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Diffusion of beryllium-7 through polycrystalline unirradiated specimens of BeO was studied as a preliminary step to a study of diffusion in irradiated material. Beryllium-7 was deposited on one end of cylindrical specimens by exchange and adsorption from aqueous solution. The depth of penetration perpendicular to the surfaces of deposition was determined after annealing the specimens at pre-determined conditions. A simple lapping device of high precision was developed to determine penetration depths. For the polycrystalline cold-pressed and sintered BeO studied, the diffusion behavior between 1150 and 1800 deg C is described by the empirical relation: D = 2.49 x 10/sup -3/ exp -- (62.5 x 10/sup 3//RT) cm/sup 2//sec. A diffusion model is proposed based on vacancy migration which suggests identical activation energies for diffusion in both a and c directions in single crystals and predicts an activation energy of the correct order oi magnitude. Furthermore, the model p dicts that the frequency factor in the direction pexpendicular to the c axis should be about 50% higher than that parallel to the c axis. (auth)

A method is presented for designing a two-layer pressure vessel wherein contact between the layers is produced by controlled yielding of the inner vessel by internal pressure. The amount of prestress depends upon the dimensions of the vessel, the properties of the material of construction, and the prestressing pressure. The method takes into account the actual stress-strain curve of the material and satisfies the rules of plastic flow with work hardening. (auth)

Report documenting the design and testing progress of the Oak Ridge National Laboratory's Gas-Cooled Reactor Program.

From introduction: "Cytological examinations of the irradiated and some unirradiated populations in the radioactive sediments of White Oak Creek and the Clinch River were made."

Photocopy of an intelligence report addressed to Captain W. P. Gannaway of the Special Service Bureau in Dallas, Texas. The report, which was submitted by detective Bob K. Carroll, states that Karl Wahrmund was born in 1923 and is employed as a musician at the Cattleman's Steak House. Wahrmund was sentenced to the Texas Department of Corrections in 1951 for committing forgery.

Photocopy of a criminal intelligence report addressed to W. P. Gannaway of the Dallas Police Department. The report, which was submitted by P. M. Parks, states that a newspaper clipping from the New York Times is attached. The clipped advertisement requests donations for the defense of Jack Ruby by the Jack Ruby Defense Fund Committee.

Criminal intelligence report addressed to W. P. Gannaway of the Dallas Police Department. The report, which was submitted by F. A. Hellinghausen, presents a list of toll calls placed from the Carousel Club, the Vegas Club, Jack Ruby's residence, and Eva Grant's residence.

Criminal intelligence report addressed to W. P. Gannaway of the Dallas Police Department. The report, which was submitted by P. M. Parks, states that a newspaper clipping from the New York Times is attached. The clipped advertisement requests donations for the defense of Jack Ruby by the Jack Ruby Defense Fund Committee.

Photocopy of an intelligence report addressed to Captain W. P. Gannaway of the Special Service Bureau in Dallas, Texas. The report, which was submitted by detective Bob K. Carroll, states that Karl Wahrmund was born in 1923 and is employed as a musician at the Cattleman's Steak House. Wahrmund was sentenced to the Texas Department of Corrections in 1951 for committing forgery.

Criminal intelligence report addressed to W. P. Gannaway of the Dallas Police Department. The report, which was submitted by F. A. Hellinghausen, presents a list of toll calls placed from the Carousel Club, the Vegas Club, Jack Ruby's residence, and Eva Grant's residence.