112

for 60 feet to where it is only 8 inches thick and seems to end. The main
vein is exposed 75 feet to the west with a thickness of 5 feet and is exposed
with this width at intervals over a length of 50 feet. Farther west along
the vein the magnetite in one place has an exposed width of 20 feet and
what appear to be one or more narrow branch veins are exposed to the
south of it. The last exposures definitely assignable to No. 3 vein occur a
little farther along the strike and there the vein is not more than 5 feet
wide. Apparently at the two places where the vein forks, the ore mass
notably increases in width, forming, it is estimated, one lenticular body
120 feet long and 25 feet broad and a second body 100 feet long with a
thickness increasing gradually from 5 to 10 feet.

Vein No. 4. May be a continuation of vein No. 3. It has a width
of about 2 feet, and is exposed over a length of 20 feet.

Vein No. 5. Vein No. 5, still farther west, is possibly a continuation,
along a curving course, of vein No. 4. It has a width of 2% feet and is
exposed over a length of 30 feet. It is not known to outcrop to the west.

Vein No. 6. Vein No. 6 lies north of the eastern end of vein No. 2.
It is exposed in three places in a length of 150 feet. At the easternmost
exposure the vein is less than 2 inches wide and appears to end. At the
westernmost exposure the vein is 5 feet wide and possibly, therefore,
extends some distance farther, perhaps to join No. 3 vein.

Vein No. 7. Vein No. 7 is exposed at two places in a length of 150
feet and where visible has a width of 3 feet. It appears to parallel the
main vein No. 8 and presumably extends both east and west of its outcrops.

Vein No. 8. Vein No. 8 is the vein on which the deep open-cut has
been made and along which the 150-foot tunnel has been driven. The
vein is exposed by the open-cut for a length of 360 feet and is exposed
intermittently for a farther length of 290 feet. The eastern end of the
vein is not exposed, but it presumably lies somewhere between the tunnel
mouth and the east side of the gully into which the open-cut opens, for the
vein almost certainly does not continue eastward across the gully.
At the tunnel mouth the vein is about 15 feet wide, much of it is rich in
apatite, but a zone about 5 feet thick is nearly pure magnetite. At the
face of the tunnel, 150 feet in, the vein is fully 15 feet wide, but forward
of the tunnel end in one place contracts or holds a horse of country rock.
At the surface a 3-foot vein lies a few feet north of the main vein and
underground the main vein appears to split and to be paralleled by another
vein. The western part of the open-cut is wider than the Secon part
and presumably the vein is wider in the west. About midway along the
open-cut w here it makes a vight-angle turn, the vein has a width of 35 feet
and as seen on the walls consists of band-like, comparatively pure masses of
magnetite striking parallel with the vein and alternating with zones very
ric +h in magnetite and with bands or horses of country rock. This point
in the cut is about 140 feet above and nearly vertically over the tunnel
face. Towards the west end of the cut, the floor is exposed and there
towards the middle of the cut country rock i is expose d for a width of 5 feet
with, on the north side, a vein of magnetite 5 feet wide and apparently
increasing in width westward. On the south side of the rock parting is a
wider vein which appears to narrow westward along the strike and
owing to local decrease in the angle of dip gradually diverges from the
north vein. At the west end of the open-cut there is a vertical rock face