190 



BACTERIOLOGY 



develop, which adhere firmly to the mass, and on potato 

 there grows a dh'ty whitish-grey layer containing many 

 involution forms. 



Fuunel-sliaped area of 

 liquefaction 



- Needle-track 



Pig. 72.— Theust-Cuitube in Gelatine of the Bacillus jiegateeium. 



Besides the above, the Bacillus prodigiosus, Bacillus siib- 

 tilis, Bacillus amylohacter , and Bacillus butyricus are met 



