of Edinburgh, Session 1883 - 84 . 
795 
scratches whenever I saw them.” Mr Jamieson then gives the 
bearings at twenty localities in Caithness, from which he concludes 
that the movement had been from N.W. to S.E.; and he adds, that 
‘‘ a movement of ice from IST. W. to S.E. across Caithness is totally 
at variance with the notion of the scratches having been caused by 
glacier action proceeding from the interior of the country towards 
the present coast.” In a footnote, Mr Jamieson adds, that “ the 
presence of marine organisms (in the Caithness drift), and the 
direction of the glacial striae, which indicate a movement from the 
N.W., where there is now nothing but open sea for an immense 
distance, together with the absence of moraines, are all suggestive 
of marine conditions having prevailed during the deposition of the 
Caithness drifts 
In year 1828, the late Sir Eoderick Murchison published a paper 
in Proceedings of London Geological Society, in which he men- 
tions that “ the highest hills in the Brora district afford, upon their 
sides and summits, distinct traces of a strong diluvial current, which 
has swept them free of covering matter, and deposited in the plain 
of Clyne, Milltown, a mass composed of the debris of the denuded 
hills. A large portion of the turf having been recently removed, 
the surface of the rock was seen to be scored with parallel lines. 
The direction of the markings is uniformly from H.N.W. to S.S.E.” 
Dumbartonshire, 
Luss. — On west bank of Loch Lomond, about 150 feet above sea, 
in channel of a brook entering Fruin Water, a mica schist boulder 
28 X 18 X 7 feet (246 tons). Longer axis E. and W., with sharp end 
to west. Kocks adjoining— Old Red Sandstone. Nearest mica schist 
hills about 5 miles to N. and W. If boulder came from that direc- 
tion, it must have been carried across hills from 1000 to 2000 feet 
high. If it came from north, down Loch Lomond valley, it must, after 
coming so far, have changed its course and moved at right angles to 
westward to gain its present site (^Second Report, p. 153, Fourth 
Report, p. 20). 
On a moor, about half a mile to N.E. of the above boulder, there 
are several smaller boulders of mica schist, all with longer axis in 
similar direction, viz., east and west. 
On west side of Loch Lomond, at Arden, a low valley running 
3 G 
VOL. XII. 
