Fi^. 1. 



Thz]..Ma^. Ser. 4.Yo\.8.^U\. 



Fig. A. 



I \ V 



12 



Scale, forFws.l&2. 



H V-^—i h 



4- 5 B 7 



ScoIa for FigsA.S). &3. 



#^ 



m 



E ^,. 





^"^^^SS^ 



