23° 



Experimentation upon Animals 



the skin picked up with forceps, a snip made through it, and the 

 points of. the scissors introduced for an inch or so and then separated. 



Fig. 70.— Latapie's animal holder for rabbits, guinea-pigs, and other small 

 animals. This form of holder is in general use at the Institute Pasteur in 

 Paris. 



By this manoeuver a subcutaneous pocket is formed, into which the 

 tissue is easily forced. The opening should not be large enough to 

 require subseauent stitching. 



Fig. 71. — Guinea-pig confined in the holder. 



, When tissue fragments or collodion capsules are to be introduced 

 into the abdominal cavity, the animal should be anesthetized and 



Fig. 72. — Mouse-holder. 



a formal laparotomy done, the wound being carefully stitched 

 together. 



