58 
[Assembly 
peras are spontaneously formed in the town of Sheridan, a fact which 
is undoubtedly to be ascribed to a decomposition of iron pyrites in con- 
tact with alum earth. 
CHEMUNG COUNTY. 
Concerning the mineralogy of this county I have at present nothing 
to communicate — From what is known of its rocks, it is to be inferred 
that the hst of its minerals is very limited. 
CHENANGO COUNTY. 
The only localities which I have here to notice are two or three sul- 
phur springs, which are frequented by those who are afflicted with cu- 
taneous diseases. They probably contain the usual ingredients of such 
waters, although I have not yet had an opportunity to analyze them. 
CLINTON COUNTY. 
The northern counties, of which this is one, are justly celebrated 
for their great mineral resources ; but unfortunately few of them have 
yet been sufficiently explored to enable us to do full justice to their mi- 
neralogical history. During the year 1836, I hastily examined some of 
the beds of iron ore which this county contains. Notices of these, 
together with some further information by Mr. Hall, will be found in 
the first annual report of the Survey. I will only add that the magnetic 
iron ores of this county are among the best in the State, and that the 
iron obtained from them is highly esteemed. The Arnold mine de- 
serves to be particularly noticed both on account of the quantity and 
quality of the ore which it yields. 
Bog iron ore, has also been found on the head waters of the Saranac, 
which may be very advantageously employed to mix with the mag- 
netic variety. 
Marble occurs near Plattsburgh, in Chazy, and in other parts of this 
county. It is usually of a black colour, contains organic remains, takes 
a good polish, and is often quite equal in beauty to the celebrated Irish 
marble. According to Dr. Emmons, peat is also found here in great 
abundance. This at no distant day, must prove to be of great value 
in a district where manufacturing operations will no doubt be exten- 
sively carried on. 
