ON SEISMOLOGICAL INVESTIGATION. 



81 



In very many of these entries there must be errors, the reasons for 

 the existence of which have already been explained. The values of these 

 vary between a fraction of a minute and several minutes. 



Where origins are known from observations made near to the same 

 these are stated. 



The geographical positions of these origins are shown in map (Plate II.). 

 Some of the entries on this, particularly those for the Atlantic and 

 Indian Ocean, are conjectural, whilst others may be taken as correct. 

 The reliance which can be placed upon any particular determination is 

 shown in the table of time intervals on which the same is founded. 



263. This earthquake, which is described in the British Association 

 Eeport, 1899, p. 212, and was recorded in Tokio at Oh. 59m. 29s. G.M.T. 

 March 7, is of interest as showing that the amplitudes of motion recorded 

 at Shide and Kew were greater than those recorded at Toronto, whilst at 

 Victoria, the nearest station to the origin, but reached by a sub-oceanic 

 path, it was the smallest of all (see p. 70). 



Other earthquakes, approximately corresponding to entries in the 

 Tokio register, and which may therefore have originated near to Japan, 

 are Nos. 271, 286, 314, and 363. Noa. 351 and 352 may have originated 

 to the east of Japan, about 40° N. lat. and 160° E. long. 



347. Dr. J. P. van der Stok in the ' Kon. Akad. van Wettenschappen 

 te Amsterdam,' Nov, 25, 1899, tells us that in the night of Septem- 

 ber 29-30, at 1.45 a.m. (September 29, 17h. 9m. G.M.T.), an earthquake, 

 followed by sea waves, damaged the south coast of Ceram, and, in less 

 degree, the islands of Ambou, Banda, and the Ulias Isles. Several 

 villages on the south coast of Ceram were destroyed — in Elpapoeti Bay 

 all except two. The prison at Amahei was completely destroyed, and the 

 fortifications partly so. 



Dr. R. D. M. Verbeek gives an account of this earthquake in the 

 1900. G 



