Daily Los Angeles herald., 1881-09-01
Mining Terms.

1a6 lCiiOWibB 10 III cAPioh0sich
of some of the principal terms used
in mining:
Adit--A tunnel on vein or lode;
q passage for water underground.
Bed-ruck--The bed of metalifer-
GUS deposit, commonly applied to
the slate underlying auriferous
gravel.
Blind lode-One that shows no
surface croppiLgs.
Breasting-TakiDg ore from the
face of q mine or head of a drift.
Csge-The elevator used for hoist
ing or lowering the ore cars, men
aud material OF mine.
Cap-rock-The formation over
laying the pay dirt or ore.
Chute-An incline or opening
from one level tn another, through
which ore is passed.
Contact lode-A lode lying be.
tween two different kinds of rock,
as, for example, porphyry and
slate.
Croppings-Ledge matter lying
upon the surface, or the outcrop-
pings of vein.
Cross. DRIFT rDnniDg at
right angles to the ledge for the
purpose of ascertaiDing its width
and to otherwise prospect IL; also
an opening or level driven across
the ground from one vein to an
other.
Deposit-A body of orei distinct
from q ledge; o pocket of gravel or
pay dirt; dead-w ork-work of put
ting a mine in order and driving
shafts and levels in search OF pay,
or to open up a mine; drifts-tun.
nels leading off from the main
shaft or from ether tunnels or lev
els through and along the vein;
dump-the place where ore is de-
posted after being taken from the
mine.
Fiume--BoxiDg or piping for
conveying water; free gold gold
easily separated from the quartz or
dirt; foot wall-the lover wall or
side of lode or vein.
Hanging wsll-Pbe upper wall;
the rock or wall resting on the lode
or vein; horse-a mass of wa 4 rock
or other barren matter obtruding
into an unbearing lode or fissure.
Ledge-A lode or vein; level
drifts from the main shaft or from
one shaft to another; an excava-
ton run on the ledge, vein or ore
body, at distances OF from fifty to
one hundred feet apart and high
enough for men to work in; lode
longitudinal fissure or chasm
filled with ore-bearing matter and
having weil-defined side walls;
lode, lead, vein and ledge are sy-
noDymous.
Petering-The giving out Of an
ore body; placers--alluvial deposits,
earth containing gold dust; por-
pbyry--a barren rock, stratitied
reddish, purple or green rock, in
which crystals are embedded; pan
or panning-usualIy, to wash the
dirt from the free gold with a pan.
Notwithstanding from for
eign substances; the reduction OF
ores consists in extracting from
them the metals they contain; re-
serves-ore reserves are the vein
material still standing in the mine
between the shafts and levels that
have been driven in or through the
vein.
Shaft-A vertical or incline ex
cavation for prospecting or work.
ing mines; stoping-breaking ore
from a stope or section Of ground
in mine between or above levels
Tailings-The auriferous earth
that has once been washed and de-
prived of the greater portion OF the
gold it contained; the shines and
sulphurets that escape from the
mills.
Understanding d drift up
wards or rising above shaft oil
level, instead Of sinking.
Wipze-A shaft connecting one
drift or level with another, but moi
reaching to the surface.
Wall-Boundary of vein, lode oil
ledge and inclosing the same.