THE FRESH-WATER LOCHS OF SCOTLAND. 201 



The area enclosed by the 200-feet contour is nearly 10J miles in 

 length, extending from about a mile from the west end to about one- 

 sixth of a mile from the east end of the loch. 



The area enclosed by the 100-feet contour is over 11 miles in length, 

 extending from one-fifth of a mile from the west end of the loch to a 

 short distance from the east end. 



The area covered by less than 100 feet of water is 2784 acres. The 

 areas between the consecutive contour-lines and the percentages to the 

 total area of the loch are as follows : 



to 100 feet 2784 acres 42 -2 per cent. 



100,, 200 863 13-1 



200,, 300 528 8'0 



300,, 400 488 7'4 



400,, 500 331 5-0 



500 600 331 5-0 



600,, 700 547 8 -3 



700,, 800 ,, 111 1-7 



800,, 900 ,, 530 8-0 



900 ,, 1000 ,, 79 1-2 



Over 1000 , 4 , O'l 



6596 ,, 100-0 



These contour-lines of depth approach each other very closely in 

 many places, showing that the slopes are very steep at these points. A 

 little to the west of the promontory called " Rudha nam Faiseachean ' ' 

 on the south shore, south-east of the islands, this is very marked, the 

 slope being as much as 1 in 2J. Farther east on the south shore, off 

 "Eilean Allmhara," the slope is again very steep, as it also is off 

 Brinacory island, which lies almost opposite on the north shore. 



As the surface of the loch is only 30 feet above sea-level, almost 

 the entire bed of the loch is below the level of the sea. The area 

 draining directly into Loch Morar is over 33,800 acres, or about 52 

 square miles. 



The volume of water contained in the loch is estimated at 

 81,486,000,000 cubic feet, and the mean depth at 284 feet. Although 

 Loch Morar is the deepest loch, Loch Ness has a volume three times 

 as great, and its mean depth is 436 feet. 



The deepest Scottish lochs next to Loch Morar are 



Loch Ness .. ... ... ... ... ... 751 feet. 



,, Lomond .. 623 ,, 



,. Lochy '... 531 



,, Ericht 512 



Tay 508 ,, 



In the sea to the west of Morar there is no depth approaching 1000 

 feet, with the exception of a deep spot of 834 feet (139 fathoms) between 



