124

| assumption that the two outcrops already described, and those yet to be
| described, belong to the same vein is only indirectly indicated by the
disposition of the various outcrops of this and other veins and the regularity
: of the development of the veins where well exposed. On this assumption,
f No. 4 vein has a known length of 1,400 feet. The first outcrops after the
600-foot exposureless interval oceur on the rise to the second ridge where
| | several feet of ore is visible with only one wall exposed. On top of the
ridge, 120 fect farther east, the vein is exposed with a width of 30 feet with
both walls showing. From this point exposures are nearly continuous for
a length of 300 feet and in a distance of 60 feet the breadth decreases
| from 30 to 20 feet whereas beyond this it gradually diminishes until at the end
| of the stretch of continuous exposures it is less than 8 feet. In this space,
the vein at various places includes long sheets of country rock and the
+ quality of the ore is further decreased by the presence of zones rich in
i apatite, the zones and the included ribs of country rock being disposed
1 || parallel with the gently curving walls of the vein. Beyond the stretch of
| continuous exposures, outcrops are lacking for a distance of 200 feet east-
i ward, to where on the lower slopes of a gently rising hill ore is again exposed
in several narrow masses over a length of 30 feet. There are no indications
at this place that the vein is ending and it may continue for a long distance,
but in the direction of the strike outcrops are wholly wanting.

Vein No. 5 lies north of No. 4 and parallels it at a distance varying
between 50 and 80 feet. This vein is represented by two groups of exposures
separated from one another by a concealed interval of 500 feet. It is quite
possible that the two sets of exposures do not belong to one vein, but if
they do the vein is at least 600 feet long and may be much longer; for in
both directions along the strike, exposures are wanting. Only 1 or 2
feet of ore is visible at any of the exposures and it is possible that the vein

is narrow throughout its extent.

Vein No. 6 lies 75 to 100 feet north of, and roughly parallel with, No. 5
vein. It is exposed at two places separated by an exposureless interval of
275 feet. At the western exposures the vein is visible at two points 60
feet apart and varies in width between 2 and 5 feet; at the eastern exposure
ore shows for a width of 15 feet with only one wall uncovered. It seems
reasonable to suppose that this vein, like the others, extends both east and
west beyond the last visible outcrops, but im both directions exposures are
entirely wanting over a large area.

Vein No. 7 lies north of vein No. 6 and is exposed at one place only,
situated some 70 feet north of the assumed western prolongation of No. 6
vein. At the single outcrop of No. 7 vein, magnetite is exposed for a
breadth of 14 feet and a length of 6 feet with only one wall visible.

Veins Nos. 8, 9, and 10 lie north of vein No. 7 and apparently belong
to a group of veins following courses more irregular than those of the veins
so far described. The outcrops occur in a wide, drift-covered hollow running
sastward and it may be that the veins extend east along this hollow, as
seems indicated by the disposition of the more easterly of the outerops
which suggest the existence of a vein system striking “eastward along a
direction nearly at right angles to the general course of the veins already
described. If the outcrops of the second group are each considered to
indicate distinct groups of veins, then, if they extend only a short distance
westerly, their courses would cross or join the paths of the first-deseribed
veins which strike east-southeast (See Figure 23). The disposition of the