HOW TO MAKE VIVARIA. 9 
2ft. high; but if it is not made according to these sizes, it should 
be of this proportion. For the back, laths of wood 2in. wide are 
sawn and made into a frame of the required length and breadth, 
and over it is carefully and evenly nailed the canvas. ‘This 
material, strong and clean-looking, may be cheaply bought of 
most drapers. There are several ways in which the canvas may 
be affixed to the wood, but the following I have found the 
simplest and best: Narrow strips of stout and finely perforated 
zine are cut into lengths of not less than 1ft. These strips should 
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Fic. 1.—SNAKE OR LIZARD CASE FOR SUMMER USE. 
be so narrow that there is down their centre only one row of 
perfect holes. They are nailed over the canvas, along the edges, 
after it has been cut to size, by means of those black pintacks 
which are generally used by haberdashers and upholsterers, and 
which may be put lin. apart. Of course, care must be taken that 
the heads of the nails are larger than the holes in the zinc. The 
two ends and the top of the case should be made in the same way. 
In one of the ends (Fig. 2) there is a wooden door. A is a narrow 
wooden crosspiece ; below it the door is hung by means of two 
slender French nails, which run through the frame-work at either 
