Apr. 15, 1925 
Use of Liability Eatings in Forest Fire Protection 
695 
several factors, chief of which is the 
type of cover. The type of cover in¬ 
volves kind, age, density, and con¬ 
dition of the timber and other cover, 
and the amount and condition of duff 
and litter. The kind and depth of soil 
not it will be a surface, ground, or 
crown fire. 
COST OF SUPPRESSION 
Cost of suppression may also be 
considered as a resultant of fire hazard, 
Fig. 1.—AB represents primary protection cost 
XY represents sum of suppression cost plus losses “or total liability” 
ST represents sum of AB plus XY 
E marks the point of proper primary protection cost, where sum of all costs plus losses is at its 
lowest point P 
is also important, because of its rela¬ 
tion to forest productivity as well as 
to the watershed protection values. 
All of the factors listed above under 
inflammability influence the intensity 
of the fire, and determine whether or 
since it is determined very largely by 
the same factors that govern the in¬ 
flammability and controllability. It is 
also affected by variation in wage rates 
and in costs of tools and subsistence, 
and by differences in degree of efficiency. 
