THE FRESH- WATER LOCHS OF SCOTLAND. 99 
of the loch, and (2) in the deepest part of the northern portion of the 
loch, with the following results : — 
Southern half. 
Northern half. 
o 
o 
Surface 
52-5 
51-7 
5 feet 
51-7 
10 „ 
51-2 
20 „ 
51-2 
25 „ 
50 -8 
40 ,, 
5r-o 
50 „ 
50-0 
75 ,, 
49-5 
These observations indicate a lower temperature throughout the deeper 
water in the northern half, as compared with the shallower water in 
the southern half of the loch ; the range of temperature in the 40 feet 
of water near the southern end amounts to l°-5, as compared with a 
range of 2°*2 in the 75 feet of water in the northern portion of the loch. 
Loch nan Eun (see Plate XXVIII.). — Loch nan Eun (or na-Nean), 
a beautiful but lonely little loch at the head of Glen Taitneach (or the 
Pleasant Glen) amid extremely wild scenery, is well stocked with trout 
said to be as fine as in any river or loch in Scotland. It flows into the 
Shee water at the head of Glenshee. It is surrounded by high hills with 
rounded tops, and grey with bare rock or screes. Its shores are peaty, 
with many small stones and a few large ones. Loch nan Eun trends in 
a north-east and south-west direction, and is very peculiar in outline, 
consisting of a subcircular body with a broad arm, in which are two 
comparatively large islands, and a short narrow arm extending towards 
the north-east. It is nearly half a mile in length, and nearly a quarter 
of a mile in maximum breadth, the mean breadth being one-eighth of a 
mile, or 28 per cent, of the length. Its waters cover an area of about 
37 acres, and it drains an area five times greater, or about one-third of 
a square mile. Over 50 soundings were taken, the maximum depth 
observed being 50 feet. The volume of water is estimated at about 
34,459,000 cubic feet, and the mean depth at 21J feet, or 43 per cent, 
of the maximum depth. The length of the loch is 47 times the maximum 
depth, and 110 times the mean depth. Loch nan Eun is comparatively 
deep, considering its superficial area, and the soundings reveal some 
interesting irregularities of the bottom ; for instance, the line of 
soundings taken across the widest and deepest part of the loch from 
west to east shows that the bottom sinks gradually off the western shore 
to 15, then 46, and then 50 feet (the maximum depth of the loch, 
situated about 300 feet from the western shore), thence rising rapidly 
to 29 feet, sinking gradually to 32 and 33 feet, then rising sharply 
again to 12 feet, and finally sinking to 26 feet at a distance of about 50 
