24 THE VIVARIUM. 
front slides (Fig. 14), should be open, as already described, to 
prevent all chance of jamming caused by pieces of gravel. 
Fig. 15 shows a Vivarium made entirely of glass, except the 
bottom and back, which are of wood. The glass sides and top 
are held in position by means of pieces of fine and strong wire 
which run through small holes bored in the glass. The holes can 
be made by the help of a little brace and bit, using as a lubricant 
spirits of camphor and spirits of turpentine. In each sheet of - 
glass, except the lid and in that only two, four holes should be 
pierced at the distance of at least lin. from the edge, two holes 
Y/ fy ae: 
GMI sn fh Lbirxerits 
LRT HL LLL oc Na a NG TCT 
Fig. 15.—USEFUL VIVARIUM, MADE ALL OF GLASS, EXCEPT THE BACK 
AND BOTTOM. 
at the top, one on either side, and two at the bottom in the same 
position. The top opens and closes like the lid of a box, and is 
fastened to the wooden back by means of small hinges made of 
wire. The lid should be about lin. longer than the length of the 
case. <A little wooden ledge runs outside the glass sides at their 
base, against which the sides are pressed and held firmly by a 
board which exactly fills the area of the interior of the case. This 
makes a capital case for small lizards which love and require plenty 
of ight and sun. The little creatures, though excellent climbers, 
cannot escape when the Vivarium is opened. Two very beautiful 
Leopard Snakes (Coluber leopardinus), were placed in the case 
just before it was photographed and are thus represented in the 
illustration. 
