Materia Photographica: A Treatise On The Manufacture, Properties, And Uses Of The Substances Employed In Photography (1891) is a comprehensive guide written by Clement J. Leaper on the various substances used in photography. The book covers the manufacturing process, properties, and uses of these substances, including silver nitrate, collodion, gelatin, and various photographic papers. The author provides detailed information on the chemical reactions involved in photography, as well as practical advice on how to use these substances to produce high-quality photographs. The book is an essential resource for anyone interested in the history and science of photography, as well as for professional photographers and scientists working in the field. Overall, Materia Photographica is a valuable and informative guide that offers a wealth of information on the materials used in photography.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions, that are true to their original work.