204 
BATHYMETRICAL BURYEY OP 
From the table on pages 202 and 203 it will be seen that in the 
thirty-nine lochs under consideration 3751 soundings were taken, and that 
the aggregate area of the water-surface is 8| square miles, so that the 
average number of soundings per square mile of surface is 433. The 
aggregate volume of water contained in the lochs is estimated at 302(3 
millions of cubic feet. The area drained by these lochs is about 45 J 
square miles, or about five times the area of the lochs. 
