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      Digital & 4-Year Archive

      Scientific American June 05, 1915

      Patents and their Purpose

      Notes of Historic Interest

      • By Jeremiah Lee MacAuliffe on June 5, 1915

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      More in the June 05, 1915 issue of Scientific American
      • British Shipping Tonnage
      • The Value of Birds to Man
      • Development in Electromagnetism—II
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