_The Art of Breathing_. New York, 1889. Clara Kathleen Rogers: _The Philosophy of Singing_. New York, 1893. Albert B. Bach: _The Principles of Singing_. London (2d ed.), 1897. Julius Stockhausen's _Gesangsmethode_. Leipzig, 1884. Sir Morell Mackenzie: _The Hygiene of the Vocal Organs_. London, 1886. Charles Lunn: _The Philosophy of the Voice_. London, 1878. Antoine Ferrein: _De la Formation de la Voix de l'Homme_. Paris, 1741. Sir Charles Bell: _On the Organs of the Human Voice_. London, 1832. Carl Ludwig Merkel: _Der Kehlkopf_. Leipzig, 1873. Dr. L. Mandl: _Die Gesundheitslehre der Stimme_. Braunschweig, 1876. George F. Ladd: _Outlines of Physiological Psychology_. New York, 1892. James M. Baldwin: _Feeling and Will_. New York, 1894. H. S. Curtis: "Automatic Movements of the Larynx," _Amer. Jour. Psych._, Vol. 11, p. 237. 1900. H. L. F. Helmholtz: _Die Lehre von den Tonempfindungen_. Braunschweig, 1862. E. W. Scripture: _The New Psychology_, London, 1897. _The Elements of Experimental Phonetics_. New York, 1902. _The Study of Speech Curves_. Washington, 1906. William James: _The Principles of Psychology_. New York, 1890. Hansen and Lehmann: "Ueber unwillkuerliches Fluestern," _Philo. Stud._, Vol. 11, p. 471. 1895. C. Lloyd Morgan: _An Introduction to Comparative Psychology_. 1894. Wilhelm Wundt: _Grundzuege der physiologischen Psychologie_. Leipzig, 1874. Grove's _Dictionary of Music and Musicians_. Fetis: _Biographie universelle des Musiciens_. Musikalisches Conversations-Lexikon. Quellen Lexikon der Musiker. (Robt. Eitner, Leipzig, 1902.) INDEX Acoustics of voice, 188, 216. Anatomy of vocal organs, 211. Attack, 51, 53. Breathing, 20, 130. Breath, singing on the, 14, 27, 32, 72, 194. Candle-flame test, 221. Coloratura, 195, 282. Decline of singing, 341. Ear training, 276, 281, 319, 351. Emission, 68, 125, 188. Empirical knowledge, 151, 176, 181, 359. basis of, 155. in modern instruction, 75, 199, 207. in traditional precepts, 184. Enunciation, 88. Exercises for breath-control, 26, 31. for breathing, 22. for muscular movements, 46, 50. for relaxing muscles, 90, 272. on vowels and consonants, 85. Forward tone, 14, 68, 71, 125, 187. Garcia, 16, 22, 34, 35, 56, 328. Glottic stroke, 30, 52. History of voice culture, 8, 322. Howard, John, 43. Imitation, 134, 166, 291, 298, 307, 309, 324, 332. Intonation, 265, 311, 314, 352. Laryngeal action, 34, 36, 44. Laryngoscope, 16, 35, 56, 214, 215, 258, 336. Lessons, 103, 366. Local effort, 273. Mancini, 12, 156, 307, 314, 323. Mask, singing in the, 74, 81. Mechanical vocal management, 83, 102, 109, 113, 135, 271, 287, 297, 299, 321, 329, 333, 346. Mechanics of voice, 118, 220, 325, 335. Mental voice, 180, 183. Messa di voce, 40, 312. Method, 92, 96, 99. Old Italian, 10, 304, 316, 320. Methode de Chant, 326. Muscular sense, 143, 170. stiffness, 240, 251. strain, 267. Nasal tone, 62, 129, 205.