Snelling, Henry Hunt, 1816-1897 · [New York : W.B. Smith] · leaf 272
tcolor it is useless, and the whole processmust be again gone through. From description, this operation may ap-pear very difficult; but with a little practicethe precise interval necessary to producethe best effect is pretty easily guessed at.When the proper yellow color is produced,the plate must… … 34 on the plate ; and fig. 35, with the dooraopened by the half circles, a a. d d, are
Photography · Art and photography
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