THE PREPARATION OF CERTAIN SPECIAL MEDIA 45 



Group E. Media either necessary for or especially desir- 

 able for the cultivation or differentiation of certain pathogenic 

 bacteria. 



c,_jr- ^^_Acid agar (in small tubes). 



^ Acid glycerin agar (in small tubes). ' __ — ^^ 



. — ^___Acid glycerin bouillon (in small tubes). ' 

 ^ Blood serum (dog) solidified at 70° to 75° C. (ground-glass- 

 capped tubes). 

 Loefiier's blood serum (usually small tubes). — ■ ^0 

 Egg medium (Dorset). 



V' 



z 



