Annual Report of Research and Technologic Work on Coal, Fiscal Year 1937

Gas Mask for Protection in Air Against All Gases, Vapors, and Smokes: Volume 22

Gases Produced in the Use of Carbon Tetrachloride and Foamite Fire Extinguishers in Mines

The Classification of North American Coals

Carbonizing Properties and Petrographic Composition of Washed and Unwashed Lower and Upper Kittanning-bed Coals from Mines 72 and 73, Johnstown, Cambria County, Pa

Influence of Washing Coal on Coke Properties and on Gas and By- Product Yields

Gases Commonly Used in the Industries and the Home and Their Hazards

Carbonizing Properties and Petrographic Composition of Millers Creek Bed Coal from Consolidation No. 155 Mine, Johnson County, Ky: And the Effect of Blending Millers Creek Coal with Pocahontas Bed and Pittsburgh Bed (Warden Mine) Coals

Automobile Exhaust Gases in Vehicular Tunnels

Developments in Coal Research and Technology in 1937 and 1938

Tests of the Heliopore Coal-carbonization Power-plant Process

Carbonizing Properties and Petrographic Composition of Pond Creek-bed Coal from Majestic Mine, Majestic, Pike County, Ky

Carbonizing Properties and Petrographic Composition of High Splint-bed Coal from Closplint Mine, Closplint, Harlan County, Ky

Coal-research Activities of the Bureau of Mines

Permeation of Oxygen Breathing Apparatus by Gases and Vapors

Notes on the Sampling and Analysis of Coal

Recent Developments in By-products from Bituminous Coal

Résumé of Research and Technologic Work Relating to Coal Conducted by the Technologic Branch During 1936

Annual Report of Research and Technologic Work on Coal, Fiscal Year 1938

Recent Developments in the Production of Motor Fuels from Coal