No. 275, 1 
49 
No. 1. — Specimen from the farm of Joseph Goodsell, two miles north- 
west of Hillsdale, Columbia county. Earthy, friable, of a blackish- 
brown colour. 
No. 2. — From the farm of H. W. Gott, two miles west of Auster- 
litz, Columbia county. External characters similar to those of the pre- 
cediag. 
No. 3. — From the farm of David Parsons, three-quarters of a mile 
south of Canaan Centre, Columbia county. External chamcters simi- 
lar to the former. The specific gravity of these is not above 3. 
No. 4. — From Sing-Sing, in Westchester county. Colour blueish or 
brownish-black, compact. Specific gravity 4 . 33. Found only in small 
masses, in the Dolomite. 
No. 5. — Found near Keeseville, in Essex county. Occurs in rounded 
masses, about the size of a pea, brown externally, and brownish-black 
in the centre; earthy, friable. It contains a large proportion of water 
and oxide of iron. Other specimens may be purer. 
No. 6. — From Tug Hill, Lewds county. Colour jet black or brown- 
ish-black; earthy, friable. The only specimen I have at present, con- 
tains a very large proportion of impurities. Others will no doubt af- 
ford a greater amount of oxide of manganese. 
Lead. 
In my report for 1837, 1 gave an account of the lead mines, which 
had previously been opened in the counties of Columbia, Lewis and 
St. Lawrence. During the past season, I have visited some interesting 
localities of the sulphuret of lead, with other accompanying minerals, 
in the counties of Sullivan and Ulster, of which I shall now give a brief 
description. 
76. The principal deposit of lead ore, in the county of Sullivan, is 
situated near the summit of the Shawangunk mountains, two miles north- 
west of the village of Wurtzboro', and three-quarters of a mile from the 
Hudson and Delaware canal. This mine is situated in the millstone 
grit of which this mountain is composed, and the ore appears to be in a 
bed, alternating with the strata, although its inclination is somewhat 
different. At the place where the lead ore was first observed, a perpen- 
dicular shaft has been sunk about thirty-eight feet in depth. At the 
time of my visit, the miners were engaged in constructing horizontal 
drifts or levels to intersect the deposit of ore below the present shaft. 
The first level is about fifty-two feet below the opening of the shaft. 
[Assem, No. 275. J 7 
