Specification of Isaac Brown
Subtitle: treating sewage
Publisher: Great Seal Patent Office
Published: 1873
Place of publication: London
Language: eng
Subjects: Sewage; Manures; Filters and filtration; Sewage disposal plants
Notes: Cover title.

At head of title: A.D. 1872, 30th July. No. 2279.

"Isaac Brown, of Elm Croft Grange, Edinburgh, in the county of Mid Lothian, North Britain."