Specification of John William Slater
Subtitle: treating sewage
Publisher: Great Seal Patent Office
Published: 1876
Place of publication: London
Language: eng
Subjects: Sewage; Sewerage; Filters and filtration; Sewer gas; Ammonia
Notes: Cover title.

At head of title: A.D. 1875, 21st October. No. 3668.

"John William Slater, of no.2, Tamworth Terrace, in the county of Middlesex, analytical chemist."