Report that discusses the possibility of testing the T-invariance in β-meson decay. The author describes a past experiment performed by Lee and Yang, as well as the specifics of the proposed experiment to test the time reversal in β-meson decay.

"Comparisons are made of experimental and theoretical zero-lift wave drag for several nose shapes, wing-body combinations, and models of current airplanes at Mach numbers up to 1.0. The experimental data were obtained from tests in the Ames 6- by 6-foot supersonic wind tunnel and at the NACA Wallops Island facility. The theoretical drag was found by use of linear theory utilizing model area distributions" (p. 1).

Various metallographic techniques were employed to determine the best method for the preparation of Al-clad, Ni-plated U fuel elements for bond studies. The quality of the final results and the speed of the preparation were the most important factors to be considered. The procedure presented was found to yield the most advantageous results in the minimum amount of time. (W.L.H.)

This report presents an analysis of the projected economies and processing capacity requirements for a power reactor fuel reprocessing industry based on the recovery of fertile and fissionable materials from presently proposed power reactors within tbe confines of the continental United 8tates for the next five to ten years. An analysis of the present general state of development of a technology required for such an Industry is given. A summary of results of power reactor reprocessing chemical and engineering development at Oak Ridge National Laboratory from July 1955 through December 1956 is given. (auth)

Memorandum presenting a study of the impact loads experienced during full-scale and model tests in order to estimate the repeated loadings of seaplanes for long operating periods. The results indicate that the low landing speeds for antisubmarine-warafare seaplanes reduced the magnitude of the loads but that the more frequent landings and take-offs required for these operations greatly increased the total number of loads.

"An analysis of a sample of turbulence data obtained from VGH records taken on Lockheed U-2 airplanes during research flight up to 55,000 feet over England and Western Europe has indicated substantial reductions in the number and intensity of gusts with increasing altitude. These results on the variation of atmospheric turbulence over England and Western Europe were found to be in overall agreement with previous turbulence data obtained from airplane- and balloon-borne instruments over the United States" (p. 1).

Report presenting a discussion of the rolling effectiveness of deflected fins, flaps, spoilers, and jet devices that can be used on fin-stabilized ammunition. The possible applications and some of the significant factors affecting the performance of each device are described. The selection of one control over another appears to be mostly designer's choice with some exceptions depending on the roll requirements in a given situation.