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United States Bureau of Mines
行业: 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 ...
Not taking a fixed or definite position or direction; as an instrument in which a negative restoring force has been applied so as to aid any deflecting force, thereby rendering the instrument more sensitive and/or less stable.
Industry:Mining
Notched bars of commercial copper used for casting purposes. The notches are provided for convenience in breaking the bars.
Industry:Mining
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Nothing; zero. Often used in reporting gold and silver assays.
Industry:Mining
Number of particles in unit volume of pulp.
Industry:Mining
Number of resettable diamonds salvaged by cutting out of worn or used diamond bit.
Industry:Mining
Numerical or written description of ocean surface roughness.
Industry:Mining
Oak immersed in peat bogs, semifossilized and blackened to resemble ebony by iron from the water combining with the tannin of the oak.
Industry:Mining
Observed result of magnetizing a ferromagnetic substance by means of a slow magnetic field increase. Orientation of domains proceeds in abrupt steps.
Industry:Mining
Obsidian or other volcanic glass.
Industry:Mining
Obsidian that occurs as rounded to subangular bodies, usually less than 2 in (5.1 cm) in diameter and having indented surfaces. These bodies occur in masses of perlite and are of special interest because of their low water content as compared with the surrounding perlite. The name is from the Marekanka River, Okhotsk, Siberia, Russia.
Industry:Mining
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