18 ON PLATE-CASTING. 



parts look perfectly healthy, and cause the patient 

 no inconvenience. 



This case is useful to show the amount of 

 irritation which the bone and lining membrane 

 of the antrum suffered, without exciting more 

 inflammation than is necessary for the healing 

 process. The communication through the nose 

 was at no time obstructed, neither was there any 

 collection of secretion in the cavity after the fis- 

 tulous opening made in the bone had closed, so 

 far as we have had an opportunity of observing. 

 I have always used the trephine instead of the 

 usual perforating instruments, with the advan- 

 tages of exciting less inflammation and giving 

 more space for washing out irritating matter from 

 deep fossae, which are often present in the floor 

 of the antrum, prior to curative treatment by 

 injection. 



In a similar case in which I operated some 

 years ago, I observe that the front and side teeth 

 have separated very much, owing to the patient 

 having neglected to wear a mechanical con- 

 trivance which was supplied to keep them in situ, 

 and assist mastication. 



Mr. J. N. Statham then read a paper ou " Flate-casiing ^ 



After alluding to the possibility of forming 

 plates by the electric battery, by packing crystal- 

 line or adhesive metal, or by layers of foil and 

 solder, the author said : — " To scientific and prac- 



