14S 



BELL SYSTEM TECHNICAL JOURNAL 



where Z{u) denotes the function enclosed by the brackets in the first equa- 

 tion and the expressions for g"/g and ^ in (8.2) have been used in the replace- 

 ment of (1 — u^)k. 



Table 4 

 Values of PF3(/)/(47rV) 



Inserting (8.10) in the expression (8.4) for Q,{t) and taking the Fourier 

 transform (8.5) leads to 





_ .-''^2 



__ (1 - O 



.2^ 



-/2/(2<r2) 



P cr\/27r 



W6(f) = 4Ta f Z(u) cos (uf/a) du 



(8.11) 



