Explanation of Plate 12. 



BACTERIUM PNEUMONIA. Friedlander. 

 (Friedlander' s pneumonia bacillus.) 



I. Agar streak culture, four days at 22. 

 II. Gelatin stick culture, ten days at 22. 



III. Agar stick culture, four days at 22. Puncture 



canal. 



IV. Agar stick culture, four days at 22. Surface. 

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



VI. Agar plate, two days at 22. x60. The brown, 



whetstone-shaped colony is deep seated. 

 VII. Gelatin plate, three days at 22. x50. Above, 



superficial colony ; below, deep-seated one. 

 VIII. Agar plate, four days at 22. Natural size. The 



delicate gray colonies and the smallest ones are 



deep seated. One colony has been colored too 



yellow. 

 IX. Microscopical preparation. Pure culture ( x 800) 



from an agar plate. Stained with fuchsin. 

 X. Microscopical preparation. Sinear preparation 



from sputum, x 800. Fuchsin stain. 

 XI. Potato culture, six days. 



