METHOD OF SECURING ANIMALS. 

 Fig. 126. 



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Czermak's Eabbit Holder and Board. A, The board, b, A bent piece of 

 iron forming the upper part of the board, c, An open space through which 

 instruments can be introduced from below to divide the spinal cord. It is 

 generally covered by an iron plate. D is an upright r )d fixed by a screw into 

 a slit in b. y is a forked rod, which can be moved back or forward, up or 

 down, by the nut e. The forks are hollow, so that the ends of the holder can 

 be pass&d into them and fastened by the screwy. A is a bar which passes 

 behind the incisor teeth of the rabbit, g and g' are two bent bars which pass 

 under the chia and over the nose of the animal, and are brought together by 

 the screw k. From the upper end of g' hangs a screw, which passes between 

 two projections on^, and has a mother-screw k. The screw k works against 

 the projections on g, and draws the ends of g"^ and g together. These press on 

 the rabbit's nose and under jaw and keep the teeth firmly locked over the 

 rod h. mm are screws for fixing the cords which confine the legs. They are 

 a remarkably convenient sort, consisting of an outer part with a horizontal 

 hole, and an inner ring with a stalk on which a milled screw plays. When the 

 milled head is at the top of the stalk, the inner ring and outer holes corre- 

 spond, and the cord can then be easily pushed through ; but when the milled 

 head is turned, the stalk and ring are drawn up and the cord nipped between 

 it and the outer part. The cords may either be fastened directly in the screw 

 or passed first through one of the holes in the edge of the board. The board 

 should be covered with a large pad of india-rubber stuffed with horse hair, and 

 there should be another round pillow to put under the animal's neck. 



which a fork of steel passes, and is secured by a screw. The 

 fork may then be fastened by a nut to an upright rod, as in 

 Czermak's holder (Fig. 127b). Cats and guinea-pigs may be fast- 

 ened by Czermak's holder. For guinea-pigs, a little padding 

 must be placed between g and g' in order to make them catch 

 the head. A simple bar and cord may also be used for rabbits, 

 cats, and guinea-pigs, as well as for dogs. 



Instniwents required. — The instruments which we generally 

 require for operations are — sponges, one pair of large scissors 



