★5.0
Popular Science J-6-2
Considers marvels of modern science: Fingerprints, cosmetics, radio, microbiological research, airplanes.
★9.0
Popular Science J-0-6
Preparation of "spawn" for commercial mushrooms, which grow to the tune of "You Came Along." Also: extraction & uses of snake venom; personal dress forms; a Frank Lloyd Wright building in Racine, Wisc.
★7.0
Popular Science J-0-5
Huge electric sign operated by photo cell animation; freshwater fauna propagated by Carolina Biological, sold and used for research; pickup and delivery of airmail in flight with small planes.