Show oil SUBMARINE REEFS BEllS I ITO TO PREVENT WRECKS fiND MUCH fAVOR Apparatus Known to Carry Sound 27 Miles at Sea I 4 W WASHINGTON May fay 20 In In Jessen lessen lessening in ing danger in navigation and delay in transportation the submarine si signal nal bell has become an effect effective o agent and andis is bein being adopted by maritime interests generally generall according to the hydrographic office 0 or of the navy The government reco recognizing tho the substantial sub service rendered rendered ren ren- dered to shipping by the tho submarine bells bell has decided to extend their installation installation in in- from time to time to light bt vessels on both coasts and upon the tho great lakes At present many of the light vessels are thus equipped and the signals which they tend out arc are of vast aid ald Canada al also o Las has taken up the tho equipping of f her coasts and En England land Germany Holland France Sweden and amI Denmark are arc doing the same samo The bells belIs operate durin during fogs fos and anel at II ni night ht and tho the sound waves emitted by bythe bythe bythe the bell under water have been known to travel as all far as twenty seven miles These sound waves are picked up ur by the receiving microphones on board ships and by the code signal of each station the vessels vessel's navigator is able to tell where he is |