Technical paper issued by the Bureau of Mines over studies conducted on electrical resistivity at the Abana Mine in Quebec. The methods used, and results of the studies are discussed. This paper includes tables, maps, and illustrations.

Report issued by the Bureau of Mines discussing the mechanical equipment used in oil and gas wells of the Oklahoma City field. As stated in the introduction, "this paper presents the results of a study devoted chiefly to new equipment that has been developed to meet the requirements of drilling and producing operations in the Oklahoma City field and that has been accepted by drilling contractors and operators" (p. 1). This report includes tables, illustrations, and photographs.

Technical paper issued by the Bureau of Mines over the ventilation of copper mines in Michigan. Natural ventilation of the mines and mining conditions are discussed. This report includes tables, maps, and illustrations.

Technical paper issued by the Bureau of Mines over transportation of motor gasoline by pipe line. The locations and designs of the pipe lines are discussed. This paper includes tables, maps, photographs, and illustrations.

Technical paper issued by the Bureau of Mines over "the history of the craters in the Richland gas field. The data have been collected at various times over a period of four years. The equipment and methods of control are discussed, and photographs show the surface conditions at various intervals in the life of the craters" (p. 1). This paper includes tables, maps, photographs, and illustrations.

Technical paper issued by the Bureau of Mines over an engineering study of the Cotton Valley oil field. The history, geology, development, and production of the field are discussed. This paper includes tables, maps, photographs, and illustrations.

Report issued by the Bureau of Mines discussing the ball-mill grinding technique. Different methods of mill grinding are presented and compared with ball-mill grinding. This report includes tables, illustrations, and photographs.

Report issued by the Bureau of Mines discussing analyses of Texas crude oils. As stated in the introduction, "this paper makes available in condensed tabular form under one cover all analyses of Texas crude oils made by the Bureau of Mines to March 1939" (p. 1). This report includes tables, and a map.

Report issued by the Bureau of Mines discussing studies conducted on the wax byproducts of crude petroleum. As stated in the scope of report, "this report discusses the principal methods given in the literature for the quantitative determination of wax in petroleum and its fractions by the use of selective solvents" (p. 3). This report includes tables, and illustrations.

Report issued by the Bureau of Mines discussing the occurrence of tuberculosis and silicosis among mine workers of the Tri-State district including Oklahoma, Kansas, and Missouri. Past history of the diseases are presented, as well as the standard means of examination of miners. This report includes a map, tables, illustrations, and photographs.