CHARACTERISTICS OF TOLL TELEPHONE CABLES 



307 



10 20 30 4-0 50 60 70 80 7o '00 "0 120 



TEMR- DEGREES FAHR. 



Fig. 9 — Capacitance per mile vs. temperature — 19 gauge pairs 



shown is at 100 kc. and amounts to about 6 per cent increase for 120 degrees 

 increase in temperature. 



