PLATE 49.

Vibrio cholera. (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 22°. × 60. To the left superficial, to the right deep colonies.

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

IV. Gelatin plate, three days at 22°. colonies.

X 60. Deep

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

VI. Gelatin plate, four days at 22°. × 60. Deep colony.

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

VIII. Gelatin plate, five days at 22°. 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.

PLATE 50.

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

I. Gelatin plate, five days at 22°. × 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°. × 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.