8 3fmperfection of t&e €&pmtfl'# 



One of their main Suppofitions is v 

 that this or that Quality muft have 

 its wfSroy Jttfliw, as Sennertus , the 

 Learnedft Champion of this opinion, 

 calls it, or tome particular material 

 Principle , to the participation of 

 which, as of the primary native and 

 genuine fubjeffc, all other bodies muft 

 owe it : But upon this point having 

 purpofeiy difcourfed elfewhere , I 

 [hall now onely obferve, that, not to 

 mention Local motion and Figure, 

 I think 'twill be hard to (hew, what 

 is the *$t*v c/WWj> of Gravity, Vola- 

 tility^ Heat, Sonoroufnefs, Tranfpa- 

 rency and Opacity, which are Qua- 

 lities to be indifferently met within 

 bodies whether fimple or mixt. 



And whereas the Spagyrifts are 

 wont to argue, that, becaufe this or 

 that Quality is not to be derived truly 

 from this or that particular Principle, 

 as Salt-y for inftance, and Mercury 5 

 therefore it muft needs be derivable 

 from the third, as Sulphur. This way 

 of arguing involves a farther Sup- 

 pofition than that newly examined. 



For 



