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      Knowledge is Power

      Scientific American February 27, 1915

      An Electric Shriek to Warn Mariners

      • By Our Paris Correspondent on February 27, 1915

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      More in the February 27, 1915 issue of Scientific American
      • Equipping the Automobile for Travel, The Current Supplement and more
      • The Great International Panama-Pacific Exposition
      • The Largest Spider Web in the World
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