62 FEESH-WATER AQUAKIA. 



tke side of the tank as higli as the water is intended to rise. 

 Should there be an objection to cut the table and its cover, 

 the longer pai-t of the pipe (E) can be fastened by means of 

 brackets to the bottom of the aqnarium instead of the inside 

 of the top of the table; and the tubing (H) which is affixed 

 to F may run round the farther edge of the table, and so into 

 the can (C) beneath it. H should be long enough to reach 

 the bottom of the can (C), and so the noise of trickling water 

 will be prevented. The tubing (D) might be brought quite 

 down to the floor, and thence up under the table to its con- 

 nection with E, whether the latter is fastened to the bottom 

 of the aquarium or not. However, there should be an endeavour 

 to hide from sight the tank, the tubing, and the overflow-can." 



There are various ways of forming the jet (I). The easiest, 

 perhaps, is to cut the end of the pipe ofE square with a pair 

 of cutting pincers (this wiU press the edges of the pipe closely 

 together) ; then, with a point of a pin, make the hole or holes 

 required. The object is to procure the flowing upward of the 

 least amount of water with the greatest effect. No more water 

 should be placed in the tank (A) than the can (C) is able to 

 hold, or some time or other there is certain to be a flood 

 in the room. The top of the overflow-pipe (F) should be pro- 

 tected with a little cap made of finely-perforated zinc ; this 

 will prevent insects and pieces of weed being sucked down, 

 and so causing death and stoppage. 



The pipes within the aquarium should be hidden by well- 

 arranged rockwork. A good way to do this is to get a piece 

 of slate about Sin. or 4in. wide, and long enough, when standing 

 on the bottom of the tank touching the front glass, to reach 

 just above the jet (I). It should rest against the overflow-pipe 

 and not on the fountain, or it will interfere with the upward 

 flow of the water ; and for this purpose the former might be bent 

 a little to the front. Care should be taken that the jet points 

 perfectly upright. Pieces of coke can be fastened by means 

 of Portland cement to the slate just mentioned. All one 

 side should be covered with the coke, and an inch or so from 

 each edge of the other side ; the edges also being hidden in the 

 same way. The whole ought then to be dipped in some liquid 



