A Short History of Astronomy

GENERAL INDEX.

Roman figures refer to the chapters, Arabic to the articles. When several articles are given under one heading the numbers of the most important are printed in clarendon type, thus: 207. The names of books are printed in italics.

Aberration, X. 206, 207-211, 212, 213, 216, 218; XII. 263; XIII. 277, 283, 284
Académie Française, XI. 232, 238
Academy of Berlin, XI. 230, 237
Academy of St. Petersburg, XI. 230, 233
Academy of Sciences (of Paris), X. 221, 223; XI. 229-233, 235-237
Academy of Turin, XI. 237, 238
Acceleration, VI. 133; IX. 171, 172, 173, 179, 180, 185, 195; X. 223
Ad Vitellionem Paralipomena (of Kepler), VII. 138
Alae sive Scalae (of Digges), V. 95
Aldebaran, III. 64; XIII. 316 n
Alexandrine school, II. 21, 31-33, 36-38, 45, 53
Alfonsine Tables, III. 66, 68; V. 94, 96, 99
Algol, XII. 266; XIII. 314, 315
Almagest (of Ptolemy), II. 46-52; III. 55, 56, 58, 60, 62, 66, 68; IV. 75, 76, 83
Almagest (of Abul Wafa), III. 60
Almagest, New (of Kepler), VII. 148
Almagest, New (of Riccioli), VIII. 153
Almanac, Nautical, X. 218; XIII. 286, 288, 290
Almanacks, I. 18 n; II. 20, 38; III. 64, 68; V. 94, 95, 100; VII. 136; X. 218, 224; XIII. 286, 288, 290
Altair, III. 64; XIII. 316 n
Analysis, analytical methods, X. 196; XI. 234
Angles, measurement of, I. 7
Annual equation, V. 111; VII. 145
Annual motion of the earth. See Earth, revolution of
Annual motion of the sun. See Sun, motion of
Annual parallax. See Parallax, stellar
Annular eclipse, II. 43; VII. 145
Anomalistic month, II. 40
Ἀντιχθών, II. 24
Apex of solar motion, XII. 265
Aphelion, IV. 85
Apogee, II. 39, 40, 48; III. 58, 59; IV. 85; V. 111; IX. 184 XI. 233
Apparent distance, I. 7
Apple, Newton’s, IX. 170
Apse, apse-line, II. 39, 40, 48; IV. 85; IX. 183; XI. 235, 236, 242, 246
Arabic numerals, III. 64; V. 96
Arabs, Arab astronomy, II. 46, 53; III. 56-61, 64, 66, 68; V. 110; VIII. 159; XII. 266
Arctic regions, II. 35
Arcturus, XII. 258
Aries, first point of (♈), I. 13; II. 33, 42; IV. 83 n; V. 98, III; X. 198
Asteroids. See Minor planets
Astrolabe, II. 49; III. 66
Astrology, I. 16, 18; III. 56; V. 99, 100; VII. 136, 149, 151
Astronomiae Fundamenta (of Lacaille), X. 224
Astronomiae Instauratae Mechanica (of Tycho), V. 107
Astronomiae Instauratae Progvmnasmata (of Tycho), V. 104
Astronomical Society, German, XIII. 280
Astronomical Society, Royal, XII. 256, 263
Astronomicum Caesareum (of Apian), V. 97
Astronomisches Jahrbuch, XII. 253
Astronomy, divisions of, XIII. 272
Astronomy, descriptive, XIII. 272, 273, 294
Astronomy, gravitational, X. 196; XIII. 272, 273, 286
Astronomy, observational, XIII. 272, 273
Astronomy, origin of, I. 2
Astronomy, scope of, I. 1
Attraction. See Gravitation
Autumnal equinox, I. II. See also Equinox
Axioms. See Laws of Motion
Axis (of an ellipse), XI. 236, 244, 245
Babylonians. See Chaldaeans
Bagdad, III. 56, 57, 60, 68
Belts of Jupiter, XII. 267
Betelgeux, III. 64
Biela’s comet, XIII. 305
Binary stars. See Stars, double and multiple
Bode’s Astronomisches Jahrbuch, XII. 253
Bodily tides, XIII. 292, 293
Brightness of stars. See Stars, brightness of
Brooks’s comet, XIII. 305
Brucia, XIII. 294
Bureau des Longitudes, XI. 238
Cairo, III. 60
Calculus of Variations, XI. 237 n
Calendar, Greek, II. 19, 20, 21
Calendar, Gregorian, II. 22; IX. 165 n; X. 217
Calendar, Julian, II. 21, 22; III. 68; IV. 73; IX. 165 n; X. 197 n, 217
Calendar, Mahometan, III. 56
Calendar, Roman, II. 21
Caliphs, III. 56, 57, 69
Canals of Mars, XIII. 297
Cartesianism, VIII. 163; IX. 191, 195; XI. 229
Castor, XII. 263, 264, 266
Catalogues of stars. See Star-catalogues
Cavendish experiment, X. 219
Celestial latitude. See Latitude, celestial
Celestial longitude. See Longitude, celestial
Celestial sphere, I. 7, 8, 9-11, 13, 14; II. 24, 26, 33, 38-40, 45, 47, 51; III. 64, 67; IV. 78, 80, 83, 88; V. 98, 105; VI. 129; VIII. 157; X. 198, 207, 208, 214; XII. 257; XIII. 272
Celestial sphere, daily motion of. See Daily motion
Celestial spheres, II. 23, 26, 27, 38, 51, 54; III. 62, 68; V. 100, 103
Centre of gravity, IX. 186
Centrifugal force, VIII. 158 n
Ceres, XIII. 276, 294
Chaldaeans (Babylonians), Chaldaean astronomy, I. 6, 11, 12, 16-18; II. 30, 34, 40, 51, 54; III. 56
Chart, photographic, XIII. 280
Chemistry of the sun, XIII. 299-301, 303
Chinese astronomy, I. 6, 11
Chords, II. 47 n
Chromosphere, X. 205; XIII. 301, 303
Chronometer, X. 226
