9000 



3 

 CO 



c 

 o 



o 



c 



8500 



8000 



ext. 



"diff. 



O ° 



MAY 



JUNE 



JULY 



AUG. 



SEPT. 



Figvcre 15, — The energy content of ponderosa pine needles ^ ether 

 extracted needles, and ^^^^j^ during the 1968 fire season. 



Figure 16. — The energy content of ponderosa pine needles , ether 

 extracted needles, and B.j.r.r. during the 1969 fire season. 



