Supplement to the Calculus of Operations. 



193 



and finally the arc becomes a straight line (c), and the state 

 of steam or gas is achieved by the aid of 540° of latent 

 heat. 



If two bodies are of unequal temperature, the greater 

 will yield to the less until they become equal, when they 

 will exchange equal quantities ; so that matter always 

 emanates heat. 



The globe of the earth emanates heat in all directions 

 into space. At a given distance from the surface of the 



earth, suppose a small body (A) let loose ; it emanates a 

 small portion, which breaks the emanation from the earth ; 

 an equal quantity of emanation equilibrates on the opposite 

 side of the earth (B), which causes the body to fall. It is 

 instantly taken up by the next emanation ; and so on, and 

 describes a square. Every break of the original arc is 

 instantly transmitted to the opposite side and pulled by 

 Trans, viii.'] 25 



