t> 



152 REPORT — 1895. 



each 10 miles by 10 iniles, commence at the top and I'un from left to right 

 down to the bottom of the same. 



A line drawn on the key map thi'ough the numbers in the sixth column 

 gives the boundary of tlie land surface which was shaken. The area 

 of this should be equal to the quantity in the second column. By com- 

 pleting, when it may be necessary, this outline seawards, a toUd area is 

 obtained, which is indicated by its major and minor axes in the second 

 catalogue. ' 



In tlie small map, which is a photographic reproduction of a map the 

 same size as the key map, the small dots indicate the position of all the 

 epicentral numbers, and the large numerals ranging from 1 to 15, districts 

 in which earthquakes are frequent. Distiicts 6 and 7 are bounded by 

 straight lines because there was not sufficient space in which to place all 

 the dots. For examjjle, in District 7 all the dots indicate earthquakes 

 which originated about the centre of this district. Until October 28, 

 1891, the disturbances in this district were not more numerous than they 

 are in District 8. 



When an earthquake has been felt at the extremities of the Empire, 

 and at the same time not along a great length of coast line, as in Districts 

 1 and 10, it is often difficult to determine the direction or distance from 

 the coast line of its origin. In these cases the assumption made lias been 

 that the shocks just reaching the coast have originated from about the 

 same locality as the larger shocks which have spread some distance along 

 the .shore line, these stronger disturbances being severe at places just 

 reached by their feebler successors. The signs + and — along the coast 

 line indicate that near these places there are evidences of secular elevation 

 or depression. This information was obtained by the help of Professor 

 D. Kikuclii, who kindly assisted in the distribution of a circular to vfadous 

 towns and villages round the coast of the Empire inquiring whether from 

 maps, traditions, or observations there wei'e reasons to believe that 

 changes had taken place in the relative position of the land and water. 

 The large black dots on the map indicate the positions of more or less 

 active volanic cones, in the neighbourhood of which there are huge bosses 

 of volcanic rocks and many ancient craters. The dotted lines show the 

 boundaries of provinces, which are usually the ridges of high mountains 

 dividing one seismic region from another. 



If analyses of this catalogue show that it is of any value, it is clear 

 that several advantageous changes may be made in a system for its con- 

 tinuation. As it stands it is only a tentative effort to provide investi- 

 gators with a new kind of data, which may lead to investigations not 

 hitherto possible. None of the facts, excepting a few of the time obser- 

 vations, claim any great degree of accuracy. The object of the list drawn 

 up for me by Dr. E. von Rebeur-Paschwitz is explained in the next 

 section. 



The long list of corrections, additions, and suggestions at the end of 

 the volume, inasmuch as they have, so far as possible, been inserted in the 

 second catalogue, almost entirely refers to the first catalogue. Although 

 they show that actual errors occur in work of this description, they also 

 f.how that from given data different persons may arrive at differejit results. 



' The unit is 10 geographical miles. 



