240 



BACTERIOLOGY. 



of the tail in mice a simple apparatus consists of a 

 piece of board about 7 x 10 cm. and 2 cm. thick, 

 upon which is tacked a hollow truncated cone of wire 

 gauze, about 6 cm. long and about 1.5 cm. in diameter 

 at one end and 2 cm. at its other end. This is tacked 



FIG. 44. 



The Voges holder for guinea-pigs. 



upon the board in such a position that its long axis is 

 in the long axis of the board, being equidistant from its 

 sides. Its small end is placed at the edge of the board. 

 The mouse is taken up by the tail by means of a pair 



