22 



CIRCULAR 9 7 7, U. S. DEPARTMENT OF AGRICULTURE 



c 

 O 



co 





1-i 





^ 





<*> 





CO 





c 





•<s> 





"& 





r — i 





o 





l i« 









£ 





o 





<o 





<£> 





^ 



m 





tf 



S 



H 



•<s> 



q 



co 



£ 





c 



o 



Ph 



^H 





J? 



w 

 1-3 

 pq 



X*. 



< 



^ 



H 

 H 



<» 



M 



^S 



£ 



S55 





p*0 





*tf 





<S> 





CO 





5* 





CO 









s 





<0 





^ 



£ 

 e 



CO 



PQ 

 < 



cc 



+3 



^ 





1 s 





1ft 





PB 









a? s 





> £ 







© tO 



tO !>. 



£ O ^ 





•r s >> 





^ -8 £ 





.a . a .fl 





C h3 Q 











io -# ■ CO 



o 



©00 iO 



+3 



CM t— CM 



EC . 



1 1 1 



— ■ o 



— b- o 



z* 



00 CM -f 



CM CM CM 





1 1 1 



o o o 



CU 



■^ Tt< tJH 



Pn 



00 00 00 





cc cc <© 



«t-< 



1 i ! 1 ' 



° ® 



■ I i i i 





J2 _Q X>X! 



•IH K 





G 0Q 



to to tQ iO 



p'" 



H t-I H <N 







-f 







[ I> 1 1 





6 



CO i I 





£ 



T O to oo 



hH^ CO <c 

 | ^ iO to 



S w i i 







§ o o 





+3* a) ' i 



O 





c .d 53 





& - 7 ^ 







© j» ■ g 



o3 







O 





2 o 



55 





ft —* 



•S- - H 



CD 





,.T3 Q 



ft 



(72 









£ C3 += 







rt O fe fl 





_o 



.S ft^ g p 







f- „, rt- ^ 0> 





H 



2-S S ^~ 



•2~ s ~£ 



ft— qj 



»^ oV oT-5 



.2 o.2~ .2 53 

 p-p-p > -i- ft 



t» og O g O (H 



DO l> X ft DO T3 



























hH l-H M 



^ 





- 6 

 £ fc 



00 c: O 



M CM CO 







' 