Circular motion, II. 25, 26, 38, 51; IV. 76; VII. 139; VIII. 158; IX. 171-173. See also Eccentric, Epicycle
Circumpolar stars, I. 9; II. 35
Clock. See Pendulum clock and Chronometer
Clustering power, XII. 261. See also Condensation of nebulae
Coelum Australe Stelliferum (of Lacaille), X. 223
Collimation error, X. 225 n
Comets, I. 1; II. 30; III. 68, 69; V. 100, 103-105; VI. 127, 129; VII. 144, 146; VIII. 153; IX. 190, 192; X. 200, 205, 217, 224; XI. 228, 231, 243, 248, 250; XII. 253, 256, 259; XIII. 272, 291, 304, 305, 307
Comet, Biela’s, XIII. 305
Comet, Brooks’s, XIII. 305
Comet, Encke’s, XIII. 291
Comet, Halley’s, VII. 146; X. 200, 205; XI. 231, 232; XIII. 291, 307
Comet, Lexell’s, XI. 248; XIII. 305
Comet, Olbers’s, XIII. 291
Comet, Pons-Brooks, XIII. 291
Comet, Tebbutt’s, XIII. 305
Comet, Tuttle’s, XIII. 291
Cometographia (of Hevel), VIII. 153
Commentaries on the Motions of Mars (of Kepler), VII. 135 n, 139, 141, 150 n
Commentariolus (of Coppernicus), IV. 37; V. 100
Compleat System of Optics (of Smith), XII. 251
Complete induction, IX. 195
Condensation of nebulae, XI. 250; XII. 261; XIII. 318
Conic, conic section, VII. 140 n; XIII. 309
Conjunction, II. 43, 48 n; III. 60; V. 110, III; X. 227
Conservation of energy, XIII. 319
Constant of aberration, X. 209, 210; XIII. 283 n
Constellations, I. 12, 13; II. 20, 26, 34, 42; X. 223
Construction of the heavens, XII. 257. See also Sidereal system, structure of
Corona, VII. 145; X. 205; XIII. 301, 303
Counter-earth, II. 24
Crape-ring, XII. 267; XIII. 295
Craters (on the moon), VIII. 153; XIII. 296
Curvature of the earth. See Earth, shape of
Daily Motion (of the celestial sphere), I. 5, 8, 9, 10; II. 23, 24, 26, 33, 38, 39, 46, 47; III. 67, 68; IV. 78, 80, 83; V. 98, 105; VI. 129; VIII. 157
D’Alembert’s principle, XI. 232, 237 n
Damascus, III. 57
Darlegung (of Hansen), XIII. 286
Day, I. 4, II. 16; II. 47; XIII. 287, 293, 320
Day-and-night, I. 16 n
Day-hour, I. 16
Declination, II. 33, 35, 39; X. 213, 218; XIII. 276
Declination circle, II. 33
De Coelo (of Aristotle), II. 27
Deductive method, inverse, IX. 195
Deferent, II. 39, 48, 51; III. 68; IV. 86, 87
Degree, I. 7
Deimos, XIII. 295
De Magnete (of Gilbert), VII. 150
De Motu (of Newton), IX. 177, 191
De Mundi aetherei (of Tycho), V. 104
De Nova Stella (of Tycho), V. 100
De Revolutionibus (of Coppernicus), II. 41 n; IV. 74-92; V. 93, 94; VI. 126
De Saturni Luna (of Huygens), VIII. 154
Descriptive astronomy, XIII. 272, 273, 294
Deviation error, X. 225 n
Dialogue on the Two Chief Systems (of Galilei), VI. 124 n, 128-132, 133
Differential method of parallax, VI. 129; XII. 263; XIII. 278
Diffraction-grating, XIII. 299
Dione, VIII. 160
Dioptrice (of Kepler), VII. 138
Direct motion, I. 14
Disturbing force. See Perturbations
Diurnal method of parallax, XIII. 281, 284
Doctrine of the sphere. See Spherics
Doppler’s principle, XIII. 302, 313, 314
Double hour, I. 16
Double-star method of parallax. See Differential method of parallax
Double stars. See Stars, double and multiple
Draconitic month, II. 40, 43
Durchmusterung, XIII. 280
Dynamics, VI. 133, 134; IX. 179, 180; XI. 230, 232, 237
Dynamique, Traité de (of D’Alembert), XI. 232
Earth, I. 1, 15, 17; II. 28, 29, 32, 39, 41, 43, 47, 49, 51; III. 66, 69; IV. 80, 86; VI. 117, 121, 133; VII. 136 n, 144, 145, 150; VIII. 153, 154; IX. 173, 174, 179-182, 184, 186, 195; XI. 228, 245; XIII. 285, 287, 292, 293, 297, 320. See also the following headings
Earth, density, mass of, IX. 180, 185, 189; X. 219; XI. 235; XIII. 282, 294
Earth, motion of, II. 24, 32, 47; IV. 73, 76, 77; V. 96. 97, 105; VI. 121, 125-127, 129-132; VIII. 161, 162; IX. 186, 194; XII. 257. See also Earth, revolution of and rotation of
Earth, revolution of, annual motion of, II. 23, 24, 28 n, 30, 47; IV. 75, 77, 79-82, 85-88, 89, 90, 92; V. 111; VI. 119, 126, 129, 131, 133; VII. 139, 142, 146; VIII. 161; IX. 172, 183; X. 207-210, 212, 227; XI. 235, 236, 240; XII. 263; XIII. 278, 282, 283
Earth, rigidity of, XIII. 285, 292
Earth, rotation of, daily motion of, II. 23, 24, 28 n; IV. 75, 78, 79 n, 80, 84; V. 105; VI. 124, 126, 129, 130; IX. 174, 194; X. 206, 207, 213; XIII. 281, 285, 287, 320
Earth, shape of, II. 23, 29, 35, 45, 47, 54; IV. 76; VIII. 161; IX. 187, 188; X. 196, 213, 215, 220, 221, 222, 223; XI. 229, 231, 237, 248
Earth, size of, II. 36, 41, 45, 47, 49; III. 57, 69; IV. 85; VII. 145; VIII. 159, 161; IX. 173, 174; X. 221, 222, 223
Earth, zones of, II. 35, 47
