THE FRESH- WATER LOCHS OF SCOTLAND. 211 



the lower end, and 9 feet near the upper end. The mean depth is nearly 

 4 feet, the area 43 acres, and the volume, 7 millions of cubic feet, shows 

 it to be the smallest loch surveyed in Lewis. A small burn flows east 

 to Loch nan Deaspoirt. The height above sea-level was 82*9 feet on 

 August 14, 1903. 



Loch a' CUachain (see Plate LXXXI.) is a narrow loch about 4 miles 

 west of Stornoway, the land surface on which it lies rising gradually to 

 the west. In form it is narrow and oblong, measuring fully half a mile in 

 length from east to west, and one-fifth of a mile in breadth. It is shallow 

 and nearly flat-bottomed, with only a very small area near the east end 

 over 10 feet deep, and the maximum 11 feet. The mean depth is 5J feet, 

 the area 45 acres, and the volume 1 1 millions of cubic feet. The drainage 

 area is extensive, including the whole upper waters of the Creed and 

 several lochs, and measures 12 square miles. The loch is an expansion of 

 the Creed, which flow in at the west end, and out at the east. The 

 surface was 211*6 feet above sea-level on July 10, 1903. The temperature 

 at the surface was 56*9 Fahr., and at 10 feet 56*8. 



Locli Vatandip (see Plate LXXXI.) is a small narrow loch 4 miles 

 west of Stornoway. The hills to north and south rise about 100 feet above 

 the loch. The length from east to west is exactly a mile, and the greatest 

 breadth one-fifth of a mile. It is a simple, shallow, and even basin, the 

 10-feet contour closely following the shore, the bottom nearly flat, and 

 the maximum depth of 17 feet near the east end. Very narrow for 

 two-thirds of its length, it expands, one-third of a mile from the west end, 

 into a triangular portion. The mean depth is 10 feet, the area about 64 

 acres, and the volume 27 millions of cubic feet. The drainage area is less 

 than half a square mile. From the west end a small burn flows west into 

 the river Creed. When surveyed on July 11, 1903, the surface was 275*9 

 feet above sea-level. 



Loch Airidh na Lie (see Plate LXXXII.) is a small narrow loch, 1J 

 miles west of Stornoway. Low hills lie to north and south : on the south 

 some 100 feet, on the north 15<> feet, above the level of the water. It 

 measures three-quarters of a mile from east to west, and one-sixth of a 

 mile in greatest breadth, near the lower end. The bottom is regular and 

 even, the sides sloping gently to the middle, and the depth gradually 

 increasing from west to east, with the maximum of 19 feet near the 

 outflow. The mean depth is 9 feet, the area about 47 acres, and the 

 volume 19 millions of cubic feet. The area draining into the loch is 

 nearly 3 square miles, a considerable stream, the Amhuinn a* Ghlinn 

 Mhoir, flowing in at the west end. The Bayhead river flows out eastward 

 through the town of Stornoway. The level of the loch on the date of the 

 survey, July 9, 1903, was 178-7 feet. The surface temperature was 55*8 

 Fahr., at 15 feet 55'7. 



