36 THE INVISIBLE WORLD 



tern. All these bodies, great and small in all the 

 systems, are parts of the universe. They all rotate 

 on their axes. They all travel in their orbits 

 around the central suns. All these suns roll on 

 their axes, and each with its entire system is ex- 

 ecuting a translatory motion in space towards 

 some point in the universe. 



All these heavenly bodies are held in their 

 places, and all their motions are caused and neces- 

 sitated, by the mighty power of gravity. 



The medium in, and by, which this force acts, 

 the medium which makes it possible for the 

 most distant bodies in the universe to attract each 

 other and all the rest, and all the rest to attract 

 them, is doubtless the infinite Sea of Ether. 

 Light, electricity and magnetism also move through 

 this medium at the rate of 196,000 miles per sec- 

 ond, and exert an influence in working out the 

 destiny of the universe coequal with that of 

 gravity. The giant force of heat adds its service 

 in determining the state of all the matter in the 

 universe, whether it be gaseous, liquid or solid. 



But the infinitely great is made up of infinitely 

 littles. As before stated, the great masses of mat- 

 ter composing the universe are composed of in- 

 finitely small molecules not more than TrnniVinnF 

 of an inch in diameter. The molecules are com- 

 posed of still smaller bodies called atoms not more 

 than TTFTnTfannnr of an inch in diameter. The atoms 

 are composed of bodies smaller still, called elec- 

 trons, not more than T^TnyTFTiWTTnnFTF of an inch 



