614 
C. B. ADAMS. 
to be in line with and reach the wall which was strongest. 
Two heel-corks were then turned up about one-third of an 
inch high, and two more the same height, one on each side, 
set back from the toe about two inches ; when the shoe was 
applied he still walked lame on it, but after poulticing it for 
about three weeks every night with oil meal and five per cent, 
solution of carbolic acid, the hoof began to start growing, the 
sore spots to become less tender, and he was able to perform 
daily errands and slow, light work. 
As the department buildings are near the marshy banks of 
Mystic River, he was allowed to stand in an open pen of 
fresh peat bog every day for an hour or two when not in 
poultices. The hoof was reduced every time he was shod, 
the wall grew down with perfect regularity until at the con¬ 
clusion of eight months he was returned to his old place on 
the engine as sound as ever. Twelve months after my treat¬ 
ment commenced there was no trace of the disease excepting 
a hollow place or dent in the toe, showing where the point of 
the coffin-bone had crumbled away from necrosis. 
LYSOL AS A DISINFECTANT.* 
By Dr. C. B. Adams. 
The question may be asked : What is the difference be¬ 
tween a disinfectant and an antiseptic ? Therefore a discrim¬ 
ination is necessary before other facts are introduced. 
An antiseptic is an agent which, by contact with a germ, 
retards, but does not destroy, its powers of reproduction and 
growth. A disinfectant is an agent which, when brought in 
contact with a germ, utterly destroys it. 
Many of the agents heretofore classed as disinfectants are 
mere antiseptics. For example, corrosive sublimate. Experi¬ 
ments have established the fact that it does not destroy the 
germ, but enters into a chemical union with the protoplasm 
* Paper read before the Iowa Veterinary Medical Society. This paper re¬ 
prints work done in connection with a graduating thesis, under direction of Dr. 
W. B. Niles, at Iowa Agricultural College, Veterinary Department. 
