Technical paper issued by the Bureau of Mines over analyses of coals from many western states. The characteristics of the coals found in each state are discussed in detail. This paper includes tables, and maps.

A report about the development of several instruments, projects, and activities under the Physics Division.

Report issued by the Bureau of Mines discussing exploration of Lewis County lignite deposits in Washington. History, development, and drilling methods are presented. This report includes tables, maps, illustrations, and photographs.

Biweekly, comprehensive compilation of decisions, reports, public notices, and other documents of the U.S. Federal Communications Commission.

Report of the annual conference on weights and measures, hosted by the U.S. National Bureau of Standards in Washington D.C. It includes conference proceedings, a list of attendees, information about committees and officers, and other reports or commentaries discussed at the meetings.

Distributional study of the pocket gophers of Arizona, including economic status and species and subspecies.

From introduction: "This report covers work done and the estimated costs of recovering metallurgical-grade alumina from the clays found in those deposits."

Stillwater Safety Council report of programs, newspaper clippings, photographs, letters and forms relating to the safety and police support for the citizens of Stillwater, Oklahoma. Includes Ordinance no. 559.

The report provides data and information about communicable and reportable diseases in Texas during 1946, broken out by county.

Report from Texas Cotton Industries including miscellaneous income and expense reports and tax records for multiple farms for the year 1947.

Annual report of the Texas Department of State describing goals, activities, and accomplishments during fiscal year 1947.

A report about the process by which the insulators used in the calutron acquire a conducting coating which is found to be a thermochemical process.

A report which provides procedures for sample decomposition and the determination of small amounts of uranium in the phosphate rocks and shales. Also, the cupferron and ether-extraction methods are discussed.

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 earthquake activity in the United States during 1947. The report is broken down by regions and has sections for specific earthquakes.

The following report follows a study that was made to find alternative methods for the characterization of the uranium tetrafluoride.

A report providing abstracts of all of the addresses given at the first Short Course in Development Fund Affairs "conducted at the University of Virginia".

From introduction: "The purpose of this report is to summarize some of the information obtained to date on the distribution of the uranium in the mineral phases of the phosphate rocks and shale."

Abstract: "It has been found that the two principal uranium isotopes exhibit slightly different arc spectra. Certain U-235 lines have been found to be displaced from corresponding U-238 lines by about one reciprocal centimeter. The intensity ratio, IU235/IU238, has been shown to be a steadily increasing function of the U-235 concentration. These data indicate the possibility of developing a method for the determination of isotopic concentration by means of emission spectra."

Abstract: "The Calutron has been successfully employed to separate the stable isotopes of twenty-one elements. The standard Beta M-2 unit modified to handle charge materials of various temperature ranges has proven adequate for a majority of separations. The problem of K life has received considerable attention but is still to be solved. Other operational problems are similar in most respects to those of uranium. The E design has, of necessity, varied greatly from the "Beta Gloria" type. A desire to keep construction simple, yet adequate for efficient collection and readily adaptable for use with many elements, has dictated the trend in E design. Water cooling on the receiver pockets was necessary with many of the elements separated. The chemical purification of the separated samples, although following a general pattern, varies with the type of pockets used and the element collected."

Abstract: This report deals with the development of a method using tracer technique for determining uranium extraction coefficients on solutions of low uranium concentration. It was found that extraction coefficients could be determined on systems containing as low as one part per million uranium using 1900 level uranium as the tracer. Results of several extraction series are presented in which aluminum nitrate is used as the salting agent and dibutyl carbitol the organic extractant.

This report analyzes the separation of ions using the velocity of the ion measured through a long evacuated drift tube.

This report discusses two methods used for experimental determination of the interfacial tension of an immisible aqueous-organic system where the density of the organic phase is less than that of the aqueous phase. The methods discussed are the falling drop method and the Donnan modification/rising drop method.

Corporation income tax return of 1946 for Texas Cotton Industries. The return includes all necessary schedules and financial statements, including the schedule of capital gains and losses.