162 , Report on the Geological Survey of Connecticut. 
from the breaking up of a space? formation of copper in the primi- 
tive. 
Copper ore is found in Hamden and Cheshire, near New Ha- 
ven, as well as in many other places. In addition to the forms 
which have been enumerated, we may mention vitreous copper, 
yellow copper pyrites, and the green and blue carbonates. For 
many details relative to the indications of copper in thes ag 
we must refer to the report itself. 
Lead.—The number of places where lead has been found is very 
considerable, and mines have been wrought at Middletown, Wilton, 
&c. Some very rich specimens were brought, a few years since, to 
Yale College, from Brookfield, but they appear not to have belonged 
to a continuous vein. l.ane’s mine, in Monroe, is worthy of com- 
memoration, on account of the large proportion of silver—from 2 to 
3.9 per cent. of the metallic lead; this ore is not hitherto abundant, 
but the mine has been merely opened, and not wrought deeper than 
a few feet. Since the proportion of silver is so large, this deposit 
of argentiferous galena ought to be explored. 
Zanc.—Blende, or the sulphuret of zine, is found in various places, 
and calamine (the carbonate) in small quantity at, Brookfield; cad- 
mia, an oxide of zinc, sublimes in the iron furnaces of Salisbury. 
Native Bismuth is found at Monroe. 
Arsenic—in the form of arsenical iron, (mispickel) exists at Derby, 
Monroe, Chatham, Wilton, &c. 
Cobalt and Nickel are found at Chatham. 
Molybdenum in Haddam. 
Titanium—in ee Plymouth, Granby, North Grecieien, 
and Middletown. 
Uranium, in the feldspar quarry, Middletown. 
“© Columbtum.—The State of Connecticut furnished the first sam- 
ple of this ore to science ; and in consequence of its American origin 
it received in England the name of columbite, and the new metal it 
was found to contain, that of columbium. 
“The china-stone quarry at Middletown has furnished the 
most extraordinary specimens of columbite yet described in the 
world. A single group of crystals obtained at this place weighed 
fourteen pounds.* It occurs in crystals disseminated through the 
feldspar, many of which are very remarkable, not only for their — 
size, but for their perfection of form. It is also found in small 
= 
* See this Journal, Vol. xxx, p. 387. 
