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      Knowledge is Power

      Scientific American April 1924

      Inventions New and Interesting, April 1924

      A Department Devoted to Pioneer Work in the Various Arts and to Patent News

      • April 1, 1924

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      More in the April 1924 issue of Scientific American
      • Bombing the Battleship
      • Does Steel Melt from the Inside?, Storing Gasoline Under Pressure and more
      • Man-Made Lumber
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