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      Knowledge is Power

      Scientific American March 30, 1918

      A New Gas for Welding and Cutting, The Highest Possible Explosives

      • March 30, 1918

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      More in the March 30, 1918 issue of Scientific American
      • Mechanical Equipment of the Farm- March 30, 1918
      • The Current Supplement- March 30, 1918
      • The Heavens in April, 1918
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