1826.] affecting Chetnico-Minemlogical Systems. 423 



9. F. Gold. 

 Native gold Au 



Electrum, or argentiferous gold Ag Au 



10. F. Tellurium. 



Native tellurium Te 



Tellurets, 



TeUuret of bismuth Bi Tes 



lead (Au Te3 + 4 Pb TeM+ 2 Pb S') 



silver {foliated tellurium) Ag Te« + 2 Pb Te^ + 3 Au Te» 



Graphic tellurium Ag Te» + 3 Au Te^ 



\\. F. Antimony. 



Native antimony Sb 



Stibiurets. 



Antimonial silver Ag'' Sb 



12. F. Arsenic. 



Native arsenic As 



Arseniurets. 



Arsenical nickel. 



(kupfernickel) Ni As 



■ NiAs» 



Arsenical cobalt Co As 



CoAs^ 



Arseniated bismuth Bi As" 



• copper Cu As* 



' silver Ag As" 



■ antimony. 



(testaceous) Sb As" 



13. F. Carbon. C. 



Diamond. ., 



Fossil coal. 



Anthracite. 

 Carburets. 

 Graphite F Cx 



14. F. Azote. 



Nitrogen gas Az. 



15. F. Selenium. 

 Seleniurets. 



Seleniated lead* Pb Se^ 



Seleniated copper Cu Se 



Eukairite 2 Cu Se + Ag Se" 



16. F. Sulphur. 



Native sulphur S 



Snlphurets. — Sulphuret of manganese Bin S' 



Sulphuret of zinc (blende) Zn S* 



Pyrites. 



a. Yellow pyrites ) p. 04 



b. White pyrites j 



c. Magnetic pyrites Fe S^ + 6 Fe S^ 



Sulphuret of cobalt Fe S< + 4 Cu S + 12 Co S3 



Sulphuret of nickel Ni S^ 



Sulphuret of copper. 



a. Grey sulphuret of copper Cu S 



b. Hepatic sulphuret of copper FeS'^ + 4 Cu S 



c. Pyritous sulphuret of copper Cu S + Fe S* 



Galena Pb S^ 



Sulphuret of bismuth. Bi S'' 



Nadelcrz Pb S- + 2 Cu S + 2 Bi S' 



* From the Hartz. Analysed by M. H. Rose, who has lately iliscoveretl several 

 mineralized selcniurettcd metals. 



