CHAPTER VIII 



WOUNDS OF THE KERATOGENOUS MEMBRANE 



A. X AIL-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 

 011 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 

 romark 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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