Specification of James Beckett and John James Cam
Subtitle: treating sewage
Contributors: Cam, John James
Publisher: Great Seal Patent Office
Published: 1872
Place of publication: London
Language: eng
Subjects: Sewage; Filters and filtration; Sewage disposal plants; Lime
Notes: Cover title.

At head of title: A.D. 1871, 10th August. No. 2109.

"James Beckett and John James Cam, of Worcester, in the county of Worcester, engineers".