EXAMINATION OF PUS AND EXUDATES 99 
If gonorrheal discharge, stain the cover-glass preparations 
with an alcoholic solution of eosin and alkaline methylene 
blue, or with carbol fuchsin. Note the appearance of the 
cocci both within and outside of the pus cells. 
If from supposed tuberculosis, stain for that organism. 
_ If from diphtheria, stain for that organism and note the 
morphology of the bacteria. , 
_ lf from the pus of an abscess, stain for pyogenic bacteria. 
152. Making cover-glass preparations from pus. Spread as 
thin a film of the pus as possible on the cover glass. This can 
be readily done by drawing the edge of a square cover glass 
over the surface of another cover glass on which a bit of the 
pus has been placed. See method for making cover-glass 
preparations from blood (§ 110). 
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