246 
BATHYMETRICAL SURVEY OF 
The areas between the consecutive contour-lines drawn at equal 
intervals, and the percentages to the total area of the loch, are as 
follows : — • 
0 to 100 feet 
2632 acres 
54 "4 per cent. 
100 ,, 200 ,, 
968 ,, 
-0-0 
•200,, :ioo ,, 
711 ,, 
147 
300,, 4(X) ,, 
484 ,, 
10*0 
Over 400 „ 
45 ,, 
0-9 „ 
4840 ,, 
100-0 
This table shows that more than half of the entire floor of Loch Shiel 
is covered by less than 100 feet of water, and about three-fourths by 
less than 200 feet, while only 1 per cent, is covered by water exceeding 
400 feet in depth. The slope of the bottom is on the whole gentle, but 
in certain places deep water was found comparatively close inshore, 
and the consequent crowding of the contour-lines indicates a steeper 
slope than usual in these positions. 
T eni perature Ohservations . — Numerous observations were made on 
the temperature of the surface water of Loch Shiel during the week 
spent on the survey, the range observed being 8°'2, from 54°*2 to 62°*4. 
Three serial temperatures were taken beneath the surface, with the 
following results : — • 
Table of Serial Temperatures taken in Loch Shiel. 
Depth in feet. 
Jaly 5, 1902, 
6 p.m. 
Off Scamodale. 
July 8, 1902, 
Otf Eilean Druim 
nan Laogh. 
July 9, 1902, 
5 p.m. 
3 miles from head 
of loch. 
° Fahr. 
° Fahr. 
° Fahr. 
0 
57 T 
55-9 
56-5 
5 
54-9 
10 
57-0 
54-5 
20 
56-3 
54*4 
56-5 
30 
55-5 
50 
50-2 
54-0 
560 
75 
50-9 
100 
47-0 
47-0 
47-4 
130 
46-2 
200 
45 •7 
45-2 
280 
45*3 
300 
45 -2 
400 
45-3 
In this table the observations are arranged chronologically, but the 
series given in the first column was taken about midway between the 
other two series, the second column, giving a series taken towards 
the foot, and the third column a series taken towards the head, of the 
loch. The central series in the first column was taken three days 
earlier than the others, and is therefore not strictly comparable ; it 
shows a higher temperature in the surface waters, and a lower tempera- 
