C)22 MR. C. DAVISOX ON THE INVERNESS 



Aldourie, Beauly, Bunchrubin, Cawdor, Dingwall, Inverness, and 

 Torbreck ; first downward and then upward at Dyke. 



3. Intensit)/, — At a few places the shock was strong enough to 

 produce slight damage to buildings. At Inverness, in the south- 

 east part of the town, a chimney was thrown down, and in the east 

 part a house-wall was cracked. Between Dores and Inverness a 

 wall was cracked. At Chines the shock was strong enough to 

 " open cracks " in the walls. At Beauly the only damage known 

 was the fall of a chimney-can. It is obvious that damage of so 

 slight a character does not entitle us to rank the intensity of the 

 shock at more than VII., according to the Rossi-Forel scale. The 

 following table gives the intensity at different places, as far as 

 known to me : — 



YII. Balnafettack, Beauly, Olunes station, Dingwall, Drumna- 



drochit, Inverness, Kirkhill, North Kessock. 

 YI, Aldourie, Fortrose. 



y. Boleskine, Chanonrj^ Point lighthouse, Conon, Cromarty 

 Perry (near Nigg), Delrachnie, Dores, Dunmaglass, Dyke, 

 Edenkillie, Fort George station, Glassburn, Invermoriston, 

 Moy, IN'airn, Strathpeffer, Torbreck, Torness. 



lY. Alness, Auldearn, Aultguish Inn, Avoch, Bunchrubin, 

 Burghead, Covesea lighthouse, Cromdale, Dalmunack, 

 Dunrobin Glen, Forres, Garve, Glass, Glencarron, Glomach, 

 Golspie, Helmsdale, Inchbreen, Kinloss, Kirkmichael, New 

 Spynie, jSTewtonmore, Eafford, Struy. 



III. Achnacarry, Duff as, Hopeman, Keith, Kingussie. 



The data are sufficient to allow isoseismal lines corresponding to 

 intensities Y. and lY. to be drawn. The former is 48 miles 

 long and 37 miles broad, and includes an area of about 1350 

 square miles ; its longer axis is directed from N. 48" E. to S. 48° W. 

 The dimensions of the latter curve have already been given. The 

 longer axes of the two curves are therefore approximately parallel. 

 It is also noteworthy that in the north-west quarter the distance 

 between the isoseismals is 17 miles, i. e. more than twice as great 

 as towards the south-east, where it is 7| miles. 



The centre of the isoseismal line of intensity Y. is at a point 

 4J miles S. 21° E. of Inverness. This point may be taken as indi- 

 cating the position of the epicentrum, the distance between the two 

 points in all probability being very small. 



4. Sound-phenomena. — I have received records altogether from 

 115 places ; in 95 of these the usual earthquake-sounds were 

 heard ; in two of them the sound was heard, but the shock was not 

 noticed : from the remaining 18 places no reference is made to 

 sound-phenomcDa. As already stated, the places where the sound 

 was heard are indicated by small crosses ( -1- ) through the spots 

 representing them ; and a glance at the map is sufficient to show 

 that, so far as the evidence goes, the earthquake-sounds were heard 

 throughout the whole of the disturbed area. 



