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Show Ship's I 'ruler-water K ye. 1 o a it hat 1 1 e .hit' x nd det ro vei , i ii lo. at i n 14 -u I one t el m i n--, an A mer j n an has .b-.eioptd an underNca seandi- j 1 1 edit cpi ; pinent w hl-'lt, when ned Ml oniunction with a special water ylas. j ma'r.e it pindile to ih'tmihh oh- I c. i at a di-tauce of "oil feet. A powcrtnl electric lamp j mounted on one I -oil- of a M'-n'l lc!ow the w ater line, i at its liow. This iniiv le turned to j different anidc l.v nn opeintor on r i - - k . IniinediateU f.o ward of this n H,e 'a , -l in ' la I t ') n M)"di fie,) periscope, i Inrmin Ihe ship's undeitra ce n i n-.c.l to follow the ilhiininat.-d path. When j imiii' i locate. J m n Vevel's colirwe fnrpe.lo l llllinclleil wlli.'ll miiv! he d i )) li rte, j pier t nc.i I ! , Tin" i watched Mii-I nt the pmprr in-tant de ! tonej, t h ii e T phid 1 1i e; the mi lie. ( I.ce e.J t hnt 1 he dev ice ronld also he , ne.l on nunc 4tvcc.cr to d an I ae. February I'opulai Mechanics. |