42 



BULLETIN 224, U. S. DEPARTMENT OF AGRICULTURE. 



65 



A 





O 





« 



l-S? 



Pi 



8 



Hi 



*53 



< 



S 



?, 



C 



1— 1 





Ph 



cc 





£d 



fc 



O 







5* 



Pn 



00^ 



p 





e ° 



.c o 



1 g 





P ■ 



3°» 



b £ *-< 03 P, 



o^s^ 





0.0 



ft? 



3£ 



<oooeq 



OCOIM 



8SS 



odd) 

 l-< — fcH 



OOOOO 1-I1H i-H 



■~C7- h o o o o 



00000 



OOOOO 

 OOOOO 



OOOOO 



OOOOO 



00000 cr~c^o cr*o 00 



CDOOOO 000 0© lOO 



tD^OHO -^ O ^J* O 



r-T' N QO" r-T .-T 0~ 



HTH 00 





I §2 



OOOOO 



zssl 



'bb o o t»o 



ft 



SuSS 



MO 



a> ft 



«M I 



2 cc* 



£ M 



•s & 



Jz; to 



S-S 



.a -a 



.5.5 





.ft 

 A 



O00 (©NCO OHM-^lC OOOJOfOTji IO CD 

 i-h ^H <N CM C^ CN <N <N CM <N CO CO tji -tf> ^Ji tP -rji 

 iCUS 10 uo lO 1010*0*0 iOlClOiflift *0 iO 



