Specification of Thomas Walker and Thomas Ferdinand Walker
Subtitle: utilizing sewage
Contributors: Walker, Thomas Ferdinand
Publisher: Great Seal Patent Office
Published: 1865
Place of publication: London
Language: eng
Subjects: Sewage; Manures; Sewerage; Sewage disposal plants; Pumping machinery
Notes: Cover title.

At head of title: A.D. 1864, 22nd September. No. 2329.

"Thomas Walker and Thomas Ferdinand Walker, both of Birmingham, in the county of Warwick, engineers".