Copper Recovery from Conglomerate-type Native Copper Ore by Ammonia Leaching, Solvent Extraction, and Electrowinning

Extraction of Gold from Carbonaceous Ores: Pilot Plant Studies

Response Variations of a Microphone Worn on the Human Body

Copper Cementation Using Automobile Scrap in a Rotating Drum

Report of Investigations: no.7381 to date

Processing Gold Ores Using Heap Leach-carbon Adsorption Methods

Recovery of Mercury from Cinnabar Ores by Electrooxidation: Extraction Plant Amenability Tests, Issues 8081-8100

Detonation of a Flammable Cloud Following a Propane Pipeline Break: The December 9, 1970, Explosion in Port Hudson, Mo, Issues 7741-7760

Investigation of Fire and Explosion Accidents in the Chemical, Mining, and Fuel-related Industries: A Manual, Issues 678-688

Test Operation of a Pneumatic Vibrating-blade Planer in Phosphate and Coal: A Progress Report on Planer-mining Research, 1958-60, Issues 6121-6140

Direct Method Determination of the Gas Content of Coal: Procedures and Results, Issues 8501-8520

Benefication of Western Mesabi Range Oxidized Taconites: A Comparison of the Anionic and Cationic Flotation Systems and an Evaluation of Potential Iron Ore Reserves, Issues 8541-8560

Calibration of a Rotating Piston Deadweight Gage by Means of a Mercury Column Less that 1 Meter High: Significance of Piston Constants and Their Applications, Issues 6821-6840

Reconnaissance of Tellurium Resources in Arizona, Colorado, New Mexico and Utah: Including Selected Data from Other Western States and Mexico, Issues 6341-6360

In Situ Tests of Bearing Capacity of Roof and Floor in Selected Bituminous Coal Mines: A Program Report - Longwall Mining, Issues 7401-7420