, spectrographic researches, 386

Canopus, remoteness, 37, 417;
spectrum, 416

Capella, spectrum, 373, 383, 384;
a spectroscopic binary, 389

Carbon, material of photosphere, 152;
absorption by, in sun, 212;
in stars, 374

Carbonelle, origin of meteorites, 340

Carinae, Eta, light variation, 48, 49;
spectrum, 379

Carrington, astronomical career, 144, 145;
sun-spot observations, 146;
solar rotation, 147;
spot-distribution, 148;
luminous outburst on sun, 159, 160;
Jovian and sun-spot periods, 163;
origin of comets, 370

Cassini, Domenico, discoveries of Saturnian satellites, 84;
of division in ring, 85;
solar rotation period, 146;
solar parallax, 228;
rotation of Venus, 250;
of Mars, 274;
of Jupiter, 290, 295;
satellite of Venus, 256;
satellite-transit on Jupiter, 291

Cassini, J. J., stellar proper motions, 10;
sun-spots on limb, 54;
theory of corona, 66;
rotation of Venus, 250;
structure of Saturn's rings, 299

Castor, system of, 18, 389

Cavendish experiment, 60, 261

Ceres, discovery, 73, 74;
diameter, 75, 288

Chacornac, observation of sun-spot, 156;
star-maps, 284, 413;
variable nebula, 403

Challis, search for Neptune, 81, 82;
duplication of Biela's comet, 96

Charlois, discoveries of minor planets, 283

Charroppin, coronal photographs, 186

Chase, photographic discovery of a comet, 338;
stellar parallaxes, 416

Chladni, origin of meteors, 327, 332

Christie, Mercurian halo, 245

Chromosphere, early indications, 68;
distinct recognition, 69, 70, 167;
depth, 174, 175, 200;
metallic injections, 195;
eruptive character, 199;
spectrum, 200

Clark, Alvan, large refractors, 114, 429, 430, 436

Clark, Alvan G., discovery of Sirian companion, 42, 430;
40-inch refractor, 433

Clarke, Colonel, figure of the earth, 262

Clarke, F. W., celestial dissociation, 206

Clausen, period of 1843 comet, 105;
cometary systems, 362

Clerihew, secondary tail of 1843 comet, 103

Clusters, variable stars in, 436

Coggia, discovery of a comet, 343

Comet, Halley's, return in 1759, 4, 88;
orbit computed by Bessel, 29;
capture by Neptune, 98, 365;
return in 1835, 101-103, 345;
type of tail, 346, 352;
of 1843, 7, 103-105;
type of tail, 346, 352;
relationships, 349