SARCINA VENTRICULI 



247 



colours, and does not discharge the stain under Gram's 

 process. 



'lis Colony on the gelatine 



* f— plate 



Tetrad form of the sarcina 

 grown on gelatine 



Superficial prominence 



Needle-track 



Fig. 91.— Thrust-Cdxture in GtBLATike of Sarcixa YEN'micuLi, four days old. 



The growth of this microbe does not affect albuminoid 

 bodies, but it has the property, on the other hand, of pre- 

 cipitating caseine and changing milk sugar into lactic acid. 



