 Interior, to make diligent investigation of the methods of mining, especially in relation to the safety of miners, and the appliances best adapted to prevent accidents, the possible improvement of conditions under which mining operations are carried on,...  Technological Mobilization: Hearings, Oct. 13, 21-22, 27, Nov. 17-18, 1942 - Página 176por United States. Congress. Senate. Committee on Military Affairs. Subcommittee on Technological Mobilization - 1942Visualização integral - Acerca deste livro
 | L. Bonnefoux - 1864 - 778 páginas
...especially in relation to the safety of miners, and the appliances best adapted to prevent accidenta, the possible improvement of conditions under which mining operations are carried on, the treatment of ores and other mineral substances, the use of explosives and electricity, the prevention... | |
 | United States - 1917 - 706 páginas
...mining, especially in relation to the safety of miners, the appliances best adapted to prevent accidents, the possible improvement of conditions under which...explosives and electricity, the prevention of accidents, and other inquiries and technologic investigations pertinent to the mining industry, and including... | |
 | United States. Department of the Treasury - 1911 - 498 páginas
...especially in relation to the safety of miners, and the appliances best adapted to prevent accidents, the possible improvement of conditions under which mining operations are carried on, the treatment of ores and other mineral substances, the use of explosives and electricity, the prevention... | |
 | 1918 - 892 páginas
...especially In relation to the safety of miners and the appliances best adapted to prevent accidents, the possible improvement of conditions under which mining operations are carried on, the treatment of ores and other mineral substances, the use of explosives and electricity, the prevention... | |
 | 1911 - 644 páginas
...mining, especially in relation to the safety of miners, the appliances best adapted to prevent accidents, the possible improvement of conditions under which...explosives and electricity, the prevention of accidents, and other inquiries and technologic investigations pertinent to the mining industry, $360,000 ; for... | |
 | United States. Congress. House. Committee on Mines and Mining - 1908 - 70 páginas
...Mr. DOUGLAS. It reads : " To make an investigation of the methods of mining, the safety of miners, the possible improvement of conditions under which...explosives and electricity, the prevention of accidents, the prices of products and markets for the same, the wages of employees, and of other matters pertinent... | |
 | 1910 - 300 páginas
...especially in relation to the safety of miners and the appliances best adapted to prevent accidents, the possible improvement of conditions under which mining operations are carried on, the treatment of ores and other mineral substances, the use of explosives and electricity, the prevention... | |
 | United States. Dept. of the Interior - 1910 - 130 páginas
...especially in relation to the safety of miners, and the appliances best adapted to preventing accidents, the possible improvement of conditions under which mining operations are carried on, the treatment of ores and other mineral substances, the use of explosives and electricity, the prevention... | |
 | United States - 1910 - 886 páginas
...especially in relation to the safety of miners, and the appliances best adapted to prevent accidents, the possible improvement of conditions under which mining operations are carried on, the treatment of ores and other mineral substances, the use of explosives and electricity, the prevention... | |
 | 1911 - 646 páginas
...especially In relation to the safety of miners, and the appliances best adapted to preventing accidents, the possible improvement of conditions under which mining operations are carried on, the treatment of ores and other mineral substances, the use of explosives and electricity, the prevention... | |
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