CONTENTS. 



CHAP VIII. 



Of theUNMETALLic Earth in the Pyrites* 



Page 127 

 CHAP. IX. ' 



OF the Sulphur in the Pyrites. 132 



CHAP X. 



Of the Arsenic in the Pyrites. 165 



CHAP XI. 



r 



OF the Silver in the Pyrites: 212 



CHAP. XII. 



OF the Gold in the Pyrites. 2i£ 



CHAP. XIII. 



Of the original Particles, or of 

 the PRiNciPLESof thePYRiTEs; 244 



CHAP XIV. 



OF the Vitriol from the Pyrites. 272 



CHAP. XV. 



Containing the feveral Uses of the Pyrites, and, 

 1. with Refpe& to the making oF Sulphur, 

 &c. 333 



C H A P. XVI. 



Containing, I. The Hiftory oF the Heflian Py- 

 rites, called Terra martis Hejfiaca* Communi- 

 cated by M, Rofinus, fcfr. 35 



