Text describes action on various war fronts: Japs advance to Lashio -- Allies raid Lae -- Japs attack in China -- Malta sends greetings -- Hitler in Detroit from Moscow -- Yanks in New Caledonia -- Gen. George killed -- Fourth registration -- President calls nation to new sacrifice -- Price control fixed -- Rescued crew hits sub -- U.S. movies bootlegged -- Home worries Hitler -- Eastern seaboard put under Army safeguard -- RAF 'second front' opens -- Malta stiffens fight -- Greek guerillas active -- Red commandos strike Large world map is keyed to text and illustrates time zones around the world. Inset map shows areas of heaviest rainfall around the Bay of Bengal. Photographs: Fortresses roamed from Australia -- Maj. Gen. Patch Jr. -- Brig. Gen. Harold H. George -- Ways will be found to deliver the planes -- The gun crew got the range -- Lt. Gen. Drum -- Germans reported Red armoured trains -- Training of U.S. Army glider pilots.

Text describes action on various war fronts: Navy announces victory -- End for Corregidor -- Rationing moves closer -- Japs push into China -- Marblehead limps in -- Stark for new fronts -- Iceland has its first air fight -- Army of 6,000,000 -- Launch four destroyers -- Anti-Axis move in Spain -- Army camps inspected -- Germans strike convoy -- Malta downs 154 planes -- Madagascar tip seized -- U.S. aids Middle East -- Nazi drive predicted -- RAF attacks roar on. Large world map is keyed to text and illustrates time zones around the world. Inset maps: Corregidor -- Madagascar. Includes photographs: Lt. Gen. Wainwright -- Maj. Gen. Brereton -- Navy raid on Marshall Islands in February -- Under Sec. Patterson -- Kearney destroyer -- Bombs being readied for planes -- Four-engined bomber flying somewhere in Europe -- Cavalry regiment changes mounts to speedy steel.

Text describes action on various war fronts: Jap advance lines cut -- U.S. bombers in India -- Jap defeat in China -- Tribute to team work -- Tokyo raid confirmed -- Axis attack forecast -- Subs in St. Lawrence -- Plan relief corps -- WAAC bill passes -- State laws 'brake' war -- Deal at Martinique -- Raid Jap settlements -- Peru's president here -- Freight by plane -- Gas rationing starts -- Indies fliers here -- British announce war casualties -- R.A.F. pushes attacks -- Gort to Malta command -- Mission to Africa -- Spring offensive on -- Norway plant wrecked. Large world map is keyed to text and illustrates time zones around the world. Inset map shows German and Russian advances near the Black Sea. Includes photographs: Lt. Gen. Stillwell -- Vice Pres. Wallace -- Lt. Gen. Somervell -- New bombs piled underground awaiting delivery -- Lord Gort -- Russian troop answer the Nazi assault -- British troops practice street fighting tactics. Includes 1 cartoon.

Front : Text describes action on various war fronts: Axis hunts Shangri La -- Shadow on Australia -- New threat to China -- Gandhi still passive -- More Yanks in Ireland -- U.S. gets Panama bases -- Spain would trade -- Island volcano erupts -- Axis people grumble -- Axis battles Chetniks -- Air travel curtailed -- Prinz Eugen torpedoes -- Attack on Kharkov -- Vichy downs RAF planes -- Africa drive hinted -- Malta counts bombings. Large world map is keyed to text and illustrates time zones around the world. Inset maps show the Burma Road and a map of a portion of Europe overlaying a map of the United States. U.S. cities are shown in italics, European cities in capitals. Includes photographs: Doolittle did much -- North American B-25 -- Gandhi opposes [scorched earth policy] -- School of 'tin fish' ready for their deadly work -- Shell casings stacked in Moscow factory -- Rommel might move -- Catalinas from America keep an eye on the Mediterranean -- RAF salvages wrecked planes from desert. Includes 1 cartoon. Back: Know Your Enemies: the Nazi Army. Includes photographs: Supporting Fire, Howitzer in Action, Moving Up, Mountain Troops, Tank Destroyer, Anti-Aircraft Alert, …

Describes varieties of the winter legumes used for "green manure" in the southern United States; provides suggestions for considerations to make when using winter legumes on farmland.

Describes a series of scientific tests conducted over ten years to identify the strains of corn that were resistant to the threat of European corn borers, and provides the results of these tests.

Discusses the important role shade trees play in camouflaging property. Explains the ways in which shade trees can become damaged and provides advice for repairing them in the event of damage.

Describes types of sugar beets, procedures for growing them, and possible threats to them.

Contains instructions for inspection, assembly, disassembly, maintenance, and repair of plotting boards for field artillery.

Discusses maintenance and repair of the component parts of aircraft radio equipment, and the correct use of tools.

