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      Scientific American March 23, 1907

      The Castelin Automobile Plow

      The Paris Correspondent of Scientific American

      • March 23, 1907

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      More in the March 23, 1907 issue of Scientific American
      • Hybridization of the Oaks
      • The Recent Determination of the Figure and Size of the Earth from Measurements in the United States
      • Indirect Methods in Astronomy
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