Search
Search U.S. government technical reports digitized or harvested by TRAIL.
Keyword Search
10066 results returnedSearch results
- Fatal accidents in Alabama coal mines during 1930
- Pyrites :general information
- Safety education at iron mines of the Lake Superior region
- Method and cost of quarrying, crushing and grinding limestone at the Catskill Plant of North American Cement Corporation, Catskill, N.Y.
- Mining laws of Ethiopia (Abyssinia)
- Mining practice and costs of the Vipond Mine, Timmins, Ontario
- Mining and crushing methods and costs at the Tiffin Limestone quarry of the Thurber Earthen Products Co., Fort Worth, Tex.
- Methods and costs of concentrating tungsten ores at Atolia, San Bernardino County, Calif.
- Mining laws of Austria
- Geophysical abstracts.
- Geophysical abstracts.
- Official changes in the active list of permissible explosives and blasting devices for August, 1930
- Rock-dusting a Pennsylvania coal mine
- Consumption of explosives in November, 1930 /W.W. Adams and L.S. Gerry.
- Flotation of low-grade phosphate ores.
- Smelting in the lead blast furnace :handling rich charges.
- Gases in manholes :a survey of a utility in Boston, Mass.
- Flotation reagents, 1929
- Consumption of explosives in February, 1931
- Consumption of explosives in March, 1931
- Comparison of storage-battery and cable-reel gathering locomotives in a West Virginia coal mine
- Official changes in the active list of permissible explosives and blasting devices for June, 1931
- Sand-and-gravel safety contest of 1930
- Official changes in the active list of permissible explosives and blasting devices for October, 1931
- 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
- Concentrating methods and costs at the Morenci Concentrator of the Phelps Dodge Corporation, Morenci, Greenlee County, Ariz.
- Milling methods and costs at the Concentrator of the Old Dominion Co., Globe, Ariz.
- Rubies and sapphires
- 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
- Method and cost of quarrying limestone and shale at the quarry of the Trinity Portland Cement Co., Dallas, Tex.
- Lost-time accidents in some Alabama coal and iron mines during 1930
- Mining methods and costs at the Central-Eureka Mine, Amador County, Calif.
- The paramount issue
- Resistivity measurements upon artificial beds
- Mining and crushing methods and costs at the West Penn Cement Co., limestone mine, West Winfield, Pa.
- Mining laws of Cuba
- 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
- Quartz and silica.
- Tunnel driving methods used at the Ojuela unit of the Compania Minera de Penoles, S.A., Ojuela, Durango, Mexico
