Advancement of Science, 318

_British Astronomical Association, Journal of_, 194

British Museum, 84

Bull (constellation). _See_ Taurus;
"Eye" of the, 297;
"Head" of the, 297

Burgos, 98

Busch, 93

Caesar, Julius, 85, 110, 180, 259, 262, 291, 293

Calcium, 138, 145

Callisto, 233-234

Cambridge, 24, 91, 119, 243

Campbell, 305

Canali, 214

"Canals" of Mars, 214-222, 224-225

Cancer (constellation), 307

Canes Venatici (constellation), 306, 314

Canis Major (constellation), 289, 296-297;
Minor, 296-297

Canopus, 285, 298-299, 320

Capella, 280, 282, 290, 294, 297, 303, 313

Carbon, 145

Carbon dioxide. _See_ Carbonic acid gas

Carbonic acid gas, 166, 213, 221-222

Carnegie Institution, Solar Observatory of, 118

Cassegrainian telescope, 114, 118

Cassini, J.D., 236, 240

"Cassini's Division" in Saturn's ring, 236, 238

Cassiopeia (constellation), 279, 294, 311, 314

Cassiopeiae, [e] (Eta), 303

Cassiopeia's Chair, 294

Cassius, Dion, 86

Castor, 282, 297, 304

Catalogues of stars, 106, 290-291, 311

Centaur. _See_ Centaurus

Centaurus (constellation), 298, 306

Centre of gravity, 42, 283-284, 324

Ceres, diameter of, 30, 225

Ceti, Omicron (or Mira), 307-308

Cetus, or the Whale (constellation), 307

Chaldean astronomers, 74, 76

Challis, 243-244

Chamberlin, 337

"Chambers of the South," 299

Chandler, 308

Charles V., 261

"Charles' Wain," 291

Chemical rays, 127

Chinese and eclipses, 83

Chloride of sodium, 122

Chlorine, 122, 145

Christ, Birth of, 102

Christian Era, first recorded solar eclipse in, 85

Chromatic aberration, 110

Chromosphere, 71-72, 93-94, 130-132, 138-139

Circle, 171-173

Clark, Alvan, & Sons, 117-118, 303

Claudius, Emperor, 86

Clavius (lunar crater), 199

Clerk Maxwell, 237

"Clouds" (of Aristophanes), 101

Clustering power, 325

Clusters of stars, 300, 306, 314, 328

Coal Sacks. _See_ Holes in Milky Way

Coelostat, 119

Coggia's Comet, 254

Colour, production of, in telescopes, 109-111, 115, 121

Collision of comet with earth, 345-346;
of dark star with sun, 346-348;
of stars, 285, 312

Columbus, 103

Coma Berenices (constellation), 307, 316

Comet, first discovery of by photography, 258;
first orbit calculated, 255;
first ph