*8 impetferttonoft^e^mtfl^ 



ed to owe their brittlenefs to any par* 

 ticipation of Tin, of which they have 

 no need, if the matter they confift of 

 wants not the requifite Mechanical 

 Difpofitions. 



And here I (hall venture to add,that 

 the way employed by the Ghymifts^ 

 as well as the Peripateticks, of ac- 

 counting for things by the Ingredi- 

 ents, whether Elements ^Principles, 

 or other bodies, that they fuppofe 

 them to confift otV will often fruftrate 

 the Naturalifts expe&ation of events, 

 which may frequently prove differ- 

 ing from what he promised himfelf,up« 

 on the Confideration of the Qualities 

 of each Ingredient. For the enfuing 

 Notes contain divers Inftances, 

 wherein there emerges a new Quality 

 differing from, or even contrary to, 

 any that is confpicuous in the Ingre- 

 dients 5 as two tranfparent bodies 

 may make an opacous mixture, a yel* 

 low body and a blew one that is 

 green^ two malleable bodies, a brittle 

 one, two aftually cold bodies^ a hot 



one. 



