The SciencesGerms More Harmful from Active Cases, Perpetual Motion—Almost and MoreBy F. D. McHugh, Alexander Klemin, A. E. Buchanan Jr. on February 1, 1933AdvertisementABOUT 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 AirRecent Articles by A. E. Buchanan Jr.Bug Eat Bug, Wire Mileage and morePlanetarium Staff, Photo-Cell Output and moreWater Weight, Fingerprints Raised from Cloth and more