PROTECTION 167 



which the Forests are administered give the Secre- 

 tary of Agriculture power to institute preventive 

 measures. To insure the sufficiency and purity of 

 the water supply of a municipality or of an irriga- 

 tion district, or to prevent floods and snowslides, the 

 use of watersheds for grazing, timber, special uses, 

 or settlement is especially restricted when such re- 

 striction is found to be necessary. On steep grass 

 or timber-covered mountain slopes both grazing and 

 timber sales are prohibited, if necessary. 



Public Health. From the relation which the 

 National Forests bear to the streams that issue from 

 them, it will be seen that they may exert a great 

 influence upon the health and general welfare of 

 the communities in the valleys below. All persons 

 either permanently or temporarily camped upon 

 National Forest land are liable to trespass pro- 

 ceedings if unsanitary conditions result from their 

 presence. All camp refuse must be disposed of 

 either by burying or burning. This regulation ap- 

 plies to hunting and fishing parties, as well as to 

 large logging camps, sawmills, and construction 

 camps on National Forest lands. Thus the regula- 

 tions strictly guard against the pollution of the 



