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      Scientific American April 1922

      The Service of the Chemist, April 1922

      A Department Devoted to Progress and Achievement in the Field of Applied Chemistry

      • By Ismar Ginsberg

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      More in the April 1922 issue of Scientific American
      • A Drill for the Tree-Dentist, Auto-Bus Stability, and more
      • At the Sending End of Radio
      • Curbing the Colorado
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