PLATE 50. 



Vibrio cholerae. (Koch.) Buchner. (Comma Bacillus.) 



I. Gelatin plate, five days at 22°. X 60. Abnormal 

 form of superficial colony. 



II. Gelatin plate, five days at 22°. X 90. Abnormal 

 form of superficial colony. 



III. Gelatin plate, five days at 22°. X 60. Deeply 

 sunken superficial colony with a strongly reflecting zone of 

 liquefaction. 



IV. Gelatin plate, six days at 22°. X 60. Abnormal 

 superficial colony, with dense nucleus, evenly sunken in and 

 with a zone of liquefaction. 



V. Gelatin plate, six days at 22°. X 60. Abnormal 

 deep colony, without halo, dark, with radiating striations, 

 from the same plate as iv. 



VI. Potato culture, two days at 22°. Natural size. 

 Soaked in soda solution before inoculation. 



VII. Potato culture, five days at 22°. Inoculated upon 

 ordinary potato. 



