232 



BACTERIOLOGY. 



u seful . It is simply a metal plate attached to a stand by a 

 clamped ball-and-socket joint, so that it can be fixed in 



Fig. 43. 



Kitasato's mouse-holder. 



any position. It is provided with a spring-clip at one 

 end that holds the animal by the skin of the neck, and 



Fig. 44. 



Holder for larger animals. 



at the other end with another clamp that holds the tail 

 of the animal. This holder is shown in Fig. 44. For 



