Mr V Cerulli reports his observations made at Teramo, in the Bulletin of the Belgian Astronomical Society, and accompanies his account with a chart and 11 drawings made December 1896 and January 7, 1897, with a 15½-in. Cooke refractor.
He remarks that the canals appeared hardly thinner on a disk
of 7 " (July 1896), than they were on the disk of 17" (December) and,
therefore, supposes that the lines become thicker as Mars travels away. He also
found that lines that appeared dark and distinct when near the limb became
fainter and narrower when on the meridian.
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