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      Knowledge is Power

      Scientific American August 20, 1904

      Mammoth Dredger Used for Reclamation Work in California

      • By William A. Lawson on August 20, 1904

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      More in the August 20, 1904 issue of Scientific American
      • Electricity in Agriculture
      • Notes and Queries - August 20, 1904
      • The Iguana
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