﻿man Effect 



Phil. Mag. Ser. 6, Vol. 29, PL III. 





Heterogeneous Field. 

 H: 8700 to 17000. 



Pig. 3 a. 



p+i p- 





00 (p) 



Pig. 3 b. 



P-3 PO P+2 P-2 P-3 P+3 



(«) 



Heterogeneous Field. 

 11 : 9500 to 15000. 



■i p-i P+i P-i 



(fO 



