Specification of Francis Erskine and William Samuel Denby
Subtitle: gully or stench trap
Contributors: Denby, William Samuel
Publisher: Great Seal Patent Office
Published: 1873
Place of publication: London
Language: eng
Subjects: Sewer gas; Sewerage; Odor control
Notes: Cover title.

At head of title: A.D. 1868, 12th December. No. 3784.

"Francis Erskine, of Salford, in the county of Lancaster, and William Samuel Denby, of Heaton Norris, in the said county, ironfounders"