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.

Report discussing a procedure for determinion of thorium in monazite ores and other ores with diverse composition. This procedure can be used for high and low grade ores.

A generalized geologic map shows the locations of the uranium mines and some of the many occurrences and prospects in the Gas Hills district. Included also are recently-mapped structural features and results of analyses of uranium in water.

From abstract: "The Geological Survey's program of investigation of radioactive raw materials is presented herewith under present investigations, plans for future investigations, plan of operation, and cost of operation. This report was prepared at the request of the Atomic Energy Commission."

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.

Report discussing the U.S. Geological Survey's investigation of possible radioactive material sources in placer-mining areas and bedrock exposures near Teller, Alaska. This investigation was done during June and July of 1946.

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

From foreword: This is a progress report describing four tungsten mines in the Republic of Argentina that were examined between October 1942 and May 1943. The work leading to this report was carried on by the Geological Survey, United States Department of the Interior, and Direcci6n de Minas y Geologia, Ministerio de Agricultura de la Republica Argentina. This work was part of a larger cooperative program sponsored by the Interdepartmental Committee on Scientific and Cultural Cooperation and was carried on under the auspices of the United States Department of State. It is hoped that this cooperative work will be continued, for it is not only of direct practical use to miners but of high scientific interest.