1also are able to signify the intermediate
directions by means of the names of
the winds. For instance, if a vein runs from VI east to VI west, it is said
to proceed from Subsolanus (east wind) to Favoníus (west wind); but one
which proceeds from between V and VI of the east to between V and VI
west is said to proceed out of the middle of Carbas and Subsolanus to between
Argestes and Favoníus; the remaining directions, and their intermediates
are similarly designated. The miner, on account of the natural properties
of a magnet, by which the needle points to the south, must fix the instru
ment already described so that east is to the left and west to the right.
the winds. For instance, if a vein runs from VI east to VI west, it is said
to proceed from Subsolanus (east wind) to Favoníus (west wind); but one
which proceeds from between V and VI of the east to between V and VI
west is said to proceed out of the middle of Carbas and Subsolanus to between
Argestes and Favoníus; the remaining directions, and their intermediates
are similarly designated. The miner, on account of the natural properties
of a magnet, by which the needle points to the south, must fix the instru
ment already described so that east is to the left and west to the right.
In a similar way to venae profundae, the venae dilatatae vary in their
lateral directions, and we are able to understand from the seams in the
rocks in which direction they extend into the ground. For if these incline
toward the west in depth, the vein is said to extend from east to west;
if on the contrary, they incline toward the east, the vein is said to go from
west to east. In the same way, from the rock seams we can determine
veins running south and north, or the reverse, and likewise to the
subordinate directions and their intermediates.
lateral directions, and we are able to understand from the seams in the
rocks in which direction they extend into the ground. For if these incline
toward the west in depth, the vein is said to extend from east to west;
if on the contrary, they incline toward the east, the vein is said to go from
west to east. In the same way, from the rock seams we can determine
veins running south and north, or the reverse, and likewise to the
subordinate directions and their intermediates.
A, B—Venae dilatatae.
C—Seams in the Rocks.
Further, as regards the question of direction of a vena
profunda, one
runs straight from one quarter of the earth to that quarter which is opposite,
while another one runs in a curve, in which case it may happen that a vein
proceeding from the east does not turn to the quarter opposite, which is the
west, but twists itself and turns to the south or the north.
runs straight from one quarter of the earth to that quarter which is opposite,
while another one runs in a curve, in which case it may happen that a vein
proceeding from the east does not turn to the quarter opposite, which is the
west, but twists itself and turns to the south or the north.