410 BATHYMETRICAL SURVEY OF 



50-feet area is very narrow, a quarter of a mile long, and a little east 

 of the central line. 



The basin of Loch Garth, which was 1J miles long by nearly half a 

 mile broad, is of irregular shape. The main part of the loch was 

 oblong, but a long, curved, narrower part branched off to the south. 

 The depth is now 91 feet (the maximum for Loch Mhor). The 25-feet 

 contour almost coincides with the shore-line of the original loch. The 

 50-feet contour encloses an area 1J miles in length, and enters the 

 narrow southern branch. This area is broad for half a mile at the 

 north end, but from there south it is a narrow channel. The 75-feet 

 area is one-third of a mile long, by one-fifth of a mile broad. The mean 

 depth of the whole loch is 24 feet. 



Temperature Observations. Series of temperatures were taken in 

 Loch Garth on April 24, and in Loch Farraline on April 25. The 

 higher temperature of Loch Farraline might be due merely to its 

 being taken a day later, as the weather was warm : 



Loch Garth, April 24, Loch Farraline, April 25, 



1903. 1903. 



Surface 42 -0 Fahr 43 -5 Fahr. 



lOfeeb 41-8 ,, 43'2 ,, 



25 , 43 



30 

 40 

 55 



80 



42-4 



41-2 42-0 



,; 42-o 



41 -2 



Loch Bran (see Plate XCL). Loch Bran is situated in the woods 

 above Foyers, from which it is a mile distant. The shores are wooded, 

 with rock showing in places a little way from the water's edge. There 

 are really two basins at the same level, separated by a narrow neck of 

 land. The loch is very narrow, with the centre line strongly curved. 

 Its length, measured in a straight line, is about three-eighths of a 

 mile, measured round the curve, nearly three-quarters of a mile ; the 

 maximum breadth is one-fifth of a mile. The superficial area is about 

 24 acres, and the volume of water 13 millions of cubic feet. The 

 drainage area is only a quarter of a square mile ; the loch receives no 

 streams of any size. The east loch drains into the west loch, and that 

 into the river Foyers by a burn half a mile long. The east loch is 

 much the larger and deeper, but the deep area with a maximum of 

 50 feet is only a little hole in the middle of the loch. The greatest 

 depth in the west loch is 19 feet. The mean depth of the whole loch is 

 12J 'feet. The temperature at the surface on April 30, 1903, was 48-6 

 Fahr.; at 10 feet, 46-2 ; at 20 feet, 45-0; at 25 feet, 42*3 ; and at 

 50 feet, 42-2. 



Loch a' Choir e (see Plate CV.). A little loch lying between Lochs 



