190 PKOCEEDINGS OF THE GEOLOGICAL SOCIETY. [NoV. 3, 



Here, shortly after eight o'clock, my attention was withdrawn from 

 the writing upon which 1 was engaged by a low rumbling sound, 

 which lasted for a few seconds ; and, like many others, I thought 

 that an explosion had taken place at the Powder Mills. I did not 

 feel any motion ; but at the next house but one the vibration was 

 so great as to make the china rattle and cause alarm. At other 

 houses chairs were moved and the candles were observed to oscillate ; 

 and china, windows, and doors were shaken. A person who was at 

 the time attending service at the Wesleyan Chapel informed me that 

 he heard a noise that was not like thunder, and he did not know 

 what it was like, — ^that it was first at his back, then seemed going 

 by the side of the chapel, and then it came in at the windows at 

 the end : this gives the direction of the shock as from E.S.E. to 

 W.N.W. 



At Teigncombe, a hamlet about two miles to the west of Chagford, 

 and close to the open moor, a sound and vibration were noticed, and 

 cups and plates on a dresser rattled. Between Chagford and Drews- 

 teignton, at Sandy Park and Dogamarsh Bridge, on the granite close 

 to the edge of the Carbonaceous rocks, the same sound was heard. 

 A person described it as coming from Drewsteignton, and then 

 passing on towards Kestor Kock, — that is, nearly from N.N.E. to 

 S.S.W., and then turning to the west. At Cheriton Bishop, on the 

 Carbonaceous rocks, between Drewsteignton and Crediton, about 

 three miles from the former and five from the latter, no sound nor 

 motion was heard on the 28th ; a motion of the earth and sound 

 were, however, noticed there and at Pingle Bridge over the Teign, 

 contemporaneously, about the commencement of September. 



At Drewsteignton, on the Carbonaceous rocks and near to the 

 edge of the granite, a loud rumbling noise was heard on the 28th 

 Sept., and some houses were so much shaken that the inhabitants 

 ran out in alarm. At the nearly adjoining villages of Eamsleigh, 

 South Zeal, and Sticklepath, about five miles to the west of Drews- 

 teignton, on the Carbonaceous rocks, there much intersected by trap- 

 dykes, and closely adjoining to the granite, the shock seems to have 

 been felt more severely than anywhere else. The time of its 

 occurrence is stated as 7.45 p.m. Chairs shook ; china, windows, 

 and doors rattled ; and a dull rumbling sound was heard, which 

 alarmed the inhabitants, as "it was not Uke thunder." The shock 

 is there estimated to have lasted 15 seconds. At the neighbouring 

 vUlage of South Tawton the sound was heard ; but I have not been 

 informed whether any vibration was felt. At Spreyton, also on the 

 Carbonaceous beds, three miles to the N.W. of South Tawton, neither 

 sound nor vibration was perceived. At Okehampton, on the Carbo- 

 naceous rocks, the occurrence is described as a kind of rushing sound, 

 or an undulation of sound and motion, considered by the majority 

 of persons as going from east to west; and windows, doors, and 

 chairs were shaken. 



On the western side of Dartmoor, at a farm distant about two 

 miles, and " The Fox and Hounds " distant about seven miles, from 



