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Astronomy

INDEX

Reading edition

A

Aberration of light, discovered, 18; a proof of the earth’s revolution, 57; of meteor-radiants, 396

Aboul Wefa, the moon’s variation, 5

Acceleration, 152

Achromatic lens, 177

Adams, 449; discovery of Neptune, 32, 349; orbit of November meteors, 393

Aerolites. See Meteorites

Airy, reduction of Greenwich observations, 19; search for Neptune, 32

Albategnius, movement of the sun’s apogee, 5

Albedo of Mercury, 274; of Venus, 278; of the earth, 289; of the moon, 290; of Mars, 298, 334; of asteroids, 312; of Jupiter, 320; of Jupiter’s satellites, 330, 332; of Saturn, 334; of rings, 338; of Titan, 342; of Uranus, 345; of Neptune, 349

Alcor, 402

Alcyone, 499–502

Aldebaran, 403, 404, 407, 415, 421, 423, 427

Algol, 407, 415, 453, 457, 469–474

Almagest, 4, 6

Al-Mamûm’s school of astronomy at Baghdad, 5

Alphard, 409, 415

Alphonsine tables, 6

Al-Sûfi, description of the stars, 5; Alphard, red, 415; Algol, red, 472

Altair, 404, 427

Altazimuth, 184, 202

Altitude, 65

Amplitude, 66

Anderson, Dr., discovery of new star, 489

Andromeda nebula, 409, 529–532

Andromedæ, Gamma, 412, 417

— Nova, 489, 491

Andromede meteor-showers, 393, 394

Angelot, lunar volcanic action, 293

Annular eclipse, 113

— nebulæ, 526, 527

Antares, 404, 415

Anthelmus, new star, 484

Antlia, 468

Aphelion, 75

Apogee, 89

Apse Line, 75

Aquilæ, Eta, 467

Arago, nature of meteorites, 392; parallax of 61 Cygni, 422

Arc of meridian, 130

Arcturus, 403, 405, 406, 415, 423, 427

Argelander, solar translation, 28; survey of the heavens, 38; comet of 1811, 357; estimate of stars of ninth magnitude, 541

Argo Nebula, 522, 523, 549

— Eta, 462–464

Argon, not a solar element, 250; peculiar qualities, 255; found in meteorites, 389

Aries, first point of, 67

Aristarchus, heliocentric system, 4

Aristotle, description of a comet, 358

Asteroids, position in solar system, 229, 230, 310; discoveries, 311, 314; diameters, 312, 315; computation of orbits, 314; numbers and joint mass, 315; 565distribution, 316; groups, 317; origin, 318

Asterope, 498, 499

Astronomy, Greek, 3, 4; Arab, 4–6; Tartar, 5; of the Invisible, 31; gravitational, 11, 33; spectroscopic, 33–36; photographic, 36–38

Astrophysics, foundation of, 36

Atmosphere, of the sun, 240, 271; of Mercury, 277; of Venus, 278, 279; of the earth, 286, 313; of the moon, 294, 313; of Mars, 299, 307; of Vesta, 312–313; presence dependant upon mass, 313; of Jupiter, 326; of Uranus, 345

Atmospheric refraction, 52

Augmentation of moon’s diameter, 144

Aurigæ Beta, 404, 454, 456, 457

— New Star, 489

Auroræ, magnetic relations, 17, 288

Auwers’ reduction of Bradley’s observations, 19; proper motion of Sirius, 437

Azimuth, 65

B

Babinet, rarity of cometary matter, 366

Baden-Powell, Sir George, eclipse-expedition, 259; coronal photographs, 271

Bailey, Prof., 441, 464, 511, 513, 539

Ball, Sir Robert, 422, 433

Barnard, Prof., photograph of corona of January 1, 1889, 268–9; effect of totality, 270; zodiacal counterglow, 272; photograph of eclipsed moon, 296; drawing of Mars, 302; seas of Mars, 306; measurements of asteroids, 312; markings on Jupiter’s satellites, 330; discovery of fifth satellite, 331; measures of Saturn, 335; of ring-system, 330; disappearance of rings, 337; eclipse of Japetus, 338; compression of Uranus, 343, 344; Encke’s comet, 366; comet-photographs, 378–381; Swift’s comet, 383; Nova in Auriga, 494; Alcyone, 500; curved nebulosity stretching over constellation of Orion, 520; annular nebulæ, 526; stars in streams, 551; vacancies in the Milky Way, 554

Base line, 131

Baxendell, 484

Bayer, 404, 529

Behrmann, 400, 433, 541

Bellatrix, 408

Bélopolsky, spectrographic determination of Jupiter’s rotation, 325; absolute velocity of 61 Cygni, 427; spectroscopic examination of Castor, 451; observation of Delta Cephei, 456; Beta Lyræ, 466–467

Berberich, variability of Encke’s comet, 360

Berson, aeronautic ascent, 286

Bessel, Fundamenta Astronomiæ, 19; astronomy of the invisible, 31, 32; measurement of the Pleiades, 37; Halley’s comet, 355; comet of 1807, 362; Epsilon Lyræ, 411

Betelgeuse, 404, 408, 415, 427

Bianchi, 459

Bianchini, rotation of Venus, 280

Biela, discovery of a comet, 365

Bigelow, theory of Zodiacal Light, 272

Binary stars, 431

Biot, meteoric fall, 387

Bird, quadrants, 19, 20

“Bird, Red,” 415

Birmingham, 417, 485, 486

“Blaze Star,” 485, 487

Bliss, astronomer-royal, 19

Bode’s law, 145, 232, 311, 317, 349

Boeddicker, Dr., heat-phases of eclipsed moon, 295

Bolometer, 226, 239

Bompas, 430

Bond, W. C., discoveries of Hyperion and of Saturn’s dusky ring, 25, 336, 341; celestial photography, 36, 37; the great nebula, 530

Bradley, discoveries of aberration and nutation, 18, 20; reduction of his observations, 19; Saturn’s rings, 337; the distance of stars, 419–420; Gamma Virginis, 445–446

Brahé, Tycho, the moon’s variation, 5; career, 8; scheme of the celestial movements, 9

Bredichin, theory of comets’ tails, 369, 370. (See also Tycho.)

Brenner, ashen light of Venus, 279; rotation of Venus, 280

Brightest stars, 403, 404, 546

Brinkley, 422

British catalogue, 15, 16

Brooks’ cometary discoveries, 365, 371, 380

566Bunsen, foundation of spectrum analysis, 33

Burnham, 433, 437, 441, 448, 509

C

Calcium, represented in Fraunhofer spectrum, 230; in chromospheric and prominence-spectra, 258, 261, 262

Calendar, 86

Callandreau, capture of comets, 372

Campbell, Prof., spectrum of Mars, 306; mountains on, 307

Canals of Mars, 301–305

Cancri, S., 474

— Zeta, 439, 440

Canis Majoris, R, 473

Canopus, 403

Capella, 403, 406, 415, 427

Capricornus, 411

Capture-theory of comets, 372

Carbon in sun, 242, 250; in comets, 368; in meteorites, 389

Cardinal points, 51

Carrington, sun-spot zones, 247; sun’s rotation, 248, 249

Casey, 433

Cassegrain telescope, 180

Cassini, rotation of Venus, 280; red spot on Jupiter, 323; division of Saturn’s rings, 336; discoveries of Saturnian satellites, 341

Cassiopeia, Chair of, 405, 481, 549

Cassiopeiæ, Eta, 413, 450

Castor, 404, 406, 413, 450, 451

Catalogues of stars, 70

Celoria, 433, 442, 540

Centauri, Alpha, 410, 413, 422, 440, 441

— Omega, 512, 513, 516, 539

— R, 478

Cephii Delta, 417, 456, 466

— U, 474

Ceraski, luminous night-clouds, 286; discovery of U Cephei, 474

Ceres, discovery, 311; diameter, 312

Cerulli, rotation of Venus, 280

Ceti, Mira, 458

Challis, search for Neptune, 32

Chandler, 462, 472, 476

Charlois, asteroidal discoveries, 314

Chemistry, universal, 35, 36; solar, 250, 255; of prominences, 256; of chromosphere, 258; of comets, 368, 370, 384; of meteorites, 389

