in the Middle Begion of Scotland. 



173 



Glen Roy and Loch Lochy, at the height of 2200 feet above 

 the sea. 



Loch Earn — Two arrows 14. — At the west end of the vil- 

 lage of Comrie there is a broad platform or shelf of clay-slate, 

 projecting ten yards from the hill above, and of wliich Fig. 3 



Fig. 3. 



Fiff. 4. 



./ 



.(J 



is a section lengthways. It rises 25 feet above the road, is 

 about 200 feet long from a to d, flat on the top be, truncated 

 at the east end, c d, but terminating in a beautifully rounded 

 and smoothed declivity a b, at the west end. This form is 

 shewn in the section, and prevails among the adjacent rocks 

 The platform, b c, exhibiis a fine specimen of grooving. The 

 whole area is smoothed, and the grooves appear at intervals 

 over all the flat part of it, of which they cover a considerable 

 proportion. They are from \ inch to a full inch in breadth, 

 straight as mathematical lines, and everywhere rigorously 

 parallel. Their bearing is WNW. and ESE., or more cor- 

 rectly N. 60 W., and S. 60 E., and they cross the planes of 

 the slate at an angle of 25° or 30°. One space, 10 feet by 3, 

 is entirely gi'ooved. 



In the picturesque and beautiful district from Comrie to 

 St Fillans. at the east end of Loch Earn, a succession of rocks 

 occur on both sides of the road, which present smoothed and 

 abraded faces, e/(Fig. 4), to the west, while the eastern side, 

 fg, is rugged or uneven. 



At the east end of the loch, on the south side, there is a sec- 

 tion of the rock exposed, close to the cart-road. It is 10 feet 

 long and 6 feet high, and is entirely covered with grooves 

 from \ to 1^ inch in breadth, and nearly horizontal. The 

 grooved area faces the NNW., crossing the axis of the loch 

 at Xb" or 20°, and is inclined to the horizon at 35°. It is 

 about 5 or 6 yards above the level of the water. I found 

 striae also on the north side of the loch at two places, running 



