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      Knowledge is Power

      Scientific American December 19, 1914

      Recently Patented Inventions- December 19, 1914

      • December 19, 1914

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      More in the December 19, 1914 issue of Scientific American
      • Strategic Moves of the War- December 11, 1914
      • Looping the Loop in the Alps
      • Letters from the Firing Line - The Care of the Wounded - December 19, 1914
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