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      Scientific American July 14, 1888

      The National System of Purifying Water by Filtration, Precipitation, and Aeration

      • July 14, 1888

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      More in the July 14, 1888 issue of Scientific American
      • A Clamp for Holding Covers on Fruit Cans
      • An Improved Drilling Tool
      • Engineering Inventions - July 14, 1888
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