261 
of Edinburgh, Session 1878-79. 
which fronts N.N.E. There are no striae on this face, as a force 
coming from W.N.W. would not strike on it. 
In the lower rock there are small cavities or depressions ( a , b, c) 
in the general surface, in consequence of which the continuity of the 
striae has been interrupted. When I first examined the rock, two 
of these cavities were filled with boulder-clay. The west sides of 
the cavities are vertical, but the east sides are smooth and sloping, 
having apparently undergone attrition by the materials passing 
over them from the west. This point is further explained by 
the section EF at the bottom of the diagram. 
Besides the smoothed and striated rocks, in Linton and near it, 
just described, there are cases of the same kind at the following 
other places in East Lothian, all of which I have examined : — 
viz., North Berwick Harbour, Kingston, Dirleton, Redside, Balgone, 
Whitekirk, Smeaton, and Rhodes. At each of these places there 
are indications of a movement from the westward, in accordance 
with what is shown by the Linton rocks, and also by the striae on 
North Berwick Law, as inferred by Mr Stevenson in his paper. 
I have also within the last few days had an opportunity of 
visiting North Berwick Law, and of seeing the rock described by 
Mr Stevenson. It is the only part of the hill on which I could 
find smoothing and striation; and it is important to notice that 
it is the N.W. part of the hill on which these markings occur. 
I regretted to find, that since Mr Stevenson’s inspection and report 
in the year 1875, most of the smoothed and striated rock has been 
destroyed by quarrying. But some parts remained ; and having in 
my hand a photograph of the rock, which Mr Stevenson had kindly 
given to me, I was at no loss to see what had been its principal 
features. I brought away a specimen of the smoothed surface, 
which I detached, and on part of which striae occur. This speci- 
men I now exhibit to the Society. 
I found that the smoothed surface generally dipped towards the 
N. or N.W. at an angle of from 65° to 70°. 
Parts of the smoothed surface faced N. W., other parts faced various 
points towards due N. and even N. by E. ; but wherever the rock 
faced a more easterly point, there was no smoothing. The specimen 
on the table shows these differences, because it has two faces meeting, 
forming an angle between them, and fronting in different directions. 
