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... Official Congressional Directory - Page 288by United States. Congress - 1914Full view
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Mineral industries - 1908
...of the United States; to make diligent investigation of the methods of mining, the safety of miners, the possible improvement of conditions under which...operations are carried on, the treatment of ores, the use of explosives and electricity, the prevention of accidents, the values of mineral products...