METHODS OF EXAMINATION. 223 



is to inject some of the material containing the suspected 

 cocci into a rabbit. If the pneumococcus be present the 

 animal will die, usually within forty-eight hours, with 

 numerous capsulated pneumococci in its heart blood. 

 With the latter inoculate tubes of the above media and 

 observe the growth, (b] Friedlander* s pneumobacillus can 

 be readily isolated either by ordinary gelatine plates or by 

 successive strokes on agar media. 



