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      Scientific American March 14, 1914

      Practical Processes for Producing the Best Permanent Magnets, A Cataleptic Insect

      • By Silvanus P. Thompson on March 14, 1914

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      More in the March 14, 1914 issue of Scientific American
      • A Volcano in Being
      • The Civilization of the Hittites of Syria
      • All Torpedoes!
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