Bui. 81, Forest Service, U. S. Dept of Agriculture. 



Plate IV. 



Fig. 1.— Mixed White Birch and Aspen Forest on Sandy Slope South of Eagle. 

 T imber 2 to 6 Inches in Diameter, 20 to 35 Feet in Height. Buildings at Fort 

 Egbert, and Eagle Mountain in the Background. 



Fig. 2.— Typical Forest on the Yukon Flats about 20 Miles below Fort Yukon 

 on the Arctic Circle. Timber Chiefly White Spruce, 2 to 8 Inches in Diameter 

 and up to 50 Feet in Height; Some Balsam Poplar and Large Willow. 



