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      Knowledge is Power

      Scientific American October 18, 1919

      Ironing Out a River Bottom

      A Pneumatic Caisson Contract That Brought Up Some Unusual Problems.

      • By J. F. Springer on October 18, 1919

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      More in the October 18, 1919 issue of Scientific American
      • Christmas Made in America
      • New Books, Etc. - October 18, 1919
      • World Markets for American Manufactures
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