ss^ 



N 



E X. 



Defcotils, Cituen, ii. 91, 337 



Def.ription, Mineralogical, of Gibraltar, ii. 

 i8s„ 219. Geographical, of North Ame- 

 rica, by Renne!, ii. 253. Of the Country 

 near the North Weftcrn Lalics of America, 

 ii. 3 I 5 



Dsfcroifilles, ii. 368 



De Serra, M. Correa, ii. 254 



De SefTarts, i. 46. ii. 237 



Des Fontaines, Cit. ii. 156 



Defmond's Patent for Tanning, i. 26 



Defportes, Felix, i. 5 1 1 



Detached Efcapements, i. 54 



Detonations produced by Concuflion of the 

 Oxymuriate with various Bodies, by Four- 

 croy and Vauquelin, i. 168. With Ox- 

 ypenated'Muriate of Potafli, ii. 29a, 469 



De Trebra, M. i. 99 



Deyeux, i. 228 



D'Harleville, Cit. Colin, ii. 239 



D'Herbelot, ii. 258 



Diabetes Mellitus, i. 285. ii. 427, $23 



Diamonds of Brazil, Hiftory of, i. 24. Ana- 

 lyzed by Tennant, i. 177 



Dies for making Screws, i. 163 



Dietrich, Cit. i. 2 10 



Dilatation, of Elaftic Fluids, i. 143 



Diofcorides, ii. 136. 



Dip of the Horizon, Correftion for, i. 151 



Difcovery of America, i. 73, 107. Prize 

 QiJeftion on the, ii. 328 



Difpcrfive Power of Fluids, Meafure of, i. 2 



Diftilled Vinegar, Method of detefting the 

 Adulteration of, ii. 120 



T)']i€ on Acid of Lemons, ii. 43 



Dodd, R. on the Tunnel beneath the Thames, 

 ii. 239,473 



DoUond, i. I. ii. 234 



Dolomku, i. 98, 359 



Donation, Prize, by Count by Rumford, i. 

 t88 



Dondi, his ancient Watch, ii. 51 



Doubler, Eleftrical, Manipulation of, i. 397. 

 ii. 368 



Drainage without Machines, ii. 491 



Drugs, Examination of the Purity of, ii. 1 18. 



Dryden, ii. 13 



Drynefs of the Atmofphere, Precurfor lef 

 Rain, i. 511 



Du BuilTon, ii. 43 



Da Cangc, i. 138 



Duhamel, M. ii. 105, 190, 307 



Dumcutier, Cit. ii. 210 



Dunaghoo, Mr. ii. 224 



Duncan, Dr. i. 264. Andrew, jun. M.D. 

 and Andrew, fen. M.D. Annals of Medi- 

 craefi.287. Andrew, jun. M.D. ii. 265 



Duncombe, John, ii. 96 



DundonaU), Lord, on Coal, i. 48 7. His Coal 

 Tar, i. 494 



Dupont de Namurs, i. 47 



Dupratz, ii. 304 



Durer, Aibtrt,. ii. 89 



Dutch Cbemifts on carbonated Hydrogen, i. 

 44. 



DuTernois, i. 235 



Duviilard, i. 46. 



Dyanniere, i. 49. 



Dyeing, New Bark for, called Paraguatan, ii. 



93 

 Dye, Black, ii. 339 

 Dying, a£(lfted by the Soap of Wool, i. 43 



Earth, Sydney, Doubts concerning its Ex- 

 jftence, i. 404. Fufibility of, i. 142. Fi- 

 gure, Rotation, and Projeftion of, ii. 39. 

 Improbability of its being deftroyed by a 

 Comet, ii. 42. Sydney, docs not exift, ii. 

 72. Arj^iilaceous, Method of Separation 

 of from Magnefia, ii. 83. Rotation of the, 

 proved by Experiment, ii. 84. Leonard 

 de Vinci's Theory of, ii. 84. Ancient 

 State of, ii. 85. Theory of, ii. 86. Fi- 

 gure of, ii. 184. Prize Q^eftion on the 

 Changes of, ii. 238. New, or Glucine, 

 ii. 359, 39;. Its Denfity deduced from 

 Experiment, ii. 446 



Eaftburne, Henry, ii. 96 



Eaton, on the Arts in Turkey, ii. 355 



Eau de Luce, i. 80, 166 



Eccho, remarkable, lieard from an Air Bal- 

 loon, ii. 377 



economical Laboratory of Guyton, ii. 210. 



Ecphantus, ii. 185 



Edgeworth, Richard Lovell, Efq. F.R S. and 

 M.R.I.A. on the Telegraph, ii. 319. Mr. 

 Lovell, jun. ii. 314 



Edinburgh, Tranfaftions of, ii. 191 



Edrifi, ii. 256 



Edwards, Bryan, Efq. ii. 280. Mr. ii.95. 33* 



Eimbke, Dr. ii. 8 



Elaftic Strings, i. 328. Bitumen, ii. 249 



Eleftric Charge, Method of meafuring.i. 156. . 

 Filh, Account of the Organs of, i. 357. 

 Intenfity, Meafure of, i. 87 



Eleflrical Machines, i. 83. Defcription of a 

 new Portable, by Mr. Pearfon, i. 506. 

