170 BIOLOGY AND TECHNIQUE 



infection no less than does the virulence of the microorganism or the 

 size of the dose. 



Inoculations are made with some form of hypodermic needle fitted to 



Fig. 49. — Intraperitoneal Inoculation op Rabbit. 



Fig. 50. — Intravenous Inoculation of Rabbit. 



a syringe. The most convenient syringes are the all-glass Luer or the 

 Debove syringes, which, however, are expensive. Any form of steriliz- 

 able syruige may be used. In making inoculations the hair of the 



