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      Scientific American October 23, 1920

      The Service of the Chemist

      A Department Devoted to Progress in the Field of Applied Chemistry

      • By H. E. Howe on October 23, 1920

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      More in the October 23, 1920 issue of Scientific American
      • A Mechanical Age for the Farm
      • Piloting the Ship with the Ears, Rust Preventives
      • Correspondence
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