Public Domain Mark
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Credit
Specification of Julius Jeffreys : respirators. Public Domain Mark. Source: Wellcome Collection.
Specification of Julius Jeffreys : respirators.
- Jeffreys, Julius, 1800-1877.
- Date:
- 1857
- Books
- Online
About this work
Description
Patent for improvements to his previous design for a respirator.
Publication/Creation
London : Great Seal Patent Office, 1857 (London : George E. Eyre and William Spottiswoode)
Physical description
5 pages, 1 folded leaf of plates : illustrations ; 28 cm
Contributors
Notes
At head of title: A.D. 1844. No. 10.287.
"Julius Jeffreys, of Clapham, in the county of Surrey, gentleman".
Type/Technique
Languages
Where to find it
Location Status Access Closed storesPat. vol. 19Location Access Closed storesPat. vol. 19:17Note