8 BATHYMETRICAL SURVEY OF 



than along the opposite shore, and at the mouths of the inflowing streams 

 banks of alluvium are being laid down. The majority of the soundings 

 gave depths of 5, 6, and 7 feet, the area of the lake-floor covered by more 

 than 5 feet of water being about 65 acres, or 56 per cent, of the total area 

 of the loch. The temperature of the surface water at 11.30 a.m. on 

 October 3, 1902, was 50-8 Fahr. 



Loch Truid air Sgithiche (see Plate II.). Loch Truid air Sgithiche 

 (or Truderscaig) lies at the base of Ben Armine, amid beautiful surround- 

 ings, about 9 miles from Kinbrace station, on the Highland Kailway. It 

 is a splendid trout loch, but the fishing is preserved. In outline it is 

 triangular, with the apex pointing in a north-east direction. The out- 

 flowing stream, the Allt an Loin Tharsuinn leaves the loch at the apex 

 of the triangle, and flows into Loch nan Cuinne lying about a mile to the 

 north-east. Loch Truid air Sgithiche is nearly a mile in length, with 

 a maximum width of nearly two-thirds of a mile, the mean breadth being 

 one- third of a mile. Its waters cover an area of about 186 acres, and 

 it drains an area of about 8 square miles. The maximum depth of 12 feet 

 was observed about halfway down the loch, but towards the eastern shore. 

 The volume of water is estimated at 47 million cubic feet, and the mean 

 depth at rather less than 6 feet. The loch was surveyed on October 18, 

 1902, but the elevation above the sea could not be determined ; when levelled 

 by the officers of the Ordnance Survey on August 23, 1870, the elevation 

 of the lake-surface was 425*9 feet above sea-level. The boatman stated 

 that the water might rise about a foot above, and fall a foot below, the 

 level on the date of the survey. 



Loch Truid air Sgithiche is on the whole shallow and flat-bottomed, 

 with weeds growing in the Western angle of the loch. Only four of the 

 soundings gave depths exceeding 10 feet, and these lie towards the eastern 

 shore, the deepest sounding in 12 feet having being recorded about 200 yards 

 from that shore. The majority of the soundings were taken in depths 

 between 5 and 10 feet, as is borne out by the following table showing 

 the areas between the contour-lines and the percentages to the total area 

 of the loch : 



Feet. Acres. Per cent. 



Oto5 72 ... 38-5 



5 ,,|10 101 ... 54-3 



over 10 13 7-2 



186 ... 100-0 



The temperature of the surface water at 1 p.m. on October 18, 1902, was 

 44-5 Fahr. 



Loch nan Cuinne (see Plate II.). Loch nan Cuinne (or nan Cuidhean, 

 or na-Cuin, known locally as Bimsdale Loch) is closely connected with 

 Loch a' Chlair and Loch Baddanloch, the outflow from Loch nan Cuinne 



