x- t 



PLATE I. 



Fio. 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 cerebro-spinal fever, from lumbar 

 puncture fluid, showing some involution forms. Leishman's 

 stain. x 1000 diameters. 



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

 fusiform bacilli and spirochsetes. x 1000 diameters. 



FIG. 5. Gonorrhceal pus, showing gonococci (stained red) and staphylo- 

 cocci. Gram's method. x 1000 diameters. 







