X CONTENTS. 



PAGE 



relative aptitude of different regions in appreciating it; \ariable 

 sensation according to the form of the body and the extent of 

 its surface. Sensation of temperature, variable according to the 

 temperature of the skin, the density of bodies, and the surface in 

 contact ; identical sensation from contact with a body very hot 

 and very cold ; relative sensibility of different regions to tem- 

 perature. The touch; its delicacy. The touch compared with 

 the other senses ; illusions of touch ; persistence of tactile impres- 

 sions, sensations from internal or subjective causes ; causes which 

 modify feeling, .217 



CHAPTER XVI. 



Voice and speech. Organ of voice; larynx, cavity of the larynx, 

 glottis, vocal cords ; the larynx at different ages and in different 

 sexes. Physiology of the larynx ; mechanism of the voice ; 

 opinions as to the formation of the voice. Galen, Fabricius 

 Acquapendente, Dodart, Ferrein, Biot, Miiller, Savart, Masson, 

 and Longet. Theories founded on laryngoscopic observations. 

 Formation of sounds in whistling. Voice; speaking voice, 

 mechanism of articulate sounds, vowels, consonants, timbre of the 

 vowels; the tongue as an organ of pronunciation. Singing; 

 chest voice, falsetto voice, mixed voice ; different theories on the 

 formation of the falsetto : Miiller, M. Segond, M. Longet, M. 

 Fournie, M. Bataille, M. Mandl. Timbres of the voice : high 

 pitch, grave pitch. Compass of voices: bass, baritone, tenor, 

 contralto, mezzo-soprano, soprano. Ventriloquy, 228 



CHAPTER XVII. 



Physiognomy ; study of it in works of art. Movements of expres- 

 sion, their seat. Colouring of the skin ; paleness, redness. Ex- 

 pression of the muscles; effort, muscles of the face. Physiognomy 

 of the senses. Expression of the eyes, vision, easy or difficult, 

 blindness. Expression in the act of hearing, easy or difficult, 

 hearing of an orator, musical hearing. Expressions of smell and 

 taste. Expressions relating to the touch 247 



