vi 



Report on Salmon Fisheries. 



Disposal, who have erected bacterial filters at Mortlach and Cole- 

 burn distilleries for the purification of pot ale and steep water. At 

 the request of this Commission, Mr. Calderwoocl has supervised an 

 experiment to test the direct influence of the purified effluent 

 obtained by the Commissioners' plant upon salmon ova and fry. 

 The complete success of this experiment is referred to by the 

 Inspector in his report, and apparently augurs well for the future 

 treatment of the highly toxic bye-products in question. 



Inspections during 1907. 



The Inspector of Salmon Fisheries has during the past season 

 sriven attention specially to the districts of the Forth, Tay, Lochy, 

 Helmsdale, and Thurso. In his report the various operations 

 which have been accomplished, or are in operation or contempla- 

 tion, for opening up the obstructions to the passage of salmon are 

 specially referred to. Important new fish passes have been 

 erected at the Loch Vennacher Outlet Works and at the new dam 

 dyke at Loch More in the Thurso District. Amongst waterfalls 

 dealt with, we may mention the modification of the Garry Falls at 

 Struan, the removal of the falls of the Tilt above Blair Castle, and 

 more especially the negotiations referred to by Mr. Calderwood as 

 now completed for the erection of a pass at the Falls of Tummel. 



Rentals of Districts. 



The assessable rentals for salmon fisheries in five leading districts 

 on the east coast of Scotland are, since 1900. as follow : — 



Year. 



Tweed. 



Tay. 



N. Esk. 



Dee. 



Spey. 





£ 



£ 



£ 



£ 



£ 



1900, . 





22,548 



6,510 



18,989 





1901, . 





22,558 



6,466 



19,418 



8,608 



1902, . 





22,663 



6,494 



19,455 



8,146 



1903, . 



15,338 



22,648 



6,494 



18,393 



8,147 



1904, . 



15,439 



23,099 



6,494 



19,078 



7,396 



1905, . 



15,499 



22,675 



6,489 



19,332 



8,364 



1906, . 



15,499 



22,838 



6,485 



19,068 



8,740 



1907, . 



15,732 



23,202 



6,490 



18,940 



8,990 



The assessable rentals of the East Coast Districts, exclusive of 

 the Beauiy and the Wick, and including last year's rentals for 

 the Findhorn and Nairn and a sum for the East of Sutherland 

 Districts which does not express the full value owing to the 

 difficulty of separating angling from other sporting values, 

 was in 1907 equal to £107,916. For comparison with recent 



