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Show I SEND SIGNALS UNDER WATER hi Inventor Claim to Have Brouaht Ha Wonderful Instrument Almost W to Pitch of Perfection. (K, ' Huliiiiiirliio hlKiinlliiK for the protee- jUj tlon of shipping, and other iimn of the .- submarine telegraph oscillator aro ills. cussed hy Mr. It. P. IHuke, mi Amor- lean electrical engineer, In tlio .Smith' IH Bonlnn annuiil report. H The author reports some Interesting H trials of (IiIm electrically operated os- H dilator which vlhrates under water, lioth sending and leceMuu' signals, nud claims Unit It Iiiih lieen tested sue- cessfully, trmisinlUlvK MkiiiiN over SO miles, and oporntlng as an underwater tolephoiie for -100 to SIX) yards. B Among the luvtiltiuldo uses eiiuiner- nted nro signaling In fogs mid hetween mihimiilues; iliii'ct comiiiuulcatloii he tween coniiimndeiH or ships within M short (IIMaiice or each oilier; location of hell buoys; as a means or sounding, nnd possibly tiN a means of directing WM or Bteeilnj; torpedoes by sound. H Mr. Illakc reiiinrks that the oscllla- H tor represents an luiportaut step for- WM ward In the sclenco ol navltiatlon, n niakliiK It possllile to surround the ' n coasts with a wall of mhiihI so that! jH no ship can get Into dnuKcrons waters SR without rctvlvliiK a warning and I W clliiilimtliiK' collisions between ships, I except through uecllKence. ' U asserts that Indications point out that It will ho of crcat service In locatliiK lcehers ami sccutini; sound-' Iiiks from ships runnlnc at full speed. Mr. ltlake sa.s that for naval pur- poses It prmldes an auvlllary means of hhort distance sIkiiiiIIiik. avnlliihle lit nil times, uhleh cannot be shot nwny, and that It widens the possibll- Itlcs of submarine boats to an extent beyond our presenl grasp. ! |