 | Illinois State Geological Survey - Geology - 1909
...MINING-WASTE. GENERAL. The influencing conditions causing the great losses that are at present incurred are : 1. Cheapness of "coal in place ;" that is, in the...and floor as determining the method of mining. 4. Surface-subsidence due to mining. 5. Interlaced boundary ownerships. 6. Carelessness in mining operations.... | |
 | Mineral industries - 1908 - 1244 pages
...causing the great losses that are at present incurred are : * Consulting Engineer, Chicago. [29] ■ one? 1. Cheapness of " coal in place ;" that is, in the seam 2. Low market-prices, resulting from extreme competition. 3. Character of the seam, roof, and floor as determining... | |
 | Illinois State Geological Survey - Geology - 1909 - 420 pages
...MINING-WASTE. GENERAL. The influencing conditions causing the great losses that are at present incurred are: 1. Cheapness of "coal in place ;" that is, in the...and floor as determining the method of mining. 4. Surface-subsidence due to mining. 5. Interlaced boundary ownerships. 6. Carelessness in mining operations.... | |
 | Illinois State Geological Survey (1905- ) - Geology - 1909 - 424 pages
...MINING-WASTE. GENERAL. The influencing conditions causing the great losses that are at present incurred are: 1. Cheapness of "coa'l in place;" that is, in the...and floor as determining the method of mining. 4. Surface-subsidence due to mining. 5. Interlaced boundary ownerships. 6. Carelessness in mining operations.... | |
 | Illinois State Geological Survey - Geology - 1909 - 506 pages
...MINING-WASTE. GENERAL. The influencing conditions causing the great losses that are at present incurred are : 1. Cheapness of "coal in place;" that is, in the seam....and floor as determining the method of mining. 4. Surface-subsidence due to mining. 5. Interlaced boundary ownerships. 6. Carelessness in mining operations.... | |
 | Engineering - 1917 - 540 pages
...as follows : "The influencing conditions causing the great losses that are at present incurred are: 1. Cheapness of 'coal in place'; that is, in the seam....due to mining. 5. Interlaced boundary ownerships. •Scholz. Carl, "The Economics of the Coal Industry," Proc. Amer. Min. Cong., p. 241, 6. Carelessness... | |
 | Mineral industries - 1908 - 698 pages
...i' *•'• «' •'! »'}•«•«•• I ."• I •*< *1 • J • 4 I ' I «•••! • , 1. Cheapness of " coal in place ;" that is, in the...and floor as determining the method of mining. 4. Surface-subsidence due to mining. 5. Interlaced boundary ownerships. 6. Carelessness in mining operations.... | |
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GENERAL. The influencing conditions causing the great losses that are at present incurred are : 1. Cheapness of "coal in place ;" that is, in the seam. 2. Low market prices, resulting from extreme competition. 3. Character of the seam, roof, and floor... 