Specification of John Stephens
Subtitle: treating excreta, &c
Publisher: Great Seal Patent Office
Published: 1874
Place of publication: London
Language: eng
Number of pages: 11
Subjects: Sewage; Peat; Sewerage; Filters and filtration; Ammonia
Notes: Cover title.

At head of title: A.D. 1873, 30th July. No. 2581.

"John Stephens, of Ryder Street, St. James', in the county of Middlesex."