18 Art. 6.— T. Terada : 



ed, we will not be surprised if similar relations were found with 



Fie;. 15. 



Fig. 16. 



respect to widely varying classes of meteorological phenomena. 



For instances, we may cite the following fragmentary results: 



Number of typhoons. The 

 number of conspicuous 

 typhoons recorded in the Cen- 

 tral Meteorological Observa- 

 tory of Tôkyô'^ during 1887- 

 1916 was treated similarly- A 

 very conspicuous result was 

 obtained that the maxima 

 of the number occurs when d 

 is small, except for the years 

 with very small solar activity, 

 N+S, in which case the 

 minima seem to prevail (Fig. 

 15). 

 Fig. 17. Ice in Oreenland Sea. 



1) The data were kindly placed at my disposal by Mr. K. Saki of the Central Met. Obs., 

 to whom my best thauks are due. 



