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      Knowledge is Power

      Scientific American August 03, 1907

      Illusions of Vision and the Canals of Mars

      A Study of Martian Canals by Experimental Methods

      • By Andrew Ellicott Douglass on August 3, 1907

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      More in the August 03, 1907 issue of Scientific American
      • Electrical Notes
      • Progress in Wireless Telegraphy
      • The Temple of Aizani
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