Front: The text and illustrations highlight the issues in the atomic age, that humanity was perhaps at its most fateful crossroads. Photographs: Labor, industry sign wage agreements -- Radar reaches the Moon -- Pacific rendezvous -- Felix Gouin leads France -- Hans goes to the polls. Back: Highlights of 45 years (1901 - 1945) service of the Army Nurse Corps. Includes three photographs: U.S. nurses in Britain in 1918 -- Nurses in evacuation hospital, Sicily, 1943 -- Anzio : first nurses to receive Silver Star.

Front: Text highlights the new blueprint for a united democracy in China including Military Agreement, Coalition Government, and Civil Reform. Photographs: Prelude to unity: Gen. Marshall ... Generalissimo Chiang Kai-shek and Mme. Chiang -- New freedom for the common man -- "Cease fire" ordered in Chungking: Gen. Chou En-Lai and Gen. Chang Chun Back: Text and illustrations show how the world has grown very small in terms of travel time since the invention of the steamship, the locomotive, and the airplane.

Front: Text and illustrations highlight one of the kingdom of Iran and its vast, untapped oil reserves. Map: Iran. Photographs: The Shah of Iran, Mohamed Reza Pahlevi; British troops guard an oil refinery at Aradian; Mosque of Suz. Back: Text offers suggestions for making the most of post-war vocational and educational opportunities. Includes 7 photographs. Chart, Postwar Plans of Soldiers, is based on a survey conducted by the Research Branch of the Information-Education Division.

Front: Text describes proposed post-war Atlantic and Pacific U.S. fleets. Shows graphic silhouettes of the different types of ships. Includes chart of proposed Navy personnel. Back: Let's not be fooled again... Text includes: Pro-German attitude grows as U.S. troops fraternize -- We talk tough, but we act soft -- Soldier's opinions of Germans rising. Reasons given for post-war occupation of Germany.

"This manual prescribes the duties to be performed in the service of the piece [8-inch gun M1 and 240-mm howitzer M1] by the personnel normally assigned to one howitzer of gun section of the firing battery and by other firing battery personnel." Covers both the 8-inch gun M1 and the 240-mm howitzer M1. Prescribes duties to be performed in the service of both pieces of artillery.

"This technical manual is a guide for personnel who operate and maintain coal conveyors, stackers, car unloaders, and coal crushers." Discusses maintenance procedures, forms, and required inspections.

Report presenting tests of two typical low-drag airfoils of 90-inch chord to determine the effects of surface projections, grooves, and sanding scratches on boundary-layer transition. Data were obtained for projections of various sizes and chordwise locations on both low-drag airfoils.

Note presenting selected pressure-distribution diagrams for a number of conventional and special airfoils. The conventional airfoils include the NACA 22, 44, and 230 series airfoils and Clark Y family and the special airfoils consist of circular-arc sections of several thicknesses and a number of synthetic airfoils. The pressure distributions are in most cases given for several lift coefficients including that at the ideal angle of attack.

From Summary: "Reduction of pentaerythrityl tetrabromide in ethanol with zinc in the presence of sodium carbonate and sodium iodide was found to yield methylenecyclobutane, spiropentane, and 2-methyl-l-butene. Yields were 46 percent methylenecyclobutane, 21 percent spiropentane, and 12 percent 2-methyl-l-butene. The reduction procedure described offers a method of preparing both methylenecyclobutane and spiropentane from the same reaction in yields comparable with individual methods of synthesis previously reported."

Note presenting properties determined from tests on duplicate longitudinal and transverse specimens from aluminum alloy R301 sheets with three nominal thicknesses. The stress-strain, stress-deviation, tangent-modulus, and reduced-modulus graphs are plotted on a dimensionless basis to make the results of a limited number of tests applicable to materials with similar stress-strain curves and with yield strengths which differ from those of the test specimens.

"The purpose of the present work is to extend the previous investigation and to derive additional airfoil sections designed to minimize the undesirable characteristics of the previously tested airfoils. The tests of these additional airfoils were made in the Langley two-dimensional low-turbulence tunnel (LTT)" (p. 2).

