 ... the floor so as to catch the particles of coal as they are cut and to keep out impurities and excessive moisture where the floor is wet. Such a cloth should be about 1 J by 2 yards in size and spread so as to catch all the material composing the sample.  Bulletin of the United States Geological Survey - Seite 79von Geological Survey (U.S.) - 1909Vollansicht - Über dieses Buch
 | 1907 - 602 Seiten
...compliance with specifications issued by the fueltesting plant of the United States Geological Survey. A channel was cut perpendicularly across the face...size as to yield at least 5 pounds of coal per foot of thickness of coal bed. All material encountered in this cut was included in the sample, except partings... | |
 | Thomas Nelson Dale - 1908 - 458 Seiten
...some places it weathers light gray, standing out in strong contrast to the coal. CHEMK AL PROPKRTIRS. During the investigation here reported a number of...roof to floor, of such a size as to yield at least o pounds of coal per foot in thickness of coal bed. All material encountered in this cut was included... | |
 | Charles Willard Hayes, Geological Survey (U.S.) - 1908 - 168 Seiten
...about 1J by 2 yards in size and spread so as to catch all the material cut down. (c) Cut a channel perpendicularly across the face of the coal bed from roof to floor, with the exceptions noted in paragraph (d) and of such a size as to yield at least 5 pounds of coal... | |
 | 1909 - 504 Seiten
...by 2 yards in size and spread so as to catch all the material composing the sample. 3. Cut a channel perpendicularly across the face of the coal bed from roof to floor, with the exceptions noted in paragraph 4, and of such a size as to yield at least 5 pounds of coal... | |
 | Charles Willard Hayes - 1909 - 184 Seiten
...about IV by 2 yards in size and spread so as to catch all the material cut down. (c) Cut a channel perpendicularly across the face of the coal bed from roof to floor, with the exceptions noted in paragraph (</) and of such a size as to yield at least 5 pounds of coal... | |
 | 1911 - 74 Seiten
...cut from the bed and to keep out impurities and moisture where the floor was damp. A channel was then cut perpendicularly across the face of the coal bed from roof to floor and particular care taken to secure everything cut down excepting partings or binders more than %-inch... | |
 | 1911 - 82 Seiten
...cut from the bed and to keep out impurities and moisture where the floor was damp. A channel was then cut perpendicularly across the face of the coal bed from roof to floor and particular care taken to secure everything cut down excepting partings or binders more than %-inch... | |
 | Tennessee. Division of Geology - 1911 - 262 Seiten
...cut from the bed and to keep out impurities and moisture where the floor was damp. A channel was then cut perpendicularly across the face of the coal bed from roof to floor and particular care taken to secure everything cut down excepting partings or binders more than ^4-inch... | |
 | Tennessee. State Geological Survey - 1911 - 76 Seiten
...cut from the bed and to keep out impurities and moisture where the floor was damp. A channel was then cut perpendicularly across the face of the coal bed from roof to floor and particular care taken to secure everything cut down excepting partings or binders more than JHi-inch... | |
 | 1913 - 632 Seiten
...in size and should be so spread as to catch all the material composing the sample. 3. Cut a channel perpendicularly across the face of the coal bed from roof to floor, with the exceptions noted in paragraph 4, of such size as to yield at least 6 pounds of coal per foot... | |
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