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Bacterium coli (Escherich). L. and N.

I. Gelatin plate, eight days at 22°. X 60. Cultivated from pus. Deep colonies of abnormal form.

II. Gelatin plate, four days at 22o. Natural size.

III. Gelatin plate, one day at 22o. X 90. Superficial colony. Compare also Plate 14, VIII; Plate 16, VIII.

IV. Gelatin plate, four days at 22°. X 60. Superficial colony. Compare also Plate 16, ix; Plate 17, 1, 11.

V. Gelatin plate, four days at 22°. X 60. Deep colonies.

VI. Gelatin plate, ten days at 22°. X 90. Superficial colony.

VII. Gelatin plate, ten days at 22°. X 90. Superficial colony.

VIII. Microscopic preparation. Pure culture from agar plate. ' x 500.

IX. Different varieties of coli bacteria. X 1000. Variable sizes.

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I. Agar streak culture, seven days at 22o.
II. Gelatin stab culture, fourteen days at 22°

III. Gelatin plate, seven days at 22o. x 60. To the right deep, to the left superficial colonies.

IV. Potato culture, thirty days at 22o. Natural size.

V. Agar plate, seven days at 22o. X 60. To the right a superficial, to the left a deep colony.

VI. Microscopic preparation. Pure culture on agar, twenty-four hours old. X about 800.

Bacterium hæmorrhagicum (Kolb). L. and N.

(Morbus Werlhofii.) VII. Microscopic preparation. Pure culture from bouillon, three days old. (Copied after Kolb, A. G., Bd. vii, Plate II, Figs. 1 and 2.)

VIII. Smear preparation from the liver of a dog. (Copied after Kolb, l. c., Bd. vii, Plate ini, Fig. 8.)

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