PL XXIII. 



Map showing the diiitribution of the origins of the eai-thquikcs registered at Tokyo 

 m Sept., 1923, and of the principal aftershocks of later occvarenoe. 



Each ciriile with iinmorical suffix iudicalus 

 th.j unrthHuuke i., Table V 



Each dot ithout suffice iudjentos tbo anithrinjiko with its 

 tensity as follows : - 



* Bltgbt, • mcMlonite,* BtruDg- 



