158 
BATHYMETRICAL SURVEY OF 
constriction is shallow and obstructed by weeds ; a small area exceeding 
10 feet in depth runs along the southern shore, the maximum depth 
therein being 13 feet. The wide portion of the loch to the south-west of 
the constriction forms a regular deep basin, the maximum depth of 39 
feet being found in the north-eastern part of the basin. The areas at 
different depths, and the percentages to the total area of the loch, are 
as follows : — 
^ 0 to 10 feet 35 acres 
10 „ 25 „ 12 „ 
Over 25 ,, < 6 ,, 
53 „ 1000 
Loch an Tuirc was surveyed on September 17, 1902, but the elevation 
of the lake-surface above the sea could not be determined ; the elevation 
is apparently slightly under 200 feet. Temperature observations at 
3 p.m. gave identical readings of 53°*0 at the surface and at depths of 
20 and 30 feet. 
65 ’8 per cent. 
23*2 
11-0 „ 
