246 AC COUNT, &c. 



extent or force. The rumbling noifes or ilighter concuf- 

 fions, as ufual, are obferved at Comrie, in Glen-Leadnach, 

 and the places in their near neighbourhood ; the more violent 

 extend to much the fame diftance as formerly defcribed. Having 

 been only occasionally in that country fince February 1791, I 

 have not been able to afcertain dates. On the 2d of September 

 1791, at five minutes pad five in the afternoon, a flight ihock 

 was felt at Ochtertyre. The barometer was not in order, on 

 which account the weight of the atmofphere could not be afcer- 

 tained. Its electrical ftate was tried by Saussure's electro- 

 meter, but no indication of any thing uncommon was per- 

 ceived. Since that period, Ihocks have been obferved at diffe- 

 rent times till within thefe few weeks part. 



From this account, it will be obferved, that all the greater 

 mocks have taken place in the feafon of autumn or the begin- 

 ning of winter ; that this has been now repeated for more than 

 four years ; and that thofe greater fhocks have been fucceeded 

 at fhort intervals by rumbling noifes or more feeble concuffions. 

 It has alfo been remarked, that they have in general been pre- 

 ceded or followed by great rains or boifterous weather ; but 

 variations in the weather take place fo frequently in our cli- 

 mate at that feafon of the year, that the connection between 

 them and the phenomena above defcribed, is probably altoge- 

 ther accidental. 



R. T. 



XII. 



