Report presenting the transonic drag characteristics of a series of wing-body combinations and their component parts using the free-fall method. The configurations examined had wings of various sweeps and thickness ratios mounted on identical bodies of fineness ratio 12.

"Data obtained from an extensive investigation of the cooling characteristics of four multicylinder, liquid-cooled engines have been analyzed and a correlation of both the cylinder-head temperatures and the coolant heat rejections with the primary engine and coolant variables was obtained. The method of correlation was previously developed by the NACA from an analysis of the cooling processes involved in a liquid-cooled-engine cylinder and is based on the theory of nonboiling, forced-convection heat transfer. The data correlated included engine power outputs from 275 to 1860 brake horsepower; coolant flows from 50 to 320 gallons per minute; coolants varying in composition from 100 percent water to 97 percent ethylene glycol and 3 percent water; and ranges of engine speed, manifold pressure, carburetor-air temperature, fuel-air ratio, exhaust-gas pressure, ignition timing, and coolant temperature" (p. 207).

Report presenting the tumbling characteristics of dynamic models of 14 airplane designs in the free-spinning tunnel for various loadings and configurations. Conventional airplanes were not found to tumble, but tailless and tail-first airplanes might depending on the amount of static longitudinal stability. Results regarding the effect of dimensional and mass characteristics, effect of controls, use of parachutes as a tumble-recovery device, accelerations, and possibility of pilot escape are provided.

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, Price Daniel, regarding a legal question submitted for clarification: The authority of the Tax Assessor-Collector of Mitchell County to issue a full tax receipt upon payment of the county's share of the proceeds of the sale of land deeded to a school district in payment of delinquent taxes.

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, Price Daniel, regarding a legal question submitted for clarification: Whether a Railroad Company should include the roadbed which it holds by lease in the sworn statement of rolling stock and mileage required to be filed by Art. 7169, V.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, Price Daniel, regarding a legal question submitted for clarification: Effect of school consolidation election held under Article 2806, V.C.S., as amended, where one or more districts vote against proposition.

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, Price Daniel, regarding a legal question submitted for clarification: The validity of a Commissioners' Court order that all road employees shall be hired and all road materials shall be purchased by the Court, acting through the County Judge, rather than by individual county commissioners.

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, Price Daniel, regarding a legal question submitted for clarification: Qualification of voters; duties of and advice to election officers.

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, Price Daniel, regarding a legal question submitted for clarification: Construction of the appropriation for establishing the Weaver H. Baker Memorial Tuberculosis Sanatorium and the appropriation for the support and maintenance thereof for the current fiscal year.

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, Price Daniel, regarding a legal question submitted for clarification: Whether a white applicant may be admitted to The Texas State University for Negroes.

Solubilities -- Orban: The solubility of postum in various concentrations of nitric acid was determined at 25.4{degrees}C. Hydrofluoric and Trifluoroacetic Acids -- Abel and Raiff: Details of this work will be reported in the next Progress Report. Conversion of Nitric Acid Solutions to Hydrofluoric Acid Solutions -- Bell: Conversion of production solutions to hydrofluoric acid solutions was tried by precipitation with ammonium oxalate, aluminum hydroxide, ammonium hydroxide, and sodium carbonate. Silver and Teflon discs were used.

The high rate neutron scaler has been removed from service for repair. Consequent study has led to the discovery of a double counting effect. The vacuum system of the vacuum balance is being redesigned and rebuilt so as to obtain a higher vacuum. The vapor pressure of postum was measured with a quartz sickle gauge between 0.3 and 90 mm. of mercury pressure at temperatures between 430{degrees} and 745{degrees}C. The least square representation of the data is the following: Log p = {sub T}{und 5377.8} + 7.2345 where p is the pressure in mm. of mercury and T is the absolute temperature. From this least square equation the extrapolated boiling point is 962.1{degrees}1{degrees}C. and the latent heat of vaporization is 24,597 calories per mole. A single crystal study of potassium chloride is being made since it is the crystal which is most nearly like a simple cubic lattice. The Geiger counter X-ray spectrometer belonging to Unit I was set up and a recorder attached so that certain patterns could be obtained more quickly. Continuation of the effusion experiment showed that data obtained were violently Inconsistent. The experimental work Is being dropped. At the end of the Physics Group Progress Report …

Progress is reported on the following projects: Quartz-fiber microbalance research, quartz-fiber construction and maintenance, design of multiple stirrer plating unit, and design of rotating stage for foil photography.

Studies on the conversion of production nitric acid solutions to bismuth free postum (Polonium 210) solutions and the plating of postum from the hydrofluoric acid solution.

Equipment and supplies are being packed for moving to Mound Laboratory. Work was started on the development of a cathode-follower circuit to match a B-wall tube to its connecting cable. The final report and maintenance manual for the scaler-multiplier are almost finished. The 10 millivolt Speedomax recorder used by Group 3 in the study of electrodeposition potentials has been replaced with a 150 millivolt Speedomax, utilizing two recording points for simultaneous recording of radioactive deposition and the plating cell current. Three two-input B-wall mixers, three scaler-multipliers, one four-input Geiger-Mueller mixer and five Thyratron heater controls were delivered to Group 24. One high-current plating control, EL-173, was delivered to Group 17. The following instruments are complete: portable pulse generator, EL-261, the instruction book and photographs will be submitted for approval at an early date. Portable regulation checker, EL-258. Preliminary tests have been made, instructions are being written and drawings are being made.

This monthly report provides brief progress descriptions of a number of projects being conducted at Mound Laboratory. Projects include sensitivity of the scaler used for neutron counting, purity of postum (Polonium 210), vapor pressure of postum, resistivity of postum, vapor pressure of selenium,and x-ray diffraction studies to determine the coefficients of expansion for aluminum, copper, lead,and gold.

The Process group reports that material processing is on schedule and that process laboratories 2 and 3 are being overhauled. The Electrodeposition group reports that they are on schedule but that they are somewhat handicapped due to a lack of coveralls. Administration reports that Site W schedules have been prepared.

This monthly progress report describes efforts to prepare neutron sources with postum (Polonium 210) and either beryllium, boron or lithium by volatilization and by electrochemical deposition.

This document presents details about health concerns resulting from the activities of the Mound Laboratory during the month of August 1948.

Preparation and analytical chemistry of postum (Polonium 210) dibromide and tetrabromide by bromination of metallic postum are described.

Three studies are described: diffusion of postum (Polonium 210), measurement of standard potential of postum, and polarography with the cathode controller.

Two difficulties which have been encountered in the attempts to prepare hydrofluoric acid solutions by precipitation and resolution are (1) dissolution of postum out of the solid precipitate leaving behind a solid bismuth compound and (2) the plastics used for a reaction vessel. Plastics tried have not held up under the combined effects of hydrofluoric acid, moderate heat, and alpha bombardment and the overall yield of the method is rather low. The plastics problem may be solved by the use of ``Fluorothene`` which is on order from the Atomic Energy Commission and should arrive soon. The problem of leaching the postum from the precipitate may be solved by careful control of pH during precipitation procedure to avoid the precipitation of as much bismuth as possible.

This report presents the details of the activities of the Mound Laboratory health sciences group during the month of July 1948.

This study seeks to determine the decomposition of bismuth trioxide by polarography. Results gained confirmed that at decomposition potentials observed that bismuth will not be reduced under normal plating conditions observed during production.