Chromosphere, 253, 258

Chronograph, 175

Chronometer, 175

Circle, meridian, 198; transit, 198; position, 208

Circumpolar stars, 46

Clairaut, verification of Newton’s law, 11; calculation of Halley’s comet, 16

Clark, Alvan, great refractors, 26

— — G., detection of the companion of Sirius, 26, 437

Clarke, dimensions of earth, 134

Clausen, groups of comets, 361

Clerke, Agnes, appearance of R Sculptoris, 416; examination of Pickering’s catalogue of stars, 541; estimate of total light of stars to magnitude 9½, 543

Clock, astronomical, 174; driving, 186; sidereal, 68

Clock stars, 82

Clusters, globular, 507–517; irregular, 497–507

“Coal sacks” in Milky Way, 554

Coelostat, 194

Collimation of transit instrument, 200

Collimator of spectroscope, 215

Colours of double stars, 417

Comæ Berenices, 434, 502, 549

Comet, Aristotle’s, 352, 353; of 1743, 354; Newton’s, 355; of 1843, 358, 359; Tebbutt’s, 362, 368; Donati’s, 362, 369; Lexell’s, 365, 370, 371; Brooks’, of 1889, 365; of 1893, 380; Winnecke’s, 368, 371, 372; Brorsen’s, 370; Tuttle’s, 372, 393; Wolf’s, 377; Rordame’s, 383; Gale’s, 383; Leonid, 393, 395

— Halley’s, return in 1759, 16, 17; status in solar system, 230, 232; return in 1835, 335, 336; type of tail, 369; a client of Neptune, 371, 372

— Encke’s, disturbed by Mercury, 273; rarefaction, 366; acceleration, 307; exempt from Jupiter’s influence, 371

— of 1811, structure, 356, 357; type of tail, 369; bulk, 383

— of 1843, surprising appearance, 358; conditions of movement, 359

— of 1882, photographs, 38, 361; transit, 359, 361; period, 300; spectrum, 369

567Comet, Biela’s, discovery, 365; duplication, 366; related meteor-swarm, 393, 394

— Wells, spectrum, 368

— photographically detected, 377

Comets, orbits of, 108; periodic, 109; domiciled in solar system, 230, 371, 372; granular nuclei, 353, 379, 384; tenuity, 354, 384; classification by Olbers, 358, 383; groups, 359, 361, 362; disruption, 360, 366, 379; photographs, 361, 377, 380; chemistry, 368, 370, 385; luminous by electricity, 309, 384; lost, 370; short-period, 370, 371; capture by planets, 371, 372, 384; share sun’s translation, 372; meteoric relationships, 384, 393, 394

— tails, multiple, 354, 355, 361, 377; electrical theory, 357, 369, 383; passage of the earth through, 302, 365; three types, 369; structure shown in photographs, 377, 383

Common, Dr., 25, 510, 520, 532, 534

Conjunctions, 99, 103

Constant of aberration, 59

Constellations, 45

Contacts in eclipse, 114

Copeland, Dr., cometary spectra, 368; Nova in Auriga, 490; helium, 519

Copernicus, residence in Italy, 7; theory of planetary revolutions, 8, 9, 418

Cornelius, Gamma, 479

Corona Borealis, Eta, 437

— — Gamma, 442

— solar, 253; compound nature of light, 202; daylight photography, 267; periodicity of type, 208, 270, 272; photographs, 268–271; rarefaction, 271, 361; connexion with Zodiacal Light, 272, 273

Coronium, 238, 262

Co-tidal lines, 165

Coudé telescope, 27, 296

Crateris, R, 478

Craters, lunar, 292, 307

Crema meteorite, 386

Cross, Southern, 410, 416, 549

Crosswires, 195, 199, 206

Crucis, Kappa, 506

Cygni Beta, 417

— Chi, 460

— (34), 482

— (61), 422, 427

— Rho, new star near, 486

— Y, 474

Cygnus, 407

D

D’Alembert, verification of Newton’s Law, 11

D’Arrest, asteroidal orbits, 316; comet, 371, 372

Darwin, G. H., tidal friction, 236; origin of the moon, 236, 237; density of Saturn, 333

Day and night, 52

— apparent solar, 79; mean solar, 79

Declination, 66

De la Rue, celestial photography, 36, 295

Delphini, Beta, 435

— Gamma, 412

Deneb, 407

Denning, rotation of Saturn, 334; discovery of a comet, 370; August meteors, 391; meteor-radiants, 395, 396

Density of earth, 160

Deslandres, prominence-photography, 261; photographs of the sun as a bright-line star, 262; daylight coronal photography, 267; eclipse of 1893, 270; rotation of Jupiter, 325

Dewar, atmospheric resistance to meteorites, 388

Dhurmsala meteorite, 389

Diameters, determination of, 141

Diamonds in meteorites, 390

Diffraction grating, 216

Direct movement, 89

— vision spectroscope, 216

Distance of the stars, 417

Doberck, Dr., 441, 442, 447, 450, 451

Dollond, invention of achromatic lenses, 21

Donati, discovery of a comet, 362; cometary spectrum, 368

Double-slit method of photography, 261

Draconis, Gamma, 419, 420

Draper, Henry, photograph of the moon, 36

Dubjago, 435

Dunér, spectroscopic measurement of the sun’s rotation, 249; R Hydræ, 462; Y Cygni, 474; 568Z Herculis, 475

E

Earth, shape of, 41, 134; size of, 42, 134; rotation of, 47, 48, 283, 284; revolution of, 57; orbit of, 59, 72; varying speed of, 75; real path of, 77; shadow of, 110; mass of, 159; internal heat, 284, 285; age, 285; atmosphere, 286, 289; magnetic relations, 287, 288

Easton, 532, 548

Eccentricity of ellipse, 74

Eclipse, solar, of 1842, 253; of 1860, 254; of 1868, 254; of 1870, 258; of 1896, 259, 271; of 1882, 260, 268; of 1878, 268; of 1889, 268, 270; of 1893, 270

Eclipses, lunar, 111; partial, 111, 114; annular, 113; magnitude of, 113; total of sun, 113; duration of solar, 115; number of in a year, 118; recurrence of, 119; of satellites, 121; varieties of lunar, 295; of Jupiter’s satellites, 329; of Saturn’s, 342

Ecliptic, 56

— obliquity of, 61

Electrical theory of photospheric radiance, 242; of corona, 271, 272; of comets’ tails, 357, 358, 383; of cometary luminosity, 369, 384

Electra, 498, 499

Elements of an orbit, 106

Elevating floor, 193

Elger, lunar maria, 290

Elkin, Dr., transit of great comet, 359; meteorograph, 396; measurements, 421–423, 425, 433, 438

Ellipse, properties of, 73; eccentricity of, 74; foci of, 74; to draw an, 74

Elliptical nebulæ, 529–533

Elongations, 99

Encke, discovery of a comet, 366; resisting medium, 367

Enoch, Book of, 404

Equation of time, 79

Equator, terrestrial, 50; celestial, 66

Equatorial coudé, 193

Equatorial telescope, 185

Equinoxes, 55; precession of, 69, 167, 170

Equulei, Delta, 433

Eridani, (40), 444

Espin, 460, 482, 494

Establishment of a port, 165

Ether of space, 546

Euler, lunar theory, 11

Evening star, 100

Evolution, of solar system, 235, 310; of terrestrial, 236, 237, 283

Eye-pieces, 182

F

Fabricius, 458, 483

Fabry, cometary orbits, 372

Faculæ, associated with sun-spots, 244; rotation, 249; photographed, 262

Faye, planetary origin, 235, 350; water on Mars, 299

Fényi, solar eruptions, 259, 260

Finder of telescope, 187

First Point of Aries, 67

Fixed stars, 45, 423

Flammarion, rotation of Venus, 280; canals of Mars, 304; condition of Mars, 309

Flamsteed, first astronomer-royal, 15; stellar parallax, 18; Flamsteed’s star, 461

