Specification of John Lacey Davies
Subtitle: purifying smoke
Publisher: Great Seal Patent Office
Published: 1867
Place of publication: London
Language: eng
Subjects: Smoke prevention; Fireplaces
Notes: Cover title.

At head of title: A.D. 1867, 9th April. No. 1058.

"John Lacey Davies, of the firm of John Davies and Son, of 4, St. Ann's Square, Manchester... patent agents".