PLATE I. 



Fia. 1. Film of pus, containing staphylococci and streptococci. Stained 

 by Gram's method. X 1000 diameters. 



;,Fig. 2. Fraenkel's pneumococcus in sputum, from a, case of acute 

 pneumonia. Rd. Muir's method of capsule staining. 



X 1000 diameters. 



Fig. 3. Meningococcus in epidemic eerebro-spinal fever, from lumbar 

 puncture fluid, showing some involution forms. Irishman's 

 stain. k X 1000 diameters. 



Fig. 4. Film from a scraping of throat in Vincent's angina, showing 

 fusiform bacilli and spirochetes, X 1000 diameters. 



Fig. 5. Gonorrhoeal pus, showing gonococci (stained rcf" r s-;»i 

 cocci, Gram's method. 



