Jour. Sc. Coll. Vol. XI. PI. XXVI. 



I I 



jn I 



Fig. 1. Monihly Distribution of 216 

 Destructive Eqkes in Japan.. 



œ = MbnÜL. 



y = Monthly number of desinüdv/e eqkes. 



Fig. 2. Monthly Distribution of Ordinary 

 Small Eqkes in Japan, . 



ac = Month . 



y r=. Mean monthly nutnhcr of ordinaty small eqties. 



