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      Knowledge is Power

      Scientific American July 1923

      Draining Land With Gasoline

      How the Scarcity of Labor has Brought About the Use of Machinery for Marshland Ditching

      • By S. R. Winters on July 1, 1923

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      More in the July 1923 issue of Scientific American
      • Civil Engineering Notes, July 1923
      • Fighting the Mosquito
      • Mechanical Engineering Notes, July 1923
      View Full Contents
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