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      Knowledge is Power

      Scientific American May 26, 1917

      Submersible Freighter Versus the Submarine, United States Patents Owned by Germans, and more

      • May 26, 1917

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      More in the May 26, 1917 issue of Scientific American
      • Correspondence- May 26, 1917
      • Recently Patented Inventions- May 26, 1917
      • India's War Flower
      View Full Contents
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