Chas. Davison — British Earthquakes, 1891. 



301 



Treneglos. — Two stocks felt, separated by an interval of about 

 fifteen seconds, no vertical motion perceptible. 



Intensity. — The intensity of the shock was at IV. at the following 

 places :^ Altarnon, Boscastle, Camelford, Poundstock, St. Clether, 

 St. Juliot, Tintagel, Treneglos, Victoria Inn (near Davidstow) and 

 Warbstow ; and less than IV. at Bolverton, Five Lanes Inn (near 

 Altarnon) and Michaelstow. 



fOUNDSTOCK 

 LEAN - 



ECLOSKERRy 



FIVE UNES INW 



I 



/ 



SCALE OF MILES 



Sound-phenomena. — With three exceptions (Altarnon, N. Penlean 

 and Victoria Inn) earthquake-sounds are recorded at all the places 

 of observation, and the omission at these places is probably acci- 

 dental. The sounds were heard at all the places which determine 

 the boundary of the disturbed area. They were also, I am informed 

 heard two miles to the east of Bolverton, so that it is possible that 

 the sound-area may have slightly overlapped the disturbed area 

 towards the south-east. Otherwise the two areas seem to have 

 coincided approximately. 



The sound is said to have preceded the shock at Michaelstow, to 

 have accompanied it at Bolverton, Boscastle, Camelford, Jacobstow, 

 St. Clether, St. Juliot and Treneglos, and to have preceded, accom- 

 panied and followed it at Poundstock. 



. At Boscastle, Dr. Wade informs me that the sound resembled that 

 of a ponderous waggon going over a vacuum. It was heard while 

 the shocks lasted and during the whole of the interval of about ten 



