THE FRESH - WATER LOCHS OF SCOTLAND. 
295 
The lower 50-feet basin is about 8 miles in length, extending from 
within a quarter of a mile from the southern end as far as the entrance 
of the Allt a’ Chairr Bhig. Separated from this lower basin by an 
interval of more than half a mile there is a second small 50-feet basin 
based upon soundings of 60, 70, and 80 feet. Proceeding up the loch 
from this small basin there is an interval of nearly 3 miles before 
Bartholomew 
0 1 2 3 4 5 
-S° English Miles 
FIG. 48. INDEX MAP OP THE SHIN BASIN. 
meeting with the upper 50-feet basin, which is miles in length, and 
approaches to within three-quarters of a mile from the head of the loch. 
The lower 100-feet basin lies about 2 miles from the foot of the 
loch, and is about 2 miles in length ; the maximum depth recorded in 
this basin was 140 feet, observed in two different places. Separated 
from this lower basin by an interval of miles lies the central 100-feet 
basin, enclosing the deepest part of the loch, which is about 2 miles 
in length. The remaining two small 100-feet basins are situated 
towards the head of the loch, the larger, distant about 1| miles from 
the head, being 1 mile in length, and having a maximum depth of 
129 feet, separated by an interval of half a mile from the smaller, based 