A method is presented for determining the jet-boundary and plan-form corrections necessary for application to test data for a partial-span model with a reflection plane, an end plate, or no end plate in a closed circular wind tunnel. Examples are worked out for a partial-span model with each of the three end conditions in the Langley 19-foot pressure tunnel and the corrections are applied to measured values of lift, drag, pitching-moment, rolling-moment, and yawing-moment coefficients.

Report presenting an examination of the surfaces of used cast-iron piston rings from various single-cylinder aircraft engine tests by electron diffraction. Generally, the oxide patterns were obtained to an appreciable extent from only the top compression ring of the piston-ring assembly; the other rings gave predominately a graphite pattern.

Report presenting an investigation to determine the stability and control characteristics of a straight-wing, tailless fighter model with a pusher propeller in the free-flight tunnel. The investigation consisted principally of force and flight tests of a powered dynamic model. Results regarding longitudinal stability, longitudinal control, trim at high angles of attack, lateral stability, and lateral control are provided.

Report presenting the effects of large variations of lateral area on the lateral stability and control characteristics of a free-flying model when ailerons are used as the principal control as determined by flight tests. The effects of the lateral-force parameter were investigated for a wide range of values of the directional-stability parameter and the rotary-damping-in-yaw parameter.

Report presenting tests conducted with two typical low-drag airfoils of 90-inch chord to determine the effects of surface projections, grooves, and sanding scratches on boundary-layer transition. Data were obtained for projections of various sizes and chordwise locations on both low-drag airfoils.

Report discusses a series of force tests of a NACA 0009 elliptical semispan wing equipped with a flap that is either 50 percent of the wing area or 30 percent of the wing area. Information about the lift, hinge moment, and drag and pitching moment is provided.

From Introduction: "Fatigue life expectancy in normal transport operations was investigated in reference 1 and was found to be of equal importance with single-gust life. The effect of overload operation of transport airplanes on the probability of encountering single critical gusts was investigated in reference 2 and the frequency of critical gusts was found to increase rapidly with overload. The effect of overload operation on fatigue strength, however, has not heretofore been evaluated, hence the investigations of references 1 and 2 are combined herein to permit such evaluation and to determine the relative importance of fatigue and single-gust failures under conditions of overload operation."

"In conjunction with a program of research on the general problem of stability of airplanes in the climbing condition, tests have been made of a spring-loaded tab, which is referred to as a "springy tab," installed on the elevator of a low-wing scout bomber. The tab was arranged to deflect upward with decrease in speed which caused an increase in the pull force required to trim at low speeds and thereby increased the stick-free static longitudinal stability of the airplane. It was found that the springy tab would increase the stick-free stability in all flight conditions, would reduce the danger of inadvertent stalling because of the definite pull force required to stall the airplane with power on, would reduce the effect of center-of-gravity position on stick-free static stability, and would have little effect on the elevator stick forces in accelerated flght" (p. 1).

From Introduction: "The research program included clean-up tests (unpublished data) and stability and control tests (reference 1) made in the NACA Langley full-scale tunnel. An investigation of the aerodynamic characteristics of the power-plant installation in the Cleveland altitude wind tunnel is discussed in this report."

"The danger of shocks and separation in high-speed flight due to the presence of externally carried fuel tanks and bombs is pointed out, and a rough analysis of the phenomena involved is attempted. A discussion is given of the application and limitations of the superposition methods for calculating local velocities in the region between the wing and the external stores, and for predicting critical Mach numbers. Some suggestions for improved designs are also presented" (p. 1).

Report discusses the results of testing "to determine the relationship between impact normal acceleration and flight-path angle for seaplanes landing in smooth water" (from Summary). The tests were done at high and low forward speeds and trims at 6 degrees and 9 degrees, a 22.5 degree angle of dead rise, and a gross weight of 1100 pounds. Information about the forces acting on the aircraft and maximum depth of immersion and trim is provided.

Report discusses the results of testing "to determine the relationship between impact normal acceleration and flight-path angle for seaplanes landing on smooth water" (from Summary). The tests were performed at 12 degrees trim, 22.5 degree angle of dead rise, and a total weight of 1100 pounds. The effect on the maximum impact normal acceleration and the effects of immersion on acceleration are described.

Report presenting a series of dynamic tests undertaken on a model of a hull of JRM-1 in order to provide information on the probable water loads during rough water landings. The impact acceleration and trim data are analyzed to show the trend of accelerations with wave size and length-height ratio.