THE FEESH-WATER LOCHS OF SCOTLAND. 
277 
Surface 
5 feet 
10 „ 
15 ,, 
25 „ 
50 „ 
75 „ 
100 „ 
180 „ 
55°-9 Falir, 
55°-0 „ 
50°-5 „ 
49°-5 „ 
47°-0 „ 
45°T „ 
45°-0 „ 
44°*8 „ 
44°*1 „ 
The range from surface to bottom was the greatest fall being one 
of 4°'5 between 5 feet and 10 feet, or nearly 1° per foot of depth. 
Loch an Leoid (see Plate CXXIII.) lies about 2 miles north-west of Loch 
Awe at Kilchrenan, and drains into the neighbouring Loch an Droighinn, 
and thence into Loch Awe by the Kilchrenan burn. It is separated from 
Loch Nant, distant about half a mile to the west, by a very low-lying 
divide, little more than 100 feet above the lochs at its highest part. Loch 
an Leoid is almost rectangular in outline, and trends in a north-east and 
south-west direction, the length being half a mile, the maximum breadth a 
quarter of a mile, and the superficial area about 73 acres. The greatest 
depth of 84 feet was recorded near the southern end. The volume of 
water is estimated at 114 million cubic feet, and the mean depth at nearly 
36 feet. The loch was surveyed on May 22, 1903, the elevation on that 
date being 602*2 feet above sea-level, nearly identical with that observed 
by the Ordnance Survey officers on August 27, 1864, viz. 602*1 feet. The 
basin is rather irregular ; across the centre of the loch there is a slight 
shallowing, with deeper water both to the north and south, a sounding in 
79 feet being recorded about 300 yards from the northern shore, and the 
deepest sounding in 84 feet about 200 yards from the southern shore. 
Temperatures taken in the deepest part show a range of 2°*2 Fahr. from 
surface to bottom, the greatest fall being observed between 50 and 
7 5 feet : — 
Surface ... 
25 feet . . . 
50 „ ... 
75 „ ... 
48°*5 Fahr. 
48°*2 „ 
47°*6 „ 
46°-3 ,, 
Loch an Droighinn (see Plate CXXIlI.).-—Loch an Droighinn (or Loch 
Wrenj lies immediately to the east of, and runs parallel with, its neigh- 
bour, Loch an Leoid. It is over half a mile in length, and covers an 
area of about 50 acres. The maximum depth of 48 feet is centrally 
placed, but rather nearer to the north end. The volume of water is esti- 
mated at 32 million cubic feet, and the mean depth at nearly 15 feet. 
The loch was surveyed on May 25, 1903, when the elevation was 601*65 
feet above sea-level ; when determined by the Ordnance Survey officers 
on August 27, 1864, the elevation was 601*0 feet above the sea. There 
are two 20-feet basins, the one to the south of the central island having 
