THP] FRESH-WATER LOCHS OF SCOTLAND. 
347 
sounding in 104 feet was taken about 120 feet from shore; a little 
farther east another sounding in 50 feet was taken about 50 feet from 
shore; still farther east a sounding in 148 feet was taken about 120 
feet from shore; and still farther east a sounding in 87 feet about 
60 feet from shore. The last-mentioned sounding, which gives a slope 
of 29 in 20, was taken on the cross-line immediately to the east 
of the deepest sounding, and the steepest gradient observed off the 
northern shore was at the opposite end of the same line, where a 
sounding in 54 feet was taken at about 60 feet from shore. The cross- 
section C-D on the map is taken at the position of the deepest sounding, 
and shows a gentle offshore slope, succeeded by a steeper slope on 
proceeding into deep water, the deeper part of the loch being of a 
flat-bottomed character. The area enclosed by the 50-feet contour is 
nearly 3 J miles in length, being distant from the west end nearly three- 
quarters of a mile, and extending into the narrow part at the east end 
off Creag Ghrada ; in the expansion of the out-flowing river, opposite 
Creag Dubh, a depth of 64 feet was observed. The 100-feet basin 
is 3 miles, the 150-feet basin 2| miles, and the 200-feet basin over one 
mile, in length. The approximate areas between the consecutive 
contour-lines drawn in at equal intervals, and the percentages to the 
total area of the loch, are given in the following table, from which 
it will be noticed that the area of the zone between 150 and 200 feet is 
larger than that of the two preceding shallower zones : — 
0 to 
50 feet 
293 
acres 
39 per cent. 
50 „ 
100 „ 
134 
55 
18 
55 
100 „ 
150 „ 
99 
55 
13 
,, 
150 „ 
200 „ 
138 
55 
18 
55 
Over 
200 „ 
86 
55 
12 
55 
750 
55 
100 
55 
Temperature Observations . — ^The following series of temperatures, 
taken in the deepest part of the loch at 4 p.m. on the date of the survey, 
shows that the whole body of water varied little in temperature, being, 
in fact, uniform in temperature down to 100 feet, the extreme range 
amounting to only l°-2 Fahr. 
Surface 
10 feet 
25 
55 
50 
55 
100 
55 
150 
55 
170 
55 
200 
55 
49° -5 Fahr. 
49°-5 „ 
49°-5 „ 
49° -5 ,, 
49°-4 „ 
49° -0 „ 
48°-5 „ 
48°-3 „ 
Loeh a! Mliuilinri (see Plate LXXXII.). — Loch a’ Mhuilinn (or 
Moilie) is a small irregular loch lying about 5 miles to the east of Loch 
