XXIV 



LIST OF ILL USTRA TIONS. 



FIG. PAGE 



439. Pitch of the vowels according to Hermann .... 1227 



440. Diagram showing Boeke's theory of measurement of depth of curve . 1227 



441. Examples of vowel curves obtained by Hermann .... 1228 



442. Examples of tracings obtained by M'Kendrick's phonograph recorder . 1229 



443. Curves by Boeke . . . . . . . .1231 



444. Diagram showing harmonic analyses of the curves in Fig. 443 . .1231 



445. Diagram showing the course of the nerve fibres concerned with taste . 1238 



446. 447. Diagrams showing the position and extent of the olfactory mucous 



membrane ....... 1246, 1247 



448. Diagram of olfactory path (Cajal) ..... 1247 



449. Diagram of Zwaardemaker's olfactometer ..... 1250 



