4L2 Telephone Systems of the Continent of Europe 



O 



. 



SCALE OF 50 



CENTIMETERS 



fixtures are of exceptional size 

 or special design, except per- 

 haps a neat little skeleton 

 turret at Lucerne. The cen- 

 tral telegraph station at Berne 

 is being rebuilt and raised 

 with the view of a complete 

 reorganisation of the system 

 on the Zurich plan ; this 

 building when ready will be 

 fitted with a large standard 

 designed by Dr. Wietlisbach. 

 New telephone administrative 

 offices, together with stores and 

 workshops on an extensive 

 scale, have recently been com- 

 pleted at Berne at a cost of 

 4o,ooo/. 



OUTSIDE WORK (TRUNK) 



The wire used for trunk 

 work is 2 mm. copper for dis- 

 tances up to fifty kilometers, 

 and 3 mm. beyond. The insula- 

 tors are double-shed, of a larger 

 pattern than those employed 

 for the local lines. All trunks 

 are metallic circuit, the wires 

 being crossed at intervals, the 

 twist plan having, after trial, 

 been abandoned as unneces- 

 sarily complicated. The poles 

 are generally wood, injected 

 with sulphate of copper, with 

 iron cross-arms. Fig. 151 shows 

 a common form. It will be 

 noticed that, contrary to the 



FIG. 150 



