From introduction: This report presents the geologic results of an exploration program conducted by the USGS in the Lost Creek area of Wyoming.

A report about the irradiated ultraviolet light emitted when thorium reacts with morin. The effect on the fluorescence of such variables as concentration of acid, alcohol, thorium, morin, and complex; time, temperature, and wavelength of exciting light are studied to determine experimental conditions yielding maximum fluorescence.

Report discussing the U.S. Geological Survey's reconnaissance for radioactivity in thirty-four metal-mining districts of the San Juan Mountains, Colorado during 1951-1953. General geology of the area, methods of reconnaissance, and results of the reconnaissance are included.

Report discussing a study to calculate the half-life of Th²³² and determine the branching ratio of Bi²¹².

From Introduction: "The purpose of this report is to present the preliminary results of the geologic reconnaissance and office work leading to an appraisal of the geologic relations of the uranium deposits of the San Rafael district, Emery County, Utah."

Report discussing an investigation of intrusive igneous rocks for radioactivity in New Jersey, New York, and New England during August and September 1951. This was aimed at finding uranium contents of economic significance in these rocks and determining the geological cause for any radioactivity. Results of the investigation are given by region, and a summary is included.

A report about spectrophotometric determination of thorium with thoron. Also, mesotartaric acid was used as a masking reagent for zirconium.

Report discussing uranium occurrences in carbonaceous shale and lignite beds in areas of the Townsend and Helena Valleys in Montana.

The following report evaluates the fluorescent system of the reaction between morin and thorium in weakly acid solutions in order to form a stable yellow complex which fluoresces yellow-green when its solutions are irradiated with ultraviolet light. The system is evaluated as a basis for the quantitative determination of trace amounts of thorium, and some of the theoretical and mathematical relationships between fluorescence and light absorption are also included.

A report of uranium deposits in Monument Valley, Utah and Arizona, which indicate that fluorescent silica may be used as a prospecting guide.

A report presenting the preliminary results of geologic reconnaissance and office work leading to an appraisal of the geologic relations of the uranium deposits of the San Rafael district, Emery County, Utah.

Discussing uranium in carbonaceous rocks in the Townsend and Helena Valleys, Montana

"A reconnaissance for radioactive minerals in the San Juan Mountains, Colo. (fig. 1), was started in the western part by W.S. Burbank and C.T. Pierson in 1951, and continued in 1952 by Pierson, W.F. Weeks, and F.J. Kleinhampl, and in 1953 by Pierson and T.H.W. Loomis of the U.S. Atomic Energy Commission in the western part of the mountains in reconnaissance and in examination of a pitchblende occurrence found by Loomis. The work on which this paper is based was done by the Geological Survey on behalf of the Division of Raw Materials of the U.S. Atomic Energy Commission."