274 



BACTERIOLOGY 



linski, in dental abscesses. Gelatine is not liquefied, and 

 white punctate colonies form on the plate and display a 



Superficial elevation 



-Needle-track 



Needle-track 



FIG. 95. THRUST-CULTURE IN GELATINE 

 OP FRIEDLANDER'S PNEUMOBACILLUS 

 (' NAIL-CULTURE '). 



FIG. 96. THRUST-CULTURE IN* GELATINE 

 >K MICROCOCCUS TETRAGEXUS. (After 

 Mace.) 



shining, porcelain-like appearance on the surface of the 

 medium. Isolated sharply-defined colonies appear along 



