/)'.'U7irn'r/f on iJir /ii/ri/i^ir £,/iiiifif/i of furvt-A 



t * «/■ itfX Jif 



's^r.<mf-J 



^ ==_".,•,/, ..•». 



!'.T m*-cos S' OL 



d>=~ "^ *■ COS J A, -.^J 

 ^ s n ¥ lit cos S i * ^8^ 



■IT 7ft* COS S S 



" z /I + 7n COS sj~ a 



cu 



