VI CONTENTS. 



CHAPTER IX, Page 



Quicksilver Deposits, Saliferous Deposits, &c. 58 



CHAPTER X. 

 Polarity of Earthquakes 64 



CHAPTER XL 



The Northward and Undulating Movement of the Earth's Surface 

 en masse, by the Constant Circulating Action of the Magnetic 

 Currents 66 



CHAPTER XII. 



The Northward Movement of the Surface proved by the Climate 

 of the Land in the Northern Hemisphere getting colder 72 



CHAPTER XIII. 



The Division of the Surface of the Globe into Zones of Deposition 80 



CLIAPTER XIV. 



On the General Nature of the Distribution of Heat over the Sur- 

 face of the Globe, and the Zones of equal Temperature 92 



CHAPTER XV. 

 On the Positions, Undulations, Contortions and Fractures of the 

 Sedimentary Rocks. — Faults, &c 101 



CHAPTER XVI. 

 General Observations 110 



CHAPTER XVII. 

 Universal Magnetism 112 



CHAPTER XVIII. 



On the General Application of Laws of Terrestrial Magnetism. . 124 



