248 BATHYMETRICAL SURVEY OF 



to 25 feet 78 acres 55*4 per cent. 



25,, 50 49 34-3 



Over 50 , 15 . 10'3 



142 , 1000 



Temperature Observations. The following serial temperatures were 

 taken at 3 p.m. on July 8, 1902, in the deepest part of Loch Dilate : 



Surface 62 '3 Fahr. 



10 feet ... 62-3 



20 62-3 



25 6l-5 ,, 



30 55 -3 



50 ... 53-3 



This series shows a constant temperature from the surface down 

 to a depth of 20 feet, a slight fall of 0-8 between 20 and 25 feet, then 

 a very rapid fall of 6 0> 2 between 25 and 30 feet (a fall exceeding 1 per 

 foot of depth), and a further fall of 2 between 30 and 50 feet, the 

 extreme range of temperature being 9 Fahr. 



