Contents. 



CHAPTER V. 



PAGE 



SUN-HEAT, ITS SOURCE AND LIMITS 35 



Tendencies to unsettle in science Present theories 

 True source Earth's part in the process Sun's 

 part New philosophy Old phenomena and new 

 interpretations Aurorae Well understood pro- 

 cesses in confirmation The ordinary battery The 

 Great -Sun Battery Heat without combustion 

 Intercurrents Solution of the problem. 



CHAPTER VI. 

 THE SEASONS 47 



Why their varying temperature? A new philosophy. 



CHAPTER VII. 

 GRAVITY 50 



Its essential nature and its source. 



CHAPTER VIII. 



THE ATMOSPHERE 52 



A veritable ocean How constituted The vito-mag- 

 netic principle, its extent and character Its func- 

 tions The air not yet comprehended Have we 

 been mistaken ? New light Electrical induction 

 Its mode of action and illustrations The character 

 and virtue of the vito-magnetic element. 



