The SciencesPneumatic Rivet Passer, Gun Detector and moreBy A. E. Buchanan, Alexander Klemin, F. D. McHugh on July 1, 1935AdvertisementABOUT THE AUTHOR(S)Recent Articles by A. E. BuchananLying-Down Spectacles, Shortage of Coal-Tar Chemicals and MoreFrost Chaser, Constructing World's Largest-Bore Tunnel and more, January 1936An Ancient Egyptian Sundial, Laboratory Tests for Rugs and moreRecent Articles by Alexander KleminInstrumentation, Measurement, and ControlMust Flying be a "Racket"?Ideas in the AirRecent Articles by F. D. McHughCoal and Kilowatts, Carboloy Extrusion Process, and moreIndian Arrow Poison for Arthritis, Mental Disease, Enamels for Plastics, and moreGlycerine from Petroleum, Electrostatic Iron Ore Separator, and more