No. 275 .J 111 
ore has also been worked to the extent of several thousand tons, near 
the road, and north of the little stream mentioned above as crossing the 
vein. The vein here is from 8 to 14 feet thick, and nearly vertical 
in position, between strata of gneiss and hornblendic gneiss, which 
dip 70° to 85° to the ESE. On Simewog hill, one-fourth of a mile 
south, the vein, is from 3 to 20 feet thick, associated with similar rocks 
and with granite. It has been wrought on Simewog hill from 30 to 
60 feet or more in depth over a length of 300 to 400 yards. It is 
scarcely doubted, from the observations made, that this vein is at 
least two miles in length, with an average wadth of 6 feet. Its 
depth cannot be estimated, but it is presumed that the labor of ages 
could not exhaust it in depth, as the bottoms of such veins have never, 
in any country, been found. In the estimates above, the calculation is 
based upon the vein being wrought down to the water level of the ad- 
jacent valley. 
Tke Philips vein has been traced at short intervals for about eight 
miles, and is presumed to be continuous through this distance, except 
where it is interrupted by dykes and transverse heaves of the strata. — 
Many mines have been opened on this vein, and several of them are now 
worked. 
The Cold spring and Patterson turnpike crosses this vein of iron ore 
near the crest of the mountain, about nine miles from Cold Spring land- 
ing. There is an opening near the road, and near this crossing, where 
some ore has been dug. Here the ore seems injected in little sheets, 
veins and beds through the gneiss rock, so as to form one-fourth to 
three-fourths of its mass through a horizontal thickness (as the strata 
are vertical) of 30 to 35 feet. Pyrites abound in a portion of the bed. 
The ore is easily traced along its course, as it shows itself distinctly 
along the line of bearing of the strata, disseminated, and forming black 
stripes in the rock. Near the house, one or two hundred yards farther 
SSW, another small opening has been made; 100 to 200 yards farther 
SSW on the line of the vein, a larger excavation has been made, and 500 
to 800 tons of the ore thrown out, but it is here so much intermixed 
with pyrites as to be unfit for smelting, until the pyrites shall have de- 
composed. Some hundred yards farther SSW on the line of the vein, 
another opening has been made next the marsh, and is continued down 
the hill. The ore is here more or less intermixed with the rock, with 
a breadth of 10 to 20 feet, and the gneiss and hornblendic gneiss rocks 
associated, dip to the ESE at an angle of about 60°. 
