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      Knowledge is Power

      Scientific American September 07, 1907

      Completion of the Scientific American Trophy for Heavier-Than-Air Flying Machines

      • September 7, 1907

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      More in the September 07, 1907 issue of Scientific American
      • Modern Experimental Psychology--Its Methods and Apparatus
      • Recently Patented Inventions
      • Moving the Montauk Theater
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