Bui. 234, U. S. Dept. of Agriculture. 
Plate V. 
Fig. 1.— Burning a Lodgepole-Pine Brush Pile under 2 Feet of Snow. 
Fig. 2.— A Brush Pile Like This Will Light Easily and Burn Clean Under 25 
or 30 Inches of Snow Without Damage to the Remaining Trees. 
