The SciencesGiant Strip Mill, Binocular Magnifier, and moreBy Alexander Klemin, D. H. Killeffer, F. D. McHugh on May 1, 1938AdvertisementABOUT THE AUTHOR(S)Recent Articles by Alexander KleminInstrumentation, Measurement, and ControlMust Flying be a "Racket"?Ideas in the AirRecent Articles by D. H. KillefferIndustrial ConsultantsThe Pilot Plant's Value to IndustryIndustry Gets NoseyRecent 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