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 



01 2345 



' English Miles 



FIG. 48. INDEX MAP OF THE SHIN BASIN. 



meeting with the upper 50-feet basin, which is 3J 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 1^ 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 l\ 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 



