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THE FRESH-WATER LOCHS OF SCOTLAND. 271 
to the entrance of the river Orchy, the length exceeds 24 miles, and is 
nearly equal to the length of Loch Ness (including Loch Dochfour), 
which most nearly approaches it in this respect. The loch is, on the 
whole, very narrow — less than a mile across, except at the junction of the 
narrow arm with the main body, where, measured in certain directions, 
FIG. 28. — INDEX MAP OF THE ETIVE BASIN. 
the width may be said to exceed 2 miles ; but at other places the width 
diminishes, and at one point is barely a quarter of a mile. The mean 
breadth of the entire loch is about half a mile, or only 2*3 per cent, of 
the length — the smallest percentage observed in any of the lochs sounded 
by the Lake Survey, recorded also for East Loch Scadavay in North List, 
followed by 2-5 per cent, for Loch Shiel, and 3 per cent, for Loch Shin. 
^ English Miles 
5 10 
