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      Scientific American October 11, 1919

      Filming a Lens in Action, Russia's Industrial Standing and more

      • By Carl F. Propson on October 11, 1919

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      More in the October 11, 1919 issue of Scientific American
      • Coal and Iron from the Arctic
      • Inventions New and Interesting - October 11, 1919
      • Correspondence - October 11, 1919
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