220 



l\\ ecu. 



(^lo cm) 

 (TiS cm) 



J, 



Efot4 



^ — ■ " wiuot"- K ■ ji s 



221 



(i) f/JDu/Z^uLJ /Jji' Potc/<J u;<W ^,xri> 



rvHstctj (AvT.i-^^ ,;i,7;n "'i "'rt'- 



