"An adjustable blade metal propeller was tested at five different angle settings, forming a series varying in pitch. The propeller was mounted on a VE-7 airplane in the twenty-foot propeller research tunnel of the National Advisory Committee for Aeronautics. The efficiencies were found to be from 4 to 7 per cent higher than those of standard wood propellers operating under the same conditions. The results are given in convenient form for use in selecting propellers for aircraft" (p. 521).

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 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 a new way to print negatives directly on sensitized metal by dying the print, removing the dye stains, burnishing the "high lights," polishing the dye print and finally lacquering in order to make permanent. This gives the image a bas-relief effect.

Patent for a surgical splint specifically for the substitution of erectile tissue of the corpora cavernous of the genital organ to promote fecundation even in the absence of an erection.

Patent for improvements in pneumatic tire that gives a novel means to repairing a worn casing, a blow out, or a rim cut.

Patent for improvements for condensing things such as lint and hair and removing them from "the screen cylinder of the apparatus by a screen pickup roller." (lines 13-15)

Patent for improvements in a power transmitting mechanism that is "designed for the purpose of connecting a driving or power shaft with a driven shaft, whereby the driven shaft is continuously rotated from the driving shaft." (lines 11-14)

Patent for improved method of coating pipes, bars, angles, etc., by applying centrifugal force to the item after being immersed in a coating bath.

Patent for a sling shot that is more durable, efficient, and less likely to break. Includes instructions and one illustration.

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