Containing lead. Webster 3rd
Transferring a point at one level to a point vertically below or above it
by means of a weight (plumb bob or plummet) suspended at the end of a
string or wire (plumbline). See also:centering of shaft; string survey.
Nelson
A device used to produce a vertical line between a survey instrument and
the reference point over (or sometimes under, in underground work) which
it is set. Special plumblines are used in a vertical shaft to transfer a
fixed or an azimuth angle from the surface to underground workings for the
purpose of orientation. Also known as plumb bob; plummet.
See also:Weisbach triangle
A variety of calcite containing a small amount of lead carbonate.
A trigonal mineral, PbFe4 O7 ; black; at Jakobsberg, Sweden.
A trigonal mineral, PbAl3 (PO4 )2 (OH)5 .H
2 O ; crandallite group; forms yellow to brown encrustations; in
Cumberland, United Kingdom.
A trigonal mineral, PbFe6 (SO4 )4 (OH)12 ;
alunite group; forms minute brown tabular crystals with rhombohedral
cleavage.
An isometric mineral, (Pb,Ca,U)2 Ta2 O6 (OH);
pyrochlore group. It occurs in greenish-yellow and orange masses and
octahedra from Kivu, Zaire.
Of, pertaining to, or containing lead, esp. in its lower valence.
CF:plumbic
Mineral concentrator in which air is pulsed upward through a porous deck
by means of a rotary valve. Pryor, 3
One of the vertical posts at the side of a tunnel resting on sills and
carrying the wallplates; collectively, they support the tunnel roof by
means of centering. Stauffer
A feathery variety of jamesonite. See also:plumose antimony
See:plumbline
Having a feathery appearance. Fay
A feather-ore variety of jamesonite or boulangerite; also called feather
ore. Also spelled plumites, plumosite.
A feathery variety of muscovite.
A feathery variety of jamesonite or boulangerite.
Corn. A corruption of the word pump.
See:puddingstone
a. The vertical angle between a horizontal plane and the line of maximum
elongation of an orebody.
b. The inclination of a fold axis or other linear structure, measured in
the vertical plane. CF:apparent plunge; dip. AGI
c. To set the horizontal cross wire of a theodolite in the direction of a
grade when establishing a grade between two points of known level.
AGI
d. To reverse the direction of the telescope of a theodolite by rotating
it 180 degrees about its horizontal axis. Syn:transit
a. In blasting, a rod designed for thrusting into a drill hole and
ascertaining the position of a cartridge. Standard, 2
b. The piston of a force pump. Fay
c. A piston and its attached rod. Long