The Aquarium 29 



ners upon a few pieces of rubber or cork. 

 To empty the aquarium of the water, a 

 piece of rubber tubing about two and a half 

 times as long as the depth of the aquarium 

 is necessary. The vessel which is to receive 

 the water should be placed on a considerably 

 lower level than the bottom of the tank to 

 be emptied. One end of the tube is then to 

 be placed fairly close to the bottom of the 

 aquarium, the other end is bent on the out- 

 side slightly below the level of the bottom 

 of the aquarium. Suction with the mouth 

 at this end will start the flow. Anyone who 

 may object to this method can fill the tube 

 with water, closing the outer end tightly 

 by pressure with the fingers, sink the open 

 end into the aquarium and bend the outer 

 part of the tube as low as its length will 

 permit. The water will flow out as soon as 

 the pressure is removed. 



