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PLATE 14. Bacterium acidi lactici. Hüppe. (Lactic Acid Bacillus.)

I. Gelatin stab culture, five days at 22o. The stab canal in nature is somewhat whiter.

II. Agar streak culture, five days at 22°.
III. Agar stab culture, three days at 22°. Stab canal.

IV. Agar stab culture, three days at 22°. Surface growth.

V. Agar plate, three days at 22o. Natural size.

VI. Agar plate, three days at 22o. X 50. Upper colony superficial, lower colonies deep. Compare also Plate 18, VII.

VII. Gelatin plate, two days at 22o. Natural size. VIII. Gelatin plate, two days at 22o. X 50. Upper colony superficial, lower colonies deep. The superficial colonies may vary very much. Compare also Plate 16, VIII, IX; Plate 17, 1, II; Plate 19, IV, VII.

IX. Microscopic preparation. Pure culture from an agar colony. X 800.

X. Potato culture, six days at 22o. The air-bubbles on the surface often cover it completely.

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Bacterium pneumoniæ. Friedländer.

Pneumonia Bacillus.)

(Friedländer's

I. Agar streak culture, four days at 22o.
II. Gelatin stab culture, ten days at 22°.
III. Agar stab culture, four days at 22. Stab canal.
IV. Agar stab culture, four days at 22°. Surface growth.

V. Gelatin plate, three days at 22o. Natural size.

VI. Agar plate, two days at 22° X 60. The brown whetstone-shaped colony is deep.

VII. Gelatin plate, three days at 22°. X 50. Upper, superficial; lower, deep colony.

VIII. Agar plate, four days at 22° Natural size. The delicate gray colonies are deep; also the smallest colonies. One colony in the reproduction has turned out yellowish.

IX. Microscopic preparation. Pure culture from an agar plate. X 800. Stained with fuchsin.

X. Microscopic preparation. Smear preparation from sputum. X 800. Stained with fuchsin.

XI. Potato culture, six days.

PLATE 16. Bacterium typhi. Eberth. Gaffky. (Typhoid Bacillus.)

I. Agar stab culture, three days at 22°. Stab canal.

II. Agar stab culture, three days at 22o. Surface growth.

III. Gelatin stab culture, eight days at 22°. Stab canal.

IV. Gelatin stab culture, eight days at 22°. Surface growth.

V. Agar streak culture, four days at 22°. Compare also Plate 18, III.

VI. Gelatin streak culture, three days at 22o. Compare also Plate 18, 11.

VII. Gelatin plate, thirty-six hours at 22°. Deep colony. Compare also Plate 14, viii; Plate 19, v.

VIII. Gelatin plate, thirty-six hours at 22°. Superficial colony. Compare also Plate 14, vir; Plate 19, JII.

IX. Gelatin plate, four days at 22°. Superficial colony. Compare also Plate 19, IV, VII. .

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