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      Scientific American July 30, 1904

      A Section of the Hudson River Tunnel at the World's Fair

      By the St.Louis correspondent of the Scientific American

      • July 30, 1904

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      More in the July 30, 1904 issue of Scientific American
      • Business and Personal Wants
      • New York Central Express Compound Locomotive
      • Recently Patented Inventions - July 30, 1904
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