satellites of, 90, 124, 126.
seasons on, 87.
supposed signals from, 110, 112.
temperature of, 120, 122.
water vapor on, 117.
Mercury, atmosphere of, 21, 28, 43, 44.
day and night on, 34, 38, 40.
dimensions, 18.
earth seen from, 41.
habitability of, 33, 40, 44.
heavens seen from, 41, 42.
heat and light on, 25, 28.
holds place of honor, 19.
length of year, 24.
mass of, 19.
moon visible from, 41.
resemblances to moon, 43.
rotation of, 30.
shape of orbit, 23.
sun as seen from, 37.
velocity in orbit, 23.
Venus seen from, 41.
virtual fall toward sun, 24.
visibility of, 21.
water on, 43.
Moon, the area of surface, 219.
atmosphere of, 7, 215, 231, 247, 248.
clouds on, 6, 245.
constitution of, 236.
craters, 221.
day and night on, 254.
distance of, 212, 215.
density of, 219.
former cataclysm on, 237.
former life on, 241, 243.
giantism on, 228, 229.
gravity on, 219, 228, 229.
libration of, 249.
meteorites and, 230.
mountains on, 220.
the older world in, 242.
origin of, 235.
phases and motions of, 250.
rotation of, 249.
seas of, 234.
size of, 218.
snow on, 246.
speculation about, 212.
temperature of, 255.
vegetation on, 6, 244, 247.
visibility of features of, 213.
Nasmyth and Carpenter on lunar craters, 224.
Neptune, description of, 208-210.
Newcomb, Simon, on Olbers's theory, 141.
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