Search U.S. government technical reports digitized or harvested by TRAIL.
Generation and propagation of strain waves in rock :part I
Methods of excavation and roof support used in some recently constructed tunnels
Summary of published information on large-capacity compressed-air receivers for underground mines
Crude-oil and refined products pipe-line mileage in the United States :January 1, 1950
Petroleum refineries, including cracking plants, in the United States, January 1, 1950
Lead smelting in the ore hearth
Investigation of the Sunrise copper-gold mine, Granite County, Mont.
Investigation of Smuggler lead-zinc mine, Aspen, Pitkin County, Colo.
Tests on the control of coal-mine fires in the experimental coal mine
Investigation of Guadalupe mercury mine, Santa Clara County, Calif.
Investigation of fluorite deposits of Babb Vein System, Crittenden and Livingston counties, Ky.
Limits of flammability and ignition temperatures of phthalic anhydride
Investigation of Taylor Creek lead-zinc deposit, Kupreanof Island, Petersburg, Alaska
Investigation of the Tapley copper deposit, Hancock County, Maine
Secondary recovery of oil by air and gas injection in the Brenneman Field, Hancock County, W. Va.
Investigation of Eagle Silver lead-zinc mine, Tooele County, Utah
Investigation of the Great Eastern nickel deposit, Clark County, Nev.
Recent rock-dusting experiments for arresting coal-mine explosions
Investigation of Nevada Scheelite, Inc., deposit, Mineral County, Nev.
Flotation of a North Carolina pyrophyllite ore
Investigation of North Empire zinc-lead deposit, Cherokee County, Kans.
Flotation and cyanidation tests on a gold-copper sulfide ore from Cooke, Mont.
Investigation of the Cove Meadow copper deposit, Humboldt County, Nev.
Investigation of the New Almaden mercury mine, Santa Clara County, Calif.
Analyses of crude oils from some fields of southeastern United States,
Truck haulage at the National Lead Co. open-cut ilmenite-magnetite mine, Tahawus, N. Y.
Investigation of the Oronogo-Webb City-Duenweg zinc-lead district, Jasper County, Mo.
Investigation of the Vicksburg lead-zinc mine, Beaver County, Utah
Effect of temperature on flame-arresting properties of flat joints in explosion-proof mine equipment
A study of stray currents in Pennsylvania anthracite mines
The use of dust respirators in coal mines
Fundamentals of smoke abatement
Mining methods and costs at the Highland Surprise Mine, Shoshone County, Idaho
Report of the Health and Safety Division :fiscal year 1949
Electrical blasting at Miami Copper Co., Miami, Ariz.
Permissible mine equipment approved during the calendar years 1947-49
Hydraulic tunneling in St. Peter sandstone at Minneapolis, Minn.
Roof bolting in the United States
Coal-mine explosions and coal- and metal-mine fires in the United States in 1949
Carbide insert bit drilling at the Cleveland-Cliffs Iron Co. mines, Ishpeming, Mich.
List of respiratory protective devices approved by the Bureau of Mines
Achievements in mine safety research and problems yet to be solved