FIG. 73. B. DIPHTHERIA. 



Cover Glass Preparation, Serum Culture, 72 hours' growth 

 (37 C.), Roux's Stain, ^ apochromat, Projection ocular 6. 

 x 1000. 



FIG. 74. B. DIPHTHERIA. 



Cover Glass Preparation, Gelatine Culture, 72 hours' growth 

 at 21 C., Roux's Stain, ^ apochromat, Projection ocular 6. 

 x 1000. 



