aphical sketch, 11-14;
sun's motion in space, 15, 39, 425;
revolutions of double stars, 18, 442;
structure of Milky Way, 19-21, 423;
nature of nebulae, 21-26, 401;
results of his observations, 25;
centre of sidereal system, 40;
theory of the sun, 54-56, 70;
asteroids, 75;
discoveries of Saturnian and Uranian satellites, 84, 87, 110;
comet of 1811, 99;
reflecting telescopes, 109-111;
sun-spots and weather, 129;
transit of Mercury, 244;
refraction in Venus, 252;
lunar volcanoes, 266;
terrestrial affinity of Mars, 274;
Jovian trade-winds, 289;
rotation of Jupiter's satellites, 292;
ring of Saturn, 298;
rotation of Saturn, 302;
origin of comets, 369;
stellar photometry, 420

Herz, comets' tails, 348

Hevelius, "Mira" Ceti, 10;
contraction of comets, 92;
granular structure of comet, 362

Higgs, photographs of solar spectrum, 211, 214

Hind, solar flames, 70;
Iris and Flora discovered by, 77;
distortion of Biela's comet, 96;
transit of a comet, 101;
earth in a comet's tail, 326;
comets of 1843 and 1880, 349;
Schmidt's comet, 363;
new star, 392;
variable nebula, 403

Hirn, solar temperature, 220;
resistance in space, 348

Hodgson, outburst on the sun, 160

Hoeffler, star-drift in Ursa Major, 426

Hoek, cometary systems, 362

Holden, Uranian satellites, 87;
eclipse expedition, 180;
coronal extensions, 186;
solar rotation, 203;
transit of Mercury, 245;
intra-Mercurian planets, 250;
drawing of Venus, 252;
lunar photographs, 268;
canals on Mars, 279;
surface of Mars, 281;
transits of Jupiter's satellites, 292;
markings on Uranus, 304;
disintegration of comet, 362;
colours of double stars, 374;
Nova Aurigae, 398;
Orion and Trifid nebulae, 403, 404;
director of Lick Observatory, 435

Holden and Schaeberle, observations of nebulae, 433

Holmes, discovery of a comet, 337

Homann, solar translation, 406

Hooke, solar translation, 10;
stellar parallax, 16;
repulsive action on comets, 102 _note_;
automatic movement of telescopes, 120;
spots on Mars, 274, 275

Hopkins, solidity of the earth, 257

Horrebow, sun-spot periodicity, 125;
satellite of Venus, 256

Hough, G. W., red spot on Jupiter, 295, 430;
observations of double stars, 419

Ho