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 on the study of contamination of cores obtained with conventional core barrels. The effect of the oil-based drilling fluid and analysis of the cores are presented. The report includes tables, graphs, and illustrations.

Report issued by the U.S. Bureau of Mines describing the methods and equipment developed at the oil-shale mine near Rifle, Colorado. This report includes photographs and illustrations documenting this equipment.

Report issued by the Bureau of Mines over exploration of lead-zinc deposits in Colorado. The geology, location, and physical features of the deposits are discussed. This report includes tables, maps, photographs, and illustrations.

Report issued by the Bureau of Mines over exploration of the lead and zinc deposits of the Madonna Mine. Descriptions of the deposits are presented. This report includes tables, maps, and illustrations.

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 an annual study of synthetic liquid fuel production. Results of the annual study are discussed. This report includes maps, tables, illustrations, and photographs.

Report issued by the Bureau of Mines over studies conducted on Colorado oil-shale. Description of the N-T-U retort is presented. 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 U.S. Bureau of Mines on the oil-shale reserves near the Green River formation. Samples are analyzed for economic value, and presented in tables and illustrations. The report also includes maps of the sample areas.

From introduction: The objective of the investigations is to test the usefulness of these geophysical procedures in connection with exploration for uranium-bearing mineral deposits.

From Introduction: "A preliminary report of the work was published in April 1947, and this bulletin supplements Report of Investigations 4104 and describes the results of the entire investigation."

From Summary and Conclusions: "The objective of this investigation has been stated above in the Introduction. Studies were made of mining operations in the Athens Basin, Rafina and Oropos districts; the Kimi and Aliveri areas on the island of Euboea; and the Peloponnese in the vicinity of Kalamai. (See fig. 2). Mining practices at mines in these areas are summarized briefly in this report. Samples of lignite were shipped to Bureau of Mines experiment stations at Pittsburgh, Pa., and Golden, Colo., for washability and utilization studies."

From Forward: "This bulletin is the first of a new series, which includes analyses of only tipple and delivered coal. It covers samples collected throughout the United States from July 1, 1947 to June 30, 1950 (fiscal years 1948-50). It is planned that future publications of this series will cover a period of one fiscal year only and be issued as soon as possible after June 30 of each year."

Report issued by the U.S. Bureau of Mines discussing iron deposits found in Colorado. As stated in the summary, "this paper describes the location and general features of iron occurrences in Colorado" (p. 1). History, geology, production, and use of Colorado iron ore is presented. This report includes tables, illustrations, and a map.

Report issued by the U.S. Bureau of Mines discussing the mining costs and methods of uranium ores in Colorado. As stated in the introduction, "this report describes the relatively small-scale operations of the Salt Wash miner: the mining methods followed, the equipment used, and the production costs" (p. 1). This report includes tables, maps, illustrations, and photographs.

Report issued by the U.S. Bureau of Mines discussing metal mines in Colorado. As stated in the summary, "this paper describes the mineral deposits and discusses mining and milling methods and related operating conditions in an important gold, silver, lead, and zinc producing area in Ouray, San Juan, and San Miguel Counties, Colo., embracing 250 square miles" (p. 5). This report includes tables, maps, and illustrations.

Report issued by the Bureau of Mines over mineral characteristics, uses, and problems. Descriptions of common minerals and their uses are presented and discussed. This report includes tables, maps, and illustrations.

Report documenting the suitability of Colorado for plant locations to produce synthetic liquid fuels, based on raw materials such as coal, oil shale, natural gas, and oil-impregnated strippable deposits.

Volume of supplementary data, illustrations, and other information related to a study of the suitability of areas in Colorado for developing coal, natural gas, oil shale, and other deposits into synthetic liquid fuels.