the founder of, 10

E

Eagle, the, 424

Earth, The, ancient ideas respecting, 3;
annual movement of, and the apparent movement of the stars, 507, 512;
attraction of Jupiter, 319;
attraction of on Encke's comet, 350;
attraction of, on the Leonids, 386;
attraction of Saturn, 319;
attraction of the Moon, 75, 497;
attraction of the Sun, 496;
axial rotation of, 558;
carboniferous period on, 518;
change of climate on, 518;
composition of, 496;
contact of atmosphere of, with meteors, 377-379;
density of, 558;
diameter of, 558;
distance of, from Mars, 213;
distance of, from the Moon, 73, 558;
distance of, from the Sun, 31, 114, 184, 240, 265, 351, 512, 558;
energy from rotation of, 540;
formerly a molten globe, 200, 201;
geological records and, 517;
glacial period on, 518;
gravitation and, 204, 206, 207, 497;
heat in the interior of, 94, 197, 198, 251, 514;
how it is measured, 193-196;
its mass increasing owing to the fall of meteoric matter, 408;
its oceans once vapour, 251;
once in immediate proximity to the Moon, 542;
orbit of, 114;
orbit of, its elliptic form, 139;
path of deranged by Venus and Mars, 319;
periodic time of, 558;
plane of orbit of, 309;
polar axis of, 196, 492-502;
position of, relatively to the Sun and the Moon, 76, 77;
precession and nutation of axis of, 492-502;
radius of, 193, 512;
rotation of, 75, 196, 200, 494, 496;
shape of, 192, 195, 197, 201, 207;
size of, compared with Jupiter, 119,
and with other planets, 119;
size and weight of, compared with those of the Sun, 30,
and Moon, 74, 75;
velocity of, 115, 139, 146, 512,
and periodic time, 143;
volcanic outbreaks on, 197,
and the origin of meteorites, 405;
weight of, 202, 248,
as compared with Saturn, 271, 272

Earthquakes, astronomical instruments disturbed by, 24

Eccentricity of planetary ellipses, 136, 211

Eclipse of Jupiter's satellites, 261, 262, 265-267

Ellipse of the Moon, 77-80;
of the Sun, 53

Eclipses, ancient explanations of, 6;
calculations of the recurrence of, 79, 80

Ecliptic, the, 5, 233;
Pole of the, 493, 500, 505

Electric Light, the, 44

Ellipse, the, 136;
eccentricity of, 137;
focus of, 137;
Kepler's discoveries respecting, 136, 138, 142-144, 505;
the form which the orbit of a planet takes, 136;
the parallactic, 444;
variety of form of, 139

Enceladus, 559

Encke,