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airplane American animals archaeologists astronomers atom Bell Telephone Laboratories birds birds migrate brain built Bureau chemical coal colchicine cosmic rays created cyclotron developed dinosaurs discovered disease earth effects Electric Company electron-volts electrons energy engines feet fever fibers fish flowers flying Folsom forecast Fremont Davis frequency frequency modulation giant glass gonorrhea hormones human Indians industry insects Institute of Technology known laboratories lamps light living machine Manufacturing mask materials mental migration Mildred Davis miles millions mirror modern Museum National natural nylon operation particles patient pellagra photograph planes plants possible pounds produced Prof promising Prontosil radio resins SCIENCE PICTURE PARADE scientific scientists shown sound species speed stars steel sulfanilamide supernova synthetic telescope television thousands tiny tion transparent transport treatment tube ultraviolet University vacuum tube vitamin weather white dwarfs wing