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

I. Gelatin plate, thirty-six hours at 22° X 60. Deep and superficial colonies.

II. Gelatin plate, forty-eight hours at 22o. X 60. To the left superficial, to the right deep colonies.

III. Gelatin plate, three days at 22o. x 60. Superficial colonies with zone of liquefaction.

IV. Gelatin plate, three days at 22° X 60. Deep colonies.

V. Gelatin plate, four days at 22o. X 60. Superficial colony with zone of liquefaction.

VI. Gelatin plate, four days at 22o. X 60. Deep colony.

VII. Gelatin plate, five days at 22o. x 60. Deep colony from a culture of cholera from Hanover.

VIII. Gelatin plate, five days at 22o. X 60. Superficial colony. Complete liquefaction has already taken place.

IX. Gelatin plate, eight days at 22° X 60. Superficial colony with zone of liquefaction.

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

I. Gelatin plate, five days at 22o. 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 22o. Natural size. Soaked in soda solution before inoculation.

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

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