314 BATHYMETRICAL SURVEY OP 



be 569*7 feet above sea-level, but the water rose to the extent of 

 9 inches by the 17th, when Loch a' Bhealaich was surveyed. On the 

 15th the water was about its lowest level, and might rise 2 or 3 feet. 

 Loch Coir an Fhearna is quite simple in conformation, with the 

 deeper water lying towards the south-west end that is, towards the 

 peninsula separating it from Loch a' Bhealaich, and the fact that in 

 Loch a' Bhealaich the deeper water also approaches the separating 

 peninsula seems to suggest that the two lochs may at one time have 

 been continuous. The contour-lines all enclose continuous areas, 

 approaching much nearer to the south-west than to the north-east 

 end, indicating a more gentle slope towards the north-east. Thus 

 the 100-feet area is distant about three-quarters of a mile from the 

 north-east end, but approaching to within less than a quarter of a 

 mile from the south-west end, and the maximum depth of 151 feet 

 was observed about half a mile from the south-west end. The slope 

 along the south-east shore is as a rule steeper than along the opposite 

 shore, and this is especially the case off Creag Chraobhach, at the 

 position of the deepest sounding, where a sounding in 46 feet was 

 taken about 50 feet from the shore. This is shown in cross-section G-H 

 on the map. The areas between the contour-lines at intervals of 

 50 feet, and the percentages to the total area of the loch, are as 

 follows : 



to 50 feet 343 acres 46 '6 per cent. 



50,, 100 269 36-5 



100,, 150 124 16-8 



Over 150 , 1 O'l 



737 ,, 100-0 



Temperature observations taken in the deepest part of the loch at 

 1.30 p.m. on October 16, 1902, gave readings of 50-0 Fahr. at the 

 surface, at 20 feet, and at 80 feet, and a reading of 49-8 at 130 feet. 



Loch Syr e (see Plate LXXIV.). Loch Syre lies about 3 miles to 

 the north of the east end of Loch Naver, on the high ground between 

 Strath Naver and Loch Laoghal, the last-named loch being only about 

 1 miles distant to the west. It is an irregular shallow loch, with 

 several islands in it, and the eastern part is full of stones. From east 

 to west it has a length of nearly three -quarters of a mile, with a 

 maximum breadth of over half a mile. Its waters cover an area of about 

 106 acres, and it drains an area of over 5 square miles. The maximum 

 depth of 12 feet was observed in the south-eastern part of the loch. 

 The volume of water is estimated at 25 million cubic feet, and the 

 mean depth at 5J feet. The loch was surveyed on October 1, 1902, 

 when the elevation of the lake-surface was found to be 412-8 feet above 

 the sea; when levelled by the officers of the Ordnance Survey on 



