VE T ERIN A R Y DEN TA L SURGE R Y. 99 



tached to the fang. The crown of the molar was 

 perfectly normal. On making a section of the mass 

 it appeared to be composed of material resembling 

 crusta-petrosa. 



The drawing in Fig. 25 was made from a tooth, 

 taken from a horse, the property of Mr. William 

 Charles, of Bangor, Michigan. The history of the 

 case as given by Mr. Charles was as follows: 



"For two years previous to the operation (Sept. 

 5th, '86), the horse had gradually declined in flesh, 

 being unable to properly masticate his feed. After 

 a time a foul and disagreeable odor emanated from 

 the mouth, the gums on the right side of the lower 

 jaw becoming red with gradual enlargement over 

 the region of the third molar. As the disease pro- 

 gressed the difficulty in mastication increased, until 

 the coarse feed had to be cut very fine. The grain 

 consisted of corn, oats and wheat, which was ground 

 as fine as possible. All kinds of feed were swallowed 

 whole. By this mode of feeding the animal was kept 

 in such condition that he could be worked. 



On the above date I was requested to examine 

 the horse and, if advisable, to operate. On making 

 an examination of the mouth I found a large tumor 

 over the region of the third lower right molar. It 

 was of sufficient size to cause a bulging of the cheek 

 that was noticeable at a distance. The tumor was 

 partially denuded at its upper extremity. The third 



