Circular presenting a description of the light airplane SM-1, which was designed by W. S. Shackleton and Lee Murray. Information regarding the design and flight characteristics and some photographs of the airplane are provided.

Circular presenting a description of the Avro Trainer airplane, which is primarily intended for pilots in training and is designed to be easy to use, including large, comfortable cockpits, good view, effective windshields, and wide track. Details of the design, flight characteristics, drawings, and photographs are provided.

"A quantitative criterion of merit has been needed to assist airplane designers to incorporate satisfactory spinning characteristics into new designs. An approximate empirical criterion, based on the projected side area and the mass distribution of the airplane, has been formulated in a recent British report. In the present paper, the British results have been analyzed and applied to American designs. A simpler design criterion based solely on the type and the dimensions of the tail, has been developed: it is useful in a rapid estimation of whether a new design is likely to comply with the minimum requirements for safety in spinning" (p. 1).

Circular describing the Dewoitine D 33 commercial airplane, which is a low-wing cantilever monoplane. Details of the wing, fuel tanks, fuselage, landing gear, controls, engine, characteristics, drawings, and photographs are provided.

Circular presenting a description of the Baynes Bee, which is a light two-seat high-wing monoplane. Details of its unique qualities, design, components, flying qualities, drawings, and photographs are provided.

Circular presenting a description of the Bernard 82, which is a scaled-up version of the 80 G.R.; they have similar designs but the 82 has greater span and wing area, deeper chord, higher fuselage, and a thicker wing for the bombs. A description of some flight tests and characteristics is also provided.

Describes different types of southern pines, how to plant stock, and maintaining the trees as they continue to grow.

Report issued by the U.S. Bureau of Mines on the exploration of the Oklahoma City oil field for natural gas reserves. This report includes tables, maps, and illustrations.

Report issued by the U.S. Bureau of Mines on the different types of gases that are present in coal. Theories behind why these gases occur in coal are presented. This report includes tables and graphs.

Report issued by the U.S. Bureau of Mines on the improvements made on permissible electric mine lamps. The types of electric lamps approved for use, and their characteristics are presented. This report includes tables.

Report issued by the U.S. Bureau of Mines on the pegmatite deposits found near Tinton, South Dakota. The properties, and geology of the deposits are presented. This report includes tables, and maps.

Report issued by the U.S. Bureau of Mines on the coal mine related deaths that occurred during the month of May, 1931. The number of fatalities and their causes are presented. This report includes tables and graphs.

Report issued by the U.S. Bureau of Mines on the migration of gas injected into reservoir sands. The movements, speed, and direction of the gas are studied. This report includes tables, graphs, and illustrations.

Discusses the importance of a well-planned water system for the farm home. Describes methods for pumping, filtering, and storing water on the farm.

Describes measures, substances, and materials, both offensive and defensive, that have been found most effective against mosquitoes.

Explains the causes and describes methods for preventing red clover failure.

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; Is the El Paso School Board required to meet the requirements of the Building Code of the city of El Paso and obtain a permit from the City of El Paso for the purposes of constructing school buildings.

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; Is the appointment of an assistant to the County Auditor of Harris County legal, where the principal duty of the assistant is to give legal advice to the Auditor touching his official duties?

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; Construction of House Bill No. 557, 45th Legislature (Art. 1287-1, Vernon's Annotated Civil Statutes,) otherwise known as the Agricultural Protective Act, with respect to a proposed suit on behalf of a dealer against another dealer and dealer's surety.

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; Can a married man living in Baltimore, working for the government at Washington claim residence in Texas and vote there?

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; Effect upon superintendent's contract by the grouping of a common consolidated school district with others for rural high school purposes.

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; What bonds should the Independent School District issue to pay rent due obligations?

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; Disposition of certain fees collected under Article 3020, as amended by the 46th Legislature, S.B. No. 404.

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; Effect of paying taxes in Montagne County on land actually located in Cooke County.