9 - 



S 7 - 



6 - 



5 - 



o New 

 .■• • 1 Yr 



— X 2 Yr. 



•vv 



•••• 



X 



JUNE 



JULY 



AUG. 



SEPT. 



OCT. 



F-lgux'e 10. — The ether extvaoti-oe aontent of ponderosa p-ine needles 



during the 1968 fire season. 



9.0 



8.0 



" 7.0 



S 6.0 



5.0 



40 



3.0 



V ♦/ • ^'x*' 



O New 

 — • 1 Yr. 



X 2 Y. 



JUNE 



JULY 



AUG. 



SEPT. 



Figure 11. — The ether extractive content of ponderosa pine needles 



during the 1969 fire season. 



10 



