An iron lever with a chain attached by which props are withdrawn.
Fay
a. A large, irregular nodule, usually of clay ironstone, sometimes
containing fossils, found in a sedimentary rock, as in the Jurassic rocks
of Yorkshire, England. AGI
b. An English term for any large, lumpy mass of sandstone longer than it
is broad, with steep rounded sides. AGI
A small opening from one place in a coal mine to another; smaller than a
breakthrough. Syn:monkey hole
Name applied to small coal mines that employ fewer than 15 miners. The
so-called dogholes are most numerous in Kentucky, but there are many in
Virginia and West Virginia.
See:doghole mine
a. A strong hook or wrench for separating iron boring rods. Fay
b. An iron bar with a bent prong used in handling logs. Fay
a. The structure enclosing the drill platform and machine. Long
b. A small shelter in which members of a drill crew change clothing.
CF:changehouse
c. See:forechamber
d. Any enclosure or small chamber in a mine used for storage or resting.
A short bar of iron with both ends pointed and bent down so as to hold
together two pieces of wood into which the points are driven; or one end
may be bent down and pointed, while the other is formed into an eye, so
that if the point be driven into a log, the other end may be used to haul
on. Zern
a. An abrupt angular change in course or direction, as of a borehole or in
a survey traverse. Also, a deflected borehole, survey course, or anything
with an abrupt change in direction resembling the hind leg of a dog.
AGI
b. An abrupt bend or kink in a wire rope or cable. Long
c. An abrupt bend in a path, piping system, or road. Long
Same as deflection angle; hole curvature. Long
a. Eng. In the plural; bits of wood at the bottom of an air door.
Fay
b. See also:dog
A spike generally used to fasten rails to the sleepers when laying track.
Their length should be 1/2 in (1.27 cm) less than the depth of the sleeper
into which they are being pounded. Sinclair, 5
Calcite with sharp scalenohedral termination.
Calcite in acute scalenohedral crystals facing like dogs' teeth into an
open cavity or vein. See also:scalenohedron
Eng. Foulness, or damp air. Fay
A division of a parcel of ore. Also spelled dol. Fay
a. In the United States, a syn. of diabase. AGI
b. In British usage, the preferred term for what is called diabase in the
United States. Etymol: Greek doleros, "deceitful," in reference to the
fine-grained character of the rock that makes it difficult to identify
megascopically. CF:diorite; trap. Syn:whin
a. Of or pertaining to dolerite. See also:ophitic
b. A preferred syn. of ophitic in European usage. AGI
A monoclinic mineral, Cu2 (SO4 )O ; brown; reported at Mt.
Vesuvius. Also spelled dolerophane.
See:doline
A syn. of sinkhole. Also spelled: dolina. Etymol: German transliteration
from Slovene "dolina," "valley." AGI