The Encyclopedia Americana, Volume 7Grolier, 1985 - Encyclopedias and dictionaries |
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Page 135
... Lignite 32.5 5.0 30.8 31.7 4237 72.4 5.3 1.1 0.7 20.5 Subbituminous B 20.7 3.9 30.7 44.7 5572 77.7 5.2 1.6 0.5 15.0 High - volatile Bituminous C 11.9 8.5 36.9 42.7 6268 79.2 5.9 1.5 2.9 10.5 High - volatile Bituminous B 4.2 6.4 34.6 ...
... Lignite 32.5 5.0 30.8 31.7 4237 72.4 5.3 1.1 0.7 20.5 Subbituminous B 20.7 3.9 30.7 44.7 5572 77.7 5.2 1.6 0.5 15.0 High - volatile Bituminous C 11.9 8.5 36.9 42.7 6268 79.2 5.9 1.5 2.9 10.5 High - volatile Bituminous B 4.2 6.4 34.6 ...
Page 137
... lignite , bituminous , and anthracite . 137 Kinds of Mines . Mines may be classified by the method of entry into the coal seams . Where coal lies close enough to the surface and the costs of removing the overlying material are ...
... lignite , bituminous , and anthracite . 137 Kinds of Mines . Mines may be classified by the method of entry into the coal seams . Where coal lies close enough to the surface and the costs of removing the overlying material are ...
Page 361
... lignite , a solid whose properties are intermediate between those of peat and coal . Heat of Combustion and Flame Temperature . A basic thermodynamic property of a fuel , relevant to its usefulness in combustion , is its heat of com ...
... lignite , a solid whose properties are intermediate between those of peat and coal . Heat of Combustion and Flame Temperature . A basic thermodynamic property of a fuel , relevant to its usefulness in combustion , is its heat of com ...
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