Fleming, Mrs., 460, 465, 489, 494–496

Fletcher, 447

Fomalhaut, 404

Fontana, pseudo-satellite of Venus, 282

Forbes, ultra-Neptunian planets, 231

Foucault’s pendulum, 48–50

Fraunhofer, improvement of telescopes, 21; solar spectrum mapped by, 34

Fraunhofer lines, 34, 249, 259, 271; interpreted, 35, 250; reflected in spectrum of Uranus, 346; in spectra of comets, 368

Fritsche, 433

Frost, spectrograph of Uranus, 346

Froley, 434

G

Galaxy. See Milky Way

Galileo, telescopic observations, 9; double-star method of parallaxes, 28, 418

Gaseous nebula, 517

Gemini, star cluster in, 504

Geminorum, Zeta, 468

Gemma, Cornelius, 479

Gemmill, 554

569Geocentric positions, 70

Geodesy, 129

Gill, Dr., photographs of comet of 1882, 38, 361; parallax of Sirius, 421; parallax and velocity, Lacaille, 424; Omega Centauri, 513

Glasenapp, 433–434

Gledhill, red spot on Jupiter, 323

Globular clusters, 507

Gnomon, 125

Goodricke, 465, 466, 470

Gould, Dr., photographic measurement of the Pleiades, 37; planetary photography, 327; Pi Gruis and R Sculptoris, 416; Kappa Crucis, 506; stars in Southern Hemisphere, 541; belt of stars intersecting the Milky Way, 551

Graduated circles, 171

Grating spectroscope, 216

Gravity, surface, on Mercury, 274; on Venus, 278; on the moon, 293; on Mars, 298; on Saturn, 335; on Uranus, 345; on Neptune, 349

Gravitation, laws of, 153; universal, 156

Greenwich observations, 15, 19, 20

Groombridge, 424

Grosch, corona of 1867, 268

Grubb, Sir Howard, great refractors, 26

— Thomas, Melbourne reflecting telescope, 24

Guinand, optical glass, 21

Gully, Ludovic, 488

Gylden, 423

Gyroscope, 50

H

Hadley, improvement of reflecting telescopes, 21

Hale, spectrographs of prominences, 261; calcium light pictures of sun and surroundings, 262; double-slit method of coronal photography, 267

Hall, Prof. Asaph, discovery of the moons of Mars, 26, 309; rotation of Saturn, 334

— Chester More, invention of achromatic lenses, 20

— Maxwell, 472

Halley, law of gravitation, 10; acceleration of the moon, 12; astronomer-royal, 16; comet calculated by, 16; transits of Venus, 17; discovery of proper motion in stars, 423; discovery of the star cluster in Hercules, 507

Harding, 548

Hartwig, 488

Harvest moon, 95

Heavens, diurnal motion of, 45

Heis, 400, 401, 541

Heliocentric positions, 70

Heliometer, 209

Helium, a chromospheric element, 255, 258; extracted from clevite, 255

Helmholtz, maintenance of sun’s heat, 234; past duration of sunlight, 285

Hencke, asteroidal discoveries, 314

Henderson, 422, 447

Henry’s belts of Uranus, 343

Hepidannus, 479

Herculis, Alpha, 413, 416

— Zeta, 435

— Z, 475

Herschel, Sir John, mathematical analysis at Cambridge, 15; observations of nebulæ, 23, 31; Magellanic clouds, 30, 31; survey of the heavens, 31; photography of sun-spots, 36; telescope, 180; great spot-group in 1837, 244; cyclonic theory of sun-spots, 252; Halley’s comet, 355; comet of 1843, 358; Biela’s comet, 365; red stars, 416; orbit of Gamma Virginis, 446; Kappa Crucis, 506; 2 Messier, 511–512; 22 Messier, 514; nebula round Eta Argus, 522–523; 30 Doradus, 524; the trifid nebula, Sagittarius, 525; planetary nebula, 528–529; the Nubecula Major, 534–536; Milky Way, crossed by zone of large stars, 552; observations in the Southern Hemisphere, 554

— Sir William, the sun’s translation, 19, 28; reflecting telescopes, 21–23; discovery of Uranus, 21, 22; of binary stars, 28; comprehensive designs, 27, 29; nebular theory, 30, 35; rotation of Jupiter’s satellites, 331; variability of Japetus, 341; discovery of Uranian moons, 347; binary stars, 419, 431; motion real and apparent, 428; Zeta Herculis, 435; Xi Ursæ Majoris, 440; 70 Ophiuchi, 441; 5 Messier, 510

Hevelius, 459, 462, 484

570Hind, 433, 474, 482, 484

Hipparchus, construction of a star catalogue, 3; mathematical standpoint, 4

Holden, Prof., solar rotation, 249; names of asteroids, 315; helical nebulæ, 528

Holmes, discovery of a comet, 379

Holwarda, Phocylides, 458

Hooke, law of gravitation, 10; observations of Greek letter Draconis, 18; Gamma Arietis, 412; parallax of Gamma Draconis, 419–420

Horizon, visible, 41; sensible, 44; celestial, 44; rational, 44

Horrebow, satellite of Venus, 282

Hour circle, 186

Howlett, depression of sun-spot umbræ, 251

Huggins, Dr., stellar and nebular spectra, 35; photographed, 37; observations of prominences, 255; daylight coronal photography, 267; prismatic occultation of a star, 294; spectrum of Mars, 306; of Jupiter, 326; of Uranus, 345; of Winnecke’s comet, 368; spectrograph of Tebbutt’s comet, 368; measurement of motion in the line of sight, 426; spectroscopic examination of new star, 493; spectroscopic examination of the “fish-mouth” nebula, 518; discovery of gaseous spectrum, 528

Humboldt, meteoric shower of 1799, 392; temporary star of 1572, 479–481

Hussey, cometary forms, 380; photograph of Rordame’s comet, 383

Huygens, 417, 517

Hyades, 407, 549

Hydræ, R, 462

Hydrogen, ultra-violet spectrum in stars, 37; a gaseous metal, 250; a constituent of prominences and chromosphere, 255, 258; velocity of molecules, 313; free in atmospheres of Uranus and Neptune, 346, 349; assumed constituent of comets’ tails, 369, 370

Hypothesis of external galaxies, 546

I

Infinity of Space, 546

J

Jacob, 433, 447

Jacoby, measures of photographs, 37

Janssen, photograph of the sun, 243; spectroscopic method of prominence-observation, 254; double-slit method, 261

Japetus, remarkable eclipse, 338; variability, 341; plane of orbit, 342

Jesse, luminous night-clouds, 286

Job, Book of, 404

Johnson, 450

Juno, discovery, 311; diameter and albedo, 312, 316; a twin of Clotho, 317

Jupiter, long inequality, 12, 17; disturbance of Halley’s comet, 16; influence upon asteroidal distribution, 316–318; mass and figure, 318; rotation, 318, 325, 326; density, 319, 326; reflective power, 320; belts and streamers, 321, 322, 326; spots, 323, 325; photographs, 327; disturbance of comets, 371

Jupiter’s satellites, Galilean quartette, 9, 327, 328; transits, 329; constitution, 330; fifth satellite, 331, 332

K

Kapteyn, 422, 556, 561–563

Keeler, drawings of Jupiter, 321; description of markings, 322; spectroscopic test of the meteoric constitution of Saturn’s rings, 339; measuring velocities of nebula in line of sight, 428; spectra of the Orion nebula, 519–520

