THE FRESH-WATER LOCHS OF SCOTLAND. 397 



trend, but from the bridge through the east loch to Glen Moriston it 

 runs nearly due north-east. The east loch is much the longer, and is 

 also deeper. 



The West Loch. The west loch lies at a height of 719-0 feet above 

 the sea. It is 1J miles in length, with a maximum breadth of fully 

 one-third of a mile, and a mean breadth of one-fifth of a mile. It 

 consists of three expansions, all running south from the connecting 

 channel, or, in other words, the north shore is unbroken, but two pro- 

 montories break the south shore, separating the loch into three bays. 

 The west bay is extremely shallow, with a maximum of 6 feet. Two 

 islands lie off the mouth of the river, and round these and to the north 

 the loch is overgrown with weeds. The channel joining it with the 

 mid bay has a minimum of 5 feet, but deepens to 9 feet in the east. 

 The mid bay has also a maximum of 6 feet. The channel leading east 

 from it is 12 feet deep. The eastern expansion deepens from west to 

 east, the maximum of 19 feet being close to the shore. The area of the 

 surface is about 153 acres, or a quarter of a square mile, and it receives 

 the drainage of 16 square miles. It contains 40 million cubic feet 

 of water. The river Loyne, of which the loch is merely a series of 

 expansions, conveys the overflow to the east loch, half a mile distant 

 and about 13 feet lower. 



The surface temperature on May 4, 1903, was 47-7 Fahr. 



The East Loch. East Loch Loyne is more than twice as long as 

 the west loch, and is also about twice as deep, but it is much narrower. 

 There are four principal expansions. The western expansion is ex- 

 tremely shallow, having a maximum depth of 7 feet, and on the date of 

 the survey, when the river was in flood, there was a strong current 

 through. There is an island about the middle of it. The channel 

 leading to the second expansion has a depth of 5 to 9 feet. The second 

 expansion is very small, with a maximum depth of 21 feet, and is joined 

 with the third basin by a channel 5 feet deep. The third basin is 

 much the largest, and has more claim to be called a loch, being 1J 

 miles in length, with a maximum breadth of fully a quarter of a mile, 

 and, but for some large and small islands towards the west end, is 

 a simple basin, with contours parallel to the shore. The area over 

 20 feet in depth is over half a mile long, with depths of 35 feet in two 

 places the maximum for the whole loch. The easternmost basin is 

 narrow, two-thirds of a mile long, of uneven bottom, with greatest 

 depths of 20 and 21 feet. The length of the east loch, taken in a 

 straight line between the extreme points, is 2| miles, the greatest 

 breadth is little over a quarter of a mile, and the mean breadth is 

 about one-seventh of a mile. 



The area of the surface is about 272 acres, or nearly half a square 

 mile, the area draining into the loch being about 24 square miles, 

 including the little Loch na Losguinn and West Loch Loyne. The 



