PROCKEDINGS OF THE COTTESWOLD CLUB 19I 



5h. 34m. a.m. Mr Madan estimates that the whole 

 occurrence was comprised within the Hmits of 5h. 32m. 

 and 5h. 32m. 45s. a.m. Other records vary from 5h. 29m. 

 to 5h. 40m. a.m., a difference of II minutes. This may 

 partly be accounted for by inaccuracies of clocks, certainly 

 not by the progressive movement of the earthquake wave 

 past the places of observation, for these tremors are 

 calculated to have travelled at the rate of thirty miles per 

 minute. 



4 a.— THE NATURE OF THE SHOCK 



The bulk of the evidence appears to show that the 

 principal vibrations were not preceded by any tremulous 

 motion, at least, the latter was not noticed, owing possibly 

 to the fact of its not being sufficiently strong to arouse 

 the sleepers. One observer, however, Mr Mellersh, who 

 was awake at the time, states that "the shock began with 

 a distinct tremulous motion, which merged into prominent 

 vibrations, increasing in intensity and then dying away." 



Neither is there anv record of such tremulous motion 

 having been felt after the principal shock, though there is 

 a general agreement as to the gradual increase in the 

 intensity of the shock. Mr Helps states that " the shocks 

 increased to a maximum, the final vibrations being shorter, 

 and hardly, if at all, less intense than the maximum." 



Dr Ringer says that " the movement gradually increased 

 in intensity and then died awa}^ the principal vibrations 

 being strongest near the middle of the series." 



Sir Brook Kay considers that " they were more violent 

 towards the end." 



Mr Madan states that " there were at least two maxima of 

 vibration, one dving away and followed almost imme- 

 diatelv by another, which latter was the most violent of 

 the two." 



