The Throat and the Voice 285 



fortune is the purity and compass of their tones, are carer 

 f ul not to impair these fine qualities by the habitual use of 

 strong drink. 



Tobacco often produces a disease well known to physi- 

 cians as "the smoker's sore throat." It may also cause 

 inflammation of the larynx and thus may entail disorders 

 of the vocal cords, involving rough voice and harsh tones. 

 For this reason vocalists should not attempt to use the 

 voice in a room full of tobacco smoke. 



ADDITIONAL EXPERIMENTS 



Experiment 144. To illustrate the importance of the resonating 

 cavity of the nose in articulation. Pinch the nostrils and try to 

 pronounce slowly the words "Lincoln," "something," or any other 

 words which require the sound of m, In, or ng. 



Experiment 145. To illustrate the passage of air through the 

 glottis. Take two strips of India rubber and stretch them over the 

 open end of a boy's " bean blower," or any kind of a tube. Tie them 

 tightly with thread, so that a chink will be left between 

 them, as shown in Fig. 155. 



Force the air through such a tube by blowing hard, 

 and if the strips are not too far apart, a sound will be 

 produced. The sound will vary in character, just as the 

 bands are made tight or loose. 



NOTE. The limitations of a text-book on physiology 

 for schools do not permit so full a description of the voice 

 as the subject deserves. For additional details, the stu- FIG. 155. 

 dent is referred to Cohen's The Throat and the Voice, a 

 volume in the American Health Primer Series, and Browne and 

 Behnke's Voice, Song and Speech. 



