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28. A Theory of Covered Ways and Arches. Nicholson, December, 1807, p. 2*.

29. Remarks on a Pamphlet of Professor Vince. Nicholson, April, 1808, p. 304; pointing out the mathematical fallacy of the Professor's supposed refutation of the hypothesis of Newton, respecting the cause of Gravitation.

30. Calculation of the Rate of Expansion of a supposed Lunar Atmosphere. Nicholson, June, 1808, p. 117.

31. Determination of the Figure of a gravitating Body. Nicholson, June, 1808. p. 208.

32. Calculation of the Attraction of a Spheroid. Nicholson, August, 1808, p. 273.

33. A Review of Sinclair on Longevity. British Critic.

34. Abstracts and Criticisms in the "Retrospect," about 1808 and 1809.

35. Hydraulic Investigations. Phil. Trans. 1808, p. 164; principally subservient to an intended Croonian Lecture.

36. A Syllabus of a Course of Lectures on the Elements of the Medical Sciences; 8vo. London, 1809- These Lectures were delivered for two seasons at the Middlesex Hospital. (Dr. Young remarks, that "they were little frequented, on account of the usual miscalculation of the Lecturer, who gave his audience more information in a given time, than it was in their power to follow.")

37. Computation of the Depression of Mercury in the Barometer. Nicholson, March, 1809, p. 215. A Continuation of the Paper on the Cohesion of Fluids, October, p. 81.

38. Remarks on the Friction of Wheels, in Buchanan's Essay on Wheel-work, 8vo. Glasgow, 1809.

39. A Croonian Lecture on the Heart and Arteries. Phil. Trans. 1809, p. 1: attempting to demonstrate, on mathematical principles, that the larger arteries can have little or no concern in propelling the blood by their active muscular powers.

40. A Numerical Table of Elective Attractions. Phil. Trans. 1809. p. 148: with remarks on the sequences of double decompositions, showing that if numerical expressions of electric attractions are possible, their effects in double decompositions may be compendiously expressed by tables of sequences only.

41. A Memoria Technica for Elective Attractions, in a fewLatin Hexameters. Nicholson, April, 1809.

42. Account of the Pharmacopeia Londinensis, in Cumberland's London Review, 1810.

43. To the earlier volumes of the Quarterly Review he contributed a variety of articles, which frequently, according to the custom of modern times, contained more of original research than of immediate criticism. To Vol. I. La Place, Action Capillaire. Vol. II. Haslara, Pinel, Cox, and Arnold, on Insanity; La Place, Refraction Extraordinaire. Vol. III. Herculanensia; Jones on the Gout; Memoires d'Arcueil. Vol. VI. Cuthbert on the Tides; Vol. VIII. Davy's Chemical Philosophy. Vol. IX. Blackall on Dropsies. Vol. X. Adelung's Mithridates; Gothe on Colours. Vol. XI. Malus, Biot, Seebeck, and Breuister, on Light; Bancroft on Dyeing; Davy's Agricultural Chemistry; Adams on Ectropium. Vol. XIII. Wells on Dew. Vol. XIV. Jamieson and Townsend on Languages; Pym and Fellowes on Yellow Fever, an article printed, but not published in the work. Vol. XIX, p. 411. Restoration and Translation of the Inscription on the Sphynx.

44. Berzelius on Definite Proportions, from the German, appeared in several successive numbers of the Philosophical Magazine, from January 1813 to April 1814.

45. A Theory of the Tides. Nicholson, July, August, 1813.

46. An Introduction to Medical Literature, including a System of Practical Nosology, 8vo. London, 1813: a work of consider able labour, though far less arduous than the " Natural Philosophy." The Appendix contains an abstract of Berzelius's Animal Chemistry, from the Swedish. To a second edition, published in 1823, were added the References to later Journals, and an Essay on Palpitations, which first appeared in the fifth volume of the Medical Transactions of the College of London.

47. Remarks on the Employment of Oblique Riders, and on other Alterations in the Construction of Ships. Phil. Trans. 1814, p. 303; the substance of a Report before presented to the Board of Admiralty, relating to Sir Robert Sepping's Improvements, with some additional illustrations.

48. An Investigation of the Thrust of soft Substances. Hutton's Mathematical Dictionary; Edition 2. 1815. Article, Pressure.

49. A Practical and Historical Treatise on Consumptive Diseases; 8vo. London, 1815; being a condensed abstract of every thing recorded to have been said or done, with regard to Consumption. Particular circumstances had pressed the publication of this work within nine months after it had been commenced.

50. In the eighteenth volume of the Archaeologia, London, 1815, appeared some Remarks on Egyptian Papyri, and on the Inscription Of Rosetta, annexed to a communication made by Sir William Edward Rouse Broughton, Bart. They contain an interpretation of the principal parts of both the Egyptian Inscriptions on the Pillar found at Rosetta, And Consequently

Jl KEY TO THE LOST LITERATURE OP ANCIENT EGYPT; though,

for professional reasons, the discovery was made public with as little parade as possible.

51. Extracts of Letters and Papers relating to the Egyptian Inscription of Rosetta, in the Museum Criticum of Cambridge, Part VI. 8vo. 1815; a Correspondence with MM. Silvestre de Sacy and Akerblad.

52. An Investigation of the Pressure sustained by the fixed supports of flexible Substances. Phil. Mag., September, 1813, applied to the Hoops of Casks, and to Dock Gates.

53. An Algebraical Expression of the Values of Lives. Phil. Mag., January, 1816, with a Diagram.

54. Account of some Thebaic Manuscripts, written on Leather. Legh's Narrative, 4to. London, 1816.

55. Additional Letters relating to the Inscription of Rosetta; the first addressed to the Archduke John, who had lately been in England; the second to M. Akerblad, Museum Criticum VII. The Letters were printed and distributed in 1816; the Journal wat not published till 1821. They Announce The Discovery Of The

RELATION BETWEEN THE DIFFERENT KINDS OF EGYPTIAN LETTERS, Or Characters; the basis on which the system of M. Champollion was afterwards erected.

