 | United States. Congress. House. Committee on Appropriations - 1936 - 1226 pages
...mining, especially in relation to the safety of miners, the appliances best adapted to prevent accidents, the possible improvement of conditions under which mining operations are carried on, the use of explosives and electricity, the prevention of accidents, statistical studies and reports relating... | |
 | United States. Congress. House. Committee on Appropriations - 1936 - 1682 pages
...mining, especially in relation to the safety of miners, the appliances best adapted to prevent accidents, the possible improvement of conditions under which mining operations are carried on, the use of explosives and electricity, the prevention of accidents, statistical studies and reports relating... | |
 | United States. Congress. Senate. Committee on Finance - United States - 1939 - 1104 pages
...mining, especially in relation to the safety of miners, the appliances best adapted to prevent accidents, the possible improvement of conditions under which mining operations are carried on, the use of explosives and electricity, the prevention of accidents, statistical studies and reports relating... | |
 | United States. Congress. House. Committee on Appropriations - 1938 - 1658 pages
...mining, especially in relation to the safety of miners, the appliances best adapted to prevent accidents, the possible improvement of conditions under which mining operations are carried on, the use of explosives and electricity, the prevention of accidents, statistical studies and reports relating... | |
 | United States. Congress. House. Committee on Appropriations - 1938 - 1656 pages
...mining, especially in relation to the safety of miners, the appliances best adapted to prevent accidents, the possible improvement of conditions under which mining operations are carried on, the use of explosives and electricity, the prevention of accidents, statistical studies and reports relating... | |
 | United States. Congress. House. Appropriations - 1938 - 1694 pages
...mining, especially in relation to the safety of miners, the appliances best adapted to prevent accidents, the possible improvement of conditions under which mining operations are carried on, the use of explosives and electricity, the prevention of accidents, statistical studies and reports relating... | |
 | United States. Congress. House. Committee on Appropriations - 1939 - 2006 pages
...mining, especially in relation to the safety of miners, the appliances best adapted to prevent accidents, the possible improvement of conditions under which mining operations are carried on, the use of explosives and electricity, the prevention of accidents, statistical studies and reports relating... | |
 | United States. Bureau of Mines - Mines and mineral resources - 1945 - 1644 pages
...especially relation to the safety of miners, and the appliances test adapted to prevent accidents, the pass improvement of conditions under which mining operations are carried on, the treatment ores and other mineral substances, the use of explosives and electricity, the prevention of a dents,... | |
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That it shall be the province and duty of said bureau and its director, under the direction of the Secretary of the Interior, to make diligent investigation of the methods of mining, especially in relation to the safety of miners and the appliances best... 
