20 



N. H. EXPERIMENT STATION 



[Bulletin 187 



a 

 '5 



a 

 o 

 O 



2 S''' 

 'C .*^ 



(D w c3 

 » C H 



<tH._ - 



a u ^ 



*-* * 



W.2 2 



M_S to 



g^ 



is tB O 



o ce M . 



O o 

 ^ o ^ C 



E =e8 



5o 



W cs' 



a in <i> cc CJ 



5^2 M W&r3 C 3 

 ,« C ^-^ q- ^ M 



^ c ^ 2 '^ -^ «^ 



c— ^ ^ 



'O _ M tf 



-5 -sis 





-ce^ 



C^ 



K " oj a 





_ =5 5 



a 



a: to _ 

 K o c 

 — •== 



« P M 



0/ ^ r- 

 iO r-* 



c 



OJ 



ts 



-a -a a. cD^ g 



t _- c js c 



» ^ s; 





^^ Si 



U 



c 

 tu o 



a; CO 



tjcs 



^f .5 £ 



._• o « 

 to c;^,^ 



"5 c c ^ 



t-— ci.'Z 



SIS' !? =3 



to « ^^ 



C to 

 "- t/: 



C5 QJ rt 

 u ^*+- 

 b/ C C 



*• cr 



E-5; 



r;^ Q'**-. 



C ^^ 



iH O 



o; S 



!- - — to 



c3 e 



rS .-" o -_ 



a> QJ S •— o ^ 

 " S Ss^ce^ a^ fe fe ! 

 o 





C OJ 



c to't; 

 C W 



C""- 



*^ QJ tc ^ U 



O 



O 



^»^ to 



.-= £i =« g " 



-BE e 



giitoSS 



o 

 O 



I 



I 



I 



