20 POACHING LESS FELT. 



yearly produce being kept up, and the streams still well 

 stocked with the produce of such fish as, in despite of the 

 destroyers, are fortunate enough to reach pure water for 

 spawning, we should, with very little watchfulness on our 

 parts, become so rich in fish, that the markets could be 

 supplied at a low figure, and at a large remunerating return 

 to the proprietors of the waters: so that quantity and 

 quality would thus go together; and I have no hesitation 

 in saying, that this system might be carried out with 

 equal surety of the same large annual return as I laid 

 down as the probable profits of a similar enterprize, in 

 my former Treatise upon fish-ponds for carp, tench and 

 jack. 



As far as salmon are concerned, the arrangement for ar- 

 tificial spawning, breeding and rearing, becomes of such 

 immense importance, that I consider it of national interest 

 and utility. In the beginning of this treatise I have ex- 

 pressed my fears that all fresh-water fish would gradually 

 become extinct, from the several well-founded causes 

 named ; and these are since confirmed by parties who have 

 borne their testimony to the destruction daily going on in a 

 stream where the sewerage of villages is not the principal 

 source of the evil ; and still the eggs are suffocated during 

 the process of incubation. What must not the spawn of 

 every description of fish suffer when it is deposited in the 

 turgid waters passing through large metropolitan towns 



