PLATE 14. Bacterium acidi lactici. Hüppe. (Lactic Acid Bacillus.) I. Gelatin stab culture, five days at 22°. 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 22°. Natural size. VI. Agar plate, three days at 22°. × 50. Upper colony superficial, lower colonies deep. Compare also Plate 18, VII. VII. Gelatin plate, two days at 22°. Natural size. VIII. Gelatin plate, two days at 22°. × 50. Upper colony superficial, lower colonies deep. The superficial colonies may vary very much. Compare also Plate 16, VIII, IX; Plate 17, I, II; Plate 19, IV, VII. IX. Microscopic preparation. Pure culture from an agar colony. X 800. X. Potato culture, six days at 22°. The air-bubbles on the surface often cover it completely. PLATE 15. Bacterium pneumoniæ. Friedländer. (Friedländer's Stab canal. Surface growth. Natural size. I. Agar streak culture, four days at 22°. II. Gelatin stab culture, ten days at 22°. III. Agar stab culture, four days at 22°. IV. Agar stab culture, four days at 22°. V. Gelatin plate, three days at 22°. VI. Agar plate, two days at 22°. × 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 22°. 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 22°. Compare also Plate 18, II. 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, VIII; Plate 19, III. IX. Gelatin plate, four days at 22°. Compare also Plate 19, IV, VII. Superficial colony. |