_l — i 



V • I. * • 



rr.irTi !...< o( No. l<> II 174 63 sides cxirciltd l>y v.iriniii |mti nitaKC* 

 of circuits ut 20(X) cyclta 



Sniuoth curve — theoretical 

 O 46-11- 174-6,? sides I'ittsburKh to l.iKciiier 

 H li-ll-l 74-63 sides l.igonier to Pittsburgh 

 ^ S2-H-1 74-106 sides Pittsburgh to Ligonier 



60 

 55 



50 

 45 



D 40 



t- 



J, 35 

 in 

 3 30 



z 

 a 25 



15 



to 



5 



° (0 20 30 40 50 60 TO 80 90 100 

 Percent of Circuits 

 Fig. II 



Kcturn loss of No. 19-H-I74-63 phantoms exceeded by various 

 percentages of circuits at 500 cycles 

 Smooth cur\'e — theoretical 

 © 25-H-174-63 phantoms Pittsburgh to Ligonier 

 r*1 21-H-174-63 phantoms Ligonier to Pittsburgh 



60 



55 

 50 

 45 



40 

 T 35 

 S 30 



I- 20 

 kJ 



■^ .5 

 10 

 5 



° 10 20 30 40 50 60 70 80 90 100 

 Percent of Circuits 

 Fig. 12 