Earthshine, III. 69
Easter, rule for fixing, II. 20
Eccentric, II. 37, 39, 40, 41, 48, 51; III. 59; IV. 85, 89, 91; VII. 139, 150
Eccentricity, II. 39; IV. 85; VII. 140 n; XI. 228, 236, 240, 244-246, 250; XIII. 294, 318
Eccentricity fund, XI. 245
Eclipses, I. 11, 15, 17; II. 29, 32, 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, annular, II. 43; VII. 145
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 Normale, XI. 237, 238
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
Empty month, II. 19, 20
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, I. 11; II. 39, 42
Equinoxes, precession of. See Precession
Essai philosophique (of Laplace), XI. 238
Ether, XIII. 293, 299
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
Force, VI. 130; IX. 180, 181
Fraunhofer lines, XIII. 299, 300, 303, 304
Front-view construction. See Herschelian telescopes
Full month, II. 19, 20
Full moon. See Moon, phases of
Fundamenta (of Hansen), XIII. 286
Fundamenta Astronomiae (of Bessel), X. 218; XIII. 277
Funds of eccentricity, inclination, XI. 245
Galactic circle, XII. 258, 260
Galaxy. See Milky Way
Gauges, gauging. See Star-gauging
Georgium Sidus. See Uranus
Gravitation, gravity, II. 38 n; VII. 150; VIII. 158, 161; IX. passim; X. 196, 201, 213, 215, 219, 220, 223, 226; XI. passim; XII. 264; XIII. 282, 284, 286-293, 309, 319
Gravitational astronomy, X. 196; XIII. 272, 273, 286
Gravity, variation of, VIII. 161; IX. 180; X. 199, 217, 221, 223; XI. 231
Great Bear, I. 12; XII. 266
Great circle, I. 11; II. 33, 42; IV. 82, 84
Gregorian Calendar. See Calendar, Gregorian
Grindstone theory, XII. 258; XIII. 317
Hakemite Tables, III. 60, 62
Halley’s comet, VII. 146; X. 200, 205; XI. 231, 232; XIII. 291, 307
Harmonics (of Smith), XII. 251
Harmony of the World (of Kepler), VII. 144
Helium, XIII. 301
Herschelian telescope, XII. 255, 256
Historia Coelestis (of Flamsteed), X. 198
Holy Office. See Inquisition
Horizon, I. 3, 9; II. 29, 33, 35, 39, 46; VIII. 161; XIII. 285
Horoscopes, V. 99
Hour, I. 16
Hydrostatic balance, VI. 115 n
Hyperbola, IX. 190; XI. 236 n
Hyperion, XIII. 295
Ilkhanic Tables, III. 62
Il Saggiatore (of Galilei), VI. 127
Inclination, III. 58; IV. 89; XI. 228, 244, 245, 246, 250; XIII. 294, 318
Inclination fund, XI. 245
Index of Prohibited Books, VI. 126, 132; VII. 145
Indians, Indian astronomy, I. 6; III. 56, 64
Induction, complete, IX. 195
Inequalities, long, XI. 243
Inequalities, periodic, XI. 242, 243, 245, 247
Inequalities, secular, XI. 242, 243-247; XIII. 282. See also Perturbations
Inequality, parallactic, XIII. 282
Inferior planets, I. 15; IV. 87, 88. See also Mercury, Venus
Inquisition (Holy Office), VI. 126, 132, 133
Institute of France, XI. 241
Inverse deductive method, IX. 195
Inverse square, law of, IX. 172-176, 181, 195; XI. 233. See also Gravitation
Ionian school, II. 23
Iris, XIII. 281
Irradiation, VI. 129
Island universe theory, XII. 260; XIII. 317
Japetus, VIII. 160; XII. 267; XIII. 297
Julian Calendar. See Calendar, Julian
Juno, XIII. 294
Jupiter, I. 14-16; 11. 25, 51; IV. 81, 87, 88; V. 98, 99; VI. 121, 127; VII. 136 n, 142, 144, 145, 150; VIII. 154, 156, 162; IX. 172, 181, 183, 185-187; X. 204, 216; XI. 228, 231, 235, 236, 243-245, 248; XII. 267; XIII. 281, 288, 294, 297, 305. See also the following headings
Jupiter, belts of, XII. 267
Jupiter, mass of, IX. 183, 185
Jupiter, rotation of, VIII. 160; IX. 187; XIII. 297
Jupiter, satellites of, II. 43; VI. 121, 127, 129, 133; VII. 145, 150; VIII. 160, 162; IX. 170, 184, 185; X. 210, 216; XI. 228, 248; XII. 267; XIII. 283, 295, 297
Jupiter’s satellites, mass of, XI. 248
Kepler’s Laws, VII. 141, 144, 145, 151; VIII. 152; IX. 169, 172, 175, 176, 186, 194, 195; X. 220; XI. 244; XIII. 294, 309
Latitude (celestial), II. 33, 42, 43; III. 63; IV. 89
Latitude (terrestrial), III. 68, 69; IV. 73; X. 221; XIII. 285
Latitude, variation of, XIII. 285
Law of gravitation. See Gravitation
Laws of motion, VI. 130, 133; VIII. 152, 163; IX. 171, 179-181, 183, 186, 194, 195; XI. 232
Leap-year, I. 17; II. 21, 22
Least squares, XIII. 275, 276
Letter to the Grand Duchess (of Galilei), VI. 125
Level error, X. 225 n
Lexell’s comet, XI. 248; XIII. 305
Libra, first point of (♎), I. 13; II. 42
Librations of the moon, VI. 133; X. 226; XI. 237, 239
Libros del Saber, III. 66
Light-equation, XIII. 283
Light, motion of, velocity of, VIII. 162; X. 208-211, 216, 220; XIII. 278, 279, 283, 302. See also Aberration
