One who supervises the feeding and maintenance of glass-melting furnaces
(tanks), and the operation of reheating ovens (lehrs) for fire-glazing
glass articles. Directs unloading and storage of raw materials and
crushing and washing of waste glass (cullet) used as ingredients in the
manufacture of new glass. DOT
A dispersion pattern developed more or less directly over the bedrock
source. Hawkes, 2
See:methane drainage
X-ray diffractions, in addition to fundamental diffractions, which appear
as an alloy inverts from disorder to perfect order of its constituent
atoms at lattice sites; called superlattice diffractions and attributed to
a superstructure of ordered atoms. Superlattice diffractions also appear
where long-range order obtains in the stacking of silicate structural
units, such as in phyllosilicates. See:superstructure;
long-range order.
A mechanism that simulates rocking, bumping, and sluicing action used in
panning and gives precise information as to the possibility of gravity
treatment of sands. It is used in rapid assays and as a research aid.
Pryor, 2
Any of various commercial phosphate fertilizers obtained as white to gray
granules or powders by acidulating ground insoluble phosphate rock, such
as: (1) a product made by acidulating with sulfuric acid, consisting
essentially of primary calcium phosphate, calcium sulfate, and smaller
quantities of secondary calcium phosphate, and containing usually about
20% of available phosphoric acid; or (2) a product made by acidulating
with phosphoric acid, consisting essentially of primary calcium phosphate
and containing usually 40% to 50% of available phosphoric acid.
Webster 3rd
a. A principle stating that if a body is subjected to several stresses
acting simultaneously, then each stress produces its own strain or
strains, and these strains may be superimposed to give the complete state
of strain of the solid. Similarly, two separate stress distributions in a
body, due to the application of two separate stresses, may be superimposed
to give the stress distribution due to the simultaneous application of
these two stresses. Issacson
b. The order in which rocks are placed or accumulated in beds one above
the other, the highest bed being the youngest. AGI
See:overprint
Using extra large pushers, or two or even three standard units in tandem,
to increase the speed and size of loading. Nichols, 1
A solution that contains more of the solute than is normally present when
equilibrium is established between the saturated solution and undissolved
solute. AGI
Two sets of mining equipment operating simultaneously and sharing a common
dumping point on the same section, with each set being ventilated by a
separate split on intake air. FR 95
A crystal structure resulting from large unit cells when an alloy inverts
from disordered occupancy of lattice sites by "averaged" constituent atoms
in small unit cells to individual atomic species occupying specific
lattice sites and having long-range order; e.g., disordered Cu3 Au
has a primitive cubic unit cell with averaged "Cu-Au atoms" at each
corner, while ordered Cu3 Au has a face-centered cell with Au atoms
its corners and Cu its face centers, the large face-centered unit cell
containing eight of the small primitive unit cells. See:superlattice;
long-range order.
Twinning by which a crystal simulates the symmetry of a crystal class with
higher grade in the same system.
An atmosphere-supplying device that provides the wearer with respirable
air from a source that is outside of the contaminated area.
Best, 1
In anthracite and bituminous coal mining, one who directs and assists the
loading of mine supplies on a cage (elevator) at a mine having a separate
shaft or shaft compartment for handling supplies. DOT
In anthracite and bituminous coal mining, one who operates the hoisting
machinery that serves the shaft or shaft compartment of a mine in which
mining supplies are lowered into the mine. Also called supply-hoist
engineer. DOT
In bituminous coal mining, a person who operates a mine locomotive to haul
trips (trains) of cars, loaded with timbers, rails, explosives, and other
supplies, into a mine. DOT
See:bank pump
A general term for any timber, steel, concrete, brick, or stone structure
erected to counteract the subsidence of the roof strata when undermined.
See also:self-advancing supports; steel arch; steel support.
Nelson
In a crawler machine, a roller that supports the slack upper part of the
track. Nichols, 1