370 



BACTERIOLOGY. 



On potato its growth is very like that of the cholera 

 spirillum, viz., it appears at 37 C. as a dry, white 

 patch that lies quite flat upon the surface and can often 

 only be seen when the tube is held to the light in a 

 special way. 



FIG. 76. 



a bed 



Stab culture of Miller's spirillum in gelatin, at 18 to 20 C. 



a. After twenty-four hours. 6. After forty-eight hours, c. After seventy-two 



hours, d. After ninety-six hours. 



Its growth in bouillon is not characteristic. It does 

 not form a pellicle. 



It causes liquefaction of both coagulated blood-serum 

 and egg albumin. 



It does not produce indol. 



It does not cause fermentation of glucose. 



It is non-motile. 



