230 THE TROUT 



After these days of total abstinence and con- 

 finement the fish will be in prime condition for 

 travelling, and you will thus avoid the necessity of 

 changing the water during the journey, a change 

 which has so often proved fatal. 



Yearlings and two-year-olds, unlike the fry, travel 

 best in frosty weather. When on the point of de- 

 parture the fish are transferred to the large specially 

 made zinc carriers which appear in the illustration. 

 Fish-carriers are constructed according to various 

 patterns, many of them very ingenious, and some of 

 them very fanciful in design. The principle of them 

 all is to make the shaking and vibration of the 

 vehicle do the work of aeration. The water is 

 allowed to splash about in such a way that enough 

 fresh oxygen is taken in from the air to compensate 

 for the oxygen taken out of the water by the fish's 

 gills. 



Ice has been used for travelling fish in warm 

 weather, but I do not recommend it. The objection 

 is that when, at the end of their journey, the fish are 

 suddenly turned out into water of higher temperature, 

 there is some danger of inflammation of the gills 

 resulting. 



A very serviceable fish-carrier, for want of any- 

 thing better, is to be found in one of those large, 



