88 
{Assembly 
Albite, in large crystals — Near Patterson. 
Laumonite, stilbite and chabasie — Formerly obtained at Coldspring. 
The locality is believed to be exhausted. 
Epidote, in beautiful crystals — Near Carmel. 
Mica — Several locaHties. 
Zircon — Formerly obtained at Cold Spring. 
Iron pyrites — Associated with magnetic iron ore. By long exposure 
to the weather the iron pyrites is decomposed, and the resulting salt 
washed out. 
Pyritous copper and green carbonate of copper — Philip's ore bed. 
Sphene — At the Philips ore bed, and formerly at Cold Spring. 
Orpiment or yellow sulphuret of arsenic — Formed on the timbers of 
the old arsenic mine by the decomposition of the arsenical iron p3rrites. 
Copperas or sulphate of iron — Formed by the decomposition of iron 
p}Tites, on the farm of J. Wood, six miles S. S. E. of Carmel. 
QUEENS COUNTY. 
The only substance at all connected with this department of the sur- 
vey, in this county, is peat, of which Mr. Mather informs us that there 
are several localities.* Many of the minerals, however, found in other 
parts of the State occur here in bowlders. 
RENSSELAER COUNTY. 
This county does not contain many useful minerals, strictly so called, 
and there are but few that possess much interest to the mineralogist. 
As a geological survey of it was made by Professor Eaton, in 1821, its 
productions are probably as well known as those of any other county. 
In an economical point of view, one of the most important substances 
here found is marl, of which there is a bed in the town of Schaghti- 
coke. The same substance, but more pure, occurs in various parts of 
the town of Sand Lake. 
Sulphur springs abound in this county, and some of them have ac- 
quired celebrity for their supposed medicinal properties. But these as 
they are found in almost every county in the State, do not excite so 
much interest as the springs of Hoosick, which, like the Lebanon 
* New-York Geological Reports, 1338, p. 122, 
