Specification of William James Johnson
Subtitle: apparatus for condensing fumes and smoke
Publisher: Great Seal Patent Office
Published: 1870
Place of publication: London
Language: eng
Subjects: Smoke prevention; Asphyxiating and poisonous Gases
Notes: Cover title.

At head of title: A.D. 1870, 23rd July. No. 2074.

"William James Johnson, of Allendale, in the county of Northumberland".