280 BATHYMETRICAL SURVEY OF 



365 feet indicates a shoaling of the water to 346 feet, followed by a 

 deepening of the water to 354 feet, which is well brought out in the 

 cross section C-D on the map. The longitudinal section A-B shows the 

 rapid deepening of the water on proceeding from the north-west end, 

 and the gradual shoaling of the water on approaching the opposite end 

 of the loch. The areas between the consecutive contour-lines, and the 

 percentages to the total area of the loch, are as follows : 



to 100 feet 454 acres 38 '1 per cent. 



100,, 200 309 25-8 



200,, 300 ,, 269 22-6 



Over 300 , 161 13'5 



1193 100-0 



The comparatively large area of the lake-floor covered by more than 

 300 feet of water indicates the flat-bottomed character of the deeper 

 part of the loch, and this is also shown by the comparatively great 

 width of the 200-feet and 300-feet basins, and is well seen in the cross 

 section C-D. 



Temperature Observations. An interesting series of temperatures 

 was taken in the deepest part of Loch Glass at 6 p.m. on August 27, 

 1902, as given in the following table: 



Surface 54 C '7 Fahr. 



50 feet 51-7 



100 46-2 



150 43'5 



250 42-5 



350 ... 42-3 



This series shows a range of temperature from surface to bottom 

 amounting to 12-4, the greatest fall being one of 5 0> 5 between 50 and 

 100 feet. The temperatures taken in Loch Achilty six days earlier gave 

 a higher temperature from the surface down to 30 feet than was 

 observed at the surface of Loch Glass, but a lower temperature at 50 

 and 100 feet, the differences being respectively 5-7 and l-3. 



Loch Morie (see Plate LXIII.). Loch Morie (or Muilie) lies less 

 than 2 miles to the north of Loch Glass, with the crests of Meall Beag 

 (2121 feet) and Meall Mor (2419 feet) rising between them. It is an 

 important and deep loch, containing trout, but the fishing is preserved. 

 Lochs a' Chaoruinn and Loch Magharaidh, which flow into it, could 

 not be sounded for lack of boats. It trends in a north-west and south- 

 east direction, with a slight sinuosity in its outline. It is 2J miles 

 in length, with a maximum breadth of over half a mile. Its waters 

 cover an area of nearly a square mile, and it receives the drainage from 

 a large tract of the mountainous country to the north-west, the area 



