Art of photography : instructions in the art of producing photographic pictures in any color and on any material, for the use of beginners and also of persons who have already attained some proficiency in the art, and of engravers on copper, stone, wood, etc. (1854)
Halleur, G. C. Hermann, Schubert, F. (Franz) · London : J. Weale · leaf 91
th it, w^hilst the potassium combines with a portion of the liberated oxygen of the water, forming potassa, which again combines with the hydrochloric acid to hydrochlorate of potassa ; the liberated silver of the chloride combines wdth the other portion of the oxygen to oxide of silver. The… … add a few drops of solution of nitrate of silver to the water, when
Photography
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
