various parts of Scotland, 40X 



pink coloured quartz. I did not observe any foreign matters im- 

 bedded in the trap, except minute drusy veins of calcareous spar. 



Such are the very limited observations, which an inspection un- 

 avoidably much hurried, enabled me to make on thi-i part of the 

 group. Although the general aspect of the other two islands would 

 lead me to expect in them an identity of structure, yet they may 

 afford differences worthy of further investigation. 



Kum. 



A stormy sea, a dangerous shore, want of harbours, a trackless 

 country, and a scanty and wretched population, render it as dif- 

 ficult a task to reach this island as to examine it. 



It forms one mountainous tract of rugged and barren aspect, and 

 of considerable extent, although its highest mountains, which lie 

 towards the west, do not appear to exceed two thousand feet in 

 elevation. My observations were limited to the only two parts of 

 the island which are tolerably practicable, Loch Skresort, and Scuir- 

 more. 



Loch Skresort forms a semicircular indented bay, from which 

 the land shelves gradually upwards by a moderate acclivity, till it 

 approaches the middle region of the mountains, from whence the 

 further ascent is steep, rugged, and often precipitous to the very 

 summits. These terminate in craggy and broken points, exhibiting 

 abrupt faces, and piles of ruins. The rock which incloses the bay 

 of Loch Skresort, is a reddish argillaceous sandstone, disposed in 

 beds and elevated to a low angle, varying from ten to fifteen de- 

 grees, occasionally fractured, bent, and displaced. It appears to 

 be the result of the decomposition of granite, since the argillaceous 

 grains are often found to consist of felspar in a state of integrity, 



Vol. II. .S E 



