THE FRK>H-\VATKK LOCHS OF SCOTLAND. 153 



taken, the maximum depth observed being 7 feet. The volume of water 

 is estimated at 17,751,000 cubic feet, and the mean depth at nearly 

 5 feet. Loch Awe is thus very shallow, a large part being overgrown 

 by weeds and rushes; the maximum depth of 7 feet was observed in 

 two places in the northern portion of the loch. It was surveyed on 

 September 23, 1902. The elevation above the sea was determined, by 

 levelling from bench-mark, as being 504 feet. This is almost identical 

 with the level observed by the officers of the Ordnance Survey on 

 September 6, 1871, viz., 504-1 feet. The temperature of the water was 

 found to be uniform at 53'5. 



Loch Beunnach (see Plate XXXVI.). Loch Beannach lies about 

 two miles to the west of Loch Assynt and four miles from Lochinver. 

 It flows into Loch Bad nan Aighean (which was not sounded), thence 

 by a short stream into the river Inver after leaving Loch Assynt. It 

 is most irregular in outline and in conformation, with numerous islands, 

 the majority of which are thickly wooded and give to the loch a beautiful 

 appearance. Loch Beannach is 1J miles in length, with a maximum 

 breadth of less than one- third of a mile (or about 530 yards), the mean 

 breadth being about one-seventh of a mile (or about 250 yards). Its 

 waters cover an area of about 117 acres, and it drains an area ten 

 times greater, or nearly two square miles. Over 60 soundings were 

 taken, the maximum depth observed being 38 feet. The volume of 

 water is estimated at 67,348,000 cubic feet, and the mean depth at 13 

 feet. As already indicated, the floor of the loch is very uneven. It falls 

 in four places below the 20-feet level, the deepest part of the loch being 

 in the south-western portion, where three soundings exceeding 30 feet 

 were taken, the maximum depth of 38 feet having been observed about 

 100 feet to the north of the small island lying off the southern shore, 

 indicating in this position a slope of 1 in 2'6. The area of the lake-floor 

 covered by less than 25 feet of water is about 105 acres, or 89 per cent, 

 of the total area of the loch. Loch Beannach was surveyed on Septem- 

 ber 19, 1902. Its elevation above the sea could not be determined, but 

 must be between 230 and 280 feet. The highest drift-mark observed 

 was 3 feet above the level of the water on the date of the survey, and 

 the boatman stated that the water might fall about 2 feet lower ; thus 

 a range in the level is indicated of about 5 feet. The temperature of the 

 surface water was 52-5, and at a depth of 30 feet 52-0. The range 

 of temperature throughout the body of water was thus very small. 



Loch Druim Suardalain (see Plate XXXVI.). Loch Druim 

 Suardalain lies about a mile to the east of Loch Inver and half a mile 

 to the east of Loch na Doire Daraich, into which it flows by the Uidh 

 a' Bhalgain. Its principal feeder is the Amhainn Bad na h-Achlaise, 



