TK.IXS.ll l..l\l/C A'.//)/() t El.l.l'lli>SI- I R.IXSMISSIOX 4W 



Monthly Averanc of Diurnal X'ariation of Signal Field StrenRth 



Northolt, EnRland U-KHi Muasured at Green Harbor, Mass. 



Corrected to KK) Ani|)crcs Antenna Current 



Km. 54,500 Cycles 



Aug., 1923— Jan., 1924 



Monthly Averages of Diurnal Variation of Noise 



New Southgate, England 17,000 Cycles 



April, 1923— Feb., 1925 



