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      Knowledge is Power

      Scientific American September 24, 1921

      Saving Food Fish by the Hundred Million

      How Victims of the Mississippi Overflow Are Returned to the Main Channel

      • By George H. Dacy on September 24, 1921

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      More in the September 24, 1921 issue of Scientific American
      • Is Airship Travel Profitable?, The Divining Rod and more
      • A. Bridge Building Record
      • Keeping the Railroads Afloat
      View Full Contents
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