CHAPTER VIII 
WOUNDS OF THE KERATOGENOUS MEMBRANE 
A. NAIL-BOUND—BIND OR TIGHT-NAILING, 
Definition.—By the term ‘nail-bound’ is indicated that 
accident occurring in the forge in which the nail of the 
shoe is driven too near the sensitive structures. Although 
involving no actual wound, it is important to consider the 
condition under the heading of this chapter, in order that 
it may be distinguished from the graver accident of a 
* prick.’ 
Causes.—Very largely the whole matter of causation turns 
on the correct fitting of the shoe. The points especially 
to be noticed in this connection are (1) the position of 
the nail-holes in the web of the shoe, (2) the ‘ pitch’ of 
the nail-holes. 
Regarding the position of the nails, it goes without say- 
ing that the first consideration when ‘holing’ the shoe 
should be to punch the holes opposite to sound horn. This 
remark applies especially to shelly and brittle feet, the type 
of feet in which tight-nailing most often occurs. The next 
consideration in this connection is that of punching the 
holes so that the nail emerges from the upper surface of 
the web at exactly its correct point of entrance on the bear- 
ing surface of the foot. This should be on the white line 
immediately where it joins the wall. From this position 
any marked deviation inwards (‘fine-nailing,’ as it is 
termed) is bound to give to the nail a direction dangerously 
near the sensitive structures. 
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