II 



56 



3.0 

 2.9 

 2.8 

 2.7 

 2.6 

 2.5 

 2.4 

 2.3 

 2.2 

 2.1 

 2.0 



1.9 



1.8 



1.7 



1.6 



1.5 



1.4 



1.3 



1.2 



I.I 



1.0 

 0.9 

 0.8 

 0.7 

 0.6 

 0.5 

 0.4 

 0.3 

 0.2 

 0.1 

 



BELL SYSTEM TECHNICAL JOURNAL 



2.0 



2.8 3.2 



Cr = DISTANCE IN UNITS OF Sq (so=I.53 X IO-3.^^j 



Fig. 4 — Potential distributions of the C overlap type. 



