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      Knowledge is Power

      Scientific American September 1922

      Down Through the Ages

      Intimate Glimpses of Animals Which Have Survived from Prehistoric Times

      • By William Crowder on September 1, 1922

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      More in the September 1922 issue of Scientific American
      • An Automatic Hand on the Throttle
      • Concrete-and-Steel Stadium Construction in France, The Window-Cleaning Carriage
      • Electrically Harnessing the Winds
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