Plate IV. 



XIX. XX. 



Bacillus of Diphtheria Blood- Serum. Bacillus of Bubonic Plague in human 



Agar culture u Cladius stain" X 1.000. blood X 1.000. 



XXI. 



Fraenkels Diplococcus of pneumonia. 

 Agar culture Fuchsin X 1.000. 



XXIII. 



Schiitz's Streptococcus of Strangles in 

 pus from abscess Cladius stain X 1.000. 



J 

 XXII. 



Staphylococcus pyogenes aureus. Agar 

 culture "Cladius stain" X 1.000. 



s 



^ 



>>"> 



XXIV. 



Gonococci, in urethral discharge stained 

 by Knacks Method X 1.000. 



Bowhill, photo. Berlin 1898. 



Collotype by C. G. Roder, Leipzig. 



