Text engl. - Image part is a reprint of an undated album titled: "Photographs of the Columbia River and Oregon. By C. E. Watkins, Nos. 22 and 26 Montgomery Street, San Francisco".
On storage and handling of photography related materials in the darkroom and studio, general and specific hazards of these materials; also on processes in black and white and color photography, and on historical silver-, non-silver and printmaking processes.