THE FRESH-WATER LOCHS OF SCOTLAND. 
235 
on tRe nortR shore, and all around rough peat, rugged hills to the west, 
gently sloping moor to the south, and low land to the east, through 
which the Scali burn flows to the Houb, a branch of the Sullom Voe. 
The loch measures half a mile in length, from east to west, and is a 
fifth of a mile broad. It is very shallow, with a mean depth of 
5 feet, and the maximum of 10 feet in the centre. The area is about 
53 acres, and the volume of water about 11 millions of cubic feet. The 
area drained slightly exceeds a square mile. The level was not ascer- 
tained, but is estimated at nearly 100 feet above sea-level. There are 
many boulders in the loch, along the east and north shores. 
The surface temperature on July 24, 1903, was 55°*5 Fahr. 
Boer Water (see Plate XCYIII.) is the largest of the lochs of North 
Eoe. It is nearly, in the centre of North Koe, and close to the foot 
of Eonas hill on its north-east side. It is of roughly oblong form, and 
measures nearly two-thirds of a mile in length, from east to west, 
and one-third of a mile in maximum breadth. It is a very shallow 
flat basin, with a mean depth of only 10 feet, and all, except two very 
small holes, less than 16 feet deep. In one of these holes, towards 
the west end, is the maximum depth of 32 feet ; in the more easterly 
hollow is a solitary sounding of 27 feet, with shallow water all round. 
There is an island near the south-east shore. 
Eoer Water has a superficial area of about 91 acres, and contains 
43 million cubic feet of water. The Burn of Eoerwater flows from the 
east end of the loch some 2 miles south-eastward into Colla firth. The 
drainage area extends to 2J square miles, and includes many small lochs. 
The level at the date of the survey could not be ascertained ; when visited 
by the Ordnance Survey on September 28, 1876, the surface was 349*4 
feet above sea-level. 
The surface temperature on August 7, 1903, was 54°*8 Fahr. 
Gluhbi Shuns (see Plate XCVIII.) is a very small loch lying imme- 
diately to the west of Eoer Water, into which it overflows by a short 
stream. It is of irregular form, and measures a little over a quarter 
of a mile in length, from east to west, by one-sixth of a mile in greatest 
breadth. In area, which is about 16 acres, and in volume, 7 millions 
of cubic feet, it is the smallest of the lochs of North Eoe. The loch is 
very shallow, the greater part of it less than 10 feet deep, only a very 
small area, somewhat east of the centre, exceeding 20 feet in depth, 
with a maximum of 28 feet. The drainage area, of rather more than 
a square mile, includes many very small lochs and the larger Longa 
Water, which were not surveyed. The outflow is to the east, the burn 
passing through a lower loch of Clubbi Shuns (not surveyed) into Eoer 
Water. The level could not be ascertained, but would be somewhat over 
350 feet. 
The surface temperature on August 6, 1903, was 56°*4 Fahr. 
