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      Knowledge is Power

      Scientific American June 03, 1916

      A Census of Colors

      What the Government is Doing to Aid the Dyestuff Industry

      • By Thomas H. Norton on June 3, 1916

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      More in the June 03, 1916 issue of Scientific American
      • A University to Order
      • Our Present and Future Sources of Vegetable Tannins
      • The Technically Trained Foreman
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