4 6 



The Salmon 



the disease greatly, for the fish keep jumping at these falls con- 

 tinually and cut themselves on the rocks, thus rendering them- 



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selves more subject to the disease. They cannot proceed farther, 

 and the number of diseased fish soon increases, and each new 

 fish on coming among them becomes affected, so that the pools 

 below the falls soon swarm with them. By April they begin 



