 Geological Survey for what has generally been called "black lignite." The latter term is objectionable for the reason that the coal is not lignitic in the sense of being woody, and the use of the term seems to imply that the coal is little better than...  American Fuels ... - Σελίδα 8των Raymond Foss Bacon, William Allen Hamor - 1922 - 1257 σελίδεςΠλήρης προβολή - Σχετικά με αυτό το βιβλίο
 | United States. Bureau of Mines - 60 σελίδες
...the coal is not lignitic in the sense of being woody, and the use of the term seems to imply that the coal is little better than the brown, woody lignite of North Dakota, whereas many of the coals of this class closely approach the lowest grade of bituminous coal. In fact, it is extremely... | |
 | 1913 - 840 σελίδες
...the coal is not lignitic in the sense of being woody, and the use of the term seems to imply that the coal is little better than the brown, woody lignite of North Dakota, whereas many of the coals of this class closely approach the lowest grade of bituminous coal. In fact, it is extremely... | |
 | 1914 - 794 σελίδες
...the coal is not lignitic in the sense of being woody, and the use of the term seems to imply that the coal is little better than the brown, woody lignite of North Dakota, whereas many of the coals of this class closely approach the lowest grade of bituminous coal. In fact, it is extremely... | |
 | 1915 - 1010 σελίδες
...the coal is not lignitic in the sense of being woody, and the use of the term seems to imply that the coal is little better than the brown, woody lignite of North Dakota, whereas many of the coals of this class closely approach the lowest grade of bituminous coal. In fact, it is extremely... | |
 | Charles Kenneth Leith - 1921 - 492 σελίδες
...separate bituminous coal from coals of lower rank is the manner in which it is affected by weathering. Subbituminous. The term "subbituminous" is adopted...loss of moisture and the consequent breaking down o • 122 " slacking " that it undergoes when subjected to alternate wetting and drying. Lignite. The... | |
 | North Dakota - 1924 - 1208 σελίδες
...generally been called 'black lignite,' a term that is objectionable because the coal is not lignite in the sense of being distinctly woody, and because...bituminous coal. Sub-bituminous coal is generally distinguished from lignite by its black color and its apparent freedom from distinctly woody texture... | |
 | 1913 - 610 σελίδες
...the coal is not lignitic in the sense of being woody, and the use of the term seems to imply that the coal is little better than the brown, woody lignite of North Dakota, whereas many of the coals of this class closely approach the lowest grade of bituminous coal. In fact, it is extremely... | |
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