Agricola, Georgius, De re metallica, 1912/1950

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1 37[Figure 37]
A—THEBEGINNING. B—THEEND. C—THEHEAD. D—THETAIL.
E—TRANSVERSE
VEIN.
A vena cumulata has abeginning, anend, ahead, and a
tail, just as a vena profunda. Moreover, a vena cumulata, and likewise
a
vena dilatata, are often cut through by a transverse vena profunda.
Stringers (fibrae)6, which are little veins, are classified into fibrae trans­
versae
, fibrae obliquae which cut the vein obliquely, fibrae sociae,
fibrae
dilatatae, and fibrae incumbentes. The fibra transversa crosses
the
vein; the fibra obliqua crosses the vein obliquely; the fibra socia joins
with
the vein itself; the fibra dilatata, like the vena dilatata, penetrates
through
it; but the fibra dilatata, as well as the fibra profunda, is usually
found
associated with a vein.
The fibra incumbens does not descend as deeply into the earth as the
other
stringers, but lies on the vein, as it were, from the surface to the
hangingwall
or footwall, from which it is named Subdialis.7

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