MECHANISM OF NATURE 



matter. But the substance will weigh no more 

 after being heated than before. 



Therefore, the void matter added to the sub- 

 stance had no weight of its own to add to the weight 

 of the substance. 



Again, because every substance is surrounded 

 by void matter, and permeated by it, and all space 

 not occupied by organized matter is filled by con- 

 tinuous void matter; therefore, void matter must 

 balance itself everywhere, even as the air on top 

 of our scales is balanced by the air under our 

 scales. And stars and planets moved through void 

 matter in fixed regular orbits, which would evi- 

 dently be impossible if void matter possessed mo- 

 mentum and would persist in any motion acquired. 



PROPOSITION VIII. 



Every identical manifestation of force is at last 

 connected, on both ends, with a movement of pri- 

 mary spheres in universal void matter. All force 

 is universal force, and all motion is universal mo- 

 tion. 



Force can act only between organized bodies of 

 material. (Prop. I, B. 3.) But the body that 

 transmitted the force did not generate that force. 

 (Prop. XII, B. 1.) Neither was it stored up in 

 the transmitting body. (Prop. XIII, B. 1.) 



Therefore, the transmitting body gave that which 

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