Gold Distribution in Diamond-drill Core from the Homestake Mine, Lead, S. Dak

Linear Discriminant Analysis of Multivariate Assay and Other Mineral Data

Using Sulfur Hexafluoride as a Gaseous Tracer to Study Ventilation Systems in Mines

Oxygenates in Automotive Exhaust Gas: Estimation of Levels of Carbonyls and Noncarbonyls in Exhaust from Gasoline Fuels, Issues 7661-7680

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

Flotation of Beryl from North-eastern Pegmatites: A Progress Report, Issues 5761-5780

Test Operation of a Pneumatic Vibrating-blade Planer: A Progress Report on Phosphate Mining Research, Issues 6861-6880

Three Coal Mine Ventilation Studies Using Sulfur Hexafluoride Tracer Gas

Tracer Gas as an Aid in Mine Ventilation Analysis

Methane Accumulations in Coal Mine Roof Cavities

Waste Lubricating Oil Research: Some Innovative Approaches to Reclaiming Used Crankcase Oil, Issues 7921-7930; Issues 7932-7939

Report of Investigations: no.7381 to date

Fersmite: A Rare Calcium-columbate Mineral from Montana, Issues 5681-5700

Multiple Zone Mining Plus Beneficiation of Western Phosphate Rock: A Cost Estimate and Comparison with Selective Mining, Issues 7501-7520

Determining Phosphorous in Coal and Coke: Evaluation of Volumetric, Colormetric, and Gravimetric Methods, Issues 5741-5760

Low-temperature Heat Capacities and Entropies at 298.15° of Sulfides of Arsenic, Germanium and Nickel: 1963

Laboratory Experiments in Electrokinetic Densification of Mill Tailings: (in Two Parts) 2. Application to Various Types and Classifications of Tailings, Issues 7881-7900

Rapid Method for Determining Lime, Magnesia, and Titania in Blast-furnace Slags and Other Calcareous Materials: 1959

Low-temperature Phase Equilibria of Helium-bearing Natural Gases: Exell Gas, Issues 6001-6020

Monitoring Ground Movements Near Caving Stopes: Methods and Measurements, Issues 8581-8600