CONTENTS 



CHAP. PAGE 



I Introductory Chapter 1 



II General Dynamical Principles 19 



III Ellipsoidal Configurations of Equilibrium ..... 35 



IV The Gravitational Potential of a Distorted Ellipsoid ... 65 



V Pear-shaped Configurations of Equilibrium . . . . . 78 



VI Motion when there are no Stable Configurations of Equilibrium . 117 



VII The Motion of Compressible and Non-homogeneous Masses . . 139 

 VIII The Evolution of Gaseous Masses 188 



IX The Evolution of Rotating Nebulae 203 



X The Evolution of Star-Clusters 220 



XI The Evolution of Binary and Multiple Stars .... 246 

 XII The Origin and Evolution of the Solar System .... 269 



Index . 291 



LIST OF ILLUSTRATIONS 



Planetary and Ring Nebulae : 

 N.G.C. 



Spiral Nebulae : 



N.G.C. 



