116 
BATHYMETRICAL SURVEY OF 
The superficial area is about 125 acres, and the drainage area about 6| 
square miles. The maximum depth of 33 feet is centrally situated, the mean 
depth being estimated at 12 J feet, and the volume of water at 68 million 
cubic feet. About 40 per cent, of the lake- floor is covered by less than 
10 feet of water, while a still larger area (about 46 per cent.) is covered 
by water between 10 and 20 feet in depth. The loch was surveyed on 
July 17, 1903, the elevation being 413'85 feet above the sea; the water 
was high at that time — about 3 feet above the normal. The Ordnance 
Survey officers found the elevation to be 415*6 feet above sea-level on 
August 23, 1894. The temperature of the water was practically uniform 
throughout, varying only from 59°*3 to 59°*7 Fahr, 
Loclienhrech Loch (see Plate XLIV.). — This is a small quadrangular 
loch lying between Loch Skerrow and Woodhall Loch, distant a little over 
2 miles from the former, and a little under 2 miles from the latter, into 
which it drains. The length from north-west to south-east is nearly half 
a mile, and the maximum breadth over a quarter of a mile. The super- 
ficial area is about 39 acres, and the drainage area over half a square mile. 
The deepest part lies towards the eastern shore, off which the maximum 
depth of 15 feet was found. The mean depth is estimated at 7J feet, and 
the volume of water at 13 million cubic feet. When surveyed on July 21, 
1903, the elevation was 651*1 feet above the sea; the water might rise 
about 2 feet above, and fall about a foot below, that level. The Ordnance 
Survey found the elevation to be 650*7 feet on April 5, 1894. 
Woodhall Loch (see Plate XLIV.). — This is an elongate loch about 
2 miles west of the river Dee, and about 6 miles north-west of Castle 
Douglas. On the eastern side of the loch are cultivated fields bounded by 
low grassy hills with few trees. The shores are largely of gravel, with 
boulders and exposed rock in places, but are mostly hidden by weeds. The 
loch trends nearly north and south, but with the axis slightly curved, the 
shore-line being much indented, and is 1| miles in length. The maximum 
breadth is about one-third of a mile, and the mean breadth about one-seventh 
of a mile, the superficial area being about 168 acres, or a quarter of a 
square mile. The drainage area is nearly 9 square miles, including that 
of Lochenbreck Loch. The maximum depth of 49 feet was found towards 
the northern end. The mean depth is estimated at nearly 20 feet, and the 
volume of water at 144 million cubic feet. The loch was surveyed on 
July 28, 1903, the elevation being 172*65 feet above the sea; the water 
was low at that time, and might rise 3 or 4 feet higher, a drift-mark being 
observed 2 feet above the surface. The elevation was 174*3 feet above sea- 
level on August 4, 1894, when visited by the officers of the Ordnance 
Survey. The outflow is a broad stream flowing first northward, then east- 
ward to join the river Dee. The basin is, on the whole, simple, the 
contour lines being continuous, but the longitudinal section shows one 
