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      Knowledge is Power

      Scientific American November 09, 1918

      The Principal Bridges of the World—II

      A Comparison of their Size, Importance and Principles of Design

      • November 9, 1918

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      More in the November 09, 1918 issue of Scientific American
      • A Study of Dogs as Carriers and Draught Animals
      • Experiments on the Manifestation of Osmotic Pressure with Membranes of Chemically Inert Materials
      • Quassia Extract as a Contact Insecticide
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