A BALANCED AQUARIUM 



11 



Practical Exercise. What insects found in your locality might be kept in 

 the lamp chimney cage? 



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wire screen. 



A homemade insect cage. Make 

 the uprights about 24 inches and the 

 sides of the cage 18 inches wide. 

 Place a shallow pan in the bottom, fill 

 it with earth, and put in plants on 

 which the insects may feed. 



A balanced aquarium. Frequently, trips may be made to a 

 stream or pond. In such an event, collect snails and other small 

 mollusks by scraping the muddy bottom of the stream with your 

 dip net. Catch any fish that you can with insect larvae, small 

 water beetles, water striders, or other forms of insect life. Be sure 

 to collect several kinds of water plants, especially those with green 

 leaves under water. 



Use as your aquarium a large clear glass jar of any shape, and 

 cover the bottom with smooth pebbles. Fasten the water plants 

 down by tying small weights to the base of their stems. Use pond 

 water for the aquarium, transferring the fish and other living 

 things directly into it from the jars you brought them home in. 

 Place the aquarium in a well-lighted part of the room, moving it 

 away from the direct sunlight if the growth of the green plants 



