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Place of occurrence of fatalities resulting from falls of roof or coal
Injuries by occupation...
Frequency and severity rates of accidents
Method of developing mines A to L
Testing mine roof
Mine posts and accident frequency
Details of conditions and practices in mines A to L
Cutting and blasting
Character of falls
1 The Bureau of Mines will welcome reprinting of this paper, provided the following footnote acknowledgment is used;
"Reprinted from U. S. Bureau of Mines Report of Investigations 3113."
2 Senior mining engineer, U. S. Bureau of Mines, Pittsburgh Experiment Station, Pittsburgh, Pa.
3 Mining engineer, U. S. Bureau of Mines, Intermountain Experiment Station, Salt Lake City, Utah.
Associate mining engineer, U. S. Bureau of Mines, Pittsburgh Experiment Station, Pittsburgh, Pa.; now Pennsylvania
Coal Mine Inspector, 30th District.