498 HULL SYSTEM TECHNICAL JOURNAL 



an H;1 Paso-Los Angeles circuit and another circuit between Denver 

 and Los Angeles with stations at intermediate points along the line. 

 l-",ast of DenxiT facilities of the same t\pe on an existing through 

 route \ia K.uisas ('it\- to Chicago witii four intermediate repeater 

 stations are used foi' liie C'hicago-Diincr poriioii of the ("hicago-I.os 

 angeles circuit. Tlie facilities and c(|ui|)nKni .irr.uigements permit 

 rapid changes at the \arious repeater stations so that the circuit lax- 

 out nKi\- easih- he changed to take care of temporary rearrangements 

 necessitated by trouble and to set up different layouts for the e\ening 

 and night loads which at present are heavier than the day load. 



Duplex telegraph equipment has been installed at various stations 

 along the new route from Denver to Los Angeles for operating four 

 direct current telegraph circuits derived by compositing the open 

 wire circuits. In addition, a 10-channel carrier current telegrapli 

 system has been installed. Thus a total of 17 circuits, 3 telephone and 

 14 telegraph, operating on four wires are at present available o\'cr the 

 new route for liic lhr(iui.;li sc-rxice. Tliis requires a consiflerable 



cjucufT wear 



-Siinplilu-d l-.(|iii| 



