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      Knowledge is Power

      Scientific American April 23, 1870

      Improved Packing Steam Drying Cylinders on Paper Machines

      • April 23, 1870

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      More in the April 23, 1870 issue of Scientific American
      • Business and Personal- April 23, 1870
      • Recent American and Foreign Patents- April 23, 1870
      • The Paris Observatory
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