Specification of Robert Stevenson Symington
Subtitle: apparatus for dealing with sewage, &c
Publisher: Great Seal Patent Office
Published: 1873
Place of publication: London
Language: eng
Subjects: Sewage; Sewerage; Filters and filtration; Deodorization; Water Pollution; Prevention & control
Notes: Cover title.

At head of title: A.D. 1873, 13th March. No. 912.

"Robert Stevenson Symington, of Glasgow, in the county of Lanark, North Britain, telegraph engineer."