Report issued by the U.S. Bureau of Mines on the safety measures used in keeping mining equipment grounded. Methods and instrumentation used in testing grounding equipment are presented. This report includes tables, and illustrations.

Front: Text describes action on various war fronts: USSR, Southwest Pacific, Italy, Air offensive, Yugoslavia. Maps: Eastern front; Netherlands Indies; Southwest New Britain. Photographs: French troops of 2nd Moroccan Division fight in Italy; Half-track loaded with Frenchmen crosses the Volturno; French First Armored Division during maneuvers; B-25 Mitchell bomber; 75mm shell for the cannon on the Mitchell bomber; Japanese destroyer after being hit by shells from the Mitchell bomber; Gen. Bernard Montgomery commander of the British Eighth Army explains battle strategy to Soviet generals: Maj. Gen. Vasiliev and Maj. Gen. Solodvnik. Back: Map showing Japanese controlled areas. Inset maps illustrate Japanese territorial acquisitions over time. Includes "Text of the general statement issued after the Cairo conference attended by President Roosevelt, Generalissimo Chiang Kai-shek and Prime Minister Churchill, together with their respective military and diplomatic advisers."

Text describes action on various war fronts: Italy, USSR, Germany, Central Pacific, Southwest Pacific, China, Plans. Inset maps: central Italy, northeast New Guinea, Action areas in central and southwest Pacific, Truk Is., Nauru, Wotje, Jaluit, Makin, Tarawa. Photographs: Australian Air Force Beaufighter, Sgt. Ben Kuroki of Hershey, Nebraska, Captured Soviet equipment, Rescued blindfolded Nazi. German built road in Isernia. Back: Text and 11 illustrations highlight the 11 general orders that must be known by sentinels.

Front: Text describes action on various war fronts: Southwest Pacific, Central Pacific, China, USSR, Italy, Air offensive, Submarines. Inset maps: Southeast Europe, Central China battle area. Photographs: U.S. Army engineers replace a bridge in Italy, Antiaircraft fire from a U.S. carrier, Brazilian ground and air troops, Turkish officials, "Rome or Death." Back: Text and photographs illustrate the battle for the Gilbert Islands.

Front: Text describes action on various war fronts: Italy, U.S.S.R., air offensive, Marshal Is[lands], southwest Pacific, [Teheran] conference. Map shows Nazi-dominated areas of Europe. Photographs: Marshal Stalin, President Roosevelt, and Prime Minister Churchill at Teheran conference (4 photographs); The Air Offensive - 8th Air Force bombes en route - Target Bremen. Back: A sign of comradeship... Includes illustration and "Li'l Abner" cartoons.

Outlines the scope of the examination for gunners, to be taken by U.S. Army personnel, U.S. Military Academy cadets, members of R.O.T.C. units, and C.M.T.C. trainees.

Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Gerald Mann, regarding a legal question submitted for clarification: Transfer by contract or entire scholastic enrollment, under Article 8, House Bill 284, 47th Legislature - - effect on boundaries of receiving district.

Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Grover Sellers, regarding a legal question submitted for clarification: Whether the order of the Commissioners' Court quoted herein established the "neighborhood" road as a public road under the laws of this State.

Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Grover Sellers, regarding a legal question submitted for clarification: Sufficiency of notice of sheriff's sale under provisions of Article 7345b(9) V.A.C.S.

Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Grover Sellers, regarding a legal question submitted for clarification: Salaries of deputy sheriffs in Lamar County.

Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Grover Sellers, regarding a legal question submitted for clarification: Should 1943 taxes be assessed on certain property which was owned by the Farm Security Administration until August, 1943, at which time it was deeded to individuals? If so, should assessment be for the full year, or that portion of the year after the date of the deed?

This report details activities of Hanford Engineer Works on Project 9536 during the week ending December, 1943. Tests are described which were run to determine means of eliminating the film which has been forming on tubes and slugs and causing excessive pressure drops.

Report presenting force-test measurements in two-dimensional flow made in the 4- by 6-foot vertical tunnel to determine the aerodynamic characteristics of an NACA 66(215)-014 airfoil equipped with true-contour, straight-contour, and beveled-trailing-edge flaps with chords 30 percent of the airfoil chord. The results are presented in the form of aerodynamic section characteristics for several flap deflections and for a sealed and unsealed gap at the flap nose.

Report discusses the results of testing of flap position and deflection on the aerodynamic characteristics of a NACA 23012 airfoil with a double slotted flap with a chord 30 percent of the airfoil chord. The maximum lift coefficient, profile-drag coefficients, pitching-moment coefficients, lift, and drag are provided at several positions of the flap. The results were also compared to previous testing on several flap configurations.

Report presenting hinge-moment parameters for several typical ailerons, which were calculated from section data with the aspect-ratio correlation as usually determined from lifting-line theory. The calculations showed that the agreement between experimental and calculated results was unsatisfactory.

Report discusses the results of testing on several models of flying boats, the XPB2M-1, the XPBB-1, the JRM-1, and 11 other models to determine the effect of bow form on the amount of spray thrown onto the windshield of a flying boat in rough water. Several recommendations for reducing the height and volume of spray are provided. Any change in the hull form that softens the impact between the hull and waves seems to reduce the spray.

Report presenting flight testing using a North American XP-51 airplane with several arrangements of beveled-trailing-edge ailerons to determine the most satisfactory arrangement. Results regarding the aileron configuration, trimming tabs, and factors affecting symmetry of aileron characteristics are provided.

Report presenting lift and hinge-moment characteristics of various types of airplane control surface. The data can be used to determine curves correlating the results of many tests of the various types of aerodynamic balance.

Several tail modifications of the Brewster XSBA-1 scout-bomber were investigated and results compared. Modifications consisted of variation of the chord of the elevator and rudder while the total area of the surfaces is kept constant and variations of the total area of the vertical tail surface. Configuration number 2 reduced trim changes by 50 percent and reduced average elevator control force gradient from 30 to 27 pounds/g. Stick travel required to stall in maneuver was 4.6 inches.

Report presenting the propeller forces due to an angular velocity of pitch, which are analyzed and shown to be very small for the pitching velocities that may actually be realized in maneuvers, with the exception of the spin. A dual-rotating propeller in yaw was found to develop up to one-third more side force than a single-rotating propeller.

Report discusses a proposal for propeller manufacturers to consider the side-force factor with the activity factor as a fundamental parameter for all blade designs and for the side-force factor to be included in all reports of powered models in wind tunnels. The proposal includes a method for calculating the side-force factor and how it can be used in propeller development. It is shown to be a good index of the relative effectiveness per blade of a yawed propeller in developing side force.

Note presenting a theory that is meant to include all factors that are commonly present when determining the stability of isotropic or orthotropic cylinders or flat or curved panels under a variety of characteristics. The theory is based on the energy method and involves a number of approximations, some rather rough. It is a theory of elastic stability and, like other theories, assumes a construction with no imperfections of shape or elasticity.

Note presenting tensile and compressive stress-strain curves, stress-deviation curves, and secant modulus-stress curves for longitudinal and transverse specimens of magnesium alloy J-1 sheets 0.032 and 0.102 inch thick. Significant differences were found between the tensile and compressive stress-strain curves and between the compressive stress-strain curves for the longitudinal and transverse questions.

Report presenting an investigation of the effect of various surface finishes on the endurance of normalized X4130 and 4140 steels and 25S-T aluminum alloy. All mechanically formed surfaces tested were stronger than electropolished surfaces.