DISEASES OF THE LATERAL CARTILAGES 377 
order to judge of their regularity. If we are satisfied with 
them, we then lightly mark them with the saw, with the 
hot iron, or with the knife, whichever instrument we may 
be intending to use. 
Unless the details are methodically carried out as here 
described, it is probable that more of the foot will be isolated 
than is necessary, and that as a consequence very little 
is left to which to nail the shoe. 
Fic. 149.—D1aAGRaM ILLUSTRATING THE PosITION OF THE GROOVES 
MADE IN THE Hoor in CoLoneL SmirH’s OPERATION FOR SIDE- 
BONES. 
1, 2, and 3, show the grooves in the wall in the order in which they are made ; 
4 shows the groove made at the junction of the sole with the wall. 
The incisions are then made with the saw or the knife, 
with the foot held in a convenient position by an assistant. 
That usually found most comfortable for the first incision is 
with the foot held forwards and placed on an assistant’s 
thigh in the position adopted for ‘clenching up’ when 
shoeing, while that for the rear incision is with the animal’s 
knee flexed, and the foot held well up to the elbow. In 
this, however, each operator will suit himself. 
Should the preliminary steps in making the incisions be 
performed with the iron, it will be easiest done with the 
foot on the ground. 
