DESCRIPTION OF PLATE III. 



FIG. i. Diplococcus meningitidis in film, from cerebro-spinal 

 fluid obtained by lumbar puncture in a case of cerebro- 

 spinal fever. 



FIG. 2. Gonorrhceal pus, showing numerous polynuclear 

 leucocytes, one of which contains gonococci; a part of 

 a squamous cell also shown. 



FIG. 3. Pneumobacillus in pus from a case of conjunctivitis. 

 FIG. 4. Pneumococci in sputum from a case of pneumonia. 



FIG. 5. Micro co ecus catarrhalis in sputum from a case of 

 bronchitis. 



FIG. 6. Staphylococci in old and degenerated pus. 



This plate is to illustrate the main morphological differences 

 between the chief pathogenic diplococci and organisms re- 

 sembling them. All the films were stained by Gram and 

 counterstained by carbol fuchsin. In Figs. I, 2, 3, and 5 the 

 organisms were coloured pink; in 4 and 6 they were violet. 

 The figures are all drawn to the same scale. 



