66 WORK. IN THE HATCHING-HOUSE. 



as, if the water in which they are transported is the least dirty, a 

 large proportion of them will perish. If they are fed on the 

 prepared food up to the day of starting, their stomachs are too 

 distended, and inflammation would be the result. If fed on 

 pounded horse-flesh, the matter they deposit is too gross, and the 

 water becomes fouled. 



Fry stand cold badly, and travel best in the daytime. They 

 may be lightly fed over-night before starting, but not in the 

 morning. 



FRY TRAVELLING TANKS. 



Fry will not stand much knocking about, and if the yearling 

 tanks are used to transport them they must be filled until the 

 water stands above the point of the perforated zinc cone, the 

 wave rising and falling through the zinc is cushioned, and the 

 motion at the bottom of the tank greatly modified. 



The bottom of a tank used for transporting fry should be 

 stiffened by cross-pieces soldered underneath, as, if it saggs at all, 

 the fry soon get fatigued, possibly because the least spring from 

 the bottom frightens them, and they exhaust their strength by 

 frequent and aimless sallies through the water. 



The old tank used to carry the fry from Middlethird to Loch 

 Leven in 1875 answers the purpose well, but the area of the 

 bottom is so small only a few thousand fry can be contained in it. 

 It has, however, the advantage of being light, and can be placed 

 on a dog-cart or the box of a four-wheeled cab, and is perhaps the 

 handiest shape for amateur work. Pieces of wood carrying iron 

 lugs have been bolted on to the side, so that it can be carried 

 between two sticks. Ventilation is provided by little cylinders 

 of perforated zinc soldered round an aperture in the lid and 

 guarded by its handle. This in practice has been found 

 sufficient. 



CABBOYS 



are used by some pisciculturists, and, when well filled with 

 water, there is no jar ; they keep a very equitable temperature, 



