USEFUL DATA 



+ 



I -lb 

 I 



CO 9, 



•I- 

 > 



+ 





-«|t1H 



> 



<M 



d 

 II 



=!i i 



a s 





-^Jc^i 



-«I(N 



c^i loo 

 II 



g|QO CO 



!♦ •«- 



W--H— J H 



171 



