Switzerland 



399 



only 630 per subscriber per annum, just over two per subscriber per 

 working day. Many of them were, of course, far busier than that ; 

 but the majority were evidently trying not to exceed their 800 

 free talks per annum. On the other hand, the trunk connection 

 average was very good. 



The switch-board is placed in a large and well-ventilated 

 room, and everything is arranged in readiness for the ultimate and 

 inevitable advent of metallic circuits. 



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 tAAAAAAAAAAAAA \AAAAMAAAA; 



I i ; v \ , V ' i .' v V / . / V v^ v v V rf v 1 '': i/ V i 



T' 1 . \\^\M M ^ ; A /. , '^A A ;;>,;.; U\'.y 

 r '-j V v' V v V / c / V V V -; *' j 7 V V V V V v'VV V j/V 



, \ ;. i r i ;. A < A ;. A f i i A A r U A A xi .* 



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FIG. 141 



The arrangements for the trunk line service have severa 

 features of interest. Translators are interposed between the 

 trunks and subscribers' lines, even when these last are metallic 

 circuits. A peculiar arrangement (figs. 141 and 142) of translator 

 is adopted with the view of excluding from the circuit all other 

 coils and electro-magnets. The translator itself is of the 

 Landrath pattern, and consists of two bobbins, B B, with iron 

 wire cores, placed side by side, the cores being joined by a yoke 



