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Phelps Dodge refining company, El Paso, Texas. Firing the furnace in the copper plant
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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
Phelps Dodge refining company, El Paso, Texas. Charging sheets of copper, produced by electrolysis, into a reverbatory furnace
Phelps Dodge refining company, El Paso, Texas. Charging sheets of copper, produced by electrolysis, into a reverbatory furnace