The present work is based on a life study of the voice, and has grown out of the conviction that all teaching and learning in voice-culture, whether for the purposes of singing or speaking, should as far as possible rest on a scientific foundation.

The author, believing that practice and principles have been too much separated, has endeavored to combine them in this book. His purpose has not been to write an exhaustive work on vocal physiology, with references at every step to the views of various authors; rather has he tried always to keep in mind the real needs of the practical voice-user, and to give him a sure foundation for the principles that must underlie sound practice. A perusal of the first chapter of the work will give the reader a clearer idea of the author's purpose as briefly expressed above.

The writer bespeaks an unprejudiced hearing, being convinced that in art as in all else there is but one ultimate court of appeal: to the scientific, the demonstrable—to what lies at the very foundations of human nature.

In conclusion, the author desires to thank those publishers and authors who have kindly permitted the use of their illustrations.

The Author.

McGill University, Montreal, October, 1906.