INDEX.
A
Algol, the problem of, 179-184
dimensions and constitution of, 187-188, 190
Alpha Centauri, nearest star to the sun, 208
earth viewed from, 330
America, tropical, effects of eclipse in, 80-81
astronomy in, 105-106
Animals, extinct, eyes of, 17
duration of life on earth, 253-256, 272-275
Area of the sky in degrees, 238
Asteroids, airless, 132
waterless, 134
Astronomy in America, 105-106
now and thirty years ago, 148-150
and photography, 158
the doctrine of probability, 230, 241, 245
Aurora Borealis, conjectures as to cause, 163
Prof. Johnston and the "green line," 163
B
discovery of the fifth satellite of Jupiter, 105
C
Carboniferous epoch, aspect of the heavens in, 16
Castor, 201
Centauri Alpha, star nearest the sun, 208
earth viewed from, 330
Chandler, Mr., and the movements of the terrestrial pole, 67-68, 73
Colours and vibrations, 175
Coal, 257
Comets in the epoch of the coal measures, 19
connection with meteors, 167
their electric character, 168
and the law of gravitation, 199
and the Nebular Hypothesis, 222-224
nature of, 302-303
amount of refractive matter in, 304-305
weight of, 306
Holmes' comet, Swift's, 53
Lexell's comet in collision with Jupiter, 306
Comte's view of astronomy falsified, 149
Coon Butte "irons," proof of terrestrial origin of meteorites, 351-352
Critical velocities, 133
