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      Scientific American April 10, 1909

      The Shrinking of the Earth's Crust

      What is Happening to this Planet

      • By M. Eiden on April 10, 1909

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      More in the April 10, 1909 issue of Scientific American
      • A New Two-Cycle Motor
      • Edison's Inventions.—II
      • History of the Whale Industry
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