[ i 4 2 ] 



f. Black Lead Spar-, of a yellowifh green, or 

 verdegris colour; of a truncated hexahedron 

 form ; found on the lead-hills. 



g. Brown Lead Ore-, of a reddifh brown co- 

 lour, in four-fided prifms; found in Tipperary, 

 alfo at- Zfchopau. 



h. Native Glass of Lead ; depofited upon cal- 

 careous fpar, refemblingmica ; found atBergmanf- 

 torff, near Zellerfeld, on the Harz. 



i. Antimonial Lead Ore ; of an iron grey co- 

 lour. Found at Sah'lberg in Sweden, in Siberia; 

 at Lautenthal on the Harz ; and in Hungary. 

 AnaL Lead 40,50. Antimony 8, 16. With fome 

 filver. 



k. Galena ; Sulphuret of Lead, or Sulphurated 

 lead ore; one of the moft common lead ores, com- 

 bined with fulphur, fometimes filver, iron and an- 

 timony; it's matrix is generally heavy fpar, flu- 

 or, quartz, coal, fpathofe iron ore, fchiftus and 

 gneifs. Found at Bleyftedt in Bohemia, Freiberg 

 in Saxony; Siberia, Sahlberg in Sweden, and in 

 Derbymire. Anal. Lead 77. Sulphur 20. Sil- 

 ver 1. Kirwan. 



1. Pyritical Lead Ore ; combined with martial 

 pyrites. 



m. Sulphate of Lead, Vitriol of Lead; found' 



in 



