of Edinburgh, Session 1882-83. 
195 
end, sloping down northward, westward, and southward. The slope 
most thickly covered with boulders was that sloping to N.W. at 
an angle of about 40° (see diagram 1). The three largest were of 
the following sizes : — 15 x 8 x 5 feet ; 18 x 9x8 feet ;i 12 x 7 x 4 
feet. 
The boulders are all, more or less, well rounded. The sides 
most rounded were those facing N.W., suggesting the idea that, 
after having reached the hill, they had been exposed for some time 
to friction from some agent impinging on, or passing over, them. 
They appeared to be all composed of one description of rock, viz., 
a compact fine-grained gneiss, which is also the composition of the 
Ormsary “Big Boulder” and its companions, before referred to. 
The rocks in situ on this Tign-a-Kaim hill are soft schist, and on 
edge. 
. On the highest part of the hill, and about 20 or 30 yards on the 
south side (at A on fig. 1), there are several boulders in positions 
of considerable interest. These are shown on fig. 2. Where boulder 
A is represented on fig. 2, the ground is nearly flat ; at B, the 
ground begins to slope slightly down south ; and at D, the south- 
ward slope is as much as 20° or 23°. Boulder D has a girth of 
about 26 paces, or 78 feet. Its height is about 15 feet. The size 
of B is 10 X 10 X 10 feet, and of A, 6x5x3 feet. 
It was observed that a fragment had been broken off each of the 
two largest boulders at their south ends. The form of the fragments 
and their proximity to the boulders made this evident. There may 
originally have been cracks in the boulders, allowing rain to enter, 
and the action of frost to split off the ends. Another conjecture 
is, that if the boulders, when brought to the hill, fell from any 
height, and if they had a projecting piece of rock at their south ends, 
the concussion in the mass, produced by the central solid portion of 
the boulder first striking the hill, might cause the projecting piece 
to break off. The direction of the longer axis of the largest boulder 
D is about W.N.W. and E.S.E. 
Not far from these, and also on or close to the highest part of 
the hill, there are other two boulders (shown on diagram 3) touching 
one another, A being 17 x 8 x 8 feet, and B 18x10x10 feet. The 
direction of the longer axis of A is S.W., and of B, N.W. A small 
boulder lies between the two, at the north end, firmly jammed. It 
