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Proceedings of the Royal Society 
rocks faced W.N.W., towards the north there was a gradual change 
to due west, and then ultimately at Carlowrie to W.S.W. and S.W. 
These deviations from the normal direction occur at low levels. 
Near the hill tops, at from 300 to 400 feet above the sea, there was 
little deviation from W.N.W. 
The Convener examined a striated rock near the north end of 
Loch-na-Muilve mentioned by Mr James Geikie in his paper on the 
glacial phenomena of the Hebrides (“ London Geological Society’s 
Journal ” for 1873, p. 537). As there are some points of interest on 
this rock not included in Mr Geikie’s notice of it, a representation of 
the rock is given in fig. 32. 
The rock dips down towards W.S.W. at an angle of about 30°. 
There are two portions of smoothed rock visible as shown in the 
figure — the space between them consisting of a stony clay, which 
probably lies on rock, though the rock is not visible. The part of 
the rock which is visible has evidently been smoothed by the passage 
over it of some material- — such as the clay, of which a portion 
remains, containing pebbles and stones. The striae and ruts are not 
all parallel. The lowest rise upwards across the rock at an angle of 
about 8°. The ruts in the upper portions of the rock surface rise 
up more quickly till at length, in the highest part, they rise at an 
angle of about 26°. Another feature is, that some of the ruts are 
deeper and wider at their west end than at their east end. The 
directions of the lowest ruts is N.W., of the highest W.N.W. If 
the general line of the current was W.N. W., the highest ruts would 
be more likely to indicate that direction than the lowest. 
At Garry-na-hine, and also on the hills about two miles north of 
it, there are numerous cases of boulders on smoothed rock surfaces 
facing the west, the boulders being blocked at their S.E. ends by 
special obstructions, which were in each case distinctly observable. 
7. Mr James Geikie refers to a water shed called “Beinn a 
Bhuna ” on the road between Stornoway and “ Garry-na-hine,” where 
he says there are “ smoothed and glistening domes of gneiss.” 
The Convener examined all the rocky knolls at the place referred 
to, on both sides of the summit level, which is about 400 feet above 
the sea. The smoothed surfaces are numerous, and particularly on 
the west side, where they face the N.W. The boulders are also 
more numerous on that side, and are generally on rock surfaces 
