MILLER'S SPIRILLUM. 



405 



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. 83. 



a bed 



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



a. After twenty-four hours. &. 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. 



In milk containing blue litmus tincture it causes 

 almost complete decolorization in from three to four 



18* 



