PHONATION 555 



not require voice, while the other two do. As lingual frictional may be 

 classified such sounds as s, th, sh, ch, z and j, the production of the last 

 two necessitating phonation. The vibrative r is produced entirely 

 with the tongue, while h finds its origin at the pharyngeal entrance. 

 In the latter case the mouth-parts assume the position ordinarily re- 

 quired to utter the vowel following the h, as in hear or house. 



