TROUT-BREEDING IN WINTER l8l 



first, however, describe what the trough is when 

 adapted for its use. It consists of a receptacle, 

 say, six inches deep, of a rectangular shape, in 

 which the ova are stored, fitted to receive water, 

 and also furnished with a spout from which the 

 overflow emerges. This is how it is made, and I 

 do not think I can be too terse and practical. 

 Take (for our present purpose) three lengths of 

 well-seasoned pine plank half an inch thick by 

 three feet long by ten inches for one, and the 

 others nine inches broad. The ten-inch wood 

 plank will form the bottom, and the other two 

 the sides. Two other ten-inch-by-nine pieces of 

 the same kind of wood are necessary to form the 

 ends. These parts should be put together with 

 copper nails such as boat-builders use, and no 

 corrosion in consequence ensues, as would be the 

 case were iron nails employed. Iron nails will do, 

 however, if the copper are not available. 



After the box has been made so securely that 

 no water can escape, the next operation is that of 

 charring the interior. It is a well-known fact 

 amongst pisciculturists that the charred wood box 

 or trough presents more lively fish than any other 

 kind of apparatus. Well, the charring process is 



