THE PRODUCTION OF THE VOICE. 



543 



between them is left a chink, narrow while a high note is being sung, wide 

 during a deep inspiration. On each side of the true vocal cords, and on a 

 higher level, are the pink false vocal cords. Still more externally than the 



Fig. 345. The parts of the Laryngoscope. 



false vocal cords is the aryteno-epiglottidean fold, in which are situated upon 

 each side three small elevations ; of these the most external is the cartilage of 

 Wrisberg, the intermediate is the cartilage of Santorini, while the summit of 

 the arytenoid cartilage is in front, and somewhat below the preceding, being 



Fig. 346. To show the position of the operator and patient when using the Laryngoscope. 



only seen during deep inspiration. The rings of the trachea, and even the 

 bifurcation of the trachea itself, if the patient be directed to draw a deep breath, 

 may be seen in the interval between the true vocal cords. 



