Pottrtne of ^tualitie** 43 



That to derive the particular Qua- 

 lities of bodies from thofe Subftamial 

 forms, whence the Schools would 

 have them to flow^ is but an infuffici- 

 ent and unfit way of accounting for 

 them,may appear by thhythatsubjian- 

 tial forms themfelves are things^ 

 whofe exiftence many Learned Phi- 

 losophers deny, whofe Theory many 

 of them think Inccmprehen(ible> and 

 the rood Candid and Judicious of the 

 ferifatetickj themfelves confefs it to 

 be very abftrufej fo that from (iich 

 doubtful and obfeure Principles wc 

 can hardly expeft clear Explications 

 of the nature #nd Phenomena of Qua- 

 lities $ not t'o'urge,- that the Ariftoteli- 

 an Definitions, both of Qualities in 

 general 5 and of divers of the more fa- 

 miliar Qualities in particulars Heat 

 Cold^MoifturejDiaphaneity, &c. are 

 far enough from being clear and welt 

 framed^as we elfewhere have occafi- 

 on to ijiew. 



Another thing, which makes the 

 Scholaftic Do&rineof Qualities un- 

 fatisfa&ory, is,that it feldom fo much 

 •wit' as 