Logarithms, V. 96, 97 n
Long inequalities, XI. 243
Longitude (celestial), II. 33, 39, 42, 43; III. 63; IV. 87; VII. 139
Longitude (terrestrial), III. 68; VI. 127, 133; VII. 150; X. 197, 216, 226
Longitudes, Bureau des, XI. 238
Lunar distances, III. 68 n
Lunar eclipses. See Eclipses
Lunar equation, XIII. 282
Lunar theory, II. 48, 51; V. 111; VII. 145; VIII. 156; IX. 184, 192; X. 226; XI. 228, 230, 231, 233, 234, 240, 241, 242, 248; XIII. 282, 286, 287, 288, 290. See also Moon, motion of
Lunation, II. 40. See also Month, synodic
Macchie Solari (of Galilei), VI. 124, 125
Magellanic clouds, XIII. 307
Magnetism, VII. 150; XIII. 276, 298
Magnitudes and Distances of the Sun and Moon (of Aristarchus), II. 32
Magnitudes of stars, II. 42; XII. 266; XII. 280, 316. See also Stars, brightness of
Mars, I. 14-16; II. 25, 26, 30, 51; III. 68; IV. 81, 87; V. 108; VI. 129; VII. 136 n, 139-142, 144, 145; VIII. 154, 161; IX. 181, 183, 185; X. 223, 227; XI. 235, 245; XII. 267; XIII. 281, 282, 284, 294, 295, 297. See also the following headings
Mars, canals of, XIII. 297
Mars, mass of, XI. 248
Mars, opposition of, VIII. 161; XIII. 281, 284, 297
Mars, rotation of, VIII. 160; XIII. 295, 297
Mars, satellites of, XIII. 295
Mass, IX. 180, 181, 185
Mass of the earth, sun, Venus.... See Earth, Sun, Venus ... mass of
Mécanique Analytique (of Lagrange), XI. 237
Mécanique Celeste (of Laplace), XI. 238, 241, 247, 249, 250; XIII. 292
Medicean Planets. See Jupiter, satellites of
Meraga, III. 62
Mercury, I. 14-16; II. 25, 26, 45, 47, 51; III. 66; IV. 73, 75, 81, 86-89; VI. 121, 124; VII. 136 n, 139, 142, 144; IX. 185; XIII. 288, 290, 294, 297. See also the following headings
Mercury, mass of, XI. 248
Mercury, phases of, VI. 129
Mercury, rotation of, XIII. 297
Mercury, transit of, X. 199
Meridian, II. 33, 39; III. 57; VI. 127; VIII. 157; X. 207, 218, 221
Meteorologica (of Aristotle), II. 27
Meteors, XIII. 305
Meton’s cycle, II. 20
Metric system, XI. 237
Micrometer, VIII. 155; XIII. 279, 281
Milky Way, II. 30, 33; VI. 120; XII. 258, 260-262; XIII. 317
Mimas, XII. 255
Minor planets, XI. 250 n; XIII. 276, 281, 284, 288, 294, 295, 297, 318
Minor planets, mass of, XIII. 294
Minute (angle), I. 7
Mira, XII. 266
Mongols, Mongol astronomy, III. 62
Month, I. 4, 16; II. 19-21, 40, 48; IX. 173; XI. 240; XIII. 293, 320. See also the following headings
Month, anomalistic, II. 40
Month, draconitic, II. 40, 43
Month, empty, II. 19, 20
Month, full, II. 19, 20
Month, lunar, I. 16; II. 19, 20, 40
Month, sidereal, II. 40
Month, synodic, II. 40, 43
Moon, I. 1, 4, 5, 11, 13-16; II. 19-21, 25, 28, 30, 32, 39, 43; III. 68, 69; IV. 81, 86; V. 104, 105 n; VI. 119, 121, 123, 129, 130, 133; VII. 145, 150; VIII. 153; IX. 169, 180, 181, 188, 189; X. 198, 204, 213, 215, 226; XI 228, 235; XII. 256, 257, 271; XIII. 272, 292, 293, 296, 297, 301, 320. See also the following headings
Moon, angular or apparent size of, II. 32, 41, 43, 46 n, 48; IV. 73, 85, 90; V. 105 n
Moon, apparent flattening of, II. 46
Moon, atmosphere of, XIII. 296
Moon, distance of, I. 15; II. 24, 25, 30, 32, 41, 43, 45, 48, 49, 51; IV. 85, 90; V. 100, 103; IX. 173 185; X. 223; XIII. 293, 320
Moon, eclipses of. See Eclipses
Moon, librations of, VI. 133; X. 226; XI. 237, 239
Moon, map of, X. 226; XIII. 296
Moon, mass of, IX. 188, 189 XI. 235
Moon, motion of, I. 4, 8, 13, 15, 17; II. 20, 24-26, 28, 37, 39, 40, 43, 47, 48, 51; III. 60; IV. 73, 81, 85, 89, 90; V. 111; VI. 133; VII. 145, 150; VIII. 156; IX. 169, 173, 174, 179, 184, 185, 189, 194, 195; X. 201, 204, 213, 226; XI. 235, 237, 248; XIII. 287, 290, 297, 320. See also Lunar theory
Moon, origin of, XIII. 320
Moon, parallax of, II. 43, 49; IV. 85. Cf. also Moon, distance of
Moon, phases of, I. 4, 16, 17; II. 19, 20, 23, 28, 43, 48; III. 68, 69; VI. 123
Moon, rotation of, X. 226; XI. 248; XII. 267; XIII. 297
Moon, shape of, II. 23, 28, 46; VI. 119; XI. 237
Moon, size of, II. 32, 41; IV. 85
Moon, tables of. See Tables, lunar
Moons. See Satellites
Morning star, I. 14. See also Venus
Morocco, III. 61
Motion, laws of. See Laws of motion
Multiple stars. See Stars, double and multiple
Mural quadrant, X. 218, 225 n
Music of the spheres, II. 23; VII. 144
Mysterium Cosmographicum (of Kepler), V. 108; VII. 136, 144
Nadir, III. 64
Nautical Almanac. See Almanac, Nautical
Nebula in Argus, XIII. 307
Nebula in Orion, XII. 252, 259, 260; XIII. 311
