30 DOMESTICATED TROUT. 



on frames of the same length as the others, but of two-inch stuff 



!"d as wide as the cloth w,ll permit. These screens must be 



ong enough to hold two inches of well-washed coarse g,.veh 



from°hree quarters of an inch to two inches ,n d.ameter. Th 5 



hould be so large that there will be interst.ces between the 



.ravel large enough to let the spawn pass down, .f necessary, to 

 gravel large eno g ^^^^^^ ^^^^ ,^^^_j,^^ „„ 



t^Z ~the"n\;rL the, wiU have to be tahen out and 

 renlaced every few days during the spawmng season 



W en tiese two sits of screens are placed the -hole eng^^h 

 of rt^e race, and all is complete, the water w, 1 pass over all t v o 

 r H..n at the supply end and fifteen inches deep at the 

 Towe'r end'wUl moderate current through the whole race 

 The reader will perceive by the description and diagram t a 

 there is one inch of space between the two screens to hold t e 

 nawn as hey are d posited by the parent trout, with a gentle 

 cu ent^^'shiS over alid under them ; and that the upper screen 

 ; vents the ^pawn from being destroyed ^y -^^^^^^ 

 so that they are perfectly safe unt.l removed to the hatchm, 



''when the trout is ready to spawn, she will enter the race 



