Specification of John Leopard
Subtitle: treating and filtering sewage
Publisher: Great Seal Patent Office
Published: 1870
Place of publication: London
Language: eng
Subjects: Sewage; Sewerage; Filters and filtration; Deodorization; Sewage disposal plants; Manures
Notes: Cover title.

At head of title: A.D. 1870, 21st February. No. 506.

"John Leopard, of Hassocks Station, Hurstpierpoint, in the county of Sussex".