358 CANKER. 
corrosive sublimate with three times its bulk of flour; then wet the probe ; 
dip the probe into the powder and afterward insert it into the sinus. 
Do this several times till you feel certain that every portion of the pipe 
is brought in contact with the caustic. 
The horse, subsequently, will become very dull; the foot will grow 
very painful: thus it will continue for two days. About the third day, 
a white, curd-like matter is discharged from the orifice. The lameness 
(lisappears, and the spirits are regained. 
It is against our inclination to publish such directions; but the author 
has knowledge of no gentler or more speedy measure. The better plan 
for the gentleman who is tender of his servants’ feelings, and infinitely 
the cheaper for the person who is regardful of his pocket, is to have 
every animal inspected by a qualified veterinary surgeon so soon as it 
displays acute lameness. Were such the practice, corn, prick of the foot, 
or wound of the coronet need not run on to quittor. That is an affec- 
tion which loudly pronounces man to utterly disregard the welfare of his 
most willing slave. It always originates in neglect. It always requires 
time for its development. It springs from that idle and silly maxim 
which, when a horse falls lame, treats the circumstance as though the 
honest animal were shamming, and teaches a hard-hearted proprietor to 
g, 
work the poor drudge sound again. 
CANKER. 
Thrush is a disease that causes a certain liquid to be secreted which 
has the property of decomposing the horn. Canker is a disease which 
not only is attended with a liquid having a like property, but the last- 
named affection also causes fungoid horn to be secreted. Canker, there- 
fore, appears to be an aggravation of thrush; and anybody who has 
been much among the animals of the poorer classes may have observed 
these diseases lapse into each other: thrush will, through neglect, become 
canker, 
Thrush appears to be the commencement of the disorganization of the 
food. Canker is the total perversion of the secreting powers belonging 
to the same organ. In thrush, a foul humor having a corruptive prop- 
erty is poured forth. In canker, something is superadded to this. The 
horn itself is sent forth in large quantity as a soft, unhealthy material, 
totally divested of elasticity and devoid of all healthy resistance. 
Auy animal, being exposed to the exciting cause, may exhibit thrush; 
but, before canker seems capable of being produced, poor living must 
have undermined the constitution. Old horses—pensioners, as they are 
humanely termed—when turned out to grass, frequently have canker, 
