Front: Text describes action on various war fronts: Central Pacific, Italy, USSR, Air war, Burma. Maps show Marshall Islands; Allied advances during the week. Photographs: Artillery technique in Italy; American helmets of the 25th Division and hats of a New Zealand brigade mingle at Vella Lavella; Navy mobile photographic laboratory comes ashore in the Solomons; African Goummiers of the Fifth Army don traditional gowns over American uniforms; Pilots of the 99th Fighter Squadron talk tactics; German transport vehicles retreat from the Soviet front; Photographer positioned where a .50 caliber gun would be mounted in a Navy reconnaissance Liberator; Soldiers stuff 250 pamphlets into each 25 pound shell in Italy; Fifth Army infantry battalion's 81 mm. mortars travel by mule in Venafro. Back: Jap army uniforms. Color illustrations of seasonal and miscellaneous uniforms of officers and men.

Front: Text describes action on various war fronts: USSR, Italy, Marshall Is., Southwest Pacific, Paramushiru, Air offensive. Inset maps: [South Pacific], [Kwajalein], [Soviet border from Sept. 1, 1939 to Nov. 5, 1943]. Includes photographs: Captured Japanese light tank, Mt. Trocchio, Nettuno beachhead, British anti-tank gun. Back: Central Italy. Map with inset of oblique view showing difficult terrain.

Front: Text describes action on various war fronts: Italy, USSR, Western Europe, Southwest Pacific, Central Pacific, Submarines. Maps show the Gulf of Finland, Russia; Italy. Inset map shows Cassino area, Italy. Includes 11 photographs. Back: Landing Craft. Illustrations and photographs of various landing craft with descriptive text.

Front: Text describes action on various war fronts: Central Pacific, Southwest Pacific, Air war, Burma, USSR. Maps show air attacks from London to various sites in Germany; New Ireland; south Pacific; Truk Is. Includes photographs: "Island forts", Marine corps set up radio telephone sets at Roi Island, Leathernecks set up machine guns immediately upon landing, All-Negro Ninety-Ninth Fighter Squadron at Anzio, German prisoners disembark from an LST to a prison camp, wounded female Jugoslav guerillas arrive in Malta, General Sir Harold Alexander chats with Yank rangers near Cisterno. Back: Text states "In Mein Kampf, Hitler stated that his plan was to destroy France first, then England, after which he would have the United States cornered without a fight!."

Describes the nutritional benefits of potatoes and provides recipes for a variety of ways to prepare them for different sorts of meals.

Volume provides a summary of the progress of each agricultural experiment station. Also includes statistics, discussions of foreign investigations, and selected studies.

Describes "the organization and operation of the railway-operating battalion upon a railway operated by the Military Railway Service. Its purpose is to assist military railway officers in the training and operation of their units and to guide command and staff officers charged with their employment."

Describes aircraft engine systems, fuels, and lubricants.

Discusses the relationship between Army scouts and their commanders, and the implementation of successful combat plans. Also discusses the role of snipers in disrupting the enemy's operations.

"The scope of the manual includes discussion and illustration of organization, equipment, training, and methods of employment of the mechanized cavalry reconnaissance troop and its components, designed to simplify and speed training and to facilitate understanding of basic doctrine."

Report presenting an investigation of the effectiveness of suction slots as a means of extending the laminar boundary layer in flight at high Reynolds numbers on an NACA 35-215 airfoil. The results showed that, with a slot spacing of about 5 percent of the chord, the laminar boundary layer could be maintained to or slightly beyond 45 percent of the chord.

Note presenting a least-squares procedure adapted to numerical calculation for the approximate solution of the Prandtl lifting-line equation. Sufficient data are tabulated to permit a solution of the equation by purely numerical methods for an arbitrary symmetrical variation of the chord and the angle of attack.

Report presenting an investigation of the shape of stress-strain curve for a material, especially when the material is subjected to compression, which may cause materials to become unstable at stresses beyond the elastic range. The ratio of stresses to effective modulus is explored in equation form.

