Specification of Joseph Townsend
Subtitle: treating sewage
Publisher: Great Seal Patent Office
Published: 1873
Place of publication: London
Language: eng
Subjects: Sewage; Deodorization; Nitrogen; Phosphorus
Notes: Cover title.

At head of title: A.D. 1873, 31st May. No. 1967.

"Joseph Townsend, of Glasgow, in the county of Lanark, North Britain, manufacturing chemist."