THE FRESH-WATER LOCHS OF SCOTLAND. 
3 
laid down by the Allt Smeoral projects into the loch, the deepest water to 
the south-east being 59 feet, and to the north-east 64 feet, while on the 
shoaling the greatest depth observed was 50 feet. There are two 50-feet 
basins : the larger, in the most northerly expansion of the loch, is three- 
quarters of a mile in length, and the smaller, in the third expansion from 
the foot of the loch, is one-third of a mile in length. The areas between 
the contour-lines, and the percentages to the total area of the loch, are 
as follows : — 
Feet. 
Acres. 
Per cent. 
0to25 
376 
67-2 
25 „ 50 
130 
23-2 
over 50 
54 
9-6 
560 
100-0 
Temperature Observations . — Several readings at the surface on the date 
of the survey gave a range of 1°’5 Fahr., from 44°*3 to 45°*8, and a series 
taken in the deepest part of the loch at 4-15 p.m., gave the following 
results : — 
Surface .. 
10 feet .. 
20 „ .. 
45 „ .. 
65 „ .. 
45°-8 Fahr 
45°-8 „ 
46°-0 „ 
45°-0 „ 
45°-0 „ 
This series shows a range of only 1° from surface to bottom, while 
lower readings were recorded at the surface than beneath the surface, so 
that the body of water was evidently in process of being cooled down from 
the summer maximum to the winter minimum. 
