22 



N°. a, as is llie case willi Lfiluti [\\u\ Koltnboemie ''on the 

 sanie isiaiui; via Mocara-doea . Ilie lele|»liniie's aciidii will 

 nol l)e siiHicietii l«» permil rei-ular ronversaliou . wheii llic 

 arraiigenienls are uiade as is sliowii iii llie diaiiram N°. 1. 

 (loiiceriiiiiiï Ihis jioinl experieiice sliowcd , thal only souie 

 paris ol" llie Iransmilted speech could be heartl distiiiclly , Ihougli 

 in Ihe inean time the telephone was workiniir veiy well hul 

 separately helween La/iat and Mocara-doen , and hetweeu 

 hollabocmic and Mocara-doea. rre(|iionlly I he wires , connecling 

 these places, are not weil insuhiled. 



In niakini,' the arrangemenls as is shdwii in Ihe diaijranj 

 N°. 2 , 1 however ohlained a splendid snccess helween Lnhal 

 and Kofltdioemip , lo Ihe great astonishnieiil ui" all those, who 

 sloüd lislening and wliu knew Ihe arrangemenls. Even 

 KoUnboemie supposed, Ihal the person , who was speaking 

 al Lahal , slood at Moeara-doea. 



In the diagram N°. 2 the telephone al Lahal is represenled 

 hy T^, Ihal at Moeam-doea by Ts and Ihal al kotlahucmic 

 hy T\. Of com'se the currenl coming lioni Ihe terminal 

 telephone 1\ will divide in the point /', hut, as Ihe resislance 

 «r Ihe circuit trom P lo T\ is a very great one (nearly 150 

 kilometers wire N°. ü , Ihis part of Ihe circuit will receive 

 only a very small poiiion n\ ihc ciii reiil , and il may he 

 considered necessary lo examinc lo wiiirli caiises llic success 

 ] menlioned helore was owing. 



Il is a lacl verv well known . Ihal llic plu^nonien;! . which 

 lelephonv gives lo show, are o!' ;hi iniriciilc characlcr. The 

 lelephone-cnrrenl ilscll' is ;in indiiccd one. Ihal indures ait 

 i'xim-cMircnl in Ihe wire, llowing in a reverse direclion lo 

 that ol' the telephone. Again IIk^ cessiilion ol' Ihe h('ad-( inrcnl 

 induces a scnmd cxlra-cuircnl . in Ihis ciisc llowing direcl or 

 in Ihe s;inic direclion as Ihi' Icirphonc-ciiiiciil . ;ind Iherelore 

 proloMging ils cllecl. This direcl e\tra-ciirr(^nl is llic inosi 

 povverhil, heciiusc- ils lorce is added to Ihe l'orce ol' Ihc 

 lelcphonr-ciirrenl : iiiid ycl il seenis lo hc strengthencd hy 



