HOW TO MAKE VIVARIA. 27 
account should animals be placed in the same case with others of 
which naturally they would live in fear. For example, Frogs and 
Toads should not be confined with certain Snakes, nor Lizards 
and Newts with Bull-frogs, nor Alligators with small fresh-water 
tortoises. 
In the construction of Vivaria, all chance of the captive’s 
escape should be avoided as far as possible. For it is rather 
mortifying to realise the loss of a valuable Snake, or of a favourite 
Lizard ; nor does one get much encouragement in a hobby of this 
kind should he be often obliged to ask the ladies or servants of 
his home if they may happen to have seen anything of the missing 
Reptiles. 
It is well to keep in each case a little thermometer, which can 
be bought for sixpence. 
