The Transport of Live Fish. 127 



is little, if other important matters be carefully 

 attended to. In the winter season, and with 

 small numbers, it is comparatively easy to 

 transport them to any reasonable distance, but 

 in summer the risk is enormously increased. 



The plan that I adopted, with great success, 

 was to put the fish into cans resembling the 

 milk-cans used by dairymen for carrying their 

 milk. A perforated lid, besides the cover, was 

 used to prevent the fish from being carried 

 out with the current, when changing the 

 water ; and the cans could be placed under 

 a tap or stream, if necessary, during the 

 journey, without the fish being able to get 

 away. The cover was also perforated, to give 

 a free supply of air. In the transit of fish, as 

 already stated, the most important point is 

 to keep up a constant supply of air in the 

 water. It is found that water is composed of 

 rounded globules, which admit of a certain 

 quantity of air in the interstices. Fish require 

 oxygen, which they respire by their gills, 

 which fulfil the functions of the lungs in the 

 mammalia. When all the air (tbe quantity 

 of which is very limited) which is contained 

 in a vessel of water has been deprived of its 



