Public domain
Great Falls, Montana. Electrolytic copper refinery of Anaconda Copper Mining Company. Smoothing a copper blank before it is lightly greased; this copper blank will then be placed in an electrolytic tank; a deposit of copper will form which will make the starting sheet which will then be stripped fro
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Credit lineGreat Falls, Montana. Electrolytic copper refinery of Anaconda Copper Mining Company. Smoothing a copper blank before it is lightly greased; this copper blank will then be placed in an electrolytic ta. 1942-01-01. Lee, Russell. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.