100 DEATH AND RESURRECTION. 



atoms or sustaining their movement, 

 and this explains why heat is devel- 

 oped in chemical processes. If this de- 

 velopment of heat is increased to a 

 certain point, or, which is the same, if 

 the reaction takes place with greater 

 violence, the common phenomena of 

 fire and light appear. But even with- 

 out these, every chemical process may 

 be called combustion in a wider sense, 

 that is, if we consider the production 

 of heat as the characteristic external 

 effect of the chemical force. 



At sufficiently high temperature, 

 then, all matter must be in an incan- 

 descent gaseous state, and vice versa at 

 a low temperature it is a solid mass. 



With these short notes we have also 

 outlined the history of our own earth. 

 The same gaseous state in which our 

 sun is at present belonged once to the 

 earth according to science of today. 

 During enormous periods of time the 

 incandescent matter of the earth radi- 

 ated light and heat into the cold uni- 

 verse. Finallv so much heat was lost 



