Specification of Henry Cowan, John Cowan, Phineas Cowan
Subtitle: consuming and utilizing smoke
Contributors: Cowan, John, active 19th century; Cowan, Phineas
Publisher: Great Seal Patent Office
Published: 1855
Place of publication: London
Language: eng
Subjects: Smoke prevention
Notes: Cover title.

At head of title: A.D. 1854. No.2187.

"Henry Cowan, John Cowan, Phineas Cowan, all of New Gravel Lane, Shadwell, in the county of Middlesex, soap manufacturers".