A—SOLID VEIN. B—SOLID STRINGER. C—CAVERNOUS VEIN.
D—CAVERNOUS
STRINGER. E—BARREN VEIN. F—BARREN STRINGER.
STRINGER. E—BARREN VEIN. F—BARREN STRINGER.
But to return to veins.
A great number of miners consider8
that the
best veins in depth are those which run from the VI or VII direction of the
east to the VI or VII direction of the west, through a mountain slope which
inclines to the north; and whose hangingwalls are in the south, and whose
footwalls are in the north, and which have their heads rising to the north,
as explained before, always like the footwall, and finally, whose rock
seams turn their heads to the east. And the veins which are the next
best veins in depth are those which run from the VI or VII direction of the
east to the VI or VII direction of the west, through a mountain slope which
inclines to the north; and whose hangingwalls are in the south, and whose
footwalls are in the north, and which have their heads rising to the north,
as explained before, always like the footwall, and finally, whose rock
seams turn their heads to the east. And the veins which are the next