Figure 6. — After the flame front passed here, the fire was extinguished with a fog 

 nozzle. Most of the remaining branahwood was over 1 am. in diameter. About 80 

 percent of the branahwood less than 1 am. in diameter was transformed into heat 

 energy . 



I I I I I I I 



.005 .010 .015 .020 .025 .030 



l/o - ft. 



Figure 7. — Feraent weight loss in the flame front and peraent heated to ignition as a 

 function of the particle surface area-to-volume ratio. 



20 



