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      Knowledge is Power

      Scientific American March 06, 1920

      Wreck-Proof Safe for Ocean-Going Mail

      • By James Anderson on March 6, 1920

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      More in the March 06, 1920 issue of Scientific American
      • Inventions New and Interesting - March 6, 1920
      • Vermont Talc
      • A Year's Supply of Raw Material for the Melting Pot, Wartime Bureaus and the Taxpayer and more
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