ON THE VOLCANIC PHENOMENA OF JAPAN. 



427 



Considering March, April, and May as Spring, and the following 

 three groups of three months respectively, Summer, Autumn, and Winter, 

 the distribution of shocks according to these seasons has been as follows : — 



The distribution of earthquakes in relation to the cold months and 

 warm months has been as follows : — 



The following table gives the distribution of 658 earthquakes accord- 

 ing to hours : — 



