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Notices of Earthquake Shocks felt in Great Britain, and espe- 
cially in Scotland, with inferences suggested by these notices as 
to the causes of the Shocks. By Davip Miuyz, Esq., F.R.S.E, 
M.W.S., F.G.S., &e. Communicated by the Author. 
(Continued from page 127 of No. Lxiii.) 
In the immediately preceding number, an account was 
given of the effects and impressions produced in the village of 
Comrie, by the shock of 23d October 1839—the severest, un- 
questionably, of any which, within the memory of the oldest 
inhabitants, had been felt there. In the present number it is 
intended to describe the effects and impressions produced by 
the same shock, in localities more distant than Comrie, from 
the apparent focus of violence. This detail is excusable, con- 
sidering the singular, and, in this country, unexampled severity 
of the shock—the extent of country over which it was felt— 
the importance of determining the point from which all the 
Strathearn shocks emanate—and the value of many of the 
circumstances observed, indicating, as they do, the nature and 
progress of the shock. 
The accounts received from different parts of the country 
will be submitted in the following order :—/%rs¢, There will 
be given those which relate to the glen or valley of Strathearn ; 
and, second, There will be given those which relate to more 
distant parts of the country. 
I.— Accounts FROM STRATHEARN. 
Tullybanocher, about half a mile west of Comrie.—Mr 
M‘Isaac writes :—‘“ On Wednesday 23d, at 10" 15’ p.m., we had 
the most alarming earthquake that has been felt in this place, 
and which was followed in rapid succession by other ten—the 
last of which was at a little past 12 o’clock. We had the first 
seven of these in the short space of 20’. I felt all the shocks 
come from the direction of the hill Dundownie, on which 
the monument in honour of Lord Melville stands, and which 
is due N. from my house. They commence like an explosion, 
and instantaneously the shaking commences, and is accom- 
panied and followed with a loud noise. There is no interval 
between the noise and the concussion. The noise continues 
