so 



BELL SYSTEM TECHNICAL JOURNAL 



increasing h. Quantitatively these relations are shown more clearly 

 and accurately by Figs. 6 and 7. 





.5 .6 



b 



i=R 



I.O 



1.1 



1.2 

 1.3 

 1.4 

 1.5 

 1.6 

 1.7 

 1.8 

 2.0 

 2.5= R 



1.0 



Fig. 6 



Correspondingly in Fig. 4 the curves of pb,o(R' > R) cross each 

 other rather diffusely in the neighborhood of ^ R = 1.2; thus, 

 pb,o(R' > R) changes sign in this neighborhood. pb.oiR' > R) is nega- 



* Except for values of b very nearly equal to 0; but in such cases Pb,o(R' > R) 

 is very small, so that the exception would be unimportant in most practical appli- 

 cations. A corresponding qualification applies, of course, to the discussion of Fig. 2 

 in the preceding paragraph. 