Kelvin, Lord, subterranean temperature, 285

Kepler’s Laws, 10, 155, 339, 417

Kirch, 460, 470, 510

Kirchhoff, spectrum analysis, 33; Fraunhofer’s lines, 34

Kirkwood, distribution of asteroids, 316, 317; divisions in Saturn’s rings, 338

Kleiber, number of shooting stars, 390

Koch, 461

571Kreutz, relations of great southern comets, 360

Krüger, 442

L

Lacaille, southern nebulæ, 30

Lagrange, verified principle of gravitation, 11; stability of solar system, 13

Lajoye, 488

Lamp, fate of Brorsen’s comet, 370

Lane’s law, 242

Langley, solar radiation, 238, 239; spectroscopic effects of sun’s rotation, 249; temperature of the moon, 294; fireball, 386

Laplace, verified Newton’s law, 11; lunar acceleration, 12; Mécanique Céleste, 13, 14; nebular hypothesis, 235

Lassell, large reflectors, 24; discoveries of Hyperion, Ariel, and Umbriel, 24, 341, 347; Saturn’s dark ring, 336

Latitude, terrestrial, 50, 125; celestial, 68; of sun, 77; geocentric, 135; geographical, 135; astronomical, 136; variation of, 136

Leland, Miss, 511

Leonid meteors, 391–395

Leonis, Gamma, 413

— R, 461

Lepaute, Madame, computation of Halley’s comet, 16

Leverrier, discovery of Neptune, 32; intra-Mercurian planet, 232; mass of asteroids, 315; orbit of November meteors, 395

Lewis, 426

Libræ, Delta, 473

Librations, of Mercury, 277; of Venus, 281; of the moon, 93, 289

Lick observatory, 25, 26

Light-equation, 329

“Light journey,” 420

Limited number of visible stars, 538, 545

Limiting apertures, 212

Lippershey, inventor of the telescope, 9

Lockyer, spectroscopic observations at the sun’s limb, 254; classification of prominences, 250; solar tornadoes, 259

Loewy, Coudé telescope, 27; lunar photography, 296

Longitude, terrestrial, 50, 125; celestial, 68

Lowell, rotation of Mercury, 277; observations of Venus, 279, 281; lakes of Mars, 301, 302; relation to canals, 302–304

Luminous night-clouds, 286

Lunar distances, 129

— ecliptic limit, 112

Lyncis (12), 450

Lyra, annular nebula in, 526

Lyræ, Beta, 465

Lyraid meteors, 393, 395

M

Maclear, 464

Mädler, search for Martian moons, 309; compression of Uranus, 343

Madrid meteorite, 385

Magellanic clouds, 30, 534–537

Magnetism, terrestrial, 287, 288

Magnitude, of eclipses, 113; of stars, 212

Magnitudes, star, 403, 404

Mann, 433

Maps, 133

Maraldi, 462, 470, 511

Marchand, observations of the Zodiacal Light, 273

Markwick, Col., 547

Mars, phases of, 104; parallax of, 147; a superior planet, 297; seasons, 298, 301, 302; snow-caps, 299, 303, 306; land and water, 299–301, 305, 306; continents, 300, 301; canals, 301, 304; duplication, 301, 305; spectrum, 306; atmosphere, 307, 313; mountains, 307; climate, 308; moons, 309, 310

Marth, Neptune’s satellite, 350

Mascari, rotation of Venus, 280

Maskelyne, astronomer-royal, 19; founded Nautical Almanac, 20; star-motions, 28

Mass, defined, 151; sun, 156; planets, 157; moon, 158; of asteroids, 158; earth, 159; satellites, 159

Maunder, 460, 488, 493

Maxwell, Clerk, constitution of Saturn’s rings, 337, 340

Mayer, Tobias, lunar tables, 11; star-motions, 28

572Mazapil meteorite, 396

Measurement, of earth, 42, 129; of sun’s distance, 146; of binary stars, 208; of planets, 208

Mécanique Céleste, character, 13, 14

Megrez, 402

Mercury, Copernican theory of movements, 8; transit of, 101; phases of, 101; orbit, 273, 274; atmosphere, 274, 275; rotation, 275–277; as an abode of life, 277; capture of Encke’s comet, 372

Meridian, 50; line, 51; arc of, 130; circle, 198; photometer, 214

Merope, 498, 499

Messier (3), 509

— (5), 510

— (11), 506

— (22), 514

— (37), 505

— (51), 533

— (57), 526

— (80), new star in, 485

— (92), 509

— (99), 534

— discoveries of nebulæ, 30

Metonic cycle, 92

Meteoric systems, 231, 390, 391; radiants, 392, 395, 396

Meteorites, falls, 385–387; legal status, 387; velocities, 387, 388, 390; thumb-marks, 388; chemical composition, 389; enclosed diamonds, 390

Meteors, Perseid, 391, 393; Leonid, 391–393; Andromede, 393–394, 396; relations to comets, 393, 395

Micrometer, wire, or pillar, 205; evolution of, 207

Michell, prevision of binary stars, 28

Midnight sun, 63

Milky Way, 402, 430, 555, 557

— — star streams, 9; disc theory, 29

Minimum deviation, 215

Mira Ceti, 458, 459

Mitchell, 421, 431

Mizar, 402, 411, 455, 457

Molyneux, 419, 420

Montanari, 471

Month, 91

Moon, acceleration, 12; contumax sidus, 16; observations, 19; apparent motion of, 87; orbit of, 88, 94; phases of, 89; sidereal period of, 89; synodic period of, 91; rotation of, 92; librations of, 93; harvest, 95; high and low, 97; shadow of, 115; distance of, 143; size of, 144; mass of, 158; possible disintegration, 233; origin, 236, 237; rotation, 289; cones and craters, 290, 292, 293; rays and rills, 293; absence of air and water, 294, 313; temperature, 294, 295; eclipses, 295; photography, 295–297

Morning star, 100

Müller, surface of Mercury, 275; photometry of asteroids, 312; albedo of Jupiter, 320; of Saturn, 334; of Neptune, 349

Muscæ, R, 468

N

Nadir, 45

Nasir Eddin, planetary tables, 5

Nasmyth, conjunction of Mercury and Venus, 278

Nearest fixed stars, 417

Nebula, Orion, 23, 25, 30

Nebulæ, structure, 23; spiral, 24; photographs, 23, 25; first discoveries, 29, 30; status, 30, 31; gaseous nature, 30, 35; annular, 526, 527; elliptical, 529, 533; gaseous, 517–524; planetary, 527–529; spiral, 533, 534

Nebular hypothesis, 30, 35, 235, 530

Nebulous stars, 529

Neptune, discovery, 32, 229; distance from the sun, 232; dimensions, 349; compression, 351; retrograde rotation, 351; planets as viewed from, 351, 352; family of comets, 371, 372

Neptune’s satellite, discovery, 24; plane of revolution, 350; precessional disturbance, 351

Newall, 25-inch refractor, 26

Newcomb, Prof., past duration of sunlight, 285; light changes of Ariel, 347; satellite of Neptune, 351; the runaway star, 424; proper motion of Alcyone, 501

New stars, 477–497

Newton, H. A., capture of comets, 372; meteoric cult, 387; daily number of shooting stars, 390

— Sir Isaac, law of gravitation, 10, 11; invention of reflecting telescope, 21; comet of 1680, 355; decay of comets, 366

Newtonian telescope, 179

573Nichol, Dr., 508

Niesten, rotation of Venus, 280; mass of asteroids, 315

Nodes, 94

North polar distance, 66

Nova Andromedæ, 488

— Aurigæ, 489

— Cassiopeiæ, 479

— Cygni, 486

— Ophiuchi, 484

— Serpentarii, 483

— Vulpeculæ, 484

Nubecula Major, 534

— Minor, 535

Number of visible stars, 538–544

Nutation, 169

O

Oases of Mars, 302–305

Object-glass, achromatic, 177; photographic, 195; photo-telescope, 196

Objective prism, 223

Obliquity of ecliptic, 61

Observatories, 191

— Lick, 189, 190, 202

— Nice, 192

— Yerkes, 189

Occultations, 121

— of stars, by the moon, 294; by comets, 366

Olbers, discovery of Pallas and Vesta, 311; origin of asteroids, 311, 316; electrical theory of comets, 357; classification, 358, 383; comet discovered by, 371

