340 
LEAD. — COPPER. 
remain undescribed, we can briefly notice but a 
few. 
Lead — Lead is found in numerous places in the 
United States, but in few, however, in quantities 
sufficient to render its working profitable. It has 
been worked at Southampton and near Middletown 
(Connecticut), also in several places in Dutchess 
county (New- York), and at the Perkiomen Mine in 
Pennsylvania. The most valuable locality of this 
mineral in the State of New- York is at Rossie, in 
St. Lawrence county, where a vein two feet wide 
penetrates a ledge of rocks fifty feet high, and ex- 
tends to an unknown depth. 
One of the most extensive deposites of lead 
on the globe exists in what is called the Mineral 
District of Missouri, which comprises parts of the 
counties of Washington, St. Genevieve, Jefferson, 
St. Francis, and Madison, extending a distance of 
about seventy miles in length, and from the Missis- 
sippi, in a southwesterly direction, about fifty miles 
in breadth. Besides a great abundance of lead, this 
region contains also iron, manganese, zinc, anti- 
mony, arsenic, plumbago, &c. The lead ore is the 
galena or sulphuret of lead. It is found in loose de- 
tached masses in the soil, and not in veins, in rocks, 
as it usually occurs, and yields about seventy per 
cent, pure lead, and an annual product of several 
miUion pounds. 
The total amount of lead from the United States 
lead-mines in Missouri, from 1825 to 1832, was 
5,151,252 pounds; and from 1821 to 1836, the pro- 
duct of the lead-mines of Fever River amounted to 
70,420,357 pounds, giving a total from both these 
sources of 75,571,609 pounds. 
Copper. — Copper is found in many places in this 
country, in connexion with lead and zinc, as at the 
Perkiomen lead-mine* (Pennsylvania), Schuyler's 
* There are indications of a rich deposite of copper near 
Rossie, St. Lawrence county, New- York. 
