THE FKESH-WATER LOCHS OF SCOTLAND. 
55 
maximum depth of 44 feet was observed, from the small western 50-feet 
area, based on soundings in 51 and 58 feet, distant about 200 yards from 
the western end of the loch. The 25-feet contour encloses a continuous 
area from end to end, coinciding approximately with the shore-line. Off 
the southern shore, about half a mile from the western end, were some 
sunken rocks and stones covered by 1 to 2 feet of water. The following 
table gives the approximate areas between the contour-lines, and the per- 
centages to the total area of the loch : — 
Feet. Acres. Per cent. 
0to25 121 ... 43 
25 „ 50 104 ... 38 
50 ,, 75 37 ... 13 
Over 75 17 ... 6 
279 100 
The surface temperature on commencing the survey at 12.30 p.m. 
on August 8, 1902, was 54^*0 Fahr. 
Loch a’ Ghobhainn (see Plate XIX.). — Loch a’ Ghobhainn (or Gouen) 
lies immediately to the north-west of Loch a’ Bhealaich, and about 2 
miles to the west of Loch na h-Oidche. The outflow is carried into Loch 
Gaineamhach, lying about a mile to the west-north- west, which was not 
surveyed because there was no boat on it. Loch a’ Ghobhainn is irregularly 
elliptical in outline, and trends in a north-west and south-east direction, 
being about three-quarters of a mile in length and one-third of a mile in 
maximum breadth. Its waters cover an area of about 98 acres, and it 
drains directly an area of over a square mile, but since it receives the 
superfluent waters from Loch a’ Bhealaich its total drainage area exceeds 
6 square miles. The maximum depth of 28 feet w'as observed approxi- 
mately in the middle of the loch. The volume of water is estimated at 
54 million cubic feet, and the mean depth at 12 J feet. The loch was 
surveyed on the same day as Loch a’ Bhealaich, August 8, 1902, but the 
elevation of the lake-surface above the sea could not be determined ; 
judging from spot-levels and contour-lines on the Ordnance Survey maps 
the elevation of both these lochs must be just above the 1000 feet level. 
Although the 10-feet and 20-feet contours enclose continuous areas, the 
floor of Loch a’ Ghobhainn is rather irregular, especially in the south- 
eastern half of the loch, as evidenced by the sinuous character of the 
contours. The deeper water occurs in the north-western portion of the 
loch, and approaches close to the north-west end, a sounding in 27 feet 
having been taken within 100 yards from that end. Near the middle 
of the loch in the vicinity of the deepest sounding a rise of the 
bottom, covered by 15 feet of water and with deeper water on both sides, 
was observed, and similar irregularities occur towards the south-east, where 
a sounding in 6 feet was taken in a central position, and one in 9 feet near 
the south-western shore, surrounded by deeper water. Near the south-east 
