Coal: Its Properties, Analysis, Classification, Geology, Extraction, Uses and DistributionJohn Wiley & Sons, Incorporated, 1922 - 462 strani |
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acid amount analyses anthracite basin bituminous coal briquetting brown coal Bull calorific value cannel coal carbon dioxide Carboniferous cent Class of Coal classification clay coal beds coal deposits coal fields coal lands Coal Measures coal mined Coal Resources coal seams coke combustion composition constituents contains depth Devonian Eocene faulted feet in thickness feet thick Fixed carbon folded formation fossil fracture fuel ratio gases geological gram heat hydrogen igneous rocks inches Jurassic known Lepidodendron lignite Lower method miles mineral Miocene moisture nitrogen oven oxidation oxygen peat Pennsylvania percentage Permian pillars places plants produce province pyrite region River sample sandstone semianthracite semibituminous shaft shale short tons South specific gravity spores strata subbituminous coal sulphur Survey swamps temperature Tertiary tons Triassic U. S. Bur U. S. Geol Upper Cretaceous varies vegetal matter volatile matter
Priljubljeni odlomki
Stran 239 - ... of entry, under the preceding section, of the mines so opened and improved: Provided, That when any association of not less than four persons, severally qualified as above provided, shall have expended not less than five thousand dollars in working and improving any such mine or mines, such association may enter not exceeding six hundred and forty acres, including such mining improvements.
Stran 239 - Any person or association of persons severally qualified, as above provided, who have opened and improved, or shall hereafter open and improve, any coal mine or mines upon the public lands, and shall be in actual possession of the same...
Stran 238 - SEC. 2347. Every person above the age of twenty-one years, who is a citizen of the United States, or who has declared his intention to become such, or any association of persons severally qualified as above, shall, upon application to the register of the proper land office, have the right to enter, by legal subdivisions, any quantity of vacant coal lands of the United States not otherwise appropriated or reserved by competent authority...
Stran 241 - Act, or which, together with any other interest or interests as a member of an association or associations or as a stockholder of a corporation or corporations...
Stran 47 - Compute the analysis of the 60-mesh coal, which has become partly air-dried during sampling, to the drycoal basis, by dividing each result by 1 minus its content of moisture. Compute the analysis of the coal "as received" from the dry-coal analysis by multiplying by 1 minus the total moisture found in the 20-mesh sample.
Stran 59 - BaSO4 is soluble in acids and even in pure water, and the solubility limit is reached almost immediately on contact with the solvent. Hence, in the event of using reagents of very superior quality or of exercising more than ordinary precautions, there may be no apparent "blank," because the solubility limit of the solution for BaSO4 has not been reached or at any rate not exceeded.
Stran 241 - ... and no person or corporation shall take or hold any interest or interests as a member of an association or associations or as a stockholder of a corporation or corporations holding a lease under the provisions hereof, which, together with the area embraced in any direct holding of a lease under this act, or which, together with any other interest or interests as a member of an association or associations or...
Stran 240 - An Act to promote the mining of coal, phosphate, oil, oil shale, gas, and sodium on the public domain
Stran 4 - SPECIFIC GRAVITY. THE Specific Gravity of a body, is the ratio of its weight to the weight of an equal volume of some other body assumed as a standard.
Stran 58 - ... added to a solution of the reagents after these have been put through the prescribed series of operations. If this latter procedure is adopted and carried out, say, once a week or whenever a new supply of a reagent must be used, and for a series of solutions covering the range of...