Thus sun light and sun heat are shown 

 to resemble the light and heat which \ve 

 are able to develop through the aid of 

 our magnetic machines. The fact of 

 the actual production of the intensest 

 heat yet reached, through the agency of 

 mere motion, opens up to us a new 

 view of these great forces. As motion 

 applied to our dynamo-electric machines 

 is changed or converted into light and 

 heat, so also may sun light and sun 

 heat be the products of mere change, 

 of simple conversion of force instead of 

 the products of a measureless and cease- 

 less destruction. The element out of 

 which they are developed passes, as we 

 may suppose, through all space without 

 visible form or manifestation, as electric- 

 ity through wires, and without visible 

 means of transportation; as for example, 

 Prof. Loomis sent the magnetic current 

 from kite to kite, flown from Virginia 

 mountain-tops, twenty miles apart. 

 Moreover, as the "carbon point" or the 

 "platinum coil" is the necessary resist- 

 ance, the encountering of which de- 

 velopes the electric light out of our lit- 

 tle electric current, so may this earth's 

 atmosphere furnish the required resist- 

 ance out of the encounter with which 

 the great current of force from sun to 

 earth, invisible while passing through 

 vacant space, becomes manifest light 

 and heat. The analogy, to say the least, 

 is very striking. 



Science at the present time admits of 

 four different explanations of the pro- 

 duction of sun-light and sun-heat, viz : 



(1). Combustion of cosmical substan- 

 ces falling into the sun ; (2) arrest of 

 motion of such cosmical substances ; (3) 



