4 



Fresh Water Aquarium 



Fig. 



other forms they have certain disadvantages, 

 which should be considered, if the amateur 

 wishes to provide a suitable home for his 

 pets. In the first place, they break or crack 

 very easily and apparently 

 without any other reason 

 than a sudden change of 

 temperature, or when there 

 is sunshine on one side and 

 shade on the other. In 

 fish jar. such a case repairing is 



impossible. Then too, the picture which 

 they give of their contents, while not as dis- 

 torted as that from the globe, is more or less 

 indistinct and unnatural, so that they are not 

 advisable, where careful observation is in- 

 tended. 



Far better are the square or oblong aqua- 

 riums, made in one piece of clear strong 

 glass, as they give a distinct and true pic- 

 ture of their contents, allowing good and 

 unobstructed observation. These, like the 

 previous ones, also break and crack easily 



