This report follows a preliminary geophysical investigation that was made in the Colorado-Utah Plateau in search of carnotite ore deposits.

A report regarding pegmatites of the Errington-Theil mine, Elko County, Nevada.

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.

The following report describes the findings from an investigation of a uranium-bearing strata undertaken in Hickman and adjacent counties in west-central Tennessee during the summer and fall of 1944. The strata contained radioactive elements within the Chattanooga shale and the Maury glauconitic member of the Ridgetop shale.

The following report provides a summary of detailed procedures and methods given to small quantities (as low as 0.10 mg) of thorium in rocks and ores.

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

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

The following report was undertaken to overcome poisoning difficulties that are caused by passage of solutions containing nickel through the Jones reductor/zinc amalgam reductors.

The following report describes findings from a reconnaissance mission in Alabama, Georgia, and North Carolina on radioactive trace elements in a variety of rocks.

The following report provides results taken from more than 600 samples found in Alaska, mostly concentrates from placer operations, that were tested for radioactivity during January 1945 in the laboratory of the Geological Survey.

Abstract: Procedures are presented in detail of two methods for the determination of very small percentages of uranium (down to 0.002%). The methods are applicable to a wide variety of materials. Notes on the methods and confirmatory experiments are also given.

The following report provides information that follows investigations of radioactivity in certain rocks found in Wyoming and South Dakota during the summer of 1945. Uranium is the principal element in this report with thorium as secondary.

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

The following report is the result of a reconnaissance of the black shales of the Eastern United States in the summer of 1944. The purpose of this reconnaissance was to determine the radioactivity of the shales, specifically for uranium and thorium.

The following report provides findings of trace elements from investigations on Cache and upper Peters Creeks in the Tentana District, Alaska after discovering radioactive minerals within Geological Survey's collection of Alaskan placer deposits. This investigation took place in the summer of 1945.

Report discussing the U.S. Geological Survey's investigation of radioactive trace elements along the highways in Tanana and upper Copper River valleys.

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.

Report discussing the U.S. Geological Survey's investigation of the radioactivity measurements of asphalltites, coals and shales found in Tennessee, Kentucky, West Virginia, and Pennsylvania.

This report is the second in the series of reports carried by the Geological Survey on rare or uncommon elements and their possible sources. The report discusses xenon, an element belonging in a group of elements known as the inert gases, characterized by its lack of reactivity.

The following document contains two reports providing results from reconnaissance missions in Florida. These missions tested the radioactivity in Florida sands and the radioactivity in phosphates and rocks found in Florida.

The following interim report provides information on the radioactivity discovered in the Chattanooga shale that consist of a basal sandstone, a lower black shale, a middle gray shale, and an upper black shale.

The following report is based on the findings of a Geological Survey party who spent one week during July 1944 in western North Carolina testing some of the Pegmatites and one Kyanite mine of that region for radioactive minerals.

Abstract: The Control Chart statistical methods, developed by Showhart for the control of quality of manufactured products, are applied to the control of Geiger-Miller counting instruments. Experiments are reported to show the use to the Control Chart method for detecting disturbances in instrumental behavior and for detecting radioactive effects so weak that they are near the limit of detection of the instruments. As a corollary, the control chart can be used to reduce to its practical limit the time required for tests.

The following report provides a summary and the methods of the experimental work given with a small percentage of thorium oxide.