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Phelps Dodge refining company, El Paso, Texas. Charging sheets of copper, produced by electrolysis, into a reverbatory furnace
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El Paso, Texas. Phelps Dodge refinng company. Working at the electrolytic tanks in which sheets of pure copper are formed
El Paso, Texas, Phelps Dodge refining company. Electrolytic tanks in which sheets of pure copper are formed. The sheets are later melted and cast into ingots
El Paso, Texas, Phelps Dodge refining company. Electrolytic tanks in which sheets of pure copper are formed. The sheets are later melted and cast into ingots