Geology and Mineralogy of a part of Massachusetts, &c. 57 
8. SULPHURET OF LEAD. 
Specimens of common galena have been brought to me 
from Adams. A bed of the ore is said to be on the E. 
side of Saddle Mt. In Williamstown, in small quantity. 
In Livingston, near Hudson, in a large bed. 
9. ZINC. 
Some form of zinc exists in the iron ore at Salisbury. 
A large quantity of the artificial laminated mineral, Cadmia, 
described in this Journal Vol. VI. p. 180, has been found in 
the chimnies of the furnaces. 
10. OXIDE OF MANGANESE. 
Var. 1. Radiated. 
In distinct short four sided prisms on the compact variety— 
has a fine lustre——in a loose mass of several pounds found 
in Pittsfield. 
Var. 2. Compact. 
Bennington——abundant. It occurs in small quantity at the 
other ore beds. Also, Sheffield, West Stockbridge, Ad- 
ams, and Cummington. 
Var. 3. Earthy. 
Colour brown and brownish black, fracture and texture 
earthy, very light. Bennington. Also at Richmond with 
Gibbsite ; Emmons. 
Var. 4. Siliceous Oxide of Manganese. 
Yn small quantity. 
- Vou. VITI.—No. I. 8° 
