Dr. a Davison— British Earthquakes, 1893-99. 107 



difficulty is seldom encountered, and the failui-es are generally due 

 to the confusion caused by the rather rapid succession of the shocks. 



The number of earthquakes more or less briefly described in this 

 paper is 19, and, with few exceptions, I have not been able to 

 correlate them with known faults. It should not be inferred from 

 this that the shocks owe their origin to some other cause than fault- 

 slipping ; for, in nearly every case, the epicentral region is one in 

 which it is difficult to detect faults. It is possible, indeed, that the 

 careful study of an earthquake may form a useful supplement to 

 the methods which are at the disposal of the field -geologist. 



Exjjlanation of Map-Si/mbols. — In a weak earthquake, every place 

 of observation can generally be marked on the map ; and, without 

 making use of a wide range of symbols, it is convenient to employ 

 signs to represent the perception of the shock and sound. In all but 

 one of the following maps, a square indicates that the shock was 

 felt, a triangle that no mention is made of the shock or that its 

 perception was doubtful, and a circle that no shock was felt. A 

 figure entirely filled in denotes that the sound was heard, one half- 

 filled in that no mention is made of the sound or that its perception, 

 was doubtful, and one not filled in at all that no sound was heard. 



List of Earthqualces, 1893-1899. 



1893, Jan. 2, 7.20 p.m. Glen Garry. 

 Aug. 3, 6.41 p.m. Leicester. 



Nov. 2, 5.45 p.m. Pembroke (principal 



earthquake). 



„ 6.1 p.m. Pembroke. 



,, about 6.15 or 6.20 p.m. Pembroke. 

 Nov. 3, about 1 a.m. Pembroke. 

 Dec. 11, about 3 p.m. Glen Garry. 

 Dec. 30, 11.20 p.m. Somerset. 

 Dec. 31, 12.28 a.m. Somerset. 



,, about 4 a.m. Somerset. 



1894, Jan. 12, about 11.55 p.m. Fort William. 

 Jan. 23, about 9 a.m. Exmoor. 



Jan. 25, 1.7 p.m. Glen Garry. 

 March 8, about midday. Annandale. 

 May 14, in the afternoon. Annandale. 

 July 12, about 11 p.m. Comrie. 

 Sept. 18, 10.10 a.m. Glen Garry. 



1895, Jan. 9, about 5.45 a.m. Fort William. 

 July 12, about 7.40 a.m. Comrie. 

 Aug. 27, about 12.30 p.m. Cornwall. 



1896, Jan. 26, 6.50 a.m. Cornwall. 

 May 29, 4.47 a.m. Annandale. 



June 5, early in the morning. Glen Nevis. 

 Dec. 16, about 11.0 or 11.30 p.m. Hereford. 

 Dec. 17, „ 1 a.m. Hereford. 



1.30 or 1.45 a.m. Hereford. 



