DISEASES FROM FAULTY CONFORMATION 201 
point. With this shoe we shall at the same time supply a 
certain amount of pressure to the frog, and aid in the 
healthy development of the part indirectly involved in the 
disease. 
The same pressure may also be given to the frog, and 
protection afforded the sole, by the use of a leather sole, or 
rubber pad on leather, as described when dealing with con- 
tracted feet. 
A further method of relieving pressure on this portion of 
the wall, without removing the wall itself (a practice which 
should never be advised) is to make certain alterations in 
the web of the shoe. This may be done in one of two 
ways. 
Fie. 102.—THREE-QUARTER Fic. 103.—THREE-QUARTER 
: SHOE. Bar SHOE. 
In the first, that portion of the bearing surface of the 
heel of the shoe is ‘ dropped’ about } inch from the plane of 
the remainder, so that the shoe at this position does not 
come into contact with the foot at all (see Fig. 104). 
In the second case the shoe is what is termed ‘ set’ at 
the heel. Here it is the plane of the wearing surface of the 
shoe that is altered. The hinder portion of the required 
heel is thinned so that its lower surface does not come into 
contact with the ground. By this means the wall is freed 
from concussion and pressure. At the same time the 
upper surface of the shoe is in contact with the wall of the 
foot (see Fig. 105). 
This ‘setting’ of the shoe is preferable to the method . 
first described. It affords a greater protection to the foot, 
