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      Scientific American March 23, 1912

      Fire Extinction by Frothy Mixtures

      A Record of Some Very Successful Trials of the New Method

      • March 23, 1912

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      More in the March 23, 1912 issue of Scientific American
      • Cooling Deep Mine Shafts
      • The Bernina Railway
      • A Combined Finder, Level and Telemeter
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