ILLUSTRATIONS Ixv 



PAO£ 



Figure 46. A few years ago this was a green^ luxuriant 

 forest. Picture taken after tlie great fires of 

 August 20j 1910, on the Coeur d'Alene Na- 

 tional Forest near Wallace, Idaho . . . 152 



Figure 47. The first evidence of insect attack are the 

 reddish brown pitch tubes on the bark. 

 Lodgepole pine infested by the mountain pine 

 beetle. Lassen National Forest, California. 

 Photo by the author 156 



Figure 48. The last stage of an insect-attacked tree. 

 The tree is dead and the dry bark is falling 

 off. Lassen National Forest, California. 

 Photo by the author 156 



Figure 49. Wrecked farm buildings due to flood of May 

 21, 1901, Nolichucky River, near Erwin, 

 Tenn. This is one result of denuding the 

 Appalachian Mountains of their forest cover 162 



Figure 50. When steep hillsides are stripped of their 

 forest growth, erosion results. Erosion' has 

 been especially serious in the Appalachian 

 Mountains. View taken in Madison County, 

 North Carolina 162 



Figure 51. A fertile corn-field covered with sand, gravel 

 and debris brought down from the moun- 

 tains by floods. These farm lands are 

 ruined beyond redemption. This could have 

 been prevented by preserving the forests on 

 the watershed of this river 166 



Figure 52. A view towards Mt. Adams and the head- 

 waters of Lewis River. Council Lake in the 

 foreground. National Forest lands lie at 

 the headwaters of practically every large 

 western river. This means that the water 

 supply for the western people used for do- 

 mestic use, water power, and irrigation is 

 being protected from pollution and destruc- 



