THE FRESH-WATER LOCHS OF SCOTLAND. 67 



Temperature Observations. Serial temperatures were taken in the 

 deepest part of the loch at noon on August 19, 1904, with the following 

 results : 



Surface 59'5 Fahr. 



25 feet 59-0 



50 57-0 



56 54-0 



62 52-6 



75 50-2 



110 48-5 



The total range from surface to bottom was 11, the greatest fall being 

 one of 3~ between 50 and 56 feet a fall equal to half a degree per foot 

 of depth. 



Loclt Twmiait (see Plate XXV.). Loch Tearnait (or Ternate) lies 

 about 4 miles south-east of Loch Arienas, and less than 3 miles east of 

 the head of Loch Aline. The loch trends almost east and west, and is 

 nearly three-quarters of a mile in length, with a maximum breadth of over 

 one-third of a mile. Its waters cover an area of about 106 acres, and the 

 drainage area exceeds 4 square miles. The volume of water is estimated 

 at 75 million cubic feet, and the mean depth at 16 feet. At the east end 

 there is a small island at the entrance of the main inflow, and near the 

 middle of the loch there is another small island. The deepest part of the 

 loch lies to the west of this island, the maximum depth of 39 feet having 

 been found about midway between it and the west end. To the east and 

 south-west of this island soundings in 24 to 28 feet were taken. The loch 

 was surveyed on August 18, 1904, but the elevation above the sea could 

 not bo determined; judging from spot-levels it is apparently about 460 

 feet above sea-level. Temperatures taken in the deepest part of the loch 

 showed a range of less than 2 Fahr. from surface to bottom : 



Surface 59-5 Fahr. 



25 feet 58-0 



37 , 57-6 



