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      Scientific American July 28, 1917

      Inventions New and Interesting- July 28, 1917

      A Department Devoted to Pioneer Work in the Arts

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      More in the July 28, 1917 issue of Scientific American
      • Science- July 28, 1917
      • Playing the German Game, The Shipping Board Scandal, and more
      • Invention- July 28, 1917
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