SOLAR SYSTEM. 71 



the nucleus ; whereas, when the comet recedes from 

 the sun, the matter which is projected from that body, 

 impels the atmosphere to extend in advance of the 

 nucleus ? 



107. If matter is projected from the sun, and if 

 all space is pervaded by a resisting medium, as phi- 

 losophers now suppose, at what distance from the 

 sun will the matter, which is projected from that 

 body, and transmitted through that medium, be 

 brought to a state of rest ? 



108. As there can be no loss of matter anywhere, 

 but there must be an acquisition elsewhere ; if, there- 

 fore, matter is projected from the sun, in what region 

 in space is the acquisition made ? 



109. Is heat matter? 



110. Is the solid matter of the solar mass now 

 resolving into heat ? 



111. If the solid matter of the solar mass is re- 

 solving into heat, is there a provision in nature by 

 which again the solar heat is reduced to the con- 

 dition of solid matter ? 



112. Is it not at variance with all that is known 

 in regard to the economy of nature, to suppose that 

 the heat which radiates from the sun, save that in- 

 finitesimal quantity that falls upon the planetary 

 bodies, subserves no immediate or ulterior purpose in 



