Specification of James Yearsley
Subtitle: artificial tympanums for the ear
Publisher: Great Seal Patent Office
Published: 1857
Place of publication: London
Language: eng
Subjects: Hearing Aids
Notes: Cover title.

At head of title: A.D. 1856. No. 2737.

"James Yearsley, of Saville Row, Saint James',  in the county of Middlesex,member of the Royal College of Surgeons".