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      Knowledge is Power

      Scientific American September 1926

      Novel Devices for the Shop and the Home, September 1926

      A Department Devoted to Recently Invented Mechanical and Household Appliances

      • By Albert A. Hopkins on September 1, 1926

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      More in the September 1926 issue of Scientific American
      • A Zeppelin Express Cruiser
      • Fingerprints as Identification Marks in Ancient Greece-a Brief for Early Trade-marks
      • In the Editor's Mail, September 1926
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