The dentaphone
Subtitle: a new scientific invention, which enables the deaf to hear by the sound-vibrations conveyed through the medium of the teeth, and the deaf and dumb to hear and learn to speak
Series: Francis A. Countway Library of Medicine--Medical Heritage Library digitization project
Publisher: American Dentaphone
Published: 1879
Place of publication: Cincinnati
Language: eng
Number of pages: 16
Subjects: Deafness; Hearing aids; Hearing Aids