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Nature volume 71, pages 494495 (23 March 1905) | Download Citation



THE ALTERNATING VARIABILITY OF MARTIAN CANALS.—During 1903 Mr. Lowell observed an apparent alternation in the visibility of the Martian canals Thoth and Amenthes, which he suggested might be due to the artificial regulation of a deficient water supply for irrigation purposes (NATURE, vol. lxix. p. 496).

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