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      Scientific American June 20, 1914

      Filtration of Potable Waters

      The Paterson Rapid System for Large Scale Operation

      • June 20, 1914

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      More in the June 20, 1914 issue of Scientific American
      • The Use of the Pitot Tube
      • How Bodies Fall in Deep Vertical Shafts
      • Theories of Ore-Genesis
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