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United States Bureau of Mines
Industria: Mining
Number of terms: 33118
Number of blossaries: 0
Company Profile:
The U.S. Bureau of Mines (USBM) was the primary United States Government agency conducting scientific research and disseminating information on the extraction, processing, use, and conservation of mineral resources. Founded on May 16, 1910, through the Organic Act (Public Law 179), USBM's missions ...
A polarizing microscope in which light is transmitted by the crystal parallel to the microscope axis, in contrast to the conoscope, in which a converging lens and Bertrand lens are used. Compare: conoscope
Industry:Mining
A polarizing microscope using convergent light with the Bertrand lens inserted, used to test the interference figures of crystals. Compare: orthoscope
Industry:Mining
A pole of nonsparking material used to tamp in blast holes.
Industry:Mining
A pole of nonsparking material used to tamp in blast holes.
Industry:Mining
A pole projecting backward and downward from a vehicle, to prevent it from running backward.
Industry:Mining
A pole that forms the prop of a hoisting gin and stands facing the windlass.
Industry:Mining
A pole with teeth in it, which revolves in a puddling trough to puddle auriferous clay.
Industry:Mining
A polishing material consisting of 99% Fe<sub>3</sub>O<sub>4</sub>.
Industry:Mining
A polygon having eight sides.
Industry:Mining
A polygon having equal sides, and the angles between these sides are equal.
Industry:Mining
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