208 BACTERIOLOGY. 



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

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



FIG. 42. 



Kitasato's mouse holder. 

 FIG. 43. 



Holder for larger animals. 



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

 at the other end with another clamp that holds the tail 

 of the animal. This holder is shown in Fig. 42. 



