THE FRESH-WATER LOCHS OF SCOTLAND. 407 



head of the glen, 6 miles south of Loch Killin, is Loch na Lairige, which 

 was not visited. The height above sea-level is about 1044 feet. 



Loch Killin is of very moderate depth, with a flat bottom. More 

 than half the area of the loch (58 per cent.) is covered by less than 

 25 feet of water. The area over 25 feet in depth is all south of a 

 little rocky point on the west shore, and is fully half a mile long, the 

 contour following the shore closely. The area over 50 feet in depth, 

 a quarter of a mile long, approaches close to the foot of the cliffs on 

 the west, and the maximum sounding of 67 feet is not far from shore. 

 The mean depth is 24 feet. 



FIG. 64. LOCH KILLIN, LOOKING SOUTH-EAST. 



(Photograph by Mr. G. West. From"Proc. Roy. Soc. Edin.," by permission of the Council.) 



The temperature on April 24, 1903, was almost uniform throughout 

 surface, 36-9 Fahr. ; 50 feet, 36-8. 



Loch nan Losganan (see Plate CHI.). A mere shallow pond with 

 a maximum depth of 7 feet. It is narrowly triangular, its axis curved, 

 and is narrow and elongate to the west. It lies about 4 miles south of 

 Foyers on Loch Ness, and is connected by a small burn with the river 

 Foyers. Though from its elongate form it is not quite the shortest 

 in the Ness basin, in all other respects it is the smallest. In length 

 it is nearly one-third of a mile, and its greatest breadth is one-tenth 

 of a mile. The superficial area is only about 7 acres, its volume only 

 1 million cubic feet, and its drainage area a quarter of a square mile. 



The temperature of the water on April 21, 1903, was 42-8 Fahr. 



