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tional Forest, California. This "Chapar- 

 ral" is of great value for regulating stream 

 flow. The streams are used for water power, 

 domestic purposes, and for irrigating many 

 of the largest lemon and orange groves of 

 southern California 132 



Figure 38. A forest officers' temporary camp while fight- 

 ing forest fires. Near Oregon National For- 

 est, Oregon 132 



Figure 39. Putting out a ground fire. Even if the fire 

 does not burn the standing timber, it kills the 

 young trees and so weakens the larger ones 

 that they are easily blown over. Wallowa 

 National Forest, Oregon 136 



Figure 40. Forest officers ready to leave a tool box for 

 a forest fire in the vicinity. Such tool boxes 

 as these are stationed at convenient places 

 on National Forests ready for any emer- 

 gency. Arapaho National Forest, Colorado 136 



Figure 41. A forest fire on the Wasatch National For- 

 est, Utah. Forest officers trying to stop a 

 forest fire by cutting a fire line. Note the 

 valuable growth of young trees which they 

 are trying to save at the right . . . . 140 



Figure 42. A forest fire running in dense underbrush on 



one of the National Forests in Oregon . . 144 



Figure 43. Men in a dense forest with heavy under- 

 growth clearing away brush to stop the fire 

 as it is running down hill. Crater National 

 Forest, Oregon 144 



Figure 44. Fire in a Lodgepole pine forest in Colorado. 



Arapaho National Forest, Colorado . . . 148 



Figure 45. A mountain fire in "Chaparral" five hours 



after it started. Pasadena, California . . 148 



