350 CORNS. 
fixed during every action of the animal—not so, however, the coffin-bone, 
which is in continuous motion. The result, of course, is, the imposed 
burden forces the wings of the coffin-bone downward. The horny sole 
DIAGRAM DIAGRAM 
Showing the position of the hindermost Illustrating the relative positions of the 
part of the coffin-bone when in a pas- wings of the coffin-bone, and the thick, 
sive state; also portraying the shoe in concave, horny sole of the contracted 
the fleshy or flat foot. foot when not in motion. 
will not yield, and the fleshy sole is therefore bruised between the wings 
of the coffin-bone and the horn bottom of the hoof; a corn is thereby 
established. 
Corns in a horse do not answer to those excrescences found upon the 
feet of man; being bruises, they consist of effusion in every instance. 
The effusion may either be of blood or of serum; blood constitutes the 
old and the new corn, serum gives rise to the sappy corn. The suppu- 
rative corn is an after-consequence of either of those just named; when 
the effusion has been so large as to defy absorption, a new action is 
started up—pus is secreted, and a suppurative corn is then created. 
An old corn is the least serious, especially when it is easily cut away; 
it appears as a black mark upon the surface of the horny sole, and is 
little thought of when it can be speedily removed by the knife, because 
this shows the horse had a corn, but at present is free from such an 
annoyance. When, however, a superficial corn cannot be scooped out 
THE SITUATION AND ASPECT THE DEEPLY-SEATED AND SMALL, 
OF AN OLD CORN UPON A SCARLET SPOT WHICH DECLARES 
LARGE, FLAT FOOT. THE PRESENOE OF A NEW CORN. 
with the drawing-knife, but becomes brighter and brighter as more and 
more horn is cut away, till it assumes the scarlet aspect of a new corn, 
