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.

Summary: The activity coefficient of Pu(Cl04)4 was measured in perchloric acid solutions. The procedure used was to measure the extraction of the neutral plutonium(IV)-TTA chelate into benzene-TTA solutions at different perchloric acid concentrations. Equations are presented which show the relation of the extraction coefficients, obtained in the above manner, to the activity coefficient of plutonium(IV) per-chlorate. The activity coefficient of Pu(Cl0~)4 is similar to that of a strong acid, e.g., perchloric acid, in that its value increases rapidly when the perchloric acid concentration becomes greater than 2M. The distribution coefficient of TTA between benzene and aqueous perchloric acid solutions was found first to decrease slightly and then to increase two fold as the perchloric acid was varied from 0.01 to 6M. The activity coefficient of the uranous-TTA chelate in benzene was calculated from the results of solubility measurements. The values of the activity coefficient of UK4 are,within experimental error, identical with the values of the activity coefficient of TTA itself.

The following report describes the results from studies based on the toxicity and metabolism of radioactive substances derived from uranium fission. Rats and mice were administered radioactive sodium and reactions and changes were studied.

Report detailing the development of an apparatus for injection of animals with dangerous amounts of hard beta and gamma emitters. The development of this apparatus was necessitated by the extended period of time that experimenter's had to hold syringes containing radioactive material.

Quarterly report discussing the progress made with various projects at Argonne National Laboratory during the period from January to March 1948.

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

Construction of a linear accelerator which increases the energy of protons from a 4 Mev Van de Graaff injector to a final energy of 31.5 Mev.

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."

Historical: This process is based on experimental work done in Jackson Laboratory, Send Works, Blue Products, and East Area. It supersedes the Tentative Chambers Works Process for the Manufacture of Fluorine Using Carbon Anode Units, dated December 2, 1943.

Abstract: The rate of extraction of PuIV in either direction between benzene-TTA and aqueous HNO3 solutions is shown in the present study to be fast enough so that application of the chelate process to continuous operation should be feasible. This conclusion is based on two primary considerations: 1. The mechanism limiting the rate of extraction appears to be diffusion and not chemical-reaction-limiting. 2. The extraction may be controlled by adjustment of the system conditions to give almost any desired specifications of rate and/or equilibrium. A continuous process involving multiple extraction stages with a controlled pH gradient is proposed for obtaining maximum decontamination and plutonium recovery.

A quarterly report consisting of reports published on Transuranic Elements from the University of California Radiation Laboratory. Each report is a brief one to two page summaries of the article submitted for publication during the months of September-November, 1948.

The following report describes how to obtain traces of cadmium using dithizone as a reagent.

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

From introduction: "Two fluorimeters have been constructed for the determination of small amounts of uranium. There fluorimeters have been constructed after the basic plans for the Model V fluorimeter developed at the University of Rochester School of Medicine and Dentistry and described in the Journal of Biological Chemistry for March 1948.

Report describing the results of corrosion tests on 68 types of materials. Generally, most materials were tested with an agitator and vapor and some were tested a 3rd way with alternate immersion.

Abstract: "The compounds UCl3, UBr3, IaCl3, LaBr3, La(OH)3, CeCl3, CeBr3, PrCl3, PrDr3, Pr(OH)3, HdCl3, and Hd(OH)3 are shown to be isomorphous. They have hexagonal structures with two molecules per unit cell. The complete structures are determined and described."

Abstract: "The uranium content of badly contaminated uranium solutions may be determined quickly using visual comparison methods to an accuracy of [...]. This accuracy may be considerably improved by employing the fluorimeter herein described. Interfering ions and their removal using liquid-liquid extractions are considered."

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.

A report made of the examination of a prospect in the White Signal mining district of Grant County, New Mexico.

The following report investigates the excretion data of dogs who were injected with strontium89.

The following report describes the use of two experimental facilities used to evaluate the Schenectady Pile. The facilities are divided into nuclear physics and chemistry experiments, and testing of pile components and materials under pile conditions. This document discusses the experiments taken place in these facilities to evaluate the pile.

Purpose: "To study the value of electrical induction methods for the measurement of liquid and interface levels."

Maps of Trace Elements Programs field projects, including locations of drill holes for the Colorado Plateau project and location of eastern oil shale in Tennessee.

This report describes the preparation and testing of corrosion on brazed, vacuum-tight aluminum joints for finned aluminum tubing to contain uranium slugs.