Public domain
Conversion. Copper and brass processing. Analyzing the amount of copper and lead in the brasses. In this test the laboratory checks samples of brass from the mill's production to make sure they are the correct mixture. Samples are dissolved in acid and subsequently electrolyzed. The copper is plated
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Credit lineConversion. Copper and brass processing. Analyzing the amount of copper and lead in the brasses. In this test the laboratory checks samples of brass from the mill's production to make sure they are th. 1942-01-01. Palmer, Alfred T., United States. Office For Emergency Management. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
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