46 New Theories of the Great Forces. 



same time, over one and the same telegraph 

 wire ; and in like manner, great solar cur- 

 rents may pass to and fro without interference. 



Solution of the Problem. 

 Sun-heat, therefore, like sunlight and grav- 

 ity, is a veritable production, yet it is not 

 due to the process of combustion. It is not 

 dependent for its creation upon the destruc- 

 tion of fabulous quantities of substantial ma- 

 terials. The rather does it originate in, and 

 is it disseminated through the vast energies 

 of spheres retro-acting upon spheres through 

 out the whole universe of matter. 



