104 
[Assembly 
bushels of salt were manufactured. But these works have long since 
ceased, in consequence of their vicinity to the more important springs 
of Onondaga. 
WESTCHESTER COUNTY. 
This county furnishes an extensive list of minerals. Among the most 
important, in an economical point of view, may be ranked the dolomi- 
tic marble, which occurs abundantly in various places, and is exten- 
sively employed as a building material. 
Of iron ore, some localities occur near Tarrytown and Sing-Sing, 
but it has not yet been found in such abundance as to warrant extensive 
operations. 
In the vicinity of Sing-Sing, mining operations were formerly car- 
ried on to a considerable extent, under the flattering idea that silver ore 
existed there. Singular stories are related of the occurrence of this 
ore, and native silver has been credited to this place, in some minera- 
logical works. We have at present no means of arriving at the truth. 
Galena has been obtained here in small specimens, and it is more than 
probable that this may have been mistaken for silver ore. Several ores 
of copper have been found in the same vicinity, as copper pyrites, 
black sulphuret of copper, and green carbonate of copper. And to 
these may be added iron pyrites, sulphuret of zinc and oxide of man- 
ganese, which occasionally occur in the limestone. 
Of sulphur springs, there is one near Sing-Sing which has acquired 
some celebrity. 
Like the counties of Putnam and Richmond, Westchester contains 
beds of serpentine, with which are associated other magnesian mine- 
rals. The serpentine, although often of a beautiful colour, and sus- 
ceptible of a fine polish, can seldom be procured in blocks of sufficient 
size for any useful purpose. 
The following is a list of the remaining minerals of this county : 
Calcareous spar, the cuboide of Hauy— Near Sing-Sing. Other 
forms, elsewhere. 
Sulphate of barytes — Anthony's Nose, near the line of Putnam 
county. 
Phosphate of lime — With the preceding. 
