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BELL SYSTEM TECHNICAL JOURNAL 



mitter efficient through the wide range of positions in which it is 

 placed by the user. 



The latest form of this instrument is shown in Fig. 3. In addition 

 to the usual black finish, this telephone as well as the bell box and 

 other station apparatus have recently been made available in five 

 colors, statuary bronze, old brass, oxidized silver, ivory and French 

 gray. 



Practically all the service for business purposes is provided by 

 individual lines or by private branch exchanges as discussed later. 



CSi^ 



Fig. 3 — The latest form of hand set. 



For residences, howeyer, there is in the United States a large develop- 

 ment of two-party and four-party lines. The two-party stations are 

 provided with selective ringing so that each station is signaled only 

 for its own telephone messages, and the four-party stations are pro- 

 vided in some places with selective ringing and in others with semi- 

 selective ringing. 



Party lines have furnished a satisfactory means of providing service 

 to small users and have been an important factor in the development 

 of new fields of service in residences. 



To care for situations where something more than a single line 



