X CONTENTS. 



PAGE 



The effect of this fusion and expansion will cause a permanent 

 bulging out in the equatorial region, and a transient bulg- 

 ing out in the region most removed from the sun . . 136 



The moveable bulging out on the side nearest to the sun and 

 on the side farthest away from the sun will be equal, or 

 nearly equal, to each other 137 



The tides support the idea that the solar heat acts upon the 

 earth in this manner 138 



The present theory of the tides is very unsatisfactory . 139 



One great objection to this theory 139 



Another great objection to this theory . . . . . 140 



A third great objection to this theory 140 



Another theory of the tides which obviates these objections . 143 



In this theory the lands immediately under the sun and the 

 lands directly away from the sun are supposed to rise out of 

 the waters in obedience to that expansive action of the solar 

 heat which has been explained, the water retaining its level . 143 



In this action the moon will act in the same manner as the 

 sun, and with greater power 146 



The metamorphosis of comets supports the idea that the solar 

 heat may have this peculiar expansive action . . . 148 



The volume and rarity of comets 149 



The changes in Halley's comet in 1835 151 



The solar heat may cause the ejection of nebulous matter from 

 the side nearest the sun . . . . . . 153 



