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      Knowledge is Power

      Scientific American August 04, 1917

      Inventions New and Interesting- August 4, 1917

      A Department Devoted to Pioneer Work inthe Arts

      • By Frank C. Perkins on August 4, 1917

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      More in the August 04, 1917 issue of Scientific American
      • Mechanics and Mathematics of the Draft
      • Automobile- August 4, 1917
      • Notes and Queries- August 4, 1917
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