VOL. XLVI.] PHILOSOPHICAL TRANSACTIONS. IO9 



Dates, N. S. Authors and Pages. Places. Dates, N. S. Authors aiid Pages. Places 



Mar. 18, 1750, J. EUicott 6i6, Portsmouth. Apr. 2, 1750, Rev. J. Seddon. . 696, Warrington. 



Dan. Wray, Esq. 6-i7, Mar. 8, 1750, Wm. Jackson 700, London. 



Mar. 8, 1750, Rev. Dean Cooper, 647, Hertford. Mar. 24, 1750, M. Mackenzie. . . 701, Smyrna. 



Mar. 18, 1750, Rev. Mr. Taylor, 6+9, Portsmouth. Sep. 30, 1750, Wm. Folkes, Esq 701, Newtown. 



Mar. 19, 1750, Benj. Cooke. .. . 6'51, IsleofWight Ja. Burrow, Esq. 702, Suffolk. 



Mar. 18, 1750, Jos. Colebrooke. . 652, Southampt Leicester. 



. . P. Newcome. . . . 6"53, Hackney Sir Tho. Cave. . . . 706, 



Ja. Burrow, Esq. 655, East Sheen J. Nixon 707, Norlhampt. 



Mar. 8, 1750, Tho. Burrat. . . . 681, Kensington Weston. 



Apr. 2, 1750, Rob. Paul 683, Chester 710, Warwick. 



Mar. 14, 1750, W. Bowman 6"84, Ea.Molesey Dr. Dodridge. . . 712, Northampt. 



Apr. 2, 1750, Mr. Pennant 687, Flintshire Steward of the Earl 1 Stamford 



Mar. 18,1750, Nat. Downe 688, Bridport. of Cardigan 721,/ 



May 4, 1749, Henry Baker 689, Winbourn Henry Green. . . 723, Leicester. 



July 1, 1747, Taunton. Aug. 23, 1750, M. Johnson. . .. 725, Spalding. 



Oct. 11, 1749, M.Reaumur. .. . 691, France. Sep. 30, 1750, Dr. H. Miles 726, Tooting. 



Feb. 9, 1750, Rev. W. Barlow. . 692, Plymouth Wm. Smith 727, Peterborough 



It is pretty generally agreed that the shocks lasted only 3 or 4 seconds of time. 

 On occasion of these earthquakes, the Rev. Dr. Wm. Stukely wrote his thoughts 

 on the causes of such phenomena. These are given at 3 different parts of this 

 N° viz. at p. 641, 657, 731 ; and were also printed and published by the author 

 in a separate pamphlet, in 1750, in 8vo. He rejects, he says, the common 

 notion of struggles between subterraneous winds, or fires, vapours, or waters, 

 heaving up the ground like animal convulsions ; but he always thought it was an 

 electrical shock ; which he is induced to think is the case, from several circum- 

 stances, which he notices. 



" We had lately, says Dr. S. a very pretty discourse read here, from Mr. 

 Franklin of Philadelphia, concerning thundergusts, lights, and like meteors. 

 He well solves them by"the touch of clouds, raised from the sea, which are non- 

 electrics, and of clouds raised from exhalations of the land, which are electrified : 

 that little snap, which we hear, in our electrical experiments, when produced by a 

 thousand miles compass of clouds, and that re-echoed from cloud to cloud, through 

 the extent of the firmament, makes that thunder, which afFrightens us. From 

 the same principle I infer, says the Dr. that if a non-electric cloud discharges 

 its contents on any part of the earth, when in a high electrified state, an earth- 

 quake must necessarily ensue. As a shock of the electric tube in the human 

 body, so the shock of many miles compass of solid earth, must needs be an 

 earthquake ; and that snap, from the contact, be the horrible uncouch noise 

 of it." 



Dr. Ste. Hales also, p. 66q, besides noticing the phenomena of the earthquake, 

 ventures on an opinion of the cause of such convulsions. " As to the affairs of 

 earthquakes, says he, particularly that which happened March 8, 1730, about 

 20 minutes before 6 in the morning ; I being then awake in bed, on a ground 

 floor, near the church of St. Martin's in the Fields, very sensibly felt the bed 



