42 



Art. 9.-T. Terada 



Takle VI. 



The numbers are given in % of all cases for each season, 

 denotes the cases where J-V and J Y are nearly parallel to each other, 

 denotes the cases where JX and Ji' are nearly inverted to each other. 



It will be seen that the number of cases with the phase 

 difference zero attains a maximum in the early hours of morning, 

 while that with the phase difference tz shows a maximum in the 

 evening (Fig. 14). 



Secondly, those cases w^ere chosen where either the one, 

 X- or Y-component, is alone conspicuous, while the other is 

 quite insignificant. The distribution of these special cases in 

 different hours is given in Table VII. and plotted in Fig. 15. 



