368 Mr D. Milne on Earthquake Shocks felt in Great Britain, 
falling back again when the opposite end was elevated. I only 
state the idea I had of it at the time, but must confess that 
my sensations and feelings were so strangely agitated, that I 
could not attend to the different particulars accompanying it. 
You will observe I consider this last shock of earthquake as 
double ; first the tremulous motion or jumble, and then the 
angular roll or jolt upwards. The interval between the two 
appeared to be about two seconds. The sound that preceded 
the shock, although likely from below the surface of the ground, 
yet appeared to me to be above it in the second instance, and 
in the first to be high in the air. I have thus stated simply 
my ideas and feelings of these visitations of earthquake, as I 
heard and felt them. It will be the province of wiser men to 
unfold their nature and tell us their cause.” 
Foulis Manse, about ten miles north-east of Comrie.—The 
Rev. Mr Maxton writes :—‘‘ The concussion remained percep- 
tible about four seconds. It was an undulation or movement of 
the ground, whereby objects on it were lifted up and let down 
again. I was in bed when I felt the concussion, in which I 
was sensible of three oscillations, which may be described in 
the following manner :— 
f a 
NAN 
ws é c¢ 
Suppose a b to be the surface, c to be the spot where I felt 
the concussion moving from north-west ; at c, I was lifted up 
to d; I was then let down again to e, and then lifted up to f 
Objects rocked like a cradle, or a boat lifted up by a wave. 
The shock was stronger in the first oscillation than in any of 
the rest. The shock, from the noise which accompanied it, 
appeared to come from the north-west, and to proceed in the 
direction of south-east. There was a noise which preceded, 
and another which accompanied, the concussion, and the inter- 
val between them was about 4”. The noise remained percept- 
ible about 3”. The noise which preceded the concussion was 
hard and rattling, as if the stones of a wall or dyke had been 
falling down. The noise which accompanied it was hollow 
and rumbling, like distant thunder, and by some it was mis- 
taken for it. The former appeared to be in the air, the latter 
