Report issued by the U.S. Bureau of Mines on a survey of the New Albany oil-shale deposits in Indiana. The experimental procedures for surveying and sampling these shale deposits are presented in detail. This report includes tables, and graphs.

Suggests ways to prepare lamb and mutton for the table and of combining them with other ingredients of suitable flavor.

A guide to home canning. Includes instructions for canning a variety of fruits and fruit juices, vegetables and soups, and meats and meat dishes.

Describes methods for the use of arsenate of lead to control the tobacco hornworm and prevent damage to crops.

Memorandum presenting the rules and regulations of the Fokker Soaring Flight Contest, which occurred over the water and over level land.

The aim of this article is to present, in broad outline, a scientific method for solving the problem, "Wood or Metal." It will be shown that structural methods have by no means reached their final perfection. The strength of the different materials is discussed as well as different construction methods.

The causes of error in experiments conducted in wind tunnel tests are given and the value of in-flight tests are promoted. The four main causes explored include neglect of the laws of dynamic similitude, interference between the support and the model, nature of the air stream, and the influence of the walls of the tunnel.

The "Turkey Buzzard" is a semi-internally braced monoplane (Fig. 1). The wing is placed above the fuselage for two important aerodynamical reasons: first, because this position minimizes the mutual interference between the wing and the fuselage, and, second, useful lifting surface is utilized with the wing passing over the fuselage instead of through it.

The Schneebeli silencer is made entirely of soft sheet steel. It is connected with the engine for receiving the exhaust gases, and consists of two parts: the silencer proper and a conical exit. The Birger silencer, made by the Ad Astra Company in Switzerland, is based on the principle of rapid cooling of the exhaust gases.

Economic and safety factors are discussed in relation to a switch from hydrogen to helium in airships.

Two methods to replace the weight of gas lost on long airship flights are discussed: condensing the water of combustion and thermic sustentation. In the present article we will discuss the first method, leaving the second to be examined in a subsequent article.

Report issued by the Bureau of Mines over the importance of timbering in metal mines. The reasons and methods for timbering are presented and discussed. This report includes illustrations, and photographs.

The aim of this article is to present, in broad outline, a scientific method for solving the problem, "Wood or Metal." It will be shown that structural methods have by no means reached their final perfection. The strength of the different materials is discussed as well as different construction methods.

The control of an airplane is discussed beginning with sideways motion and following up with control by weight shifting and by swinging wing tips.

Report presenting an example of a heavily staggered biplane with a single rigid outer strut in order to help determine the influence of the initial tensions in the wing bracing on the stressing of airplane parts.

"Recent data have shown that certain forms or types of ailerons that are in extensive use are in reality quite inefficient and entirely unsuited for the high speeds now realized. The same data indicate that two forms (both shown here) are efficient and satisfactory in every way. The most important characteristics of ailerons are effectiveness under all flight conditions, small moments about the hinge, high efficiency (small yawing moment opposing turn), and simplicity in construction. Information required for the design of ailerons is given for chord, span, area, and plan form" (p. 1).

Note presenting a number of instruments that can assist pilots with observing the position of the airplane. Some of the instruments include an inclinometer with stationary system of reference and an inclinometer with moving axes.

Note presenting a study of the improvement of the performance of airfoils by abrupt changes in contour.

Report providing information about the most appropriate kinds of breathing apparatus -- gas masks, hose masks, or self-contained oxygen-breathing apparatus -- to use in different situations.

Describes the characteristics of the boll weevil, the damage it causes to cotton crops of the southeastern United States, and methods of control.

Brief summary of the geographic distribution, habits, and habitats of the birds, mammals, insects, arachnids, and chilopods of the Pribilof Islands.