50 



THE SALMON RIVERS OF SCOTLAND 



Buchan, it appears that the total catchment basin of Lochs Venna- 

 cher, Achray, Katrine, and Drunkie is about 75'29 square miles, and 

 the mean height above sea-level 1035*185 feet. The rainfall is 

 reduced to cubic feet in each case, and the totals given according to 

 three methods of estimating rainfall described by Dr. Buchan. In 

 comparing in this way the Vennacher catchment with the Lubnaig 

 catchment, the following figures are arrived at : 



1st method 

 2nd method 

 3rd method 



Means in cubic feet 



Vennacher. 

 14,857,214,000 

 14,991,815,000 

 12,424,867,000 



14,091,299,000 



Lubnaig. 

 15,600,760,000 

 15,750,446,000 

 12,737,328,000 



14,696,178,000 



From these calculations, which are no doubt as accurate as can 

 possibly be obtained, it appears that there is rather more water in the 

 Lubnaig than in the Vennacher system, and this in spite of the fact 

 that Loch Katrine is the largest loch in either chain. 



From a table given on p. 213 of the paper already quoted, I 

 extract the following particulars as to the lochs in each chain. It 

 should be noted that Lochs Vennacher and Lubnaig correspond very 

 closely, and that the difference in level between Loch Voil, with its 

 continuation Loch Doine, and Loch Lubnaig is apparently only 9 feet. 



This result clearly supports the view that, if no practical difficulties 

 are found to exist, the opening of the Leny Falls and the storing of 

 the great amount of water which at present runs to waste from Loch 

 Lubnaig, would yield a most hopeful future for the fisheries of the 

 Teith and Leny and the northern chain of lochs. 



With regard to the actual fishing results in recent years it is 

 encouraging to learn that a considerable improvement is noticeable. 

 The best time may be said to be from the opening day (15th January) 

 to the end of April, but much naturally depends on the beneficial 



