Plain directions for obtaining photographic pictures upon waxed and albumenised paper and glass, by collodion and albumen : including a third edition of Le Gray's Treatise on photography, a description of the stereoscope and the manner of taking pictures suited for it : also, the process for copying microscopic objects, &c. (1852)
Heisch, Charles, editor, Le Gray, Gustave, 1820-1884. Nouveau traité théorique et pratique de photographie sur papier et sur verre. English · London : T. Willats · leaf 78
76 Ditto ditto with Achromatic lens, sliding adjustment to take pictures 6 by 7 in. . . . £5 & 6 0 0 Ditto ditto with Achromatic lens to take pictures 5 by 4 in. 2 10 0 … Fig. 2. Improved Shifting Back Camera, with best double combination Achromatic lenses and diaphragms, to take Pictures 8J by 6| in. . . £14 14s. & 18 18 0 Ditto ditto to take 6J by 4f in, . 10 10 & 12 12 0 Ditto ditto to take pictures 4 by 3 in. . . . 5 15 0 Photographic Camera, with brass sliding…
Photography · Collodion process
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.