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      Knowledge is Power

      Scientific American July 24, 1915

      The Bureau of Invention and Development, Governmental Indifference to Invention and more

      • July 24, 1915

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      More in the July 24, 1915 issue of Scientific American
      • Strategic Moves of the War--July 14th, 1915
      • Inventions New and Interesting - July 24, 1915
      • What Amount of Water Should be Used in Concrete Mixtures, Digging Battlefield Trenches by Machine and more
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