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      Knowledge is Power

      Scientific American January 25, 1919

      Curved or "S" Courses

      A Protection Against Torpedo and Gunfire

      • January 25, 1919

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      More in the January 25, 1919 issue of Scientific American
      • Port and Harbor Facilities, Electric Waves From Ocean Tides and more
      • Weighing the Temperature for Blind Folk, A Stretcher that Gives up its Load Painlessly
      • Submarine Range-Finding by Means of Reflected Sound Waves
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