CHARACTERISTICS OF TOLL TELEPHONE CABLES 



329 



In these formulas 



2 UqVo — UqVo 

 tlQ + Vq 



Wn = 



UnVn 



UnVn 



2 I 2 



Mn-1 + »n-l 



r> 2 I 2 

 AQ ^<1 + «1 



/> Mo + »0 



(12a) 

 (13a) 



Fig. 29 — Values of functions 



4^ 

 6X« 



and 



The curves of figures 28-30 show the auxiliary functions vs h and figure 27 

 the correction factor K. The dotted curve for K is computed from Mie's 

 formula^^ (14a) for small h. Two values of 2k are shown, .75 and .50, 

 respectively. 



G. Mie^^ gave formulas for small and large values of h, as follows: 



For small h, 



18 G. Mie, Annalen der Pkysik, Vol. II, (1900) pp. 201-249. 



