640 



Journal of Agnadture. 



[8 Oct., 1907. 



which comprise {a) an iron for burning notches on each side of the crack 

 into which the hooks of the clips are introduced, {b) a steel clip made of 

 narrow bands of steel hooked at each end, and {c) a pair of forceps for 

 the purpose of fixing the hooks in the notches, and compressing the clip. 

 A more ready-to-hand method of clasping may be perfoTmed as follows : — 

 Cut a short notch with the drawing knife lengthways of the crack and on 

 each side of it. Then drive a horseshoe nail in at one notch, sO' that it shall 

 pass through the crack, and make its exit at the notch on the other side 

 of the crack. Pinch off the head of the nail and clinch both ends tightly 

 over the crack. Care must be taken that the sensitive structures are not 

 touched when driving the nail. Three or four clips or clasps may be put 

 \n the length of the crack if necessary. In cases where the crack does 

 not extend the whode way down from the coronet to the ground surface 

 arrest of movement may be accomplished by isolating the crack. This i? 

 done by cutting or burning grooves on each side of the crack, commencing 



Fig. 107. Partial san<l crack isolated 

 by V-shaped groove cut in horn. (After 

 Haves.) 



tig. 108. Hoof showing sand crack 

 O'l inside quarter clipped as described 

 in text. (After Axe.) 



at the coronet about half-an-inch on each side of the crack, and converg- 

 ing to meet at a point below the inferior extremity of it — a V-shaped 

 groove, in fact, divided by the crack. The groove must be deep enough 

 to reach the soft white layer of horn, .so that it will "give," and, there- 

 fore, the horn it encloses be unaffected by concussion or body-weight j^res- 

 sure. The crack within the V may be cla.sped as described. (See 

 Fig. 108.) 



When the horn has commenced to groyy unsplit from the coronet, about 

 a year will elapse before it reaches the ground surface of the wall solid. 



" The shoeing of a foot affected with sand crack requires some special 

 attention. The shoe, in these cases, should be light, and in the case of a 

 toe crack should have two clips, one on either side of the crack, but a 

 little distance from it. The shoe must have a good solid bearing on the 

 wall of the foot, but under the crack the horn should be cut out in a semi- 

 circular fashion in order to remove all weight-bearine from this part " — 

 {Wilkie.) ^ ^ ' 



