116 PRIVATE PRESCRIPTIONS 
and sufficiently deep to reach the bottom. When this is 
done treat the same as poll evil. _In case the bones of the 
spine are affected remove all loose pieces wi'h forceps and 
keep on with treatment 
Caries. 
This is simply an ulceration of the bone. 
Cause—W ounds of any character affecting the bones are 
liable to be followed by it. | 
HOW TO KNOW IT. 
We know it by the odor emitted, which is the same as 
that of decayed teeth There is always cons‘derable swell- 
ing and the bone feels rough to the finger. 
WHAT TO Do. 
Make an opening with a view to drainage, allowing a 
free escape of pus, scrape diseased surface of bone well 
with a dull instrument and use this: 
PRESCRIPTION. 
Acid, Hydrochloric. . . .. .°. 4 diana 
Water,q. sad...) 2...) 2 eee 
Mix and dress parts twice a day with it until bone heals, 
then-treat as a simple wound. 
Necrosis. 
By Necrosis is meast the death of bone. 
Cause—It is caused by caries and is a result of it. 
HOW TO KNOW IT. 
We find a fistula discharging offensive pus and pieces of 
dead bone, the discharge excoriating the surface over | 
which it passes. . 
