The practical printer : a complete manual of photographic printing (1874)
Hearn, Charles W · Philadelphia : Benerman & Wilson · leaf 43
33 FUMING THE PAPER. “The cut below represents a box which I offer to the fraternity. As I do not intend to patent it, I will feel sufficiently repaid if I hear of any adopting it in their establishments. “I claim as an improvement an entirely novel method of causing fig. 10. … a perfect and even distribution of the ammonia fumes upon all parts of a sheet ; so that, if properly silvered, the sheet will give a perfect aud even print. “We have, in Mr. Moore’s establishment, used for nine years a box which conveyed the fumes from the space in the bottom through holes into…
Photography -- Printing processes · Photographs on porcelain
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
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