of Edinburgh, Session 1882-83. 
193 
Monday, Mh June 1883. 
Mr ROBEET gray, Vice-President, in the Chair. 
The following Communications were read 
1. The Diurnal Oscillations of the Barometer. Part II. 
By Mr A. Buchan. 
2. Ninth Report of the Boulder Committee. Communicated 
by Mr Milne Home. 
\.— NOTES BY CONVENER, 
Argyleshire, 
I. \Wi July 1882, Stonefield Bouse, Argyleshire, residence of 
C. G. Campbell, Esq. — Was guided by Mr Alexander of Lochgilp- 
head, to the hills of Glen Ralloch, situated to the north of the 
narrow neck of land which connects East and West Loch Tarbert. 
The rocks of the hills are gneiss, full of quartz veins. When 
among those hills, I saw many boulders of small size lying on the 
sides, and some on the very tops. Their composition, resembling 
clay-slate, differed from the rocks, and they were all more or less 
angular. They were mostly on slopes facing, or exposed to, westerly 
points. 
On reaching a hill on the north side of West Loch Tarbert, and 
sloping down due south towards the loch, at an angle of about 
40°, and at a height above the sea of 400 feet, fell in with a 
boulder lying on the surface, 7 x 5 J x 3 feet. The rock, visible 
almost directly under, and at all events very close to, the boulder, 
was a schistose clay-slate, but with a sprinkling of gravel over 
its outcrop. The boulder could not probably come from the 
north, as the hill in that direction rises to a height of about 200 feet 
above the boulder, and is steeper near the top. The directions from 
which the boulder might most easily have come are S.E., S., or 
S.W., this last being the line of the arm of the sea called West 
Loch Tarbert. The hills to the west, and still more to N.W., 
appeared too high to have allowed the boulder to have come across 
them. 
