the attraction of the iron contained in the ships, 112 O Observations, multiplied, on the estimation of the advantage to be derived from them, 70 Ocythoë, on that genus, 107 Opossum, on the ova of that tribe, 234 Ornithorhyncus, on the ova of that tribe, 234 Ovarium, human, its natural structure described, 59 P Pendulum, rolling, Euler's formula for it, 94 Pendulum vibrating seconds, an account of experiments for determining the variation in its length, at the principal stations of the Trigonometrical Survey of Great Britain, 357 description of the one used in the above experiments, 341 the mode of determining its expansion, and a statement of the results, 343 INDEX Portsoy, operations for determining the variation in the length of the pendulum vibrating seconds at that station of the Trigonometrical Survey, 356 its latitude, 389 Presents, a list of those made to the Royal Society, from November 1818, to July 1819, 509 Proteosaurus, an account of the fossil skeleton of that animal, 209 reasons for giving this name to the fossil skeleton which has been described, 212 Pus, on the conversion of it into granulations of new flesh, 1 changes which it undergoes upon the surface of a sore, 3 its presence necessary to produce granulations or new flesh in sores, 7 coagulated, rendered tubular by the extrication of its carbonic acid gas, 9 R Refraction, corrections for it, 160* S Sabine, Capt. Edward, on irregularities observed in the direction of the compass needles of H. M. S. Isabella and Alexander, in their late voyage of discovery, and caused by the attraction of the iron contained in the ships, 112 observations on the dip and variation of the magnetic needle, and on the intensity of the magnetic force; made during the late voyage in search of a north-west passage, 132 Sal-ammoniac, a saturated solution of it has a greater power of coagulating pus than any other substance, 7 its effects upon the surface of a sore, 8 Saussure, Theodore de, (Professeur de Minéralogie dans l'Académie de Genève, &c.) observations sur la décomposition de l'amidon à la température atmosphérique par l'action de l'air et de l'eau, 29 MDCCCXIX. INDEX. Say, Thomas, Esq. on the genus ocythoë, 107 Scoresby, William, Jun. Esq., on the anomaly in the variation of the magnetic needle, as observed on shipboard, 96 Sea water, its temperature at the surface, and at different depths, as observed by Lieut. Parry and others, 203 Sea waters, on their specific gravity and temperature, in different parts of the ocean, and in particular seas; with some account of their saline contents, 161 their specific gravities, 169 on their saline contents, 191 Series, infinite, on some new methods of investigating the sums of several classes of them, 249 Serum, experiments made by Mr. Bauer, to prove that globules are produced in it, 2 Shanklin Farm, in the Isle of Wight, its latitude, 408 T Tabasheer, on its optical and physical properties, 283 the absolute refractive power of that and other bodies, 287 Tides, some observations on the peculiarity of those between Fairleigh and the North Foreland; with an explanation of the supposed meeting of the tides near Dungeness, 217 Trigonometrical Survey of Great Britain, observations for connecting the stations of it with those of the pendulum, 501 U Unst, operations for determining the variation in the length of the pendulum vibrating seconds at that station of the Trigonometrical Survey, 344 W Water, a description of an apparatus for raising it from the bottom of the sea, 164 INDEX. Y Young, Thomas, M. D. remarks on the probabilities of error in physical observations, and on the density of the earth, considered especially with regard to the reduction of experiments on the pendulum, - 70 Postscript to his remarks on the reduction of experiments, &c. - 160* ERRATA. P. l. 32, 10, for 100 : 180,46, read, 100 : 80,46. 35, 12, note, for ce dernier aussi, read, ce dernier ainsi. 35, 13, note, for une légère, read, une légère. 36, 18, for à $\frac{1}{25}$, read, à $\frac{1}{129}$ éme. 39, 14, for rapport de 100:83, read, rapport de 100:83. 41, 6, for ligneux amilacé 92, read, ligneux amilacé 9,2. 42, 6, for 26 centim. cubes, read, 96 centim. cubes. 45, 6, for 42 heures, read, 42 jours. 196, 14, for 374, read 3.74. — 20, for 0,314, read 39.23. — 21, for be be, read be. 199, 8, and 9, for so that, read and that. — 19, for 0.975, read 0.995. — 21, for 21,460, read 21,580.