A glossary of mining and metallurgical terms

A GLOSSARY OF MINING AND METALLURGICAL TERMS. 45
lar drill in a bore-hole, or for recovering tools, fragments, etc., fallen
into the hole.
Grampus, U. S. The tongs with which bloomary loups and billeta
are handled.
Granzas, Sp. Small pieces of ore.
Graphite. A crystalline form of carbon.
Graphitic carbon. That portion of the carbon in iron or steel
which is present as graphite.
Grass, Corn. The surface over a mine. Bringing ores to grass
is taking them out of the mine.
Grassero, Sp. A slag-heap.
Grate, Corn. See Screen (as applied to stamps).
Grate coal, pENN. See Coal.
Gravel-mine, U. S. An accumulation of auriferous gravel.
Ch'ueso, Sp. Lump ore. The term is in use at the quicksilver
mines of California.
Green sand. Sand u.sed for moulds without previous drying or
mixture.
Gh^iy ore, CoRN. Copper-glance. See Copper-ores.
Gray slay. The slag from the Flintshire lead furnace. It is rich
in lead.
Griddle, Corn. A miner's sieve to separate ore from halvans.
Grip. A small, narrow cavity.
Grizzly, Pac. A grating to catch and throw out large stones
from sluices.
Groove or Crave. 1. Derb. A mine; from the Germ. Ch'ube.
See Roll.
Ground, CORN. The rock in which a vein is found; also, any
given portion of the mineral deposit itself.
Growan, CORN. Decomposed granite ; sometimes the granite rock.
Gubbin. A kind of ironstone.
Crundy. Granulated pig iron.
Guard. A support in front of a roll-train to guide the bar into
the groove, sometimes called a side-guide.
Guides. 1. The timbers at the side of a shaft to steady and guide
the cage. 2. The holes in a cross-beam through which the stems
of the stamps in a stamp-mill rise and fall. 3. In a rolling-mill a
guide is a wedge-shaj>ed piece held in the groove of a roll to prevent
the sticking of the bar by peeling it out of the groove. When the
guide is held by a hanger or counter-weight against the under side
of the roll, it is called a hanging-guide.