A Manual Of Photography

 INDEX. 318 Herschel produces a naturally coloured spectrum, 172. _______Sir William, on the calorific rays, 5. Hill, Mr., announces natural colours, 174. History of Photography, Part 1, 1. Honey used with albumen, 28^. Horne, Mr., on collodion process, 261. Howell's, Mr., etchings on glass, 284. Hungarian liquid, 242 Hydriodates employed as bleaching agents, 89. Hydriodic acid, to prepare, 291. _______salts for producing positives, 288. Hyposulphite of soda, 213. Image, collodion, to develop, 26a. Images produced by juxta-position, 168. produced by yellow rays, 145. Improvements in daguerreotype, 44. Indices of refraction, 178. Instantaneous process of Mr. lalbot, 32. . ... Instruments for measuring actimc force, 157. . . Interference of light and actinism, 1-• Invisible photographs, 217._ Iodide of potassium as a fixing agent, 213. . of silver, 131, 209. Iodine, discovery of, its use, , _______its influence in giving sensibi- lity to various substances, 91. Iodised collodion, 261. . _____paper, to prepare, 27. Iodising silver plate, 38. - -----the paper, 218. Iron, ammonio-citrate of, a photo- graphie agent, 53. , hydriodide of, 291. protosulphate of, use of, 78. salts, use of, as photographie agents, 56. , sulphate and muriate of, 289. , syrup of loduret of, 79. Jordan, Mr. T. B,. on photographic registration, 153. Jugglers of India, supposed acquaint- ance with chemical action of fig, Knight’s, Mr., instrument for deter- mining correct focus, 163. Kratochwila, Mr. K., on fixing process, 252. Lace, paper for copying, 209. Labillardière on development of pores in plants, 6. Langenheim, Messrs., hyalotypes, 283. Landscapes, to copy, 299. Lassaigne, M., on hydriodic photo- graphs, 296. Lead, nitrate and acetate of, 289. _ , oxide of, changes in sun- shine, 5. —------, used as a mordaunt, 127. Le Gray on albumen, 276. on albuminised paper, 284. ------- on fixing, 214. ------------on the calotype, 228. ------introduces waxed paper, 103. ______on the waxed paper process, 231. Legs for camera obscura, 204. Lenses for the photographie camera, 177, 299. ------, shapes of, 179. Lerebours on lenses, lol. Life, portraits from, 301. Light, colours of, 117. —, its destructive action, 293. Lime witli chlorine, iodine, and bro- mine, 245. Luminous power, 121. Luna cornua observed by Scheele to darken by violet rays, 4. Magnetism of violet rays, 5.. Malaguti, M., on the permeation of chemical rays, 123. Malone, Mr., his process with albu- men, 278. on the use of glass and por- celain, 29. Manipulation, modes of, 205. Manganese, hydriodate of, 291. Martin, M., on the calotype process, 226. on collodion process, 269. Mathiola annua, photographic changes of, 67.„ Mayall's, Mr., process with albumen, 281.