Paris: Gauthiers-Villars, 1911. First edition. Small 8vo., viii, 111 pp., a few text illustrations. Publisher's printed paper wrappers, which are lacking a few small chips at the spine ends, and a few creases to wrappers. A very good unopened copy. Item #26990
A review and manual for the autochrome process. Roosens and Salu no. 569.