218 
Proceedings of the Royal Society 
All are rounded and smooth. Four lie ^ en trainee' widely apart, 
the line being N". and S. 
“June 22nd. — Tobermory to more than 3 miles beyond Cal- 
gary, that is, about 15 miles. As you approach the west coast 
of North Mull, along this track, the number of boulders gradually 
decreases, until, say about Calgary, I failed to find any in the parts 
in which I wandered. The contrast is most striking in this respect, 
between this track and that between Tobermory, south-eastward to 
Pennygo^m, lying at the seaward opening of Glen-Forsa. Has ice, 
moving from the north-west, begun to drop its entangled boulders 
near the west coast, and the rate of deposit increase as it passed 
over the track between Runa-Gal and Mishnish, between Mishnish 
and the S.E. of Glen Frisa, and then through Glen Aros? Be this 
as it may, there is no doubt as to the numerical increase of the 
boulders in this direction. They are all much worn and rounded, 
and for the most part comparatively small, though some are large 
enough to have been utilised as gate-posts. 
“July 29. — Ascended Spyon More, 2435 feet above sea-level. 
Wandered in search of boulders, of which there are a good many 
scattered over the hill and on the heights in the immediate neigh- 
bourhood ; — all, so far as could be ascertained, granites — no granite 
occurring in situ in this part of Mull. Four, widely separated, are 
lying ^ en trainee' A line drawn from these across the Sound of 
Alidl, and over the Ardnamurchan hills, would, if extended, pass 
between Eigg and Rum. One of them lies on the very top of 
Spyon More; — another is met with half-way down the hill. The 
others lie in the plain out of which the hill rises. The rocks at the 
summit are well glaciated, and a great heap of moraine-like debris 
rests on it. Brought away chips from these boulders.” 
