222 



BELL SYSTEM TECHNICAL JOURNAL 



10000 



9000 



8000 



2. 7000 

 O 



O 

 O 

 O 



6000 



5000 



U 

 O 



z 



< 4000 



< 



o 



. 3000 



o 

 < 



2000 



1000 



95 

 ^^85 



65 



5 6 7 8 



TIME IN DAYS 



Fig. 4 — A-C. capacitance of 50 feet of twisted pair 22-gauge wire insulated with 

 double servings of equal thickness. 



