127 
of Edinburgh, Session 1878-79. 
a quarry by the roadside of Boisdale in South Uist, he observed 
“ striae running from N. 40° W. (magn.) pointing at a gap in the 
hills.” This is probably the same spot as that noticed by the 
Convener. It was shown to him by Mr Drever, factor to Mrs 
Gordon of Cluny. 
2. Loch Boisdale, a sea loch, is situated on the east coast. On the 
north side of the loch, there is a hill called Kennet, reaching to a 
height of about 890 feet. 
The rocks on its hT.W. side, from bottom to top, present numerous 
examples of flattened and rounded surfaces. The surfaces facing 
the S.E. on all sides of the hill are rough and angular. On the west 
side of the hill, at various levels between the bottom and the top, 
there are numerous boulders, some of them, by the way in which 
they lie, affording unmistakable evidence of the direction from 
which they came. 
.For example, there are two boulders on a narrow shelf of rock 
which slopes down S.W. at an angle of 40°. The shelf is 96 feet 
above the sea, and quite close to the sea. The shelf is on the sea 
cliff, which is so steep, that the wonder is, how the . boulders 
could have found a cleft in it to hold them. (Fig. Ho. 14 shows 
these boulders.) On the east side of the boulders there is a 
projecting ledge, against which the eastmost boulder (A) presses, and 
which had stopped its farther progress eastward. Another boulder 
(B) lies upon (A), and which, to get on the top of (A), must have 
come from some westerly point, — probably the H.W. A line 
through the chief points of contact and the centres of bulk runs 
in a direction 1ST. 1ST. W. A study of the boulders on the spot 
showed that, if they had been brought to this site from any other 
direction, they would inevitably have slid down the steep rocky 
bank into the sea. These blocks are nearly equal in size, viz., about 
5x3x2 feet. 
Fig. 15 shows a large boulder of coarse granite resting on a 
wedge of gneiss rock. The wedge or knob is under the boulder at 
its east end, and tilts up the boulder slightly so as to show daylight 
under the boulder at that end. It rests on the ground chiefly at its 
west end. By this wedge ( a in the figure) the boulder has evi- 
dently been stopped in its progress from the H.W. From its 
rounded shape, one might infer that the boulder had been rolled or 
vol x. 3 
