ASPIRATION OF THE STOMACH OF HORSES 417 



spite everything, the end of the tube may persist in passing 

 into the larynx instead of into the oesophageal infundibulum. 

 The prevention of this annoying circumstance lies largely 

 in abiding by the recommendations laid down in step i. The 

 stiffness of the tube is also an important factor. If too 

 limber it drops too sharply after passing through the poste- 

 rior nare and thus glides over the superior surface of the 

 epiglottis into the glottis. The texture of the tube should 

 be sufficiently firm to prevent bending in the pharynx. 



