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      Knowledge is Power

      Scientific American May 21, 1892

      The Evolution of Commerce

      Annual Address by the President

      • By Gardiner G. Hubbard on May 21, 1892

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      More in the May 21, 1892 issue of Scientific American
      • Analysis of Snow
      • Grafting on Grape Vines
      • Osmosis, and its Relation to Plant Life
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