22 



N. H. Experiment Station 



u 



i 



6 



B 



3 



a 



o. 



o 



V3 



> 



6 



o 



01 



C 



E 

 o 

 U 



3 

 Hi 



5 



C/} 



g 



4' tr 



3 B 



3 ly. 



1 1 1 1 1 1 1 1 1 ri I M 1 1 1 1 1 ri 1 1 



C\J Irx |r-.^r}- i-i-^^rvi |1-00*^"-C^JnCMiO I^ 



On ^o fo *0 **i 



CM 





I I 



I I 



I I 



t- 00 ^ M — <-- <^ 





Cv 30 •■'* I ^ f^- ^ ^ 



O ^ "< »'^ a^ -^ (^ "*■ O 00 "^l o t- >^ 



o *^- »o "^ 



t >, 



1 



I Si 



is 





c ' 

 o 



•Sfe ..- 





"o.E 



3 u 



go. 



I c 

 • rt 



w 



c n 



r c 



: 







! •J u 



! 



. — -S — wl L^ *"'• " 



- ► 



tf) tn ti O 

 •r. e u — 



*- t» i* >, >. o' s it 





« ^ 



