Nervousness, 249, 256. Old Italian masters, 9, 11, 14, 54, 306, 320. method, 10, 304, 316, 320. Open throat, 14, 60, 86, 191. Placing the voice, 38, 41, 93, 310. Practice, 5, 105, 281, 366. Precepts, 13, 72, 76, 184, 186, 317. Problem of voice, 4, 7, 287, 324, 337, 338. Psychology of muscular guidance, 136, 227. of sympathetic sensations, 165. of vocal management, 144, 229, 297. Pure vowel theory, 88. Quality of tone, 40, 62, 156, 179, 182, 314, 346. Radiation of nerve impulse, 251, 259. Reflex actions, 247, 255. Registers, 34, 38, 55, 312, 315. Relaxing exercises, 90, 272. Resonance, 54, 58. chest, 61, 127. mouth-pharynx, 59. nasal, 62, 87, 127, 204. sounding-board, 44, 65. Sensations of singing, 160. direct, 161, 173. in modern instruction, 78, 84, 114. muscular, 78. sympathetic, 161, 162, 176. of vibration, 54, 55, 58, 80. Sight reading, 309, 310, 313. Singing in the mask, 74, 81. on the breath, 14, 27, 32, 72, 194. Sol-fa, 310, 314. Stiffness, muscular, 240, 251. throat, 89, 243, 260, 262, 285, 356, 358. Support of tone, 14, 27, 32, 73, 192. Sympathetic sensations, 161, 162, 165, 176. Technique, 6, 94, 282. Throat stiffness, 89, 243, 260, 262, 285, 356, 358. Tone-production, 4. problem of 7, 287, 324, 337, 338. Tosi, 12, 55, 63, 156, 307, 308, 322. Traditional precepts, 13, 14, 76, 186, 317. empirical basis, 184. in modern instruction, 72, 77. Tremolo, 265, 272. Vocal action, 5, 17, 92, 112, 246. Vocal Science, 17, 19, 37, 98, 152, 339, 361, 367. Wearing voice into place, 101.