633 
of Edinburgh, Session 1879-80 
it is from the west that he thinks they came. Moreover, in Mull, 
the hill of Benmore is 3180 feet above the sea, whilst in Ardna- 
murchan there are hills nearly that height. It strikes me, there- 
fore, that it would be very desirable, if Professor Heddle could, in 
the course of this summer, visit Mull and Ardnamurchan to see 
whether he agrees with Professor Judd’s surmise on this subject. 
III. Convener’s Notes. 
The points brought out in these, are very unimportant, compared 
with those of Professor Heddle and Messrs Jolly and Wallace of 
Inverness. 
1. The boulders in Cantyre I found had, on the south and east 
coast, come apparently from some point due north ; those on the 
west coast, from points varying between N.W. and N.N.W. 
2. In Arran, the boulders on the east coast, which were all that 
I examined, seem to have moved in a direction from about due 
north. 
3. In the Cumbrae islands, they seemed also to have come from 
due north. 
4. In Loch Long and the Gairlocli, the boulders showed transport 
from points varying between H.N.W. and N. by E., which happens 
also to be about the axial line of the valleys in which the boulders 
lie. 
5. In the hills to the north of Loch Fyne , I was rather surprised 
to see the smoothed rocks facing N. and N.E., and the boulders 
lying with their longer axis in much the same direction. 
6. When I reached Loch Awe, I found the boulders among the 
hills, at from 900 to 1000 feet above the sea, indicating in like 
manner transport from the N.N.E. 
This deviation, at several places in the interior of the country, 
from the 1ST.W. direction which is so prevalent elsewhere, at first 
rather surprised me ; but it probably does not on principle differ 
materially from the fact, that occasionally on the same rock, or 
on the same boulder, there are separate sets of striae. If these striae 
are produced by currents which run first in one direction and there- 
after in another, a similar explanation might apply to the variations 
of direction over a large district of country. 
For example, Professor Heddle, as we have seen, takes notice of 
