\\ \ i i i; - i 





121 



HIE LONG DISTANCE SENDER 

 The No. 638 Sender, located at the point where the water 



l.-\.-l i- to I. red, is op.-r.ti. -d li\ a float, 20" in diam 



.ui,| a ruun' i. Hi.- tl-Mi -h.iill U- urnunded by a 



-idling !HI\ to |. !..(.-. i ii from ..it-! wave* or surges. The 

 i. -i I- o|ui|. ; .-.-in, ..I contacts, one of wttdi 



-lost-, lor a Ir.Hlion of .1 -..ml . \. IN tun. tli. \%.tt. f n-.-- I JO 



,,i .1 I,,,, i. tli. -Mill,-!, uli.-n il - falls] JOofafooL These 



acts are so designed that it i* iin|.,i!.l.- i..r ili.-m t., 



r... :,.; v. 688 i-'i.-..i Opantod tata BM 

 uff DlsUnce (traplii*- 



and k.-.-p thr , iivuit rlost-d. thus inl.-rl. rin^ \M\\\ tin- further 

 n|HT.iti.,ii ,,| tin iiiMiiiiu.-nt. Thr\ iveie developed in lhf(iurl-v 

 ' -ory, and have been -ul.|. , i. .1 t<> t.-n- of ih..u-anU of tests 

 \\ith li.-a\\ 1...1.I. .iii.l up t.i 250 vnlt-. \sithout any failure or 

 < \< n a sign of dct i i.n.ition. 



\> -tatr.l aln\r. inr Snnl.-r \M!! .ip.-ral.- -.\rral IJ L'I-I. i-. 



i.il Indicators, or a combination >i <*n- <r more Registers 

 and Indicators. 



