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      Knowledge is Power

      Scientific American September 1924

      Super-Streets and Subways Tentative Details of a Traffic Plan Recommended for New York City

      • September 1, 1924

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      More in the September 1924 issue of Scientific American
      • Acoustics and Plaster, A New Principle in Concrete Work
      • Giant Submarines
      • Our Abrams Verdict
      View Full Contents
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