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      Scientific American March 09, 1912

      The Purity of Natural Waters—II

      The Influence of Aquatic Organisms, of Domestic Sewage, and Industrial Waste

      • By Maximilian Marsson on March 9, 1912

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      More in the March 09, 1912 issue of Scientific American
      • Herman Frasch
      • Recent Proǵress in Spectroscopic Methods—I
      • The Resistance of the Air and Aviation
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