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      Scientific American April 06, 1907

      Exports of Manufactures from the United States from 1880 to 1906

      • April 6, 1907

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      More in the April 06, 1907 issue of Scientific American
      • Test on Full-Sized New York Central Spikes, made by Robert W. Hunt & Co., Engineers, New York
      • The Nobility of the Chin and the cannibals of Krapina
      • How Amundsen Prepared for the Arctic
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