Public domain
Great Falls, Montana. Electrolytic refinery of Anaconda Copper Mining Company. Inspecting the electrolytic process. By means of this tool which is thrust down and towards the inspector he is able to determine if deposition of copper is proceeding at the normal rate and if there are any short circuit
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Credit lineGreat Falls, Montana. Electrolytic refinery of Anaconda Copper Mining Company. Inspecting the electrolytic process. By means of this tool which is thrust down and towards the inspector he is able to d. 1942-01-01. Lee, Russell. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
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