102 OP THE VOICE AND SPEECH. 



159. Speech is a peculiar modification of the voice, 

 adjusted to the formation of the sounds of letters by 

 the expiration of air through the mouth or nostrils, and 

 in a great measure by the assistance of the tongue, 

 applied and struck against the neighbouring parts, the 

 palate and teeth in particular, and by the diversified 

 action of the lips.* (B) 



The difference betAveen voice and speech is there- 

 fore evident. The former is produced in the larynx ; 

 the latter by the singular mechanism of the organs 

 above described. 



Voice is common to both brutes and man, even 

 immediately after birth, nor is entirely absent in those 

 wretched infants who are born deaf. But speech fol- 

 lows only the culture and employment of reason, and 

 is consequently, like it, the privilege of man in dis- 

 tinction to the rest of animal nature. For brutes, 

 natural instinct is sufficient: but man, destitute of this 

 and other means of supporting his existence inde- 

 pendently, enjoys the prerogative of reason and lan- 

 guage ; and following, by their means, his social des-^ 

 tination, is enabled to form, as it were, and manifest 

 his ideas, and to communicate his wants to others, by 

 the organs of speech. 



1GO. The mechanism f of speech and articulation is. 



* See Rich. Payne Knight, Analytical Essay on the Greek Alphabet. Lond. 

 1791. 4to. p. 3. 



f Consult F. Mercur. ab Hclmont, Alpkabeti vcre naturalis Hcbraici 

 Ddineiitio. Sulzbac. 1C57. 12mo. 



Joach. Jungius, Do.roscopia; Pftysicte Minor es (1GC2.) 4 to. Append. Sec- 



tion, i. P. ii. fol. Gg. ii. 3. 



J. Wulljji, Grammatica Linguce Anglicancc, cui fteefigtoivf tie loqucla s 



