74 



FISH FARMING 



bows would appear to thrive best' in this country, at least 

 in a higher temperature, more especially if the water is pro- 

 ductive of much natural food, as high temperature waters 

 generally are. 



INLET 



FOR AIR 



FOR AIR 

 AND YYATfcR 



Fig. 21. Section of Aerating Contrivance. 



Should your water supply be derived entirely from springs 

 close by, then you may make it more suitable before it enters 

 your fishery by running it through serpentine channels, which 

 may be planted with watercress here and there and formed 

 into " broken water " after a similar manner to that recom- 

 mended for a natural stream. By running through serpentine 

 channels the water covers more ground, which is just what 

 is wanted. 



