Report of Investigations: no.7381 to date

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

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

Stresses Induced Around Mine Development Workings by Undercutting and Caving, Climax Molybdenum Mining, Colorado (in Two Parts).: Strain and deformation measurement. 2

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

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