Specification of Julius Jeffreys
Subtitle: respirators
Publisher: Great Seal Patent Office
Published: 1857
Place of publication: London
Language: eng
Subjects: Respirators (Medical equipment)
Description: Patent for "improvements in curing or relieving disorders of the lungs" by means of an "apparatus [that] will [enable the wearer to] constantly breath warm air".
Notes: At head of title: A.D. 1836. No. 6988.

"Julius Jeffreys, of Osnaburgh Street, Regent's Park, in the county of Middlesex".