New Hampshire Experiment Station ] Bulletin 234 



— u 



Si 





aNnoj aid 30iaci 



s 



"o 



(-N aj 





O C 



.2> 



"§^ 

 "o'S 



o ^ - 



'C 'r/3 



& r 

 o 9 



d 



CNfKy H3d 33IUc) 



