A Manual Of Photography

CHAPTER IX. GENERAL SUMMARY OF THE HISTORY OF PHOTOGRAPHY. It is thought that it may prove of some interest to append the following table, compiled with much care for the British Asso- ciation, by the author, and printed by that body in their Reports for 1850, and to which now numerous additions are made. It is believed that the dates of discovery are accurately given, the date of publication being, of course, in al1 cases, taken where there was the slightest doubt. Silver. Nitrate of -----(photographically employed) -----with organic matter . . . -----with salts of lead . . . . Chloride of ...................... -----(photographically employed) -----darkened, and hydriodic salts Iodide of (photographically used) -----with ferrocyanate of potash -----with gallic acid (Calotype) . -----with protosulphate of iron (Ferrotype)....................... -----with iodide of iron (Catalyso- . type) .......................... Bromide of ....................... Fluoride of....................... Ritter .... 1801 Wedgwood & Davy 1802 J. F. Herschel. . 1839 J. F. Herschel . . 1839 C. W. Scheele . . 1777 Wedgwood . . . 1802 Talbot . . . . 1839 Fyfe, Lassaigne . 1839 Herschel . . . 1840 Ryan ...........1840 Hunt ...........1841 Talbot .... 1841 Hunt . . . . 1844 Woods .... 1844 Bayard .... 1840 Channing . . . 1842 Fluorotype ................... Oxide of...................... Hunt . . . . 1844 ----with ammonia . . . Davy.. Uncertain. Phosphate of ...............Fyfe . . Tartrate — Urate — Oxalate—Bo- rate, Le....................Herschel . 1803 . 1839 . 1840