Report issued by the U.S. Bureau of Mines detailing the laboratory-scale tests of the efficiency of the Trent process in cleaning coal, in which powdered coal, water, and oil is agitated or beaten together to remove impurities. The report includes details in tables detailing the efficiency varying the type and amounts of coal, oil, and water on the process.

Report discussing "the extent and nature of the hazards to firefighters from gases and smoke resulting from the application of carbon tetrachloride extinguisher to electric arcs, burning insulation or fires such as may occur in electrical apparatus and machinery. The experiments described were made for the purpose of determining the nature of gases and smoke and ascertaining their toxic properties" (p. 1).

Report issued by the Bureau of Mines over an annual study of synthetic liquid fuel production. Results of the annual study are presented and discussed. This report includes maps, tables, illustrations, and photographs.

Report issued by the Bureau of Mines on the motor-fuels sold during the winter of 1947-1948. Characteristics of the fuel samples obtained are listed. This report includes tables, graphs, and a map.

Report issued by the Bureau of Mines over studies of zinc-lead reserves in the tri-state area. The results of the studies are presented. This report includes tables, maps, and illustrations.

Report issued by the Bureau of Mines over surveys conducted on the motor fuels sold during the winter of 1948-1949. The properties of the fuels sampled are presented. This report includes tables, graphs, and maps.

Report issued by the Bureau of Mines over investigations of coking coal reserves of Sequatchie County, Tennessee. Testing to determine suitability for producing metallurgical coke is also presented. This report includes tables, graphs, maps, illustrations, and photographs.

Report issued by the Bureau of Mines over experiments conducted on fuel-gas mixtures. The results of these experiments are presented. This report includes tables, graphs, illustrations, and photographs.

Report issued by the U.S. Bureau of Mines on the motor fuels sold during the winter of 1952-53. The characteristics of the fuels sold, and the regions they were sold in are listed. This report includes tables, and maps.

Report issued by the Bureau of Mines on the anthracite coal in the Bottom Red Ash Bed in Pennsylvania. The coal samples were analyzed for thickness and geologic structure. The amount of recoverable coal was also estimated. This report includes tables, maps, and illustrations.

Report issued by the Bureau of Mines on the geochemical anomalies found in the gold-antimony deposits near Stibnite, Idaho. Many samples were collected and tested through an atomic absorption method. This report includes a map.

Report issued by the U.S. Bureau of Mines on studies of the known natural gas reserves in central Michigan sandstone deposits. The geology and methods used to estimate the reserves are presented. This report includes tables, illustrations, and maps.

Report issued by the U.S. Bureau of Mines on the oil and gas production of the Eunice oil field in southeastern New Mexico. Properties of the oil field, and analysis of the oil and gas produced are presented. This report includes tables, maps, illustrations, and photographs.

Report issued by the U.S. Bureau of Mines regarding laboratory tests conducted on acid leaching of manganese ore. Descriptions of the methods used in testing and results are presented. This report contains tables, and graphs.

Report issued by the U.S. Bureau of Mines on experiments conducted to improve the cab conditions of freight engines. The temperature, gas content, and other properties are presented. This report includes tables, graphs, and illustrations.

Report issued by the U.S. Bureau of Mines on the leaching of copper ores. The different strengths and cycles of solvents to extract impurities from the ore are presented. This report includes tables and graphs.

Report issued by the U.S. Bureau of Mines on the coal mine related deaths that occurred during the month of June, 1931. The number of fatalities and the causes of each are presented. This report includes tables and a graph.

Report issued by the U.S. Bureau of Mines on testing of sub-audible noises and accuracy of rock burst predictions. The history of this study, and the results of these investigations are presented. This report includes tables, graphs, illustrations, and diagrams.

Report issued by the U.S. Bureau of Mines on the investigations conducted on the mica deposits found in Latah County, Idaho. Characteristics and properties of the mica deposits are listed. This report includes tables, and maps.

Report issued by the U.S. Bureau of Mines on the motor fuels sold during the winter of 1945-46. The characteristics of the fuels sold, and the regions they were sold in are listed. This report includes tables, and maps.

Report issued by the U.S. Bureau of Mines on the possibilities of applying oxygenated air during metallurgical and allied processes. The methods and results of applying oxygenated air to these processes are presented. This report includes tables and graphs.

Report issued by the U.S. Bureau of Mines on the drilling for copper deposits near Pinal County, Arizona in 1949. Topographic and geologic mapping, drilling, and field tests were studied. Tables, maps, and illustrations are presented.

Report issued by the U.S. Bureau of Mines on the development of a mobile compressor and utility station in the oil-shale mine near Rifle, Colorado during 1949. The report includes photographs and illustrations of the mobile station.

Report issued by the U.S. Bureau of Mines conducted a study on the injection of gas into the McClosky limestone in northern Illinois and Indiana. The resulting increases in oil and gas production from this area are presented. The report includes maps, graphs, tables, and illustrations.