The available sources of data on the mechanical properties of aluminum alloys at low temperatures are listed and a summary of the material to be found in each source is given. There is included a discussion of the results of recent tests of aluminum alloys at low temperatures made at the Aluminum Research Laboratories.

"The solution of von Karman's fundamental equations for large deflections of plates is presented for the case of a simply supported rectangular plate under combined edge compression and lateral loading. Numerical solutions are given for square plates and for rectangular plates with a width-span ratio of 3:1. The effective widths under edge compression are compared with effective widths according to von Karman, Bengston, Marguerre, and Cox and with experimental results by Ramberg, McPherson, and Levy" (p. 1).

Porpoising characteristics were observed on V-body fitted with tail surfaces for different combinations of load, speed, moment of inertia, location of pivot, elevator setting, and tail area. A critical trim was found which was unaltered by elevator setting or tail area. Critical trim was lowered by moving pivot either forward or down or increasing radius or gyration. Increase in mass and moment of inertia increased amplitude of oscillations. Complete results are tabulated and shown graphically.

Report presenting flight tests made with a modified Ryan ST airplane to determine the effect on aileron characteristics of various arrangements of balanced split flaps covering that portion of the wing span occupied by the ailerons. With the flaps fully extended, the aileron effectiveness was reduced by approximately 18 percent of the effectiveness measured with ailerons alone.

Report presenting testing of a representative bomber nacelle on a low-drag wing in the NACA two-dimensional tunnel. The adverse or interference effects of the nacelle on the low-drag wing were small.

Report presenting testing in the high-speed wind tunnel to determine the drag characteristics of several types of radial-engine nacelle on a low-drag airfoil. The drag coefficients of nacelles incorporating cowling-nose shapes shown by previous tests to be efficient and afterbodies of adequate length were about the same magnitude as commonly obtained for comparable installations on conventional wings. Results regarding the reduction of data, effect of nacelles on lift, and pressures at wing-nacelle juncture are provided.

Report presenting tests of a three-barrel pressure carburetor to determine the effect of nonuniformity of the air flow in the intake duct on the metering of the carburetor. Measurements were made in the air side of the metering system and in the carburetor barrels for a variety of flow distributions. Results regarding the metering pressure, altitude compensation, effect of throttle on the metering characteristics, and flow of air around the bends are provided

"A new method is presented for obtaining the velocity potential of the flow about a body of revolution moving uniformly in the direction of its axis of symmetry in a fluid otherwise at rest. This method is based essentially on the fact that the form of the differential equation for the velocity potential is invariant with regard to conformal transformation of the meridian plane. By means of the conformal transformation of the meridian profile into a circle a system of orthogonal curvilinear coordinates is obtained, the main feature of which is that one of the coordinate lines is the meridian profile itself" (p. 7).

"A graphical method is described for finding the shape (camber and twist) of an airfoil having an arbitrary distribution of lift. The method consists in replacing the lifting surface and its wake with an equivalent arrangement of vortices and in finding the associated vertical velocities. By division of the vortex pattern into circular strips concentric about the downwash point instead of into the usual rectangular strips, the lifting surface is reduced for each downwash point to an equivalent loaded line for which the induced velocity is readily computed" (p. 543).

Report presenting a study of the performance of bombers powered by four 2000-horsepower engines supercharged to 25,000 feet. A series of charts is provided with the coordinates of power loading and wing loading in order to simplify the selection of the best airplane for a given purpose.

Report presenting flight-test data contributing to the development of the present SBD-1 flying qualities based on the interest expressed in the methods used to obtain control-force characteristics on the Douglas Model SBD-1 by minor relocation of control-surface hinge line in combination with modifications in the aerodynamic balance nose shape. Results regarding the stalling characteristics, lateral-directional stability and control, longitudinal stability and control, and design recommendations are provided.

Report presenting a flight investigation to check the results of a theoretical analysis of longitudinal stability of an airplane with free controls. Tests used a Fairchild XR2K-1 airplane on which the weight moment and the aerodynamic balance of the elevator were varied to bring it into a condition where unstable short-period oscillations were encountered.

Report presenting tests in the two-dimensional low-turbulence pressure tunnel of a model of the NACA 66,2-116, a = 0.6 airfoil section representing the root section of the wing for the XP-63 airplane. The model was of 24-inch chord, built of wood with dural slot cover plates for the flap.

"A rain-repellent lacquer was submitted to the National Advisory Committee for Aeronautics by Captain K.H. Kalberer, of Lorr Laboratories, and preliminary tests and observations have been made to determine its value in improving the vision through an airplane windshield during rain. The tests and observations were carried out at Ames Aeronautical Laboratory, Moffett Field, California, over a period of about a week. The results are reported herein" (p. 2).