Nebulae, X. 223; XI. 250; XII. 252, 256, 259-261; XIII. 306-308, 310, 311, 317, 318, 319, 320
Nebulae, spiral, XIII. 310
Nebular hypothesis, XI. 250; XIII. 318-320
Nebulous stars, X. 223; XII. 260, 261
Neptune, XIII. 289, 295, 297
Neptune, satellite of, XIII. 295
New Almagest (of Kepler), VII. 148
New Almagest (of Riccioli), VIII. 153
New moon. See Moon, phases of
New stars. See Stars, new
New Style (N.S.), II. 22. See also Calendar, Gregorian
Newton’s problem, XI. 228, 229, 249
Newtonian telescope, IX. 168; XII. 252, 253, 256
Night-hour, I. 16
Node, II. 40, 43; V. 111; IX. 184; X. 213, 214; XI. 236, 246
Nubeculae, XIII. 307
Nucleus (of a comet), XIII. 304
Nürnberg school, III. 68; IV. 73
Nutation, X. 206, 207, 213-215, 216, 218; XI. 232, 248; XII. 263
Νυχθήμερον, I. 16 n
Oberon, XII. 255
Obliquity of the ecliptic. See Ecliptic, obliquity of
Observational astronomy, XIII. 272, 273
Occultations, I. 15; II. 30
Octaeteris, II. 19
Olbers’s comet, XIII. 291
Old Moore’s Almanack, I. 18 n
Old Style (O.S.). See Calendar, Julian
Opposition, II. 43, 48 n; III. 60; IV. 87, 88; V. 111; VIII. 161; XIII. 281, 284, 297
Opposition of Mars, VIII. 161; XIII. 281, 284, 297
Optical double stars, XII. 264
Optics (of Gregory), X. 202
Optics (of Newton), IX. 192
Optics (of Ptolemy), II. 46
Optics (of Smith), XII. 251
Opus Majus, Minus, Tertium (of Bacon), III. 67
Opuscules Mathématiques (of D’Alembert), XI. 233
Orion, nebula in, XII. 252, 259, 260; XIII. 311
Oscillatorium Horologium (of Huygens), VIII. 158; IX. 171
Pallas, XIII. 294
Parabola, IX. 190; XI. 236 n; XIII. 276
Parallactic inequality, XIII. 282
Parallax, II. 43, 49; IV. 85, 92; V. 98, 100, 110; VI. 129; VII. 145; VIII. 161; X. 207, 212, 223, 227; XII. 257, 258, 263, 264; XIII. 272, 278, 279, 281-284
Parallax, annual, VIII. 161. See also Parallax, stellar
Parallax, horizontal, VIII. 161
Parallax of the moon. See Moon, parallax of
Parallax of the sun. See Sun, parallax of
Parallax, stellar, IV. 92; V. 100; VI. 129; VIII. 161; X. 207, 212; XII. 257, 258, 263, 264; XIII. 272, 278, 279
Parallelogram of forces, IX. 180 n
Parameters, variation of, XI. 233 n. See also Variation of elements
Παραπήγματα II. 20
Partial eclipses, II. 43
Pendulum, pendulum clock, V. 98; VI. 114; VIII. 157, 158, 161; IX. 180, 187; X. 199, 217, 221, 223; XI. 231. See also Gravity, variation of
Pendulum Clock (of Huygens), VIII. 158; IX. 171
Penumbra (of a sun-spot), VI. 124; XII. 268
Perigee, II. 39, 40, 48; IV. 85. See also Apse, apse-line
Perihelion, IV. 85; XI. 231. See also Apse, apse-line
Periodic inequalities. See Inequalities, periodic
Perturbations, VIII. 156; IX. 183, 184; X. 200, 204, 224, 227; XI. passim; XIII. 282, 293, 294, 297
Phases of the moon. See Moon, phases of
Phenomena (of Euclid), II. 33
Phobos, XIII. 295
Photography, XIII. 274, 279-281, 294, 298, 299, 301, 306
Photometry, XIII. 316. See also Stars, brightness of
Photosphere, XII. 268; XIII. 303
Physical double stars, XII. 264. See also Stars, double and multiple
Planetary tables. See Tables, planetary
Planetary theory, II. 51, 52, 54; III. 68; IV. 86-90; XI. 228, 230, 231, 233, 235, 236, 242-247, 248; XIII. 286, 288-290, 293, See also Planets, motion of
Planets, I. 13, 14, 15, 16; II. 23-27, 30, 32, 51; III. 68; IV. 81; V. 104, 105, 110, 112; VI. 119, 121; VII. 136, 144; VIII. 154, 155; X. 200; XI. 228, 250; XII. 253, 255, 257, 267, 271; XIII. 272, 275, 276, 281, 282, 294-296, 297, 318, 320. See also the following headings, and the several planets Mercury, Venus, etc.
Planets, discoveries of, XII. 253, 254, 255, 267; XIII. 289, 294, 295, 318
Planets, distances of, I. 15; II. 30, 51; IV. 81, 86, 87; VI. 117; VII. 136, 144; IX. 169, 172, 173
Planets, inferior, I. 15; IV. 87, 88. See also Mercury, Venus
Planets, masses of, IX. 185; XI. 245, 248; XIII. 294. See also under the several planets
Planets, minor. See Minor planets
Planets, motion of, I. 13, 14, 15; II. 23-25, 26, 27, 30, 41, 45, 47, 51, 52; III. 62, 68; IV. 81, 86-90, 92; V. 100, 104, 105, 112; VI. 119, 121, 129; VII. 139-142, 144, 145, 150, 151; VIII. 152, 156; IX. 169, 170, 172-177, 181, 183, 194; X. 199, 204; XI. 228, 229, 245, 250; XIII. 275, 276, 282, 294. See also Planetary theory
Planets, rotation of, VIII. 160; IX. 187; XI. 228, 250; XII. 267; XIII. 297
Planets, satellites of. See Satellites
Planets, stationary points of, I. 14; II. 51; IV. 88
Planets, superior, I. 15; IV. 87, 88. See also Mars, Jupiter, etc.
