PHYSICAL AND LITERARY. 135 



other fuch like cafes. The attratflions 

 betwixt fmall corpufcles will be fhown 

 to proceed from an external caufe in the 

 fame manner. And hence it will follow* 

 that elafticity and the chymical effer- 

 vefcencies, are not the refult of the a6li- 

 vity of attra(5iing particles. And for the 

 fame reafon a body thrown upwards can- 

 not move up by an adlive force of its own } 

 for that would be oppolite to the adlive 

 force of gravitation. 



If, in order to evade the foregoing ar- 

 gument, it fhould be faid, that a body 

 never tends to two oppofice bodies at the 

 fetoe time J but tends only to one fide 

 with the difference of the forces with 

 which it would tend to each of thefe bo- 

 dies taken feparately : This will at leaft 

 afford another remarkable inftance of that 

 exad: regularity with which the power of 

 gravity is varied and adapted to the dif- 

 ferent fituations of bodies ; and which it 

 is quite inconceivable that blind matter 

 ihould perform without the fuperinten- 

 dence of an intelligent being. 



It 



