The following report analyzes studies of chronic inhalation toxicity from uranium tetrachloride dust in animals who were exposed daily for a year for the purpose of determining "borderline" or safe levels of exposure for the duration of one year.

The following report studies the neutron activation cross-sections with the insertion of boron absorbers in the energy region 10 to 20,000 ev and the elements within the range.

Report discussing the preparation of uranium hydride and its properties such as density, crystal structure, and number of atoms per unit cell. From abstract: "The pressure-composition isotherm as well as other data indicates that uranium hydride is a true compound."

The following report contains the derivation of a general expression for the magnetic field within an interrupted solenoid.

The following report analyzes experiments on the exposure of toxicity of uranium hexafluoride fumes on animals for a year in order to evaluate chronic toxicity and to estimate a "maximal tolerated concentration".

Report discussing equipment that can be used to perform chemical and mechanical operations involving radioactive materials safely. Illustrations of the equipment are provided.

From abstract: "The methods of preparation of the sulfides of cerium, thorium, uranium, and barium are discussed. Where necessary, the apparatus are described. Procedures for the handling and grinding of the sulfides and hydrides which are used for their preparation are given...The physical, mechanical, chemical, and thermodynamic properties are given for various sulfide refractories which have been developed at the Berkeley, California chemical laboratories."

Report discussing experiments in which the uranium-nitrogen system was "subjected to chemical and x-ray study." The results of these studies "require that previously published descriptions of the system and formulas for the nitrides be replaced."

From abstract: "An empirical analysis was made of the quantitative characteristics of the sedimentation process in a large group of Metallurgical Laboratory employees. The data consisted of 20-. 40-, 60, and 80-minute readings on Westergren tubes."

The following document describes some studies of the radioactive isotopes of cerium and lanthanum lying on the light or neutron-deficient side of stability.

From abstract: "In a large series of rabbits, both the responses exhibited by the animal and the fate of the dose have been observed following the intratracheal insufflation of a soluble (uranyl nitrate) and an insoluble (U30g) compound, large (100mg) and small (5 and 10mg) doses have been given. For comparison, in a third series of tests a large fose of uranyl nitrate was injected intramuscularly."

Report describing the results of a study conducted to investigate the chronic inhalation toxicity of uranyl nitrate. The results of four long-term animal exposure studies are described.

This report studies the effect of x irradiation on the maturation of the circulating reticulocytes, using samples of rabbit blood with and without phenylhydresine- or bleeding-induced anemia and comparing them to the blood of human subjects under similar circumstances.

The following report investigates methods of purification of several commonly used gases using uranium and certain uranium salts.

This report follows experiments on the acute effects of 200 kv X-ray treatments on chickens in a series of 200 animals exposed to doses of 2 r to 1200 r, with an additional 100 chickens.

From abstract: "The uranium-hydrogen system has been examined by X-ray diffraction. This study has revealed one cubic hydride (UH3). Since the structure of the hydride is unrelated to the structures of any of the metal and the hydride has a definite composition, it is not an interstitial solid solution but a true compound."

From abstract: "Compounds of tetravalent uranium containing two halogens have been prepared. Six combinations of the four halogens are possible, and at least one compound of each group was made. X-ray diffraction patterns were made in most cases and cooling curves of melts were made for the bromachlorides. The two general methods of preparation used were (a) reaction of a uranium trihalide with a halogen of greater atomic weight and (b) interaction of two tetrahalides."

Report discussing experiments that were performed to determine whether amino acids in urine could be used as a test of subtle uranium poisoning.

The following report discusses the renewed element 43, or eka-manganese, whose discovery was heralded in 1925, but whose chemical properties remained unreported until the radiochemical investigations of Perrier and Segre."

Abstract: "Previously, an acquired tolerance to the toxic action of uranium compounds was developed in two mammalian species, rats and rabbits. In rats made tolerant by repeated injections of uranium an increased excretion of urinary citrate was demonstrated. In these experiments a tolerance to uranium has been produced in dogs. Further, these tolerant dogs evidenced an increased excretion of urinary citrate. The significance of these results is described."

Report of example scenarios and useful equations for determining the production of radioactive isotopes by pile or other radiations.

Three charts of copper, brass, and steel construction for use in nuclear reactors.

Chart showing type of radiation and isotope classification for each element, in a periodic table layout.

From abstract: "A comparison has been made of methods for producing Fe59 of higher specific activity than that obtainable by irradiating natural iron in the Clinton pile. Five processes have been considered, (1) irradiation of natural iron in the Hanford piles, (2) irradiation of enriched F58 in the Clinton and Hanford piles, (3) Szilard-Chalmers enrichment using ferrocyanides in the Clinton pile, (4) collection of recoils in a phase separable from the bulk of the iron, and (5) the Co59 (n,p) Fe59 reaction in the Clinton and Hanford piles."