Marvels of Science #4

"Marvels of Science" #4 is an educational anthology comic covering various scientific topics and inventions. Featured content includes "Radio Progress," which traces the history of radio broadcasting from Harold Arlin's first full-time announcement at KDKA in 1921 through early sound-proofing techniques and famous broadcasts; "Precipitron: Fights Dust and Infections," explaining how the Westinghouse Precipitron device removes airborne dust particles to protect against infections; and "Home Experiments," providing step-by-step instructions for demonstrating air pressure using a can, water, and heat. The issue also contains articles on submarines, aviation, mapping the moon, wax sculpture, moon travel, scientific wonders, prescription devices, potato patch planes, periscopes, highways, insects, and odd inventions.