of Edinburgh, Session 1879-80. 
577 
4. Sixth Report of the Boulder Committee. 
(Plates XVII., XVIII., XIX.) 
The materials for this Report have been obtained from the Con- 
vener, Professor Forster Heddle of St Andrews University, William 
Jolly, Esq., H.M. Inspector of Schools, Inverness, and William 
Wallace, Esq., High School, Inverness. 
To make the descriptions of the boulders more intelligible, 
it has been found necessary, as in former Reports, to annex a few 
diagrams, which will be found at the close of the Report. 
I. NOTES BY CONVENER. 
Argyleshire. 
1. In consequence of information in the schedule issued by the 
Committee, and filled up by Mr Montgomery, schoolmaster at 
Southend , near Campbelton, I went to Southend, and had pointed 
out by Mr Montgomery boulders at several places there. 
Mr Montgomery considered these boulders to be granite. If 
granite, they were different from any I had ever before met with. 
They were certainly an igneous or primitive rock of some kind, and 
composed of different ingredients, the chemical nature of which I am 
unable to state. There appeared to be crystals of white felspar. I 
could detect no mica. The general mass was a whitish-grey colour. 
These boulders were pointed out to me at many places. I saw 
two in the River Conn (about half a ton in weight), one on Penny- 
serach farm (3 or 4 tons), another on the adjoining farm of Bruneri- 
can (1|- ton), another at Macherioch (about half a ton in weight). 
I heard of many more lying on the sea-shore adjoining these farms. 
I was assured by Mr Montgomery, and by the tenants of these 
respective farms, that there was no rock in the south end of 
Cantyre similar to that of these boulders. 
Along the east coast between Campbelton and Southend, a dis- 
tance of 8 or 10 miles, I descried many boulders of the same 
nature ; and in a gravel pit near Campbelton gas-work, I saw the 
fragments of another, which had weighed probably 3 or 4 tons. 
In this same gravel pit I found a boulder of grey porphyry, con- 
4 B 
VOL. x. 
