Paris: Gauthier-Villars et Fils, 1894. First edition. Small 8vo., vii, 48  pp. Printed paper wrappers. Lower portion of the front wrapper is scuffed and abraded, with scuff at the upper corners, and a small chip lacking from the rear wrapper. Text is fine and bright. Blind stamp on the half-title page reads "HOMAGE." Item #26991
A report and manual on the advancements of photolithography using zinc plates.
Roosens and Salu No. 8235.