Ophiuchi, Nova, 483–485

— (70), 441

— U, 473, 476

Opposition, 103, 105

Orbit, of earth, 72, 76; of moon, 88; elements of a planetary orbit, 106; of binary stars, 432

Orion, 406, 408, 417

— great nebula in, 517–521

Orionis, Alpha (Betelgeuse), 404, 408, 415, 427

— Iota, 414

— Sigma, 414

— Theta, 414

“Owl,” nebula, 528

P

P (34) Cygni, 482

Palisa, discoveries of asteroids, 314

Palitzsch, 470

Pallas, discovery, 311; diameter, 312

Parallax of stars, 419, 420

— diurnal, 140; equatorial horizontal, 140; horizontal, 140; of sun, 146; of Mars, 147

Parmentier, distribution of asteroids, 316

Pegasus, Square of, 409

Pegasi, Kappa, 433

— (85), 434

— U, 469

Pendulum observations, 135; compensated, 174

Penumbra, of earth’s shadow, 111

Percentage of stars in Milky Way, 547, 548

Perigee, 89

Perihelion, 75

Perrotin, rotation of Venus, 280; of Uranus, 343; markings on Uranus, 344

Persei, Beta (Algol). See Algol

Perseid meteors, 391; associated with Tuttle’s comet, 393

Perseus, 407

— star clusters in, 503

Perturbations, 158

Peters, 428

Phases of moon, 89; of Venus, 101; of Mars, 104

Phocylides Holwarda, 458

Photographic telescopes, 194

Photography of nebulæ, 23, 25, 38; of sun-spots, 36, 243, 244; of the moon, 36, 295–297; of stellar spectra, 37; of comets, 38, 354, 377–383; celestial, 194; of spectra, 219, 223; of the eclipsed sun, 254; of the reversing layer, 259; of prominence-spectra, 260; of prominences and faculæ, 261, 262; of the corona, 267, 269–271; planetary, 327; meteoric, 396

Photoheliograph, 197

Photometers, wedge, 213; meridian, 214

Photosphere, visible structure, 242

Piazzi, five-foot circle, 20; discovery of Ceres, 311

Pickering, Prof. E. C., photometric measures of asteroids, 312; photograph of Jupiter, 327; 574the spectrum of Alpha Centauri, 441; the spectrum of Pleione, 498

Pickering, W. H., lunar photographs, 296; mounting of telescopes, 297; lakes and canals of Mars, 301, 304; water area on Mars, 305; star collisions, 495; nebula surrounding Zeta Orionis, 520

Pigott, 467

“Pilgrim star,” 479–482

Planetary nebulæ, 527–529

Planets, apparent movements of, 98; interior and exterior, 98; conjunctions of, 99, 103; phases of, 101, 104; oppositions of, 103; synodic periods of, 107; times of revolution, 107; relative distances of, 144; distances of, 150; terrestrial, 229; giant, 229, 319, 343; trans-Neptunian, 231; intra-Mercurian, 232; decay, 233; comets captured by, 371, 372

— minor. See Asteroids

Pleiades, 404, 407, 497–502, 539, 549

Pleione, 498

“Plough,” 400–402, 405

Plummer, short-period comets, 371; Encke’s, 372

Podmaniczky, Baroness, 488

Pogson, 485

Polar axis, 185

Polaris. See Pole Star

Pole, celestial, 46; terrestrial, 50; movements of, 138

Pole Star, 46, 405, 412, 421, 427

Pollux, 404, 406, 415, 427

Pond, defects of Greenwich quadrant, 19; astronomer-royal, 20

Position, angle, 208; circle, 208

Poynting’s experiment, 160

Præsepe, 502

Precession, of equinoxes, 69; effects of, 170; luni-solar, 169

Prime vertical, 210

Principia, publication, 10, 13; character, 14

Prism, action of, 215; objective, 223

Prismatic camera, 223

— spectroscope, 215

Pritchard, Prof., 422, 424

Proctor, Saturn’s rings, 341; distance of Uranus, 344; Proctor’s chart, 548; stars in streams, 550

Procyon, supposed satellite, 31, 32; order of magnitude, 404; parallax of Procyon, 421; Procyon approaching the Earth, 427

Prominences, solar appendages, 253, 254; spectrum, 254, 256, 258, 260; daylight observations, 254, 255; quiescent and eruptive, 256; periodicity, 257; rapid development, 259; spectral photography, 260, 261

“Proper motions” of stars, 423–431

Ptolemaic system, 3, 4, 6

Q

Quadrature, 105

R

Rambaud, absorption in solar atmosphere, 240; fireball, 380

Ramsay, terrestrial discovery of helium, 255

Ramsden, astronomical circles, 20

Raynard, the sun a nebulous body, 253; future of Saturn’s ring-system, 340; outflows from comets, 380; star streams, 551

Ravené, gravitational disturbance by asteroids, 315

R Centauri, 478

Reading microscope, 172

Recurrence of eclipses, 119

“Red Bird,” 415

Red spot on Jupiter, 323, 324

Red stars, 416

Reduction of observations, 18, 19

Refracting telescope, 176

Refraction, 52

— in Venus, 278

Reflecting telescope, 178

Regression of moon’s nodes, 94

Regulus, 406, 410, 427

Retrogradation, 89, 103

Reversing layer, 249, 258, 271; photographed, 259

Rich and poor regions, 549

Richaud, 440

Rigel, 404, 414, 427

Right ascension, 66

Roberts, Dr., 23, 107, 502, 503, 508, 511, 520, 525–528, 530, 533, 534, 539, 540

575Roberts, A. W., 440, 441, 469

Roche, minimum distance of satellites, 340

Römer, velocity of light, 329

Rosse, Earl of, giant reflector, 24

Roszl, mass of 311 asteroids, 315

Rotation of earth, 47, 48; of moon, 92

Rowland grating, 217

— solar elements, 250

Russell, photograph of Swift’s comet, 377; Kappa Crucis, 506; the “key-hole” nebula, 522; the Magellanic clouds, 536

Rutherfurd, photographs of the moon, 295

S

Sacrobosco, treatise on the sphere, 6

Sagittarii, Zeta, 434

Saros, 120

Satellites, movements of Satellites, 108; masses of Satellites, 159

— discoveries, 9, 23, 25, 26, 309, 347; apportionment, 230; formation checked by tidal friction, 277, 282; planes of revolution, 328, 347, 348, 350; transits, 329, 330, 342; eclipses, 329, 342; variability, 330, 341, 347; rotation, 331, 341, 342, 347

Saturn, density, 333; spectrum, 334; rotation, 334, 339; dimensions, 535

Saturn’s ring-system, dusky member, 25, 336, 338; dimensions, 336; constitution, 337, 339, 340; albedo, 338

Sawyer, U Ophiuchi discovered, 473; variability of R Canis Majoris detected, 473

Schaeberle, photographs of corona of 1893, 270; land and water on Mars, 306

Scheiner, spectra of sun-spots, 251

Schiaparelli, rotation of Mercury, 275; map of Mercury, 277; rotation of Venus, 280, 281; canals of Mars, 301; duplication, 305; climate of Mars, 308; compression of Uranus, 343; comets and meteors, 393; theory of extinction of light, 544

