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      Scientific American March 18, 1905

      The Whispering Gallery in the Capitol at Washington

      • By Wallace C. Sabine on March 18, 1905

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      More in the March 18, 1905 issue of Scientific American
      • Patents - March 18, 1905
      • The Completion of the Simplon Tunnel
      • Business and Personal Wants - March 18, 1905
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