THE FRESH-WATER LOCHS OF SCOTLAND. 119 



In the middle of the loch towards the north end is a mud islet 2 or 3 

 feet in length and a few inches above the water. Sir Patrick Keith 

 Murray tried to drain the loch, but failed, and subsequently a rough 

 dam was built at the outflow. The burn flowing from Lochan Uaine to 

 Loch Turret passes among a series of very perfect moraine mounds. 

 Lochan Uaine is a small shallow loch, about one-seventh of a mile in 

 length, and covering an area of about 4J acres, with a maximum depth 

 of 10 feet. The volume of water is estimated at 678,000 cubic feet, 

 and the mean depth at 3J feet. Nearly 40 soundings were taken, but 

 some of them have been omitted on the chart for lack of space. The 

 deeper water occurs near the northern end, to the north-west of the 

 mud islet; to the south-east of the islet the depth is under 5 feet. 

 About 80 per cent, of the lake-floor is covered by less than 5 feet of 

 water. Lochan Uaine was surveyed by request on the same day as 

 Loch Turret, June 9, 1903; from spot-level, its elevation above the 

 sea is about 1520 feet. The surface temperature at 2 p.m. was 67'0. 



PondofDrummond (see Plate XXXII.). The Pond of Drummond, 

 within the policies of Drummond Castle, near Crieff, is a pretty 

 artificial loch, well stocked with trout, but strictly preserved; it flows 

 into the river Earn. It trends east and west, and is two-thirds of a 

 mile in length, nearly one-third of a mile in maximum breadth, the 

 mean breadth being one-fifth of a mile, or 31 per cent, of the length. 

 Its waters cover an area of about 91 acres, and it drains an area four 

 times greater, or over half a square mile. Sixty soundings were taken, 

 the maximum depth observed being 12 feet. The volume of water is 

 estimated at 20,157,000 cubic feet, and the mean depth at 5 feet, or 

 43 per cent, of the maximum depth. The length of the loch is about 

 300 times the maximum depth, and 700 times the mean depth. The 

 Pond of Drummond is, on the whole, very shallow; it is only in the 

 small narrow portion at the east end that the depth exceeds 8 feet, the 

 maximum depth of 12 feet having been found in the extreme north- 

 eastern angle of the loch near the outflow. Nearly 99 per cent, of the 

 lake-floor is covered by less than 10 feet of water. It was surveyed on 

 June 18, 1903, but its elevation above the sea could not be determined, 

 because of inability to find bench-mark. The water in the loch was 

 very low, the wooden jetty at the boathouse being 2 feet above water. 

 The temperature of the surface water was 60-0. 



Loch Monzievaird (see Plate XXXII.). Loch Monzievaird (or 

 Ochtertyre), within the grounds of Ochtertyre, near Crieff, flows into 

 the river Earn; it contains pike, carp, and perch, but few, if any, 

 trout. Its shores are said to be all reclaimed moorland, wooded and 

 high on the north side, grassy slopes with scattered trees on the south 

 side. The large island near the north-eastern end of the loch is covered 



