46 



Appendices to Eighteenth Annual Report 



Obstructions to the Passage of Fish — 



1. None in either case. 



2. Yes. 



3. None. 



4. Salmon have difficulty in ascending at Mugiemoss and Stoneywood 



Dykes, especially when river low. 



5. No. 



6. No charges under this inquiry. 

 Pollutions — 



1. No fresh causes, but former causes still exist, and sewage naturally 



increases with the population. 



2. As the result of representations by the Board to the Secretary for Scotland 



his Lordship called upon the Town Council of Aberdeen and the Aber- 

 deen District Committee of the County Council of Aberdeen, the 

 respective sanitary authorities of the district at the lower reaches of 

 river, where pollution is worst, to take proceedings under the Rivers 

 Pollution Prevention Act, 1876, against the mill owners and others 

 within their district who were allowing polluting matter to be dis- 

 charged into the river. Both these bodies are themselves to a large 

 extent responsible for the pollution of the river by means of sewage, 

 and no proceedings have as yet been taken by them as directed. It is 

 understood, however, that the Town Council have now in contemplation 

 a scheme for the disposal of the sewage from their district which at 

 present finds its way into the river. The Board also made representa- 

 tions to the Garioch District Committee of the County Council of 

 Aberdeen with regard to the pollution of the river from mills at 

 Inverurie, and as a result the pollution from this source was to some 

 extent decreased. 



The Salmon Disease — 



1. Little disease seen — observed most in November and December. Dis- 



appeared in January. 



2. Low for the winter level. 



3. In October 5 (3 males, 2 females). In November 7 (3 males, 4 females). 



December 13 (7 males, 6 females). 



4. The view here is that it is caused, or at all events increased, by large 



numbers of fish congregating in pools below Mill Dykes, where they 

 may remain for two or three months. 



The Spawning Season — 



1. Early in November. 



2. Between 15th November and 15th December. 



3. End of January 1899. 



4. Slightly above normal level. 



5. Above average. 



5. Kildrummy and Alford Districts. 



Kelts— 



1. Beginning of January. 



2. In February. 



3. Never quite free. 



4. Above normal. 



Smolts — 



1. Towards end of March. 



2. Very good. 



Artificial Propagation of Salmon — 



A small hatchery at Fish Street, capable of receiving from 50,000 to 60,000 

 ova. Stored in January 1899 to its full capacity, and 40,000 

 hatched and put into the rivers at end of May — one-half into the Dee 

 and one-half into the Don, from 10 to 18 miles above Aberdeen. 



Proportion of Male to Female Salmon — 

 No definite information — supposed to be about equal. 



