Specification of John Barker
Subtitle: consuming smoke in furnaces, &c
Publisher: Great Seal Patent Office
Published: 1868
Place of publication: London
Language: eng
Subjects: Smoke prevention; Furnaces
Notes: Cover title.

At head of title: A.D. 1868, 3rd March. No. 718.

"John Barker, of Todmorden, in the county of York".