Yearly Variations of Terrestrial Phenomena and Solar Activities 19 



The ice-covered area in the Greenland Sea'^ shows a relation just 

 contrary or complementary to the case of Japanese typhoon. 



Rice crops iii NE. Japan and Hokhaido. With these crops^^ 

 the relation is quite similar to the case of the typhoon The 

 dependence upon d is very simple and conspicuous (Fig. 1(3). 



Wheat crop in Ohio, U. S. A. This crop^^ shows generally 

 minima in the years with small o, contrary to the case of Japanese 

 rice. 



Monsoon ram in hidia and Nile flood ."^^ These shows a similar 

 relation to each other and the division of the area of the spots- 

 faculae diagrams belongs to Type III. 



Number of fires due to Ughtenings, in Prussia. This numljer^^ 

 is minimum for the years with small o (Fig. 17). 



frequency of trade wind in Ajyia, Samoa.^^ This also shows 

 minima for small d. 



The examples may be added still further. It seems probable 

 that most of the periodicities of weather elements with the periods 

 of 3-5 years, hitherto investigated by many meteorologists, are 

 related to the rather irregular fluctuation of the solar quantity d 

 here called the specific hemispherical difference of activities. 



In conclusion, it must be remembered with an emphasis that 

 the years referred to in this paper as corresponding to the maxima 

 or minima of the meteorological element in question were deter- 

 mined sheerly with regard to the convexity or concavity of the 

 small portion of the time curve in the neighbourhood of the very 

 year, so that it may occurs oraetimes that the absolute value of a 

 minimum is greater than that of a maximum in other parts of the 

 curve. The irregular fluctuations treated in the present investiga- 

 tion which show so remarkable dependence on the quantity d are 



1) Met. Zs., 1917, p. 320. 



2) The data were taken from Prof. Okada's paper • On the the possibility of forecasting 

 the approximate yield of rice-crop for northern Japan, Journ. Met. Soc, 36, No. 11. The epoch 

 here utilized is 1886-1913. 



3) From T. A. Blair's paper in Monthly Weather Review, 47 (1919), No, 12. 



4) From the abstract given in Met. ZS., 1911. 



5) Ihid. 



6) Angenheister. loc. cit. 



