 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
 | 1947 - 364 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. Department of the Interior - 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... | |
 | United States. President - 1911 - 1346 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, tne treatment of ores and other mineral substances, the use of explosives and electricity, the prevention... | |
 | United States. Congress. House. Committee on Interstate and Foreign Commerce - 1912 - 44 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, three hundred... | |
 | 1913 - 942 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... | |
 | 1913 - 568 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. Department of the Interior - 1914 - 1082 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 end electricity, the prevention... | |
 | 1915 - 976 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. Bureau of Mines - 1915 - 128 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. Office of Education - 1918 - 1450 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... | |
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