USDA Forest Service 

 Research Paper INT-140 

 August 1973 



EFFECTIVE HEATING OF FUEL 



AHEAD OF 

 SPREADING FIRE 



William H. Frandsen 



INTERMOUNTAIN FOREST AND RANGE EXPERIMENT STATION 



Forest Service 

 U.S. Department of Agriculture 

 Ogden, Utah 84401 

 Robert W. Harris, Director 



