536 Dr. C. Davison — Britiuli Earthquahes. 



Sept. 26, 11.40 a.m. Inverness. 

 Sej^t. 27, 1.47 p.m. Inverness. 

 Sept. 28, about 4 a.m. Inverness. 

 Sept. 29, 9.6 p.m. Inverness. 

 Sept. 30, 3.39 a.m. Inverness. 

 Oct. 1, about 4.35 a.m. Inverness. 

 Oct. 6, 4.24 a.m. Inverness. 

 Oct. 13, 4.24 p.m. Inverness. 

 Oct. 22, about 10.15 a.m. Inverness. 

 Nov. 15, about noon. Inverness. 

 1902.— April 13, about 11.50 a.m. Ilessle (East Yorksbire). 



Oct. 14, 5.15 p.m. Strontian (Inverness-sbiie). 

 1903. — Mar. 24, 1.30 p.m. Derby (principal earthquake). 



,, about 1.45 p.m. Derb}'. 



,, about 5 p.m. Derby. 

 May 3, 9.22 p.m. Derby. 

 June 19, about 4.25 a.m. Carnarvon. 



,, 10.4 a.m. Carnarvon (principal earthquake). 



,, 10.9 n.m. Carnarvon. 



,, 10.12 a.m. Carnarvon. 



,, 10.16 a.m. Carnarvon. 



,, 11.8 a.m. Carnarvon. 

 June 21, 8.6 a.m. Carnarvon. 

 July 1, 1.16 a.m. Bala. 



The four series of earthquakes, including 34 out of the 37 shocks 

 recorded, have been described in the following papers : — 



"The Carlisle Earthquakes of July 9th and 11th, 1901 " : Quart. 

 Journ. Geol. Soc, vol. Iviii (1902), pp. 371-376. 



"The Inverness Earthquake of September 18th, 1901, and its 

 accessory shocks " : ibid., pp. 377-397. 



" The Derby Earthquakes of March 24th and May 3rd, 1903 " : 

 ibid., vol. Ix (1904), pp. 215-232. 



" The Caernarvon Earthquake of June 19th, 1903, and its accessory 

 shocks " : ibid., pp. 233-242. 



The other three shocks, together with some doubtful or spurious 

 earthquakes, form the subject of the present paper. A few earth- 

 shakes in mining districts (at Camborne on June 4 and 10, 1902, 

 and Barnsley on October 25, 1903) will be described shortly in 

 a separate paper. * 



Hessle Earthquake : April 13, 1902. 



Time of occurrence, about 11.50 a.m.; intensity, 4; centre of 

 isoseismal 4 in lat. 53° 334' N., long. 1° 11-5' W. ; number of 

 records, 34, from 28 places, and 77 negative records from 76 

 places. (Fig. 1.) 



Hessle lies on the north shore of the Humber, about 4 miles west 

 of Hull. As a rule, the shock was felt only in villages, and, as it 

 occurred on a Sunday during the morning service, I have found 

 it difficult to obtain many records. The only isoseismal that can 

 be drawn is that which corresponds to the intensity 4 (Fig. 1). 



