THE FRESH-WATER LOCHS OF SCOTLAND. 
215 
Loch Morsgail (see Plate LXXXVII.) is a small broad locb near the 
Lead of Little LocL Roag, The neighbouring hills are somewhat distant, 
the immediate surroundings low, except southward, where Scalaval Mula 
rises to 850 feet. The outline is roughly rhomboid, the length a little 
more than half a mile from south to north, the greatest breadth one-third 
of a mile. The basin is simple, of moderate depth, a narrow strip of over 
25 feet in depth lying west of the centre, with a maximum depth of 
31 feet. The mean depth is 12 feet, the area about 65 acres, and the 
volume of water 35 millions of cubic feet. The drainage area is extensive, 
extending to 10 square miles. The principal stream entering the loch is 
the Amhuinn a’ Loin, conveying the drainage of the south side of Beinn 
Mheadhonach. The Amhuinn a’ Ohlachain Mhoire flows out northwards. 
The height of the surface above sea-level could not be measured, but is 
estimated at about 70 feet. 
The temperature at the surface on August 3, 1903, was 60°-l Fahr., at 
15 feet 59°‘l, and at 29 feet 58°*9. 
Loch Stacsavat (see Plate LXXXVI.) is a small triangular loch 
intervening between Loch Suainaval and the sea at Uig. The hills on the 
west rise only about 100 feet above the loch ; on the east they are higher, 
and rise steeply from the shore to 450 feet. It is three-quarters of a mile 
long by one-third of a mile in greatest breadth. It is a simple basin, with 
the 25-feet contour roughly parallel to the shore, and the maximum depth 
of 40 feet about the centre. The mean depth is 17^^ feet, the area about 
87 acres, and the volume 66 millions of cubic feet. The area drained, 
including Loch Suainaval, is nearly 11 square miles. On the south the 
river Eyscleit enters from Loch Suainaval ; the river Forsa, a quarter of a 
mile long, passes northward by a series of small waterfalls into Lon Erista, 
the head of Camus Uig. The surface on the date of the survey, July 25, 
1903, was 35'9 feet above sea-level. 
The temperature varied more than 5° Eahr, from surface to bottom, 
thus : — 
Surface 
61°-8Fahr. 
10 feet 
61°-4 „ 
20 „ 
59°-0 „ 
30 „ 
57°-0 „ 
37 „ 
66°-4 „ 
Considering the water-supply derived 
from Loch Suainaval, it is 
remarkable that the whole series should be so 
much higher than that taken 
in Loch Suainaval on the previous day. 
Loch Suainaval (see Plate LXXXVI.), called locally Suainavat, is a 
large and somewhat broad loch, situated a mile or two south-east of Uig. 
It occupies a narrow steep-sided valley, the hills bounding which are 
highest on the west , while a comparatively low ridge separates it on the 
