850 J. GEIKIE ON THE GLACIAL PHENOMENA 



Campbell has referred to*. The bearing I got here was W. 10°- 

 15° N. Mr. Campbell, however, gives N. 65° W. magnetic, and 

 mentions that a stick laid in one of the grooves pointed directly to 

 the Coolin Hills in Skye. But these mountains bear E. 18° S. from 

 this particular place, so that the direction (N. 65° W. magnetic) he 

 gives for the striae has hardly enough northing. In Shiffrey Moor, 

 near Lochbi, the striae bear W. 15° IS". South of Lochbi, however, 

 they begin to swing round to south of west, several bearings between 

 the loch and Crogaire giving W. 10° S. to W. 15° S. Between Cro- 

 gaire and Dreimsdal the striae point W. 8° S., W. 10° S., and W. 15° S. ; 

 and between this latter place and the river Torra the directions are 

 W. 10° S., W. 15° S., and W. 20° S. Passing over the low boggy 

 ground through which the Gheatra flows, we reach a finely striated 

 face, a short distance north of Loch Hollai, which gives a bearing of 

 N. 45° W. For two miles south of this the striae continue to point 

 nearly due north-west, but gradually assume more westing. Thus, 

 one mile south of Loch Hollai they are W. 35° N"., on the side of 

 Beinn Corraivi W. 20° IS"., immediately south of that W. 10° N., 

 and then due W. Between Airimhuilinn and Aisgernis are a 

 number of striated rocks, on which the direction varies from W. 2° 

 or 3° N. to W. 5°-8° 3ST. Near Loch HaUan the bearing is W. 5° N., 

 at Loch-nam-faoi]eann "W. 3° 1ST., near Loch Dun-na-cille W., between 

 the School and Pollachara W. 15° N. and W. 35° N. A very fine 

 striated face (E. and W.) is exposed in a pit on the side of the road 

 at the foot of Cairisbhal. The direction of ice -flow is very plainly 

 seen here ; it is clearly from the east. 



Mr. Campbell mentions other two localities, besides the one 

 referred to above, where he observed striae; but, owing to the 

 paucity of names on the Admiralty chart, I am not quite sure of 

 the places indicated by him. But as I walked the whole length of 

 the island — half of the way twice over — and was on the constant 

 outlook for striae, it is hardly likely that I missed the striated rocks 

 mentioned by Mr. Campbell. He gives ET. 40° W. magnetic as the 

 bearing of striae at Birsdale, in a quarry by the roadside. The other 

 direction he gives is " about halfway up the island, about 100 feet 

 above the sea-level, in the flat country on the west side of the hills, 

 near a large perched block." The bearing given is N. 52° "W. mag- 

 netic, and " the grooves point at a gap in the chain of hills." This, 

 I have no doubt, is on the roadside near the foot of Beinn Corraivi, 

 where I obtained the same bearing. 



The hills that face Eirisgeidh Sound are very highly glaciated, 

 and the direction of ice-flow is quite apparent ; it is W. 20°-30° N. 

 The range of hills between Loch Boisdale and Lochaoineart are also 

 severely glaciated, their bare bald summits being distinctly smoothed. 

 We tried to climb Staolabhal (1227 ft.), but were prevented by 

 stormy weather ; but, as seen from below, the mountain has all the 

 appearance of having been smothered in ice, and the hills between it 

 and Loch Boisdale have certainly been so, their roches moutonnees 

 being rounded off from the south-east. We boated down Loch 

 * Op. et loc. cit. 



