Snelling, Henry Hunt, 1816-1897 · [New York : W.B. Smith] · leaf 182
t is necessaryoccasionally to add a small quantity, oneor two ounces; this must however be de-termined by the appearance of the plate. When there is not enough cyanide, theplate will have a cold deep blue appearance,and if there is an excess of cyanide theplate will appear while or milky, and… … REPORT on the Ar-rangements and Charac-ter of French Art-Col-lections, and System ofInstruction in Schools ofDesign in France, pre-pared by R. N. Wor-num, Esq., Librarian, and Keeperof the Ornamental Casts of theDepartment of Practical Art,has been submitted by him to thesuperintendents. FRENCH…
Photography · Art and photography
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