AND FISHING. '2 C J 



when wishing to leap so great a height, they strike 

 the surface of the water with a kind of double 

 stroke ; by this means they overcome obstacles 

 which appear insurmountable. One cause of the 

 salmon's return to fresh water is from a parasitic 

 insect, called lerncea salmonea, which adheres to 

 their scales, and appears to cause an intolerable 

 irritation. This species of louse dies soon after 

 the salmon has been two or three days in fresh 

 water. Angler in Ireland. 



The salmon fisheries are constant and copiou 

 sources of human food. They rank next to agri- 

 culture. Their increase does not lessen other 

 articles of human sustenance. Marshal. 



The salmon fisheries of Scotland were of great 

 value, but they have for the last twelve or fifteen 

 years decreased. They were, however, let to 

 tenants, and much over-fished ; so much so, that 

 the late Duke of Sutherland took them into his 

 own possession, built extensive curing-houses, 

 preserved the rivers during close time, and so 

 regulated the fishing that free access was given 

 to the heavy or breeding-fish, and the kelts, or 

 spawned fish, were allowed to return unmolested 

 to the sea. The consequence of this good ma- 

 nagement is, that in some rivers the produce has 

 been doubled. It is a mistaken opinion that the 

 spawning season is only between October and 



