PLATE 2. 



Streptococcus lanceolatus. Gamaleia. (Diplococcus 

 pneumoniae A. Frankel.) (Pneumococcus.) 



I. Gelatin stab culture, ten days at 22°. 

 II. Agar streak culture, four days at 37°. 



III. Agar stab culture, four days at 37°. Stab canal. 



IV. Agar stab culture, four days at 37°. Surface 

 growth. 



V. Agar plate, three days at 37°. Natural size. 

 VI. Agar plate, three days at 37°. X 50. Superficial 

 colony. The darker colony lies near the surface. 



VII. Agar plate, three days at 37°. X 50. Deep col- 

 onies: 



VIII. Gelatin plate, eight days at 22°. The upper colony 

 is superficial; the lower ones, deep. 



IX. Smear preparation from pneumonic sputum. 

 X 1000. 



X. Pure culture from a three days' old agar plate. 

 X 1000. 



XI. Microscopic preparations: (a) Diplococci as single 

 pairs and in chains. Highly magnified, (b) Diplococci 

 surrounded by gelatinous capsules. 



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XI. 



