Snelling, Henry Hunt, 1816-1897 · [New York : W.B. Smith] · leaf 272
34 on the plate ; and fig. 35, with the dooraopened by the half circles, a a. d d, are … 35 stops by which the doors are fastened untilthe moment when the plate is required foruse. The third operation should, if pos-sible, immediately succeed the second :the longest interval between them should 2<54 The Photographic Art-Journal. November, not exceed an hour, as the iodine and…
Photography · Art and photography
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