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MANUAL OF MODERN FARRIERY. 
any appearance of inflammation, bleeding at the toe and 
opening medicines must be resorted to. 
CORNS 
Cause. —This disease has acquired a name which but ill 
expresses its nature. It bears but little affinity to corns 
of the human foot; although, like them, they are the effects 
of pressure. Instead of being hard as in the human subject, 
they are thin and very weak, and caused by pressure on the 
sole in the angle between the bars, as represented, plate 6, 
fig. 12, c c. The horn becomes more spongy and softer 
than at other parts, and it is so sensitive, that upon the 
slightest pressure the horse indicates that he feels pain. 
When the foot becomes contracted, that portion of the sole 
intervening between the external crust which is wiring in 
and the bars which oppose that contraction are squeezed 
very severely, which induces inflammation ; and hence it is 
that feet which are contracted are almost certain to be 
afflicted with corns. The effects of this pressure induce a 
small quantity of extravasated blood, and the horn being 
secreted in less quantity and of a more spongy texture, 
it has the tendency to enclose within it this extravasated 
blood. 
Nothing is more injurious than to allow a shoe to remain 
too long on, as it is sure to become embedded in the heel 
of the foot; consequently the crust grows down on the 
outside of it, and the bearing is thus thrown on the angular 
portion of the sole. Continued pressure on the sole is 
certain to induce inflammation and corns. The shoe being 
long on, wears and gets loosened at the heels, which admits 
of gravel between it and the crust, and having accumulated 
in the angle it naturally insinuates itself into the heel, and 
produces a sore. 
