THE FRESH- WATER LOCHS OF SCOTLAND. 
43 
Corr-scriach, and is nearly 2 miles in length ; the maximum depth in this 
basin, 97 feet, was observed near the southern end of the basin off Eilean 
nan Corr-scriach. A third small 50-feet basin occupies the extreme north- 
western end of the loch, and has a maximum depth of 78 feet observed 
near the north-eastern shore. Within the main 50-feet basin the bottom 
sinks in three places below the 100-feet line ; (1) a subcircular basin, 
two-thirds of a mile in length, situated in the wide portion of the loch at 
the south-east end, the 100-feet contour-line approaching to within 300 
yards of the shore; (2) an isolated sounding of 101 feet about three- 
quarters of a mile farther down the loch; and (3) about half a mile still 
farther down an irregular basin a mile and a half in length. As already 
indicated, the maximum depth of the loch (144 feet) was observed in both 
of the 100-feet basins numbered 1 and 3, in the former about 530 yards 
from the south-east end of the loch, and in the latter about 220 yards from 
the western shore of the loch at Kudha Dubh. An inspection of the map 
will show how irregular the lake-floor is in the shallower parts of the 
loch, and even in the deeper water several conspicuous undulations of the 
bottom may be observed. The areas between the consecutive contour-lines 
drawn in at equal intervals, and the percentages to the total area of the 
loch, are as follows : — 
Feet. 
Acres. 
Per cent. 
Oto 25 
482 
21-4 
25 „ 50 
581 
25-8 
50 „ 75 
463 
20-5 
75 „ 100 
440 
19-6 
Over 100 
285 
12-7 
2251 
100-0 
It will be noticed that the area between 25 and 50 feet is larger than 
that between the shore and the 25-feet contour, indicating an average slope 
steeper near shore than in depths beyond 25 feet. 
The surface temperatures taken on August 4 and 5, 1902, showed a 
range from 54°*2 Fahr. to 55°T. In winter the loch is covered all over 
with thick ice. 
Buhli Loch (see Plate XYII.). — The Dubh Loch is situated in a corrie 
forming the natural head of the Fionn Loch, surrounded by high and 
steep hills. There is a bend in the outline of the loch, following the 
shape of the corrie, the narrower upper portion trending north-west and 
south-east, while the wider lower portion trends almost east and west. 
The loch is about 1^ miles in length, with a maximum breadth of two-fifths 
of a mile, the mean breadth being a quarter of a mile. Its waters cover 
an area of over 200 acres, or nearly one- third of a square mile, and the 
area draining into it is about square miles. The maximum depth of 88 
feet was observed near the centre of the loch, where the outline commences 
to widen out towards the west. The volume of water contained in the loch 
