DISEASES OF THE BONES 399 
until the whole of the front and sides became involved, 
“assuming the appearance shown in Fig. 156. 
In spite of the coronary enlargement the mare worked 
well, and remained free from lameness till June 8, 1903, on 
which day the limb became swollen up to the site of the 
Fic. 156.—A Case oF Buttress Foor. 
median operation. The appearance of the limb closely 
simulated an attack of lymphangitis. The mare was kept 
under observation till the 18th of the same month, during 
which time the swelling increased, as did also the lameness 
to a slight degree. During progression she brought the 
