A summary of work is presented from the 234-5 Development Group, September 1, 1950, with regard to the feasibility of transferring the plutonium processing solution, without evaporation, to the Purification Building. Critical factors identified were the concentration of the nitric acid and temperature.

From Introduction: "This investigation provides general information on the magnitudes and directions of the aerodynamic forces and moments acting on a fighter airplane in fully developed spins. The investigation includes the determination of the effects on the aerodynamic forces and moments of varied rudder setting with and against the spin, of tail modifications, and of deflected flaps and lowered landing gear."

"The first basic problem that must be solved before control synthesis can proceed is that of determining the dynamic characteristics of the engine. Accordingly, an analysis of the dynamic behavior of the turbojet engine with tail-pipe burning was made at the NACA Lewis laboratory and is presented herein" (p. 1).

From Introduction: "The design of turbojet-engine control systems is intimately related to the dynamic characteristics of the engine and has advanced to the stage where theoretically correct control constants can be determined for fixed dynamic properties (references 1 and 2). The use of the thermodynamic equations presupposes that the engine processes are quansi-static. Such an assumption is shown to be valid for a turbojet engine in references 3 and 4.

Report presenting a metallographic study of the interface between various elements and titanium carbide. Hardness measurements of the different elemental combinations are also provided.

Report issued by the U.S. Bureau of Mines discussing wood waste that is used for commercial heat and power. The development of wood burning equipment is presented. This report includes tables, illustrations, and photographs.

Report issued by the U.S. Bureau of Mines on the study of pumping at anthracite mines in Pennsylvania. The study was conducted in order to solve anthracite mine-water problems. The report includes maps, photographs, and illustrations.

This report investigates multiple scavengings using Super Filtrol as a scavenging agent for removing zirconium and niobium from Hanford dissolver solution.

Report presenting the design, development, and performance of equipment suitable for use by educational institutions for student training and basic compressible-flow research. Supersonic nozzles designed for a range of Mach numbers were tested in the blowdown tunnel and produced average Mach numbers close to the design values.

Report presenting an investigation of the effectiveness of molybdenum disulfide as a fretting-corrosion inhibitor. Six methods of applying MoS2 to steel specimens was evaluated by noting the number of cycles of vibration required to produce the first evidence of fretting corrosion and by observing the nature of its occurrence. Experiments were conducted with steel balls vibrating in contact with glass flats whereby the action could be microscopically observed.

"Five stiffened circular cylinders were tested to failure under various combinations of torsion and compression. The results of the tests are presented in the form of plots of stringer stress against cylinder load and an interaction curve for the strength of stringers that fail by local crippling. A method is given for calculating stiffener stresses in cylinders subjected to combined loads, and a comparison between calculated and experimental stringer stresses is made" (p. 1).

Abstract: "Computations have been made of the total beta activity of the fission products arising from the slow neutron fission of U-235. A curve is given exhibiting the activity the activity per unit fission, for time intervals after fission ranging from 0.01 second to 10 years. This influence function is compared with some published experimental data and with the statistical curve of Way and Wigner. A curve facilitates estimation of the activity in the particular case where the fission rate has been constant throughout a known time interval. Finally, an influence function for the particular group of fission products consisting of complete and partial chains having volatile first members is given. This report is based on studies conducted for the Atomic Energy Commission under Contract AT-11-1-GEN-8."

Report discussing the geochemistry of gadolinium, specifically the abundance of the element and its isotopes in the earth's crust.

Report presenting flow surveys made in a nozzle investigated in the 11-inch hypersonic tunnel. The nozzle was designed for a Mach number of 6.98 and was tested using a two 2-dimensional steps to gradually expand the air in the horizontal and vertical planes. The flow in the test was not sufficiently uniform for quantitative wind-tunnel test purposes.

Report presenting the experimental frequency-response characteristics of engine speed for a typical turbine-propeller engine. The data were obtained by subjecting the engine to sinusoidal variation of fuel flow and propeller-blade-angle inputs. A comparison of the analytical and experimental results is provided.

The analytical results of Part I are also applied to sound dispersion by friction and heat conduction, An irreversible change of momentum, energy, and type of particle corresponding to friction, heat conduction, and diffusion effects can appear both in the direction of the sound field and traverse to it. Longitudinal damping, the coupling of longitudinal damping and that due to chemical and physical changes, and coupling of diffusion and compositional changes are treated for a plane sound wave of infinite extent.

Memorandum presenting a treatment of the problem of the differential isentropic changes of state in dissociating gases.

Report presenting charts by which the jet pressure ratio that gives optimum division of power between propeller and jet for maximum total thrust power may be determined for any turbine-propeller engine with or without intercooling, reheat, regeneration, or any combination of the three modifications. The method of obtaining optimum power division is compared for two sets of conditions with two other methods that have been widely used.

Report presenting a method for convenient determination of the pressure drop sustained by air flowing at high subsonic speeds in a constant-area passage under the simultaneous influence of friction and heat addition. Air-pressure-drop working charts based on the method are presented.

A report regarding a preliminary examination of uranium deposits near Marysvale, Piute County, Utah

A report regarding Preliminary reserve statement 1, reserve block 1, Club Mesa, Montrose County, Colorado

Preliminary reserve statement on the drilling of ore deposits in Club Mesa, Colorado.

A report regarding Preliminary reserve statement 3, reserve block 5 (east part), Club Mesa, Montrose County, Colorado

Preliminary reserve statement on the drilling of ore deposits in Club Mesa, Colorado.