 | James Dwight Dana - 1887 - 542 Seiten
...1-56 2 59 i:is 2-27 385 1-86 7-20 Peat, light brown (imperfect) 1-11 Peat, black those of the heds of good coal, since, in the case of the peat, the...explanation of the origin of the latter, given on page 346, suffices to illustrate also the origin of the former. With a less complete exclusion of the air,... | |
 | James Dwight Dana - 1894 - 540 Seiten
...coal, since, in the case of the peat, the air has access, while in that of the coal the air was moie or less excluded by overlying strata; and the more...explanation of the origin of the latter, given on page 346, suffices to illustrate also the origin of the former. With a less complete exclusion of the air,... | |
 | United States. Philippine Commission (1900-1916) - 1901 - 608 Seiten
...conditions of change are somewhat different from those of the beds of good coal, since in the case of peat the air has access, while in that of the coal...exclusion, other things equal, the better the coal." (Le Conte.) The other important elements that enter into the construction of coal and determine its... | |
 | 1901 - 300 Seiten
...conditions of change are somewhat different from those of the beds of good coal, since in the case of peat the air has access, while in that of the coal...exclusion, other things equal, the better the coal." (Le Conte.) The other important elements that enter into the construction of coal and determine its... | |
 | United States. War Department - 1909 - 634 Seiten
...conditions of change are somewhat different from those of the beds of good coal, since in the case of peat the air has access, while in that of the coal...exclusion, other things equal, the better the coal." (Le Conte.) The other important elements that enter into the construction of coal and determine its... | |
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Peat is vegetation which has undergone, in part, the change to coal, and, in some cases, it has become brown coal. The conditions of change are somewhat different from those of the beds of good coal, since in the case of peat the air has access, while... 