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Wilhelm Kaufmann
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Improvements in a Process and Apparatus for the Electrolytic Production of Metallic Zinc and Metallic Copper from Zinc Ores Containing Copper, and Oxygen Gas as a Bye-product.
Improvements in a Process and Apparatus for the Electrolytic Production of Metallic Zinc from Ores of Zinc and Metallic Zinc, and Metallic Copper from Zinc Ores containing Copper, and the Production of Oxygen Gas in the Cases specified.