Specification of Henry Dubs and Josiah Evans
Subtitle: furnaces
Publisher: Great Seal Patent Office
Published: 1857
Place of publication: London
Language: eng
Subjects: Smoke prevention; Furnaces
Notes: Cover title.

At head of title: A.D. 1856. No.1912.

"Henry Dubs, of the Vulcan Foundry, Warrington, in the county of Lancaster, engineer, and Josiah Evans, of Haydock, in the same county, engineer".