 a special mineralization producing a bituminous matter instead of coal or lignite. This operation is not attributable to heat, nor of the nature of a distillation, but is due to chemical reactions at the ordinary temperature, and under the normal conditions...  Report of the Secretary of Agriculture ... - Page 446by United States. Department of Agriculture - 1862Full view - About this book
 | 1863 - 962 pages
...in the production of bitumen, instead of coal or lignite." This conversion, ac* cording to him, " is not attributable to heat, nor of the nature of a distillation, but is due to chemical reactions at the ordinary temperature, and under the normal conditions of climate."... | |
 | 1863 - 494 pages
...resulted in the production of bitumen, instead of coal or lignite." This conversion, according to him, "is not attributable to heat, nor of the nature of a distillation, but is due to chemical reactions at the ordinary temperature, and under the normal conditions of climate."... | |
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