ICS 
[Assembly 
The ore is associated with granular quartz on the east, and probably 
with limestone on the west,, but this latter rock was not seen near the 
ore beds. These rocks are associated in the above order at the mouth 
of Peekskill creek. 
A bed of hematite, of excellent quality, as far as the eye can judge^ 
occurs on James Ackerman's farm, about one and a half miles north of 
the county poo^-houscj and four or five miles ENE of Tarrytovv^n, in 
Westchester county: thirty tons of the ore were dug in 1837, and carri- 
ed to the furnace at Cold Spring, Putnam county. It had not been 
used in September last, but it will undoubtedly make good iron. There 
is, probabably, an extensive bed of the ore. It is associated with white 
limestone, and this range of rock reaches the banks of the Hudson^ a 
little below Dobbs' ferry. It is possible that beds of similar ore may 
be found connected with the limestone near the river. Should this be, 
the ore beds would be valuable, as there would be but little cartage to 
water transport. An acre of iron ore, only three feet thick, ought to 
yield the owner at least $4,000 if he leases it to those who dig it for 
fifty cents per ton. 
Bog ore was seen on Judge Keraey's farin, one and a half miles south 
of Sing-Sing. It was about eight inches thick, but it seemed to occu- 
py an area of only a few square rods, and in an economical point of 
view is scarcely worth notice. As a mineral, it is well characterized, 
and makes beautiful cabinet specimens. 
Red ochre and red chalk occur on H. I. Cruger's farm, in Cortland- 
town. It is presumed to be abundant from the appearances at the lo- 
cality. It has been opened a little, by persons who wished to obtain 
small quantities of these materials. Specimens are deposited in the State 
collection. 
Magnetic Oxide of Iron. 
This ore abounds in Putnam county. Several mines are already 
wrought, and many more are capable of exploration They form masses 
in gneiss and hornblendic gneiss rocks, which, by casual examination 
would be called beds 5 but after a careful investigation of the facts, I 
think they may be called veins. Their course is parallel to the line of 
bearing of the strata, and they lie parallel to the layers of rock, but by 
close examination, it is found that in several instances, after continuing 
with this parallism for a certain distance, the ore crosses a stratum of 
rock, and then resumes its parallism, then crosses, obliquely,'' another, 
and so on. In other places, where a great bed of the ore occurs at 
