Paris: Gauthier-Villars et Fils, 1888. Third edition. 12mo., 106 pp., scattered foxing to text and foredge. Quarter morroco titled and decorated in gilt and marbled paper over boards. The top, bottom and foredge of the binding is rubbed and slightly chipped. Very good. Item #53641
Roosens and Salu No. 8294, listing only this third edition, possibly snce the author published 2 other texts of other photomechanical processes.