Report presenting a description of the autogiro, which is a flying machine built and designed in Spain. A history of the device and the reasons why it is safer and more stable than a typical aircraft are provided.

Report discussing "the extent and nature of the hazards to firefighters from gases and smoke resulting from the application of carbon tetrachloride extinguisher to electric arcs, burning insulation or fires such as may occur in electrical apparatus and machinery. The experiments described were made for the purpose of determining the nature of gases and smoke and ascertaining their toxic properties" (p. 1).

Describes the characteristics of carpet beetles and methods for their control.

Describes different types of clothes moths, the damage they can cause to textiles in the home, and methods for control.

The connections between the cockpit and the control surfaces are examined. An examination of the pros and cons of using stick control, the problems of control in giant aircraft, an effort to find a substitute for these controls, and a proposed concept for mechanically operated gear are provided.

The development of more efficient control surfaces requiring less force to operate are presented. Some of the control surfaces explored include the De Havilland gear, Flettner rudder, and some other possible control methods.

Describes the characteristics of the gypsy moth and browntail moth, the damage they cause, and methods of control.

Describes symptoms, treatments, and prevention methods for numerous diseases and parasites afflicting poultry.

Discussed here is the suggested installation of the 'unbalanced' 8-cylinder VE-engine. The suggestion was that a flexible mounting be used instead of bolting the engine rigidly to the airplane structure. It was concluded that a flexible connection between the engine and the airplane is probably possible. A flexible connection primarily diminishes the vibrations due to inertia and, to a lesser degree, those due to torque variation. However, engines vibrate more when freely suspended than when rigidly mounted, and this vibration has a detrimental effect on all connections between the engine and the airplane. Therefore, in view of the relatively insignificant advantages which may be derived from the elastic suspension of the engine, the present rigid mounting is to be preferred. Vibration reduction can be achieved by incorporating in the fuselage as many of the rigid airplane parts as possible.

Describes methods for fumigating citrus trees in order to control scale insects and other pests.

Note presenting an investigation undertaken to answer the question of what cycle of heat phases should be selected for small high speed engines running on solid or airless injection with compression ignition, and what the relative proportions of the heat phases should be.

A consumer guide to buying, storing, and using milk.

Emphasized here is the desirability of using recording instruments in the investigation of the characteristics of airplanes with particular reference to the National Advisory Committee for Aeronautics (NACA) control force recorder. Given here are photographs, records, and a description of the instrument developed by NACA for investigations on different types of aircraft. Described here is an instrument for recording control forces.

Describes the characteristics of Polish and poulard wheats, which because of their size and appearance are often sold under false claims. Warns U.S. farmers against growing them because they produce low yields and are of little commercial value in the U.S.

"The various speeds of an airplane can only be measured in horizontal flight, since there are no means for measuring the angle of ascent or descent. The measurements must be corrected for the density of the air. This is obtained by simultaneous pressure and temperature measurements during flight" (p. 1).

Describes several different types of the American class of chicken breeds.

Describes the characteristics of the strawberry root-worm, the damage it causes to roses, and methods of control.

Technical paper issued by the Bureau of Mines over tests conducted at the powdered-coal plant in Rivermines, Missouri. The results of boiler tests, dryer tests, and mill tests are discussed. This report includes tables, and illustrations.

Report issued by the U.S. Bureau of Mines on the possibilities of applying oxygenated air during metallurgical and allied processes. The methods and results of applying oxygenated air to these processes are presented. This report includes tables and graphs.

The advantages of variable pitch propellers over constant pitch propellers is presented along with different methods of varying the pitch. The technique of varying the shape of the propeller is presented as the most efficient one.