Specification of Dugald Campbell
Subtitle: treating sewage, &c
Publisher: Great Seal Patent Office
Published: 1872
Place of publication: London
Language: eng
Subjects: Sewage; Manures; Phosphates
Notes: Cover title.

At head of title: A.D. 1872, 30th March. No. 944.

"Dugald Campbell, consulting and analytical chemist, 7, Quality Court, Chancery Lane, London, Middlesex."