18 



Art. 1.— T. Terada: 



Fig. 8. 



Observed and calculated values of the amplitude aj 

 and the phase ^i of the diurnal component, as depending 

 on the longitude. 



• • • observed. 



— X — X — X — calculated. 



S^l 



360 



180 



Ol 



ai 



180W 



180E 



