274 



BACTERIOLOGY 



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

 white punctate colonies form on the plate and display a 



Jjt 



- Superficial elevation 



-Needle-track 



film f 



Needle-track 



Pig. 95. — Thrust-Culture in Gelatine 

 OF Friedlander's Pnbumobacillus 

 (' Nail-Culture '). 



Fig. 96.— Thrust-Cl-ltuhe in Gelatine 

 OE MiCKOcoccus Tetragenus. (After 

 Mac6.) 



shining, porcelain-like appearance on the surface of the 

 medium. Isolated sharply-defined colonies appear along 



