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      Knowledge is Power

      Scientific American June 20, 1914

      The Super-dreadnought Queen Elizabeth

      The First Battleship to Mount 15-inch Guns

      • By Oscar Parkes on June 20, 1914

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      More in the June 20, 1914 issue of Scientific American
      • Forty-five Years of Air-brake Evolution
      • New Books, Etc.- June 20, 1914
      • Psychophysical Tests for Falsehood, The Hawaiian Volcano Observatory, and more
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