The physiology of the human voice : being a treatise on the natural powers of the vocal organ, pointing out the difference between the speaking and singing qualities of tone, and giving laws for the proper production of the musical voice, from its lowest to its highest pitch / by F. Romer.

Licence: Public Domain Mark

Credit: The physiology of the human voice : being a treatise on the natural powers of the vocal organ, pointing out the difference between the speaking and singing qualities of tone, and giving laws for the proper production of the musical voice, from its lowest to its highest pitch / by F. Romer. Source: Wellcome Collection.