1divide it obliquely; however, my discourse is now
concerned mainly with
vena profunda, but most of all with the metallic material which it contains.
vena profunda, but most of all with the metallic material which it contains.
THREE VERTICAL SHAFTS, OF WHICH THE FIRST, A, DOES NOT REACH THE TUNNEL; THE
SECOND, B, REACHES THE TUNNEL; TO THE THIRD, C, THE TUNNEL HAS NOT YET BEEN
DRIVEN. D—TUNNEL.
SECOND, B, REACHES THE TUNNEL; TO THE THIRD, C, THE TUNNEL HAS NOT YET BEEN
DRIVEN. D—TUNNEL.