030 



BELL SYSTEM TECHNICAL JOURNAL 



0.1 



0.07 



0.05 



(O 0.04 



5 

 I 

 O 0.03 



LlI 



Z 0.02 



z 

 < 



I- 



10 



_i 0.01 



< 



D 



D 0.007 



2 



0.005 



20 30 50 100 200 300 600 



HORIZONTAL SEPARATION IN FEET 



Fig. 2 — Cross Keys tests — mutual resistance. 



1000 



0.7 



0.5 

 0.4 



0.3 



0.01 



0.007 



0.005 



20 



30 



50 100 200 300 



HORIZONTAL SEPARATION IN FEET 



Fig. 3 — Cross Keys tests — mutual reactance 



500 



1000 



