ON CAPPING THE EXPOSED PULP. 137 



at various angles, made to adhere for the occasion to 

 the convex surface of the cap by the mastic solution. 

 Owing to want of time, I have only recorded 

 forty-eight cases of this operation. Of these, forty- 

 two have been hitherto successful ; but as some of 

 these are only lately performed, this may not be a 

 proper proportion. Of nine cases recorded in 1853, 

 seven are at the present time going on well. Of 

 the two failures, one occurred two, the other twelve 

 months after the operation, both in the absence of 

 the patients from town, and without any examina- 

 tion being made after extraction. In both I had 

 used arsenious acid to lessen sensibility, but in 

 neither was the pulp destroyed at the time of the 

 operation. In 1854, I have recorded ten cases; of 

 these seven are successful and three failures. These 

 three all occurred in two or three months after 

 operating, and from the effects of severe colds. In 

 one which I had the opportunity of seeing, the 

 neighbouring parts were highly inflamed, and the 

 pulp was in a state of suppuration. Arsenic had 

 been used in one case. In 1855 I have seven 

 cases recorded, all of which have succeeded. In 

 1856 three only, two quite successful; in the other 

 the filling came out in about two months, and 

 was replaced without a cap. The tooth now 

 appears dead, though the surrounding gum is 

 healthy. This year I have recorded nineteen cases, 

 one of which has been since lost. Arsenic had liere 

 been used. Another presents one or two interest- 



