689 
of Edinburgh, Session 1877-78. 
These boulders had all come from the westward, viz., down the 
valley, as shown by the way in which they were fixed. 
If the question be, whether they were brought by glacier or 
by floating ice, the answer is, that there is not much evidence 
either way. It may however be remarked, that if they were pushed 
forward by a heavy glacier, it is odd that the boulders should not 
have been carried further down the valley, and that the obstructions 
on their east side, against which they have stuck, should not have 
yielded under the pressure of a ponderous glacier. The boulders 
in figs. 13 and 14 were resting on detritus, and pressing against 
detritus only on their east sides. The boulders in fig. 15 was 
pressing against a hard rocky stratum of clay slate on its east side. 
In several parts of the hill, smoothed rocks of mica schist occur, 
with knobs of quartz standing up above the general surface. Being 
harder than the mass of rock, they had resisted the friction better ; 
these knobs were smoothed, the smooth parts being always on the 
west sides. 
Fig. 16, Plate III., shows a rock with joints. The projecting 
angles facing the west have been smoothed by some abrading and 
grinding force. 
2. Glen Dochart . — There are many boulders of considerable size, 
resting on detritus, and chiefly on the south side of the valley. 
One near an old toll-bar measured, in so far as above the ground, 
13x12x8 feet, at a height of 630 feet above the sea. 
At the small farmdiouse of Wester Lix, at a height of 660 feet 
above the sea, there is a flat or terrace, partly rock, partly detritus, 
on which there are several large well-rounded boulders, two of 
them a coarse granite, probably from Ben Cruachan. 
On ascending the hill towards the south, a boulder, 12x9x5 
feet, was met with, at a height of 1116 feet above the sea. Its 
longer axis bore E. \ S., which is also the direction of the axis 
of the valley in this place. There being no rocky hill near, from 
which this boulder could have come, it has certainly been brought 
to the spot where it now lies, by some transporting agent. 
At the height of 1250 feet there is a mass of rock on the same side 
of the valley, and nearer the top of the ridge, which has on it some 
noteworthy marks. The rock stands out prominently, and forms a 
nearly vertical cliff, as shown in fig. 17, Plate III. On the side 
