Explanation of Plate 33. 



BACTERIUM VULGARE Lehm. and Neum. 

 (Proteus vulgaris Hauser.) 



I. Gelatin stick culture, twenty-four hours at 22. 

 II. Agar streak culture, thirty-six hours at 22. 



III. Agar plate, thirty-six hours at 22. Natural size. 



IV. Agar plate, four days at 22. x60. Above, 



superficial ; below, deep-seated culture. 

 V. Gelatin plate, thirty -six hours at 22. Natural 



size. 



VI. Gelatin plate, thirty-six hours at 22. x60. 

 Eight side, superficial; left side, deep-seated 

 colonies. The lower one, emerging on the sur- 

 face, is beginning to liquefy. 



VII. Gelatin plate, three days at 22. x60. Deep- 

 seated colony. Zoogloaa form, like bacterium 

 Zopfii. 



VIII. Microscopical preparation, x 800. Pure agar cul- 

 ture. Fuchsin stain. 

 IX. Bacteria with numerous flagella. X 1,000. 



33 



