( 516 ) 



The variation of the corresponding magnetic component changed 



its nature pretty much (as was to be expected) during these months. 



The earth-current reall}^ followed this variation whilst the maxima 



and the minima kept preceding those of the magnetic component. 



Out of the average for the 4 months this is obvious. 



7 8 9 10 11 Midnight 12 3 4 5 

 Earth-current 0-27-25-29—17 12 20 28 26 —14 



Volt. p. KM. X 10-6 



