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 84
Fig. 16. Fig. 17. £ s.d. 0 7 6 Head Rests, best portable 1 10 0 Willats’ Improved Johnstone’s Head Rest … Fig. 18. Boxes of various sizes for holding glass plates, price according to finish.
Photography · Collodion process
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
