THE PHARYNX. 65 



passing a bougie, stomach-pump tube, or probang, care 

 must be taken to apply it firmly to the posterior wall of 

 the pharynx to avoid entering the trachea. In making 

 an examination of the pharynx for the detection and re- 

 moval of foreign bodies, it will be noticed that far more 

 of its cavity can be reached with the finger than might 

 be supposed, and instruments must be used very care- 

 fully and sparingly in searching for them ; moreover, it 

 must be remembered that the walls of the pharynx are 

 in close contact when not transmitting food. 



