DESCRIPTION OF PLATE I. 



FIG. i. Diphtheria bacillus (long form) from a young 

 culture on blood-serum. Loffler's blue ; x 1000. 



FIG. 2. Diphtheria bacillus (short form) and Hoff- 

 mann's bacillus. From young cultures on blood- 

 serum. Loffler's blue ; x 1000. 



FIG. 3. Pneumococci in sputum from a case of pneu- 

 monia. Stained with dilute carbol fuchsin and 

 thoroughly washed ; x 1000. 



FIG. 4. Anthrax bacilli. The lower portion of the 

 field shows bamboo-like chains and spores, and is 

 taken from cultures. Methylene blue ; x 1000. 

 The portion showing spores is stained with carbol- 

 fuchsin, decolorised by brief immersion in methy- 

 lated spirit, and counterstained in methylene blue. 



FIG. 5. Pus showing streptococci. Stained by Gram's 

 method, counterstained with eosin ; x 1000. 



FIG. 6. Pus showing gonococci and staphylococci. 

 Stained by Gram's method and counterstained 

 with dilute carbol -fuchsin ; x 1000. 



