328 SCHOOL EQUIPMENT AND ITS MANAGEMENT. 



AQUARIUM. 



Under this somewhat high sounding title is here indi- 

 cated the vessel or vessels in which fresh-water animals 

 and plants are kept. According to circumstances it may 

 mean simply a moderately sized glass jar in which there is 

 a supply of water, sand or mud from a neighbouring pond 

 or ditch selected in spring time in the first instance, 

 perhaps because of the minute animal life seen to abound 



Fig. 174. Various types of Aquarium Jars. 



1, consists of wooden frame, slate base, glass sides, and lid of wire gauze. Within 

 are some rough stones rising above the level of the water. Change of water is 

 effected by siphon. This type is suitable for newts, sticklebacks, water beetles, etc. 

 Size about 28 by 18 by 18 inches. 2, glass jar for gnats, etc. ; 3, younger tadpoles ; 

 4, frogs' spawn ; 5, older tadpoles ; 6, water fleas. 



in it. Some of the water weed growing in the pond or 

 ditch should also be included. Of course, if it is so desired, 

 a large tank, which in such a case should be more or less 

 ornate externally, may be used. 



The writer has found that for teaching purposes a series 

 of ordinary glass jars of various sizes, preferably with flat 

 sides, has many advantages, and that such an arrangement 

 is by no means detrimental to the inmates. For a beginner 

 they are certainly most suitable. Such a series is figured 

 above (Fig. 174). 



In these jars the following animal types may be success- 

 fully kept. For particulars of lessons to be taught see 

 p. 182. 



