One-thousandth of a second; abbrev.: msec; ms. Webster 3rd
A type of delay cap with a definite but extremely short interval between
the passing of current and the explosion. Nichols, 1
A detonating cap that fires from 0.02 to 0.5 s after the firing current
passes through it. Nichols, 1
One-thousandth of a volt; abbrev., mV. Crispin
One who is employed in a mill, such as in an ore-dressing plant.
Fay
See:milling ore
One of the rolls through which puddled iron is run prior to being
marketed. Standard, 2
a. A given quantity of ore tested for its quality by actual milling; the
yield of such a test. Craigie
b. Average, not esp. selected. Craigie
c. In intermittent treatment of ore, with periodic cleanup, the period of
such a run. Bulk test on a sample of ore during development of a treatment
process. Pryor, 3
A laborer who removes samples of crushed ore, concentrates, or tailings at
various stages of processing, and puts them in labeled containers for
laboratory analysis. Also called sampler. DOT
The scale of ferric oxide that peels from iron during rolling.
Standard, 2
Method of regeneration of foul cyanide liquor from the gold leaching
process. The barren solution is acidified, and gaseous hydrocyanic acid
(HCN) is liberated, separated, and reabsorbed in an alkaline solution,
such as lime water. Pryor, 3
a. A shoe equipped with a hardened serrated cutting edge used to mill
downward over and around a piece of drill-stem equipment lost in a
borehole. See also:mill
b. A shoe designed either to dress the down-hole tools for access to
retrieve them, or to grind up the tool in a drill hole so that drilling
can continue.
Term used in the slate industry to include all forms of structural slate
used in exterior or interior construction.
A buhrstone; e.g., a coarse-grained sandstone or a fine-grained quartz
conglomerate. Also, one of two thick disks of such material used for
grinding grain and other materials fed through a center hole in the upper
stone. Quarried underground in Virginia; also, produced in New York and
(of granite) in North Carolina. See also:buhrstone
Any hard, siliceous rock suitable for use as a material for millstones;
specif. the Millstone Grit of the British Carboniferous, a coarse
conglomeratic sandstone. AGI
The determination of the metallic contents and recoverable metal in any
given ore by the milling of a sufficient quantity to afford average
milling conditions. See also:mill run
Net tonnage of ore available for milling after eliminating waste and
unpayable material. Beerman
S. Afr. The calculated value of ore before crushing. After treatment,
there remains a residue of the valuable metal in the sands, slimes, or
tailings, which, added to the yield obtained by treatment, should be equal
to the mill value. Beerman
See:mimetite
See:mimetite