o f Edinburgh , Session 1879 - 80 . 595 
apparently carboniferous. There is a quarry for building purposes 
not far off. 
These two boulders must have been carried , for there are no 
adjoining hills from which they could have fallen. Carried by a 
glacier they could not be, as they are not in a valley nor near any 
from which a glacier could have issued. 
3. To the north of Corrie, about 2 miles, the road passes a large 
boulder called the Catstane, which is about 18 feet in height and 
56 feet in girth. The late Dr Bryce estimated its weight at above 
200 tons. I calculated its cubical contents to be 131 yards, and 
therefore its weight about 262 tons. It is very angular in shape ; 
but I could not ascertain correctly the length and direction of its 
different sides. 
On the beach near the last-named boulder, there is a granite 
boulder which I was able to measure with exactness. It is in height 
about 12 feet. Its longer axis lay in a N. and S. direction, its 
narrowest end being to the north. Its shape and the length of 
its sides are shown in fig. 3, plate XIX. I estimated its cubical 
contents at 106 yards, and its tonnage about 212 tons. 
The boulder next larger in size at the same place is shown in 
fig. 4, plate XIX., A and B, where A represents the lengths of the 
different sides, and B gives an idea of the height, which was about 
10 feet. The direction of the longer axis and of the narrowest end 
was much the same as in the other boulder. 
Another granite boulder on the shore (at the old sea-margin of 1 2 
feet above the present sea-level) is shown on fig 5, plate XIX., where 
A gives a horizontal section to show its shape and direction of its 
longer axis, and B its peculiar position, resting as it does on a mass 
of Red Sandstone (coarse) conglomerate strata, rising up towards the 
north. The position of the boulder, blocked as it is at its south 
end by the sandstone, shows that it has come from the north. The 
girth of this boulder is about 33 feet, its length about 9 feet, its 
width 8 feet, and its height 8 feet. 
Many blocks of the conglomerate sandstone on which this boulder 
rests are found along the shore to the south, none to the north. 
It will not fail to be observed that one feature characterises all the 
cases of boulders just mentioned. The narrowest end points to- 
wards the north, suggesting the idea that, after being deposited, they 
