Report issued by the U.S. Bureau of Mines discussing research conducted on the bituminous coal industry in the United States. As stated in the introduction, "in addition to research and development work of the coal industry, that of associated industries and coal consumers is covered" (p. 1). This report includes tables, and illustrations.

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The two plutonium-metal critical assemblies that have been studied at Pajarito Site are Jezebel, bare plutonium; and Popsy, a plutonium core in a thick normal uranium reflector. These assemblies and their properties are described.

An investigation of the effectiveness of a wing equipped with a sliding flap and a leading-edge slat in deflecting a propeller slipstream downward for vertical take-off was conducted in a static-thrust facility. Results regarding the characteristics with leading-edge slat and with extended flap chord are provided.

The following report summarizes studies carried out to see what the nature is of the coalified plant debris, uraniferous and nonuraniferous, that occurs in the Colorado Plateu, and if any relationships can be recognized between uranium and other elements of or associated with the coalified plant debris.

A report about elevated-temperature properties of dilute uranium-aluminum and uranium-zirconium alloys. Hot-hardness measurements show that small amounts of wither aluminum or zirconium increase the hardness of uranium at elevated temperatures.

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Discussing radioactive titaniferous heavy mineral placers in the San Juan Basin in New Mexico and Colorado.

The following slides document black sand deposits that were analyzed in the parent report, Radioactive Titaniferous Heavy Mineral Placers in the San Juan Basin, New Mexico and Colorado.

Report discussing a geological examination to find uranium deposits in the Colorado Front Range and adjacent areas from 1947-1951. "The investigations consisted chiefly of spot-checking mine dumps, outcrops, and road cuts, and included examination of stream beds, mill tailing ponds, and radioactivity traversing of selected surface areas, and mine workings."

A report regarding reconnaissance investigations for uranium in the Colorado Front Range and Adjacent Areas.

From introduction: Geophysical surveys have been made in the Uravan area, in southwest Colorado, with the aim of providing information on regional geology, especially on those aspects that may not be apparent from surface evidence alone. Aeromagnetic surveys were made in 1952, and regional gravity surveys were made during the summers of 1953 and 1954. Figure 1 shows the area covered. Information on surface geology was obtained from publications, from geologists working on the Colorado Plateau, and from personal observations.

Report discussing information produced from aeromagnetic and regional surveys conducted in the Uravan area of Colorado. This was part of a regional geology study of the Colorado Plateau.

The background for the conference is given. Plenary sessions papers are abstracted but discussions are quoted. Lists are included of technical sessions, U.S. papers, organizations, delegates, exhibits, with some pictures included, contents of the technical library and films available. Press releases are reported. Also included are two U.S. brochures prepared for the U.S. Exhibit, ''United States Research Reactor'' and ''Techical Exhibition of the United States of America.''

Report issued by the Bureau of Mines over petroleum-engineering studies conducted on Stephens Oilfield in Arkansas. The production history, and geology of the oilfield are discussed. This report includes tables, maps, and illustrations.

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The design, selection, and calculation of the Army Package Power Reactor shielding are described. The APPR-1, a prototype of a package reactor for remote locations, has a primary shield of Fe and water. This shield has been adopted to permit fast erection and to provide low transported weight. Economically, including transportation cost, the Fe--water shield is better thnn a Pb--water shield and is competitive with a concrete shield for a remote site. Because of its location at Fort Belvoir, Va., the shielding requirements for the APPR-1 are considerably more stringent than those for a reactor at a remote base. Since the secondary shielding which surrounds the entire primary system must provide protection for personnel at any location outside the vapor container, concrete is provided for this need. (auth)

Abstract. The design, selection, and calculation of the Army Package Power Reactor shielding are described. The APPR-1, a prototype of a package reactor for remote locations, has a primary shield of iron and water. this shield has been adopted to permit fast erection and to provide low transported weight. economically, including transportation cost, the iron water shield is better than a lead water shield and is competitive with a concrete shield for a remote site. Because of the location at Fort Belvoir,Va., the shielding requirements for the APR-1 are considerably more stringent than those for a reactor at a remote base. Since the secondary shielding which surrounds the entire primary system must provide protection for personnel at any location outside the vapor container, concrete is provided for this need.

From introduction: The Cordilleran Foreland has been defined by Osterwald (1956, p. 1) as "a region containing distinctive structural elements that forms a broad north-south belt parallel to and east of the Cordilleran geanticline...." The location of these tectonic regions is shown in figure 4 of this report. region are an important potential source of uranium in the United States. The accompanying maps (figs. 1, 2, and 3) show the location of most of the known uranium deposits and the localities from which samples, containing 0.01 or more percent uranium, or uranium minerals, have been obtained. The outcrop patterns of the principal ore-bearing formations are from the sources indexed on each map.

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Report explaining calculations for the oxidation and reduction of several minerals found in the ores of Colorado Plateau ores.