Specification of Richard Ireland Watts, John Offord, and John Roberts Thomas
Subtitle: condensing and consuming smoke
Contributors: Offord, John; Thomas, John Roberts
Publisher: Great Seal Patent Office
Published: 1860
Place of publication: London
Language: eng
Subjects: Smoke prevention; Coal; Fires
Notes: At head of title: A.D. 1859, 13th August. No.1874.

"Richard Ireland Watts, of Plymouth, in the county of Devon, merchant, John Offord, of the same place, gentleman, and John Roberts Thomas, also of the same place, engineer".