Mees, C. E. Kenneth (Charles Edward Kenneth), 1882-1960, Eastman Kodak Company · Rochester, N.Y. : Eastman Kodak Company · leaf 13
THE BEGINNINGS OF PHOTOGRAPHY the day is wanting to render this process as useful as it is elegant." This much needed method, however, remained wanting from 1802 until 1839, when Sir John Herschel found that … Fig. 2. Crystals of Thiosulphate of Soda or "Hypo". "hypo", which he had himself discovered in 1819, could dis- solve away the unaltered chloride of silver and enable him to "fix" the picture, as the process has been called ever since Herschel made the discovery, and from that time to this hypo has…
Photography
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
