| Show PLANES IDENTIFIED BY TUNE J Discovery Made by American Proves Prove 2 Extremely Valuable to British Aviation Service Air raids on London are no longer the sure surefire stuff for heartening the German people that they once were Lately the raiders usually find that v they can raid up to the English coast and then have havo to raid right back home again again A young American is given i credit credit- for the of or the British success In j their capital with a n shrapnel shrapnel shrapnel nel barrage whenever th the German flyers flyers fly fly- ers ers' approach A Brooklyn youth who hid had enlisted In the British aviation service was assigned assigned assigned as as- signed t to t test st out ut an airplane detector which was expected to ap approach proa h of airplanes before they could be heard so to speak with the naked eye No one one expected that the device would make mak it it ft possible e to tell teU wh whether er erthe the approaching plane were G German Germanor or British t His musical studies had trained the Americans American's hearing to a high degree however He listened through the Instrument in instrument instrument In- In strument for several days while only British planes flew within its range Then he heard a different note A German German German Ger Ger- man raiding squadron was approach approach- 1 ing lag The American had discovered that s British planes hum In G 0 He found that the German raiders r are re tuned In B fiat Now the British h aviation aviation avia avla- tion service keeps men about the capItal capital capital capi capI- tal with their ears close to detectors and whenever airplanes are are heard 1 rd vibrating in flat B a barrage Is immedIately immediately Imme imme- ordered |