Pleiades, VI. 120; XII. 260
Poles (of a great circle), II. 33 n
Poles (of the celestial sphere), I. 8, 9, 10; II. 33, 35; IV. 78; VI. 129; X. 207, 214; XIII. 285
Poles (of the earth), IV. 82; IX. 187; X. 220, 221; XIII. 285
Pole-star, I. 8, 9
Pollux, XII. 266
Pons-Brooks comet, XIII. 291
Postulates (of Ptolemy), II. 47
Postulates (of Coppernicus), IV. 76
Praesepe, XII. 260
Precession (of the equinoxes), II. 42, 50; III. 58, 59, 62, 68; IV. 73, 83, 84, 85; V. 104, 112; VI. 129; IX. 188, 192; X. 213-215, 218, 221; XI. 228, 232, 248; XIII. 277, 280
Prima Narratio (of Rheticus), IV. 74; V. 94
Primum Mobile, III. 68
Principia (of Descartes), VIII. 163
Principia (of Newton), IV. 75; VIII. 152; IX. 164, 177-192, 195; X. 196, 199, 200, 213; XI. 229, 234, 235, 240
Principles of Philosophy (of Descartes), VIII. 163
Probabilités, Théorie Analytique des (of Laplace), XI. 238
Problem of three bodies. See Three bodies, problem of
Prodromus Cometicus (of Hevel), VIII. 153
Prominences, XIII. 301, 302, 303
Proper motion (of stars), X. 203, 225; XII. 257, 265; XIII. 278, 280
Prosneusis, II. 48; III. 60; IV. 85
Prussian Tables, V. 94, 96, 97, 99; VII. 139
Pythagoreans, II. 24; IV. 75
Quadrant, V. 99; X. 218, 225 n
Quadrature, II. 48; III. 60; V. 111
Quadrivium, III. 65
Recherches sur différens points (of D’Alembert), XI. 233, 235
Recherches sur la précession (of D’Alembert), XI. 215
Reduction of observations, X. 198, 218; XIII. 277
Reflecting telescopes, IX. 168; XII. 251-255
Refracting telescopes, IX. 168. See also Telescopes
Refraction, II. 46; III. 68; V. 98, 110; VII. 138; VIII. 159, 160; X. 217, 218, 223; XIII. 277
Relative motion, principle of, IV. 77; IX. 186 n
Renaissance, IV. 70
Results of Astronomical Observations (of John Herschel), XIII. 308
Retrograde motion, I. 14
Reversing stratum, XIII. 303
Reviews of the heavens, XII. 252, 253
Revival of Learning, IV. 70
Rhea, VIII. 160
Rigel, III. 64
Right ascension, II. 33, 39; X. 198, 218; XIII. 276
Rills, XIII. 296
Rings of Saturn. See Saturn, rings of
Rotation of the celestial sphere. See Daily motion
Rotation of the earth, sun, Mars, etc. See Earth, Sun, Mars, etc., rotation of
Royal Astronomical Society. See Astronomical Society, Royal
Royal Society, IX. 166, 174, 177, 191, 192; X. 201, 202, 206, 208; XII. 254, 256, 259, 263; XIII. 292, 308
Rudolphine Tables, V. 94; VII. 148, 151; VIII. 156
Ruler, I. 16
Running down of the solar system, XIII. 293, 319
Saggiatore (of Galilei), VI. 127
Sappho, XIII. 281
Saros, I. 17; II. 43
Satellites, VI. 121, 127, 129, 133; VII. 145, 150; VIII. 154, 160, 162; IX. 170, 183-185; X. 210, 216; XI. 228, 248; XII. 253, 255, 267; XIII. 272, 283, 295, 296, 297, 318, 320. See also Jupiter, Saturn, etc., satellites of
Satellites, direction of revolution of, XI. 250; XIII. 295, 318
Satellites, rotation of, XI. 250; XII. 267; XIII. 297
Saturn, I. 14-16; II. 25, 51; IV. 81, 87; V. 99; VI. 123; VII. 136 n, 142, 144; VIII. 154, 156; IX. 183, 185, 186; X. 204; XI. 228, 231, 235, 236, 243-246; XII. 253, 267; XIII. 288, 297. See also the following headings
Saturn, mass of, IX. 185
Saturn, rings of, VI. 123; VIII. 154, 160; XI. 228, 248; XII. 267; XIII. 295, 297
Saturn, rotation of, XII. 267; XIII. 297
Saturn, satellites of, VIII. 154, 160; IX. 184; XI. 228; XII. 253, 255, 267; XIII. 295, 297, 307
Scientific method, II, 54; VI. 134; IX. 195
Seas (on the moon), VI. 119; VIII. 153; XIII. 296
Seasons, I. 3; II. 35, 39; IV. 82; XI. 245
Second (angle), I. 7
Secular acceleration of the moon’s mean motion, X. 201; XI. 233, 234, 240, 242; XIII. 287
Secular inequalities. See Inequalities, secular
Selenographia (of Hevel), VIII. 153
Selenotopographische Fragmente (of Schroeter), XII. 271
Sequences, method of, XII. 266
Shadow of earth, moon. See Eclipses
“Shining-fluid” theory, XII. 260; XIII. 310, 311
Shooting stars. See Meteors
Short-period comets, XIII. 291
Sidereal month, II. 40
Sidereal period, IV. 86, 87
Sidereal system, structure of, XII. 257, 258, 259-262; XIII. 317
Sidereal year, II. 42
Sidereus Nuncius (of Galilei), VI. 119-122
“Sights,” V. 110; VIII. 155; X. 198
Signs of the zodiac, I. 13
Sine, II. 47 n; III. 59 n, 68 n
Sirius, XIII. 316 n
Solar eclipse. See Eclipse
Solar system, stability of, XI. 245; XIII. 288, 293
Solstices, I. 11; II. 36, 39, 42
Solstitial points, I. 11
Space-penetrating power, XII. 258
