172 Br. a Davison— British Earthquahes, 1893-99. 



persons to distant thunder, and by one each to a cart coming up the 

 road, to coals turned out of a cart, and to a distant quarrj'-blast. 



The boundary of the sound-area is represented on the map (Fig. 5) 

 by the continuous line ; but, on account of the small number of 

 observations, it cannot be regarded as very accurate, especially to 

 the east of Clathick. The area, as drawn, is 3f miles long, 3 miles 

 broad, and contains 9 square miles. Its centre is one mile E. 27° N. 

 of Comrie. 



Connection loith the Earthqualces of 1S94: and 1895. — The epi- 

 centres of all three earthquakes lie on the north-west side of the 

 great fault, whose course is indicated by the broken lines on the 

 map. The dotted line represents the isoseismal 3 of the earthquake 

 of 1895. As we have seen, the epicentre of the 1894 earthquake was 

 close to Comrie ; in 1895, the epicentre must have been a mile or 

 more in length, with its middle point a quarter of a mile south-west 

 -of Comrie. Thus, while the first two earthquakes originated in 

 nearly the same region of the fault, the slip which caused the earth- 

 quake of 1898 took place at a spot about a mile further to the north- 

 east, and apparently just outside the focus of the preceding shock. 



As the epicentres must lie on the side towards which the fault 

 hades, the three earthquakes agree in showing that, near Comrie, 

 the hade is to the north-west. 



Glen Garry Earthqualce : Dec. 18, 1899, 



As the records for these and preceding years have shown, slight 

 earthquakes are not uncommon in the west of Inverness-shire, in 

 Glen Garry and the tributary glens, but none seem to have been 

 felt for more than five years, between Sept. 18, 1894, and the above 

 <3ate, when a stronger shock than usual occurred. It was felt at 

 about 6.50 a.m. at Glenquoich, Glenkingie, Lochournhead, Carnich, 

 and even as far as Corran (Arnisdale, in Glenelg), but the limits of 

 the disturbed ai"ea cannot be ascertained owing to the scanty 

 population of the district. On the south side of Loch Quoich the 

 intensity of the shock was about 5. At Glenquoich a sound was 

 heard like distant thunder, getting louder till the house trembled, 

 and then the sound died away as if a carriage had passed ; the sound 

 lasted fully 17 seconds. In a neighbouring part of the glen, the 

 sound was compared to a chimney on fire and afterwards to a veiy 

 heavy carriage passing over an iron bridge, and at Glenkingie to 

 a flock of sheep rushing over hard ground. 



For the notices on the Glen Garry earthquakes described in this 

 paper I am indebted to the kindness of Mi*. D. Grant, of Glenquoich, 

 Mr. A. M. G. Foster, of Glenkingie, and Mr. M. Matheson, of 

 Ardochy, three verj' careful observers, who for many years have 

 paid close attention to the subject. The value of their work can 

 hardly be overestimated. 



Doubtful and Spurious JEarlhquakes. 



Monmouthshire, etc. : Jan., 1893. — In two letters in Nature 

 (vol. xlvii, 1893, pp. 247, 270), Mr. E. J. Lowe, F.K.S., describes 



