Stars and telescopes; a hand-book of popular astronomy founded on the 9th ed. of Lynn's Celestial motions (1901)
Todd, David P. (David Peck), 1855-1939, Lynn, William Thynne, 1835-1911 · Boston, Little, Brown · leaf 214
96-97. The north polar cap was first seen in August 1S96,practically central over the planets north pole, and covering astretch of 500 in latitude, equivalent to 1800 miles. Seasonal changes are well illustrated in the colored plate(see Frontispiece), showing Hesperia central at three epochsmonths… … ■;■**? m\ i: & f t -0 u ^M <P. *> O3 « O o Xu « Q aQZ E>O -o H > « w t/) caO wo H 170 Stars and Telescopes Doubling of the Canals Most striking of all the phenomena of Mars is the periodicdoubling of the cauali, also discovered by Schiaparelli, whofirst detected in 1879 the…
Astronomy
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