Humphrey's Journal
1858; Gale Group; Linguagem: English
Autores
L. E. Whaite, M. Leon De Cassagne, Mr. G. Dawson, Mr. Wm. Keith,
ResumoFrontmatter: Humphrey's Journal. Essay: On Coloring the Backgrounds of Collodion Positives, On the Glass Room.—By Mr. Wm. Keith, Mode of Transferring a Collodion Negative from Glass to a Sheet of Gutta Percha, Employed at the Imperial Printing-Office of Vienna [Described, by M. Leon De Cassagne, at a Meeting of the French Phot. Soc.], General Remarks on Negative Printing, The Exposure to Light Required for Collodion Positives, The Waxed Paper Process.—By Mr. G. Dawson. Letter to the editor: On a Method of Reversing the Action of Light on the Collodion Film, and Thereby Producing Transparent Positives, at One Operation, in the Camera, On Taking Instantaneous Pictures.
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