Specification of Adolphe Pierre Vassard
Subtitle: treating liquid sewage, &c
Publisher: Great Seal Patent Office
Published: 1872
Place of publication: London
Language: eng
Subjects: Sewage; Manures; Sewerage; Filters and filtration; Sewage disposal plants
Notes: Cover title.

At head of title: A.D. 1871, 1st November. No. 2926.

"Adolphe Pierre Vassard, of New Cross, in the county of Kent, chemist".