 | Geology - 1906 - 1010 pages
...10-mesh sieve. The, ovens were always closed, both door and trunnel head, directly after being drawn, and allowed to gather heat, the length of time varying as necessity demanded. The average time was one hour and a half. The sample of coal was taken at regular intervals as the charge was emptied from bin... | |
 | Geological Survey (U.S.) - Geology - 1906 - 252 pages
...10-mesh sieve. The ovens were always closed, both door and trunnel head, directly after being drawn, and allowed to gather heat, the length of time varying as necessity demanded. The average time was one hour and a half. The sample of coal was taken at regular intervals as the charge was emptied from bin... | |
 | Samuel Stinson Gannett, David Henry Baldwin - Pennsylvania - 1906 - 992 pages
...10-inesh sieve. The. ovens were always closed, both door and trunnel head, directly after being drawn, and allowed to gather heat, the length of time varying as necessity demanded. The average time was one hour and a half. The sample of coal was taken at regular intervals as the charge was emptied from bin... | |
 | Geological Survey (U.S.) - Geology - 1908 - 86 pages
...8.53 per cent; on 60-mesh, 9.33 per cent; on 100-mesh, 9.13 per cent; through 100-mesh, 9.33 per cent. Both the door and the trunnel head of the oven were...demanded. The average time was one and one-half hours. The sample of coal was taken at regular intervals as the charge was emptied from bin to larry, by means... | |
 | Richard Lewis Humphrey, William Jordan - Building materials - 1908 - 816 pages
...per cent : on 60-mesh, 9.33 per cent; on 100-mesh, 9.13 per cent; through 100-mesh, 9.33 per cent. Both the door and the trunnel head of the oven were...demanded. The average time was one and one-half hours. The sample of coal was taken at regular intervals as the charge was emptied from bin to larry, by means... | |
 | Joseph Daniels - Coal - 1914 - 312 pages
...a Pennsylvania hammer crusher. The sampling of coal and the handling of the ovens were as follows : Both the door and the trunnel head of the oven were...demanded. The average time was one and one-half hours. The sample of coal was taken at regular intervals, as the charge was emptied from kiln to larry, by... | |
 | Geology - 1914 - 524 pages
...crusher. The sampling of coal and the handling of the ovens were as follows: Both the door and the trunncl head of the oven were always closed directly after...demanded. The average time was one and one-half hours. The sample of coal was taken at regular intervals, as the charge was emptied from kiln to larry, by... | |
 | United States - 1909 - 738 pages
...per cent; over 40-mesh, 22.86 per cent; over 60-mesh, 11.42 percent; through 60-mesh, 10 per centThe sampling of coal and coke and the handling of the...allowed to gather heat, the length of time varying ae necessity demanded. The average time was one and one-half hours. iMoldenke. Rlchanl. Belden, AW,and... | |
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Both the door and the trunnel head of the oven were always closed directly after the oven was drawn and it was allowed to gather heat, the length of time varying as necessity demanded. The average time was one and one-half hours. 