FIG. 57. B. TY^HOSUS. 



Agglutination by Serum from Typhoid Patient, unstained , 

 apochromat, Projection ocular 6. x 400. 



FIG. 58. B. COLI COMMUNIS. 



Cover Glass Preparation, Agar Culture, 48 hours' growth, 

 " Bacillary " form, Carbol-Fuchsine, ^ apochromat, Projec- 

 tion ocular 6. x 1000. 



