THE FEESH-WATEE LOCHS OF SCOTLAND. 
191 
are two holes 45 feet deep, one to the south-east, the other to the south- 
west, of this heap of stones. The shore and the islands are entirely of rock> 
except at the east end near the outflow, where there are some mounds of 
gravel. The total length of the loch is fully 1| miles, and the greatest 
breadth a little under a mile. The superficial area, two-thirds of a square 
mile, is about equal to that of Loch Geireann Mill, and is only exceeded 
by Lochs Scadavay and Obisary. The volume of water is 199 millions of 
cubic feet. The mean depth is 10 feet. 
Loch Fada has a very small drainage area, square miles, and 
receives only small local burns. The outflow is by a very short stream 
into Loch Galtarsay, whence a river half a mile in length leads into 
Loch an Strnmore. The height above sea-level on May 21, 1904, was 
29-85 feet. 
Loch Veiragvat (see Plate LXXII.). — A small loch to the north of 
Loch Fada. It measures fully half a mile in length by a quarter of 
a mile in greatest breadth. It is of roughly triangular form, broadest 
towards the east end. The outline is simple, little indented. There are 
several islands, the largest near the centre ; and many boulders appear 
above the surface at the west end. The islets at the east end are of rock, 
and rock also appears at a few points on the north shore, and at the west 
end. The large island is low and grassy, and formed of stones. The 
bottom is uneven, the greater part of it covered by less than 10 feet of 
water. The maximum depth of 25 feet occurs in a small hole between 
the island and the north shore. Loch Veiragvat is the highest loch 
surveyed in North Uist. Its height on May 12, 1904, 71-85 feet above 
the sea, is twice that of Loch a’ Chonnachair, the next in elevation. The 
temperature at the surface was 49°-3 Fahr., and at 10 feet 49°-0. 
Loch an Ditin (see Plate LXXIII.). — A tidal loch of exceedingly 
complex form, consisting of five principal expansions, elongated from east 
to west, with many lesser inlets and numerous islands. It is nearly a 
mile long, and two-thirds of a mile in greatest breadth. Some of the 
branches could not be entered. All are shallow, mostly less than 7 feet 
deep, except the northern expansion, which is on the whole shallow, but 
having a hole where the maximum depth is 35 feet. There are two Dims, 
from which the loch takes its name, one in the northern branch, another, 
very well preserved, in the southern expansion. The shores are of rock 
covered with peat. The two lowest basins communicate separately with 
,the sea, and are filled with Fucus^ Zoster a, etc. The uppermost basin 
is very slightly salt, and fresh-water plants (Myriophyllurri) grow in it. 
The level of the loch on May 20, 1904, was 4-5 feet above the sea, and 
there was no difference of level between 10 a.m. and 5 p.m. The tempera- 
ture at the surface was 52°'5 Fahr., at 15 feet 52°-0, and at 35 feet 
50°-5. 
