148 BATHYMETRICAL SURVEY OF 



The range of temperature throughout the body of water was thus 15'2, 

 a fall of 8 C< 9 being recorded between the surface and a depth of 50 feet, 

 and a further fall of 2'9 between 50 and 100 feet. 



Loch Davan (see Plate LIV.) lies about 5 miles north-east of Ballater, 

 and in close proximity to Loch Kinord. These two lakes are situated in 

 true " morainic country," that is to say, in hollows of the covering of 

 detritus left on the surface of the country when the ice-sheets retreated. 

 Loch Davan is three-quarters of a mile in length from east to west, the 

 greatest breadth from north to south being nearly two-thirds of a mile, 

 and the mean breadth one-third of a mile. Its waters cover an area of 

 about 146 acres, or nearly a quarter of a square mile, and the drainage 

 area extends to 11 J square miles. The maximum depth recorded was 

 9 feet, three soundings having been taken at this depth towards the south- 

 eastern shore. The volume of water is estimated at 25 million cubic feet, 

 and the mean depth at 4 feet. The elevation could not be determined, but 

 on the date of the survey (July 10, 1905) the surface of the water was 1*7 

 feet below the platform of the boathouse. The loch is in process of being 

 choked up by the water-lilies, which have increased since the Ordnance 

 Survey map was prepared. The 5-feet contour-line approximately indicates 

 the extension of the lilies, about 67 per cent, of the lake-floor being covered 

 by less than 5 feet of water. The temperature of the surface water was 

 66-4 Fahr. 



Loch Kinord (see Plate LIV.). Loch Kinord (or Ceander) lies 

 immediately to the south of Loch Davan, though the two lochs are drained 

 by independent streams. Loch Kinord is a true " lake of the plains/' 

 lying in a depression between low hills composed of moraine matter, which 

 has been thrown down very irregularly. The length of the loch from 

 north-west to south-east exceeds a mile, and the maximum breadth exceeds 

 two-thirds of a mile, the mean breadth being a quarter of a mile. The 

 superficial area is about 186 acres, or over a quarter of a square mile, the 

 catchment area being nearly 3 square miles. The maximum depth of 12 

 feet was recorded near the eastern shore. The volume of water is 

 estimated at 41 million cubic feet, and the mean depth at 5 feet. The loch 

 is irregular both in outline and conformation, and there are many islets 

 composed of boulders. About 56 per cent, of the lake-floor is covered by 

 less than 5 feet of water. The elevation above the sea could not be deter- 

 mined, but at the time of the survey (July 10, 1905) the surface of the 

 water was 1-5 feet below the platform of the boathouse. The temperature 

 of the surface water was 65'9 Fahr. 



Loch of Aboyne (see Plate LII.). The Loch of Aboyne is an artificial 

 one, the embankment at the boathouse having been made to form the loch, 

 which encloses one large and one smaller island. The elevation above the 

 sea could not be determined, but is estimated from spot-levels at about 430 



