SETONS, ROWELS, PLUGS, OR ISSUES. 729 



Two methods are practised. 



In the first, a transverse fold is raised in the sldn of the 

 dewlap, which is divided with a stroke of the bistoury, leaving a 

 little aperature in the skin. By introducing the rounded ends of a 

 pair of curved scissors the subcutaneous connective tissue is broken 

 down, leaving a little space beneath the skin, into which the plug 

 is introduced. Swelling takes places very rapidly— in twenty-four 

 to forty-eight hours it is very considerable— and if the substance 

 employed is violent in its action, like hellebore, it must be with- 

 drawn, as otherwise considerable sloughing takes place. To facilitate 

 this object a thread or piece of string is usually attached to the 

 plug before it is inserted. 



In the second method, the irritant material is attached to, 

 or smeared on, a strip of broad linen tape which is passed in pre- 

 cisely the same manner as in the horse (see Dollar's "Operative 

 Technique," pp. 107—111). 



