48 



FISH CULTURE. 



waste pipe. This should be of india-rubher, so as 

 to be capable of being moved at wiU. If a long- 

 spouted funnel be let into the upper end, by the aid 

 of a gas-pipe hook, it can be fixed to one of the 

 supporting beams in the most suitable position to 

 receive the waste water. 



■ Before concluding the description of this indoor 

 apparatus, I append a sketch of the section of a 

 cistern, (a) is the w'aste or stand pipe, by which 

 the cistern can be emptied at will and cleaned out if 

 requisite ; (6) is the supply pipe ; (c) is a tray to catch 



the water in and break its force, or to stop vermin 

 should it be needed for that purpose; {d) is the 

 flexible tube attached to the inside of the tap, floated 

 as shown, and (e) is the tap itself. The indicator 

 spoken of at p. 38, is not shown here, but I will 

 (describe it. A stout zinc box was constructed to act 



