Report issued by the Bureau of Mines discussing hydraulic-powered roof support specifications. As stated in the abstract, "this report presents observations made by Bureau engineers regarding hydraulic-powered roof supports that are currently being used or have been used on nearly all operating long-walls in the United States" (p. 1). This report includes tables, and illustrations.

Report issued by the Bureau of Mines discussing a program for microfilming maps of abandoned mines in the Pennsylvania anthracite region. As stated in the introduction, "this report contains a catalog of films covering 68 of the 72 mines in the Wyoming Basin of the Northern anthracite field. Maps of active mines are not included" (p. 4). This report includes tables, and maps.

Report issued by the Bureau of Mines discussing the thickness of coal seams mined in the United States between 1945 and 1965. Locations, and production of coal seams are presented. This report includes tables.

Report issued by the Bureau of Mines discussing the Ringelmann smoke chart. This report serves as a revision to a previous report covering the Ringelmann chart. As stated in the abstract, "since instructions on its use are not shown on the recent edition of the chart, those included in this revision of the previous Bureau of Mines publication now are necessary complement to the chart. More detail regarding the use of the chart is included than was given in the earlier version" (p. 1). This report includes tables, and illustrations.

Report issued by the Bureau of Mines discussing studies conducted on the coal resources of the Flat-Rock area of Jackson County, Alabama. As stated in the introduction, "an investigation was planned to determine the extent, quality, and economic minability of coal deposits in Alabama reasonably close to ample fresh water sources that might be available for possible thermal electric power-plants" (p. 1). This report includes tables, maps, illustrations, and photographs.

Report issued by the Bureau of Mines discussing the minerals produced in the Missouri River Basin of Montana. The mineral resources of the area are investigated, analyzed, and presented. This report includes tables, maps, and illustrations.

Report issued by the Bureau of Mines discussing the mining practices at Gas Hills, Wyoming. As stated in the abstract, "this report, based on information made available by four uranium-producing companies, describes the geology, exploration, open-pit development and mining, and shaft sinking in the Gas Hills uranium district of Wyoming" (p. 1). This report includes tables, maps, illustrations, and photographs.

Report issued by the Bureau of Mines discussing waterflooding techniques used in Osage County, Oklahoma. As stated in the introduction, "information on each individual project covered in this report includes the early history, methods used to complete wells, source and treatment of water, description of automatic custody-transfer systems, oil production-decline curves, mineral analysis of waters, typical electric logs and core analyses, development maps, and the results of waterflooding" (p. 2). This report includes tables, maps, and illustrations.

Report issued by the U.S. Bureau of Mines discussing the mining costs and methods of the Regal asbestos mine in Arizona. Location, history, production, and development details are presented. This report includes tables, maps, illustrations, and photographs.

Report issued by the Bureau of Mines discussing the use of fire-resistant hydraulic fluids in coal mines. As stated in the summary, "this report reviews investigations to determine the fire hazard in coal mining when using flammable petroleum hydraulic oils to actuate mining equipment and summarizes research by the Bureau of Mines and industry on fire-resistant hydraulic fluids" (p. 1). This report includes tables, illustrations, and photographs.

Report issued by the Bureau of Mines discussing the Soviet plan to increase oil production between 1959 and 1965. As stated in the introduction, "this report, based almost entirely on Soviet petroleum literature, describes the planned expansion of the U.S.S.R. petroleum industry and attempts to provide some idea of the magnitude of future Soviet oil exports" (p. 2). This report includes tables, and a map.

Report issued by the U.S. Bureau of Mines discussing the use of small digital computers for problem solving during pyrometallurgical research. As stated in the field of research, "the scope of research varies from the development of new processes to the evaluation of raw materials for existing processes. The types of calculations required range all the way from those involving attempts to determine complex mathematical relationships between physical quantities to those concerned with simple summaries and analyses of daily furnace production" (p. 2-3). This report includes tables, illustrations, and a photograph.

Report issued by the U.S. Bureau of Mines discussing mining practices conducted in the tri-state district of Kansas, Missouri, and Oklahoma. As stated in the introduction, "the catalog preserves the records of accomplished explorations and mine developments in the district and provides a readily available source of information for individuals and firms interested in planning mineral explorations, Government agencies estimating of reserves of mineral resources, and the mining industry for general use" (p. 1). This report includes tables, maps, and illustrations

Report issued by the U.S. Bureau of Mines discussing mining costs and methods of fluorspar mines in Hardin County, Illinois. As stated in the summary, "it describes the exploration, development, and mining practices, giving costs of each. Transportation, equipment, power, labor, and other influencing factors also are discussed" (p. 1). This report includes tables, maps, illustrations, and photographs.

Report issued by the U.S. Bureau of Mines discussing mining costs and methods of the Black Rock Tungsten Mine in Mono County, California. As stated in the summary, "this report is one of a series prepared by the Bureau of Mines on exploration, development, mining methods, and costs at various mines in the United States" (p. 1). This report includes maps, illustrations, and photographs.