Vol. 6^.~\ OCHIL EAKTHQTJAKES OF 1900 TO 1907. 



369 



(24) 1906, October 12th, 7.20 a.m. 

 A distinct shock was felt at Menstrie. 



(25) 1906, October 20th, 7.15 a.m. 



A slight tremor and sound were observed at Airthrey. 



(26) 1906, October 24th, 7.11 p.m. 



A report, like that of a distant cannon, was heard generally at 

 Menstrie. 



(27) 1906, October 26th, 7.15 p.m. 



A slight shock was felt at Airthrey and Menstrie : at the latter 

 place it consisted of two vibrations, at the former it was accompanied 

 by sound. 



(28) 1906, October 30th, 12.15 p.m. 



A slight shock and sound were observed by a few persons at 

 Menstrie. 



(29) 1906, December 28th, 4.12 p.m. 



Intensity, 6; centre of isoseismal 4, in lat. 56° 113' N., long. 3° 51*0' W. 

 Number of records, 10, from 7 places, and 5 negative records from 5 places 

 (fig. 3, below). 



The average of 7 estimates of the time is 4.12 p.m. The shock, 

 which consisted of two prominent vibrations followed by a tremor, 

 was felt at Airthrey, Alva, Burnside Farm (Braco), Dunblane, 



upo 7 13050' long, w: ~~ 13040' 



Fig. 3. Earthquakes op Oct.8 th ;Dec.28 t - h ,A2TDDec, 30™1906. 



oBIackford 



Scale of Miles. 

 12 3 4 



cClackmannan 



Menstrie, Bed Carr, and Tillicoultry ; its intensity was 4 at Airthrey, 

 Dunblane, Eed Carr and Tillicoultry, and 6 (according to three 

 observers) at Menstrie. The disturbed area was probably about 

 11 miles long, 8| miles wide, and contained about 74 square miles; 

 Q. J. G. S. No. 251. 2 c 



