THE FRESH-WATER LOCHS OF SCOTLAND. 
173 
is not quite so simple in conformation as the eastern one, the 100-feet 
area having a central constriction in its outline with deeper water on 
both sides. The 50-feet area is IJ miles in length, approaching to 
within 200 feet of the western end of the loch. The 100-feet area is 
nearly a mile in length, with a depth of 103 feet in the central con- 
striction, deepening to 130 feet to the west, and 146 feet to the east, 
of the constriction. The areas between the consecutive contour-lines, 
and the percentages to the total area of the loch, are as follows : — 
0 to 
50 feet 
352 acres 
43 ’6 per cent. 
50 „ 
100 „ 
306 „ 
38-0 
100 ,, 
150 „ 
145 „ 
18-0 
Over 
150 ,, 
4 ,, 
0-4 
807 „ 
100 0 
Loch Lurgain was surveyed on September 5 and 9, 1902. The 
elevation of the lake-surface above the sea could not be determined, 
but when levelled by the Ordnance Survey officers on August 9, 1870, 
the level was found to be 173'0 feet. 
Temperature Ohservations . — Temperature observations were taken 
in the deepest part of the loch at 3 p.m. on September 9, 1902, with 
the following results: — • 
Surface ... .. .. ... ... ... ... 56° T Fahr. 
50 feet ... .. ... .. ... ... .. 55°'5 ,, 
100 „ 52° 0 „ 
140 „ 50°-3 „ 
This series shows a range of temperature amounting to 5°*8, there being 
a fall of 3°-5 between 50 and 100 feet. The range was greater than 
that observed in any other loch in the district, even in Lochs Assynt, 
Skinaskink, and Bad a’ Ghaill, which are all deeper than Loch Lurgain. 
Loch Bad a^ Ghaill (see Plate XLI.). — Loch Bad a^ Ghaill (or 
Baddegyle) lies immediately to the north-west of Loch Lurgain, with 
which it is connected by the little Loch Bada na h-Achlaise, and about 
IJ miles to the south-east of Enard Bay. The ground to the north and 
west is comparatively low. An Stac and An t-Sail rising to the east and 
south. The loch is over 2 miles in length, with a maximum breadth of 
three-quarters of a mile, the mean breadth being nearly half a mile. 
Its waters cover an area slightly exceeding one square mile, and it 
drains directly an area of 4| square miles, but since it receives the 
outflow from Loch Lurgain its total drainage area is over 17 square 
miles. Over 150 soundings were taken, the maximum depth observed 
being 180 feet. The volume of water is estimated at 1,767,582,000 
cubic feet, and the mean depth at 62 feet. Loch Bad a’ Ghaill is cut 
