262 Proceedings of the Royal Society of Edinburgh. [Sess. 
Towards the latter isoseismal, however, there was a marked decline in 
audibility. The sound was compared to passing waggons, etc., in 24 
per cent, of the records, thunder in 16, wind in 8, loads of stones falling 
in 10, the fall of a heavy body in 24, explosions in 16, and mis- 
cellaneous sounds in 2 per cent. 
(11) 1905, September 22, about 1.30 a.m. 
A tremor, felt at Alloa and Bridge of Allan. 
(12) 1905, September 25, early morning. 
A very slight tremor, felt at Alloa and Cambus. 
(13) 1915, September 30, 9.45 p.m. 
A slight shock, accompanied by a rumbling noise, felt at Menstrie. 
(14) 1905, October 29, 10.53 a.m. 
A sound, resembling distant thunder, without any accompanying tremor, 
heard at Menstrie. 
(15) 1905, December 22, 9.15 p.m. 
A slight shock, felt throughout the village of Menstrie. 
(16) 1906, July 3, 2.15 p.m . 
A slight shock (intensity 3), felt at Menstrie, accompanied by a sound 
like the fall of a heavy body, 
(17) 1906, July 4, 3.45 a.m. 
The shock (intensity 4) was felt at Airthrey, Alva, Blairlogie, Menstrie, 
Red Carr, and Tullibody, all in the Hillsfoot district. The shock is 
described as a quivering thud, strongest at the beginning, and lasting two 
seconds. The sound was heard by all the observers. 
(18) 1906, July 7, 5.29 a.m. 
The shock (intensity 4) was felt at Alva and Menstrie. The sound was 
heard by all the observers. 
(19) 1906, August 24, 5.25 p.m. 
A very slight shock, felt at Menstrie. 
