316 s. SEKIYA : 



to be 2)ublislied before long in the reports of the Earthquake 

 Investigation Committee. 



The scale of intensity of earthquake motion adopted in the 

 Catalogue is as follows : 



(1) small or slight earthquahes, in which the motion was 



weak, and which caused neither alarm nor damage ; 



(2) strong earthquakes, in which the motion was sufficient- 



ly sharp to cause people to run out of doors and to 

 produce slight damage, such as tlie overthrowing of 

 furnitures, small cracks in walls, ishigaki (masonry 

 walls), embankments, etc ; 



(3) great or destructive earthquahes, in which the ground 



was cracked, buildings greatly damaged, lives lost, etc. 



In the Cataloo'ue these three classes are severallv distin- 

 guished by the Roman numerals, I, II and IIP. 



There exist in some cases more or less complete records of 

 the after-shocks of great earthquakes. In the Catalogue, how- 

 ever, all these shocks have, for the sake of simplicity, been 

 excluded, in so far as they could be ascertained to be such. 

 Again, volcanic eruptions and sea-waves are not given, unless 

 when accompanied b}^ earthquakes. The catalogues of these 

 two natural phenomena in Japan shall form the subjects of 

 future work. 



The only other general catalogue of historical Japanese 

 earthquakes is that given by the late Mr. H. Okajima in his 

 *' Nippon Saiishi," or Ä History of unusual natural phenomena in 

 Japan,- whicli includes 1368 earthqukes and was compiled from 

 213 different works of reference. Lastly, I may also call atten- 



1) See also ?? 2, 3 and 4 of tlie next paper. 



2) Printed in 1894, after the death of Mr. Okajima. 



