210 BATHYMETRICAL SURVEY OF 



(August 11, 1903) the surface was 95 4 2 feet above sea-level. The tempera- 

 ture was uniform at 58'0Fahr., identical readings being recorded at the 

 surface, 20 feet, and 40 feet. 



Loch Cuil Airidh a' Flod (see Plate LXXX.) is a small narrow loch of 

 irregular form, being really an inlet from Loch Trealaval on its south 

 side. It is nearly a mile in length, and a quarter of a mile in maximum 

 breadth. It is shallow, with a maximum depth of 9 feet and a mean depth 

 of 4J feet. The superficial area is about 61 acres, and the volume of 

 water 12 millions of cubic feet. The drainage area, including Loch 

 Airidh na Ceardaich, is scarcely 1 square mile. At the north end it joins 

 Loch Trealaval by a broad channel, and is connected with Loch Airidh na 

 Ceardaich, which is very slightly higher in level, at the south end. 



Loch Airidh na Ceardaich (see Plate LXXX.) is a small loch to the 

 south of Loch Trealaval, with which it communicates through Loch Cuil 

 Airidh a' Flod. It is of very irregular shape. The length is scarcely 

 two-thirds of a mile, and the greatest breadth a quarter of a mile. The 

 maximum depth is 22 feet, and the mean depth 6 feet. The area is about 

 36 acres, and the volume 9 millions of cubic feet. The area drained 

 measures one-fifth of a square mile. When surveyed, the surface was only 

 an inch higher than Loch Cuil Airidh a' Flod, with which it is connected 

 at the south-western extremity. 



Loch nan Deaspoirt (see Plate LXXX.) is a small triangular loch 

 between Balallan and Laxey, on the north shore of Loch Erisort. To 

 north and south many little hills rise from 100 to 200 feet above the 

 loch. The length from north-west to south-east is three-quarters of a 

 mile, and the greatest breadth, at the extreme south end, a quarter of 

 a mile. It is a simple basin, increasing in depth from north-west 

 to south-east, to the maximum of 56 feet, a quarter of a mile from the 

 lower end. The depth continues over 40 feet to close to the south end. 

 The mean depth is 21 feet, the area about 55 acres, and the volume 50 

 millions of cubic feet. The drainage area, including Loch Dhomhnuill 

 Bhig, is a little over a square mile. A small burn, a quarter of a mile 

 long, comes from Loch Dhomhnuill Bhig, and a similar burn goes east 

 to the head of Loch Valtos. The level was 59-2 feet on August 14, 1 903. 

 The temperature at the surface was 58'0 Fahr., at 25 feet 58-0, and at 

 48 feet 57-0. 



Loch Dhomhnuill Bhig (see Plate LXXX.) is a small narrowly tri- 

 angular loch, about 1 mile to the north of Loch Erisort. The low hills 

 bordering the loch rise to between 200 and 250 feet, or over 150 feet above 

 the surface. The length from north-west to south-east is a little over half 

 a mile, the maximum breadth, at the south end, a quarter of a mile. The 

 loch is shallow, being 4 feet in the middle, and deepening to 8 feet near 



