Specification of Peter Spence
Subtitle: treating sewage
Publisher: Great Seal Patent Office
Published: 1871
Place of publication: London
Language: eng
Subjects: Sewage; Deodorization; Manures
Notes: Cover title.

At head of title: A.D. 1870, 9th July. No. 1949.

"Peter Spence, of Newton Heath, Manchester, manufacturing chemist".