144 CIRCULAR 100, U. S. DEPARTMENT OF AGRICULTURE 







©^ 



c a 



£'3 



32 



C9 



* S 



,£- <° 



o Pi 







© CO 



■a o 



o 



"3 



CO CO 

 CO CO 



. c a 



I>s 



c o 



o 





=2" 







= HM 



P 







CD 

 P 



