Dotttint of Qxmlitits; 7 



their tria prima, fince they have not 

 been able, that we know, truly, and 

 without new Competitions , to re- 

 folve into thofe three, either Gold^ or 

 Silver, or Cryftal^ or Venetian Talc^? 

 or fome other bodies, that I elfewhere 

 name $ & yet thefe bodies are en- 

 dowed with divers Qualities, as the 

 two former with Fufiblenefs and 

 Malleability, and all of them with 

 Weight and Fixity 5 fo that in thefe 

 and the like bodies., whence Chymifts 

 have not made it yet appear., that 

 their Salt, Sulphur and Mercury, can 

 be truly and adequately feparated, 

 'twill fcarce be other than precarious^ 

 to derive the malleablenefs, colour^ 

 and other Qualities of fuch bodies 

 from thofe Principles. 



Under this Head I confider alfo, 

 that a great part of the Chymical 

 Do&rine of Qualities is bottomed on* 

 or fuppofc.9, befides their newly que- 

 ftioned Analyfis by fire, fome other 

 things, which, as far as I know 5 have 

 not yet been well proved, and I que- 

 ftion whether they ever will be. 



A 4 One 



