On the Leicester Earthquake of August 4, 1893. 91 



lasting about two seconds, not followed by tremulous motion, in- 

 tensity nearly 5 ; the beginning of the sound coincided with that of 

 the shock, it began abruptly, and died away a second or two before 

 the end of the shock. The most interesting point brought out by 

 these observations is that, as the earth-wave radiated from the centre, 

 the sound apparently outraced the shock, leading at first sight to the 

 conclusion that the velocity of the sound was greater than that of 

 the shock. Tn a later section it will be seen, however, that such a 

 conclusion would be incorrect. 



(6.) Accounts from places within the isoseismal 5 : Mount St. 

 Bernard's Abbey, prominent vibrations, followed by tremulous motion, 

 duration about five seconds ; the beginning of the sound slightly 

 preceded that of the shock, the end of the sound followed that of 

 the shock by at least three or four seconds. Sheepshed, the vibra- 

 tions gradually increased in intensity and then died away, duration 

 about seven seconds ; the beginning of the sound preceded that of 

 the shock by about two seconds, the end of the sound followed that 

 of the shock by about two seconds, the sound loudest at the time 

 when the vibrations were strongest. Markfield, prominent vibra- 

 tions, preceded and followed by tremulous motion, duration about 

 five seconds; the beginning of the sound slightly preceded that of 

 the shock, the end coincided approximately with that of the shock, 

 the principal vibrations felt at, or immediately after, the instant 

 when the sound was loudest. Thus, at places close to the epicentrum 

 the sound generally overlapped the shock 'at both ends, and there 

 was little or no interval between their epochs of maximum intensity. 



(c.) Accounts from places between the isoseismal 5 and the south- 

 east end of the major axis : Humberstone, principal vibrations for 

 three or four seconds, strongest near the beginning, followed by 

 tremulous motion for two or three seconds, intensity 4 ; the begin- 

 ning and end of the sound coincided approximately with those of the 

 shock. Harringworth, tremulous motion, followed by principal 

 vibrations, intensity 4 ; the beginning of the sound preceded that of 

 the shock, the ends of both coincided, the principal vibrations felt 

 after the instant when the sound was loudest. Barton Segrave, the 

 sound, a deep loud rumble, lasting four or five seconds, seemed to 

 cease as th'e vibrations began ; these were strongest near the middle, 

 and lasted about five seconds, intensity 3. In this direction also, 

 then, the sound apparently outraced the shock. 



2. Sutton (near the north-east end of the minor axis), one series 

 of vibrations, strongest towards the end, duration five or six seconds, 

 intensity 3 ; the beginning of the sound preceded that of the shock 

 by two or three seconds, the end followed that of the shock, the 

 principal vibra.tions felt when the sound was loudest. Barwell (near 

 the south-west end of the minor axis), principal vibrations for about 



