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between Kelso Bridge and the sea, where kelts congregated, 

 and would very likely eat smolts nine inches long. He had 

 just heard that this disease had reached the Don, but it 

 was very unusual for it to break out in an almost epidemic 

 form at this time of the year. With regard to parasites, 

 he found that although many fish bore them they seemed 

 to occasion very little inconvenience unless the fish were 

 out of condition at the time. A fish exhausted or spawning 

 was nearly always infested with parasites, and would very 

 readily fall a victim to them. 



The motion have been carried unanimously, 

 Prof. HUXLEY in reply said he knew nothing as to the 

 effect of sun light, but should imagine that the elevation of 

 temperature must play a considerable part in inducing 

 the condition of fish which allowed it to take the disease. 

 He had been much interested in what Lord EXETER had 

 said respecting the limey character of the water of his 

 district, because when this Exhibition was opened all the 

 trout and some other fresh water fish in the new tanks 

 with one consent began to show disease, and, that they still 

 showed it, might be seen by the specimen on the platform 

 taken from one of those tanks. In fact he had an oppor- 

 tunity of studying in the Aquarium the fungus on one of 

 these fish, and satisfying himself that it was exactly the 

 same thing as the salmon disease. That interested him 

 very much in consequence of a remark made by Mr. Saville 

 Kent who had paid considerable attention to these subjects. 

 He said to him, as they walked round the Aquarium, that 

 that it was a matter of course, because the water had not 

 been allowed to run sufficiently long through the newly 

 cemented reservoirs and tanks, and whenever that was the 

 case the Saprolegnia was almost certain to make its appear- 

 ance. That opened up to his mind a very interesting 



