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Production. Copper (refining). Sheets of copper produced by electrolysis at a large refining operation. These will be melted and cast into ingots. Large amounts of copper are produced for the war effort at the El Paso, Texas plant of Phelps-Dodge Refining Company. Sourced from the Library of Congress.
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Production. Copper (refining). Sheets of copper produced by electrolysis at a large refining operation. These will be melted and cast into ingots. Large amounts of copper are produced for the war effort at the El Paso, Texas plant of Phelps-Dodge Refining Company. Sourced from the Library of Congress.

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Production. Copper (refining). Sheets of copper produced by electrolysis at a large refining operation. These will be melted and cast into ingots. Large amounts of copper are produced for the war effort at the El Paso, Texas plant of Phelps-Dodge Refining Company. Sourced from the Library of Congress.

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