350 



OPERATIONS ON THE DIGESTIVE APPARATUS. 



Fia. 356.— Gowing'B Forceps, Modified by Bouley. 



out on one side, an assistant inserts the forceps into the mouth, 

 adjusting it to the tooth to be extracted, and notifies the op- 

 erator of the moment when he can close the jaws of the instru- 

 ment together, which is done ia various ways according to the 

 kind of instrument ia use. When the tooth is properly seized 

 and firmly held by the forceps, the operator, using all his force, 

 carefully and slowly oscillates the iastrument from left to right, 

 and from right to left, in order to produce the gradual dislocation 

 of the organ, and when it is loosened from its attachments it is 

 drawn vertically out of its cavity by a final movement of evulsion. 

 There are instruments possessing a lever attachment close to the 



