Determining the In-place Support of Mine Roof with Rock Bolts, White Pine Copper Mine, Michigan

Method of Determining the Strength of a Mine Roof

Borehole Deformation Gage for Determining the Stress in Mine Rock

Underground Gasification of Coal: Second Experiment in Preparing a Path Through a Coalbed by Hydraulic Fracturing, Issues 5807-5813

Probability Studies of the Incendivity of Permissible Explosives: Effect of Small Percentages of Sodium Chloride, Issues 5461-5480

Low-temperature Heat Capacities and Entropies at 298.15 K of Some Sodium- and Calcium-aluminum Silicates: Issues 5852-5859

Roof-span Studies in Limestone

Changes in Stress Concentration Created by Undercutting in Block Caving

Design of Underground Mine Openings: Oil-shale Mine, Rifle, Colo

Three-component Borehole Deformation Gage for Determining the Stress in Rock

Analyses of Ash from Coals of the United States

Deformation of a Borehole in Rock

Determination of Moisture-holding Capacity (bed Moisture) of Coal for Classification by Rank

Oil-Shale Mine, Rifle, Colo: A Review of Design Factors

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

Nitric Acid Oxidation Rates for Selected Coals and Related Substances

Copper Cementation Using Automobile Scrap in a Rotating Drum

Methods for Producing Alumina from Clay: An Evaluation of the Sulfurous Acid-caustic Purification Process, Issues 5981-6000

Splint Coals of the Appalachian Region: Their Occurrence, Petrography, and Comparison of Chemical and Physical Properties with Associated Bright Coals

Carbonizing Properties of Velva Lignite from Ward County, N. Dak., and Monarch Coal from Sheridan County, Wyo