Specification of Nathaniel Heckford
Subtitle: purifying rivers and treating night soil
Publisher: Great Seal Patent Office
Published: 1860
Place of publication: London
Language: eng
Subjects: Rivers; Sewage; Cesspools; Manures; Sewerage; Deodorization; Seawater; Water Pollution; Prevention & control
Notes: Cover title.

At head of title: A.D. 1859, 16th September, No. 2107.

Nathaniel Heckford, of Forest Gate, in the county of Essex, gentleman".