Schiehallion experiment, 161

Schmidt, map of the moon, 290

Schönfeld, 461, 464, 466, 467, 473, 483

Schorr, 442

Schur, 433, 442

Schuster, photograph of eclipsed sun, 268

Schwabe, discovery of sun-spot periodicity, 245

Seasons, 61

Secchi, observations of prominences, 256; spectrum of Uranus, 345

See, Dr., 413, 433–435, 440, 442, 447, 448

Seeliger, photometric measures of Saturn’s rings, 339

Serpentarii, Nova, 483

Sextant, 211

Shackleton, photograph of the reversing layer, 259

Ship, position of, 128

“Sickle” in Leo, 406

Siderostat, 194

Sidgreaves, elevations of chromosphere, 258

Sirius, proper motion, 17, 31; companion, 32; spectrum, 37; size, 403; position, 409; colour, 414; distance, 418, 421; discovery of proper motion, 423; a binary star, 437; comparative magnitude, 438

Smyth, 447, 448, 502, 505, 508

Solar, constant, 239

— diagonal, 183

— eclipses, 113

— ecliptic limit, 118

— System, dominated by gravity, 29; constitution, 229, 232; dimensions, 231; stability, 232; origin, 235, 236

Southern Cross, 410, 416, 549

Shouting, 68, 198

Spectroheliograph, 225

Spectroscope, prismatic, 215; direct vision, 216; grating, 216; Lick star-, 219; Rowland, 217; tele-, 219

Spectroscopic measurements of rotation; the sun, 248; Venus, 281; Saturn, 339

Spectrum, solar, 34, 250; of stars and nebulæ, 35, 37; measurement of, 218; sun-spot, 250, 251; prominence, 254, 256, 261; chromospheric, 258; of Mercury, 275; of Venus, 279; auroral, 288; of Jupiter, 326; of Saturn’s rings, 338; 576of Uranus, 345, 346; of Neptune, 351; of comets, 368

Spherical excess, 133

Spica, 404, 410

Spiral nebulæ, 533, 534

Spoerer, solar rotation, 249

Star of Bethlehem, 101

Star-charting, photographic, 38

— cluster, 17

— spectroscope, 219

— time, 68

Stars, temporary, 3, 8, 477; proper motions of, 17, 19, 28, 425, 427; fixed, 45; circumpolar, 46; diurnal motion of, 46; aberration of, 58; catalogues of, 71; clock, 82; morning and evening, 100; magnitudes, 403, 404; Pole, 405, 412; double, 410; coloured, 416; red, 416; nearest, 417; binary, 431; variable, 458

Stationary points, 103

Stone, mass of Titan, 342

Stoney, G. Johnstone, atmospheres of planets, 313

Stratonoff, sun’s rotation from faculæ, 249

Suess, theory of lunar formations, 292

Sun, translation, 28, 229; apparent movements of, 55, 77; midnight, 63; apparent diameter of, 72; mean, 79; eclipses of, 113; distance of, 146; mass of, 156; maintenance of heat, 234; radiative power, 237–239, 241, 242; temperature, 239, 240; magnitude, 240, 241; luminous surface, 242; spots, 243–249, 251, 252; periodicity, 246; rotation, 247–249; chemistry, 250; theories, 252

Sun-dial, 78

Sun’s motion in space, 428

Sun-spots, observed by Galileo, 9; construction, 243, 251; zones, 245, 247; periodicity, 245, 247; irregular movements, 247–249; spectra, 250–252

Sutton, 553

Swift, Lewis, comet discovered by, 377, 378, 383

Sykora, elevation of spotted areas on the sun, 252

Synodic period, of moon, 91; of planets, 107

T

Tacchini, spectrum of Venus, 279; rotation, 280

Talcott’s latitude method, 124

Tauri, Alpha. See Aldebaran

— Lambda, 473

Tebbutt’s comet, 362, 368

Telescope, invention of, 9; achromatic, 20, 21; reflecting, 21, 24, 25, 178; refracting, 20, 25–27, 176; future improvement, 26, 27, 297; Newtonian, 179; Cassegrain, 180, 181; Herschellian, 180; Skew Cassegrain, 181; magnifying power of, 184; illuminating power of, 184; altazimuth, 184; equatorial, 185; Rosse, 187; Common, 5-foot, 188; Lick, 190; fixed, 194; photographic, 194

Telespectroscope, 219

Tempel, 501

“Temporary stars,” 477–497

Theodolite, 205

Thiele, 435, 447, 451

Thome, comet of 1887, 360

Tidal evolution, 167

Tidal friction, 166; in earth-moon system, 236, 283, 284; on Mercury, 277; effect on satellite-formation, 278, 282; on Venus, 282; on Phobos, 310; on Saturnian satellites, 342

Tides, 162; spring and neap, 164; priming and lagging, 164

Time, apparent, 78; equation of, 79; mean solar, 79; determination of, 82; at different places, 83; Greenwich mean, 83; local, 83; telegraphy, 84; zone, 84; balls, 85

Tisserand, revolutions of Jupiter’s fifth satellite, 331; disturbance of Neptune’s satellite, 351; capture of comets, 372

Todd, Miss M. L., drawing of corona, 268

— Prof., trans-Neptunian planet, 231

Toucani (41), 513

Transit circle, 198–202

— instrument, 202

— of Venus, 101, 148

Triangulation, 53

Troughton, instrumental improvements, 19, 20

Trouvelot, mountains of Venus, 279; rotation, 280

577Twilight, 53

Tycho Brahé, 5, 8, 9, 405, 418, 479, 481, 529

U

Ulugh Beigh, observations at Samarcand, 5

Umbra of earth’s shadow, 111

Uranus, discovery, 22, 229; perturbations, 32, 231; dimensions and markings, 343–345; analogy with Neptune, 343, 351; rotation, 344, 348; spectrum, 345, 346; satellites, 347, 348; comets captured by, 371, 395

Ursa Major, stars in, 400, 401

Ursæ Majoris, Xi, 440

V

Variation of latitude, 136

Variable stars, 458

Vega, 403, 406, 414, 422, 427

Venus, phases observed by Galileo, 9; transits, 17; phases of, 101; transit of, 101, 148; atmosphere, 278, 281, 282; ashen light, 279; spectrum, 279; rotation, 280, 281; imaginary satellite, 282

Vernier, 172

Very, distribution of lunar heat, 295

Vesta, discovery, 311; diameter and brightness, 312; mass, 313

Villarceau, 433

Virginis, Alpha (Spica), 404, 410

— Gamma, 413, 444–450

— Tau, 456

— W, 469

Visible stars, number of, 538–546

Vogel, spectrum of Jupiter, 326; of Uranus, 345; binary or multiple system of Beta Lyræ, 466; diameter of Algol, 472

Volcanic action, terrestrial, 284; lunar, 290, 292

Von Gothard, 465

Vulpeculæ, Nova, 484

— S, 484

W

Ward, 488

Way, Milky, 402, 430, 549, 557

Webb, 528

Wedge, photometer, 213

Weight, defined, 151; of the earth, 160

Wells’ comet, 368

Williams, A. Stanley, rotation of Venus, 280; of Jupiter, 325; photographs of Jupiter, 327; spots on Saturn, 334

Wilson, Alexander, depression of sun-spots, 251

— W. E., temperature of the sun, 240

Winnecke, 422

Winnecke’s comet, 368, 371, 372

Wire micrometer, 205

Wolf, Max, photographic discovery of asteroids, 314; comet discovered by, 377; chart of the Pleiades, 499

Wrublewsky, 434

Y

Year, 85; sidereal, 85; tropical, 85; leap, 86

Yendell, 474

Yerkes, 40-inch refractor, 26, 27

Young, solar eruption, 256; spectrum of chromosphere, 258; reversing layer, 258; spectrum of Venus, 279; brightness of Phobos, 309; belts of Uranus, 343; size of Uranus, 345; the sun and planets, seen from Neptune, 349, 352; 578Andromede meteors, 394

Z

Zenith, 45

— telescope, 210

Zodiac, 60

Zodiacal Light, 272, 273

Zöllner, albedo of Mars, 298, 334; of Jupiter, 320; of Neptune, 349; estimate of sunlight, 543

Zone time, 84

THE END.

