This report presents data on the absorption of tritium oxide vapor through human skin.

This report follows research done at the Purdue Research Foundation and Department of Chemistry on fluorocarbons done by the Office of Scientific Research and Development.

The following report records the study of the optimum pH of the method of the colorimetric dimethylglyoxime for nickel before the addition of oxidant and the concentration of ammonium persulfate needed to insure complete oxidation to higher nickel valence states and thus prevent precipitation of less soluble nickelous salt that was made. Results of this study is presented in Table 1.

The following report contains papers summarizing the activities of the various sections comprising the Isotope Research and Production Division of Y-12.

Appendix containing tables to accompany a report on aerial radiometric and magnetic reconnaissance survey of the Hot Springs Quadrangle.

The following report is a quarterly report conducted by the Monsanto Chemical Company for liquid waste disposal research, covering the period April through June, 1950. This report discusses experiments that were carried out with both neutralized second-cycle wastes and pure isotope which show that, in general, the presence of fluoride ion does not interfere with the removal of fission products from waste solutions.

The following report provides equations that result from a seminar in reactor physics.

Microfiche of Field and Laboratory Data for a report regarding stream sediment detailed geochemical survey for Marysville, Utah.

Discussing the geology of uranium deposits in the Cochetopa District, in Saguache. County, Colorado

A field investigation undertaken to determine the applicability of electric-radiometric logging techniques

A report discussing an airborne radiometric survey of the Lone Pine, California project.

Monthly report of the U.S. Geological Survey's trace element investigations including an outline of field work, laboratory work, and staff activities that have been completed or are in process.

Recent instrumental developments and theoretical speculation have indicated a need for more information concerning the excited electronic states of polyatomic molecules and ions in the elucidation of mass spectra. A theoretical description of these states is necessary for the proper interpretation of existing data and in laying a firm basis for the planning of future experiments. For the above reasons the energies of a number of the excited electronic states of methane have been calculated in a approximate fashion and the results applied to a discussion of the behavior of the methane ion.

A MO calculation of the electronic states of CH4, CH3, CH2, CH, and their respective ions provided the basis for the application of correlation rules to an analysis of the existing appearance potential data for methane. An interpretation of the methane mass spectrum has been proposed which is based on the high value of the heat of sublimation of carbon. It is shown that the excited electronic states of the molecule- and radical-ions are prominent in the decomposition reactions.

There is at present a large collection of data giving the relative abundances of ions formed when molecules, especially hydrocarbons, are bombard with electrons and collected as positives ions in a mass spectrometer. This data per se gives us little insight into the kinetic processes occurring until it is combined with thermodynamic data and subject to a theoretical treatment based upon an assumed model for the kinetic processes taking place in the mass spectrometer. In accordance with our desire to learn more about these kinetic processes and in this way to shed some light on problems of molecular structure we have continued to explore the possible kinetic paths which propane ions take during their decomposition, with special reference to the effect of the substitution of deuterium for hydrogen.

A report about the mechanical properties of dilute uranium alloys which might be crucial to developing high strength alloys for possible use as fuel.

Technical report. Quite pure anhydrous ThCl4 in small quantity (8-10 g charge) has been prepared by the action of a mixture of Cl2 and CCl4 vapor on ThO2 at 675 degrees to 725 degrees C.

Maps of exploration sites for the U.S. Geological Survey's Trace Elements Program field projects from June 1951.

Monthly report of the U.S. Geological Survey's trace element investigations including an outline of field work, laboratory work, and staff activities that have been completed or are in process.

Report discussing progress made by the Metallurgy Division of the Physics of Solids Institute during the quarter ending January 31, 1951.

Table showing the estimated reserves of vanadium-bearing rock in the Paris-Bloomington, Montpelier, Sublette Ridge, Swift Creek, and Strawberry Creek - Greys River Divide extraction areas in west-central Wyoming and southeastern Idaho. Indicated tonnage and inferred tonnage values are given for each area in millions of tons, along with the percentage of vanadium ore rock, maximum and minimum thickness, and average thickness of the rock in the extraction area.

Report containing descriptions of the Liquid Metal Fuel Reactor Experiment's reactor, containment, and plant design. Includes analyses of associated environmental hazards.

Single record data listings taken during aerial gamma-ray and magnetic surveys of the Tyonek Quadrangle in Alaska.

Average record data listings taken during aerial gamma-ray and magnetic surveys of the Seward Quadrangle in Alaska.