Spanish astronomy, III. 61, 66
Spectroscope, XIII. 299. See also Spectrum analysis
Spectrum, spectrum analysis, IX. 168; XIII. 273, 299-302, 303, 304, 306, 309, 311-314, 317, 318
Sphaera Mundi (of Sacrobosco), III. 67
Sphere, attraction of, IX. 173, 182; XI. 228
Sphere, celestial. See Celestial sphere
Sphere, doctrine of the. See Spherics
Spheres, celestial, crystal. See Celestial spheres
Spheres, music of the, II. 23; VII. 144
Spherical form of the earth, moon. See Earth, Moon, shape of
Spherics, II. 33, 34
Spica, II. 42
Spiral nebulae, XIII. 310
Stability of the solar system, XI. 245; XIII. 288, 293
Stadium, II. 36, 45, 47
Star-atlases, star-maps, I. 12 n; X. 198, 223; XII. 259, 266; XIII. 280, 294
Star-catalogues, II. 32, 42, 50; III. 62, 63; IV. 83; V. 98, 107, 110, 112; VIII. 153; X. 198, 199, 205, 218, 223-225; XII. 257; XIII. 277, 280, 316
Star-clusters, VI. 120; X. 223; XII. 258, 259, 260, 261; XIII. 307, 308, 310, 311, 318
Star-gauging, XII. 258; XIII. 307
Star-groups. See Constellations
Stars, I. 1, 5, 7-10, 12-15, 18; II. 20, 23-26, 29, 30, 32, 33, 39, 40, 42, 45-47, 50; III. 56, 57, 62, 68; IV. 73, 78, 80, 86, 89, 92; V. 96-100, 104, 105, 110; VI. 120, 121, 129; VIII. 155, 157, 161; IX. 186 n; X. 198, 199, 203, 207-214, 218, 223; XI. 228; XII. 253, 257-266, 267; XIII. 272, 277-280, 283, 304, 306-318, 320. See also the preceding and following headings
Stars, binary. See Stars, double and multiple
Stars, brightness of, II. 42; XII. 258, 266; XIII. 278, 280, 316, 317. See also Stars, variable
Stars, circumpolar, I. 9; II. 35
Stars, colours of, XII. 263; XIII. 309
Stars, distances of, I. 7; II. 30, 32, 45, 47; IV. 80, 92; V. 100; VI. 117, 129; XI. 228; XII. 257, 258, 265, 266; XIII. 278, 279, 317. See also Parallax, stellar
Stars, distribution of, XII. 257, 258. See also Sidereal system, structure of
Stars, double and multiple, XII. 256, 263, 264; XIII. 306-308, 309, 314, 320
Stars, magnitudes of, II. 42; XII. 266; XIII. 280, 316. See also Stars, brightness of
Stars, motion of. See Stars, proper motion of, and Daily motion (of the celestial sphere)
Stars, names of, I. 12, 13; III. 64
Stars, nebulous, X. 223; XII. 260, 261
Stars, new, II. 42; V. 100, 104; VI. 117, 129; VII. 138; XII. 266; XIII. 312
Stars, number of, I. 7 n; XIII. 280
Stars, parallax of. See Parallax, stellar
Stars, proper motion of, X. 203, 225; XII. 257, 265; XIII. 278, 280
Stars, rotation of, XII. 266
Stars, spectra of, XIII. 311-314, 317
Stars, system of. See Sidereal system, structure of
Stars, variable, XII. 266, 269; XIII. 307, 312, 314, 315
Stationary points, I. 14; II. 51; IV. 88
Stjerneborg, V. 101
Summer solstice, I. 11. See also Solstices
Sun, I. 1, 4, 10, 13, 14, 16; II. 21, 23-26, 28-30, 32, 35, 36, 40, 43, 45, 48, 51; III. 68, 69; IV. 73, 75, 77, 79-82, 85-90, 92; V. 98, 103, 105, 110, 111; VI. 119, 121, 123, 124, 126, 127, 129, 132; VII. 136, 139-141, 144-146, 150; VIII. 153, 154, 156; IX. 170, 172-175, 181, 183-186, 188-190, 194; X. 198, 200, 202, 205, 210, 213, 223, 227; XI. 228, 235, 236, 240, 243, 245, 250; XII. 257, 265, 268, 269; XIII. 272, 278, 283, 288, 292-294, 297, 298-303, 304, 305, 307, 319, 320. See also the following headings
Sun, angular or apparent size of, II. 32, 38, 39, 41, 43, 46 n, 48; IV. 73, 90; V. 105 n
Sun, apparent flattening of, II. 46
Sun, distance of, I. 15; II. 24, 25, 30, 32, 38, 41, 43, 45, 48, 49, 51; IV. 81, 85, 86, 87, 90, 92; V. 111; VII. 144, 145; VIII. 156, 161: IX. 185, 188; X. 202, 205, 223, 227; XI. 235; XIII. 278, 281-284
Sun, eclipses of. See Eclipses
Sun, heat of, XII. 268, 269; XIII. 303, 307, 319
Sun, mass of, IX. 183, 184, 185, 189; XI. 228; XIII. 282
Sun, motion of, I. 3, 5, 8, 10, 11, 13, 15-17; II. 20, 21, 24-26, 35, 37, 38, 39, 40, 42, 43, 47, 48, 51; III. 59; IV. 73, 77, 79, 85, 86, 87, 92; V. 104, 105, 111; VI. 121, 126, 127, 132; VIII. 160; IX. 186; X. 223; XI. 235; XII. 265; XIII. 288
Sun, parallax of, II. 43; V. 98, 110; VII. 145; VIII. 161; X. 223, 227; XIII. 281-284. See also Sun, distance of
Sun, rotation of, VI. 124; VII. 150; XI. 250; XIII. 297, 298, 302
Sun, size of, II. 32; IV. 85; VII. 145; IX. 173; XIII. 319
Sun, tables of. See Tables, solar
Sun-dials, II. 34
Sun-spots, VI. 124, 125; VIII. 153; XII. 268, 269; XIII. 298, 300, 302, 303
Superior planets, I. 15; IV. 87, 88. See also Mars, Jupiter, etc.
