 After the face of the coal was cleaned of any weathered coal or powder smoke a cut was made across the face of the coal from roof to floor, including all of the benches of coal mined and such impurities as were not removed in ordinary work. This cut was...  Bulletin of the United States Geological Survey - Page 89by Geological Survey (U.S.) - 1907Full view - About this book
 | Geology - 1905 - 830 pages
...thickness and quality, two points were selected in opposite or widely separated parts of the mine, and after the face of the coal was cleaned of any weathered...inch deep. The coal obtained from it. amounting to 2.1 or 30 pounds, was caught upon an oilcloth blanket spread upon the floor of the mine so as to protect... | |
 | Edward Wheeler Parker - Coal - 1905 - 690 pages
...thickness and quality, two points were selected in opposite or widely separated parts of the mine, and after the face of the coal was cleaned of any weathered...inch deep. The coal obtained from it, amounting to i!5 or 30 pounds, was caught upon an oilcloth blanket spread upon the floor of the mine so as to protect... | |
 | 1905 - 848 pages
...an undue amount of moisture in places where the floor was wet. A cut about 3 in. wide and 1 in. deep was made across the face of the coal from roof to floor, including thin and irregular shale, clay or sulphur partings, such as the miners fail to separate from the coal,... | |
 | Geological Survey (U.S.) - Geology - 1906 - 330 pages
...the chemical laboratory. Sample B was obtained in room 24, at the point where section B was measured. A cut was made across the face of the coal from roof to floor, including all parts of the bed usually mined, but excluding the partings noted in the section. This sample weighed... | |
 | Geological Survey (U.S.) - Geology - 1906 - 340 pages
...A was taken where section A was measured and sample B from the point where section B was measured. A cut was made across the face of the coal from roof to floor and the coal so obtained was crushed and quartered down until a quart sample of each was obtained.... | |
 | Harry Foster Bain - Lead mines and mining - 1906 - 778 pages
...of the rani was cleaned of weathered coal and powder smoke a cut was made across the face of the bed from roof to floor, including all of the benches of coal mined arid such impurities as were not removed in ordinary work. This cut was about 3 inches wide and 1 inch... | |
 | Lester Paige Breckenridge - Coal - 1907 - 406 pages
...following method was invariably observed : a After the face of the coal was cleaned of any we: tiered coal or powder smoke a cut was made across the face...inch deep. The coal obtained from it, amounting to 2o or 30 pounds, was caught upon an oilcloth blanket spread upon the floor of the mine, so as to protect... | |
 | Geology, Economic - 1907 - 602 pages
...of the coal was cleaned of weathered coal and powder smoke a cut was made across the face of the bed from roof to floor, including all of the benches of...inch deep; the coal obtained from it, amounting to 25 [to 100] pounds, was caught upon an oilcloth [or heavy canvas square] spread upon the floor of the... | |
 | Lester Paige Breckenridge, Paul Diserens - Coal - 1908 - 64 pages
...the coal at these places was cleaned in order to remove any weathered coal or powder smoke, and a cut made across the face of the coal from roof to floor, including all the benches mined and such impurities as were not removed in ordinary work. The coal obtained, amounting... | |
 | Alfred Geddes Maddren - Gold mines and mining - 1910 - 726 pages
...of the coal was cleaned of weathered coal and powder smoke a cut waa made across the face of the bed from roof to floor, including all of the benches of...inch deep; the coal obtained from it, amounting to 25 [to 100] o Preliminary report of the operations of the coal-testing plant of the US Geol. Survey at... | |
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