'"» -n^ 



"--'*' ' • 



-sr^, -^; 



>*'... 



(T) ■ ^y -'.iX' (T) '■■ 



■v. 



f . 



;i 



""^.'? 





A 



^;- 



r 



r 





' ->••• 



Figures 6 to 10 



478 



