INDEX.

429

rotation period of, 299, 310 ; satellitesof (see Satellites ) ; apparently withoutsatellites, 347 ; seasons of, 318 ; shadowof, 332; size of, 294, 308 ; size of in-habitants of, 319 ; solar eclipses on,341 ; solar light and heat on, 318;solar system, a miniature, 352; spotsupon, 303; compared with Sun -spots,311,316; equatoreal white spot of, 312,313 ; small black spots of, 313; Sun ,the, its similarity to, 316, 353 ; surfaceof, 297; synodic period of, 129; velocityof, 299 ; of point on equator of, 300;weight of, 292, 295.

The Great Red Spot upon, 305 ; firstannouncement of, 306; colour of,307; first discovery of, 307; earlierdrawings of, 309; present conditionof, 314; rotation period of, 312 ;self-luminosity of, 317; transits ofsatellites and shadows across, 317.

Kepler, the three laws of, 121.

Kirkwood, Prof., on minor planets, 289;on Saturn ’s rings, 374; on the periodsof satellites of Saturn , 386.

Labrador, the cold of, 186 .

Langley, Prof., atmospheric absorption ofsolar radiation ( Preface ); Sun -spots,22 ; the Sun ’s temperature, 45.

Laplace, the movements of Jupiter ’ssatellites, 333; his nebular hypothesis,287; its relation to the satellites ofUranus , 408.

Lassell, Mr., discovery of Saturn 's ring C,368 ; of 2 satellites of Uranus , 399 ; ofthe satellites of Neptune , 415.

Latitude, celestial, 134; highest Arcticattained, 190; length of a degree of, 195.

Ledger, Rev. E., observation of transit ofMercury , 152; naked-eye views ofMercury , 144; daylight observationsof Venus , 162.

Lescarbault, his intra-Mercurial planet,141.

Le Terrier, discovers Neptune , 410, 414;the Sun ’s distance, 13; on intra-Mer-curial planets, 138; on matter betweenMars and Jupiter , 279.

Light, aberration of, 15, 93; bright linesin spectrum of, 25; dark lines, 24;refrangibility of, 23; spectrum of, 23;velocity of, 14, 348; the zodiacal, 44.

Linne, the lunar crater, 78.

Little, Dr., transit of Mercury , 152.

Lockyer, Mr., daylight view of promi-nences, 29; dissociation of chemicalelements, 26; solar eclipse of May 17th,1882, 28.

Lohse, Dr., rotation of Jupiter , 312.

Lomia, the minor planet, 274.

Longitude , celestial, 134; by eclipses ofJupiter ’s satellites, 348; by InDar dis-tances, 93.

Lyman, Prof,, the atmosphere of Venus ,165.

Madan, Mr., names of satellites of Mars ,251.

Madler, diameters of minor planets, 277

Mamhead, a village near Exeter, 368.

Mars , chart of (see frontispiece) ; atmo-sphere of, 246; axis of, 243; canals on,240; cycle and epicycle of, 110. 113;diameter of. 248; and the Sun ’s dis-tance, 16; Mr. Gill’s observations of,17; habitability of, 245; oppositions of,231; orbit of, 230; path of, seen from theEarth , 105; phases of, 242; phenomenaseen from, 253 ; physical features of,234;. polar snows of, 238; red colourof, 242; rotation of, 236 ; satellites of(see Satellites ); seasons of, 244; size of,248; solar heat and light on, 244;southern hemisphere of, 237; spectrumof, 237; synodic period of, 129 ; weightof, 262.

Marth, Mr., phenomena seen from Mars ,253.

Maskelyne, Dr., the Schehallien experi-ment, 208.

Maunder, Mr., articles on Mars , 246.

Maxwell, Prof. J. C., on Saturn ’s rings,373.

Medusa , minor planet, short period of,276.

Mercury , axis of, 145; brilliancy of, com-pared with Venus and Jupiter , 149;corona, seen on the, 153; cycle andepicycle of, 107 ; elongation, greatest,of, 129; habitability of, 149; moun-tains on, 145; naked-eye views of,144; names,early,of, 106; observations,early, of, 143; orbit of, 143; path of,seen from the Earth . 100, 103; solarlight and heat on, 146; spectroscopicobservations of, 153; synodic periodof, 129; transits of, in May and Novem-ber, 126; transits of, list of, 150; phe-nomena seen in, 151.

Meteorites, orbits of, 424; swarms of, nearthe Sun , 44.

Mendon, observatory of, solar photo-graphy at, 41.

Michell, Rev. Jn., inventor of the torsion-balance, 209.

Milton, references in, to cycles andepicycles. 98; to the Eartfi, 197; toVenus , 106, 155.

Millosevich, diameters of minor planets,278.

Minor planets (see Planets , Minor).

Moon , the, acceleration of, secular, 225;albedo of, 163; the Alps and Apennines of, 72; atmosphere of, 79; attractionof Sun and Earth upon, 57; the calen-dar, its relation to, 95; celestial sceneryof, 80; centre of gravity of and of theEarth , 54; its concave orbit, 58. 349;cones upon, 76 ; Copernicus , the moun-tain, 71 ; craters of the Moon , 75; itsdistance from the Earth , 50; Easter ,its relation to, 95; Earth , the, seenfrom, 80; eclipses of, 82; eclipsescaused by, 87; their frequency, 89;health, its relation to, 96; Hyginus ,