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      Knowledge is Power

      Scientific American April 1925

      Our Point of View, April 1925

      Battleship Annihilators; Lowering the Great Lakes Level; What Is Wrong With the Barge Canal?

      • April 1, 1925

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      More in the April 1925 issue of Scientific American
      • Recently Patented Inventions, April 1925
      • The Krupp Turbine Locomotive
      • The Unusual Occupation of Inlaying Prints
      View Full Contents
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