Specification of Robert Knott
Subtitle: treating sewage, &c
Publisher: Great Seal Patent Office
Published: 1874
Place of publication: London
Language: eng
Subjects: Sewage; Bleaching; Water Pollution; Prevention & control
Notes: Cover title.

At head of title: A.D. 1873, 15th July. No. 2442.

"Robert Knott, of Bolton, in the county of Lancaster, bleacher."