194 Telephone Systems of the Continent of Europe 



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special about the indicators, which are of the familiar American 

 pattern. They are not provided with a night-bell circuit, which 

 seems to show that there is no present intention of inaugurating 

 a continuous service in Berlin. The jacks,* all the contacts of 

 which .are of platinum, are joined in series by soldered wires. 



The form of jack used 

 is shown clearly in fig. 

 63, and of lever switch 

 in figs. 64 and 64A. A 

 general plan of the con- 

 nections is given in fig. 

 65. As will be under- 

 stood from the platinis- 

 ing of all the contacts, 

 no expense has been 

 spared in the construc- 

 tion of this board ; and, 

 in fact, its workmanship 

 is excellent. A few sec- 

 tions of this 6,ooo-line 

 multiple have been fitted 

 up experimentally in the 

 form of a horizontal 

 table as shown in fig. 66. 

 The position of the plugs 

 and cords does not strike 

 one as being happily 

 chosen ; they would 



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Bottom pl( 



an. 



FIG. 64A 



have been much better 

 overhead, as in the au- 

 thor's Mutual board at 

 Manchester. As arranged at Berlin, the cords must cover up the 

 jacks nearest the edges, and require to be continually pushed 

 aside to allow of the insertion of fresh plugs. 



A general plan of the connections of Messrs. Stock & Co.'s 

 single-cord boards, as supplied to Hamburg, is given in fig. 67. 

 This system is worked with test cells at the subscribers' offices, 

 which are cut in when the phones are lifted off the hooks, as 



