Public Domain Mark
You can use this work for any purpose without restriction under copyright law. Read more about this licence.
Credit
The possibility of obtaining marked improvement in the treatment of deafness and supposed deaf-mutism by acoustic gymnastics : a system of vocal training of the auditory nerve, as advocated by Professor Urbantschitsch of Vienna / by M.A Goldstein. Public Domain Mark. Source: Wellcome Collection.
Provider
This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.