A SYSTEM OF PARTICLES. 285 



55. From what has been said, (10, &c.) it appears that if bodies 

 be impregnated with two systems of particles which are endued witli 

 forces attractive in their action on particles similar to themselves, but 

 mutually repulsive of each other, the following results will ensue. 



That a transverse vibratory motion of the one must, in general, 

 be accompanied by a transverse vibratory motion of the other, (10) 

 (34) ; that a translation is generally consequent on, and varying in 

 intensity with, this vibratory motion (36). That when one fluid moves 

 forward the other moves backward (10). By reference to those sub- 

 stances in which it would appear that the vibrations of the internal 

 ether were considerable, the velocity of transmission of heat was found 

 (by means of the hottest point of the spectrum) to be also consider- 

 able. And further, that when a body contained a large quantity of 

 caloric, it uniformly (with one exception, and that not a striking one.) 

 has been found to contain a proportionably small quantity of ether; 

 results in which theory is confirmed by experiment. 



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