Ammonia oxide of silver, 73. Amphitype, the, of Sir J. Herschel, 171. Report on the Daguerréotype, 366. Archimedes knew the laws of refraction, 3. Arsenicalis, liquor, 133. Asphaltum, employed by Niepce, 31. Autumn, sunshine in, 240. Baldinus discovered phosphorescent bodies, 5. Barium, chloride of, a colorific agent, 63. sulphuret of, 271. Barley, malted and unmalted, 241. Bayard, M., on pictures produced with bromide of silver, 121. Beccaria, Father, on phosphori, 271. on magnetic power of light, 296. Bernard on the spectrum, 41. Berres, Dr., on fixing Daguerréotypes, 109. Berthollet and Biot report on Berard's experiments, 20. Berzelius, on the action of light on the salts of gold, 19. on magnetism by light, 298. Biot, M., on bromide of silver, 119. his polariscope employed in experiments on actinism, 335. on vision, 347. Bitumen of Judea, employed by Niepce, 31. in heliography, 189. Blackburn's theory of light, 20. Bleaching action of iodides, 96. power of spectrum, 98. Blue cobalt glass, absorptive power of, 327. Böckman on the action of spectrum on phosphorus, 15.1 Boetius de Boot on gems, 4 Boyle on the light of the planets, 7. on phosphori, 270. Brassica napus, growth of, 221. Brayley, Mr., lectures on Mr. Reade's process, 85. Brewster, Sir D., on the compound nature of light, 40. 20. Carbon, its existence in plants, 245. Carbonic acid, decomposed by plants, 15. 229. 242. Carbuncle self-luminous, 4. Cavendish, Mr., on air, 210. Cellini, Benvenuto, on the carbuncle, 4. glasses, absorptive power of, 306. Charles, M., supposed discovery of photography by, denied, 22. Cheiranthus cheiri, action of light on, 197. Chemical combination, influence of solar rays on, 276. properties of prismatic colours, Dr. Herschel's question on, 19. rays, by M. E. Becquérel, 384. rays absorbed, 355. spectra, after absorption by uranium glass, 314. spectra, after absorption by quinine, 319. spectra, after absorption by red glasses, 322. spectra, after absorption by green glasses, 325. spectra, after absorption by blue glasses, 328. spectrum, Berard's idea of, 21. dark lines of, 49. Chlorine liberated from chloride of silver darkening, 79. action of, on guaiacum gum, 191. and hydrogen, effect of light on, 276. Chlorophyl, on formation of, 235. Christie, Mr., on magnetic vibrations influenced by light, 297. Chromate of iron, 174. of mercury, 162. of silver, 132. Chromatype, the, 175. Chromic acid and iron, 285. Claudet combines chlorine and iodine, 104. on the Daguerréotype, 362. Cobalt, 183. Collodion, employed in the examination of the spectrum, 304. its preparation, 142. process, 87, 142. Colour the result of molecular arrangement, sulphate of, and bichromate of potash, 290. glasses, green, absorptive powers of, 324. Corchorus Japonica, action of light on, 194. Corrosive sublimate, curious action of, 112. Cyanogen compounds, 131. Electrical images, 265. influences of sunshine, 291. Electric sparks, phosphorogenic rays of, 47. Electro magnetic force, influence of, on light, 302. Englefield, Sir Henry, on the heat rays of the spectrum, 19. on thermic spectrum, 51. Engravings copied by thermography, 256. Epipolized light, 44. Etherial solutions of gold decomposed, 13. Faraday, on the volatilization of mercury,106. action of magnets on light, 299. Fat becomes yellow and rancid when exposed to light, 17. Ferrocyanide of potassium combined with Fischer, M., action of light on salts of gold observed by, 19. on ferrocyanides precipitated by alcohol, 187. Fishes, the depth to which they live in the ocean, 353. and Appendix. Fixing processes of Mr. Talbot, 68. of Sir John Herschel, 34. 69. Daguerréotype image, 108. Fizeau, M., on fixing Daguerréotype image, 109. on the dark radiations, 267. Flame, colours of, 340. Flowering of plants, 237. Flowers, coloured juices of, 192. Fluids, coloured, action of, on spectrum, 212. Fluorescence, 45. phenomena of, 316. Fluoride of silver, 123. Fluorotype, the, 124. Force, magnetic, a line of, explained, 300. Fraunhofer's measurement of prismatic rays, 38. lines, 48. Frankland on iodide of ethyl, 281. Gallic acid, used by Herschel and Talbot, 84. its action, 87. Galls, infusion of, employed by the Rev. J. B. Reade, 85. Gardner's, Dr., experiments on plants, 219. Gay Lussac and Thénard, on combination of chlorine and hydrogen 19. on chlorine and hydrogen, 277. Gems, the influence of light on, 4. Germination, observations on, 207. of seeds, 222 Glass, covered with films of chloride of silver, 77. coloured, use of, 211. yellow, employed in the analysis of spectrum, 305. red, absorptive power of, 321. smoke-coloured, absorptive power of, 332. Glass for Palm-House at Kew, 375. Glasses, coloured, used for analysis of solar rays, 303. blue, absorptive powers of, 327. Goddard, Mr., improves the Daguerréotype, 104. polariscope employed in experiments on actinism, 336. Gold solution, as a fixing agent, 109. photographic properties of, 146. protocyanide of, 150. percyanide of potassium and, 151. Green, vegetable matter, Priestley's experi ments on, 208. Herschel, Sir John, on the chrysotype, 163. on the cyanotype, 164. on chemical rays absorbed 355. Himly's Method of preparing salts of gold, Appendix, 371. Homberg on the sun's rays, 5. Horn silver, blackening observed by the alchemists, 5. Hulme, Dr., on animal phosphorescence, 274. Hydrogen, its existence in plants, 245. Hyposulphite of soda, used for fixing, 34. Hypothesis of Mr. E. Becquérel, 352. Image, invisible, developed on the Daguerréotype plate, 105. Ingenhousz on vegetation, 208. Instantaneous process announced by Daguerre, 110. Invisible light, Möser on, 248. and ferrocyanide of potas on metal plates, 102. iron, syrup of, 136. platinum, 156. mercury, 161. copper, 178. ethyl decomposed by light, 281. Iodides, bleaching action of, 96. Iodine employed by M. Niepce, 32. tincture of, in catalysotype, 136. latent light of, 255. Iodized paper, 83. collodion, 142. |