I 



N 



t) 



X. 



Chaptal, on the Soap of Wool, i. 40. On tlie 

 cold Caves of Roqueforr, i. 233. On Blow- 

 ingMachines, i;26. OnNitrc,ii. 13. On 

 the Caule of Difference between the Acet- 

 ous and Acetic Acids, ii. 518 



Charafler, Univerfal, ii. 189. By Dr. An- 

 derfon, ii. 190. By Dr. Brown, ii 341. 



Charcoal, reduces Metals in the humid Way, 

 ii. 404. Its imperfeft conducing Power, 

 as to Heat, is of great Confequence in 

 Cliemiftry, ii. 499 



Charj^e, Elcftric, Method of meafuring, i. 

 156 



Charles Vth, i. 109 



Charlevoix, Father, ii. 304 



Charmes, Pajot dcs, ii. 417 



Charybdis, Defcription of, ii. 12, 17 



Chauifier, i. 144, 169, 271. On Hats, i. 



399. 5^0 



Chemical Affinity, Doubts as to its Exift- 

 ence, ii. 161 



■Chevalier, M. ii. Igi 



Chiavenna, Cold Caves of, i. 131 



Chrome, a new Metal, ii. 145, 387,441 



Chriftie, Mr. i. 598 



Chryfolite, Analyfis of, ii, 414 



Chryftals, Method of obtaining the pure fixed 

 Alkalis, i. 164. Qoartz, of Gibraltar, ii. 

 187 



Cigna, i. 396 



Cinnabar, Artificial, new and improved Pro- 

 cefs for making, ii. z 



Civil Engineers, Society of, ii. 47, 95 



Cleaning of Prints, Method of, ii. 265 



Cleghorn, Dr. i. i86 



Cleomedes, ii. 184 



Climate of Ireland, change of in modern 

 Times, ii. 385, 431 



Clive, Lord, ii. 267 



Clocks, i. 56, Obfervations on the Efcape- 

 ments of, i, 429. Various Kinds of Ef- 

 capements, for maintaining Power of, ii. 

 49. 



Clofure of Veffels, Method of, to render air- 

 tight, i. 260 



Clouds, Account of Changes of Colour and 

 Diredion of, i. 265 



Clouet, i. 142. ii. 237 



Coal, Mineral, Proportion of Carbon in, i. 

 487. Cannel, ii. 204, Bovey, ii. 206 



Cobalt, i. 540 



Cockfliutt, James, ii. 96 



Cogs, Wheels without, i. 329 



CogOiall's Rule, i. 450 



Coin, Table of the new French, i. 199 



— — Whether its exchangeable Value can be 

 regulated by the State, ii. 2C1. Whe- 

 ther it could all be made of one Metal, ii. 

 26 t. If two or more Metals be ufed, 

 whether the State can fix the Ratio be- 

 tween them, ii. 262. If only one be fixed 

 and the other left, whether the dearer or 

 cheaper Metal ought to be taken, ii. 262. 

 The beft Figure and Impreffion of, ii. 262. 



Cold, its EfFeft on volatile Oils, by Marguc- 

 ron, i. 182, 227. Winds ilTuing from the 

 Earth, i. 229, EfFefts of upon Water, i. 

 568. Bta Method of producing Artifi- 

 cial, i. 497 



Collier, Jofeph, on Iron and Steel, ii. 190. 

 On the Fermentation and Diftillation of 

 Ardent Spirit, ii. 1 90 



Colman, Mr. 506 



Colour, remarkable Change of in a Negro, 

 ii. 191 



s, of Light, i. 551, 586. Caufe of, 



i. 595. From Specula, ii. 194. ' Veget- 

 able, new and very permanent, ii. 1 5 5. 

 new Phenomenon 6f, in flat Plates of Glafs, 



ii. 313 



Coloured Shadows, i. loi. Apparatus for 



producing fame, i. 104 

 Colouring, prinaiple, Pruflic, i. 142 

 Columbus, Chriftopher, i. 73, 107 

 Combination of Oils with Earths and other 



Subftances, i. 170 

 Combrune, M. ii. 284 

 Combuftion, Obfervations on, i. 350. Of 



Phofphorus in Vacuo, i. 236. L. de Vinci 



on, ii. 87 

 Comet, its Tranfit over the Sun, ii. 357 

 Comets, Eccentricity of the Orbits of, ii. 41. 



Improbability of the Earth being deftroy- 



ed by, ii. 42 

 Compafs, Mariners, Account of the bed Me- 



chanifm for the Sufpenfion of, i. 4»5 

 CompalTes, Proportional, ii. 89 

 Compofition for extinguifliing Fire, ii. 279. 



Of Salts, on the Tables of, ii. 340 

 Concuffion, Detonations produced by, i. 168 

 Condillac, Abbe, ii. 347 

 Condorcet, i. 69,212. His Elements of Ac- 

 counts, ii. 524 

 Conduiftors for Lightning, Obfervations on 



Metallic, i. 434, 4.39 

 Confifcation and Sale of Works of Art by the 



French in Italy, ii. 94 

 Congelation, ii. 163. Of Mercury, i. 143, 



497. Of Volatile Oils, i. 183 

 Conftantinus, i. 138 

 Cooper, Mr. ii. 269 

 Copernicus, ii. 40, 84. 