Note presenting an effective value of Poisson's ratio for 18:8 Cr-Ni steel computed from values of tensile and torsional moduli of elasticity obtianed in earlier investigations by use of an appropriate formula.

From Summary: "The various types of hydrodynamic instability - including porpoising, skipping, and yawing - that may be encountered during take-off or landing of a flying boat are described and the piloting technique required for efficient take-offs and landings is discussed. Suggestions are made for assisting a pilot to become familiar with the take-off and landing qualities of a flying boat that is new to him."

Report re-examining known procedures for handling general resistance testing on flying-boat hull models, with particular attention paid to saving test time and improving the usefulness of the results to designers. While specific testing will likely always be needed, the procedures given in the report for condensing resistance data should make data analysis easier to apply to design.

Report presenting wind-tunnel testing in two-dimensional flow to investigate the aerodynamic characteristics of a flap balanced by a large overhang linked to deflect more slowly than the flap. Three lengths of blunt-nose overhang were tested linked to a 0.30-airfoil-chord straight-contour flap on an NACA 66-009 airfoil. Results regarding lift, hinge moment, drag, pitching moment, and practical considerations are provided.

Report presenting measurements in the full-scale tunnel of the pressure distribution over the horizontal tail surface of a typical pursuit airplane in order to determine the effects of propeller operation and angle of yaw on the tail load distribution. Most of the tests were made with the propeller operating to simulate climb conditions, high-speed dives, and pull-ups to various normal accelerations for a range of angles of yaw. Results regarding chordwise pressure distributions, spanwise distributions of normal-force coefficient, airflow measurements, and tail-load asymmetry are provided.

"The relation between the elevator hinge-moment parameters and the control forces for changes in forward speed and in maneuvers is shown for several values of static stability and elevator mass balance" (p. 1). Factors affecting stability positively and negatively are presented and potential modifications to the elevator control system are provided. The amount of solid friction present was found to be one of the greatest predictors of instability.

Report presenting compression testing on several series of flat panels with Z-section stiffeners with varying relative dimensions. The data presented show the effect of dimension ratio on the buckling stress for the sheet and on average stress at maximum load.

Report discusses an investigation that was conducted to compare the strength and tightness of machine-countersunk flush-riveted joints assembled with NACA flush rivets and a type of commercial flush rivet. A comparison was also generated between the strength and tightness of counterpunched flush-riveted joints assembled with the same types of rivet. NACA's flush-riveted joints tended to be stronger and tighter than the commercial joints.

Report presenting testing made on a Wright 1820-G single-cylinder engine to determine the effect of operating variables and the effect of shape and size of the exhaust stack on the visibility of exhaust gases for individual-stack installations. Flame damping was improved by decrease in nozzle-exit area, increase in stack length, and reduction in hydraulic diameter of the exhaust jets. Results regarding the characteristics of exhaust flames and damping of exhaust flames are provided.

An analysis has been made of the drag losses in airplane flight of cross-flow plate and tubular intercoolers to determine the cooling-air weight flow and pressure drop that give a minimum drag loss for any given cooling effectiveness and, thus, a maximum power-plant net gain due to charge-air cooling. The drag losses considered in this analysis are those due to (1) the extra drag imposed on the airplane by the weight of the intercooler, its duct, and its supports and (2) the drag sustained by the cooling air in flowing through the intercooler and its duct. The investigation covers a range of conditions of altitude, airspeed, lift-drag ratio, supercharger-pressure ratio, and supercharger adiabatic efficiency. The optimum values of cooling air pressure drop and weight flow ratio are tabulated. Curves are presented to illustrate the results of the analysis.

The effect of internal cooling on the knock-limited performance of an-f-28 fuel was investigated in a CFR engine, and the following internal coolants were used: (1) water, (2), methyl alcohol-water mixture, (3) ammonia-methyl alcohol-water mixture, (4) monomethylamine-water mixture, (5) dimethylamine-water mixture, and (6) trimethylamine-water mixture. Tests were run at inlet-air temperatures of 150 degrees and 250 degrees F. to indicate the temperature sensitivity of the internal-coolant solutions.