change of shape of, 383;
decrease of, 385;
enormous number of, 382;
historical records, 383;
length of stream of, 387;
Le Verrier, and the cause of their introduction into the solar
system, 388;
meteor shoal of, 382;
periodic return of, 382;
their connection with comets and Professor, Schiaparelli, 388

Leonis g, value of velocity of, 484

Leverage by equatorial protuberance, 498

Le Verrier, and Mars, 214;
and the discovery of Neptune, 324-332;
and the introduction of the Leonids into the solar system, 388;
and the weight of Mercury, 349

Lexell's comet, 370

Libration, 84

Lick Observatory, 16

Light, aberration of, 503-512;
velocity of, 261, 262, 265, 505, 512

Linne, 87, 94

Lion, the, 420, 421

Little Bear, the, 412

Little Dog, the, 420

Livy, and meteorites, 393

Lloyd, Provost, 407

Lockyer, Sir Norman, and Betelgeuze, 482;
and solar light, 52

London, tides at, 538

Louvain, F. Terby, and Titan, 295

Lowell, Mr., and Mercury, 165

Lunar tides, 548, 549

Lyra, motion of solar system towards, 459

Lyre, the, 424;
Nebula in, 469

Lyrids, the, 400

M

Maedler, and the lunar craters, 88, 90, 91

Magellanic clouds, 463

Magnesium, colour of flame from, 46;
in the Sun, 50

Magnetism, connection with Sun spots, 42

Manganese in the Sun, 50

Maraldi, and the rings of Saturn, 279

Mare crisium, 83;
foecunditatis, 83;
humorum, 83;
imbrium, 83, 98;
nectaris 83;
nubium, 83;
serenitatis, 83;
tranquillitatis, 83;
vaporum, 83

Mars, ancient study of, 6;
appearance of, through the telescope, 218;
atmosphere of, 222;
axial rotation of, 558;
canals on, 220;
density of, 558;
diameter of, 558;
distance, from the Earth of, 213;
distance from the Sun of, 213, 558;
gravitation on, 225;
Le Verrier's discovery of, 214;
life improbable on, 224;
marking on, 218;
movements of, 211-213;
opposition of, 209-211;
orbit of, 116, 209, 210, 213;
orbit of, and the laws of Kepler, 209;
parallax (1877), and Dr. D. Gill, 214;
periodic time of, 558;
a planet or "wanderer," 111;
"Polar Caps" on, 218, 219;
proximity to the Earth of, 110;
rising and setting of, 209;
rotation of, 218;
satellites of, 225-228, 558;
size of compared with other planets, 116, 216;
tides on, 551;
water and ice on, 219, 224

Maximilian, Emperor, 393

Mayer, Tobias, and Uranus, 312

Measurement of