480 

 where 



/(O = -, + 



BELL SYSTEM TECHNICAL JOURNAL 



n J 

 1 S 



COO 



r r 



+ \ 



+ 



3 325 32527 3252729 

 1 /r\2 



+ - 



.Cio - i20YJ2l I 2 y + ^'•■"'213! V 2 



1 / cV 



S40 



3!4! V 2 



+ - 



1!2!\2/ ^2!3!V2 



/(")(,) = 



the 71 being an even integer. 



The inverse powers of c all cancel out, in equation (B), and there 



