TH.ixs.ii i.iMic A'. //>/() ii:i.i:rii<>\i-: /a-./.v.vu/.v.s/o.v 495 



Al'I'KN'DIX 



rr,ins.ill.iMtu- K.iilio IVlcphdiu- MtMsiirriiuiits 

 19^,?, l<)->4, 1925 



Month liy Month Record of Noise and I'ield Strength 



Monthly AveraRes of Diurnal Variation of Signal Field Strength 



Kotky Point, L. I., U. S. A. (WQL) Measured at New Southgate, England 



Corrected to 600 Amperes Antenna Current 



5.480 Km. 17,130 Cycles 



April, 1923— Feb., 1925 



Monthly Averages of Diurnal Variation of Signal Field Strength 



Marion, Mass., U. S. A. (WSO) Measured at New Southgate, England 



Corrected to 600 .Amperes Antenna Current 



5,280 Km. 25,700 Cycles 



Aug., 1923— Feb., 1925 



