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      Knowledge is Power

      Scientific American August 03, 1912

      The Electric Smelting of Zinc Ore

      • By W. R. Ingalls on August 3, 1912

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      More in the August 03, 1912 issue of Scientific American
      • Experiments on Durability of Tool Steel
      • The Manufacture of Porcelain Insulators
      • Forcing Plants by Means of Radium
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