HOW TO MAKE VIVARIA. 19 
neither a fixed interior tank nor a fountain is necessary, though 
they have many advantages. The soil, drainage, and the planting 
of ferns and the like, will be described later on. The Vivarium 
should be painted with Aspinall, or some similar colouring. 
ETP PATS DN a ia abalhy tu velo os forma. 
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Fic. 10.—VIVARIUM FOR TORTOISES, ALLIGATOR, BULL-FROGS, &c. 
The case which is illustrated in Fig. 10 is suitable for Tortoises, 
a small Alligator or Crocodile, Bull-frogs, or animals which oc- 
casionally need water kept at a temperature higher than that of 
the outside air. By means of a little paraffin lamp, the water in 
the tank within the case can be maintained at a heat of about 
FIG. 11.—PLAN OF THE INTERIOR OF FIG. 10. 
A, Tank; B, Platform; c, Wooden Ladder; D, Pipes connected with Outside 
Boiler ; E, Emptying Pipe; F, Small Boiler. 
80deg. Fahr. The platforms (Fig. 11) are level with the top of 
the tank. The Vivarium should be made according to the size of 
the animals to be kept in it. There is glass both in front and at 
the back. The front piece is arranged to slide to and fro; and 
c 2 
