204 



BELL SYSTEM TECHNICAL JOURNAL 



ao 



o 10 



1.2 1.3 



RATIO = 



1.4 1.5 1.6 1.7 



MAXIMUM WIND VELOCITY 

 S-MINUTE AVERAGE WIND VELOCITY 



Fig. 6 — Frequency distribution of the ratios of maximum instantaneous velocities to 

 five-minute average velocities as recorded by the Burton anemometer. 



Method of Treating Data 

 The data considered necessary for the characterization of any pair 

 arrangement were: 



1. The number of contacts. 



2. The simultaneous velocity and direction of the wind. 



3. The sags of the wires. 



4. The air temperature (because of its effect on wire sag). 



5. The weather, particularly the presence or absence of glaze. 



