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      Knowledge is Power

      Scientific American March 20, 1920

      The Service of the Chemist

      A Department Devoted to Progress in the Field of Applied Chemistry

      • By H. E. Howe on March 20, 1920

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      More in the March 20, 1920 issue of Scientific American
      • Finger Signals for the Motorist, Breaking Away from the Conventional in Mail Airplanes and more
      • Strange Things to Eat
      • Iron Castings from Steel Scrap, Using Brick and Wood in Reinforced Concrete and more
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