LIFE ON THE SEASHORE 305 



4. Arrange and label the school museum, making it an up-to-date 

 collection of animals that live in your environment. 



5. Collect and cut sections of small branches from different forest 

 trees in your locality. The sections can be smoothed, varnished, and 

 mounted with leaves and fruits of the tree, thus making a valuable 

 addition to the school museum. 



6. How to Make a Balanced Aquarium. An aquarium can be made 

 by having a tinsmith make a frame of angle tin into which you can 

 cement glass sides and ends cut to fit. A good size is about 8" by 

 12" for the bottom, the sides 6" by 12 ', and the ends 6" by 8". A 

 waterproof aquarium cement can be purchased and the glass 

 cemented into place. It should be left to harden for several days 

 before it is used. 



Stocking the Aquarium. The pond or stream you visit will 

 certainly have several species of water plants or algae. Green 

 plants that live under water are necessary in order that they provide 

 food and oxygen for the animals that live in the aquarium. Blad- 

 der-wort, milfoil, water moss, or some of the slimy pond scum 

 will make useful plants. Snails will act as scavengers and will 

 eat the tiny green algae that may form on the sides of the aquarium. 

 Add stones and sand for the bottom so as to give your insect larvae 

 a place to live and plants to root. Remember crayfish, dragon-fly 

 larvae, and especially the larvae of the giant water bug will eat all 

 living things, so do not try to keep them. Use brook or pond 

 water and be sure not to add city water that has been chlorinated 

 or you may destroy the lives of your pets. Keep records and 

 make observations on the doings of the vaiious inhabitants and 

 you will be surprised how much of interest you will find out about 

 the lives of these tiny neighbors whose presence many people do 

 not even suspect. 



REFERENCE READING 



Downing, E. R., Our Living World. Longmans Green, 1924. 



Fuller, R. T., Walk, Look and Listen. Day, 1929. 



Johnson, M. E., and Snook, H. J., Seashore Animals of the Pacific 



Coast. Macmillan, 1927. 



Macdougal, D. T., The Green Leaf. Appleton, 1930. 

 Mann, P. B., and Hastings, G. T., Out of Doors. Holt, 1932. 

 Mayer, A. S., Seashore Life. New York Zoological Society, New 



York, 1905. 

 Palmer, E. L., Fieldbook of Nature Study. Comstock, 1927. 



H. & W. SCI. 1 21 



