Discusses the need for large cotton crops in 1952 and requirements for achieving the highest possible yields. Includes an outlook for resources such as fertilizer, pesticides, defoliants, machinery, and manpower.

Describes the versatility of the soybean as a crop, including its use for pasturage, animal feed, hay and straw, soil improvement, industrial purposes, as oil, as fertilizer or insecticide, as a honey crop, and for human food products. Includes instructions for growing and processing soybeans. Also includes instructions for preparing soy milk and soy curd (tofu).

Describes systematic processes for inspecting and judging sheep.

An explanation of corn grade requirements. Factors include insects, odors, moisture, weight-per-bushel, cleanliness, damaged kernels, and color.

"An investigation of the rolling effectiveness of spoiler and aileron aerodynamic controls on a fighter-type airplane has been conducted at Mach numbers from 0.6 to 1.5 by the Langley Pilotless Aircraft Research Division by utilizing rocket-propelled test vehicles. No effects of mutual interference between the midspan spoiler and the outboard aileron were detectable. Above the speed of sound, the ailerons were relatively ineffective as compared with the spoiler because of wing twisting" (p. 1).

Memorandum presenting the tail-pipe fuel ratio, mass flow of combustion gas, and radial fuel flow distribution on cooling requirements of tail-pipe burner with annular cooling-air passage.

Report presenting an investigation of the altitude performance of a 28-inch diameter ram-jet engine using a direct-connect system in an altitude test chamber. The majority of the investigation occurred at Mach number 2 at altitudes above the tropopause (250 degrees Fahrenheit inlet temperature). Various design configurations were explored and runs were made with different types of fuel.

"An investigation was conducted in the NACA Lewis icing research tunnel to determine the characteristics and requirements of cyclic deicing of a 65,2-216 airfoil by use of an external electric heater. The present investigation was limited to an airspeed of 175 miles per hour. Data are presented to show the effects of variations in heat-on and heat-off periods, ambient air temperature, liquid-water content, angle of attack, and. heating distribution on the requirements for cyclic deicing" (p. 1).

From Summary: "A photographic technique for investigating water droplets of diameter less than 200 microns falling freely in air at temperatures between 0 C and -50 C has been devised and used to determine: (1) The shape of frozen droplets, (2) The occurrence of collisions of partly frozen or of frozen and liquid droplets, and (3) The statistics on the freezing temperatures of individual free-falling droplets."

Report presenting an investigation at Mach number 1.91 to determine the gross spreading characteristics of jets expanding from convergent and convergent-divergent nozzles using total-temperature surveys. Results regarding the preliminary development and jet spreading characteristics of the different types of nozzles are provided.

"An investigation to determine the structural damping characteristics of a full-scale airplane wing was conducted by the shock-excitation method wherein the wing was loaded to a predetermined deflection and the load suddenly released. The test specimen vibrated at its fundamental bending frequency of 1.69 cycles per second. Only the first 2 or 3 cycles showed any indication of a higher frequency being superimposed upon the fundamental bending frequency. The damping was found to increase from about 0.002 to critical at an amplitude of vibration of plus and minus 0.05 inch to approximately 0.006 of critical at an amplitude of + or - 5 inches" (p. 1).

"A coincidence Geiger counter system was constructed for the absolute measurement of the activity of radioactive substances made in a cyclotron. The average beam current in the cyclotron can be calculated from the number of disintegrations per second observed, the half-life of the radioactive substance, and the reaction cross section" (p. 1).

Report presenting the use of molybdenum disulfide as a solid film lubricant in applications where designs or temperatures preclude liquid lubricants is dependent on successful bonding of the powder to the surface to be lubricated. An investigation was conducted to determine the basic mechanism of bonding and to extend application of the bonding to a variety of materials. Results regarding an examination of electron diffraction of MoS2 dusted and rubbed on steel, adherence of dry powders to metals, chemical action in bonding mechanism, other resin-forming liquid vehicles, bonding of MoS2 and other powders to various materials, and analysis of solid film by electron diffraction are provided.

Note presenting tests to determine local heat-transfer coefficients and friction factors for fully developed turbulent flow of air in a smooth electrically heated tube with an inside diameter of 0.87 inch and a length of 87 inches. Testing occurred at high ratios of wall to fluid bulk temperatures. Results regarding the predicted temperature and velocity distributions, Nusslet numbers, friction factors, velocity distributions, and temperature distributions are provided.

Note presenting a survey of the chromium-cobalt-nickel ternary phase diagram at 1200 degrees Celsius by means of microscopic and X-ray diffraction studies on 110 vacuum-melted alloys prepared from commercial metals of the highest purity available. Three distinct phases are noted.

Note presenting a discussion of a semiempirical profile correction factor which enables the estimation of the wave drag due to thickness at supersonic speeds for three-dimensional wings with arbitrary airfoil section through use of previously calculated drag coefficients. Application of the correction factor to the known drag coefficients of some rhombic-profile wings yielded estimates for the drag coefficients of parabolic-arc-profile wings that were in good agreement with theoretically calculated values.

"An isothermal survey was made of certain portions of the chromium-cobalt-nickel-iron quaternary system at 1200 degrees Celsius. The iron content was varied up to 30 percent to include the range of commercial chromium-cobalt-nickel alloys. As a part of the quaternary system, the cobalt-chromium-iron ternary system was also studied" (p. 1).

Note presenting the principle of complementary energy in the nonlinear elasticity theory, which is shown to be derivable from the principle of potential energy by a Legendre type of transformation. The expression of the complementary energy is derived for homogeneous and sandwich plates and shells with large deflections. The stress-strain relations are derived for homogeneous shells, sandwich plates, and sandwich shells.

Report presenting a study in which heavy hydrogen (deuterium) was substituted in turn for regular hydrogen in each of five possible hydrogen-producing operations in the coating process. The gas that evolved when coated steel specimens fishscaled after firing was collected and analyzed with the mass spectrometer.

Note solving basic equations of Karman and Chien by representing the shape of a torsion box by means of a Fourier series. The coefficients of the series are determined by conventional methods. Results obtained for angles of twist and normal stresses are in good agreement with results of Karman and Chien except at sharp corners.

Report presenting normal accelerations and airspeed data collected with NACA V-G recorders in transport airplane operations from 1933 to 1945, which are summarized and analyzed with respect to gusts and gust loads. The accelerations experienced in most operations equaled or exceeded the limit-gust-load-factor increment, on average, twice in 107 flight miles. Results regarding the acceleration experience, gust experience, probable airspeed, and maximum airspeed are provided.

Note presenting bending-moment distributions that were measured on a model helicopter rotor blade under hovering and simulated forward-flight conditions. curves of maximum-bending-moment distribution are presented for all test conditions. Resonance studies have also been made on three sets of blades of different stiffnesses for the purpose of comparing the experimentally determined resonance peaks with those indicated by theory.

Report presenting a solution of the Navier-Stokes equation for source and sink flows of a viscous, heat-conducting, compressible fluid for the case of constant total flow energy.

From Introduction: "The problem of free-convection flow as produced by a body force about a flat plate in the direction of the body force was studied at the NACA Lewis laboratory and is treated in a formal and more general manner herein. The method used is somewhat similar to that used in reference 4 wherein consideration was given to the free-convection flow at high Grashof numbers in a horizontal cylinder which had a variable surface-temperature distribution. In addition, the numerical solutions of references 2 and 3 are herein extended to cover a more complete range of variables."