 Copper, Procefs of working the Ore, Smelt- 

 ing, &c. i. 368. Money, ii. 260. Native, 



large Mafs of, ii. 508. Plates, Glafs pro. 



pofed as a Subftitute for, ii. 60. Plate 



Impreffions, Method of cleaning, ii. 265 

 Coquebert's Account of the French Syftem 



of Meafures, i. 193. Cit. Charles, ii. 72 

 Corn, damaged by improper Houfing, ii. 31. 



Method of determining its Quality or 



Strength, ii. 32 

 Cornea of the Eye, Experiments on, i. 474, 



Treatment of the Difeafes of, i. 550 

 Correal, Francis, ii. 94 

 Corundum Stone, Account of, by C. Gre- 



ville, Efq. ii. 477, 536 

 Coflel,M. i. 170 



Cotton Tree, Perfian, on the, ii. 457 

 Coulomb, i. 97. On Magnets, ii. 80,446 

 Coxe, i. 153. 

 Cramont, i. 97 



Crawford, Dr. i. 289, 518, 529. ii, 108, 114 

 Crell, ii. 10 

 Creroy, Mr. ii. 335 

 Creufot, i. 142 

 Crome, Aug. Fred. Guil. on the comparative 



Culture of Land, i. 47 

 Cromwell, Oliver, ii. 346 

 Crown Wheel Efcapement, ii. 50 

 Cruickfliank, Mr. William, i, 285, 286, 337. 



His Analyfis of Sugar, W^ucilage, &c, ii. 



406 

 Cryftal Iceland, ii. 193 



in 



Critftalllne Forms, ii. 540 



Culture of Land, i. 47 



Cuming, Alexander, i. 59. His Efcape- 

 ment, ii. 58 



Currents, hot and cold in the Sea, i. 573 



Curvature of Bodies produced by chahgi: of 

 Temperature, i. 6i 



CurveLines, of the Surface of Ellipfoid, i.93 



Cuthbertfon, Mr. John, his Air Pump de- 

 fcribed, i. 121, 130, 241, 441. Air Pump, 

 ii. 29. On the Meafurc of Elcftricity, ii. 

 » I 5. Apparatus for producing Wafer by 

 Combuftion, ii. 135. On Elefelica! Bme- 

 ries, and his univerfal Eleftrometer,ii. 525 



Cuvier, Cit. i. 46. ii. 237. On the foflil 

 ■Bones of extinft Animals, ii. ^ij 



Cuypers, C. on Glafs, ii. 420 



Cylinder Printing, i. 18 



D. 



Dabovillc, General, ii. 38 



Dalby, Mr. Ifaac, i. J50, 198. ii. 550 



D'Alembert, ii. 84, 176 



Dalgarme, George, on an univerfal Charac- 

 ter, ii. 345, 418 



Dalton, Mr. John, on the Vifion of Colour** 

 ii. 188 ■■; 



Dalzcl, Andrew, M.A. F.R.S. Edin. on M. 

 Chevalier's Tableau de la Plaine de Troye, 

 ii. 192 



Damafcus Steel, Imitation of, i. 469. ii. 10+ 



D'Andrada, M. i. 14 



Dangos, his Obfervation of the Tranfit of a 

 Comer, ii. 357 



D'Anville, ii, 256 



D'Arcet, i. 40. ii. 37. 



Darwin, Dr. i. 107, 397. ii. 368 



Da Vinci Leonardo, ftiort Sketch of his Life, 

 i. 599. On the Crown Wheel Efcape- 

 ment, ii. 51. Manufcripts of, ii. 84, 90 



Dead-beat Efcapement, ii. 52 



DeBorn, M. ii. 249 



De Cambre, i. 46 



De Chaulnes, i. 590 



Decompbfition of Soap, i. 171. Of Water 

 by Eleftric Difcharges, i. 241 



De Cufa, Nicholas, ii 84 



Defilement, Fortification, i. 94 



De Fondeur, Jean, ii. 51 



De Gama, Vafco, i. 108 



De Genffane, on the Fufion of Ores, &c. i. 



»39 

 Deiman, i. 44, 241 

 DeUval, Mr.E. F.R.S. ii. 319 

 De La Hire, i. 593 

 De La Lande, i. 135 

 De L'Epee, Abbe, Teacher of the Deaf and 



Dumb, ii. 347. 

 De Lifle, Rome, ii. 199. Defaltes, i. 23 J 

 De Luc, M. i. 347 

 De Milly, i. 69. 

 De Morveaux, i. 192 

 Dtnfity of the Earth, ii. 446 

 Depreciation of Money at different Periods, 



ii. 284 

 Derham, Dr. ii. 50, 354 

 Defagulitrs on the Perpetual Motion, i. 377. 



On the Steam Engine, i. 420. ii. 228. On 



Water as a firft Mover, ii. 462 

 De Sauffure, H. B. i. 97, 190, 229, 511 

 Defcartes, i. 305, 588, 593. On univerfal 



Language, ii. 344 



Defcotils, 



