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‎Recherches photographiques.‎

‎(Paris, Bachelier), 1849. 4to. Without wrappers. In ""Comptes rendus hebdomadaires des séances de l’Académie des sciences"", Vol. 29, No 8. Pp. (193-) 224. (Entire issue offered). Blanquart-Evrard's paper: pp. 215-217.‎

‎First printing of an importent paper in the history of photography in which "" Blanquart-Evrard described, in 1849 (the paper offered), a process very similar to that of Niepce de Saint-Victor (his glass pictures or ""Niepceotypes""), with minor changes, and called attention to the fact that the silver-iodized albumen could be used either moist or dry.""(Eder p. 339).""In the field of photography we are indepted to Blanquart-Evrard for many improvements,in particular for having introduced the developing process of iodide bromide (or silver chloride) paper by gallic acid as a rapid printing process for producing large editions of silver prints.""(Eder).‎