Area Burned -Acres 
706 
Journal of Agricultural Research 
Vol. XXX, No. 8 
©Green timber and burns together (37firee) 
Curve based on lower points is aeaumed Fig. 7.—Western Washington and Oregon (Region 
to represent rate of spread in green 5): Relation of size of fire to time elapsed between 
timber. Upper curve * slash and burns. discovery and attack 
Date for upper slope insufficient. 
