118 BATHYM ETHICAL SURVEY OF 



feet, and at 35 feet, while in the deepest part of the loch the following 

 readings were recorded : 



Surface 53-2 Fahr. 



10 feet 53-2 



25 53-2 



50 53-2 



60 

 70 

 75 

 90 



52-2 

 45-2 



440.3 



440.5 



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 

 1J 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^ 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 0< 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, 189-i. 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 



