368 



EXPERIMENTAL INOCULATION OF ANIMALS 



to the left hand of an assistant who secures the animal's 

 tail between the fingers grasping the handle of the for- 

 ceps. (See Fig. 191.) 



(b) Mouse. An assistant grasps the loose skin 

 between the ears as far forwards as possible between 

 the fore-finger and thumb of the left hand. He now 



FIG. 191. Intragastric inoculation of rat. 



grasps the tail with the right hand, draws the mouse 

 straight and passes the tail between the fourth and little 

 fingers of the left hand and secures it there. 



2. The assistant takes a closed pair of thin-bladed 

 forceps in his right hand, passes the ends into the 

 animal's mouth, then allows the blades to separate. 

 This opens the animal's jaw and serves as a gag. 



