Apr. 15, 1925 
Use of Liability Ratings in Forest Fire Protection 
717 
O White and Norway pines (upper jioints 
assumed to represent worst condi¬ 
tions (slash) lower points (timbered 
areas), (88fires) 
X Jack Pine (mostly reproduction areas 
and slash). (136 fires) 
H Open Grass etc. (38fires) 
Fig. is—Lake States (Region 21): Relation of 
size of fire to time elapsed between discovery and 
attack 
Note.— Not enough data for hardwoods and 
tamarack. 
