and especially in Scotland. 379 



focus of action, would produce more effect on an alluvial de- 

 posit than on almost any other kind of surface, can be readily 

 conceived ; and it was clearly shewn in other places nearer 

 Comrie, that an undulatory movement of the earth's surface 

 was produced. But if at Kingussie there was an undulation 

 produced in the haugh-land just referred to, would this undu- 

 lation consist of more than one, or at the most two, waves \ 

 and would they not move progressively forward, leaving the 

 surface as level as formerly ? How could the waves or any 

 portion of them have been arrested in their progress, so as to 

 present a series of nine or ten parallel undulations \ Is it suf- 

 ficient explanation, that the surface when raised, say ten 

 inches above its ordinary level, might have sunk back only 

 six or eight inches, and that as the original wave advanced, it 

 might produce successively a similar effect in different parts 

 of the field, — effects which, if produced, would be exhibited in 

 lines coincident with the direction of the moving cause ? 



It is proper to add, that similar undulations, though less 

 distinct, were perceived in another haugh near Kingussie, on 

 the south side of the river. 



At Inverness, as the author was informed by Mr George 

 Anderson, " the earthquake was felt about 15' or 20' after 10 

 p. M., and as far west as Fort Augustus. At Inverness, there 

 was no second shock ; and in the country around, where such 

 was felt, it was so slight, as only to be perceptible to a very 

 few persons. 



*' At Inverness the nature of the concussion was that of a 

 mere tremor, as if occasioned by the passage of heavy car- 

 riages along the street ; there was no undulation. At Farr, 

 Colonel Mackintosh felt as if the house had received a con- 

 cussion producing an undulatory motion across it in an easterly 

 direction, which was succeeded by a loud tremulous and rum- 

 bling noise, resembling that of wheeled-carriages driven ra- 

 pidly past the house, in a direction «from S.W. to N.E., ami 

 lasting about 30 seconds. The writer does not think the du-* 

 ration generally was more than from 20 to 30 seconds, 



" The pulsation shook houses and furniture in them, but so 

 slightly, that it was not perceived by many ; and in several 

 instances the noise was only thought to be caused by servants 



