Paris: Bureau D'Abonnement et de Vente a la Librairie Auguste Goin, 1869. First edition. 7 issues, 8vo., varying paginations; stitched into printed self wrappers and untrimmed as issued. One issue has a triangular tear to the last 5 leaves with no loss of text. The various issues are very good to fine. Item #51919

In this contiguous group of weekly issues, 19 June 1869 to 31 July 1869, Charles Cros and Louis Ducos du Hauron, alternate publishing letters in defense of their individual claim of priority of the discovery of the three-color photographic process. A lengthy and substantive dialogue, which closely followed the publication of: Cros, Charles. SOLUTION GÉNÉRALE DU PROBLÈM DE LA PHOTOGRAPHIE DES COULEURS. Paris: Gauthiers-Villars et au Bureau du Journal Les Mondes, 1869, and preceeded the publication of: Ducos du Hauron, Louis. LES COULEURS EN PHOTOGRAPHIE ET EN PARTICULAR L'HÉLIOCHROMIE AU CHARBON. Paris: A. Marion, Janvier 1870, by several months.

Scarce, with but a few holdings in the United States.

Price: $1,500.00