PLATE 28. 



Bacterium syncyaneum (Ehrenb.). Lehm. and Neum. 

 (Bac. cyanogenes Fliigge ; Blue Milk.) 



I-III. Potato cultures, from three to ten days at 22. 

 Many varieties of potato inoculated with the same culture. 

 The differences in colors may be still more numerous. 

 IV. Agar plate, three days at 22. Natural size. 

 V. Agar plate, three days at 22. X 60. To the right, 

 deep ; to the left, superficial colonies. 



VI. Gelatin plate, three days at 22. Natural size. 

 VII. Gelatin plate, eight days at 22. Natural size. 

 Appearance of colonies upon a white background. 



VIII. Gelatin plate, three days at 22. X 60. Above, 

 superficial ; below, deep colonies. 



