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      Knowledge is Power

      Scientific American September 14, 1889

      An Improved Blow-Off Cock and Fire Extinguisher

      • September 14, 1889

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      More in the September 14, 1889 issue of Scientific American
      • An Improved Oil Can
      • Index of Inventions- September 14, 1889
      • Rheostat and Resistance Column
      View Full Contents
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