278 
BATHYMETRICAL SURVEY OF 
Depth in feet. 
August 18, 1901 
(R. M. Clark). 
August 15, 1902. 
° Fahr. 
° Fahr. 
0 
59-3 
54-2 
5 
59-3 
10 
59-3 
54-2 
15 
59-2 
20 
59-2 
30 
54-2 
40 
59-0 
50 
54-0 
55 
55 '4 
60 
54-2 
70 
51-0 
53-5 
85 
49-0 
The 1901 observations show a range exceeding 10°, whereas the 1902 
observations show that the temperature was practically uniform from 
surface to bottom, which may perhaps be ascribed to the influence 
of the strong winds prevailing at the time of the survey, causing a 
thorough circulation in the whole body of water. 
Loch Kinellan (see Plate LXI.). — Loch Kinellan is a small shallow 
loch near Strathpeffer, which was surveyed on August 23, 1902. The 
elevation of the lake-surface was not determined by levelling, but 
from the Ordnance Survey contours it is evidently nearly 500 feet 
above the sea. It trends north-east and south-west, widest in the 
south-western portion, and with a large wooded island near the centre. 
Weeds abound along the western and south-western shores, and also 
between the island and the eastern shore. It is one-third of a mile 
in length, and its waters cover an area of about 15 acres. Soundings 
of 10 and 11 feet were taken to the north-east of the island, but the 
deepest part lies to the south-west, the maximum depth of 16 feet 
having been observed about midway between the island and the 
southern shore; 73 per cent, of the lake-floor is covered by less than 
10 feet of water. The volume of water is estimated at 5 million cubic 
feet, and the mean depth at over 7 feet. The temperature of the 
surface water at 12.30 p.m. on the date of the survey was 58°*7 
Fahr,, and at a depth of 14 feet 58°*3. 
IjocIi Ussie (see Plate LXI.). — Loch Ussie (or Usie) is about a mile 
from Strathpeffer and 3 miles from Dingwall. It is irregular and 
subcircular in outline, with a maximum diameter from north-east to 
south-west of nearly a mile. There is one large island with a heronry 
upon it, and several smaller ones, and weeds are abundant in some 
of the bays and in the vicinity of the islands. It was surveyed on 
August 29, 1902, but the elevation above the sea was not determined 
