Mr D. Milne on Earthquake Shocks in Great Britain. 111 
“rather an undulatory motion of the ground” from the W. A 
man lying in bed N. and S. was thrown to east. 
At Ardvoirlich, 10 miles W. of Comrie, there was no shak- 
ing felt, and only a sound, which resembled «a carriage driv- 
ing up to the door,” for which it was mistaken. 
At Monzie, 10 miles NE. of Comrie, there was “merely 
heard a subterranean noise.” 
12th October 1839. 
The Rev. Mr Walker of Comrie writes, that “the shocks of 
12th at 1 and 4 p.m. (which were very similar and which 
were attended with a considerable tremor of the earth), were 
accompanied with a noise resembling a mixture produced by 
the rush of the strong wind and the peal of distant thunder. 
It was different from any noise which I ever heard before. 
The shock at 3 p. w. (which was far more severe than any that 
had preceded it, and which was attended with greater tremor 
or heaving of the earth), was accompanied with a noise which 
at first resembled the murmurings of distant waters. This 
continued increasing in intensity for about 2”, and then fol- 
lowed a very loud and terrific sound resembling that of a 
double shot for blasting rock immensely charged. 
‘The weather has been remarkably wet during the month 
of October, and indeed for some months previous, and still 
continues so. No day has brought along with it any other 
than a moist, and often a very moist atmosphere. This was 
especially the case on the 10th when the first severe shock 
was felt. In the morning of that day the clouds were evi- 
dently surcharged, while in the evening for some hours the 
rain fell in torrents, accompanied with a very violent wind 
from the SW. by W. Again, on the 12th, when three severe 
shocks, and so many slighter ones, were felt, the atmosphere 
was very moist. The air was much darkened during the 
shocks, and occasionally there fell a few drops of rain. After 
the second severe shock this day, I retired to the garden to 
note the appearance of the sky. I found that it had assumed 
an appearance peculiarly strange and alarming. The heavens, 
more especially towards the N. and NW., appeared as if hung 
with sackcloth. A dense dark indescribable species of mist 
enveloped the mountains in that direction. In many parts 
they were completely concealed ; while in others, the broken 
