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      Knowledge is Power

      Scientific American May 1920

      What Europe is Doing in Aviation--Americans, Please Take Notice!

      • By Erie A. Dime on May 1, 1920

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      More in the May 1920 issue of Scientific American
      • Air Bags for the Airplane that Lands on Water
      • Correspondence - May 1, 1920
      • Keeping the Construction Laborer Satisfied
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