Show ir ir 4 ar hungry D ducks acks saved britain tests at zoo resulted in perfection of device for detecting submarines WAS MENACED BY starvation was developed as result of experiments mado made with scopes by two medical Madi calMen men in london zoo london tome lome they was saved by tile ca cackling of geese it may bo be well that the llvy livy of tho the future will assert that britain in her ber hour of peril was saved by the quacking or ducks how ducks eating biscuits thrown to thern them at the pond in ili the london zoo led to the discovery of U boat detectors was a bit of inside war stuff told by prof J T mcgregor morris at the scientific novelties exhibition hero here recently old invention In vonnon incomplete before the war it la Is true there were Pub submarine marine detectors a microphone to which was vas attached a diaphragm but unfortunately this device was non alg dl sectional ional that Is it indicate from which direction the undersea a boat was coming horns and even trumpets were used to assist the instrument but up to ta june 1015 the detectors were of little use meantime Me antimo tile the submarine campaign was increasing in intensity ond nd the united kingdom was wan faced with tho the possibility of being starved to death then according to the story told by professor morris putting ones onea head under water where sounds could easily be heard suggested to sir 13 broga r a gg find and sir enget tile the use of tho the stethoscope the instrument that Is to the doctor what the brief case la IA to tho the lawyer test succeeds at zoo tho the two medical men went to the tha zoo to try out their scheme while sir william throw biscuits to the ducks his colleague collea guo by means of nn an instrument men t on the lines of the stethoscope and with a part in tho the water tried to hear the ducks eating suddenly sir richard throw tits his instrument ment down with nn an impetuous jerk abuck A duck hall had attempted to eat the part of it under water and the noise was waa deafening out oui of tills this incident was evolved the a device which looks like nn old fashioned warming wanting pan this when turned slowly jn ln the water indicates the direction from which alch a submarine ine is coming it could detect the presence of it submarine ove miles distant and the steam turbine of a do ten miles away |