A glossary of mining and metallurgical terms

34 A GLOSSARY OF MINING AND METALLURGICAL TERMS.
Fast shot, Xewc. A charge of powder exploding without the de-
sired eifect.
Fathom, Corn. Six feet. A fathom of mininrj f/round is six feet
square by the whole thickness of the vein, or in Cornish phrase, a
fathom forward by a fathom vertical.
Faidd. The tymp-arch or working-arch of a furnace.
Fathom-tale, Corn. See Tut-icork (2). This name probably arisen
from the payment for such work by the space excavated, and not by
the ore produced.
Fault. 1. A dislocation of the strata or the vein. 2. In coal-
seams, sometimes applied to the coal rendered worthless by its condi-
tion in the seam [slate-fault, dirt-fault, etc.).
Feather. See Plug and feather.
Feathered-shot. Copper granulated by pouring into cold water.
Feathering. See Plugging.
Feeder. 1. A small vein joining a larger vein. 2. A spring or
stream. 3. A bloiccr of gas.
Feigh, Newc. Refuse washed from lead-ore or coal.
Feldspathic. Containing feldspar as a principal ingredient.
Fell. See Riddle.
Ferrie furnace. A high iron blast furnace, in the upper part of
which crude bituminous coal is converted into coke.
Ferromanganese. An alloy of iron and manganese.
Ferruginous. Containing iron.
Fettle, Fettling. See Fix.
Fillet. The rounded corner of a groove in a roll.
Fin. The thin sheet of metal squeezed out between the collars of
the rolls in a roll-train.
Fine metal. 1. See Metal. 2. The iron or plate-metal [jrodueed
in the refinery.
Finery. A charcoal-hearth for the conversion of cast into mal-
leable iron.
Fining. 1. See Refining. 2. The conversion of cast into mal-
leable iron in a hearth or charcoal-fire.
Finishing-rolls. The rolls of a train which receive the bar from
the roughing-rolls, and reduce it to its finished shape.
Fire-bars. Grate-bars in a fireplace.
Fire-bricks. Refractory bricks of fire-clay or of silicious mate-
rial used to line furnaces.
Fire-bridge. The separating low wall between the fire-place and
the hearth of a/reverberatory furnace.