Specification of Francis Robert Hoghton
Subtitle: instrument for treating deafness, &c
Publisher: Great Seal Patent Office
Published: 1874
Place of publication: London
Language: eng
Subjects: Hearing Aids
Description: Patent for an "appliance for treating and curing deafness and noises in the head... which I term an "electro-galvanic sound conductor"."
Notes: At head of title: A.D. 1873, 7th July. No. 2343.

Cover title.

"Francis Robert Hoghton, of no.2, Onlsow Villas, Richmond, in the county of Surrey, surgeon aurist".