252 BELL SYSTEM TECHNICAL JOURNAL 



the properties are of importance and the desired approximations close, 

 we are led to networks which, while formally simple, involve corre- 

 spondingly numerous natural frequencies. On the other hand, if the 

 impedance, or the phase, or the loss property be subordinated in 

 respect to the others, suitable modification of the analysis allows the 

 remaining properties to be realized with simplification of the structure. 



