Editors’ Note.- A Review of Rock Mechanics Studies in the United States Pertinent to Earthquake Prediction.- Volume Changes During Fracture and Frictional Sliding: A Review.- Friction of Rocks.- A Note on Permeability Changes in Geologic Material Due to Stress.- The Effect of Water on Stress Relaxation of Faulted and Unfaulted Sandstone.- Mineralogy and Physical Nature of Clay Goug.- Rock Friction-Effect of Confing Pressure, Temperature, and Pore Pressure.- Aspects of Asperity-Surface Interaction and Surface Damage of Rocks during Experimental Frictional Sliding.- Electrical Resistivity Changes in Rocks During Frictional Sliding and Fracture.- Seismic Velocity Changes during Fracture and Frictional Sliding.- Dilatancy and Fracture Induced Velocity Changes in Rock and their Relation to Frictional Sliding.- Velocity Anomalies: An Alternative Explanation Based on Data from Laboratory Experiments.- Creep, Stable Sliding, and Premonitory Slip.- Time-Dependent Friction and the Mechanics of Stick-Slip.- Transient Creep and Semibrittle Behavior of Crystalline Rocks.- Effect of Displacement Rate on the Real Area of Contact and Temperatures Generated During Frictional Sliding of Tennessee Sandstone.- Fracture Surface Energy of Olivine.- Fault and System Stiffnesses and Stick-Slip Phenomena.- Experimental Observations of Elastic Wave Radiation Characteristics from Tensile Cracks and Pre-existing Shear Faults.- Model Studies of Shear Displacement along a Pre-existing Fault.- Small Faults Formed as Deformation Bands in Sandstone.- Development of Faults as Zones of Deformation Bands and as Slip Surfaces in Sandstone.- Propagation of Slip along Frictional Surfaces.- Rupture and Particle Velocity During Frictional Sliding.- Nonuniform Friction as a Physical Basis for Earthquake Mechanics.- Comments to “Nonuniform Friction as a Physical Basis for Earthquake Mechanics” by A. Nur.