INDEX 



[The numbers refer to the pages.] 



A-type stars, 13, 14, 239, 241, 249, 270 

 a Centauri, 259, 260, 268 

 Absolute magnitudes, 14, 201, 202, 287 

 Adams (W. S.), 14 



and Joy, 14, 201, 202 

 Adiabatic equilibrium, gas in, 165, 184, 193, 



194, 204 

 ,, rotating gas in, 165, 



184, 185, 203 



Andromeda, nebula (M. 31) in, 5, 217, 223 

 Angular momentum in binary stars, 257, 259 

 ,, ,, in solar system, 15, 270, 



271, 275 



Arrhenius, 17, 247 

 Asteroids, 1, 2, 281 

 Atmospheres of binary stars, 163, 248 

 ,, nebulae, 204 



,, planets, 281, 282 



B-type stars, 3, 13, 14, 239, 241, 242, 249,263, 



270 



p Lyrae, 248, 250, 253 

 Babinet's criterion, 15, 270, 275 

 Bailey, 8 



Bifurcation, points of, see Points 

 Binary stars, 2, 255 



,, dynamics of, 46, 134, 137, 162, 



187, 246 ff. 



,, genesis of, 246 ff., 289 

 orbits of, 252, 253 ff. 



Bode's Law, 17, 284 

 Boss, 3, 9 

 Brown (F. G.), 7 

 Bryan (G. H.), 43 



Campbell (W. W.), 3, 4, 5, 6, 9, 14, 204, 240, 241, 



247, 253, 255, 256, 258 

 ,, and Moore, 7 



Canes Venatici, nebula (M. 51) in, 6, 215 

 Cataclysmic Motion, 23, 117 ff., 148, 252 

 Cepheid variables, 9, 248, 258 

 Chamberlin, 16 



and Moulton, 16, 131, 272 

 Charlier, 223, 229, 236, 239 

 Clausius, 181 



Clusters, star, see Star-clusters 

 Coefficients of stability, 25, 30 

 Collisions between stars, 224, 237, 238 

 Compressible masses, dynamics of, 139, 165, 188 

 Condensations in spiral nebulae, 17, 216, 247, 



289 



Contraction, energy generated by, 191, 285, 286 

 Cosmogony, theories of, 10, 269 

 Courvoisier, 265 

 Curtis, 221 

 Cylinders, rotating liquid, 102 



Darwin (Sir G. H.), 11, 33, 39, 40, 46, 52 ff., 



61 ff., 80, 84, 87, 88, 92, 146, 252, 253 

 Deflection, gravitational, of a star, 226, 229 

 Density of binary stars, 249, 250 



,, ,, at fission, 248, 249, 267 



Dirichlet, 119 



Double stars, see Binary stars 

 Draper classification of Stellar spectra, 13 

 Duncan, 248 

 "Dwarf" stars, 13, 201, 202 



Earth-moon system, 3, 282, 290 



Eccentricity of orbits of binary systems, 252, 



255, 256, 263, 264 



,, ,, in solar system, 2, 284 



Eclipsing binaries, 249 

 Eddington, 188, 189, 222, 223, 229, 235, 236, 



239, 250, 251 



Effusion of gas from a rotating gaseous mass, 247 

 Ellipsoidal configurations of gravitating masses, 



35 ff., 65, 137 

 Emden, 250 

 Equatorial ejection of matter from a rotating 



mass, 150 ff., 185, 186, 206, 207, 209, 210, 



214, 247, 272, 275 



Equipartition of Energy, in binary systems, 261 

 ,, ,, in star-clusters, 238 ff. 



Faye, 18 



Fission, the process of, 115, 132, 138, 144, 185, 



246 flf. 

 Fouche", 15 



Friction, tidal, see Tidal friction 

 Frost, 3 



