36 
This bed is worked by levels or burrows carried in various di- 
rections through the hiH in which it is situated. These excava- 
tions have ahx'ady extended to the distance of ninety or an hundred 
feet from the entrance. The roof of these burrows is from twelve 
to thirty feet above the floor, and is supported b}' pifhirs of ore, 
from five to ten feet in thickness. The ore alternates wiih the 
clay and slate, and from what I subsequently observed, I infer that 
the 1 ed rests upon mica slate, although I did not find that rock in 
the immediate vicinity. Independently of the interest which this 
locality. possesses in a mineralogical point of view, the judicious 
manner in which the mining operations are conducted, renders it 
worthy of particular notice. 
Chve Ore Bed, — This is an extensive dcposite of brown hema- 
tite, situated in the south-western part of the town of Unionvailc. 
The general appearance of the hill in which this occurs docs not 
differ much from that of the Fishkill ore bed, but it appears to be 
more extensive, at least it has been more extensively explored. 
In most instances it has been worked to the day ; large excavations 
having been made in various places, which communicate with some 
central point by means of roads or rail-ways. The Dover Iron 
Company have, however, sunk a well or shaft, and are construct- 
ing a level to intersect it, a mode of working which promises to 
be highly advantageous. The ore is in general similar to that 
found at the Fishkill bed, but perhaps there is a larger proportion of 
the ocJunj, or Jine ore, as it is here called, which is usually consi- 
dered more valuable than the other varieties. 
Foss' Ore J5er/.-— Proceeding from the Clove bed in a north-west- 
ern direction, after crossing Chesnut Ridge, we come to adeposite 
of ore known by the above name, in the town of Dover, about a 
mile and a half W. S. W. from the furnace of the Dover Iron 
Company. This bed is situated in a valley between two spurs of 
the mountain which passes through this part of the county, and it 
is particularly interesting, as showing the association of the hema- 
tite with the mica slate, which occurs here in strata of some thick- 
ness, and contains garnets of various sizes. In extent, however, 
this bed appears to be inferior to either of those already noticed. 
The ore is in much larger masses, and is not only more difficultly 
reduced to powder, but contains a larger propoition of foreign 
substances. 
