118 
BATHYMETRICAL SURVEY OF 
feet, and at 35 feet, while in the deepest part of the loch the following 
readings were recorded : — 
Surface 
10 feet 
25 „ 
50 „ 
60 „ 
70 „ 
75 „ 
90 „ 
53°-2 Fahr. 
53°-2 „ 
53°-2 „ 
53°'2 „ 
52°-2 „ 
45°-2 „ 
44°-8 „ 
44°-6 „ 
Here also the temperature was uniform from the surface to a depth of 
50 feet, but 1°*6 lower than in the eastern basin, the “ sprungschicht ” 
lying between 60 and 70 feet, where a fall of 7° was recorded, the total 
range being 8°*6. 
Loch Harrow (see Plate XLIV.). — This is a small loch lying about a 
mile north of Loch Dungeon, and about 7 miles north-west of Dairy. The 
highest hill in the neighbourhood, Corserine, rises steeply to a height of 
2668 feet to the westward of the loch, which trends east and west, and is 
nearly half a mile in length, with a maximum breadth of about one-fifth 
of a mile, and a superficial area of about 38 acres. It drains an area of 
IJ square miles, the main inflow being the Folk burn entering on the 
northern shore. The maximum depth of 29 feet was observed towards the 
east end, the mean depth being estimated at 11 J feet, and the volume of 
water at 19 million cubic feet. The loch was surveyed on August 3, 1903, 
when the elevation was 811-8 feet above the sea, nearly identical with that 
determined on September 10, 1894, by the Ordnance Survey, viz. 811*6 
feet; the water might rise 2 feet above, and fall a foot below, that level. 
The basin is simple, the deeper water being centrally placed, but towards 
the northern shore. About 52 per cent, of the lake-floor is covered by less 
than 10 feet of water. Temperatures taken at the surface, at 10 feet, 
20 feet, and 25 feet gave identical readings of 58°*5 Fahr. 
Lochinvar (see Plate XLIV.). — This small loch is situated about 3 miles 
north-east of Dairy. It is irregular in outline, trending nearly north and 
south, and over half a mile in length, with a maximum breadth of one-third 
of a mile. The superficial area is about 68 acres, and the drainage area 
1^ square miles. Three soundings were taken at the maximum depth of 
10 feet, two towards the eastern shore, and the third off the western shore 
near the north end. The mean depth is estimated at 6J feet, and the 
volume of water at 19 million cubic feet. The loch was surveyed on 
July 20, 1903, when the elevation was found to be 736*6 feet above the 
sea; the Ordnance Survey found it to be 735*4 feet on July 7, 1894. The 
outflow is by dam and sluice, the water at the time of the survey being 
exactly at the level of the overflow. A drift-mark was observed two feet 
above the water. The loch is flat-bottomed in character, most of the 
