THE FRESH- WATER LOCHS OF SCOTLAND. 97 



the surface above sea-level could not be determined. It was at the time of 

 the survey (November 2, 1906) 2 feet higher than Loch Bradan, which 

 was estimated to be 990 feet above sea-level. 



The surface temperature was 43-0 Fahr., or 1^ less than that of Loch 

 Bradan on the previous day. 



Loch Brndan (see Plate XXXVII.). A small loch, situated high up 

 among the hills, 4 miles west of Loch Boon. The rough moorland 

 surrounding the loch rises more steeply on the south. The shores are 

 stony, with a few exposures of rock. The length is nearly one mile, and 

 the maximum breadth, in the middle of the length, a quarter of a mile. 

 The bottom is nearly flat, with a maximum depth of 8 feet, and a mean 

 depth of 4^ feet. Many banks of stones and single boulders project above 

 the surface. The area is about 82 acres, and the volume 16 millions of 

 cubic feet. The drainage area is about oj square miles, and includes 

 Lochs Cornish and Lure. The water of Girvan enters at the west end of 

 the loch, and flows out northward from the north-east corner. Two other 

 large burns enter on the south side, one of them comiDg from Loch 

 Brecbowie. 



No bench-mark could be found near the loch. The level was estimated 

 at about 990 feet above the sea on November 1, 1906. 



The temperature was 44 '5 Fahr. throughout. 



