THE FRESH-WATEK LOCHS OF SCOTLAND. 
77 
LOCHS OF THE SEIL BASIN. 
Loch Sell is the only loch draining into Seil sound which was sounded by 
the Lake Survey. 
Loch Seil (see Plate XXX.) lies little more than a mile south-west 
from Kilninver, to the south of the entrance to Loch Feochan. It trends 
north-north-east and south-south- west, and is two-thirds of a mile in 
length, the maximum breadth being about one-sixth of a mile, and the 
superficial area about 50 acres, while the area draining into it is about 
three-quarters of a square mile. The loch is comparatively deep, the 
maximum depth being 91 feet, and the mean depth 37 feet, the volume 
of water being estimated at 79 million cubic feet. The basin is simple, 
the sides sloping towards the centre, 'where the deepest water was found. 
The loch was surveyed on June 3, 1903, when the elevation was found 
to be 55T feet above the sea; the Ordnance Survey officers determined 
the elevation on July 25, 1898, as being 54'8 feet above sea-level. 
Temperature Observations . — Serial temperatures taken in the deepest 
part of the loch gave the following results : — 
Surface ... 
59°-0 Fahr. 
10 feet ... 
• •• 
58°-8 „ 
15 „ ... 
54°-l „ 
20 „ ... 
52°-l „ 
40 „ ... 
50°-2 „ 
80 „ ... 
• •• 
48°-0 „ 
The range from surface to bottom was 11°, the greatest fall being 
one of 4°-7 between the depths of 10 and 15 feet — a fall nearly equal 
to 1° per foot of depth. 
