496 



BELL SYSTEM TECHNICAL JOURNAL 



20 



to 



6 ( 

 50 

 40 

 30 

 20 



5 10 



8:30PM 



50 



40 

 30 



irooPM 



50 



1 30AM 



4;00AM 



900PM 



700PM 



8 30 PM 



930PM 



1030PM 



irOOPM 



I2;30AM 



/^Aa^A- 



SEPT. 21,1934 



3:30AM 



4:00AM 



4:30AM 



5:00AM 5:30AM 



EASTERN STANDARD TIME 



Fig. 5 — Twenty-four hour run, vertically polarized 



