312 
BATHYMETRICAL SURVEY OF 
shows how the bottom rises and falls on proceeding from one end of 
the loch to the other. The 25-feet contour-line is discontinuous opposite 
the entrance of the Allt Gruama Beag, where the deepest sounding was 
24 feet, the water deepening both to the east and to the west. The 
50-feet contour is continuous, enclosing an area nearly 4 miles in length, 
distant from the east end about 1| miles, and approaching to within 
one-third of a mile from the west end ; within this area, however, the 
bottom rises in two places, where soundings of 40 and 43 feet were 
taken. There is a small isolated 75-feet area opposite Cam Gruama 
Beag, based on soundings of 76 and 80 feet, separated from the principal 
75-feet basin by an interval of over a quarter of a mile, in which the 
greatest depth is 62 feet; the main 75-feet area is 2J miles in length, 
and approaches to within three-quarters of a mile from the west end. 
There are two very small 100-feet areas, based upon isolated soundings 
of 100 and 108 feet, the former opposite Gruamamor, the latter farther 
up the loch west of Reidhachaisteil. A short distance to the west of 
the deepest sounding (108 feet) is a rise of the bottom covered by 40 
feet of water already mentioned, and to the north-east near the northern 
shore is a bank covered by only 1 foot of water surrounded by much 
deeper water. Off the southern shore at Coill Ach’ a’ Chuil, towards 
the east end of the loch, is another bank with 6 feet of water on it, 
in close proximity to a sounding of 30 feet. The following table gives 
the areas between the consecutive contour-lines and the percentages 
to the total area of the loch : — 
0 to 
25 feet 
551 acres 
38 T per cent. 
25 „ 
50 
55 
425 „ 
29-4 
5 5 
50 „ 
75 
55 
301 „ 
20-8 
55 
75 „ 
100 
5 5 
167 „ 
11-6 
55 
Over 
100 
55 
9 
0-1 
55 
1446 ,, 
100-0 
55 
Temperature observations taken on September 24, 1902, gave 
readings of 54° Fahr. at the surface, at 25 feet, and at 50 feet; while 
at 80 feet the temperature was 53°-5. 
Loch aJ Bhealaich (see Plate LXXIII.). — Loch a’ Bhealaich (or 
a-Vellich, or Vealloch) lies about 4J miles to the south of the western 
portion of Loch Naver, with Ben Klibreck rising between them. It is 
almost continuous with the larger Loch Coir’ an Fhearna, the connect- 
ing stream between them being only about 200 yards in length, and the 
difference in level less than 2 feet. To the north of the two lochs 
Ben Klibreck slopes gently up to over 3000 feet, while the ground to 
the south is not so high, but much steeper ; so steep is that around 
Loch a’ Bhealaich (which lies in a very fine corrie) that even at noon 
