Show New Device Transmits 1000 Words a Minute LONDON Feb 16 By A. A P. P P.- P. Striking evidence of the advancement advancement advance advance- ment mont made mae in invention during 1923 is found in the recent exhibit of ot telegraphic and other Instruments at the British imperial college of science and technology The most notable development Is 18 in telegraphy telegraphy telegraphy raphy delay In submarine cabling 1111 has been largely eliminated by utilizing utilizing util util- izing tho the action acton of light on selen- selen lum which responds so rapidly that the signal sent out Is recorded even before tho the full ful current curent ha hao haL passed over the wre wire A magnetic telegraphic drum re recorder recorder recorder re- re corder Is 15 shown capable of speeding up messages to 1000 words a a min mm- ute This Is effected erected by the te current curent of the tho Incoming signal passing through coHs s contained in a n rapidly revolving Iron drum and ld turning Jt t tinto into a n magnet for a brief space thus attracting a u slight piece of ot iron shaped like liko a bake brake shoe This n operates operates op op- op- op crates a fine tube charged with wih ink causing it to record the signal on the paper tape as ns it 1 flies tes past It S. S Another exhibit is an or an Instrument used In high speed wireless telegraphy capable of printing on an endless slip sUp o of ot paper paper up to a minute Another device dovico which appealed both to la laymen men and professional is Js the complicated photographic apparatus apparatus appa appa- app app- ratus ratus' ratus for taking taking- motion moton at atthe tho the rato of ot a |