 Doublet, Manipulation of, i. 397. Inftru- 

 ment. New, i. 1 7. Power of, meafured, ii. 



215. By Friftion, of Silk. ii. 420 

 Eleftricity, i. 48. Spining Condenfer of, i. 



i5. New Phsenomenon of its Undulation, 

 i.. 83. Of the Torpedo, explained, i. 355. 

 Multiplier of, Obfervations on, i. 394. 

 Hiftory and Account of the Proccffes for 

 accumulating, i. 396. Pofitive and Nega- 

 tive, i. 433. Apparatus for Experiments 

 of, ii. 435. Meafure of the Power of, ii. 



216. Obfervations on, ii. 396, 420, 438, 



Eleftrometer, Defcription of an improved, i. 



270. ii. 439,441, 515 

 Eleftrophore, Obfervations on the AAion of, 



'•355 

 Elers, Mr. ii. 319 

 EUicott, his Pendulum, i. 60. Andrew, on 



the Phenomenon of Looming, i. 152 

 Emanations of Odorant Bodies, i. 153,431 

 Emery, ii. 54 



Enclyclopedie Methodique, i. 48 

 Engine, Steam, Hiftorical Remarks on the 



Invention of, i. 419. Comparifon of, i. 



422. Boulton and Watt's, ii. 230. Mr. 



Sadler's, ii. 231. Working by a Pifton, 



Account of, ii. 228 

 Engineers, civil, Origin of the Society of, ii. 



47,95 

 Engraving on Glafs Plates for Printing, ii. 



60. On Wood, ii. 63 

 -^ s, Method of cleaning of, ii. 265. 



Machine for Ruling the Lines of, ii. 429 

 Eolian Harp, Defcription of, ii. 12 

 Equations,Quadratic;Rule for their Solution, 



«• »19 



Eratofthenes, ii. 136, 238 



Efcapement, Crown Wheel, ii. i;o. 'De- 

 fcriptions of, various, ii. 50. Dead-beat, 

 ii. 52. Horizontal, ii. 53. Free or de- 

 tached, ii. 54. Common Anchor, ii. 54. 

 Free, of Mudge, ii. 56. New, by Nichol- 

 fon, ii. ;9. New, for Watches, by Mr. J, 

 Prior, ii. 363 



Ether, Vitriolic, produces Cold by Evapora. 

 tion, i. 50-4 



Eudiometers, i. 141. With the Sulphatt 

 of Potafli, by Guyton, i. 268 



Euler, ii. 176 



Euftathius, ii. 16 



Evaporation, its EfFeft as to Refraflion, i. 

 1 46 



Evelyn, Sir Geo. Shuckburgh, Bart. F.R.S. 

 and A.S. his Table of Prices of Provifion, 

 &c. ii. 284 



Excife, afFcfts Paper-ftaining, i. 23. Af- 

 fefls Soap-making, i. 43 



Excitation of Elcftricity, ii. 438 



Expanfion Bar, i. 63. Balance, i. 64. Of 

 Metals, i. 58 



Extinguilhing Fire, Compofition for, ii. 279 



Extradlion of Oil, ii. 90 



Eye, Nature of the Procefs of, to produce 

 diftinft Vifion, 1.305,472. Deprived of 

 tire Chryftaline Lens, i. 311. Of Birds, 

 Obfervations on, i. 472. Experiments on 

 the Cornea of, i. .J74. Obfervations on 

 the focal Adjuftment of, i. 476. Of Qua- 

 drupeds and Birds, Peculiarities of Struil- 

 urc of, i. 477. Of Fiflies, Peculiarities of 

 the Strufture of, i. 478, 547. Imperfec- 

 tions of the Sight of, i. 549. Treatment 

 of the Difeafes of, i. 550 



F. 



Fabbroni,Sig.Gio. i. 496. On the Bleaching 

 of Engravings, ii. 265. On the Extinftioi* 

 of Fire, ii. 279 



Fabriguette, Michael, i. 40 



Faden, William, ii. 96 



Falcandus, Hugo, i. 139. 



Falconet, ii. 50 



Fata Morgana, Account of, i. 225, 285. ii. 

 416 



Faujas, i. 48, 494 



Fajello, ii. 19 



Feathers, Cock and Hen, why they are in- 

 ferior to Goofe Feathers, i. 401 



Fecula, i. 274 



Fell, Mr i. 507 



Felting, Procefs explained by Menge, i. 401. 



Fergufon, Mr. ii. 123 



Fernandez, Dominique Garcia de, ii. 53 



Ferriar, Dr. ii. 188 



Figures, ftrange, feen in the Air and the 

 Sea, i. 225. Of the Earth, ii. 39. And 

 Motions of the Earth, aneient Opinions 

 concerning, ii. 184 



Files, Machine for cutting, ii.310 



Filtration, by Afcent, ii. 356 



Fire, Compofuion for Extinguifliing, ii. 279 



. Arms, Improvements in, i. 517. Greek, 



Compofition of, ii. 90 



Fifli, Eltflric, Account of the Organs of, i. 



357 

 Fifhes* Eye?, Peculiarities of the Struilurc 

 of, i. 47S, 547 



Filher» 



