Index 



293 



Rotation of spiral nebulae, 6, 207, 217 

 Russell (H. N.), 3, 4, 13, 14, 201, 202, 249, 256, 



265, 266, 267 

 's theory of stellar evolution, 13, 201, 



249 



Sanford (R. F.), 7 

 Saturn, 2, 280, 282, 283 

 rings of, 11, 136, 138 

 satellites of, 2, 3, 136, 138, 281, 284 

 Schuster, 146, 245 

 Schwarzschild, 31, 65, 80, 87 

 Secular instability, 31, 32, 52 

 See (T. J. J.), 15, 17, 247, 272, 284 

 Shapley, 8, 9, 221, 243, 249 

 Slipher, 5, 6 

 Solar radiation, 285, 286 



,, system, angular momentum of, 15, 270, 



271, 275 



origin of, 11, 17, 18, 138, 269 ff. 

 Spectral type, 13, 256 

 Spectroscopic binaries, 3, 255 

 Spheroidal configurations 

 of a rotating mass, 35, 137 

 of a tidally-distorted mass, 45, 83, 118, 137 

 Spindle-shaped nebulae, 5, 248 

 Spiral nebulae, see Nebulae 

 Stability, coefficients of, 25, 30 



,, disappearance of, 22, 32, 41, 45, 50 



,, exchange of, 22, 25, 32 



of binary systems, 51, 85, 137, 162, 



187 



,, mass of gas at rest, 190, 199 

 ,, rotating systems, 26, 40, 84, 137, 



149, 185 

 ,, ,, tidally-distorted masses, 45, 59, 



83, 137, 153, 186 

 Star-clusters, globular, 8, 9, 220, 243 



Star-clusters, moving, 9, 267 

 Star-streaming, 235, 240, 242, 289 

 Steady-motion in stellar dynamics, 232 

 Stellar dynamics, general theory, 224 



,, evolution, order of, 12, 13, 201, 202, 256 



radiation, 198, 200 

 Sutherland, 17 



Taurus Cluster, 3, 9 



Temperature of stellar interiors, 250 

 ,, ,, surfaces, 13 



Thomson and Tait, 30, 38 



Tidal action, dynamics of, 43, 83, 118, 137 

 ,, ,, theory of cosmogony, 16 

 ,, ,, ,, solar system, 275 



friction, 53, 62, 253, 263 



Triple and Multiple stars, 3, 4, 264 



Truman, 6 



Turner (H. H.), 10, 235 



U Pegasi, 253 

 Uranus, 2, 275 



satellites of, 2, 282, 284 

 Ursa Major, cluster in, 9, 10 



nebula (M. 101) in, 6, 215, 216, 217 



Van Maanen, 6, 8, 216, 223 



Venus, 284 



Virial, 188 



Von der Pahlen, 4 



Von Zeipel, 8, 245 



W Crucis, 258 

 Wright, 5 



X Carinae, 253 

 Young and Harper, 6 



CAMBRIDGE : PRINTED BY J. B. PEACE, M.A., AT THE UNIVERSITY PRESS 



