The SciencesBike Tires Tested, Perfected Rubber Lung, and moreBy F. D. McHugh, Alexander Klemin on December 1, 1939AdvertisementABOUT THE AUTHOR(S)Recent 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 moreRecent Articles by Alexander KleminInstrumentation, Measurement, and ControlMust Flying be a "Racket"?Ideas in the Air