Search U.S. government technical reports digitized or harvested by TRAIL.
Caesium, rubidium, and lithium
Automatic derailing switch at Roslyn no. 3 mine, Northwestern Improvement Company, Roslyn, Wash.
Comparative advantages of applying several geophysical methods of prospecting to the same territory
Mining methods and costs, American Zinc Co. of Tennessee, Mascot, Tenn.
Mining practice at Harmony Mines Co., Baker, Idaho
Natural-gasoline plants in the United States :January 1, 1930
Petroleum refineries in the United States, January 1, 1930
Deposits of titanium-bearing ores :by E.P. Youngman.
Privately owned mine rescue stations
Mining practices, methods, and costs at Mine No. 4 of the Marquette Range, Michigan
Gallium, germanium, indium, and scandium
Milling methods at the Hurley Plant of the Nevada Consolidated Copper Co., Hurley, N. Mex.
Mining practice at the Chino mines, Nevada Consolidated Copper Co., Santa Rita, N. Mex.
Mining, treatment methods, and costs, Menantico Sand & Gravel Co., Millville, N.J.
Mining methods at the Block P Mine of the St. Joseph Lead Co., Hughesville, Mont.
Mining methods at the Eighty-five mine.Calumet and Arizona Mining Co., Valedon, N. Mex.
Some notes on underground transportation in metal mines
Street paving in representative American cities :1925-29
List of permissible mine equipment
Milling methods at the Hughesville Concentrator of the St. Joseph Lead Co., Hughesville, Mont.
Mining laws of the Netherland East Indies
Milling methods and costs at the Concentrator of the Old Dominion Co., Globe, Ariz.
Mining laws of the Netherlands
Organization plan of the Holmes Safety Association
A new signaling device for shaft mines
Underground chute gates in metal mines
Lost-time accidents in some Alabama coal and iron mines during 1930
Mining methods and costs at the Central-Eureka Mine, Amador County, Calif.
Resistivity measurements upon artificial beds
Mining methods and costs of mining copper ore at the Verde Central Mines, Inc., Jerome, Ariz.
Mining methods and costs at the Porcupine United Gold Mines' Rochester Mine at Timmins, Ontario
The significance of solvent analysis as applied to coal
List of permissible self-contained oxygen breathing apparatus, gas masks, and hose masks
Milling methods and costs at the Montana mine concentrator of the Eagle-Picher Lead Co., Ruby, Ariz.