MANAGEMENT OF AQUAEIUMS 237 



will do well under such circumstances, provided 

 the water-temperature during July and Au- 

 gust does not rise too high. I have seen this 

 fish carried successfully through both these 

 months without the aid of ice or a refrigerat- 

 ing apparatus, by simply increasing the aera- 

 tion of the water. Many native fishes common 

 to the brooks and waters in the neighbourhood 

 of the home make desirable and even pretty 

 denizens of an aquarium ; and they are of com- 

 paratively easy culture. The yellow perch, the 

 sun-fish, the cat-fish, and the stickleback will 

 do well in a still-water aquarium. Nearly all 

 forms of minnows are as well adapted to the 

 aquarium as the goldfish, which, by the way, be- 

 longs to the minnow family. 



Choosing or Building an Aquarium. The 

 best and most convenient form of aquarium 

 is an oblong tank of glass and metal. An all- 

 glass aquarium is not as desirable or as safe. 

 The globe shape is not as easily kept clean and 

 an all-glass vessel is very apt to crack and 

 break owing to the unequal expansion and con- 

 traction from varying temperatures of the 

 room and the water. 



