and thin beds, intervened with fhiftus. The
latter is a£ted on by the atmofphere, and
from its expofed fituation, foon decom-
pofes, and falls in great quantities, whence
Mam Tor 'has been called the fhivering
mountain. The inclination is about one
foot in fifteen to the fouth.
The ftratum of fhale, or fhiftus makes
its appearance underneath the grit; and at
the north end of the mountain B is a vein
of ore called Oden, a mine as reprefented
at O. This is a long rake vein of lead ore,
running from weft to eaft, and underlying
or hading fouth. It is faid to be a very
ancient mine worked by the Saxons. The
operations are conducted horizontally, the
ore being cut out more than a mile from
the entrance; in fome places 60 yards below
the level or horizontal entrance, and in
fome places as much above it. This vein
is of various thicknefs, fometimes eight
feet,
feet, at others not above four inches, when
it is divided by a rider, as at r. Lead ore
in great quantities, with many fine cryftal-
lizations of blende, barytes, fluor, calcareous
fpar, felenite, &c.
The entrance of this mine is in the lime-
ftone; and the ftrength of the vein extends
it into the fhale, which it foon leaves, and
then comes into the limeftone, again. The
vein is in fome places divided by the hard
limeftone called rider: in which cafe the
miners, following the divided veins, work
by each fide of the rider, perhaps more than
a hundred yards, till the veins again unite.
The lead ore produces.about 60 per cent;
and the mine employs about ioo people,
who chiefly Tefide in Caftleton, and are, in
general, intelligent men. It is eafy of ac-
cefs, and the manager is always anxious to
fatisfy the curiofity of thofe who wifh to
vifit