756 



VOICE AND SPEECH 



[CH. LV. 



be slightly lowered until the larynx comes into view ; care should be taken, how- 

 ever, not to move the mirror upon the uvula, as it excites retching. The observa- 

 tion should not be prolonged, but should rather be repeated at short intervals. 



FIG. 556. The parts of the Laryngoscope. 



The structures seen will vary somewhat according to the condition of the parts 

 as to inspiration, expiration, phonation, etc. ; they are (fig. 558) first, and apparently 



FIG. 557. To show the position of the operator and patient when using the Laryngoscope. 



at the posterior part, the base of the tongue, immediately below which is the arcuate 

 outline of the epiglottis, with its cushion or tubercle. Then are seen in the central 



