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Fig. 21 — New standard volume indicators installed at a network key station. 



Fig. 21 shows a group of new standard volume indicators installed 

 in a network key station. 



Conclusion 



This paper has described a new volume indicator which is inexpensive 

 and whose characteristics are thought to represent a good practical 

 compromise for a general purpose instrument of this kind. It has been 

 commented upon favorably by all who have had any experience with it. 

 It has been adopted as standard by the two largest broadcasting com- 

 panies and the Bell System, and it is hoped that other users of volume 



