5 i A 7V<w//*0/BODIES. Chsp, 4. 



fiance; or contrariwife, of fubftance then of quantity; if there 

 be not a reall divifibility between quamity and fubftance. And 

 much leflecan it be conceived, that the fame thing hath at one 

 time a greater proportion of quantity, and at another time a 

 leffe , if the greater or lefTer proportion be not feparable from 

 it; that is, if there be not a divifibility betwixt it and-fub- 

 ftancc , as well as there are different notions of them. 

 Which to prove by the proper principles belonging to this 

 matter, would require us to make a greater inrodc into the 

 very bowels of Metaphyficks , and to take a larger circuite 

 then is fitting cither for the fub;er, or for the intended brevity 

 of this Treatife. 



CHAP. HIT. 

 Ofthefourefirft qualiticsttnd. of the fonre Elements. 



x> *"T^ He fubje6r of our difcourfe hitherto hath been three fimple 

 Thcnotionsof JL notions ; Quantity, Rarity, and Denfity. Now it {hall be 

 denfity and ra- t o enquire if by compounding thefe with gravitie or weight 



nty have a lati- / , * . <!-/ r \ t 



nidccapabieof ( which is one or thelpecicles of Quantity above mentioned, 

 infinite variety. and of - which j (hall .(J, C ak at large hereafter ; we may 

 beget any further qualities, and fb produce the foure firft bodies 

 called Elements. In imitation of Logitians, who by compound- 

 ing fuch propositions as of themfelvcs are evident to mans 

 nature affoon as they are propofed , do bring forth new 

 knowledges : which thrids they frill entermix and weave 

 together , till they grow into a fair piece. And thus the 

 {ciences they fb much labour for , and that have fo great 

 an extent, do rcfult out of few and fimple notions in their 

 beginnings. 



But before we fall to mingling and comparing them toge- 

 ther, I think it will not be amiffe to (et down and determine 

 Mvhat kind of things we mean by rare, and what by denfe; co 

 the end that when the mmes arc agreed upon, we may flio in- 

 to no errour by miftaking them. So then although there be fe- 

 vcrall confederations in regard ofwhich,rarity and dcnlity may 

 be differently attributed to bodies: yet becaufe mans discerning 

 them, robe able to difcourfe accordingly otthem,is the principal 

 rcfpect for which their denominations are to be allotted them: 



\ve 



