70 



FISH CTJLTUEE. 



shut, but the sides are let down to form a tray" 

 (7), into wMcli the young fish can be removed 

 for rearing. The lower cistern is shown by Fig. 

 2 ; the waste tap at (3), whence the water can 



Fig. 2, 



be drawn off; the supply tap at (5) ; this either into 

 the hatching trays (4, 4, 4), or into the rearing tray 

 (7). The force-pump is indicated at (6) ; (8) is a 

 waste-pipe screwed on to let the water run from the 

 rearing tray into the lower cistern. Kg. (a) shows 

 an enlarged end of each of the trays with the lip, 

 whence the water drips into the next tray. 



