ST. LAWRENCE COUNTY. 
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sedimentary rocks ; hence the opinion which has been sometimes expressed, that the specular 
ore is more nearly connected with the potsdam sandstone than the primary, is not supported 
by the facts of these two veins. 
The following cut will serve to illustrate the relation of the veins of ore under consideration : 
6, Tate vein; a , Serpentine; d , Gneiss; c , Policy vein. 
The similarity of these veins to those of Parish and Kearney, is carried out by the pre¬ 
sence of serpentine. 
Another vein of the specular oxide has been found upon the farm of Mr. Hitchcock, about 
three miles west from Dekalb village. At this place only a few openings have been made ; 
they were insufficient to enable me to form an opinion of the amount of ore. It is in gneiss, 
and unconnected with the potsdam sandstone. 
Magnetic Ores. 
This species of ore is found only in the eastern part of the county, where, in the circuit 
of fifteen or twenty miles, several veins are known to exist. They are all in the unsettled 
parts of this district, and have not been examined with a particular reference to their value. 
They are of course in a region which is well wooded, and favorable in all respects to the 
manufacture of iron, except the distance from market, and the heavy expenses which must 
be met in so much land transportation. At present it seems unwise to attempt the manufac¬ 
ture of iron so distant from water communication, unless the ore possesses more than ordi¬ 
nary value. 
Magnetic Ore of Chamont. 
In the township of Chamont, in the southeast part of this county, one of the largest ore 
beds in the county has long been known. Twenty-two or three years since, a large quantity 
of the ore was transported to Canton for reduction. It is situated upon the Oswegatchie river, 
near the crossing of the Albany road. The vein is in a hill or rocky eminence running east 
and west, about one hundred feet high on the south side, and fifty on the north side. The 
top of the ridge is a naked and smooth rock, about fifty rods wide, and near a mile in length. 
The whole of the hill is magnetic iron and quartz or white flint, a pepper and salt mixture. 
Some parts are richer in iron than others, but none are destitute. Some portion of the mass 
is nearly a pure oxide, a magnet taking up about ninety per cent.; while others yield, by this 
mode of trial, only fifty per cent. The ore is fine-granular, the grains being only of the size 
of white mustard seed. 
