12 



BULLETIN 551, U. S. DEPARTMENT OE AGRICULTURE. 



O 



r3 



>» 



8, 



o 



•^ 



ft 



.« 



a 





c 





o 







IC 



fl 







w 



£ 



t-) 



fa 



o 



«i 



-1-3 



H 



c3 









S 





o3 





fc> 





<B " 





^ UJ 





H © 





rfl 





C3 





H 





t^- x co co co o ^r co c-iro 



. ©i-h GO OO OO OO 



§? JL ll 11 LI I' 



una r- ^ © co oo cc ro 



^CN -.-« ~,H «^ Nrt 



CM MO CO O iCiO "C ro 



;<->© Oi-t OO OO OO 



.ii A.A ri-J, o± 



.—HO CN^ OO rtH O^H 



!V 



"*«<N CN? © COO COO 



^ rt ^h ICO O O iHH jj -J 



S^w ^r^ 



^11 II 1 ! II II 



^ C-l O *+ -# (NO CO ^ O -* 



K © © r—t> i-t^H OO C3i-h 



n (NN r-5i-H * i-HtH 



Cf O OO OX <N»-r OC3 



^j CM !N *^< CO tJ' O COO OO 



^ii ll II il ii 



^hn x est ox cc r- co o 



^ CO O (NN oo oo o r- 



r cn oi cn c4 "t-5 co ^ 



CO CNi OO i-t C5 OO 



^•«o core OO t-ho -^ -^ 



go ■ • • • ' ■ • e*En 



°CSN MX O-^T OO (NN 



s^ t~- 1— ( X CM OW COO COCO 



^jox <m cm i-irt cw •_;.; 



go e-H 



<h T I II l i II II 



^ O X © O ^- O CO CO ox 



V.OO TH CJH f-iN "^CO 



O O t> O 



CO O 



-r 10 



■^ X 



I- o 



CO ■— « 



OS rH 



O uO 



(M is- 



CC~H 



CM CO 



cu 



o o 



i-*0 



Ol-K 



;__ N ■* -T ro 



i-l 1-ICN 



OJ-H CM 33 



OO t^rt 



iflO rH« 



jNM CN SO 



■no r^- cc 



' ■-£> O CIO 



S?lO lOirr 



cc -C mm oio o »o t^r^ 



cc cm 



i-H S3 



<th cso 



CC ** O CN 



ll ll 



t- CS CC — 1 



no t« o 



a, x co »— uo 

 •■i t- r» cc i— 



oo cc i^ 



^"S 3*3 o S , '5 3 S'3 s'ca'o 2 

 ■JjGQOQ-goQOi -xk^xm-smm 



£ is •- .8 o 



o 3 K S o 



