TR.I.\S.III..I.\IIC RADIO TELEPHONE TRANSMISSION 497 



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Monthly Averages Oiiirn.il Wirialion of Signal Field Strength 



Northolt, England (CKU) Measured at Belfast, Maine 



Corrected to 100 Amperes Antenna Current 



4,885 Km. 52,000 Cycles 



1924 



5,360 Km. 



Monthly Averages Diurnal V'ariation of Signal Field Strength 



Leafield, England (GBL) Measured at Riverhead, L. I. 



Corrected to .100 .-Xmperes Antenna Current 



1924 



24,050 Cycles 



