Explanation of Plate 52. 



VIBRIO CHOLERA. (Koch) Buchner. 

 (Comma bacillus.) 



I. Gelatin plate, five days at 22. x60. Abnormal 



shape of a superficial colony. 



II. Gelatin plate, five days at 22. x90. Abnormal 

 shape of a superficial colony. 



III. Gelatin plate, five days at 22. x60. Deeply 



sunken, superficial colony with strongly reflect- 

 ing zone of liquefaction. 



IV. Gelatin plate, six days at 22. x60. Superficial, 



abnormal colony with compact nucleus. Shallow 

 sinking in, with zone of liquefaction. 

 V. Gelatin plate, six days at 22. x60. Deep, ab- 

 normal colony, dark, with radiating stripes, 

 from the same plate as IV. 



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

 Soaked in a solution of soda before inoculation. 

 VII. Potato culture, five days at 22. Upon ordinary 

 potato. 



