1 



124 



BELL SYSTEM TECHNICAL JOURNAL 



14,000 



12,000 



10,000 



8000 



6000 



4 000 



2000 







:i>_ 



-21 -(I -I -I -0.8 -0.6 -0.4 -0.2 0.2 0.4 0.6 0.8 I I 



8000 

 7000 

 6000 

 5000 

 4000 

 3000 

 2000 

 1000 



-22 -12 -2-2 -1.6 -1.2 -0.8 -0.4 0.4 0.8 1.2 L6 2 2 12 22 

 2000 r — 



1800 

 1600 

 1400 

 1200 

 1000 

 800 

 600 

 400 

 200 



-50 -30 -10 -10 



1-6-4-2 2 4 6 8 



MAGNETIZING FORCE (H) IN OERSTEDS 



10 10 30 50 



Fig. 7 — Effect of superposed d.-c. fields on the a.-c. permeability of permalloys and 

 permendurs. Annealed. — Continued on page 125 



