34 CIR. 211, U. 8S. DEPT. OF AGRICULTURE 
ranger stations and lookouts are connected with the 
offices of the supervisors by telephone, so that men 
may be quickly assembled to fight fires which the pa- 
trelmen can not subdue alone. (Figs. 17 and 18.) 
Through arrangement with the Weather Bureau 
forecasts of ‘‘ forest-fire weather” are sent to forest 
officers in order that when critical conditions are 
indicated special preparation can be made to meet 
them. 
F-223786 
FIGURE 19.—Airplanes are frequently used to aid in the 
protection of national forests from fire, particularly in 
the immense forests of the West 
USE OF RADIO IN FIRE-CONTROL WORK 
After several years of experimentation and develop- 
ment work radio as a means of communication in fire- 
control work was used in 1930 on a small scale. This 
use of radio will probably remain in the experimental 
stage for some time to come. 
