OF THE ORIGIN OF CHEMISTRY. 65 



butetl to him, dc Inpidibns pretiq/is. Others al- 

 fo believe the PbyficannA Myjlica to be his: But 

 it is not yet afcertained that any of thefe are 

 genuine, and which is entitled to his name. 

 Vitruvius fpcaks of ^/*;ur *, which arc fo cal- 

 led on account of the waxen marks (lamped 

 with a ring which he ufed to put to all thofc 

 paradoxes that he had found to be true ; or be- 

 caufc he inferted nothing into that book but 

 from his own obfervation and experiments. 



Arillotlc the Stagy rite, in his third and fourth 

 book of Meteorologies, treats of fotlils, dividing 

 them into opwr* and *rr*.xivr*. His difciplc The- 

 ophrailiH Ilrcilus wrote v *&- and although 

 he was ignorant of chemical analyiis, yet he 

 dcfcribes fevcral qualities, and fomctimcs their 

 condition by fire. Diofcorides of Anazarba, in 

 the firft century f, and Galen in the fecondj, 

 enumerated all thofe minerals that were ufed in 

 medicine. 



There is yet extant a manufcript chemical 

 trcatife of Porphyrius in the third century, a 

 work of lamblicir. in the fourth, and an Iambic 

 poem of Heliodorus, to Thcodoiius the Great, 

 Of the myjlcriwt Art of Pbihfopbcrs. The filth 

 century produced tbc tinclurcs of Per/tan cop- 

 per and Indian iron, by Philip of Sides; the 

 E E.ffay 



* I.xi. c. ^. 



j* Mat. mcd. 

 J Simp, mcd fac. 



