L\ L uite J I tl L s r I t S nice 



rig. 1 8. The result of recurring fires. The forest floor has disap- 

 peared, and the pure uliite sand is left without covciiiiy. SouLhcrn New 

 Jersey. 



]ly ci.iLirti.'sy nf tlif I'. S. Furesi Service. 

 Fig. 19. A " fire line " in tlie Uncompahgre National Forest, Colorado 



