propose the following scale : No. 1, three acres; No. 2, 

 four acres; No. 3, five acres: making altogether twelve 

 acres of water, which, after the first three years of their 

 stores, will produce an annual income from each pond in 

 rotation. 



To stock the ponds with brood the following simple cal- 

 culation is sufficient for direction ; viz., to every acre of 

 water in extent, put in 200 brood carp, 20 brood tench, 

 and 20 brood jack ; thus making 10 per cent, each of tench 

 and jack to the carp ; the brood must be all of one season's 

 spawn. Therefore to three acres there will be 600 carp, 60 

 tench and 60 jack, and the succession ponds are to be 

 stocked in like proportions, the second the year following 

 the first, and the third again a year later, so that each pond 

 then comes round in its turn to be fished. 



This first outlay constitutes the whole expense, save and 

 except the guarding against poaching, as there will always 

 be a superabundant quantity of brood or store to restore 

 the stews, and sufficient left for sale. 



It is a well-authenticated fact that no fish of prey will 

 ever touch tench ; so it is also understood that tench act 

 medicinally to other fish, by rubbing against them when 

 wounded or sick. This quality is probably attributable to 

 the glutinous, slimy quality and properties of its skin, for 

 when fish have been wounded by the fangs of another, or 

 struck by a hook, they have been frequently observed and 



