FBESH-WATEK AQUAEIA. 



to be placed in this position. — ^the worst possible — must, on 

 account of its weight, be small; besides, if full, the surface 

 of water exposed to the air must be extremely limited. 



The ordinaiy oblong tank (Fig. 6), containing four glass 

 sides, is both ornamental and useful. However, in order that 



Fig. 7. 



the fish may be happy and the vegetation kept within bounds, 

 an arrangement of curtains and the like must be made, which 

 will be explained in due course. This aquarium is made of 

 iron and glass or zinc and glass. 



r 



Fig. 8. 



A very useful and somewhat easily-made tank is shown at 

 Fig. 7. It is constructed of glass, wood, and slate. The 

 ends and bottom are of wood, the former being lined with 

 thin window- glass, the latter with slate ; and the sides are 

 formed of plate-glass. 



