Report including seven miners' circulars on accident prevention in metal and nonmetallic mines. The explain the cause of mine fires and methods used to prevent and control them, the occurrence of gases in mines, and the importance of standards in ventilation.

Report issued by the Bureau of Mines over studies conducted on low-temperature carbonization of coal. Methods and results of the studies are presented and discussed. This report includes tables, illustrations, and photographs.

Report issued by the Bureau of Mines over studies conducted on seleniferous tuff deposits in Wyoming. Results of the tuff samples obtained are presented. This report includes tables, maps, photographs, and illustrations.

Report issued by the Bureau of Mines on the production of ammonia-synthesis gas in an annular-retort gasifier. The methods and results of the ammonia-synthesis gas production are discussed. This report includes tables, photographs, and illustrations.

Report issued by the Bureau of Mines over the characteristics and properties of many different crude-oil samples from Colorado. The properties of each sample are presented. This report includes table, maps, and illustrations.

Report issued by the Bureau of Mines over studies conducted on the beneficiation of iron-copper ores. As stated in the summary, "this report summarizes the results of laboratory testing of copper-bearing magnetite ore from the Poorman, Rush and Brown, and Copper Center deposits, Kasaan Peninsula, Prince of Wales Island, southeastern Alaska" (p. 1). This report includes tables, maps, and illustrations.

Report issued by the Bureau of Mines over explorations to find prospective copper mines near Valdez, Alaska. The results of the explorations are presented. This report includes tables, maps, and illustrations.

Report issued by the Bureau of Mines on a table developed for determining metastable transitions. The table is presented. This report includes tables, and illustrations.

Report issued by the Bureau of Mines over studies conducted on the geologic factors related to block-caving. The results of the study are presented. This report includes tables, maps, and illustrations.

Report issued by the Bureau of Mines over studies conducted on petroleum engineering and gas-injections in California. The results of the engineering study are presented. This report includes tables, maps, and illustrations.

Report issued by the Bureau of Mines over a study conducted on the Houston coal mine. Descriptions of the location, geology, and production of the coal mine are presented. This report includes tables, maps, and illustrations.

Report issued by the Bureau of Mines over studies conducted on bleeder application in bituminous coal mines. The methods and results of the studies are presented. This report includes illustrations.

Report issued by the Bureau of Mines over surveys conducted to determine the best fire-fighting technology for coal mines. The equipment, procedures, and cost of the technology were assessed. This report includes tables, maps, and illustrations.

From Introduction: "This report contains a summary of investigations conducted between 1940 to 1955. The characteristics of micro-seismims and the micro-seismic equipment are briefly reviewed. Generalizations regarding experimental procedure and analysis of results are presented."

From Introduction: "This report on the development of the oil-recycle process covers: 1. Review of the work in Germany on the first oil-circulation process. 2. Work by the Bureau of Mines, United States Department of the Interior. (a) Preliminary experiments on a laboratory scale, consisting of orientation tests and bench-scale operation, employing a 1-foot bed of catalyst in a 3-inch diameter vessel. (b) Operation of 2 pilot plants with a 4- or - 8 foot bed of catalyst in 3-inch-diameter reactors. Up to 3 gallons of C2+ hydrocarbons was produced per day in each of these plants. (c) Operation of a barrel-per-day pilot plant with an 8-foot bed of catalyst in an 8-inch-diameter reactor."

Report discussing standardizations when dealing with pumps for draining and storing water in coal mines.

Summary: "The engineering survey, summarized in this report, consisted of studies on acid mine water, underground-water pools, the "buried valley" of the Susquehanna River, inundated anthracite reserves, mine pumping plants, surface-water pools, seepage of surface water into mines, barrier pillars between mines, and geologic features of the region that included core drilling along alinement of the proposed Conowingo tunnel and to some extent along the proposed Marcus Hook alternate tunnel route. A comprehensive study was conducted to determine corrosion and erosion resistance of selected metals and alloys and to ascertain their suitability for components of pumps to be used in handling acid mine water."

From Introduction: "The investigations described in this report are a continuation and extension of these commercial and pilot-scale tests to include an investigation of the ignition and burning of solid fuels in thin beds, as on traveling - or chain grate stokers and a study of pure crossfeed combustion."

From Introduction: "One of the many services rendered by the Federal Bureau of Mines is the identification and general examination of ore and mineral samples. This publication describes methods of testing these samples. The object of this publication is to present the testing procedures in general use in the industry up to the point where the checking becomes a quantitative one for particular products."

Report issued by the U.S. Bureau of Mines discussing a survey conducted on molybdenum. History, geology, metallurgical properties, and production of molybdenum is presented. This report includes tables, illustrations, and maps.

Report issued by the U.S. Bureau of Mines discussing surveys conducted on the motor gasoline sold during the summer of 1956. The amount, location, and price of gasoline sold during this time are presented. This report includes tables, illustrations, and a map.

Report issued by the U.S. Bureau of Mines discussing surveys conducted on the motor gasoline sold during the winter of 1956-1957. The amount, location, and price of gasoline sold during this time are presented. This report includes tables, illustrations, and a map.

Report issued by the U.S. Bureau of Mines discussing the costs and methods of uranium mining in San Juan County, Utah. History, geology, and production of the uranium mines are presented. This report includes tables, maps, illustrations, and photographs.