THE FRESH-WATER LOCHS OF SCOTLAND. 
323 
line a strikingly sinuous character. The 100-feet area has a length 
of three-quarters of a mile, approaching comparatively very close to 
the southern shore, where a sounding in 115 feet was recorded about 
150 yards off shore. The 125-feet area exceeds half a mile in length, 
and the small 150-feet area, based upon soundings of 151, 152, and 157 
feet, occupies an approximately central position. Along the eastern 
shore the slope of the bottom is in places very steep. Off Creag na 
Luath-ghaire a sounding of 40 feet was taken about 80 feet off shore, 
and another sounding in 49 feet about 70 feet off shore, while off Creag 
an Dithreibh one sounding was taken in 65 feet about 100 feet off shore, 
and another sounding in 65 feet about 60 feet off shore. This last- 
mentioned sounding gives an angle of slope exceeding 45°, the fall 
exceeding 1 foot per foot. The areas between the consecutive contour- 
lines at equal intervals, and the percentages to the total area of the 
loch, are as follows: — 
0 to 50 feet 
204 acres 
42 ’9 per cent. 
50 „ 100 „ 
150 „ 
31-4 „ 
100,, 150 „ 
113 „ 
23-9 
Over 150 ,, 
9 ,, 
1-8 „ 
476 ,, 
100-0 
Temperature Observations. — A series 
of temperatures taken in the 
deepest part of the loch 
on the date of the survey gave the following 
results : — 
Surface ... 
54° -0 Fahr. 
25 feet 
53° -5 ,, 
50 „ 
53°-0 „ 
100 „ 
52°-5 „ 
125 „ ... ... 
48°-6 „ 
145 „ ... 
48°-4 „ 
This series shows a range of 5°*6 from surface to bottom, the greatest 
fall of temperature occurring beyond the depth of 100 feet — a fall 
equal to about 4° between 100 and 125 feet. 
