L{Sca?mi^ate ' ' .yiester^ 
1 
Shurrery \ 
lAHempnj^ 
^.More 
U- Leumh* . ^ 
ychlamhain 
^msdqu 
ilmsdale 
2 BATHYMETRICAL SURVEY OF 
Loch Brora is extremely irregular in conformation, varying greatly in 
width, with corresponding undulations of the lake-floor. There are four 
basins, in which the depth exceeds 30 feet. Proceeding from the foot of 
the loch the first, smallest, and shallowest basin has a maximum depth of 
31 feet. Passing through the first narrows, where a depth of 7 feet was 
observed, one enters the second expansion of the loch, which is shallow 
until Eilean nam Faoileag is passed, the second basin lying to the north of 
PIG. 1. — index map of the BEOEA, HELMSDALE, WICK, WESTEE, HEILEX, DUNNET, 
THUESO, AND FOESS BASINS. 
that island, and having a maximum depth of 43 feet. Passing through the 
second narrows, where a depth of 9 feet was found, one enters the third 
and deepest basin, enclosing the maximum depth of 66 feet, which was 
recorded approximately near the centre of the basin. Passing through the 
third and most northerly narrows, in which depths of 4 and 7 feet were 
recorded, one enters the fourth and largest basin ; this basin is cut into 
two portions by the slight shoaling of the bottom where the alluvial cone 
English Mi/es 
10 
