86 FISTULA AND POLL-EVIL 
or gauze soaked in mercuric chlorid solution 
and bound down with the withers bandage. At 
the end of forty-eight hours we give the whole 
cavity a good cleaning under strict aseptic pre- 
cautions, removing the blood clots attached to 
the tissue completely. The cavity is now 
sprinkled with iodoform and then filled up with 
Fic. 10.—Tue DrainaceE Tune Arter THE Wounnd Tas BEEN 
Suturep, ATYPICAL FISTULA. 
a mixture consisting of iodoform five per cent 
and boric acid ninety-five per cent and the 
withers protected again with clean cotton and 
the bandage. 
In cases where the wound has not been soiled 
during the operation a daily renewal of the 
antiseptic powder after wiping out the old will 
