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      Knowledge is Power

      Scientific American April 27, 1918

      Present Day Problems of Plant Geography—II

      As Related to the Necessity for Intensified Production

      • By Jean Dufrenoy on April 27, 1918

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      More in the April 27, 1918 issue of Scientific American
      • Alcohol as a Fuel for Internal Combustion Motors
      • Hydro-Electric Development
      • Scotland and the Scotch
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