76 C. Davison — The Comrie Earthquake. 



On the 12th of last July, at about 7.40 a.m. (G.M.T.), a slight 

 but undoubted shock was felt at Comrie and for a few miles around. 

 Houses are unfortunately somewhat widely scattered in the district, 

 and it has been difficult to collect as many records as could be 

 desired. I have succeeded in obtaining only 21 observations from 

 19 different places, and even this number would have been smaller 

 had it not been for the kindly assistance of Mr. T. Boston, of 

 Balmuick, who supplied me with the names of several observers, 

 and also with three or four records of considerable value. In 

 addition to the above places, I have received information from 17 

 others, where, so far as is known, no trace of the earthquake was 

 perceived. These are of some assistance in drawing the boundary 

 of the disturbed area, though less than is usually the case, either 

 on account of their outlying position or of the small number of 

 inhabitants they contain. 1 



On the accompanying map (Fig. 1), a small disc with a cross 

 through it indicates that the shock was felt and the sound heard, 

 a small circle with a cross that the sound was heard but the shock 

 not felt, a cross that the sound alone was observed, and a circle that 

 no trace of the earthquake was perceived. 



The continuous line represents the isoseismal line corresponding 

 to intensity III of the Rossi-Forel scale. The area enclosed by it 

 is 5^ miles long, 4^ miles broad, and contains 18^ square miles. 

 Its centre lies ^ mile south-west of Comrie, or half-way between 

 Ross and Dalginross. 



Outside this line the shock was certainly felt at two other places, 

 at Easter Ballindalloch very slightly, and rather more strongly at 

 Westerton. At several other places outside the isoseismal III the 

 sound only was observed. This was the case at Braefordie, Carro- 

 glen, Glenturret Lodge, Wester Dundern, and Easter Dundern, but 

 at the last-named place, it should be mentioned, the observer was at 

 Avork in the open air, and therefore in a most unfavourable position 

 for detecting a weak tremor. Similar observations to the south of 

 the disturbed area are not forthcoming, but it is clear that, to the 

 north and west at any rate, the sound-area overlapped the disturbed 

 area. 



1 Authorities. — Aberuchill, Mr. M. M'Intosh ; Ardvorlich, Col. J. Stewart; 

 Auehnafree, Mr. A. Eichards ; Balmuick, Mr. T. Boston ; Bishopsi'auld, Mr. T. K. 

 Robertson ; Braefordie, Mr. J. Stewart ; Carroglen, Mr. T. Boston ; Clathick, 

 Capt. W. C. Colquhoun; Comrie, Mr. S. Campbell, Rev. W. Hall, Rev. A. C. 

 Watt; Culty-Craggan, Mrs. Finlayson ; Crieif, Mr. G. Straithairn ; Dalehruin, 

 Mr. W. Cairns ; Dalchonzie, Miss jS. T ewbio-giug ; Easter Palliudalloeh, Mr. J. 

 Campbell ; Easter Dalginross, Mr. D. "W. Kemp ; Easter Dundern, Mr. P. 

 M'Laren; Fairness, Mr" AY. Bell; Foulis, Rev. T. Hardy; Garricbrew, Mr. J. 

 McLaren; Gilmerton, Rev. G. Henderson; Glenamp'le, Mr. T. Walters; 

 Glenturret Lodge, Mr. T. Boston; Innergeldie, Mr. J. Craig; Laggan, Mr. D. 

 Ewiug; Lawers, Col. D. R. "Williamson; Little Port, Mr. J. Morrison; 

 Loclierlour, Mr. S. Campbell; Madderty, Rev. L. C. M. Wedderburn ; Ross, 

 Mr. R. M'Laren; St. Fillans, Rev. ' T. Armstrong : Tyghnablair, Mr. P. 

 M'Intyre; Tomanor, Mr. A. McXaugbton ; Wester Ballindallocn, Mr. T. Boston; 

 Wester Dundern, Mr. P. M'Ara ; Westerton, Mr. D. Keith Murray.— I beg to 

 offer my hearty thanks to the above ladies and gentlemen, and also to Mr. J. 

 Robertson, of Coupar Angus, who kindly sent me early notice of the occurrenc 

 of the earthquake. 







