MAGNETIC OXIDE OF IRON. 
19 
of the magnetic separating machine. With this previous preparation, it is considered one of 
the best ores in this district. 
Cook Mine. This traverses a hill three miles northwest from Clintonville. There are here 
two parallel veins, only four or five feet distant from each other ; the one of which is not more 
than two feet wide ; the other, more recently discovered, is thirteen feet wide. There are also 
three other veins, parallel with the last, one six feet wide, another three, and another two feet. 
The ore is black, sometimes granular and soft; at others, compact, or in firm masses. It is 
strongly attracted by the magnet, and possesses polarity. The gangue of the ore is quartz, 
black mica and hornblende, and these are so intimately mixed with the ore as to require their 
separation by washing, or by the magnetic machine. It then yields iron of an excellent 
quality.* 
Baltic Mine. This, although a mile and a half from the Cook Mine, is to be considered as 
a part of the same deposit, the connexion being traceable by surface ore. Several openings 
have been made in the immediate vicinity of each other, and there is probably a large quantity 
of ore. It is, however, more or less mixed with iron pyrites. The gangue is entirely similar 
to that of the preceding. 
Rutgers Mine. This is situated about eight miles west of Clintonville, in one of the primary 
ranges. The vein is about ten feet wide, and the gangue or mineral matter associated with 
the ore is said to be peculiar, and is thought by Dr. Emmons to be new. The course of this 
vein is parallel with that of the Arnold and Cook veins ; but as the ore does not yield so good 
an iron as some others, it is not at present worked. 
Winter Mine. This has been thought to differ in its character from the other deposits of 
ore in this district, as it appears like a thick plate covering several square rods of the rock 
with which it is associated, or, as Dr. Emmons expresses it, as if it was deposited horizon¬ 
tally on the rock, like an overflowing melted mass of lava. This gentleman states, however, 
that' it presents no appearances which, in reality, differ from those attending the ordinary veins. 
The layer or mass of ore just noticed, is about one hundred feet in length by forty in 
breadth, and two or three feet in thickness. This was found to be underlaid by masses of 
lean ore, exhibiting the parallel bands or stripes which characterize other veins. The deposit 
is every where traversed by transverse dykes; and since the removal of the rich superficial 
mass of ore, there does not seem to be much inducement for working it. 
To those now described may be added the Mace, the Burt, the Jackson and the McIntyre 
veins, or mines, which occur in the same district, but which are probably of secondary im¬ 
portance. 
The Skinner Mine, situated about three miles north of the Saranac river, and about seven 
miles from Cadyville, is represented as an inexhaustible deposit of the richest magnetic ore. 
It is coarsely granular, has a dull metallic lustre, and is but slightly magnetic. It yields a 
tough and valuable iron.t The accompanying rock is a reddish granite ; but the ore, according 
* Emmons. New-York Geological Reports , 1840. 
t B. S. Roberts, in the Report of the Commissioners to survey the route of the Ogdensburgh and Champlain railroad. Docu¬ 
ments of the New-York Legislature, 1841. 
