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      Scientific American April 10, 1909

      Edison's Inventions.—II

      Their Commercial Value to the World

      • By Frank L. Dyer, T. Commerford Martin on April 10, 1909

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      More in the April 10, 1909 issue of Scientific American
      • A New Two-Cycle Motor
      • History of the Whale Industry
      • Propeller Molding
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