BulletinU.S. Government Printing Office, 1913 - Mines and mineral resources |
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Common terms and phrases
14 miles 43-inch cut 5-foot cut bed see U. S. bed was measured Bony coal British Bul bulletin Bureau of Mines Calo Calorific value Carboniferous Carboniferous age chemical analyses chemical analyses-Continued coal bed coal sampled composite COUNTY COUNTY-continued Creek Cretaceous age cross entry drift mouth east entry feet from drift feet from mouth feet north feet northeast feet south feet west field floor geologic relations inch cut included in sample Kittanning Kushtaka Laboratory left entry letin this units lignite main entry measured and sampled miles east miles north miles south miles southwest miles west Mines Bull Nitro north entry northwest phur Pocahontas right entry Roof Sample.-Bituminous coal sandstone Section A sample Section of coal shale slope southeast specific tests Sulphur Survey Bull Table of chemical thermal letin Thickness of bed Thickness of coal tile ture U. S. Geol Vola west entry
Popular passages
Page 345 - Analyses of coals In the United States, with descriptions of mine and field samples collected between July 1, 1904, and June 30, 1910, by NW Lord, with chapters by JA Holmes, FM Stanton, AC Fieldner, and Samuel Sanford.
Page 351 - A gross sample weighing at least 6 pounds for each foot of the thickness of the bed is then obtained by making a perpendicular cut 2 inches deep and 6 inches wide (or 3 inches deep and 4 inches wide in the softer coals) from the roof to the floor down the middle of the foot-wide cut previously made in the coal face. The...
Page 1189 - BULLETIN 28. Experimental work conducted in the chemical laboratory of the United States fuel-testing plant at St. Louis, Mo., January 1, 1905, to July 31, 1906, by NW Lord.
Page 17 - PbCrO4 at a dull-red heat. The transfer of the boat from weighing tube to combustion tube should be made as rapidly as possible. As soon as the boat is in place near the asbestos plug at the beginning of the copper oxide the...
Page 1186 - REPORT OF PROGRESS IN 1877. The Geology of LAWRENCE COUNTY, to which is appended a Special Report on the CORRELATION OF THE COAL MEASURES in Western Pennsylvania and Eastern Ohio. 8 vo., pp. 336, with a colored Geological Map of the county, and 134 vertical sections. By IC White.
Page 17 - The heat should be slowly increased by turning on more burners under the open part of the tube until the sample is ignited; then the temperature can be increased rapidly, but care should be taken not to melt the combustion tube.
Page 30 - ... coal. — When coal contains much inorganic matter, especially iron pyrites, the usual method of calculating its composition from the data obtained in the process of organic analysis may be erroneous in a sensible degree. The ashes left by incineration are estimated as inorganic matter, and the proportion of oxygen is found by subtracting the sum of the carbon, hydrogen, nitrogen, and ashes from the amount of dry coal subjected to analysis. By incineration the iron of the pyrites is converted...
Page 8 - It involves selecting a representative face of the bed to be sampled; cleaning the face; making a cut across it from roof to floor, and rejecting or including impurities in this cut according to a definite plan as...
Page 1183 - Stages of the Des Moines or chief coal-bearing series of Kansas and southwest Missouri and their equivalents in Iowa.
Page 1048 - ... recently discontinued at this point. It is probable, however, that the company will open mines on the upper bed if the quality of the coal warrants it, although the coal is somewhat thinner than the Pocahontas bed. Two sections of coal shown in fig. 9 were measured in this experimental mine. Section A was measured at a point midway between the entrance and the face of the drift, and section B at the face of the drift. The sections are as follows: Sections of Coal Bed in the Experimental Mine...