Svea, XIII. 294
Synodic month, II. 40, 43
Synodic period, IV. 86, 87
Synopsis of Cometary Astronomy (of Halley), X. 200
Systema Saturnium (of Huygens), VIII. 154
Système du Monde (of Laplace), XI. 238, 242 n, 250
Système du Monde (of Pontécoulant), XIII. 286
Table Talk (of Luther), IV. 73
Tables, astronomical, III. 58, 60-63, 66, 68; IV. 70; V. 94, 96, 97, 99, 110; VII. 139, 148; VIII. 156, 160; X. 216, 217; XIII. 277. See also the following headings
Tables, lunar, II. 48; III. 59; X. 204, 216, 217, 226; XI. 233, 234, 241; XIII. 286, 290
Tables, planetary, III. 63; V. 108, 112; VII. 142, 143; X. 204, 216; XI. 235, 247; XIII. 288, 289, 290
Tables, solar, III. 59; IV. 85; V. 111; VIII. 153; X. 224, 225, 226; XI. 235, 247; XIII. 290
Tables, Alfonsine, III. 66, 68; V. 94, 96, 99
Tables, Hakemite, III. 60, 62
Tables, Ilkhanic, III. 62
Tables, Prussian, V. 94, 96, 97, 99; VII. 139
Tables, Rudolphine, V. 94; VII. 148, 151; VIII. 156
Tables, Toletan, III. 61, 66
Tables de la Lune (of Damoiseau), XIII. 286
Tabulae Regiomontanae (of Bessel), XIII. 277
Tangent, III. 59 n, 68 n
Tartars, Tartar astronomy, III. 63
Tebbutt’s comet, XIII, 305
Telescope, III. 67; VI. 118-124, 134; VII. 138; VIII. 152-155; IX. 168; X. 207, 213, 218; XII. 251, 252-258, 260, 262, 271; XIII. 274, 300, 301, 306, 310, 317
Theoria Motus (of Gauss), XIII. 276
Theoria Motuum Lunae (of Euler), XI. 233
Théorie de la Lune (of Clairaut), XI. 233
Théorie ... des Probabilités (of Laplace), XI. 238
Théorie ... du Système du Monde (of Pontécoulant), XIII. 286
Theory of the Moon (of Mayer), X. 226
Theory of the Universe (of Wright), XII. 258
Thetis, VIII. 160
Three bodies, problem of, XI. 228, 230-233, 235
Tidal friction, XIII. 287, 292, 293, 320
Tides, VI. 130; VII. 150; IX. 189; XI. 228-230, 235, 248; XIII. 287, 292, 293, 297, 320
Time, measurement of, I. 4, 5, 16. See also Calendar, Day, Hour, Month, Week, Year
Titan, VIII. 154
Titania, XII. 255
Toletan Tables, III. 61, 66
Torrid zones, II. 35
Total eclipse, II. 43; VII. 145; X. 205; XIII. 301. See also Eclipses
Transit instrument, X. 218, 225 n
Transit of Mercury, X. 199
Transit of Venus, VIII. 156; X. 202, 205, 224, 227; XIII. 281, 282, 284
Translations, III. 56, 58, 60, 62, 66, 68
Transversals, V. 110 n
Trepidation, III. 58, 62, 68; IV. 84; V. 112
Trigonometry, II. 37 n, 47 n; III. 59 n, 64 n, 68 n; IV. 74
Trivium, III. 65
Tropical year, II. 42
Tuttle’s comet, XIII. 291
Twilight, III. 69
Twinkling of stars, II. 30
Two New Sciences (of Galilei), VI. 133, 134 n; VIII. 152
Tychonic system, V. 105; VI. 127
Umbra (of sun-spots), VI. 124; XII. 268
Uniform acceleration, VI. 133. See also Acceleration
Uraniborg, V. 101
Uranometria Nova Oxoniensis, XIII. 316
Uranus, XII. 253, 254, 255, 267; XIII. 276, 288, 289, 297
Uranus, rotation of, XIII. 297
Uranus, satellites of, XI. 250 n; XII. 255, 267; XIII. 272, 295
Variable stars. See Stars, variable
Variation (of the moon), III. 60; V. 111; VII. 145
Variation of elements or parameters, XI. 233 n, 236, 245
Variations, calculus of, XI. 237 n
Vega, III. 64
Venus, I. 14-16; II. 25, 26, 45, 47, 51; III. 68; IV. 75, 81, 86, 87; V. 98, 100, 103; VI. 121, 123; VII. 136 n, 139, 142, 144; VIII. 154; IX. 181, 185; X. 223, 227; XI. 235, 245; XII. 267, 271; XIII. 282, 297. See also the following headings
Venus, mass of, XI. 235, 248
Venus, phases of, VI. 123, 129
Venus, rotation of, VIII 160; XII. 267; XIII. 297
Venus, transits of. See Transits of Venus
Vernal equinox, I. 11. See also Equinoxes
Vernier, III. 69 n
Vertical, II. 33; X. 221; XIII. 285
Vesta, XIII. 294
Victoria, XIII. 281
Virtual velocities, XI. 237 n
Vortices, VIII. 163; IX. 178, 195
Wave, wave-length (of light) XIII. 299, 300, 302
Weather, prediction of, II. 20; VII. 136
Week, I. 16
Weight, VI. 116, 130; IX. 180
Weights and Measures, Commission on, XI. 237, 238
Whetstone of Witte (of Recorde), V. 95
Winter solstice, I. 11. See also Solstices
Year, I. 3, 4, 16; II. 19-22, 42, 47; III. 66; V. 111
Year, sidereal, II. 42
Year, tropical, II. 42
Zadkiel’s Almanack, I. 18 n
Zenith, II. 33, 35, 36, 46; III, 64; X. 221
Zenith-sector, X. 206
Zodiac, I. 13; X. 224
Zodiac, signs of the, I. 13
Zodiacal constellations, I. 13
Zones of the earth, II. 35, 47

A Short History of Astronomy

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