594 Proceedings of the Royal Society 
some account has been given of individual boulders remarkable for 
size or position. 
One of the boulders to the south of Brodick Bay is known by the 
name of the Corriegill Boulder. It lies near the shore. Its highest 
point is about 15 feet above its base, and its girth is about 60 feet. 
Its shape is indicated by fig. 1, plate XIX., representing a section 
through it horizontally a little above the base. Its longer axis lies 
N.W. and S.E., with its sharpest end to N.W. 
The boulder is granite of a grey colour, the ingredients being 
crystals of quartz, felspar, and mica, which are all rather larger 
than usual in size, and give to specimens a very coarse and rough 
aspect. It has a vein of finer grained granite running through it. 
The top of the hill called Goatfell bears from this boulder 
X.X.W., and is distant about 4 miles. Granite occurs in situ on 
Goatfell. 
Another boulder was measured, situated about half a mile to the 
north of the above on the shore at half-tide. It was 12x9x8 feet. 
Its longer axis lay due north and south. 
From this part of the coast, where these boulders begin to be 
numerous, the northern horn of Brodick Bay, at the sea-shore, bears 
N. by E. This horn is a continuation of a steep ridge which runs 
up to Goatfell. 
2. To the south of Corrie (about a mile) two boulders of consider- 
able size are situated on a plateau or terrace, which is from 89 to 96 
feet above the sea. 
The largest is shown on fig. 2, plate XIX., A being a horizontal 
section near the base, to show dimensions of the sides and their 
position by compass ; B indicates the position of the greatest mass 
which is at the south end, the highest point there being 15 feet above 
the base. 
The longest axis is in a direction about X. by W. and fe. 
by E. 
I calculated the weight of this boulder to be about 620 tons. 
I omitted to mark the nature of the rock composing these two 
boulders ; but they are, according to my recollection, grey granite. 
Goatfell from their position bears about W. by S., and is distant 
about 3 miles. 
The rocks of the district where these boulders lie are sandstone, 
