BOOKS CONSULTED.
TITLE AUTHOR PUBLISHED An Essay on the History and Theory of Music, and of the Qualities and Capacity of the Human Voice Isaac Nathan London, 1823.
Elements of Vocal Science Richard Mackenzie Bacon London, 1824.
Orthophony; or the Cultivation of the Voice in Elocution William Russell Boston, 1859.
Vocal Physiology Charles Alex.

Guilmette New York, 1860.
Die Lehre von den Tonempfindungen als physiologische Grundlage fuer die theorie der Musik H.L.F.Helmholtz Brunswick, 1863.
The Sensations of Tone as a Physiological Basis for the Theory of Music H.L.F.

Helmholtz (Translation of above) (Translated by A.J.
Ellis) London, 1875.
Sound John Tyndall London, 1867.
Principles of Elocution and Voice Culture Benj.

W.Atwell Providence, 1868.
The Voice, Its Artistic Production, Development and Preservation George J.Lee London, 1870.
The Cultivation of the Speaking Voice John Pyke Hullah Oxford, 1870.
Voice Building Horace R.Streeter Boston, 1871.
Principles of Elocution and Voice Culture Benjamin Atwell Boston, 1872.
Hints for Pronunciation in Singing Georgiana Weldon London, 1872.
The Voice in Singing Emma Seiler Philadelphia, 1872 The Voice as an Instrument Ange A.Pattou New York, 1878.
The Vocal Process John Howard New York, 1878.
Speech in Song Alexander J.Ellis London, 1878.
Voice and Vocalization Wm.

P.Robert London, 1879.
The Human Voice and Connected Parts Joseph Montgomery Farrar London, 1881.
The Mechanism of the Human Voice Emil Behnke London, 1882.
Gymnastics of the Voice Oskar Guttmann Albany, 1882.
The Art of Voice Production with Special Reference to the Methods of Correct Breathing Ange A.Pattou New York, 1882.
The Old Italian School of Singing Leo Kofler Albany, 1882.
The Secrets of the Voice in Singing Emilio Belari New York, 1883.
Deep Breathing Sophia A.Ciccolina New York, 1883.
Artistic Voice in Speech and Song Charles Lunn London, 1884.
Voice, Song and Speech Lennox Browne and Emil Behnke London, 1884.
Modern Singing Methods, Their Use and Abuse John Franklin Botume Boston, 1885.
The Diaphragm and Its Functions J.M.W.Kitchen Albany, 1885.
The Voice from a Practical Standpoint Edmund J.Meyer New York, 1886.
The Hygiene of the Vocal Organs Morrell Mackenzie, M.D.