The Fire Assay of Gold, Silver, and Lead in Ores and Metallurgical Products

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Mining and Scientific Press, 1907 - Assaying - 88 pages
 

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Page 82 - The solution is allowed to stand in a warm place until the red fumes...
Page 82 - The solution is well stirred, and 10 cc of a 10% solution of lead acetate added and, still stirring, 2 cc of sulphuric acid (1 part acid to I part water), after which it is allowed to stand until settled.

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