56. Letter of Canova, and two Memoirs of Visconti, translated from the French and Italian. 8vo. London, 1816. A volume of 200 pages, which was completed in twelve days; together with remarks on an error of Delambre, which was afterwards confuted more at large by Mr. Cadell.

57. It was in 1816 that Dr. Young complied with an application made to him by Mr. M'Vey Napier, to write some articles for a Supplement to the Encyclopaedia Britannica, conducted under the superintendence of that gentleman, and completed in 1825.

The Articles which he furnished were: Atwood —• Addendum to Annuities — Bathing — G. Beccaria — Bloch — Borda —Boulton —Bramah — Bridge— Brisson —Bryant —Camus— Notet on Carpentry—Cavallo — Cavendish Chromatics —Cohesion— Condamine —Coulamb — Dollond—Dolomieu—Duhamel —Egypt — Fermat — Fluents — F. Fbntana — G. Fontana—J. R. Forster—J. G. A. Forster—Fourcroy—Frisi— Guyton de Morveau — Herculaneum— Hydraulics — Ingenhousz — Lagrange— La Lande—Lambert—Languages—Lemmonier—Luc — Mai us —Maskelyne — Mason — Mechain — Messier — Orme — Pallas _ Pauw— Porson — Preservers of Life — Road-making — Robison — Rush — Steam-Engine — Tennant —Thomson Count Rumford —Tides — Tooke — Wakefield — Watson — Weights and Mea sures — Polarisation by Arago, translated, with Notes. In all, about sixty-three articles, each marked with two different letters. (These were two consecutive letters of the sentence " Fortunam ex aim :" the u infortunam being sometimes printed as a v.)

58. Remarks on some Theorems relating to the Pendulum. Phil. Trans. 1818, p. 95, in a Letter to Captain Kater.

59. Translation of some Greek Inscriptions. Light's Travels, 4to. London, 1818.

60. Specimen of a Greek Manuscript in the possession of the Earl of Mountnorris, 1819. Archaeologia, vol. xix. This may possibly have been a pawnbroker's account: another piece nearly resembling it was sent by Mr. Salt to the British Museum.

61. Remarks on the Probabilities of Error in Physical Experiments, and on the Density of the Earth, considered especially with regard to the Reduction of Experiments on the Pendulum. Phil. Trans. 1819, p. 70, computing the density of the earth, upon the supposition of the compression of a homogeneous elastic substance only.

62. Dr. Young edited the Nautical Almanac, from the year 1819, for the remainder of his life.

63. Remarks on Laplace's latest Computation of the Density and Figure of the Earth. Brande's Journal, April, 1820; determining the Ellipticity, on the supposition of a compressed elastic substance.

64. Dr. Young furnished quarterly, for many years, to Brande's Philosophical Journal, about twenty pages of Astronomical and Nautical Collections, beginning in 1820; the greater part either original or translated by himself.

65. Appendix to the second edition of Belzoni's Travels, 4to. London, 1821.

66. Elementary Illustration of the Celestial Mechanics of LaPlace, 8vo. London, 1821 ; with some additions relating to the motions of Waves, and of Sound, and to the cohesion of Fluids. (This volume, and the article "Tides," in the Supplement to the Encyclopaedia Britannica, Dr. Young considered as together containing the most fortunate of the results of his mathematical labours.)

67. An Account of some recent Discoveries in Hieroglyphical Literature and Egyptian Antiquities, including the Author's original Alphabet, as extended by M. Champollion, 8vo. London, 1823; with a translation of some Greek Manuscripts on Papyrus, the most remarkable of which was Mr. Grey's "Antigraph " of an Egyptian original then lying on his table; the discovery of which singular coincidence was the immediate cause of the publication of the volume.

68. Hieroglyphics, collected by the Egyptian Society, folio. London, 1823: a collection of Plates of Egyptian Antiquities, subservient to the study of Hieroglyphical Literature, lithographised at the expense of about fifty subscribers, but not at that time publicly sold. The second number, plates 16 to 40, contains nearly all that was known of the interpretation of the Hieroglyphics, the evidence for each word being exhibited in a comparative Index.

(This work was entirely carried on by Dr. Young; but the subscriptions not being adequate to the expenses, it was afterwards made over to the Royal Society of Literature, he undertaking to continue the supervision as before.)

69. A finite and exact Expression for the Refraction of an Atmosphere nearly resembling that of the Earth. Phil. Trans. 1824, p. 159: a computation derived from an optical hypothesis not exactly agreeing with the probable height of the physical atmosphere, but affording correct results.

70. Remarks on Spohn and Seyffarth. Brande's Phil. Journal, October, 1826, in a Letter addressed to the Baron William von Humboldt.

71. A Formula for expressing the Decrement of Human Life; in a Letter addressed to Sir Edward Hyde East, Bart. Phil. Trans. 1826; intended to render the interpolation from the best observations more regular: it is followed by a correction of Dr. Price's mistake, respecting the periodical payments of annuities.

72. Practical Application of the Doctrine of Chances, as it regards the Subdivision of Risks. Brande's Phil. Journ., October, 1826; showing the Limitations under which Speculations on Probabilities may be conducted with prudence.

73. Remarks on Mr. Peyron's Account of the Egyptian Papyrus. Brande's Phil. Journal, January, 1827 — the great Greek Papyrus of Turin: in which Mr. Grey's three contracts are cited and explained,— not two of them only, as had been supposed by Mr. Peyron.

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