30 



FEESH-WATEB AQUARIA. 



first is quite firm. This cement sets very quickly. When all 

 the corners have been cemented, with the spoon pour sufficient 

 of the mixture on the bottom to cover it, and then the 

 aquarium, after standing an hour, will be ready for use. 



After a little practice, several aquaria, such as the one just 

 described, can be made in a morning. If carefully constructed, 

 they look very neat, and will not leak, unless perhaps when 

 placed for a long time within reach of the rays of a vei-y 

 hot sun — a position which is not fit for any aquarium. Even 

 under these circumstances probably the tank would not leak 

 at all, but the pitch would begin to melt. The zinc-work of 

 these small cabinet aquaria may be painted with Brunswick 

 Black or vrith Aspinall's Enamel. Instead of the pitch-cement, 



Fig. 32. Cheaply-made All-glass Aquarium for Insects. 



mixed red and white lead can be substituted, and after it is 

 quite dry covered with Aspinall's Bath Enamel. When the 

 red and white lead are used the aquarium must be well 

 soaked before it is stocked. 



Tanks made according to the above directions should not be 

 of greater dimensions than 16in. long, 12in. wide, and Sin. deep. 

 Those of the largest size should be placed on the bottom shelf 

 of the cabinet. In fact, these tanks ought to be constructed 

 according to the shelves, and should stand at least 2in. 

 apart when placed in position, in order that they may be 

 easily moved. 



Fig. 32 represents another useful and easily-made little tank 

 •which is very suitable for the cabinet aquarium. This small 



