4 8-4 



BELL SYSTEM TECHNICAL JOURNAL 



= -i. 



+ 



V2 



yj^^^ j ™s2^g2 -^(^j COS 6^56+ - ••• J 



-^, ( 0'sin 40-54 - 4^ ( 2'y-i" «^-^s +-•••] 

 r cos 6 , r^ cos 36 r^ cos 56 , , 1 



— r-^^^ + ^^5-^^^' - ":;^5^^^^ - + + •••] 



~ 2 2!l! ( ^"'' "^^ ( ^''^' + ^' '""^ Vr ) 

 Equations (C) are now got by writing r = riVM, w?^ = ^u^+^-^'^^g^ and 



4 = Wz(cOx - log. tVm) + m'+^^/^'S:, 



log« 7 = 0.5772157. 



