THE FRESH-WATER LOCHS OF SCOTLAND. 



263 



a maximum breadth of 5 miles about 3 miles above the exit of the river 

 Leven at Balloch ; the mean breadth of the entire loch is about 1^ miles. 

 In superficial area Loch Lomond is the largest of all the Scottish fresh- 



5 10 IS 20 



FIG. 27. INDEX MAP OF THE CLYDE BASIN. 



water lochs, being estimated to cover 27j square miles; its nearest rival 

 in this respect is Loch Ness, with 21 J square miles, followed by Loch 

 Awe with less than 15 square miles. The area draining into the loch 



