DESCRIPTION OF PLATE VIII. 

 Bacillus diphtherias and Bacillus typhosus. 



FIG. 1. Cover-glass preparation from a pure-cultivation of Bacillus diph- 



therire on blood serum ; obtained from the throat in a typical case of 



diphtheria. Stained with gentian- violet, x 1200. 

 FIG. 2. Cover-glass preparation from a pure-cultivation of Bacillus typhosus 



on nutrient-agar ; from the spleen in a case of typhoid fever Stained 



with gentian-violet, x 1200. 



