[Roman figures refer to the chapters, Arabic to the articles.]
40–42, 43, 47–49, 54; iii. 57, 68; iv. 76, 85; v. 110; vi. 127; vii. 145, 148; viii. 162; x. 201, 205, 210, 216, 227; xi. 240; xiii. 287, 301
Eclipses, partial, ii. 43
Eclipses, total, ii. 43; vii. 145; x. 205; xiii. 301
Ecliptic, i. 11, 13, 14; ii. 26, 33, 35, 36, 38, 40, 42, 51; iii. 58, 59, 68; iv. 80, 82–84, 87, 89; v. 111; viii. 154; x. 203, 209, 213, 214, 227; xi. 235, 236, 244, 246, 250
Ecliptic, obliquity of, i. 11; ii. 35, 36, 42; iii. 59, 68; iv. 83, 84; xi. 235, 236
École Polytechnique, xi. 237
Egyptians, Egyptian astronomy, i. 6, 11, 12, 16; ii. 23, 26, 30, 45; iv. 75
Elements (of Euclid), iii. 62, 66; ix. 165
Elements (of an orbit), xi. 236, 240, 242, 244, 246; xiii. 275, 276
Elements, variation of. See Variation of elements
Ellipse, ii. 51 n; iii. 66; vii. 140, 141; ix. 175, 176, 190, 194; x. 200, 209, 214; xi. 228, 236, 242, 244; xiii. 276, 278, 309
Ellipticity, x. 221
Empyrean, iii. 68
Enceladus, xii. 255
Encke's comet, xiii. 291
Encyclopaedia, the French, xi. 232
Energy, xiii. 319
Ephemerides. See Almanacks
Ephemerides (of Regiomontanus), iii. 68
Epicycle, ii. 37, 39, 41, 45, 48, 51, 54; iii. 68; iv. 85–87, 89–91; vii. 139, 150; viii. 163; ix. 170, 194
Epitome (of Kepler), vi. 132; vii. 144, 145
Epitome (of Purbach), iii. 68
Equant, ii. 51; iii. 62; iv. 85, 89, 91; vii. 139, 150
Equation of the centre, ii. 39, 48; iii. 60; v. 111
Equator, i. 9, 10, 11; ii. 33, 35, 39, 42; iv. 82, 84; v. 98; vi. 129, 133; ix. 187; x. 207, 220, 221; xiii. 285
Equator, motion of. See Precession
Equinoctial points, i. 11, 13; ii. 42. See also Aries, first point of
Equinoxes, precession of. See Precession
Essai philosophique (of Laplace), xi. 238
Evection, ii. 48, 52; iii. 60; iv. 85; v. 111; vii. 145
Evening star, i. 14. See also Venus
Exposition du Système du Monde (of Laplace), xi. 238, 242 n, 250
Faculae, viii. 153; xiii. 300, 301, 303
Figure of the earth. See Earth, shape of
Firmament, iii. 68
First point of Aries, Libra. See Aries, Libra, first point of
Fixed stars, i. 14. See Stars
Fluxions, ix. 169, 191; x. 196
Fluxions (of Maclaurin), xii. 251
Focus, vii. 140, 141; ix. 175; xi. 236
Fraunhofer lines, xiii. 299, 300, 303, 304
Front-view construction. See Herschelian telescopes
Full moon. See Moon, phases of
Fundamenta (of Hansen), xiii. 286
