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Show 1EFTSIS FOUND BY ELECTRICITY Nsw Apparatus Will Guide Vessels in Fog Or Past Reefs PARIS, Dec 12 (By the Assocl-nted Assocl-nted Press! Phips may proceed safely safe-ly through fogs or shallow channels, lost vessels loaded with treasure may I be discovered and floating mines lo-icated lo-icated by the electric depth finder, the Invention of which has jusl been an-Inminced, an-Inminced, according to Profi ssor Lan-gen. Lan-gen. the Inventor. ProfesBor Lange-vln Lange-vln holds te chair of general experimental experi-mental physics In the College of France. "During the war I began to work in this direction, for the purpose of I helping the allied navies locate mlms" (lie explained to th Associated Press. ("Previous Investigations In this field (had been rather extensive, but not altogether successful. "My apparatus has been Bticoessful-j Bticoessful-j Iv tried on an extensive scale by tho French navy, it is evident, however, that Its wldst application must be on jshlps rf commerce" Tho apparatus Is constructed on tho wireless wave principle and objects ftre I found within a given radius by means of which Professor Langevjn calls "wave echoes." The apparatus is small and may be attached to a vessel's j wireless equipment SENDS CURRENTS BACK "Elastic electrical oscillation cur-1 rents are given off," the Inventor cx-i 'plained, "and these, radiating in any direction and for any distance more I than 15 feet, register any unusual obstacles ob-stacles In the water. When the cur-, rent Btrlkes an obstacle. It Is lme- ! rupted and sendo back to the appt-- r: i un the Blgnals which I describe as echoes. It It Is desired, one may me.-v-snre the depth of the sea for eeveral miles. |