176 THE USE BOOK. 



lines and instruments will be free to the public unless 

 the free use should become burdensome to the Forest 

 officers or interfere with the efficiency of the system for 

 Service use. The excessive use of instruments not only 

 seriously impairs their efficiency, but is detrimental to 

 the prompt transaction of Service business. 



The number of telephones that can be allowed on the 

 lines is of necessity limited. The Service will permit 

 the connection of private instruments only when they 

 are so located as to be of assistance to the Forest officers 

 in the performance of their regular duties, or are placed 

 in the houses of persons who will act as lookouts for 

 forest fires, or are to be used by persons who have co- 

 operated in building the line. The length of the line, 

 size of wire, and manner of construction will deter- 

 mine the number of instruments allowable. When for 

 any reason private telephones are allowed on lines con- 

 structed entirely by the Forest Service the following 

 points should be observed : 



Application forms for such instruments must be ap- 

 proved by the Forester. If granted, a reasonable 

 charge will be made. 



The right to connect with the Forest Service line 

 does not give the subscriber the right to use the ex- 

 change of any commercial company with which this 

 line may connect. If it is desired to use the exchange, 

 arrangements must be made by the subscriber with the 

 owners of the exchange. 



Toll will be collected from subscribers and others 

 for the use of those Forest Service lines over which free 

 service is not granted. 



