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      Knowledge is Power

      Scientific American March 25, 1893

      The Duality of the Mind

      • By Benjamin Ward Richardson on March 25, 1893

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      More in the March 25, 1893 issue of Scientific American
      • Change in the Character of a Mineral Water
      • Mr. Pasteur's Birthday Anniversary
      • The Chemical Technology of Drying Oils, Oil Boiling, and Bleaching
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