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Contents.—The Fairy-Land of Science: How to Enter it; How to Use it; How to Enjoy it.—Sunbeams, and the Work they do.—The Aërial Ocean in which we Live.—A Drop of Water on its Travels.—The Two Great Sculptors, Water and Ice.—The Voices of Nature, and How we Hear them.—The Life of a Primrose.—The History of a Piece of Coal.—Bees in the Hive.—Bees and Flowers.

THROUGH MAGIC GLASSES, and other Lectures. A Sequel to “The Fairy-Land of Science.” Cloth, $1.50.

Contents.—The Magician’s Chamber by Moonlight.—Magic Glasses and How to Use Them.—Fairy Rings and How They are Made.—The Life History of Lichens and Mosses.—The History of a Lava-Stream.—An Hour with the Sun.—An Evening with the Stars.—Little Beings from a Miniature Ocean.—The Dartmoor Ponies.—The Magician’s Dream of Ancient Days.

LIFE AND HER CHILDREN: Glimpses of Animal Life, from the Amœba to the Insects. With over 100 Illustrations. Cloth, $1.50.

Contents.—Life’s Simplest Children; How they Live, and Move, and Build.—How Sponges Live.—The Lasso-Throwers of the Ponds and Oceans.—How Star-Fish Walk and Sea-Urchins Grow.—The Mantle-covered Animals, and How they Live with Heads and without them.—The Outcasts of Animal Life, and the Elastic-ringed Animals by Sea and by Land.—The Mailed Warriors of the Sea, with Ringed Bodies and Jointed Feet.—The Snare-Weavers and their Hunting Relations.—Insect Suckers and Biters which Change their Coats but not their Bodies.—Insect Sippers and Gnawers which Remodel their Bodies within their Coats.—Intelligent Insects with Helpless Children, as illustrated by the Ants.

WINNERS IN LIFE’S RACE; or, The Great Backboned Family. With numerous Illustrations. Cloth, $1.50.

Contents.—The Threshold of Backboned Life.—How the Quaint Old Fishes of Ancient Times have Lived on into Our Day.—The Bony Fish, and How they have Spread over Sea, and Lake, and River.—How the Backboned Animals pass from Water-breathing to Air-breathing, and find their Way out upon the Land.—The Cold-blooded Air-breathers of the Globe in Times both Past and Present.—The Feathered Conquerors of the Air.—Their Wanderings over Sea and Marsh, Desert and Plain.—From Running to Flying, from Mound-laying to Nest-building, from Cry to Song.—The Mammalia or Milk-Givers, the simplest Suckling Mother, the active Pouchbearers, and the Imperfect-toothed Animals.—From the Lower and Small Milk-Givers which find Safety in Concealment, to the Intelligent Apes and Monkeys.—The Large Milk-givers which have conquered the World by Strength and Intelligence.—How the Backboned Animals have returned to the Water, and Large Milk-givers Imitate the Fish.—A Bird’s-eye View of the Rise and Progress of Backboned Life.

A SHORT HISTORY OF NATURAL SCIENCE; and of the Progress of Discovery from the Time of the Greeks to the Present Time. New edition, revised and rearranged. With 77 Illustrations. Cloth, $2.00.

“The work, though mainly intended for children and young persons, may be most advantageously read by many persons of riper age, and may serve to implant in their minds a fuller and clearer conception of ‘the promises, the achievements, and claims of science.’”—Journal of Science.

PRINCIPLES OF GEOLOGY; or, The Modern Changes of the Earth and its Inhabitants, considered as illustrative of Geology. By Sir Charles Lyell, Bart. Illustrated with Maps, Plates, and Woodcuts. Two vols., royal 8vo. Cloth, $8.00.

The “Principles of Geology” may be looked upon with pride not only as a representative of English science, but as without a rival of its kind anywhere. Growing in fullness and accuracy with the growth of experience and observation in every region of the world, the work has incorporated with itself each established discovery, and has been modified by every hypothesis of value which has been brought to bear upon, or been evolved from, the most recent body of facts.

THE AUTOBIOGRAPHY OF THE EARTH. A Popular Account of Geological History. By Rev. H. N. Hutchinson, B. A., F. G. S. With 27 Illustrations. Crown 8vo. Cloth, $1.50.

“A scientific work, divested of technicalities, and put into a bright, narrative form which can not but attract even the most general reader.”—Boston Transcript.

“It is hardly conceivable that the rich results of the science of geology can be so treated as to prove uninteresting to thinking people, be they young or old. When, therefore, we say that Mr. Hutchinson’s book is extremely interesting, no more might be implied than that the author has skillfully used the vast materials at his hand. But Mr. Hutchinson has successfully carried out a difficult design on an admirable plan, and has adhered to that plan throughout. His sketch of historical geology has a genuine continuity.”—Saturday Review.

A REPRINT OF ANNUAL REPORTS AND OTHER PAPERS OF THE GEOLOGY OF THE VIRGINIAS. By the late William Barton Rogers, LL. D., etc., Director of the Geological Survey of Virginia from 1835 to 1841. With numerous Maps, Colored Charts, etc. 12mo. Cloth, $5.00.

NATURAL RESOURCES OF THE UNITED STATES. By Jacob Harris Patton, M. A., Ph. D. 8vo, 523 pages. Cloth, $3.00.

“This portly octavo of over 500 pages is an encyclopedic directory to its subject, and a work of comprehensive scope, exhaustive research, scientific spirit, and good literary form.... Capitalists, investors, railroad projectors, land speculators, and all who need to know the distribution of land values, will find a vast amount of information in this well-arranged work, the contents of which, it is safe to say, could not be found assembled in similar compass elsewhere.”—Boston Literary World.

“As interesting to read as it is valuable to consult. By the employment of fine white paper and large, clear type, the publishers have made it an elegant specimen of the printer’s art.”—New York Sun.

BOOKS BY PROF. G. FREDERICK WRIGHT.

GREENLAND ICEFIELDS, AND LIFE IN THE NORTH ATLANTIC. With a New Discussion of the Causes of the Ice Age. By G. Frederick Wright, D. D., LL. D., F. G. S. A., author of “The Ice Age in North America,” “Man and the Glacial Period,” etc., and Warren Upham, A. M., F. G. S. A., late of the Geological Surveys of New Hampshire, Minnesota, and the United States. With numerous Maps and Illustrations. 12mo. Cloth, $2.00.

The immediate impulse to the preparation of this volume arose in connection with a trip to Greenland by Professor Wright in the summer of 1894 on the steamer Miranda. The work aims to give within moderate limits a comprehensive view of the scenery, the glacial phenomena, the natural history, the people, and the explorations of Greenland. The photographs are all original, and the maps have been prepared to show the latest state of knowledge concerning the region. The volume treats of the ice of the Labrador current, the coast of Labrador, Spitzbergen ice in Davis Strait, the Greenland Eskimos, Europeans in Greenland, explorations of the inland ice, the plants and animals of Greenland, changes of level since the advent of the Glacial period, and includes a summary of the bearing of the facts upon glacial theories. The work is of both popular and scientific interest.

THE ICE AGE IN NORTH AMERICA, and its Bearings upon the Antiquity of Man. With an Appendix on “The Probable Cause of Glaciation,” by Warren Upham, F. G. S. A., Assistant on the Geological Surveys of New Hampshire, Minnesota, and the United States. New and enlarged edition. With 150 Maps and Illustrations. 8vo, 625 pages, and Index. Cloth, $5.00.

“The author has seen with his own eyes the most important phenomena of the Ice age on this continent from Maine to Alaska. In the work itself, elementary description is combined with a broad, scientific, and philosophic method, without abandoning for a moment the purely scientific character. Professor Wright has contrived to give the whole a philosophical direction which lends interest and inspiration to it, and which in the chapters on Man and the Glacial Period rises to something like dramatic intensity.”—The Independent.

