The SciencesLying-Down Spectacles, Shortage of Coal-Tar Chemicals and MoreBy Alexander Klemin, F. D. Mchugh, A. E. Buchanan on May 1, 1936AdvertisementABOUT THE AUTHOR(S)Recent Articles by Alexander KleminInstrumentation, Measurement, and ControlMust Flying be a "Racket"?Ideas in the AirRecent Articles by F. D. MchughQuartz-Like Glass, New X-Ray Units for Fighting Cancer, and moreStopping The Marine Borer, Trunk-Size Refrigerated Container, and moreMachines Pick Cotton, But—Recent Articles by A. E. BuchananFrost Chaser, Constructing World's Largest-Bore Tunnel and more, January 1936An Ancient Egyptian Sundial, Laboratory Tests for Rugs and morePneumatic Rivet Passer, Gun Detector and more