THE FRESH-WATER LOCHS OF SCOTLAND. 11 



deepest sounding in 42 feet was taken about 400 yards from the south- 

 western shore. The area covered by less than 10 feet of water is about 

 154 acres, or 24 per cent, of the total area of the loch, while the area 

 covered by more than 25 feet of water is about 113 acres, or 18 per cent. 

 Temperature observations on the date of the survey gave identical readings 

 at the surface, at 10 feet, and at 25 feet, viz. 48'0 Fahr. 



Loch Allt an Fhearna (see Plate II.). Loch Allt an Fhearna (or Loch 

 an Alltain Fhearna, or Loch Alt-an-Fearn) lies about half a mile to the 

 west of Loch Baddanloch, into which it flows by the Uidh a' Chlarain. It 

 is pear-shaped, narrowing from the south-east towards the north-west, and 

 is nearly a mile in length, with a maximum width of over half a mile, the 

 mean breadth exceeding one-third of a mile. Its waters cover an area of 

 about 212 acres, or one-third of a square mile, and it drains an area of 

 2 square miles. The maximum depth of 36 feet was observed approxi- 

 mately in the centre of the wide part of the loch, that is to say, nearer 

 the south-eastern than the north-western end. The volume of water is 

 estimated at 132 million cubic feet, and the mean depth at 14J feet. The 

 loch was surveyed on October 18, 1902, but the elevation of the lake- 

 surface could not be determined ; when visited by the officers of the 

 Ordnance Survey on December 3, 1870, the elevation of the lake-surface 

 was found to be 43 2' 6 feet above the sea. A drift-mark was observed 

 1 foot above the water on the date of the survey. 



Loch Allt an Fhearna is quite simple in conformation, the bottom 

 sloping down on all sides towards the deepest part, which lies in the 

 south-eastern part of the loch, the deepest sounding in 36 feet having been 

 taken about 450 yards from the south-eastern shore. The slope of the 

 bottom is on the whole steeper off shore than in the deeper water, as is 

 shown in the following table giving the areas between the consecutive 

 contour-lines, and the percentages to the total area of the loch : 



Feet. Acres. Percent. 



OtolO 68 ... 32 



10 20 99 ... 47 



20 30 34 ... 16 



0%-er 30 11 ... 5 



212 100 



Temperature observations taken in the deepest part of the loch at 

 2.30 p.m. on October 18, 1902, gave identical readings at the surface, at 

 17 feet, and at 34 feet, viz. 46-0 Fahr. 



Loch na Moine (see Plate II.). Loch na Moine (or Achnamoine) lies 

 about 2\ miles from Kinbrace station on the Highland Railway, and about 

 1J miles to the south-east of Loch Baddanloch, the overflow from which is 

 carried into it by the An Ei' Mhor. It is a small shallow loch, remarkable 



