THE FRESH-VVATER LOCHS OP SCOTLAND. 257 



that determined by the Ordnance Survey on July 8, 1893, viz. 351*1 feet. 

 The temperature at the surface was 51'0 Fahr., and at 8 feet 50'5. 



Harperleas Reservoir (see Plate CXVI.) lies about 3 miles north-east- of 

 Loch Leven, on the boundary between Fifeshire and Kinross-shire, and is 

 used by the Kirkcaldy and Dysart Waterworks. It is a small artificial basin 

 covering an area of about 40 acres, but relatively very deep, the maximum 

 depth of 4 1 feet being found close to the eastern shore, while one-third of 

 the bottom is covered by more than 25 feet of water. The mean depth is 

 estimated at IS.feet, and the volume of water at 31 million cubic feet. 

 When surveyed on May 10, 1905, the elevation was 848'35 feet above the 

 sea. The temperature of the water varied little, the following readings 

 being recorded : 



Surface 51-0 Fahr. 



10 feet 50-0 



20 49-0 



36 48-7 



Holl Reservoir (see Plate CXVII.) lies about a mile to the south-east 

 of Harperleas, and has been recently made for the further supply of water 

 to Kirkcaldy. Ballo reservoir lying between them had been emptied for 

 repairs in February, 1905, and had very little water in it when visited in 

 May, 1905. Holl reservoir covers an area of about 45 acres and is 

 relatively deep, the maximum being 38 feet and the mean 17 feet, while 

 nearly one-half of the bottom is covered by more than 20 feet of water. 

 On May 16, 1905, the following temperatures were taken, showing a range 

 throughout the body of water of 4 Fahr. : 



Surface 53 0t O Fahr. 



lOfeet 52-2 



20 49-5 



30 49-0 



Kilronquhar Loch (see Plate CXVIII.) lies close to the town of Kilcon- 

 quhar. and about a mile north of Elie on the northern shore of the Firth 

 of Forth. It is sub-circular in outline, and over half a mile in maximum 

 diameter, covering an area of about 95 acres. It is a shallow flat- 

 bottomed basin, the maximum depth being 6 feet and the mean depth 



4 feet, the volume of water being estimated at 16 million cubic feet. 

 When surveyed on May 18, 1905, the elevation was 48 '6 feet above the 

 sea, as compared with 49'4 feet determined by the Ordnance Survey on 

 March 19, 1894. The temperature at the surface was 61 - 5 Fahr., and at 



5 feet 61-0. 



