JS6 ESSAYS AND OBSERVATIONS 



doubt betwixt thefe two oppofites ? "We 

 5ire certain that a fmooth level furface is 

 jiot a necefTary property of foUds. The 

 gravity of a whole hill of fand, is but an 

 allertion without evidence. What remains 

 then, but that we adhere to the former, 

 and rejedl the latter, except as to fluids ? 

 And thus our author luckily, tho' with- 

 out intention, has furnifhed a very con- 

 Tincing argument againfl the univerfality 

 of this fuppofed law of gravitation. If 

 a fmooth level furface is an effed of this 

 law, it follows clearly, that this law takes 

 not place in folids, at lead not uniyerfally, 

 as in duids. 



Art. 



