THE FRESH-WATER LOCHS OF SCOTLAND. 281 



From the table on p. 280 it will be seen that in the twenty-one lochs 

 under consideration 2619 soundings were taken, and that the aggregate 

 area of the water surface is about 184 square miles, so that the average 

 number of soundings per square mile of surface is 144. The aggregate 

 volume of water contained in the lochs is estimated at about 48,451 millions 

 of cubic feet. The area drained by these lochs is about 307J square 

 miles, or nearly seventeen times the area of the lochs. 



