MICHIGAN ROADS AND FORESTS. 



13 



Forest regulating the flow of stream in the Southern Appalachian Mountains. The 

 leaves and branches above break the force of the rain drops; the shrubs, ferns and 

 humus below catch the water and pass it slowly down and into the soil and rock 

 crevices, and from this great natural reservoir, weeks or even months later, this water 

 emerges in the numberless springs about the lower mountain slopes and feeds the 

 rivers that cross the hill country below. (Courtesy of American Forestry Association.) 



