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      Knowledge is Power

      Scientific American April 06, 1889

      Notes and Queries- April 6, 1889

      Hints to Correspondents

      • April 6, 1889

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      More in the April 06, 1889 issue of Scientific American
      • An Improved Fertilizer Distributer
      • Business and Personal- April 6, 1889
      • To Inventors- April 6, 1889
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