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      Scientific American May 24, 1919

      Inventions New and Interesting - May 24, 1919

      A Department Devoted to Pioneer Work in the Arts

      • May 24, 1919

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      More in the May 24, 1919 issue of Scientific American
      • Recently Patented Inventions - May 24, 1919
      • A Megaphone of Novel Design
      • Making Over the Disabled Doughboy
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