l\AtfA</ 



(P) 



F ig. 7. 



00 



-61 (l 



Fig. 



H=li 



Echelon 

 L.G. Pla< 



5461 



H=5830 



Phil. Mag. Ser. 6, Vol. 27, PL V. 



5461 



(p) 



Fig. 8. 



(s) 



5461 



■H 



H= 16400 



800 



Fig. 9«. 



(enlarged.) 



H=17800(p)only. 



Fig. 



Fig. 11. 



i 



(fO (8) 



5461 



Heterogeneous Field. 

 H: 15800 to 30000 



