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Production. Copper (refining). Casting house in a large copper refining operation. Here sheets of pure copper, formed by electrolysis, are 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). Casting house in a large copper refining operation. Here sheets of pure copper, formed by electrolysis, are 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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