MAN AND THE GLACIAL PERIOD. International Scientific Series. With numerous Illustrations. 12mo. Cloth, $1.75.

“The earlier chapters describing glacial action, and the traces of it in North America—especially the defining of its limits, such as the terminal moraine of the great movement itself—are of great interest and value. The maps and diagrams are of much assistance in enabling the reader to grasp the vast extent of the movement.”—London Spectator.

PIONEERS OF SCIENCE IN AMERICA. Sketches of their Lives and Scientific Work. Edited and revised by William Jay Youmans, M. D. With Portraits. 8vo. Cloth, $4.00.

Impelled solely by an enthusiastic love of Nature, and neither asking nor receiving outside aid, these early workers opened the way and initiated the movement through which American science has reached its present commanding position. This book gives some account of these men, their early struggles, their scientific labors, and, whenever possible, something of their personal characteristics. This information, often very difficult to obtain, has been collected from a great variety of sources, with the utmost care to secure accuracy. It is presented in a series of sketches, some fifty in all, each with a single exception accompanied with a well-authenticated portrait.

“Fills a place that needed filling, and is likely to be widely read.”—New York Sun.

“It is certainly a useful and convenient volume, and readable too, if we judge correctly of the degree of accuracy of the whole by critical examination of those cases in which our own knowledge enables us to form an opinion.... In general, it seems to us that the handy volume is specially to be commended for setting in just historical perspective many of the earlier scientists who are neither very generally nor very well known.”—New York Evening Post.

“A wonderfully interesting volume. Many a young man will find it fascinating. The compilation of the book is a work well done, well worth the doing.”—Philadelphia Press.

“One of the most valuable books which we have received.”—Boston Advertiser.

“A book of no little educational value.... An extremely valuable work of reference.”—Boston Beacon.

“A valuable handbook for those whose work runs on these same lines, and is likely to prove of lasting interest to those for whom ‘les documents humain’ are second only to history in importance—nay, are a vital part of history.”—Boston Transcript.

“A biographical history of science in America, noteworthy for its completeness and scope.... All of the sketches are excellently prepared and unusually interesting.”—Chicago Record.

“One of the most valuable contributions to American literature recently made.... The pleasing style in which these sketches are written, the plans taken to secure accuracy, and the information conveyed, combine to give them great value and interest. No better or more inspiring reading could be placed in the hands of an intelligent and aspiring young man.”—New York Christian Work.

“A book whose interest and value are not for to-day or to-morrow, but for indefinite time.”—Rochester Herald.

“It is difficult to imagine a reader of ordinary intelligence who would not be entertained by the book.... Conciseness, exactness, urbanity of tone, and interestingness are the four qualities which chiefly impress the reader of these sketches.”—Buffalo Express.

“Full of interesting and valuable matter.”—The Churchman.

THE ANTHROPOLOGICAL SERIES.

NOW READY.

THE BEGINNINGS OF ART. By Ernst Grosse, Professor of Philosophy in the University of Freiburg. A new volume in the Anthropological Series, edited by Professor Frederick Starr. Illustrated. 12mo. Cloth, $1.75.

“This book can not fail to interest students of every branch of art, while the general reader who will dare to take hold of it will have his mind broadened and enriched beyond what he would conceive a work of many times its dimensions might effect.”—Brooklyn Eagle.

“The volume is clearly written, and should prove a popular exposition of a deeply interesting theme.”—Philadelphia Public Ledger.

WOMAN’S SHARE IN PRIMITIVE CULTURE. By Otis Tufton Mason, A. M., Curator of the Department of Ethnology in the United States National Museum. With numerous Illustrations. 12mo. Cloth, $1.75.

“A most interesting résumé of the revelations which science has made concerning the habits of human beings in primitive times, and especially as to the place, the duties, and the customs of women.”—Philadelphia Inquirer.

THE PYGMIES. By A. de Quatrefages, late Professor of Anthropology at the Museum of Natural History, Paris. With numerous Illustrations. 12mo. Cloth, $1.75.

“Probably no one was better equipped to illustrate the general subject than Quatrefages. While constantly occupied upon the anatomical and osseous phases of his subject, he was none the less well acquainted with what literature and history had to say concerning the pygmies.... This book ought to be in every divinity school in which man as well as God is studied, and from which missionaries go out to convert the human being of reality and not the man of rhetoric and text-books.”—Boston Literary World.

THE BEGINNINGS OF WRITING. By W. J. Hoffman, M. D. With numerous Illustrations. 12mo. Cloth, $1.75.

This interesting book gives a most attractive account of the rude methods employed by primitive man for recording his deeds. The earliest writing consists of pictographs which were traced on stone, wood, bone, skins, and various paperlike substances. Dr. Hoffman shows how the several classes of symbols used in these records are to be interpreted, and traces the growth of conventional signs up to syllabaries and alphabets—the two classes of signs employed by modern peoples.

IN PREPARATION.

THE SOUTH SEA ISLANDERS. By Dr. Schmeltz.

THE ZUÑI. By Frank Hamilton Cushing.

THE AZTECS. By Mrs. Zelia Nuttall.

Recent Volumes of the International Scientific Series.

THE AURORA BOREALIS. By Alfred Angot, Honorary Meteorologist to the Central Meteorological Office of France. With 18 Illustrations. $1.75.

While there have been many monographs in different languages upon various phases of this subject, there has been a want of a convenient and comprehensive survey of the whole field. Professor Angot has cited a few illustrations of each class of phenomena, and, without encumbering his book with a mass of minor details, he presents a picture of the actual state of present knowledge, with a summary both of definite results and of the points demanding additional investigation.

THE EVOLUTION OF THE ART OF MUSIC. By C. Hubert H. Parry, D. C. L., M. A., etc. $1.75.

Dr. Parry’s high rank among modern writers upon music assures to this book a cordial welcome. It was first published as “The Art of Music,” in octavo form. The title of this revised edition has been slightly amplified, with a view of suggesting the intention of the work more effectually.

WHAT IS ELECTRICITY? By John Trowbridge, S. D., Rumford Professor and Lecturer on the Applications of Science to the Useful Arts, Harvard University. Illustrated. $1.50.

Professor Trowbridge’s long experience both as an original investigator and as a teacher imparts a peculiar value to this important work. Finding that no treatise could be recommended which answers the question, What is Electricity? satisfactorily, he has explained in a popular way the electro-magnetic theory of light and heat, and the subject of periodic currents and electric waves, seeking an answer for his titular question in the study of the transformation of energy and a consideration of the hypotheses of movements in the ether.

ICE-WORK, PRESENT AND PAST. By T. G. Bonney, D. Sc., F. R. S., F. S. A., etc., Professor of Geology at University College, London. $1.50.

In his work Professor Bonney has endeavored to give greater prominence to those facts of glacial geology on which all inferences must be founded. After setting forth the facts shown in various regions, he has given the various interpretations which have been proposed, adding his comments and criticisms. He also explains a method by which he believes we can approximate to the temperature at various places during the Glacial epoch, and the different explanations of this general refrigeration are stated and briefly discussed.

MOVEMENT. By E. J. Marey, Member of the Institute and of the Academy of Medicine; Professor at the College of France; Author of “Animal Mechanism.” Translated by Eric Pritchard, M. A. With 200 Illustrations. $1.75.

The present work describes the methods employed in the extended development of photography of moving objects attained in the last few years, and shows the importance of such researches in mechanics and other departments of physics, the fine arts, physiology, and zoölogy, and in regulating the walking or marching of men and the gait of horses.

D. APPLETON AND COMPANY, NEW YORK.

TRANSCRIBER’S NOTES

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475 the diameter of our sun, I find, from the above date, that the the diameter of our sun, I find, from the above data, that the

Typos fixed; non-standard spelling and dialect retained.

Used numbers for footnotes, placing them all at the end of the last chapter.

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