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      Knowledge is Power

      Scientific American August 23, 1919

      Piercing the Mountain Barrier Between France and Spain

      Two Difficult Pieces of Railroad Engineering now being Projected through the Heart of the Pyrenees

      • By F. Honoré on August 23, 1919

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      More in the August 23, 1919 issue of Scientific American
      • Ernst Heinrich Haeckel, 1834-1919
      • Legitimization of Soya Bean Oil
      • Some Damp Reflections, Present Striking Use of X-Ray in Metallurgy and more
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