Paris: Gauthiers-Villars et Fils, 1893. First edition. 12mo., ix, 82 pp., formulaic illustrations. Printed paper wrappers which are dust soiled and have a single crease on the rear. A very good and unopened copy. Blind-stamped "Hommage" on the half-title page. Item #26533
A detailed manual written by the Lumière brothers on the use of organic substances as a photographic developer, specifically paramidophenol, commonly known as Rodinal. This was among their most important contributions to the field of photographic chemistry. Ten years later they introduced Autochrome color plates, the first commercially available color process.
Roosens and Salu No. 3060.