



33o~7 



^-f^—K^S-- 



S3 



wafil^r 



o v: 







1868 Shor»i,'s« 







1&~ 



BELT Y 



""--rays 



Figure 118. Historic maps of belts X, Y, acid Z. 



197 



r^rj* ^/."j/i/u.ifjc^; 



