CONTENTS. Xlll 



BOOK IX. 



THE MOVEMENTS AND CONFIGURATION OF 

 THE SURFACE OF THE EARTH. 



CHAPTER XVIII. 



PAGE 



Preliminary 197 



CHAPTER XIX. 



The Action of Vis-Inerti.e on the Surface of the Earth 205 



BOOK X. 



THE ACTION OF VIS-INERTIJi IN THE 

 HE A YENS. 



the system of the world. 



CHAPTER XX. 

 Preliminary 221 



CHAPTER XXI. 



The Motions of the Planets 223 



