320 
BATHYMETRICAL SURVEY OF 
map. Towards the northern end of the loch lies the second 50-feet area, 
based on soundings of 50 and 51 feet, and of small extent, the greatest 
depth recorded on the ridge separating the two deep basins being 
20 feet close to the eastern shore. The contour of the bottom is shown 
in the longitudinal section A-B on the map. The areas between the 
consecutive contour-lines, and the percentages to the total area of the 
loch, are as follows: — 
0 to 25 feet 
138 acres 
46 ’4 per cent. 
25 „ 50 „ 
78 „ 
26-2 
50,, 75 „ 
74 „ 
24-9 
Over 75 ,, 
7 „ 
2-5 „ 
297 „ 
100-0 
The temperature of the surface water on the date of the survey was 
54° Fahr., and four readings beneath the surface in the deepest part of 
the loch gave identical results, viz. 53° at depths of 10, 25, 50, and 
70 feet. 
