Apr. 15,1925 Use of Liability Ratings in Forest Fire Protection 
731 
1600 
1521 
144-4 
1369 
1296 
I225 
1156 
1088 
1024 
861 
800 
841 
m 784 
5 729 
5 676 
0 625 
^ 576 
1 528 
.§~ 
^ 361 
§^324 
S"288 
?»* 
5 225 
186 
.8 168 
144 
121 
100 
SI 
64 
48 
36 
25 
IP 
9 
4 
I 
0 
4 
• 
© 
♦ 
Alpi 
le 
• 
k 
© 
• j 
Se\) 
# 
• 
w 
-*1 
✓ 
e 
• 
© 
-Pin 
on - '- 
unip 
sr _ 
•• 
• 
• 
» 
Gra 
X 
*©""" 
. 
X 
f ® x 
X 
0 I 4 9 16 25 36 49 64 SI 100 (44 
LEGEND 
• Yellow Pine (8Q5fires) 
e Douglas Fir (39fires) (approx¬ 
imately Same curve ao yellow pine) 
1/Alpine (32fires) (only lower points 
of curve) 
X Grass, Brush, Pinon and Juniper 
(133 f i res) 
256 324 400 484 576 676 
A rea_ Per Pi re -Ac res 
784 900 102-4- 1156 1296 1444 16 QQ 
Fig. 33. —Northern Arizona and Western New 
Mexico (Region 18): Relation between size of 
fire and cost of suppression 
Note. —Data for Region 20 included for alpine 
type. 
