Proctor, Richard A. (Richard Anthony), 1837-1888 · New York, A.C. Armstrong and son · leaf 176
mer over his southernregions. Midway between these two seasons, the sunsrays are equably distributed over both hemispheres ofMars, and then the days and nights are equal, and it isspring in that hemisphere which is passing from winterto summer, and autumn in the other hemisphere whichis passing… … > TBE PLANET MARS. 165 round the sun, giving nearly 172 days, or more than fiveand a half of our months, for each season. Figs. 19, 20, and 21 are three views of Mars, drawnby Mr. Nathaniel Green, an excellent observer, who haspaid special attention to this planet. Fig. 19 shows afaintly-marked…
Astronomy
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