Specification of rear admiral Sir Henry Hart
Subtitle: apparatus for ventilating chimnies
Publisher: Queen's Printing Office
Published: 1854
Place of publication: London
Language: eng
Subjects: Smoke prevention; Chimneys
Description: Patent for "improvements in apparatus for preventing what are called smokey chimnies".
Notes: Cover title.

At head of title: A.D. 1848. No. 12,187.

"Rear Admiral, Sir Henry Hart, commissioner of Greenwich Hospital".