of Edinlurghy Session 1883 - 84 . 
859 
1865, p. 165) that Schehallion is marked on top, as well as on its 
flanks, by traces of ice passing over it from the north. 
He further states, that along the north slopes of the great ridge 
of mica slate, stretching from Schehallion in an E._ and W. direction 
for 10 miles, he saw many houlders of granite and porphyry^ at 
heights exceeding 2000 feet, above the sea ; — the one at the highest 
elevation, being a granite boulder, at an elevation of 2370 feet. On 
the ridge where these houlders lie there are no granite or porphyry 
rocks ; but such rocks do occur to the northward (as in Glen Tilt)^ 
where, therefore, probably is the source from, which the houlders 
came {Seventh Report^ p. 40). 
On the Perthshire Hills, between. Blair Athole and Dunkeld, Mr 
Jamieson found ice-worn surfaces of rock on the tops of hills, at 
elevations of 2200 feet, as if caused by ice pressing over them from 
the N.W. ; — and transported houlders at even greater heights. 
On the highest watersheds of the Oehils^ at altitudes of about 
2000 feet, Mr Jamieson found pieces of mica schist full of garnets, 
which seemed to him to have come from the Grampian Hills to the 
N.W., showing that the transporting agent had overflowed the 
Ochil range {Seventh Report , p. 42). 
Pitlochry. — On road to Straloch, a. mica slate boulder, about 8 
tons weight, called Gledstonef about 1800 feet above sea, lying 
on gravel drift ; adjoining rocks are clay slate. Legend that this 
boulder gave nanae to Gladstone family, an infant having been 
found at boulder by shepherd, who took it to his wife to he nursed. 
Near parish church of Straloch, “ Clach Mhor^' {Great Stone), a 
boulder of coarse granite, about 24 x 20 feet, and weighing about 
800 tons. Many other houlders of mica slate and quartzite beside 
it. Supposed to have come from the north, through a valley 
there. Adjacent rocks, clay slate {First Report, p. 47). 
Luih. — Large houlders lying in a line along ridge and top of 
Beinn nan Clach. One, much rounded, on the solid rock of the very 
summit, 2309 feet above sea. Summit rock also much rounded. 
The outcrop of the strata on hill-side have been broken off by some 
means {Ninth Report, p. 13, and Lithograph No. 39, Plate X.). 
.Penfrewshire. 
Kilharchan. — A porphyry boulder, 27x17x12 feet, weighing 
3 L 
VOL. XII. 
