Doctrine of &ualttte& ay 



one, two fluid bodies , a confident 

 one, &c. Anfl as this way of judg- 

 ing by material Principles hinders the 

 foreknowledg of Eyents from being 

 certain i fo it much more hinders the 

 aflignatioii of Caufes from being fa* 

 tisfa&oryjfo that perhaps fome would 

 not think it very rath to fay,that thofe 

 who judg of all mixt bodies as Apo- 

 thecaries do of Medicines, barely by 

 the Qualities and Proportions of the 

 Ingredients (fuch as among the Ari- 

 ftotelians are the four Elements, add 

 among the Chymifts the tria primal) 

 do, as if one (hould pretend to give 

 an account of the Phenomena and 

 operations of Clocks and Watches, 

 and their Diverfities by this, That 

 fome are made of brafs wheels,fome 

 of iron 5 fome have plain ungilt 

 wheels, others of wheels overlaid 

 withGold, fome furniftied with gut- 

 firings, others with little chains, &c, 

 and that therefore the Qualities and 

 Predominancies of thefe metalls that 

 make parts of the Watch, ought to 

 have aferibed to them, what indeed 



flows 



