Specification of John Hanson
Subtitle: treating sewage
Publisher: Great Seal Patent Office
Published: 1875
Place of publication: London
Language: eng
Subjects: Sewage; Manures; Sewage disposal; Lime
Notes: Cover title.

At head of title: A.D. 1875, 28th July. No. 2675.

"John Hanson, of Savile Town, near Dewsbury, in the county of York, manufacturing chemist."