Show PLANES identified BY TUNE discovery Dit covery made by american prove extremely valuable to aviation service air raids on london are no longer the surefire sure fire stuff for heartening the german people that they once were lately the raiders usually find that they can raid up to the english coast and then have to raid right back home again A young american Is given credit for the success of the british in surrounding their capital with a shrapnel barrage whenever the german flyers approach A brooklyn youth who had enlisted in the british aviation service was as elgner to test out an airplane detector which was expected to discover the approach of airplanes before they could be heard so to speak with the naked eye no one expected that the device would make it possible to tell whether the approaching plane were german or british his musical studies had trained the americans hearing to a high degree however he listened through the instrument ment for several days while only british planes flew within its range then he heard a different note A german raiding squadron was approaching the american had discovered that british planes hum in G minor he found that the german raiders are tuned in flat now the british aviation eenice keeps men about the capital with their ears close to detectors and whenever airplanes are heard vibrating in flat a barrage Is immediately ordered |