Talbot, Mr., his discoveries, 9; theory of Calotype process, 176. Taupenot, M., his Collodio-Albumen process, 181; practical details of, 294. Temperature, its effect upon development of Collodion film, 102; upon fogging, 105; upon keeping Collodion, 210; upon action of fixing Bath for paper Positives, 130; upon Hypo toning Bath, 136. Test-papers, use of, 376. Toning Bath for Positives, with Sel d'or, 134, 267; with Hyposulphite and Gold, _see_ Fixing and Toning Bath; with Chloride of Iron and Hyposulphite, 160. Toning of Positives, term defined, 121; may injure the stability of the proof, 154; points to be kept in view to avoid fading, 167; manipulatory details of, 253; by Sel d'or, 267. Transparencies, mode of printing, 273. Varnishes for Collodion Photographs, 226. View Lenses, directions for using, 230. Vocabulary of Photographic chemicals, 327. Washing Positive prints, rules for, 162; details of, 255. Waxed paper process, theory of, 178. Weights and Measures, table of, 379. PRINTED BY JOHN EDWARD TAYLOR, LITTLE QUEEN STREET, LINCOLN'S INN FIELDS. * * * * * Transcriber Note Minor typos have been corrected. Images moved to prevent splitting paragraphs. End of the Project Gutenberg EBook of A Manual of Photographic Chemistry: Including the Practice of the Collo, by T. Frederick Hardwich