OCR Text |
Show Signaling Under Water. IjpMlH Thero has recently boon put In rp- mil oration at Boston a system ot signal- Dg jL ing beneath tho waves to vessels ap- S (I proaching dangerous shores durlns Sj H foggy weather. Tho apparatus con- m jH slsts of two receivers, locatod on n H either Ride ot tho ship below tho water W j line, and connected by wires to tho SI' LM wheel houso, whero a telephone bor f M Is placod. Tho signals from shore are wi'SvSlI given by striking a submerged ball at fli(!l regular intervals. When tho observer w jlfH wishes to ascortaln his location he 5 ' takes tho oar piece, and by marine 3 l tho iiwltch olther to tho right or loft, K i soon ascertains upon which side thu 1l'J sound Is tho loudest, and upon that fl-l sulo tho boll will bo found. Tho yulu Si jl of a systoni of this naturo la at one I sV apparent when It Is homo In mind ShN that togu frequently obscure the most S Sfl poworful lights, and thnt certain at 81 mosphcrlq conditions during stormy flLI weather render fog horns almost, li '111 not quite, valueless. n UH |