Specification of John Leigh
Subtitle: treating sewage
Publisher: Great Seal Patent Office
Published: 1873
Place of publication: London
Language: eng
Subjects: Sewage; Water Pollution; Prevention & control
Notes: Cover title.

At head of title: A.D. 1873, 11th June. No. 2071.

"John Leigh, of Manchester, in the county of Lancaster, civil engineer."