228 



Experimentation upon Animals 



shown in the illustration. Those of Meyer and Roux resemble 

 ordinary hypodermic syringes; that of Koch is supposed to possess 



Fig. 68. — Altmann syringes for |)acteriologic and hematologic work. These are 

 capable o£ sterilization without injury and are thoroughly satisfactory. 



Fig. 69. — Method of making an intravenous injection into a rabbit. Observe 

 that the needle enters the posterior vein from the hairy surface. 



the decided advantage of not having a piston to come into contact 

 with the fluid to be injected. This is, however, really disadvanta- 

 geous, inasmuch as the cushion of compressed air that drives out the 



