A glossary of mining and metallurgical terms

20, A GLOSSARY OF MIXING AND METALLURGICAL TERMa.
Chlorides, Pac. A common term for ores containing chloride of
silver.
Chloridize. To convert into chloride. Applied to the roastinor
of silver ores with salt, preparatory to amalgamation.
Chlorination process. The process first introduced by Plattner,
in which auriferous ores are first roasted to oxidize the base metals,
tli^n saturated with chlorine gas, and finally treated with water,
which removes the soluble terchloride of gold, to be subsequently
precipitated and melted into bars.
Chrome ore. Chromic iron (chromite, oxide of chromium and
oxide of iron).
Chute. (Sometimes written sAoo^.) 1. A channel or shaft under-
ground, or an inclined trough above ground, through which ore falls
or is "shot" by gravity from a higher to a lower level. 2. A body
of ore, usually of elongated form, extending downward within a vein
(ore-shoot). The two forms of orthography of this word are of
French and English origin respectively. Under chide, the original
idea is that of falling; under shoot, that of shooting or branching.
Both are appropriate to the technical significations of the word. An
ore-shoot, for instance, may be considered as a branch of the general
mass of the ore in a deposit, or as a pitch or fall of ore (Germ. JErz-
fall). In England the orthography shoot is, I believe, exclusively
employed, and this is perhaps the best, the other being unnecessarily
foreign.
Cinder, Eng. Slag, particularly from iron blast furnaces.
Cinder-pig, Eng. See Pig iron.
Cinder-plate. See Bloornary.
Cinder-tap, Cinder-notch. The hole through which cinder is tapped
from a furnace. See Liirmann front.
Cinnabar. Sulphui'et of mercury.
Cistern, Corn. See Tank.
Clack, Corn. A pump- valve.
Clack-door, Corn. An opening into the valve-chamber of a
pump.
Claggy, Newc. Adhesive. When the coal is tightly joined to
the roof, the mine is said to have a claggi/ top.
Claim, Pac. The j)ortion of mining ground held under the Fed-
eral and local laws by one claimant or association, by virtue