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      Knowledge is Power

      Scientific American July 13, 1918

      "Unsinkable" Cargo Ships, Something for Nothing, and more

      • July 13, 1918

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      More in the July 13, 1918 issue of Scientific American
      • Loss of Blood Treated by the Serum Method, Paper Clothing
      • Shadows Cast During a Partial Eclipse, Notice to Our Subscribers
      • The Current Supplement- July 13, 1918
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