llustration we have the appearances presented in a man affected with
tuberculosis of the lungs and larynx. The pallor of the larynx is
characteristic. There is weakness of the internal thyro-arytenoid
muscle on the right side, which results in imperfect tension of the
vocal band on that side, so that the voice is uncertain and harsh.
Such illustrations are introduced to impress the normal by contrast.
The reader is strongly advised to compare these figures with others in
the body of the work, especially those of Chapter VII.

PREFACE TO THE FOURTH REVISED AND ENLARGED EDITION.

In addition to certain emendations, etc., introduced throughout the
work, I have thought it well to add a chapter in which the whole
subject is treated in a broad and comprehensive way in the light of
the latest scientific knowledge.

In this review the psychological aspects of the subject have not been
neglected, and the whole has been related to practice to as great an
extent as the character of the book permits.

It is significant that on both sides of the Atlantic there is a
growing conviction that the foundations for speaking and singing as an
art must be made as scientific as the state of our knowledge will
permit.

THE AUTHOR.

January, 1913.

PREFACE TO THE THIRD EDITION.

No preface to the Second Edition was written, so few were the changes
that were made in the work, and the same might apply to this Third
Edition. However, the fact that within a period of less than two
years, a Second English and a Third American Edition have been called
for, seems to the Author to be so conclusive an endorsement of the
application of science to vocal art, that he may be entitled at least
to express his gratification at the progress the cause, to which he
has devoted his pen, is making. It would seem that the better portion
at least of that public that is interested in the progress of vocal
art has made up its mind that the time has come when sense and science
must replace tradition and empiricism.

THE AUTHOR.

MONTREAL, September, 1908.

PREFACE.

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