80 . BATHYMETRICAL SURVEY OF 
15 and 20 feet — a fall of 5°*4 in the 5 feet of water, or more than 1° per 
foot of depth. 
Loch a’ Ghaoruinn (see Plate XXXI.) is a small shallow loch, lying over 
half a mile to the south-west of Loch Dubh-mor ; weeds are abundant, and 
the bottom is covered by a peaty mud. The loch is irregular in outline, 
trending east and west, and one-third of a mile in length, with a maximum 
breadth across the middle of one-seventh of a mile. The area is about 
18 acres, of which 60 per cent, is covered by less than 10 feet of water. 
The eastern portion is shallow, the deeper water lying in the western half, 
two soundings at the maximum depth of 20 feet being recorded, one in 
a central position, and the other near the west end. The volume is 
estimated at 7 million cubic feet, and the mean depth at feet. The 
elevation could not be determined, but is apparently about 860 feet above 
the sea. On June 5, 1903, the surface temperature was 59°-2 Fahr. 
Loch a Pkearsain (see Plato XXXI.). — Loch a’ Phearsain (variously 
spelt Phearson, Pearsan, or Fearsan, or Parson’s Loch) is situated close to 
Kilmelfort, at the head of Loch Melfort, and is nearly rectangular in 
outline, with a slight curve in the eastern shore-line, which causes a 
narrowing near the middle, where a shallow ridge crosses the loch. It 
trends almost north and south, and is nearly half a mile in length, with a 
maximum breadth of a quarter of a mile. The central ridge divides 
the loch into two basins, the maximum depth of 53 feet being found 
in the southern basin towards the eastern shore, the maximum depth 
in the northern basin being 41 feet. The superficial area is about 61 acres, 
of which about 36 per cent, is covered by less than 10 feet of water, while 
10 per cent, is covered by more than 40 feet of water, the mean depth 
being 19^ feet. The loch lies in a rock-basin, and contains about 
52 million cubic feet of water, the area draining into it being about 3J 
square miles. The loch was surveyed on May 30, 1903, when the eleva- 
tion was found to be 226’0 feet above the sea. The temperature of the 
surface water was 60°*2 Fahr. 
Loch nan Druimnean (see Plate XXXI.). — Loch nan Druimnean (or 
Drimnin) is situated near the head of Loch Melfort, less than half a 
mile to the west of Loch a’ Phearsain. It is a narrow loch, trending 
nearly north and south, and exceeding half a mile in length, its waters^ 
covering an area of about 37j acres. The maximum depth of 59 feet was 
observed near the middle of the loch. The volume of water is estimated 
at 26 million cubic feet, and the mean depth at 15 J feet. The loch was 
surveyed on May 30, 1903, when the elevation was 169’3 feet above the 
sea ; when visited by the Ordnance Survey officers on October 5, 1864, the 
elevation was 170T feet above sea-level. A shallow ridge crosses the loch 
towards the northern end, dividing it into two deep basins, the smaller 
basin at the north end having a maximum depth of 30 feet, while the 
