122 SALMON DISEASE. 



spiders' webs, etc.), which hardens on exposure to the air, and 

 that when the fly wishes to detach its foot from the surface to 

 which it may be adhering, as in the act of walking, it re-dissolves 

 this hardened mucus by emitting a fresh portion from the glands. 

 The hair-like bodies with which the pads are covered are probably 

 hollow tubes — />., ducts to convey the mucus. 



F. J. Allen. 



TLbc Carlisle /llMcroscoptcal Society* 



Salmon ©ieea^c* 



By Dr. Lediard. 



THE ordinary monthly meeting of the Carlisle Microscopical 

 Society was held on Friday night, January 4th, 1884, in 

 the Young Men's Hall, Fisher Street, when Dr. Lediard, 

 the Vice-President, read an interesting paper on " The Salmon 

 Disease," of which the following is a report : — 



The Vice-President said the salmon disease was especially 

 worthy of their consideration. It had even claims upon any 

 Microscopical Society, and more especially this Society, inasmuch 

 as it was a disease which was present in the Eden, and had been 

 so since 1878. As far as he was aware, no clear views on the 

 causation and maintenance of the fungus had as yet been put 

 forth ; season after season passed and salmon was still a prey to 

 its ravages. It was more than likely that the disease was knov/n 

 prior to 1821, but was not studied. Since then, many scientific 

 men, both in this and other countries, had turned their attention 

 to the mode of reproduction of the fungus, and in recent years a 

 Royal Commission sat at Carlisle and many other towns in the 

 district, and obtained much valuable information of all kinds likely 

 to have any bearing upon the origin of the disease. To the 

 report of this Commission he had gone for his information, and 

 his gleanings from the Blue Book, as well as such specimens as he 

 had been enabled to get, must form the bulk of his present paper. 

 That the disease existed in North America, Mr. Byers had testified; 

 moreover, it was a disease well-known to the Indians. This was 



