The art of improving the voice and ear; and of increasing their musical powers, on philosophical principles. Adapted to public speakers, musicians, and actors, and particularly useful for the instructors of youth.

Licence: Public Domain Mark

Credit: The art of improving the voice and ear; and of increasing their musical powers, on philosophical principles. Adapted to public speakers, musicians, and actors, and particularly useful for the instructors of youth. Source: Wellcome Collection.