Investigations On the Theory of the Photographic Process

"Reprinted, in part, from the publications of the Royal Society, the Chemical Society, and the Royal Photographic Society." cf. Pref "In accordance with the regulations of the University of London, these researches have been accepted as theses, the earlier portions for the degree of bachelors of science by research, the later for the degree of doctor of science."-- Pref pt. I. Introductory.--pt. II. The physical chemistry of exposure, development and fixation.--pt. III. The sensitometry of photo