Specification of William Henry Hughan
Subtitle: treatment of sewage, &c
Publisher: Great Seal Patent Office
Published: 1874
Place of publication: London
Language: eng
Subjects: Sewage; Filters and filtration; Manures
Notes: Cover title.

At head of title: A.D. 1874, 5th June. No.1959.

"William Henry Hughan, of Southport, in the county of Lancaster".