Static tests fall into two groups, the first of which is designed to load all members of the structure approximately in accordance with the worst loads which they carry in flight, while the second is directed to the testing of specific members which are suspected of weakness and which are difficult to analyze mathematically. The nature of the loading in the second type is different for every different test, but the purpose of the first is defined clearly enough to permit the adoption of some standard set of loading specifications, at least for airplanes of normal design. Here, an attempt is made to carry through an analysis leading to such a standard, the goal being the determination of a load which will simultaneously impose on every member of the airplane structure a stress equal to the worst it will carry in flight.

The author discusses the limited benefits of supercharging motors and some of the factors that make supercharging less beneficial than it initially appears.

Various properties of duralumin as used in aircraft construction are discussed, including the effects of temperature, working, tempering, and strength.

The general basis of the theory of lifting surfaces is discussed. The problem of the flow of a fluid about a lifting surface of infinite span is examined in terms of the existence of vortexes in the current. A general theory of permanent flow is discussed. Formulas for determining the influence of aspect ratio that may be applied to all wings, whatever their plane form, are given.

Report issued by the Bureau of Mines over the production of sulfuric acid. As stated in the introduction, "the present bulletin was prepared to cover the main facts in regard to the industry in this country, including a discussion of the supplies of sulfur-bearing raw materials, the situation of the acid plants, the principal points in regard to manufacturing processes, and the uses of the acid" (p. 2). This report includes tables, illustrations, photographs, and a map.

Patent for a calendar that has the ability to preserve pages of interest for future reference.

Patent for a crown setter that can make impressions of varying sizes with the same tool.

Patent for Improvement to Demoutable-Rim-Fastening Means. This device will hold the rim in place.

Patent for an improved signal actuating mechanisms for railways. When the train cars reach an operating mechanism, a flag will be raised where pedestrians or cars cross, and cause a signal to be repeated until the train passes.

Patent for improvements in advertising attachments for scales to "provide an attachment of the character specified, wherein a series of display members are provided, mounted to be moved into different positions, to bring different matter into different positions, and controlled to movement by the stepping onto the weighing platform of the one to be weighed." (lines 11-18)

Patent for improvements in oil burners to have the "means to permit the same to be positioned within the fire box of a stove, by means of the especially constructed support." (lines 12-15)

Patent for a loosely woven material that covers household furnishings so it can be easily cleaned and then reattached.

Patent for improvements in cotton chopping attachments for cultivators that is relatively inexpensive that is highly useful in chopping and plowing cotton plan.

Patent for rotary well-drilling machinery where the "ring or bushing to rotate independently of the table and the present invention is directed to means for accomplishing the rotating effect." (line 24-27)

Patent for an improvement in crates that contains fruit in perfect condition without any bruising or mashing and can be stacked on top of each other.

Patent for improvements in animal watering troughs that has an automatic float control valve in connection with the trough.

Patent for a more efficient and effective seeding device that can disconnect, reconnect, and fasten the ends of a strip of material to form a cylinder.

Patent for harvesting machines that provisions for adjustable attachments and elevator mechanisms used to head maize or similar grain crops.

Patent for a knife with multiple curved blades used to cut food.

Patent for "a tool adapted to rotate valves of an internal combustion engine for grinding the same on their seats." (lines 9-11) It is adapted to connect to the cylinder "of the engine in such a manner as to permit accurate and quick operation of the valve for grinding it, and whereby the handle of the tool may be set at a convenient angle for manipulation, and may be lengthened or shortened according to requirements." (lines 15-21)

Patent for "controlling devices for operating the valves of radiator drain cocks and for cleaning the drain cock pipe, and the object is to provide a convenient device by which the drain cock valve can be easily and quickly closed or opened and by which the drain pipe can be cleaned and kept cleaned." (lines 10-16)

Patent for new improvements for key ring clips that will not detach in a seated position.

Patent for an improvement to rod lifters that prevents the rotation of the rods as well as locking jaws into their gripper positions. The locking and gripping is made more efficient and can release rods quickly.

Patent for an improved pump that can be used in connection with deep wells and provides improved construction that alleviates the necessity of having a long line of extra pipe and the troubling pump rod.