FERNS FOR SPECIAL PURPOSES 



145 



i 



f 



Ss52 g 



lift 



2 1:2* 



Q 



3, 



> 



Is 

 **** 



I !!: 



I 1 !! 



^s ^ ^* 



1 i 



.^5 





2 ^^ 

 2=1.5 



a > ixo ? 



i s l| 



ii 



f 



i 



