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      Knowledge is Power

      Scientific American December 10, 1904

      The Use of Electricity in Driving Coal-Conveying Machinery

      • By Frank C. Perkins on December 10, 1904

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      More in the December 10, 1904 issue of Scientific American
      • Business and Personal Wants
      • Meteorological Observatories at Sea
      • Radio-Active Minerals
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