Radio: FM & Defense

Radio's usefulness on the battlefield may have suggested the idea of its use on an industrial reservation to engineer-managers at the U.S. Army's new, huge (14,735-acre) Elwood shell-loading plant near Joliet, Ill. In 35 guard stations, 19 guard automobiles, five fire stations and five fire-department squad cars, installation of two-way radio communication is complete. The nine diesel-electric locomotives that are beginning to shunt explosives around on Elwood's 100 miles of track needed, since normal AM reception would be impossible for them, a further refinement. First of these locomotives—and probably the first anywhere—had...