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      Knowledge is Power

      Scientific American July 1922

      When the Hand on the Throttle Fails

      The Construction and Operation of the Webb Automatic Train-Stop System

      • By Robert G. Skerrett on July 1, 1922

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      More in the July 1922 issue of Scientific American
      • Catching the Cinders, Measuring the Heat from the Stars
      • Dr. Nimführ's Soaring Airplane, Sandy Ice Cream
      • Inventions New and Interesting, July 1922
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