do) 

 OlifhM, and perhaps aJfo immediately fuc- 

 ceeded by a new Quality Mechanically 

 producible i if, I fay, this come to pafs in 

 a body Inanimate, efpecially if it be al(b, 

 as to fenfe fimilar, fuch a Thtmmtnon will 

 not a little favour that Hypothefis which 

 teaches, that thefe Qualities depend upon 

 certain contextures and other Mechanical 

 Aflk&ions of the fmall parts of the bo- 

 dies, that are indowed with them, and 

 confequently may be abolilh'd when that 

 neceflary Modification is dcltroyed. This 

 is thus briefly premised to (hew the perti- 

 nency of alledging differing kinds of Ex- 

 periments and Pbtnomenp in favour of the 

 Corpufcular Hypothefis about Qualities. 



What has been thus laid down, may, I 

 hope, facilitate and (hortcn moft of the 

 remaining work of this Preamble, which 

 is to fhew, though but very briefly, that 

 there may be feveral ways, not imperti- 

 nently employable to recommend theCor- 

 pufculamn Do&rine of Qualities. 



For firft, it may fometimes be fhewn, 

 that a Subftantial Form cannot be pre- 

 tended to be the neceflary Principle of 

 this or that Quality * as will (for inlhnce) 

 hereafter be made manifeitinthe Afperity 

 and Smooibnefs of bodies, and in the Mag- 

 netted Virtue redding in a piece of Iron 

 that has been impregnated by a Load- 



ftonc. 



