From introduction: The sampling on which the estimates of ore reserves in this report are partly based was done by Lasky and Roberts. The text was written by Lasky, who, except where otherwise noted, is responsible for any descriptions, comments, and conclusions concerning the area beyond the limits of the Hanna holdings, as well as for all statements concerning reserves and recommendations for future prospecting.

From abstract: The Santa Clara coal district is 7 to 10 kilometers west of Tonichi, a small town on the Rio Yaqui, in southeastern Sonora, Mexico. Tonichi was the terminus of a branch railroad from Corral until May 1945, when the end of the line was removed. The coal deposits were developed by the Southern Pacific Railroad from the 1890's until about 1911, when the mines were abandoned, partly because the coal was found unsuitable for use in locomotives. Other coal deposits, near Los Bronces and San Javier, west of the Santa Clara district, were mined for a number of years to provide coal for a silver smelter at San Javier which was abandoned sometime during the 1920's. Since 1942 the Santa Clara deposits have been reopened; through 1945 about 50,000 tons of coal had been shipped, at first to the Boleo copper smelter at Santa Rosalia, Baja California, and more recently to Guadalajara, Jalisco, for the manufacture of calcium carbide.

From introduction: This is one of a series of detailed studies of the antimony deposits of Mexico, which were investigated by the United States Geological Survey and the Instituto de Geologia de Mexico. The investigation was part of a cooperative program sponsored by the Interdepartmental Committee for Scientific and Cultural Cooperation, under the auspices of the Department of State.

From introduction: The object of this paper is to describe the salient features of Jurassic diastrophism in parts of the Tonopah and Hawthorne quadrangles in west-central Nevada. The problem is complicated by the lack of continuity of exposures, earlier folding of the older rocks, metamorphism caused by the later granitic in-trusions, and by superposed Tertiary and later normal faults.

Report discussing field search of the U.S. Geological Survey. From abstract: "Field search in August 1946 failed to locate a reported occurrence of float from pitchblende veins in the Grand Creek area north of the Yukon River about 30 miles west of Tanana in central Alaska."

Report discussing a geological study for which the objective was to determine the age of Colorado Plateau carnotite. "In addition to quantitative analyses of uranium and lead, the radium-uranium equilibrium of each sample was studied."

From abstract: "This paper describes a quantitative fluorimetric method for the determination of small amounts of uranium..., useful for field and laboratory."

Report discussing a study in which "thorium nitrate is quantitatively extracted by mesityl oxide from solutions saturated with aluminum nitrate even in the presence of relatively large amounts of phosphate."

Report discussing the U.S. Geological Survey's investigation of radioactive materials in the Serpentine-Kougarok on the Seward Peninsula of Alaska.

Report discussing a study of 1,000 Gamma-ray logs of oil wells in the central part of the United States which confirmed the use of these logs for the detection of radioactive deposits.

Report discussing an Chattanooga shale adit for laboratory test samples of rock and gaining information regarding mining conditions.

Report discussing a geological experiment in which drill holes in carnotite deposits were logged with the objective of developing a technique for the stratigraphic correlation of ore-bearing beds.

From Abstract: "This paper describes a rapid routine procedure for the determination of phosphorous in the presence of vanadium. Vanadium is reduced with formic acid prior to precipitation of phosphorous as ammonium phosphomolybdate and the ammonium phosphomolybdate is weighed as such."

Report discussing geologic structures which localize carnotite deposits of the Colorado Plateau.

Report discussing a geological examination of an area in Polk County, Florida with leached zones containing uranium. The objective of the study was to determine the advisability of making plans for stockpiling the leached zone material in this area.

A report about commercial production of rugged portable radioactivity detectors. The objective in all cases is to use the fastest and most productive method of detecting radioactive deposits in a given area.

Report discussing a geological study of the mineralogy of the carnotite ores of the Colorado Plateau. The report reviews the work done during the 1948 field season and proposes work to be done during the 1949 season.

Report discussing phosphates found in Florida and investigations of uranium in the "Western Phosphate Field," which covers an area of about 100,000 square miles in Montana, Idaho, Wyoming, and Utah.

Report outlining fields of study for a program of research in the geochemistry of uranium. From Abstract: "Various specific topics and projects that apply to these fields of study are suggested."

Report discussing a fluorimeter intended for use in the fluorimetric method of analysis for uranium. This particular fluorimeter measures fluorescence by transmission rather than by the usual "reflection" methods.

Report discussing a method for detecting gamma radioactivity from ground sources with transport planes.

Report discussing a study in which "hydrated uranyl vanadates of potassium, sodium, ammonium, calcium, strontium, and barium were synthesized as part of a mineralogic study of carnotite and tyuyamunite."

Report discussing an investigation of radioactive Chattanooga black shale found in east central Tennessee.

Report discussing the U.S. Geological Survey's investigation of radioactive element samples found in the Candle Creek area on the Seward Peninsula of Alaska.