GOVERNMENT FOREST WORK. 



29 



The vegetal covering has a very decided influence 

 on run-off. For this reason Congress made the preser- 

 vation of conditions favorable to streamflow one of 

 the principal objects in the establishment and admin- 

 istration of the National Forests. 



r** 



A Source of " White Coal " and " Liquid Gold " 



The forest cover has a very decided influence on the purity 

 and abundance of water supply for power, for irrigation, 

 for domestic use. Many communities have entered into 

 cooperative agreements with the Forest Service for the 

 better protection of the watersheds from which they get 

 their supplies. 



Protection of the Public Health. 



Precautions are taken by forest officers to protect 

 the public health. All persons on National Forest 

 lands are liable to trespass proceedings if unsanitary 



