43 Telephone Systems of the Continent of Europe 



carrying 14,000 wires and is of graceful design, harmonising 

 well with the building on which it is erected. Its designer, Herr 

 Ockert, the State architect, may well be congratulated on having 

 produced a telephone-wire support which is not only strong and 

 suitable, but ornamental into the bargain. There is, however, no 

 intention to attach 14,000 wires to the dome, since, of the 2,500 

 subscribers which Stuttgart boasts, no less than 1,000 are already 

 wired underground by means of cables containing twenty-five 

 or twenty-eight twisted pairs each, placed in cement conduits. 



FIG. 152 



These conduits are of rather special design. To avoid the evils 

 attendant on pipes or conduits of large diameter containing a pile 

 of cables the lowermost of which are rendered immovable by the 

 weight of those above them, it was determined to construct the con- 

 duits in stories or divisions one above the other, each capable of 

 containing five cables laid side by side. The removal and replace- 

 ment of any particular cable becomes therefore a matter of easy 

 accomplishment. The details of the conduits, which have proved 

 satisfactory in every way, are shown in figs. 153 to 155. They are 

 built up of inverted cement troughs 270 mm. wide, 75 mm. deep, 



